Sharp 21N52-E1 - TROUBLESHOOTING: NO SPECIFIC COLOUR (SECAM); NO SPECIFIC COLOUR (SECAM) DIAGNOSIS

CIRCUITS TO BE CHECKED:
l IC801 and its adjacent
circuit.
l R.G.B. output circuit.
,
/
Is some colour produced
in B/W broadcast
Yes
I
When change channel does
colour appeared?
Colour appears but colour
shading.
/
Yes
No
Colour appears but
* abnormal colour.
Check pins (22), (23)
and (27) of K801 bias.
I I
I
Check pins (18), (20) and (21) of
IC802 bias.
I
1 Check IC801. I
Normal
Check Q853 and its
18