Ver 1.0 1999.09

MICROFILM

PMC-DR50L/DR70LSERVICE MANUAL

PERSONAL COMPONENT SYSTEM

SPECIFICATIONS

TAPE Model Name Using Similar Mechanism NEW

Section Tape Transport Mechanism Type MF-PMCDR50

CDModel Name Using Similar Mechanism NEW

SectionMD Mechanism Type KSM-213CCP

Optical Pick-up Type KSS-213C

– Continued on page 2 –

AEP ModelUK Model

E ModelPMC-DR50L/DR70L

Tourist ModelPMC-DR50L

Photo : PMC-DR70L

– 39 – – 41 –– 40 –

5-5. SCHEMATIC DIAGRAM – MAIN SECTION (1/3) –

PMC-DR50L/DR70L

Note:• All capacitors are in µF unless otherwise noted. pF: µµF

50 WV or less are not indicated except for electrolyticsand tantalums.

• All resistors are in Ω and 1/4 W or less unless otherwise

specified.• ¢ : internal component.• U : B+ Line.• H : adjustment for repair.• Voltages and waveforms are dc with respect to ground

under no-signal (detuned) conditions.no mark : FM( ) : MW< > : LW

• Voltages are taken with a VOM (Input impedance 10 MΩ).Voltage variations may be noted due to normal produc-tion tolerances.

• Waveforms are taken with a oscilloscope.Voltage variations may be noted due to normal produc-tion tolerances.

• Circled numbers refer to waveforms.• Signal path.F : FMf : MWL : LW

r Waveforms – MAIN SECTION (1/3) –

r Refer to page 74 for IC Block Diagram.

1

IC3 @¡

2

VOLT/DIV : 0.5 V ACTIME/DIV : 5 msec

IC4 !¢VOLT/DIV : 0.2 V ACTIME/DIV : 50 nsec

1.5Vp-p

75kHz

556mVp-p

4.332MHz

– 42 – – 44 –– 43 –

PMC-DR50L/DR70L

5-6. SCHEMATIC DIAGRAM – MAIN SECTION (2/3) – r Refer to page 74 for IC Block Diagrams. r Refer to page 45 for Waveforms. r Refer to page 45 for Notes.

– 45 – – 47 –– 46 –

5-7. SCHEMATIC DIAGRAM – MAIN SECTION (3/3) – PMC-DR50L/DR70L

Note on Schematic Diagram – Main Section (3/3) – :Note:• All capacitors are in µF unless otherwise noted. pF: µµF

50 WV or less are not indicated except for electrolyticsand tantalums.

• All resistors are in Ω and 1/4 W or less unless otherwisespecified.

• U : B+ Line.• Voltages are dc with respect to ground under no-signal

(detuned) conditions.no mark : FM

• Voltages are taken with a VOM (Input impedance 10 MΩ).Voltage variations may be noted due to normal produc-tion tolerances.

• Signal path.F : FMc : digital out

Note on Schematic Diagram – Main Section (2/3) – :Note:• All capacitors are in µF unless otherwise noted. pF: µµF

50 WV or less are not indicated except for electrolyticsand tantalums.

• All resistors are in Ω and 1/4 W or less unless otherwisespecified.

• U : B+ Line.• H : adjustment for repair.• Voltages and waveforms are dc with respect to ground

under no-signal (detuned) conditions.no mark : COMMON (REC)( ) : PLAY

• Voltages are taken with a VOM (Input impedance 10 MΩ).Voltage variations may be noted due to normal produc-tion tolerances.

• Waveforms are taken with a oscilloscope.Voltage variations may be noted due to normal produc-tion tolerances.

• Circled numbers refer to waveforms.• Signal path.F : FME : PBa : RECJ : CD

1

2

L301

Q301 C

ATT : 1/10VOLT/DIV : 1V ACTIME/DIV : 5 µsec

VOLT/DIV : 5 V ACTIME/DIV : 5 µsec

60Vp-p

57kHz

15Vp-p

57kHz

r Waveforms – MAIN SECTION (2/3) –

– 51 – – 52 – – 54 –– 53 –

PMC-DR50L/DR70L5-9. SCHEMATIC DIAGRAM – CD SECTION –

Note:• All capacitors are in µF unless otherwise noted. pF: µµF

50 WV or less are not indicated except for electrolyticsand tantalums.

• All resistors are in Ω and 1/4 W or less unless otherwise

specified.

