Acp

TEAM COMPONENT MAINTENANCE MANUAL

ACP2531(-)

(b) ACP2531AB04

The pilots can set the transceivers or systems that follow to the transmission mode:

- Four radio communication transceivers (VHF1, VHF2,

VHF3, HF1)- Passenger Address - Intercom.

The pilots can adjust the reception volume of the channels that follow:

Four radio communication transceivers (VHF1, VHF2,

VHF3, HF1)Passenger Address Intercom Eight radio navigation receivers (MLS, VOR1/ILS1, VOR2/ILS2, DME1, DME2, ADF1, ADF2, MKR).

(c) ACP2531AC01 / ACP2531AC02

The pilots can set the transceivers or systems thatfollow to the transmission mode:

- Three radio communication transceivers (VHF1, VHF2,HF)

- Two auxiliary transceivers (AUX1, AUX2)

- Intercom.

The pilots can adjust the reception volume of thechannels that follow:

Three radio communication transceivers (VHF1, VHF2,

HF)

Two auxiliary transceivers (AUX1, AUX2)IntercomSeven radio navigation receivers (VOR1/MLS1,

VOR2/MLS2, DME1, DME2, ADF1, ADF2, MKR).

(d) ACP2531AD01

The pilots can set the transceivers or systems that

follow to the transmission mode:

Four radio communication transceivers (V/UHF1,

V/UHF2, VHF, HF) Passenger Address System Intercom system.

Effectivity: All

Page 2

23-51-82 20030131


ACP2531 (-)

The pilots can adjust the reception volume of the -channels that follow:

- Four radio communication transceivers (V/.UHF1,V/UHF2, VHF, HF)

- Passenger Address- Intercom- Seven radio navigation receivers (TAC, VOR1, VOR2,

DME1, DME2, ADF, MKR).

(e) ACP2531AE01

The pilots can set the tranceivers or systems thatfollow to the transmission mode:

- Four radio communication transceivers (VFM1, VFM2,HF, V/UHF2)

- Passenger Address - Intercom.


- Four radio communication receivers V/UHF2)

- Passenger Address- Intercom- Five radio navigation receivers

ADF, DL).

(f) ACP2531AF01

(VFM1, VFM2, HF,

(TAC, VOR1, ESM,


- Four radio communication transceivers (VFM1, VFM2, HF, V/UHF2)

- Intercom.

The pilots can adjust the reception audio level of the channels that follow:

- Four radio communication transceivers (VFM1, VFM2,HF, V/UHF2)

- Intercom.

Effectivity: All

Page 3

23-51-82 19980630


ACP2531(-)

(g) ACP2531


- Four radio communication transceivers (VHF1, VHF2,HF1, HF2)

- Passenger Address - Intercom system.


Four radio communication transceivers (VHF1, VHF2,HF1, HF2)Passenger Address Intercom Eight radio navigation receivers (MLS, VOR1/ILS1, VOR2/ILS2, DME1, DME2, ADF1, ADF2, MKR).

(h) ACP2531AK01


- Four radio communication transceivers (VHF1, VHF2, HF, VUHF/SAT)

- Passenger Address - Intercom system.


Four radio communication transceivers (VHF1, VHF2,HF, VUHF/SAT)Passenger Address Intercom Seven radio navigation receivers (VOR1/ILS1, VOR2/ILS2, DME1, DME2, ADF1, ADF2, MKR) One spare channel.

Effectivity: All

Page 4

23-51-82 20040229


ACP2531(-)

(i) ACP2531AL01


- Five radio communication transceivers (VHF1, VHF2,HF, UHF1, UHF2)

- Intercom system.

The pilots can adjust the reception volume of thechannels that follow:

- Five radio communication transceivers (VHF1, VHF2,HF, UHF1, UHF2)

- Intercom - Eight radio navigation receivers (VORl/ILS1,

VOR2/ILS2, DME1, DME2, ADF1, ADF2, MKR, TAC).

(j) ACP2531BDO1


- Four radio communication transceivers (VHF1, VHF2,VU1, VU2)

- Intercom system (INT)- Spare channel (no engraving).

The pilots can do the selection between the "Intercom" or "Radio" PTT. They can also select the "VOICE" filter.



- Intercom (INT)- Eight radio navigation receivers (TAC,

VOR-ILS1/VOR-ILS2, DME1, DME2, ADF1, ADF2, MKR).

Effectivity: All

23-51-82Page 4-1 20050430


ACP2531(-)

(k) ACP2531BF01


- Four radio communication transceivers (VHF1, VHF2,

VU1, VU2)- Intercom system (INT)

The pilots can also do the selection between the "Intercom" or "Radio" PTT.



- Intercom (INT)

The pilots can select Local or General intercom mode.

Effectivity: All

23-51-82 20050430


ACP2531(-)

REVISION REVISION DESCRIPTIONCODE

REVISION SHEET FOR FIGURE 1

Effectivity: All

23-51-82

SERIAL No. EFFECTIVITY

Page 5 19990331


ACP2531(-)

PILOT OR COPILOT OR THIRD MAN

SELECTIONS

AUDIO CONTROL PANEL

ARINC LINK

REMOTE CONTROL AUDIO UNIT

(RCAU)

------------

RADIOHEADSET TRANS-

MITTERS

AIR/GROUND GROUND/AIR

RADIORECEIVERS PASSENGER

RADIO INTERCOM ADDRESSNAVIGATION AMPLIFIERRECEIVERS

LINKS OR AUXILIARY INPUT/OUTPUT

PRESENTATION OF THE AUDIO CONTROL PANEL IN THE COMMUNICATION SYSTEM

FIGURE 1

GRAPHIC GR235182-99B-801-AO1 SHEETNBR 01

Effectivity: All

Page 6

23-51-82 19990331


ACP2531 (-)

C. CHARACTERISTICS

( 1) Dimensions and Weight

(a) Overall Dimensions

- Depth without connector: 140 mm (5. 51 in.)

- Depth with connector: 168 mm ( 6.61 in.)

- Width: 146 mm (5.75 in.)

- Height: 76.16 mm (2.99 in.).

(b) Weight

- ACP2531 : 0.780 kg ( 1.723 lb)

- ACP2531AB01 : 0.780 kg (1.723 1b)

- ACP2531AB04 : 0.780 kg (1.723 lb)

- ACP2531AC01 : 0.740 kg (1.635 1b)

- ACP2531AC02 : 0.740 kg ( 1.635 lb)

- ACP2531AD01 : 0.740 kg ( 1.635 lb)

- ACP2531AE01 : 0.730 kg (1.609 lb)

- ACP2531AF01 : 0.700 kg (1.543 lb)

- ACP2531AK01 : 0.700 kg (1.719 lb) ± 3%

- ACP2531AL01 : 0.780 kg ( 1.719 lb) ± 3%

- ACP2531BDO1 : 0.780 kg ( 1.719 lb) ± 3%

- ACP2531BF01 : 0.710 kg (1.565 lb) ± 3%

(2) Technical Characteristics

- Power supply = 28 V

- Current consumption less than or equal to 200 mA

- Lighting system power supply = 5 V

- Lighting system current consumption less than or equalto 1 A.

