Sylvania SSD800 Service Manual page 59

Main CBA Bottom View
CAUTION !
Fixed voltage power supply circuit is used in this unit.
If Main Fuse (F001) 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.
Note:
The Tuner Unit ( TU701 ) is either type A or type B.
Main CBA
Wave Form will be different. It depends on the type of
Ref.No Position
tuner used on the unit you are servicing.
ICS
IC301 D-3
TYPEA TYPEB
IC451 C-3
IC501 D-1
IC751 A-3
IC1001 E-4 WF8 WF8 WF8 WF8
IC1002 A-4
IC1003 B-5
IC1004 B-5 WF9 WF8 WF8 WF9
IC1006 F-4
IC1201 A-4
IC1402 A-5
TRANSISTORS WF8 WF10 WF10 WF8
Q052 C-4
WF11 WF8 WF11 WF8
Q055 C-4
Q056 C-4
Q060 E-4
Q301 D-2
Q302 C-2
WF14 WF8
Q303 C-2
Q391 B-5
Q421 C-3
Q422 B-3
Q423 E-3
Q424 D-3
WF14 WF8
Q425 D-3
Q501 C-1
Q503 B-3
Q504 F-3
Q506 D-2
Q760 A-2
Q762 C-4
Q763 C-4
Q1001 E-5
Q1002 C-4
Q1003 E-5
Q1004 B-4
Q1005 B-4
Q1006 C-4
Q1007 B-4
Q1008 E-5
Q1011 B-4
Q1015 A-4
Q1201 A-3
Q1202 A-4
Q1203 A-3
Q1204 A-3
Q1351 A-5
CONNECTORS
CN251 C-3
CN501 B-3
CN502 F-2
CN504 E-3
CN505 F-3
CN651 F-2
CN1001 A-2
CN1601 A-3
CN2002 A-3
CN2003 A-1
VARIABLE RESISTORS
VR501 F-2
TEST POINTS
TP301 B-2
TP302 B-2
TP303 F-3
TP502 B-2
TP505 F-3
TP506 F-2
TP507 B-3
TP751 C-5
1-11-26
CAUTION
FOR CONTINUED PROTECTION AGAINST FIRE HAZARD,
F REPLACE ONLY WITH THE SAME TYPE FUSE.
ATTENTION : POUR UNE PROTECTION CONTINUE LES RISQES
D'INCELE N'UTILISER QUE DES FUSIBLE DE MEMO TYPE.
A V
RISK OF FIRE-REPLACE FUSE AS MARKED.
"This symbol means fast operating fuse."
"Ce symbole reprèsente un fusible à fusion rapide."
1-11-27
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.
NOTE :
The voltage for parts in hot circuit is measured using
hot GND as a common terminal.
BH9200F01012-A
1-11-28