SANYO CE25DN4C
Service Manual

SERVICE CONTROL ADJUSTMENT
B1 POWER SUPPLY ADJUSTMENT 1. Set VR641 to be mechanical centre before pressing the main switch. 2. Tune the receiver to PAL circular pattern. 3. Set brightness and contrast controls to normal. 4. Connect digital V-meter to test point "TP-B". 5. By using VR641, adjust voltage to 150 ± 0.5 V.
V-Outout SW501 +8V TP-E o-coupler SW1901 SW1902 SW1903 SW1904 Prog.+ Prog.Vol.+ Vol.VR361 Q641 IC651

H-Output

VR641
Q681 T101 +B ADJ.

5. Set mode to one horizontal scanning line, how to set refer to "service mode" 6. Set screen VR for one colour to be just visible. [BIAS VR ADJUSTMENT] 7. By using VR601, VR611 or VR621, adjust line to be white. 8. Set screen mode OFF, how to set refer to "service mode" [DRIVE VR ADJUSTMENT] 9. By using VR602 and VR612, adjust white balance. HIGH VOLTAGE & WIDTH ADJUSTMENT [HIGH VOLTAGE ADJUSTMENT] 1. Tune the receiver to circular pattern. 2. Set brightness and contrast controls to maximum. 3. Connect digital V-meter to both terminals of R224, and high voltage meter to CRT anode. 4. Confirm high voltage to be 26.0 ± 1 KV at beam current 1.3, and less than 29.0 KV at 0 beam current. [H-WIDTH ADJUSTMENT] 5. Adjust VR462 to obtain proper VR642
T611 Converter Trans Transformer

SIF Board

IC801 CPU A101 Tuner

F601 SW601

AFT ADJUSTMENT 1. Tune the receiver to the clearest station. 2. By using T141, adjust AFT to obtain the best picture.

611 V-Centre

T481

Main switch Fuse

T141
TPRC Transformer

H- width. 6. Reconfirm high voltage. H-CENTRE ADJUSTMENT 1. Tune the receiver to circular pattern. 2. Adjust H-centre by using VR361.
VR501 SW501 1H Delay Q-SOUND Board

Q432

IC652

Q501

H-Centre

VR131

Q-SOUND Board

V-CENTRE ADJUSTMENT R224 1. Tune the receiver to circular pattern. 2. Adjust V-centre by using SW501.
AV2 SW.

IC501 +12V

VR501 V-Size

IC271 1H Delay

Q432

IC281

IC1201

H-Width

Scart 2

Scart 1

IC1202 T141 AGC Int./Ext. SW. VR641

V-SIZE ADJUSTMENT 1. Tune the receiver to circular pattern. 2. Adjust V-size by using VR501.

IC1202 Q461

SIF Board

VR131
AGC ADJUSTMENT NOTE: Do not attempt this adjustment with weak signal. 1. Tune the receiver to the clearest station. 2. Set AGC VR(VR131) in direction which causes snow noise to appear, then in the opposite direction until snow noise just disappears.

FOCUS ADJUSTMENT By using FOCUS VR, adjust focus control for good scanning lines.

IC201 IF/Video/Croma/Def. Q501 VR361 VR462 H-Centre

IC501 V-Outout

V-Size

IC271

H-Output

V-Centre

GREY SCALE ADJUSTMENT [SCREEN VR ADJUSTMENT] 1. Tune the receiver to the white pattern. 2. Set brightness and contrast controls to normal. 3. Set VR602and VR612 to be mechanical centre. 4. Turn VR601, VR611 and VR621 fully counterclockwise.

TP-E

IC281

VR131

Scart 2

Scart 1

SW501 -7-

VR501

AGC Int./Ext. SW.

IC1201 AV2 SW.

VR361

A101 Tuner Flyback TP-B

T451

F7VVV

J213

IC201 IF/Video/Croma/Def.

Q462 T101