( 3) ARINC 429 Transmission

- Transmission = serial mode

- Message transmission frequency = 12.5 kHz

- Electrical standard (refer to Figure 2)

- Contents of a message: 17 words of 32 bits (4 bytes)(refer to Figure 3)

Effectivity: All

Page 7

23-51-82 200 50430


ACP2531(-)

REVISION CODE

Effectivity: All

REVISION DESCRIPTION SERIAL No.EFFECTIVITY


Page 823-51-82 199 80630


ACP2531(-)

HI n

NULL-

LO-j

PARAMETER

Bit Rate Time Y Time X

Pulse Rise Time * * Pulse Fall Time * *

I I I I I1 I I I 1 I 1 I

5 I 6 1 7 I 8 I 9 I 101I I I i I

I 1 I I I II I I 1 I

1 I I I I II I I I I I

I DATA

1 II I I I

DATA BIT ENCODING

HIGH SPEED LOW SPEEDOPERATION OPERATION

100kBPS 12 14.5 kBPS10 psec t 2.5% Z* psec ± 2.5%

5 Nsec t 5% Y/2 ± 5%

1.5 ± 0.5 psec 10 ± 5 Nsec

1.5 ± 0.5 psec 10 t 5 psec

* Z = I where R = bit rate (between 12 and 14.5kBPS) ** Pulse rise and fall times are measured between the 10% and 90%

voltage amplitude points on the leading and trailing edges of the pulse.

OUTPUT SIGNAL TIMING TOLERANCE

ARINC TRANSMISSION - ELECTRICAL STANDARD FIGURE 2

GRAPHIC GR235182-99B-802-AOl

Effectivity: All

SHEETNBR 01

23-51-82 Page 9 19980630


ACP2531(-)



Effectivity: All

23-51-82


Page 10 19980630


ACP2531(-)

1

I.

D

32 31

I

1 STWORD

2.67msec 7.33 msec

10 msec

x

Q

I

301 29 28 27 26 1I

4TH BYTE

co

0m

w

25 1

2ND 3RDWORC WOR

200 msec

Contents of a Message

KEYBOARD OR

AUDIO LEVELDATA SWITCHES STATUS

I 1 I I

24........ 17116 15 14 13 12 11I

I 3RD BYTE 2ND BYTE

1STWOR

1

J wm

aJ

1

10 9 8 7 6 5 4 3 2 1

I 1ST BYTE

DESCRIPTION OF THE ARINC MESSAGE

GRAPHIC GR235182-99B-803-A01

Effectivity: All

FIGURE 3SHEETNBR 01

23-51-82 Page 1119980630


ACP2531(-)

D. DESCRIPTION

( 1) General

The description of the ACP2531(-) is given in Figure 4:

- For the ACP2531, ACP2531ABO1, ACP2531ABO4, ACP2531AK01,ACP2531AL01 or ACP2531BDO1 version, refer to sheet 1.

- For the ACP2531ACO1 or ACP2531AC02 version, refer tosheet 2.

- For the ACP2531AD01 version, refer to sheet 3.

- For the ACP2531AEO1 version, refer to sheet 4.

- For the ACP2531AF01 or ACP2531BF01 version, refer tosheet 5.

(a) The Audio Control Panel is contained in a box. The front panel of the Audio Control Panel is attached to the console with four captive fasteners. The Audio Control Panel is made of alodine-treated light-alloy. It has the sub-assemblies that follow:

- Cover subassembly

- Chassis subassembly

- Front panel subassembly.

(b) Two fasteners secure the cover subassembly to the front panel/chassis subassembly. The rear face of the cover holds the identification plate. There is an opening in the cover subassembly for the main board ARINC connector J1.

(c) The U-shaped chassis has two rectangular side plates. One of these side plates has the same identification plate as the cover.

Two circuit boards (Keyboard and Main) are attached to the chassis.

The Keyboard board contains the mechanical part of the transmission keyboard. This board and the front panel potentiometers are connected to the Main board through a flexible ribbon cable. A metal bar is fixed to the Keyboard board with two screws. It prevents damage to the keyboard when a strong constraint is applied to the keys.

Effectivity: All

23-51-82200850430


ACP2531 (-)

The Main board contains:

- A 15-pin connector with two spring fasteners for connection to the aircraft connector

- The lighting system wires

- Electronic circuits.

A layer of red locking varnish is put on all the screws of the circuit boards.

(d) The front panel assembly has the parts that follow:

- Lighting circuit board

Front face.

The front face is a plexiglas panel. The lighting circuit board is attached to the front plate with four screws. This assembly is attached to the chassis with four screws and washers. The description of the front panel control devices is given in paragraph 1.E.

Two rows of potentiometers are attached to the front panel (refer to paragraphs 1.D.(2) to 1.D.(6)) Atwisted pair of wires is put below the potentiometers for the lighting system power supply. The aircraft lighting system directly supplies the lighting system of the plexiglas panel.

Post SB 2531-23-002 (refer to IPL for applicableversions) the front face is fitted with rubber sealsfor the potentiometers.

(2) ACP2531, ACP2531ABO1, A0P2531AB04, AC22531AK01,ACP2531AL01 and ACP2531BD01

Refer to Figure 4, sheet 1

(a) The Keyboard board contains the mechanical part of the transmission keyboard. It is connected to:

- The seven keys of the keyboard

- The contacts of each key

- The contacts of the "INT/RAD" switch.

Effectivity: All

23-51-82Page 13

200 04305


ACP2531(-)

(b) The front face is a brown (AC22531 and ACP2531AB) orgrey (ACP2531AK01 and ACP2531AL01) or black(ACP2531BDO1) plexiglas panel. Two rows of seven potentiometers are attached to the front panel. The aircraft lighting system directly supplies the lighting system of the plexiglas panel on which the inscriptions are white during daytime and bluish white at night.


( 3) ACP2531AC01 / ACP2531AC02



- The six keys of the keyboard - The contacts of each key - The contacts of the "INT/RAD" switch.

(b) The front face is a grey plexiglas panel. One row of six potentiometers and one row of sevenpotentiometers are attached to the front panel. The aircraft lighting system directly supplies the lighting system of the plexiglas panel on which the inscriptions are white during daytime and bluish white at night.


(4) ACP2531AD01



- The seven keys of the keyboard - The contacts of each key - The contacts of the "INT/RAD" switch.

(b) The front face is a black plexiglas panel. One row of seven potentiometers and one row of sixpotentiometers are attached to the front panel. Therow of six potentiometers also contains one2-position switch (LOCAL/GENERAL). The aircraft

lighting system directly supplies the lighting systemof the plexiglas panel on which the inscriptions arewhite during daytime and bluish white at night.


Effectivity: All

23-51-82 20040229


ACP2531(-)

(5) ACP2531AE01



- The seven keys of the keyboard



(b) The front face is a black plexiglas panel. One row of seven potentiometers and one row of fourpotentiometers are attached to the front panel. Therow of four potentiometers also contains one 2-position switch (LOCAL/GENERAL). The aircraftlighting system directly supplies the lighting systemof the plexiglas panel on which the inscriptions arewhite during daytime and bluish white at night.