Note: The components identified by mark ! or dottedline with mark ! are critical for safety.Replace only with part number specified.

• U : B+ Line.• Voltages and waveforms are dc with respect to ground

under no-signal (detuned) conditions.no mark : CD STOP( ) : CD PLAY

• Voltages are taken with a VOM (Input impedance 10 MΩ).Voltage variations may be noted due to normal produc-tion tolerances.

• Waveforms are taken with a oscilloscope.Voltage variations may be noted due to normal produc-tion tolerances.

• Circled numbers refer to waveforms.• Signal path.J : CDc : digital out

r Refer to page 55 for Waveforms.r Refer to page 75 -76 for IC Block Diagrams.

– 57 – – 58 –– 55 – –56 –

PMC-DR50L/DR70L5-10. SCHEMATIC DIAGRAM – CONTOROL SECTION –

Note:• All capacitors are in µF unless otherwise noted. pF: µµF

50 WV or less are not indicated except for electrolyticsand tantalums.

• All resistors are in Ω and 1/4 W or less unless otherwise

specified.• U : B+ Line.• Voltages and waveforms are dc with respect to ground

under no-signal (detuned) conditions.no mark : RADIO (COMMON)( ) : CD< > : REC[ ] : PLAY

• Voltages are taken with a VOM (Input impedance 10 MΩ).Voltage variations may be noted due to normal produc-tion tolerances.

• Waveforms are taken with a oscilloscope.Voltage variations may be noted due to normal produc-tion tolerances.

• Circled numbers refer to waveforms.

r Waveforms (CD SECTION)

1

IC701 #£(RFO)

2

3

4

5

6

VOLT/DIV : 0.5 V ACTIME/DIV : 1 µsec

IC701 6(FEO)

IC701 $∞(TO)

IC751 @ª(PCO)

IC751 #ª, $º(LRCK)

IC751 &¡(XTAO)

VOLT/DIV : 1 V ACTIME/DIV : 1 msec

VOLT/DIV : 20mV ACTIME/DIV : 1 msec

VOLT/DIV : 0.5 V ACTIME/DIV : 5 µsec

VOLT/DIV : 1 V ACTIME/DIV : 5 µsec

VOLT/DIV : 0.1V ACTIME/DIV : 20 nsec

1.0 – 1.5Vp-p

0.6Vp-p

0.7Vp-p

875mVp-p

0.1162MHz8.6 µsec

4.7Vp-p

22.85 µsec

271mVp-p

16.9344MHz

(PLAY MODE)

(PLAY MODE)

(PLAY MODE)

r Waveforms – CONTROL SECTION –

1

IC801 $™

2

VOLT/DIV : 1V ACTIME/DIV : 10 µsec

IC801 $ºVOLT/DIV : 0.5V ACTIME/DIV : 50 nsec

4.8Vp-p

32.768kHz

2.5Vp-p

8MHz

– 65 – – 67 –– 66 –

5-13. SCHEMATIC DIAGRAM – AMP SECTION –

PMC-DR50L/DR70L

Note:• All capacitors are in µF unless otherwise noted. pF: µµF

50 WV or less are not indicated except for electrolyticsand tantalums.

• All resistors are in Ω and 1/4 W or less unless otherwise

specified.• 2 : nonflammable resistor.

Note: The components identified by mark ! or dottedline with mark ! are critical for safety.Replace only with part number specified.

• U : B+ Line.• Voltages are dc with respect to ground under no-signal

(detuned) conditions.no mark : FM

• Voltages are taken with a VOM (Input impedance 10 MΩ).Voltage variations may be noted due to normal produc-tion tolerances.

