SANYO CE21BN4
Manual de Servicio

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 130 ± 0.5 V.
V-Outout +8V SW1901 SW1902 SW1903 SW1904 Prog.+ Prog.Vol.+ Vol.Q641 VR361 VR131 T141 T481 TP-E o-coupler

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 25.0 ± 1 KV at beam current 1.1mA, and less than 28.0 KV at 0 beam current. [H-WIDTH ADJUSTMENT] 5. If H-width is too wide or narrow, connect or disconnect a lead wire J213. 6. Reconfirm high voltage.
Q432

VR641
Q681 +B ADJ.

SIF Board

SW601 F601

IC801 CPU A101 Tuner

RC Transformer TP-

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

Fuse Main switch

T101

J213
Q461 T611

T141

IC651

IC652

IC1202

IC501 +12V

VR501 V-Size

IC271 1H Delay

Q432 H-Output

IC281

H-Centre

Q-SOUND Board

V-CENTRE ADJUSTMENT 1. Tune the receiver to circular pattern. 2. Adjust V-centre by using SW501.
AGC Int./Ext. SW. VR641 IC1201 AV2 SW.

SW501 V-Centre 611

VR361

VR131 IC1202

1. Tune the receiver to circular pattern. 2. Adjust V-size by using VR501. AGC ADJUSTMENT VR131 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. 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. 5. Set mode to one horizontal scanning line, how to set refer to "service mode"

T451

Scart 2

Scart 1

V-SIZE ADJUSTMENT

T101

Flyback TP-B

Q501

TP-E

A101 Tuner Transformer

FOCUS ADJUSTMENT By using FOCUS VR, adjust focus control for good scanning lines.
IC201 IF/Video/Croma/Def. Q501 H-Centre SIF Board

IC501

VR501 V-Size

IC271

H-Output

IC281

V-Centre

Q-SOUND Board

SW501

VR501

AV2 SW.

Scart 2

Scart 1

AGC Q4 Int./Ext. SW.

IC1201

VR361

-7F7JGV

Converter T

J213

IC201 IF/Video/Croma/Def.

H-CENTRE ADJUSTMENT 1. Tune the receiver to circular pattern. 2. Adjust H-centre by using VR361.
1H Delay

V-Outout

SW501