( 6) ACP2531AFO1/ACP2531BF01



- The five keys of the keyboard



(b) The front face is a black plexiglas panel. One row of five potentiometers and one row of one 2-positionswitch (LOCAL/GENERAL) are attached to the frontpanel. The aircraft lighting system directly supplies the lighting system of the plexiglas panel on which the inscriptions are white during daytime and bluish white at night.


Effectivity: All

23-5 1

82 200550430


ACP2531 (-)

REVISION REVISION DESCRIPTION SERIAL No.CODE EFFECTIVITY

1 Figure 4 - Sheet 1 : All

Adding of ACP2531 version in title andeffectivity

2 Figure 4 - Sheet 1 to Sheet 5 All

Metal bar fixed to the Keyboard Board(SB 2531-23-001)

3 Figure 4 - Sheet 1 to Sheet 5 From SN 2188Adding of rubber seals (Post SB 2531- (ACP2531AC02)23-002) From SN 2400

(other versions)

4 Figure 4 - Sheet 1 All

Applicable to ACP2531, ACP2531ABO1, ACP2531ABO4, ACP2531AK01, ACP2531AL01

5 Figure 4 - Sheet 1 All

Applicable to ACP2531, ACP2531ABO1, ACP2531AB04, ACP2531AK01, ACP2531AL01, ACP2531BD01

Figure 4 - Sheet 5

Applicable to ACP2531AF01/ACP2531BF01


Effectivity: All

Page 1620050430


ACP2531(-)

DESCRIPTION

I ACP2531/ACP2531ABO1/ACP2531AB04/ACP2531AK01/ACP2531ALO1/ACP2531BDO1FIGURE

GRAPHIC GR235182-99B-804-A01

Effectivity: ACP2531ACP2531ABO1 ACP2531AB04ACP2531AKO1

IACP2531AL01, ACP2531BDO1

4 - SHEET 1 SHEETNBR 01

Page 17/1823-51-82 20050430


ACP2531(-)

13 POTENTIOMETERS (2 ROWS)

COVER SUBASSEMBLY

DETAIL A

MAIN BOARD

RUBBER SEAL (POST SB 2531-23-002)

CHASSIS SUBASSEMBLY

FASTENER

DESCRIPTION - ACP2531ACO1/ACP2531AC02FIGURE 4

GRAPHIC GR235182-99B-804-AO1

Effectivity: ACP2531AC01ACP2531AC02

- SHEET 2 SHEETNBR 02

Pa 023'51'82 20030131


ACP2531(-)


+ 1 SWITCH

COVER SUBASSEMBLY

DETAIL A

MAIN BOARD


CHASSIS SUBASSEMBLY

FASTENER

DESCRIPTION - ACP2531AD01FIGURE 4

GRAPHIC GR235182-99B-804-A01

Effectivity: ACP2531AD01

SHEET 3SHEETNBR 03

Page 21/2223-51-82 20030131


ACP2531(-)


+ 1 SWITCH

COVER SUBASSEMBLY

DETAIL A

MAIN BOARD


FASTENER

DESCRIPTION - ACP2531AE01 FIGURE 4 - SHEET 4


Effectivity: ACP2531AE01

SHEETNBR 04

23-51-82 Page 23/24 20030131


ACP2531(-)

DESCRIPTION - ACP2531AFO1/ACP2531BF01 I FIGURE 4 - SHEET 5

GRAPHIC GR235182-99B-804-AO1 SHEETNBR 05

Effectivity: ACP2531AF01ACP2531BF01

23-51-82 Page 25/2620050430


ACP2531(-)

E. CONTROL DEVICES

(1) ACP2531, ACP2531ABOl and ACP2531AB04

(Refer to Figure 5, sheet 1)

(a) The front panel of the ACP2531, ACP2531ABO1 orACP2531AB04 Audio Control Panel has the controldevices that follow:

Six transmission keys, which are mechanicallyinterlocked:

ACP2531 VHF1, VHF2, INT, PA, HF1, HF2ACP2531ABOl: VHF1, VHF2, INT, VHF3, HF1, HF2ACP2531AB04: VHF1, VHF2, INT, PA, HF1, VHF3

A VOICE ONLY key for the selection of a 1020Hzfilter.

A INT/RAD 3-position toggle switch for theselection of the Radio/Interphone push-to-talkcontrol.

- For the ACP2531ABOl version, five audio levelcontrol potentiometers for the HF (HF1 and HF2) andVHF (VHF1, VHF2, VHF3) communication receivers.

For the ACP2531 and ACP2531AB04 versions, fouraudio level control potentiometers for thecommunication receivers:

ACP2531 VHF1, VHF2, HF1, HF2ACP2531AB04: VHF1, VHF2, HF1, VHF3

For the ACP2531 and ACP2531AB04 versions, one PA(Passenger Address) audio level controlpotentiometer.

One INT (Interphone) audio level controlpotentiometer.

- Eight audio level control potentiometers for the navigation receivers (MLS, VOR/ILS1, VOR/ILS2, DME1, DME2, ADF1, ADF2, MKR).

(b) The "INT/RAD" toggle switch has 3 positions:

- Steady upper INT position - Steady center OFF position

Spring-loaded lower RAD position.

(c) When the control knob of one audio level control potentiometer is turned to the minimum limit, the related audio output is cut off.

Effectivity: All

Page 27

2 '51-82 19990331


ACP2531(-)

(2) ACP2531ACO1/ACP2531AC02


(a) The front panel of the ACP2531AC01 Audio ControlPanel has the control devices that follow:

- Six transmission keys (VHF1, VHF2, HF, AUX1, AUX2, INT), which are mechanically interlocked. Thus, the pilot cannot push two keys at the same time.

- A INT/RAD 3-position toggle switch for theselection of the Radio/Interphone push-to-talkcontrol.

- Three audio level control potentiometers for the HFand VHF (VHF1, VHF2) communication receivers.

- Two audio level control potentiometers for theauxiliary receivers (AUX1 and AUX2).

- One INT (Interphone) audio level controlpotentiometer.

- Seven audio level control potentiometers for the navigation receivers (VOR/MLS1, VOR/MLS2, DME1, DME2, ADF1, ADF2, MKR).


Steady upper INT position

- Steady center OFF position

- Spring-loaded lower RAD position.


(3) ACP2531AD01


(a) The front panel of the Audio Control Panel has the control devices that follow:

- Six transmission keys (VU1, VHF, INT, PA, HF, VU2), which are mechanically interlocked. Thus, the pilot cannot push two keys at the same time.

- A VOICE key for the selection of a 1020Hz filter.

- A INT/RAD 3-position toggle switch for the selection of the Radio/Interphone push-to-talk control.

Effectivity: All

23Page

200 01313


ACP2531(-)

- Four audio level control potentiometers for the HF, VHF and V/UHF (VU1, VU2) communication receivers.