• Signal path.F : FM

– 71 – – 73 –– 72 –

5-15. SCHEMATIC DIAGRAM – WOOFER AMP SECTION – (DR70L ONLY)

PMC-DR50L/DR70L

Note:• All capacitors are in µF unless otherwise noted. pF: µµF

50 WV or less are not indicated except for electrolyticsand tantalums.

• All resistors are in Ω and 1/4 W or less unless otherwise

specified.• U : B+ Line.• Voltages are dc with respect to ground under no-signal

(detuned) conditions.no mark : FM

• Voltages are taken with a VOM (Input impedance 10 MΩ).Voltage variations may be noted due to normal produc-tion tolerances.

• Signal path.F : FM

r Refer to page 76 for IC Block Diagram.

– 74 – – 76 –– 75 –

PMC-DR50L/DR70L

r IC Block Diagrams – MAIN SECTION (2/3) –IC301 TA2068N

23 22 21

4 5 6321

2024

7dB

LOGIC

ALC1

DET26dB

151617

987 10 11 12

1819 14 13

7dB

ALC2

26dB

15k6k 6k10k

10k

10k

10k

10k

10k

10k

10k

10k 10k 10k10k

10k 10k1k 1k

1k

1k

LINE

RADI

O

RADI

OTA

PE

TAPETAPE

L.RA

D

MIC

I/EX

L.CD

RADI

O

R.CD

TAPE

R.RA

D

MIC

REC

L.LO

R.LO

VCC

LINE

TAPE

BUF AMPA2

BUF AMPB1

BUF AMPB2

BUF AMPA1 MIC

AMP1MUTE

MUT

E

MUT

E

ON

ON ON

NABAMP2

MONITORAMP

MONITORAMP

NABAMP1

RECAMP2

RECAMP1

REF AMP 2.1

L.PO

L.NF

L.RO L.IN

R.IN

R.RO

R.NF

R.PO MIC NFREF

GND

AGC

IC302 BH3854AFS

IC305 BA338

BIN1

BVO1

TIN1

TVO1

AGND IN

1

NF2

BVN1

OUT1

VCC SC

PORT

1

DGND

BIN2

BVO2

TIN2

TVO2

OUT2

VC TC BC CLK

DATA

LATC

H

VREF

28

DVN2

29

NF2

30

IN2

31

FILT

ER

32

4321

27 26 25 24 23 20 19 18 17

5 6 7 8 9 10 11 12 13 14 15 16

22 21

TONE

TONE

CONTROLMATRIXSURROUND

VR

VR

PORT

2

PORT

3

PORT

4

9 8 7 6 5 4 3 2 1

S

RQB+

COMPARATOR

COMPARATOR

COMPARATOR

F.F.

PRE AMP

VCC

OUT

NOIS

E FI

LTER

MUT

ING

GND

NFB

IN SENS

E TI

MIN

GPU

LSE

WID

TH

r IC Block Diagrams – CD SECTION –

IC701 CXA1992BR

Chargeup

FEO FEI

FDFC

T

FGD

FLB

FE_O FE

-

SRCH TG

U

TG2

FSET TE

-

TEO

SL+

SL-

SLO

ISET

VCCVCC

LOCK

CLK

XLT

DATA

XRST

C. OUT

SENS1

SENS2

FOK

CC2

CC1

CBCPRFI

RFO

RF-

RFTC

LDPDPD1

PD2

F. BIAS

F

E

EI

GND

TO

LPFI

TI

ATSC

TZC

VC

FZC

TM2VEEVEE

TM3 TM5

TM4 TM6

VCC VCC

TM7

ISET

TTL↓IIL

IIL↓

TTL

IIL↓

TTL

IIL DATA REGISTER,INPUT SHIFT REGISTER,ADDRESS DECODER,SENS SELECTOR,OUTPUT DECODER

DFCTO IFB1-6BAL1-4TOG1-4

FS1-4 TG1-2 TM1-7 PS1-4

FOHFOLTGHTGL

BALHBALLATSC

TZCFZC

FSETTG2

VEE

VCC

FS1

FS2

FOCUSPHASE COMPENSATION

DFCT

FS4

TRACKING PHASE COMPENSATIONTG1

TM1DFCT

FZC COMP.

