SYLVANIA DWT2704
Instrukcja Serwisowa

Main CBA Bottom View
CAUTION ! Fixed voltage ( or Auto voltage selectable ) 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. 4A/125V
CAUTION: FOR CONTINUED PROTECTION AGAINST RISK OF FIRE, REPLACE ONLY WITH SAME TYPE 4A, 125V FUSE. ATTENTION: UTILISER UN FUSIBLE DE RECHANGE DE M�ME TYPE DE 4A, 125V.

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.

WF6 PIN 3 OF IC801 WF8 Q571 Base WF10 PIN 3 OF WH501A

WF9 PIN 1 OF CN571 WF12 PIN 4 OF CN571 WF7 Q572 Collector WF11 PIN 7 OF IC551 WF1 PIN 26 OF IC111 WF16 PIN 8 OF TU11 WF2 PIN 14 OF IC111

7-13

7-14

BL2700F01011-1