- One PA (Public Address) audio level controlpotentiometer.


- Seven audio level control potentiometers for the navigation receivers (TAC, VOR1, VOR2, DME1, DME2, ADF, MKR).

- A LOCAL/GENERAL 2-position toggle switch (externalcontrol).






(4) ACP2531AE01



Six transmission keys (VFM1, VFM2, INT, PA, HF, VU2), which are mechanically interlocked. Thus, the pilot cannot push two keys at the same time.

A VOICE key for the selection of a 1020Hz filter.

A INT/RAD 3-position toggle switch for the selection of the Radio/Interphone push-to-talk control.

Four audio level control potentiometers for the HF, VFM (VFM1, VFM2) and V/UHF2 communication

receivers.

One PA (Public Address) audio level controlpotentiometer.

One INT (Interphone) audio level control

potentiometer.

Five audio level control potentiometers for thenavigation receivers (TAC, VOR1, ESM, ADF, DL).

Effectivity: All

23-51-82Page 29

19980630


ACP2531(-)



- Steady upper INT position

Steady center OFF position



(5) ACP2531AF01



Five transmission keys (VFM1, VFM2, INT, HF, VU2), which are mechanically interlocked. Thus, the pilot cannot push two keys at the same time.

A INT/RAD 3-position toggle switch for the selection of the Radio/Interphone push-to-talk control.

Four audio level control potentiometers for the VFM (VFM1, VFM2), HF and V/UHF2 communicationreceivers.








Effectivity: All

Page 30

23-5 1-82 19980630


ACP2531(-)

(6) ACP2531AKO1


(a) The front panel of the ACP2531AK01 Audio ControlPanel has the control devices that follow:

- Six transmission keys (VHF1, VHF2, INT, PA, HF, VU/SAT), which are mechanically interlocked. Thus, the pilot cannot push two keys at the same time.

- A VOICE ONLY key for the selection of a 1020 Hz filter.


- Four audio level control potentiometers for the HF, VHF (VHF1, VHF2) and VU/SAT communicationreceivers.

- One audio level control potentiometer for the sparechannel.

- One PA (Public Address) audio level controlpotentiometer.


Seven audio level control potentiometers for thenavigation receivers (VOR/ILS1, VOR/ILS2, DME1,DME2, ADF1, ADF2, MKR).



Steady center OFF position



Effectivity: All

23-51-82Page

20040229


ACP2531(.)

(7) ACP2531ALO1


(a) The front panel of the ACP2531AL01 Audio ControlPanel has the control devices that follow:

- Six transmission keys (VHF1, VHF2, INT, HF, UHF1, UHF2), which are mechanically interlocked. Thus, the pilot cannot push two keys at the same time.

- A VOICE ONLY key for the selection of a 1020 Hz filter.


- Five audio level control potentiometers for the HF, VHF (VHF1, VHF2) and UHF (UHF1, UHF2) communicationreceivers.


Eight audio level control potentiometers for thenavigation receivers (VOR/ILS1, VOR/ILS2, DME1,DME2, ADF1, ADF2, MKR, TACAN (TAC)).






Effectivity: All

23-51-82P20040229


ACP2531 (-)

( 8) ACP2531BDO1


(a) The front panel of the ACP2531BDO1 Audio ControlPanel has the control devices that follow:

- Six transmission keys (VHF1, VHF2, INT, HF, SPARE,VU2), which are mechanically interlocked. Thus, thepilot cannot push two keys at the same time.

- A VOICE ONLY key for the selection of a 1020 Hzfilter.

- A INT/RAD 3-position toggle switch for theselection of the Radio/Interphone push-to-talk control.

- Four audio level control potentiometers for the VHF1, VHF2, VU1 and VU2 communication receivers.

- One audio level control potentiometer for the spare channel.


Eight audio level control potentiometers for thenavigation receivers (VOR/ILS1, VOR/ILS2, DME1,DME2, ADF1, ADF2, MKR, TAC).






Effectivity: All

23-51-82Page 30-3

20050430


ACP2531(-)

( 9) ACP2531BF01


(a) The front panel of the ACP2531BF01 Audio ControlPanel has the control devices that follow:

- Five transmission keys (VHF1, VHF2, INT, VU1, VU2), which are mechanically interlocked. Thus, the pilot cannot push two keys at the same time.

- A INT/RAD 3-position toggle switch for theselection of the Radio/Interphone push-to-talkcontrol.

Four audio level control potentiometers for theVHF1, VHF2, VU1 and VU2 communication receivers.

One INT (Interphone) audio level control

potentiometer.







Effectivity: All

23-51-82Page

20050430


ACP2531(-)

REVISION REVISION DESCRIPTION SERIAL No.CODE EFFECTIVITY

1 Figure 5 - Sheet 1 : AllAdding of ACP2531 and ACP2531AB04 frontpanel

Figure 5 - Sheet 2 :ACP2531AC01 instead of ACP2531AC

Figure 5 - Sheet 3 :Effectivity: ACP2531AD01 instead ofAC22531AC01

Figure 5 - Sheet 4Effectivity: ACP2531AE01 instead ofAC22531AD01

Figure 5 - Sheet 5Effectivity: ACP2531AF01 instead ofAC22531AE01

3 Figure 5 - Sheet 2 : From SN 2188Adding of version ACP2531AC02 (postSB 2531-23-002)

4 Figure 5 - Sheet 6Adding of version AC22531AK01

Figure 5 - Sheet 7Adding of version ACP2531AL01

5 Figure 5 - Sheet 8Adding of version ACP2531BD01

Figure 5 - Sheet 9Adding of version ACP2531BF01


Effectivity: All

Page

23-51-82 20050430


ACP2531(-)

TRANSMIT KEYS

VHFI VHF2 INT PA HFI HF2

"INTERNAL" OR"VOICE" FILTER "RADIO" PTT SELECTION KEY SELECTION

NT

ONLY IWD 0MLS

VHFI VHF2

r 1 VOR2-1

a

VOLUME ADJUSTMENT POTENTIOMETERS

TRANSMIT KEYS

INT VHF3 HFI HF2

r 1 DME 2-1 r 1 ADF 2

ACP2531ABOI

TRANSMIT KEYS

"INTERNAL" OR"VOICE" FILTER "RADIO" PTTSELECTION KEY SELECTION

VOICE

ONLY RAD 0

MLS

E W

olc

"INTERNAL" OR"VOICE" FILTER "RADIO" PTT SELECTION KEY SELECTION

r1-VOR2-I r1DME2-1 ILS

UD

L VOLUME ADJUSTMENT POTENTIOMETERS

r1ADF2, MKR O

B

1 1 VHFI VHF2

1 1 1 RAD INT PA HFI VHF3 ONLY

ACP2531

r1"VOR 2, r1 DME2-1 ILS, ,�

a


MLS

r 1 ADF2

C(o

ACP2531AB04

ACP2531 / ACP2531AB01 / ACP2531AB04FRONT PANEL

FIGURE 5GRAPHIC GR235182-99B-805-A01

Effectivity: ACP2531 ACP2531ABO1ACP2531AB04


Page 33/3423-51-82 19990331


ACP2531(-)