VEEVCC

VCCTDFCT

TZC COMP.

ATSCWINDOWCOMP.

E-F BALANCEWINDOW COMP.

TRK. GAINWINDOW COMP.

FO. BIASWINDOW COMP.

VEETGFL

TOG1

TOG2

TOG3

TOG4

BAL1

BAL2

BAL3

BAL4 IF

B1

IFB2

IFB3

IFB4

IFB5

IFB6

FE AMP

VEE

E IV AMP

F IV AMP

VCC

APCVCC

VEE

LASER POWER CONTROL

VEE

PD1 IVAMP

PD2 IVAMP

RF SUMMING AMP

VCC

VEE

VEELEVEL S VEE

MIRRVCC

DFCT

FOK

VCC

LDON

LPCL

LPC

TGFL

MIR

R

DFCT

1

CC1

1 2 3 4 5 6 7 8 9 10 11 12 13

26

39

40

41

42

43

44

45

46

47

48

49

50

51

52

38 37 36 35 34 33 32 31 30 29 28 27

24

24

23

22

21

20

19

18

17

16

15

14

IC702 BA6898FP

D

LEVEL SHIFT

2728 26 25 24 23

21 3 4 5 6 7 8 9 10 11 12 13 14

LEVEL SHIFT

T. S. D.

REGULATOR, BIAS,T. S. D. MONITOR

D D

18 17 16 15

LEVEL SHIFT

D

22

D D

LEVEL SHIFT

D D

DRIVERMUTE

VCC

21 20 19

VCCNC

GND

F- F+ FIN

NC VREF

I

VCC

VCC

NC TIN

T- T+ NC SPIN

SL-

SL+

SLIN

RST

REG

–B

REGD

MUT

E

GND NC SIN

SP-

SP+

GND

SPO

IC751 CXD2589Q

CLOCKGENERATOR

OSC

PWM

ASYMMETRYCORRECTOR

DIGITALPLL

SERVOAUTO

SEQUENCER

EFMDEMODULATOR

SUB CODEPROCESSOR

TIMINGLOGIC

CPUINTERLACE

ERRORCORRECTOR

16KRAM

D/AINTERFACE

DIGITALOUT

DIGITALCLV

SERIAL-ININTERFACE

OVER SAMPLINGDIGITAL FILTER

3rd-ORDERNOISE SHAPER

PWM

60

6162

63

64

656667686970

71

72

73

747576

77

78

79

80

59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41

40

39

38

37

36

35

34

33

32

31

30

29

28

27

2625

24

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20

23

22

21

VSS

LMUT

ERM

UTE

SQCK

SQSO

SENS

DATA

XLAT

CLOK

SEIN

CNIN

DATO

XLTO

CLKO

SPOA

SPOB

XLON FO

K

VDD

VSS

MDP

PWMI

TEST

TES1

VPCOVCKI

V16MVCTL

PCO

FILO

FILI

AVSS

CLTV

AVDD

RF

BIAS

ASYI

ASYO

LRCK

LRCKI

PCM

D

PCM

DI

BCK

BCKI

VSS

VDD

XUGF

XPCK

GFS

C2PO

XTSL

C4M

DOUT

EMPH

ENPH

I

WFC

K

SCOR

SBSO

EXCK

VSS

VDDSYSM

AVSS

AVDD

AOUT1AIN1

LOUT1AVSSXVDDXTAI

XTAO

XVSS

AVSS

LOUT2AIN2

AOUT2

AVDD

AVSS

XRST

VDD

IC651 TA8409S

1 2 3 4 5 6 7 8 9

HEAT CUT OFF BLOCK

STANDBYBLOCK

VREFBLOCK

IN2 VCC OUT2 NC GND VS OUT1 VREF IN1

r IC Block Diagrams – WOOFER AMP SECTION –

IC601 TDA2052

3 4 5 6 721

OUT

VDD

MUT

E/ST

ANDB

Y

VEE

IN1+ IN–

IN2+

MUTE/ST-BY