Sylvania SRT2232S Service Manual page 33

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.
FOCUS-VR
(UPPER SIDE)
SCREEN-VR
(LOWER SIDE)
TP300
GND
TP302
15KHz
VR661
+B
ADJ
VR562
PCC
VR561
WIDTH
TP301
AGC
TP303
AFT
L33
VCO
7-15
4A/125V
TP601
+B
CAUTION
FOR CONTINUED PROTECTION AGAINST FIRE HAZARD,
REPLACE ONLY WITH THE SAME TYPE FUSE.
ATTENTION : POUR UNE PROTECTION CONTINUE LES RISQES
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."
7-16
BECAUSE A HOT CHASSIS GROUND IS PRESENT IN THE POWER
SUPPLY CIRCUIT, AN ISOLATION TRANSFORMER MUST BE USED.
ALSO, IN ORDER TO HAVE THE ABILITY TO INCREASE THE INPUT
SLOWLY, WHEN TROUBLESHOOTING THIS TYPE POWER SUPPLY
CIRCUIT, A VARIABLE ISOLATION TRANSFORMER IS REQUIRED.
7-17
MAIN CBA
Ref No. Position
ICS
A-1
IC31
F-5
IC151
IC333 E-5
IC431 C-2
IC551 C-2
D-4
IC601
F-2
IC771
IC781 C-1
IC801 F-2
D-1
IC901
B-1
IC941
TRANSISTORS
Q31 B-1
Q49 E-3
Q141 F-4
Q151 F-3
Q152 F-3
Q301 F-4
B-2
Q551
B-2
Q552
Q561 B-2
Q571 B-3
C-2
Q572
B-5
Q601
Q602 B-4
Q652 D-4
Q672 F-3
F-3
Q673
Q674 D-3
Q681 E-4
Q682 D-4
D-4
Q683
D-4
Q696
Q701 A-2
Q702 B-1
F-2
Q721
E-2
Q751
Q761 E-2
Q788 C-1
Q791 D-2
E-2
Q792
D-2
Q793
Q794 E-2
Q851 F-3
C-1
Q901
Q931 D-1
Q936 C-1
Q944 B-1
B-1
Q951
B-1
Q956
Q961 D-2
Q971 D-1
CONNECTORS
A-1
CN151
CN571 B-3
CN691 D-5
CN801 E-2
E-5
CN802
WH301A E-3
WH501A A-4
TEST POINTS
TP300 A-4
A-2
TP301
A-4
TP302
TP303 A-1
TP421 E-2
E-2
TP422
A-3
TP591
TP592 A-3
TP601 A-5
VARIABLE RESISTORS
B-2
VR561
VR562 B-2
VR661 B-2
BL6250F01011-1