TRANSMIT KEYS

e)S h�� Q 1 1 4 1 1

"INTERNAL" OR"RADIO" PTTSELECTION

p VHFI VHF2 HF AU X1 AUX2 MY O

(t b b b (t (t O r l VOR 2 1 r 1 DME 2- r l ADF 2 1 MKR O

uL�

0L VOLUME ADJUSTMENT

POTENTIOMETERS

ACP2531AC01 / ACP2531AC02FRONT PANEL

FIGURE 5 - SHEET 2

GRAPHIC GR235182-99B-805-A01

Effectivity: ACP2531AC01I ACP2531AC02

SHEETNBR 02

23-51-82Page 35/36

20030131 a


ACP2531(-)

TRANSMIT KEYS

,O t % 1,1 iF INT PA

% I


VOICE I

TAC

0°C E UD(mI VOR2 LOCAL F 1-DME 2

0

MKR

GENE

VOLUME ADJUSTMENT "LOCAL" /"GENERAL"POTENTIOMETERS SELECTOR SWITCH

ACP2531AD01 FRONT PANEL

0 go

FIGURE 5 - SHEET 3GRAPHIC GR235182-99B-805-A01 SHEETNBR 03

I Effectivity: ACP2531AD01

Page 37/38

23-51-82 19990331

a


ACP2531(-)

0,FMI '

TRANSMIT KEYS

%tjI

2 INT PAA HF


VOICE

I2

L r_ TAC

E TD UDV R1 LOCAL ESM

UD 01DF DL

E


(TDE 0GENE

"LOCAL" / "GENERAL" SELECTOR SWITCH

ACP2531AE01 FRONT PANEL

FIGURE 5 - SHEET 4 ` GRAPHIC GR235182-99B-805-A01 SHEETNBR 04

I Effectivity: ACP2531AE01

Page 39/40

23-51-82 19990331


ACP2531(-)


TRANSMIT KEYS

"LOCAL" / "GENERAL" SELECTOR SWITCH

ACP2531AF01 FRONT PANEL

FIGURE 5 - SHEET 5

"INTERNAL" OR"RADIO" PTT SELECTION


I Effectivity: ACP2531AF01

SHEETNBR 05

Page 41/42

23-51-82 19990331


ACP2531(-)

TRANSMIT KEYS

VHFI VHF2 NT PA

"VOICE" FILTER INTERPHONE ORSELECTION "RADIO" PTT

KEY SELECTION

HF VU/SAT1 1

9 VOR 2,

L_ VOLUME ADJUSTMENTPOTENTIOMETERS

1

r 9 DME 2', r 9

ACP2531AK01 FRONT PANEL

ADF 2

"SPARE"CHANNEL

POTENTIOMETER

FIGURE 5

GRAPHIC GR235182-99B-805-A01

Effectivity: ACP2531AK01


23-51-82 Page 41-1/41-2 20040229


ACP2531(-)

TRANSMIT KEYS

(Ds)VHFI VHF2 INT

1

1 VOR 2-,ILQ


'VOICE" FILTER SELECTION

I KEY

HF UHF1

r 1 ADF 2, MICR

INTERPHONE OR "RADIO" PTTSELECTION

ACP2531ALO1 FRONT PANEL

FIGURE 5

GRAPHIC GR235182-99B-805-A01

Effectivity: ACP2531AL01


23-51-82 Page 420040229


ACP2531(-)

aVHF1

CD

"VOICE" FILTERTRANSMIT KEYS SELECTION

KEY

,VOICE

Ml 1LY

4 � �VHF2 2 ONE V 41 VU2

0 0 a 0

INTERPHONE OR "RADIO" PTTSELECTION

0NT

RAO TAO

1VOILS

2=1 r l CM[ 2

0

JF 2 =i NKRi r

0 0


ACP2531BDO1 FRONT PANEL

FIGUREGRAPHIC GR235182-99B-805-AO1

Effectivity: ACP2531BDO1

5 - SHEET 8 SHEETNBR 08

Page 41-5/41-6

23-51 -82 20050430


ACP2531(-)

TRANSMIT KEYS

I %VHFI VHF2 INT Vul

0 (D QD (ILOCAL

L VOLUME ADJUSTMENT "LOCAL" / "GENERAL"POTENTIOMETERS SELECTOR SWITCH

ACP2531BF01FRONT PANEL

FIGURE 5 - SHEET

GRAPHIC GR235182-99B-805-A01 SHEETNBR

Effectivity: AC22531BF01

"INTERNAL" OR"RADIO" PTT SELECTION

IVU2 RADO

1

G

0

909

Pag° 4

23-51-82 20050430

C


ACP2531(-)

TASK TA235182-869-802-AO1

2. OPERATION

A. GENERAL

(Refer to Figure 6)

(1) Function

The Audio Control Panel changes the status of the front panel control devices into logic signals. These signals are then changed into control words, which are transmitted in serial mode to the Remote Control Audio Unit. The control words are transmitted at a frequency of 12 kHz through a line that agrees with the ARINC 429 standard.

The Audio Control Panel has three functions

- For each potentiometer, it supplies a digital code that is a function of the audio volume adjustment.

- For each front panel switch or key, it supplies a digital code that is a function of the position of the related switch or key.

- It transmits ARINC 429 messages to the Remote ControlAudio Unit.

(2) Composition

The Audio Control Panel has the circuit boards that follow:

Main board

- Keyboard board

- Lighting circuit board.

Effectivity: All

23-51-82Page 43

19980630


ACP2531(-)



Effectivity: All

23-51-82


Page 44 19980630


ACP2531(-)

r-----------------------------------

CLOCK

INPUT

VOLUME CONTROL

POTENTIOMETER

--.

KEYBOARD BOARD

INTERFACE

A/D +5V CONVERTER

MULTIPLEXER

MICRO-CONTROLLER

SWITCHESINTERFACE

+5V

MAIN BOARD

r----------,

FRONT PANEL LIGHTING

BOARD

GENERAL BLOCK DIAGRAM FIGURE 6

WATCHDOG RESET

OUTPUTINTERFACE

+15V-15V

RESET

+5V

INTERNAL POWER SUPPLY

TORCAU

28 VDC

5V LIGHTING

GRAPHIC GR235182-99B-806-A01 Effectivity: All

SHEETNBR 01

23-51-82 Page 45 19980630


ACP2531(-)

(3) The Main board of the Audio Control Panel contains theelectronic circuits that follow:

- Potentiometers interface

- Switches interface

- Central Processing Unit

- Internal power supply

- Arinc transmission.

( 4) The keyboard board holds the transmission keys and the INT/RAD switch. This board also contains the VOICE ONLY key in the ACP versions that follow:

- ACP2531/ACP2531AB01/ACP2531AB04

- ACP2531AD01

- ACP2531AE01

- ACP2531AK01

- ACP2531AL01

- ACP2531BDO1.

The Keyboard board is connected to the main board through a ribbon cable.

