Sylvania SC313C Service Manual page 45

Main CBA Top View
CAUTION !
Fixed voltage power supply circuit is used in this unit.
If Main Fuse (F601) is blown, check to see that all components in the power supply
circuit are not defective before you connect the AC plug to the AC power supply.
Otherwise it may cause some components in the power supply circuit to fail.
CAUTION
FOR CONTINUED PROTECTION AGAINST FIRE HAZARD,
REPLACE ONLY WITH THE SAME TYPE FUSE.
ATTENTION : POUR UNE PROTECTION CONTINUE LES RISQES
4A/125V D'INCELE N'UTILISER QUE DES FUSIBLE DE MEMO TYPE.
RISK OF FIRE-REPLACE FUSE AS MARKED.
"This symbol means fast operating fuse."
"Ce symbole reprèsente un fusible à fusion rapide."
Sensor CBA
Top View
(START-SENSOR)
BHB300F01011-B
BHB300F01011-A
1-9-15
Sensor CBA Top View (END-SENSOR)
WF8 WF5
BHB300F01011-A
J187 J188
A-OUT V-OUT
BHB300F01011-B
WF3
J116
CTL
1-9-16
BECAUSE A HOT CHASSIS GROUND IS PRESENT IN THE POWER
SUPPLY CIRCUIT, AN ISOLATION TRANSFORMER MUST BE USED.
WF6 WF1
ALSO, IN ORDER TO HAVE THE ABILITY TO INCREASE THE INPUT
J189 J190 J191
SLOWLY, WHEN TROUBLESHOOTING THIS TYPE POWER SUPPLY
PB-C- RF-SW RF AGC-
CIRCUIT, A VARIABLE ISOLATION TRANSFORMER IS REQUIRED.
MONI OUT
R583 J192
(H Adjustment) +B
MAIN CBA
Ref No. Position
ICS
IC201 A-3
IC202 A-2
IC301 D-3
IC401 C-3
IC551 D-1
IC601 E-3
IC602 D-2
IC801 A-1
TRANSISTORS
Q205 A-4
Q206 B-3
Q301 D-4
Q302 D-4
Q401 B-3
Q402 B-3
Q491 B-3
Q571 D-1
J233
Q572 D-1
B-OUT Q591 C-1
Q601 E-3
Q602 E-3
Q604 E-2
Q605 E-2
Q606 E-2
Q607 D-2
Q608 D-2
Q609 D-2
Q610 D-3
Q611 D-3
Q612 C-1
Q871 C-3
Q872 C-2
Q873 C-3
Q874 C-3
Q875 C-3
TEST POINTS
J116 C-1
VR601
J187 D-4
+B ADJ
J188 D-4
J189 D-4
J190 D-4
J191 D-4
J233 D-3
J234 D-3
J239 D-3
J262 D-3
J264 D-3
J551 D-1
J552 D-1
CONNECTORS
CL201 B-1
J213
CL401 C-3
GND
CL402 C-2
CL501 D-2
CL504 D-3
CN303 C-4
CN571 D-1
CN601 E-4
CN802 B-4
ADJUSTMENT
VR601 E-2
1-9-17 BT5300F01012