DYNACO PAS-4 - Circuit Schematics

12
C7
C6
C5
C4
C2
R13
R10
R6
R8
R7
R5
R4
R3
FB1
22pF
6.49K
220pF
-3.3V
499K
3.3uF
2M
165K
1500pF
440pF
12AX7
1.37K
8
7
6
3
2
1
47K
249K
287K
V1
400V
C1
10pF
V2B
R12
R11
V2A
R9
6DJ8
6DJ8
1
2
3
6
7
8
301
9
301
C9
24.9K
V3B
R24
R26 R25
400V
.1uF
C8
R23
V3A
R22
R21
R20R19
AUX
VIDEO
TUNER
CD
3.3uF
400V
6DJ8
OUTPUTS
221
2M
6DJ8
15K
1
2
3
221
6
7
8
301
9
301
301K
50K
50K
VOLUME
BALANCE
3W
PHONO
LEFT INPUTS
TAPE 2
TAPE 1
OUT
TAPE 1
IN
OUT
TAPE 2
IN
EQ OUT
EQ IN
SW1A
TAPE DUBBING
SW2A
TAPE MONITOR
SW3A
SW4A
ACTIVE INACTIVE
INPUT SELECTOR
MONOSTEREO
SW5
5.6K 5.6K
1W
249
P1A
P2A
R1 2K
R2 2K
R118
1 2
C107
C106
C105
C104
C102
R113
R110
R107
R108
R106
R105
R104
R103
FB2
22pF
6.49K
220pF
499K
3.3uF
2M
165K
1500pF
440pF
1.37K
8
7
6
3
2
1
47K
249K
287K
400V
C101
10pF
V5B
R112
R111
V5A
R109
6DJ8
6DJ8
1
2
3
6
7
8
301
9
301
C109
24.9K
V6B
R124
R126 R125
400V
.1uF
C108
R123
V6A
R122
R121
R120R119
3.3uF
400V
6DJ8
OUTPUTS
221
2M
6DJ8
15K
1
2
3
221
6
7
8
301
9
301
301K
50K
50K
VOLUME
BALANCE
3W
RIGHT INPUTS
1W
249
P1B
P2B
1 2
RIGHT
LEFT
00501B 1 2
PAS-4 PREAMPLIFIER
19 JULY 94 OFREV PAGE DWG#
C3
.1uF
400V
-3.3V
C103
400V
.1uF
12AX7
V4
499K
R27
499K R127
13
2
3
4
5
13
1
2
3
R28
140 140
R128
N.C.
N.O.
N.C.
N.O.
K1-B K1-A
AUX
VIDEO
TUNER
CD
PHONO
TAPE 2
TAPE 1
OUT
TAPE 1
IN
OUT
TAPE 2
IN
EQ OUT
EQ IN
SW1B
TAPE DUBBING
SW2B
TAPE MONITOR
SW3B
SW4B
ACTIVE INACTIVE
INPUT SELECTOR
R101
2K
R102
2K
19
10
11
19
7
8
9
22
10
11
12
7
8
9
EQUALIZER
EQUALIZER
6 4 7 8
12 10
13
1
2
3
16
4
5
6
19
1
7
8
9
R18
3W RESISTORS ARE 5%, METAL OXIDE
1/2W AND 1W RESISTORS ARE 1%, METAL FILM
+300V
A
+300V
B
+300V
C
+300V
F
+300V
E
+300V
D