( 5) The Lighting circuit board contains the front panel

lamps. These lamps are supplied with dc power ( 5VDC) fromthe Main board.

B. DETAILED DESCRIPTION

(Refer to Figure 6)

( 1) Potentiometers Interface

The Main board supplies a reference voltage (+5VDC) to the audio level adjustment potentiometers, which are attached on the chassis. The analog voltage on each potentiometer wiper is a function the potentiometer position.

The analog voltages from the potentiometers wipers are transmitted to an analog-to-digital converter (A/D) . This

converter transmits to the microcontroller a 8-bitparallel word for each potentiometer analog voltage.

Effectivity: All

23-51 82200550430


ACP2531(-)

(2) Switches Interface

The control signals are continuously available on the keyboard through contacts.

The Main Board receives these logic signals from the Keyboard Board. These signals are transmitted to the microcontroller through impedance adapters.

(3) Central Processing Unit

(a) The Central Processing Unit of the Main Board has the circuits that follow:

- Microcontroller

- Master clock

- RESET circuit

- Watchdog circuit.

(b) The microcontroller receives the digital input signals that follow from:

- The Analog-to-Digital converter (referparagraph 2.B.(1))

- The impedance adapters (referparagraph 2.B.(2)).

It sends, in serial mode, the related digital outputsignals to the output interface circuit.

(c) The master clock uses a 4 MHz crystal. It sends the

time signals necessary for the operation of themicrocontroller.

(d) The RESET circuit clears the microcontroller each time the ACP is energized.

Effectivity: All

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ACP2531(-)

(e) Watchdog

The watchdog circuit has the circuits that follow:

- Counter Clock.

When the microcontroller operates correctly, it sends a reset signal to the watchdog counter at constant intervals of time.

In case of malfunction, the transmission of the reset signal is stopped. Then, there is a watchdog counter overflow. In this condition, the watchdog circuit sends a reset signal to the microcontroller.

(4) Internal Power Supply

The internal power supply circuit has the primary components that follow:

- Voltage regulator - Hybrid voltage inverter.

The internal power supply circuit uses the 28V regulatedinput to supply the +15V and -15V voltages necessary forthe ARINC signals.

The voltage regulator also supplies the + 5 VDC voltagenecessary for the electronic circuits.

(5) Output Interface

The output interface has the components that follow:

- Two amplifiers

Four transistors.

Effectivity: All

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19980630


ACP2531(-)

This circuit uses the microcontroller logic signal outputs to supply electrical signals which agree with the ARINC 429 standard.

ILLUSTR 1L235182-99C-801-A01

19.5V<_dV:5 20.5V 5ps_<Tm<15ps 5ps_Td515ps 39.5ps:5 X<43.8 ps 81.2ps<Y:5 85.4ps IVAVB1_:502V

The electrical output signal from the ACP is supplied in differential mode through two buses to the Remote Control Audio Unit.

C. ARINC MESSAGES

(1) Message Contents

The microcontroller makes the ARINC message. Each message contains 17 words (refer to Figure 3). Each word contains the data that correspond to the status of one of the control devices that follow:

- Switches

- Keyboard

- Potentiometers.

Effectivity: All

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ACP2531(-)

The time interval from the beginning of one word to thebeginning of the next word is equal to 10 msec.

ILLUSTR 1L235182-99C-802-A01

i t2 t3

1ST WORD

1

32 BITS PER WORD

all -2ND WORD

ti =10 msec.

With a transmission rate of 12 kHz, the basic bit widthis:

1/12 kHz = 83.3 psec.

The ARINC word width is thus:

t2 = 83.3 psec. x 32 = 2.67 msec.

Idle time t3, equal to t1 - t2, is:

t3 = 10 - 2.67 = 7.33 msec.

During time interval t3, the status of all the frontpanel control devices (transmission keyboard, audiolevel, etc.) is transmitted to the microcontroller.

In time interval t3 between word (n-1) and word (n) thedata contents of one word (X) may change. In thiscondition, word X (known as isolated word), istransmitted at the end of time interval t3.

ILLUSTR 1L235182-99C-803-A01t3 t3 t3

I I I 1 j I1 t

WORD WORD(n-2) (n-11

1

L

-

1 I 1

ISOLATE SOLATED WORDWORD (n)

I WORD(X)(X1 L

CHANNEL CHANGE

Isolated word (X) is transmitted until there is no morechange in the related channel (Xl).

Effectivity: All

Page 5023-5 1 -$2 20001015


ACP2531(-)

If the time of the channel change is more than 200 msec., the subsequent message is transmitted.

ILLUSTR 1L235182-99C-804-A01200 msec.

ISO-LATE WORD

ISO- WORDLATE 1 WORD..® . "

I

IRECURRENT MESSAGE

(2) Contents of a Word

(X) (X)

ISOLATED WORD NEW RECURRENT MESSAGE

The 32 bits of a word are stored in four bytes:

- The first byte contains the word label.

- The second byte contains the PTT data.

- The third byte contains the keyboard or audio level data.

- The fourth byte contains the self-test bits.

Effectivity: All

Page 51/52 9980630

1


ACP2531(-)

TESTING AND TROUBLESHOOTING

TASK TA235182-700-801-AO1

1. GENERAL

A. FUNCTION

The function of this section is:

- To find the faults that are the cause of the equipment removal.

- To find the defective sub-assembly for replacement or repair.

- To give the general test procedure to be done after repair.

WARNING : OBEY ALL THE SAFETY PRECAUTIONS WHEN YOU DO MAINTENANCE ON OR NEAR ELECTRICAL/ELECTRONIC EQUIPMENT. IF YOU DO NOT DO THIS, YOU CAN CAUSE INJURIES TO PERSONS AND/OR DAMAGE TO THE EQUIPMENT.

CAUTION : OBEY ALL THE ELECTROSTATIC-DISCHARGE SAFETY PRECAUTIONS WHEN YOU DO MAINTENANCE ON OR NEAR ELECTROSTATIC-DISCHARGE SENSITIVE DEVICES. IF YOU DO NOT DO THIS, YOU CAN CAUSE DAMAGE TO THE EQUIPMENT.

B. TEST EQUIPMENT

( 1) ACP2531/ACP2531ABO1/ACP2531AB04/ACP2531AKO1/ACP2531ALO1/ACP2531BDO1

- BE3507AA01 test bench

- DC Power supply ( 0/30V - lA)

- DC power supply ( 0/5V)

- Oscilloscope type TEKTRONIX TDS 420

- 0-3A DC ammeter type KEITHLEY 196

- AC ammeter

- Multimeter type FLUKE 8060A

Effectivity: All

23-51-82P 20050430


ACP2531(-)

(2) ACP2531ACO1/ACP2531AC02/ACP2531ADO1/ACP2531AEO1/ACP2531AF01/ACP2531BF01

- BE3507AAO1 test bench

- BE3507ABO1 test bench

- DC power supply ( 0/30V - 1A)

- DC power supply ( 0/5V - 3A)

- Oscilloscope type TEKTRONIX TDS 420

- 0-3A DC ammeter type KEITHLEY 196

- AC ammeter

- Multimeter type FLUKE 8060A

- Milliohmmeter type SEFELEC RCP2-JE or equivalent.

