Receiver - JBL JSR-400 Service Manual

Dolby Pro-Logic A/V Receiver
Ò
Main PCB - IC1 (LC7821)
FUNCTION SELECTOR
L1
1
L2 2
L3
3
L4
4
LCOM1
5
L5
6
L6 7
LCOM2
8
L7
9
L8
10
LCOM3
11
LVDD 19
LEVEL SHIFT
VSS 16
VEE 12
RES
18
SHIFT RESISTOR
S
17
Power Supply PCB
IC5 (7806) TO220i +6V
IC6 (7815) TO220i +15V
1A REGULATORS
1. INPUT
2. GROUND
3. OUTPUT
1 2
INTEGRATED CIRCUIT DIAGRAMS 5
30
29
28
27
26
25
24
23
22
21
20
14
LUCH
15
13
Power Supply PCB
IC7 (7915) TO220i -15V
1A REGULATOR
1. GROUND
2. INPUT
3. OUTPUT
3
Tuner PCB IC4 - (LA3410) FM IPX
16
R1
OSC
R2
R3
R4
RCOM1
FF
R5
R6
RCOM2
R7
R8
LCOM3
VOLT REG
1
DI
CL
CE
A OUTPUT
1 2 3
15 14 13 12 11 10
PHASE
COMPARATOR
VCO STOP
FF
DECODER
A2
A3
A4
A5
A1
2 3 4 5
Main PCB IC4, 13
Tone PCB IC8
Video PCB IC1, 2
(NJM4558) OP AMP
1
2
A -INPUT
A
-
+
3
A +INPUT
+
4
-Vcc
JSR-400
9
LAMP
DRIVER
LAMP
TRIGGER
STEREO
SWITCH
A6
6 7 8
8
+Vcc
7
B OUTPUT
6
B -INPUT
B
-
5
B +INPUT
4 0