Pass Laboratories Aleph L, Service Manual

Page: 3 / 16

2.21K
R6
100
R112
TH1
THERMISTOR
1 1 5 A
0 A
1 1 5 B
0 B
A
B
C
D
D1-4
4 X 1N4004
- +
1000 UF
C2
R1
3.3 3W
C1
1000 UF
IRF9610
Q3
S D
G
6.8K 3W
R3
750
RV1
562
RV2
475
RV3
392 RV4
331 RV5
274
RV6
221
RV7
182
RV8
150 RV9
124
RV10
100
RV11
82.5
RV12
68.1
RV13
56.2
RV14
47.5
RV15
39.2
RV16
33.1
RV17
27.4
RV18
22.1
RV19
18.2
RV20
15
RV21
C 2 C 1
10
RV22
RELAY NC
L 2
L 1
SELECT
S1
S 1
C 3
C 2
C 4
C 1
10UF C102
R111
15
IRF9610
Q102
S D
G
R110
221
R109
221
MPSA92 Q103
R108
10K
C103
680 UF
R106
47.5K
C104
680 PF
IRF610
Q101
S D
G
R105
221
C101 10UF
R107
6.81K
S2
0 DB
C 2 C 1
+6 DB
C 2 C 1
+12 DB
C 2 C 1
R104
221K 10K
R101
22.1K
R102
47.5K
R103
9.1V
Z101
9.1V
Z102
OUTPUT 2
INPUT 1 INPUT 2 INPUT 3 INPUT 4
9.1V
Z7
9.1V
Z6
9.1V
Z5
9.1V
Z4
9.1V
Z3
OUTPUT 1
R2
4.7K 3W
F1
.25A SLO
221K
R8
2.21K
R7
Z1
9.1V
Z2
9.1V
D5
1N4004
1000 UF
C4
1000 UF
C3
9.1V
Z8
IRF610 Q1
S D
G
221
R4
4.75K
R5
C5
220UF
R9
221
Q2
IRF610
G
D S
D6
1N4004
R10
4.75K
R11
4.75K
LED1
D7
1N4004
4V
.7V
+25V
+4V
+30V
V+UNREG
OUTPUT
INPUT GAIN
CURRENT SOURCE
POSITIVE RELAY
GAIN TRANSISTOR
LEVEL CONTROL
AVEL 4007
2/1/96
PASS
PL20.S01
ALEPH L PREAMP
PL20
100-120V
200-240V
V+ REG
+60V
V+ DEC
+65V
+85V
REGULATOR
NEGATIVE RELAY
+4V
A
B
C
D
4 3 2 1
D
C
B
A
1
2
3
4
B
Rev
Number
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