Effectivity: All

23-51-82P20050430


ACP2531(-)

TASK TA235.182-760-801-AO1

2. TEST OF THE ACP2531/ACP2531ABO1/ACP2531AB04/ACP2531AK01/ACP2531AL01

SUBTASK SU235182-760-001-A01

A. TEST CONNECTIONS

(refer to Figure 1001, sheet 1)

- Make sure that the external 28VDC power supply unit is off.

- Connect a ammeter between the test bench and the 28VDCpower supply unit (respect the polarities).

- Connect the BE3507AA01 bench to the Audio Control Panel tobe tested.

SUBTASK SU235182-760-002-AO1

B. POWER CONSUMPTION

- Disconnect the test bench from the ACP.

- Set the ON/OFF switch of the external 28VDC power supplyunit to ON.

- Read the value I1 of the current on the ammeter.

- Set the ON/OFF switch of the external 28VDC power supplyunit to OFF.

- Connect the test bench to the ACP.

- Set the ON/OFF switch of the power supply unit to ON.

- Read the value 12 of the current on the ammeter.

- Make sure that the difference 12consumption) is less than 200 mA.

Effectivity: ACP2531 ACP2531ABOlACP2531AB04 ACP2531AK01ACP2531ALO1 23-51-82

- I1 (ACP power

Page 1003 20040229


ACP2531(-)

SUBTASK SU235182-760-003-AO1

C. TEST OF THE TRANSMISSION CHANNELS

NOTE: If the "ERROR" message shows during this procedure, do the procedure given in paragraph 2.C.(2).

(1) Procedure

(a) ACP2531, ACP2531ABO1 and ACP2531AB04- Push the VHF1 key on the ACP transmission keyboard. - Make sure that "COM1" shows on the test bench

display. - Push the VHF2 key on the ACP transmission keyboard. - Make sure that "COM2" shows on the test bench

display. - Push the INT key on the ACP transmission keyboard. - Make sure that "INT" shows on the test bench

display. Push the HF1 key on the ACP transmission keyboard.

- Make sure that "COM3" shows on the test bench display.

(b) ACP2531ABOl only - Push the VHF3 key on the ACP transmission keyboard. - Make sure that "PA" shows on the test bench

display. - Push the HF2 key on the ACP transmission keyboard

display.- Make sure that "COM4" shows on the test bench

display.

(c) ACP2531AB04 only

- Push the PA key on the ACP transmission keyboard.- Make sure that "PA" shows on the test bench

display.- Push the VHF3 key on the ACP transmission keyboard


display.

(d) ACP2531 only- Push the PA key on the ACP transmission keyboard.- Make sure that "PA" shows on the test bench

display.- Push the HF2 key on the ACP transmission keyboard


display.

Effectivity: ACP2531 ACP2531ABOl ACP2531AB04ACP2531AK01 ACP2531AL01 23-51-82

Page 1004 20040229


ACP2531(-)

(e) ACP2531AK01 only

- Push the VHF1 key on the ACP transmission keyboard. - Make sure that "COM1" shows on the test bench

display.

- Push the VHF2 key on the ACP transmission keyboard. - Make sure that "COM2" shows on the test bench

display. - Push the INT key on the ACP transmission keyboard. - Make sure that "INT" shows on the test bench

display. - Push the PA key on the ACP transmission keyboard. - Make sure that "PA" shows on the test bench

display. - Push the HF key on the ACP transmission keyboard. - Make sure that "COM3" shows on the test bench

display. - Push the VU/SAT key on the ACP transmission

keyboard display. - Make sure that "COM4" shows on the test bench

display.

(f) ACP2531AL01 only

- Push the VHF1 key on the ACP transmission keyboard. - Make sure that "COMi" shows on the test bench

display. - Push the VHF2 key on the ACP transmission keyboard. - Make sure that "COM2" shows on the test bench

display.

- Push the INT key on the ACP transmission keyboard. - Make sure that "INT" shows on the test bench

display.

- Push the HF key on the ACP transmission keyboard. - Make sure that "PA" shows on the test bench

display.

- Push the UHF1 key on the ACP transmission keyboard. - Make sure that "COM3" shows on the test bench

display. - Push the UHF2 key on the ACP transmission keyboard


display.

(g) Release all the keys.

(h) Make sure that there is no message on the test bench display.

Effectivity: ACP2531 ACP2531ABOl ACP2531AB04ACP2531AK01 ACP2531AL01 23-51- Page 1004-1/1004-2

82


ACP2531(-)

(2) "ERROR" Message

(a) If the "ERROR" message shows on the test bench display, you must push the RESET key on the test bench.

(b) If the "ERROR" message shows again:

- Push the "ERROR" key on the test bench.

- Examine the different pages to find the fault.

- If there is no fault in transmission mode, push the "RETURN" key on the test bench, and continue the test.

- If there is a fault, refer to paragraph 2.K.

SUBTASK SU235182-760-004-A01

D. TEST OF THE RADIO/INTERPHONE PTT COMMAND

NOTE: If the "ERROR" message shows during this procedure, do the procedure given in paragraph 2.C.(2).

(1) RAD/INT set to RAD

(a) Set the RAD/INT switch of the ACP to "RAD", and keep the switch in position.

(b) With the "+" or "-" key of the test bench, do the selection of the VHF1 transmission channel.

(c) Make sure that "RAD" shows on the display unit.

(d) Do the same procedure for the adjustable channels that follow:

- VHF2 - VHF3 (ACP2531AB01 and ACP2531AB04)- INT- PA (ACP2531, ACP2531AB04 and ACP2531AK01)- HF1 or HF (ACP2531AK01 and ACP2531AL01)- HF2 (ACP2531- MLS or spare- VOR1, VOR2- DME1, DME2- ADF1, ADF2- MKR.

Effectivity: ACP2531 ACP2531ABO1ACP2531AB04 ACP2531AK01ACP2531AL01

and ACP2531AB01)(ACP2531AK01) or TAC

23-51-82

(ACP2531AL01)

Page 1005 20040229


ACP2531(-)

(2) RAD/INT set to the middle position

(a) Set the RAD/INT switch of the ACP to the middle position.

(b) With the "+" or "-" key of the test bench, do the selection of the VHF1 reception channel.

(c) Make sure that "RAD" and "INT" messages do not show on the display unit.

(d) Do the same procedure for the other channels, using keys "+" and "-" of the test bench.

( 3) RAD/INT set to "INT"

(a) Set the RAD/INT switch of the "INT" position.

(b) With the "+" or "-" key of the test bench, do the selection of the VHF1 reception channel.

(c) Make sure that "INT" shows on the display unit.

(d) Do the same procedure for the other channels, using keys "+" and "-" of the test bench.

SUBTASK SU235182-760-005-AO1

E. TEST OF THE VOICE ONLY COMMAND

(1) Push the VOICE ONLY key on the ACP front panel.

