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Service manual
Pathos Acoustics, info@pathosacoustics.com, tel: +39 0444 264 732 fax: +39 0444 Pathos Acoustics, info@pathosacoustics.com, tel: +39 0444 264 732 fax: +39 0444 381 275 381 275
In Power
{Doc}
InPower Vacuum Preamp. Stage
A4
1 3Saturday, December 26, 1992
Title
Size Document Number Rev
Date: Sheet of
275 v
270 V
+12.6 V
PATHOS ACOUSTICS
R1
100!
1 2
C1
0.1/400V
1
2
Q1
MPSA 42
C2
100/350V
1
2
V1
ECC83
2
3 4 5
1 6
7
4 5 8
R4
82 K
1
2
R3
82 K
1
2
V2
ECC82
2
3 4 5
1 6
7
4 5 8
C4
0.1/400
1
2
C3
100/350
1
2
C5
6.8/100
1 2
R5
470K
1
2
C8
6.8/100
1 2 R10
27K
1
2
R9
27K
1
2
R12
2K5
1
2
R8
2K2
12
D1
1N4007
1
2
R13
3K65
1
2
C11
1000/25
1
2
R2
2K2
1 3
2
R62K2
13
2
R7
470K
1
2
R11
270K
1 2
C12
330!f/63 V
1
2
D2
30 V
C6
0.1/250
1 2
C7
1/250
1 2
C9
0.1/250
1 2
C10
1/250
1 2
in +
in -
out +
out -
{Doc}
InPower Power Mos-Fet Stage
A4
2 3Saturday, December 26, 1992
Title
Size Document Number Rev
Date: Sheet of
Vcc 35 VVcc 35 V
PATHOS ACOUSTICS
INDUCTOR
Adjust current on the fuse
F1 to 4A with POT R16
Adjust current on the fuse
F2 to 4A with POT R17
C13
220/25
1
2
D3
24 V
R18
330 K
1
2
R14R
12
D5
15 V
D7
15 V
R20
10 K
1
2
1
SPEAKER
12
Q6
IRF P 240
2
1
3
R21
10 K
1
2
Q7
IRF P 240
2
1
3
Q8
IRF P 240
2
1
3
R22
10 K
1
2
R28
220 K
1
2
D8
15 V
D6
15 VR27
10 K
1
2Q5
IRF P 240
2
1
3
Q4
IRF P 240
2
1
3
R26
10 K
1
2
R25
10 K
1
2Q3
IRF P 240
2
1
3
R29
220 K
1
2
R19
330 K
1
2
R17
100k
1
3
2
R16
POT
1
3
2
R15
2k7
12
R24
10 K
1
2Q2
IRF P 240
2
1
3
Q9
IRF P 240
2
1
3
R23
10 K
1
2
C14
220/25
1
2
D4
24 V
F1
FUSE
12
F2
FUSE
12
in + in -
{Doc}
InPower Power Supply
A3
3 3Saturday, December 26, 1992
Title
Size Document Number Rev
Date: Sheet of
AC IN
VCC_CIRCLE
+12.6 V
270 V
35 V
PATHOS ACOUSTICS
Vacuum Tube Power supply
Vacuum Tube Heater
F3 FUSE
1 2 C17
0.1/400
1
2 C15
220/400
1
2
R32
470K
1
2
Q11
MPSA92
R30
1K8
1
2
R31
2K7
1 2
Q10
BUT 12
C20
22/350
1
2
D9
9.1 V
D10
4x 1N4007
- +
1
2
3
4
D13
4A 200V
- +
1
2
3
4
D11
270 V
R36
220K
12
R34
220K
12
C21
1/50
12
U2
LM555
-1
-
2
-
3
-4
-5
-
6
-
7
-8
C220.01
12
D14
1N4148
1
2
R33
100K
12
D12
1N4007
12
K1
12V 1S
43
12
T1
MAIN POWER TRANSFORMER
1 5
4 8
TF1
Transformer
S1
SW SPST
D16
LED
1
2
C23
0.1
1
2
C24
4700/25
1
2
C25
0.1
1
2
C26
4700/25
1
2
U1
LM7812
IN1
C
2
OUT3
D15
1N4007
1
2
R35
1K
1
2
L1
INDUCTOR IRON
12D17
25A 200V
- +
1
2
3
4
C29
22000/50
1
2
C30
22000/50
1
2
F4 FUSE
1 2
C190.1/250 V
1
2
C280.1/250 V
1
2
C27
220/25
1
2
C18
0.1/400
1
2 C16
220/400
1
2
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