Receiver - JBL JSR-400 Service Manual

POWER RELAY
GROUND CPU 5V
IC VCC
TO CONTROL
I J
C5
VR1D 4.7/50
+
50KA C15
4.7/50
+
R7
47K
R11
8.2K R16
C9
47K
R13
100P
1K
L
VIDEO
2
R
4
JA1
VIDEO
6
CN11
CN5
+24V
1
1
2
2
3
G
3
4 TO WA10
G
5
6
G
7
+ 15V
8
HEADPHONE PART
- 15V
9
CAUTION TO THE SERVICE TECHNICIANS
BEFORE RETURNING THE RECEIVER TO THE CUSTOMER
LEAKAGE CURRENT OR RESISTANCE MEASUREMENTS
SHOULD BE PERFORMED TO DETERMINE THAT EXPOSED PARTS
ARE PROPERLY INSULATED FROM THE SUPPLY CIRCUIT.
1.25A/250V 1.25A/250V
*NOTE
1. ALL RESISTANCE VALUES ARE IN .
K -1000W. M W W -1000K . W
2. THE WATTAGE OF RESISTORS IS 1/4W, 1/8W UNLESS OTHERWISE NOTED.
3. ALL CAPACITANCES VALUES ARE IN uF UNLESS OTHERWISE NOTED. P=uuF
CAUTION THE PARTS IDENTIFIED WITH THE IEC SYMBOL
MARKS ARE CRITICAL FOR SAFETY. REPLACE ONLY WITH
TYPE IDENTICAL TO THOSE IN THE ORIGINAL CIRCUIT OR SPECIFIED
IN THE "PARTLIST" DO NOT DEGRADE THE SAFETY OF THE APPLIANCE
THROUGH IMPROPER SERVICING.
JSR-400 POWER BOARD SCHEMATIC DIAGRAM
K L
R55
47
R18
470
-15V
CN10
R83 C82
330 100P
VIDEO L
1
1
GND SIG.
2
VIDEO R
3
VIDEO GND
4
3
VIDEO SIG.
C83
R84
5
100P
330
C80
33/16
TO MAIN
+
5
R82
75
R53
680(1W)
L
G
R52 JACK 3
R
680
1W
TO WA2
W
M N
BALANCE
BASS
TREBLE
R63
22K
C61 C49
R73
332M 100*2
2.2K
68P
C52
VR2A
1
1
153M
VR3A
100K*2 C54
2
2
C64
C48 22/16
3
183M 3
823M
R65
R66
R79
100K 3.9K
820
R72
15V
1K
TONE PART
C62
4.7/50
+
C55
C58
R75
R60
332M 68P
100K
22K
R70
C47
2.2K
4
153M
4
100K*2
100K*2 5
VR2B
5
VR3B
C63
6
6
183M C53
823M
R77
820
R61
100K
R68
C50
3.9K
100P
C51
C57
4.7/50
22/16
O P
R OUT
R74 6
1K
R71
100K
R67
C59
100K
4.7/50
7
C60
100P
IC8
JRC4558DD
C56
4.7/50
8
9
R62
100K
10
L INPUT
11
12
13
JSR-400 PAGE 44 - 4 of 4
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