Philips 202P4 - Page 92

C. Horizontal deflection
output repair flow :
1. Sympton :
without
H-deflection.
2. Sympton :
East /West
corr.
7421 pin6
check
230V
check Hsync
7541 drain
refer 7421 check list
or replace 7421
No
Ok
check
5542,3546
Ok
No
replace 5543
4. Sympton :
rotation
check 7505
pin 2,3,8
enter factory mode
check linearity data
in eeprom
check 7586
pin 1,4,8
check
3528/7503
7504 emitter
check 7421
pin11
parabola exist
check 2443
parabola
exist
3. Sympton :
H-linearity /H-DC
(full freq. range)
replace 3523
check
7502
refer 7421
check list
5. Sympton :
H_dc shift
check
7542,7543
check
7421 pin 32
enter OSD
function
disable morier
check
7601collector
check
7545 collector
7544 emitter
6. Sympton :
Focus
check B+ Control
7422,7423 base
check B+ Control
7541 base
check B+ Control
refer cpu
chece list
check cpu
pin 2,4
check cpu
7301 pin38
control range
check
3590/7587
/7588
check cpu
7301 pin2
control range
check
3617/5672/5601
84
202P4 M25P
Repair Flow Chart
Go to cover page