Advertisement
Digital assy Trouble shooting
Check ICQ501.
no
Check Y,U,V signal
input of PQ101.
Yes
Check the circuit from PQ101
to CQ54,57
Replace an IC causing Power
drop.
Replace ICQ05
Replace ICQ04
Replace ICQ09
Replace ICQ08
Replace ICQ07
Replace ICQ02
Check with Color Bar signal input.
No Picture or
screen flows
no
Check Y,U,V
signals at CQ54(+),CQ57(+)
and CQ58(+).
no
Check the Vcc
of each IC.
no good
Check Pin 34~40 and
Pin 48~51 of ICQ05.
no good
Check Pin61~68 and
Pin2~5 of ICQ04
Pin13~16 no signal
Check Pin13~16, Pin18~21,
Pin22~25 of ICQ02.
Pin18~21
no signal
Pin22~25
no signal
Check the outputs
of Pin 2,4,5 of PQ102.
no signal
Check IC503
Screen flows
No Picture
Check Pin10 of ICQ06
Check Pin15 and
Yes
16 of ICQ06 for 27MHz and
13.5MHz waveform.
Check the Video
Yes
Sync at CQ54(+).
Check if Pin13 and 20
good
of ICQ01 have 32¥s?
Check Deflection Part
good
Yes
Yes
no good
Replace ICQ06
good
no good
good
no good
Replace IC501
good
no
Replace ICQ01
Yes
Advertisement