(2) With the "+" or "-" key of the test bench, do theselection of the VHF1 reception channel.

(3) Do the same procedure for the other channels, using keys"+" and "-" of the test bench.

SUBTASK SU235182-760-006-AOI

F. TEST OF THE RECEPTION CHANNELS

NOTE: If the "ERROR" message shows on the test bench display, refer to paragraph 2.F.(2).

(1) Procedure

(a) Set all the front panel potentiometers to minimum.

Effectivity: ACP2531 ACP2531ABOl ACP2531AB04ACP2531AK01 ACP2531AL01 23-51-82

Page 1006 20040229


ACP2531(-)

(b) On the test bench, do the selection of the VHF1 reception channel.

(c) Make sure that the VHF1 data (COM1 channel) is at"00" or "O1" on the display unit.

(d) Do the same procedure for the channels that follow:

- VHF2- HF1- HF(ACP2531AK01)- UHF1(ACP2531AL01)- INT- VHF3 (ACP2531AB01)- PA (ACP2531, ACP2531AB04

PA channel- HF (ACP2531AL01)

: COM2 channel: COM3 channel : COM3 channel : COM3 channel: INT channel: PA channel

and ACP2531AK01):

: PA channel - HF2 (ACP2531 and ACP2531AB01) : COM4 channel- VHF3 (ACP2531AB04) : COM4 channel- VU/SAT (ACP2531AK01) : COM4 channel- UHF2 (ACP2531AL01) : COM4 channel- MLS : NAV1 channel- SPARE (ACP2531AK01) : NAV1 channel- TAC (ACP2531AL01) : NAV1 channel- VOR1/ILS1 : NAV2 channel- VOR2/ILS2 NAV3 channel- DME1 : NAV4 channel- DME2 : NAV5 channel- ADF1 : NAVE channel- ADF2 : NAV7 channel- MKR : NAV8 channel.

(e) Gradually turn each potentiometer to maximum.

(f) For each potentiometer, make sure that the data is at255 or 254 on the display unit.

(2) "ERROR" Message

(a) If the "ERROR" message shows on the test bench display, you must push the RESET key on the test bench.

(b) If the "ERROR" message shows again-

- Push the "ERROR" key on the test bench.

- Examine the different pages to find the fault.

Effectivity: ACP2531 ACP2531AB0l ACP2531AB04ACP2531AK01 ACP2531AL01 23-51-82 Page 1007

20040229


ACP2531(-)

- If there is no fault in reception mode, push the "RETURN" key on the test bench, and continue the test.

- If there is a fault, refer to paragraph 2.K.

SUBTASK SU235182-760-007-AO1

G. TEST OF THE ARINC 429 LINK

NOTE: If the "ERROR" message shows on the test bench display, refer to paragraph 2.C.(2).

(1) Output Voltage

- Connect the oscilloscope across terminals A and B of the test bench. Use the oscilloscope differential inputs.

- Make sure that the terminals are not connected to the ground.

- On the test bench, set the "LOAD" switch to the "down" position.

- Make sure that the measured signal agrees with the diagram that follows:

ILLUSTR IL235182-99C-820-AO1

Tm Td

Y

Effectivity: ACP2531 ACP2531ABOlACP2531AB04 ACP2531AK01 ACP2531AL01

X VA

VB

F \_/

19.5VSdV520.5V5ps5 Tm5 15ps 5ps5 Td5 15ps39.5 pss X5 43.8 ps81.2pss YS 85.4ps OVA-VBI 50.2 V

Page 100823-51-82 20040229


ACP2531 (-)

(2) Line Current

- Connect the oscilloscope differential inputs between terminals A and B of the test bench.

- Make sure that the terminals are not connected to the ground.

- On the test bench, set the "LOAD" switch to the "u position.

- Measure the voltage at the resistor terminals. This voltage is a function of the line current.

- Make sure that the shape of measured signal agrees with the diagram of paragraph 2.G.(1). The peak-to-peak voltage must be approximately equal to 11.1 V.

- Disconnect the oscilloscope.

- Connect an AC ammeter across terminals A and B.

- Make sure that the current is less than 20 mA.

SUBTASK SU235182-760-008-AO1

H. FRONT PANEL LIGHTING

- Connect a 5VDC power supply across terminals "5V" and "0V" of the test bench and insert an ammeter.

- Set the 5V power supply unit to ON.

- Make sure that the lighting is constant on all. the front panel surface.

- Make sure that the consumption is of between 480 mA and720 mA.

Effectivity: ACP2531ACP2531ABOlACP2531AB04ACP2531AK01 Page 1009

ACP2531AL01

23-51-82 20040229


ACP2531(-)

SUBTASK SU235182-760-009-AO1

J. BONDING TEST

Not applicable

SUBTASK SU235182-760-010-AO1

K. ERROR MESSAGES

There are five different error messages contained in the "error page". These messages are given in the table that follows:

ERROR MESSAGE

"NO RECEPTION"

"BAD RECEPTION"

"EMISSION ERROR"

"CONVERSION ERROR"

"ACP SELF TEST ERROR"

Effectivity: ACP2531 ACP2531ABO1ACP2531AB04 ACP2531AK01

DESCRIPTION

The test bench does not receive the ARINC words.

The test bench receives incorrect ARINC words.

The label or the transmission codeof the ARINC word is incorrect.

The Analog-to-Digital conversion isincorrect

The "error bit" is set to 1 in the ARINC words

Page 1010ACP2531AL01 23-51-82 20040229


ACP2531(-)

TASK TA235182-760-802-A01

3. TEST OF THE ACP2531AC01/ACP2531AC02

SUBTASK SU235182-760-011-A01

A. POWER CONSUMPTION


- Make sure that the external 28VDC power supply unit is off.

- Connect a ammeter between the BE3507AA01 test bench and the28VDC power supply unit (respect the polarities).

- Read the value Ii of the current on the ammeter.

Set the ON/OFF switch of the external 28VDC power supplyunit to OFF.

- Connect the BE3507AB01 test bench to the BE3507AA01 testbench.

- Connect the ACP2531AC01/02 to be tested to the BE3507ABOltest bench.

- On the BE3507ABOl test bench, set the switch to "A".

- On the ACP2531AC01/02, set the RAD/INT switch to "RAD".

- Set the ON/OFF switch of the power supply unit to ON.

- Read the value 12 of the current on the ammeter.

- Make sure that the difference 12 - I1 (ACP powerconsumption) is less than 200 mA.

SUBTASK SU235182-760-012-AO1

B. TEST OF THE TRANSMISSION CHANNELS

NOTE: If the "ERROR" message shows during this procedure, do the procedure given in paragraph 3.B.(2).

(1) Procedure

- Push the VHF1 key on the ACP transmission keyboard.

Make sure that "COM1" shows on the test bench display.

- Push the VHF2 key on the ACP transmission keyboard.

- Make sure that "COM2" shows on the test bench display.

- Push the HF key on the ACP transmission keyboard.

Effectivity: ACP2531AC01 ACP2531AC02

23-51-V2P20030131

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