Sharp 37GQ-20S Service Manual page 27

NO
Check IC801, C812,
C813, R813, X801
The Picture Colour is
Red or cyan.
Check Q871, Q883 and
their adjacent circuits.
NO SPECIFIC COLOUR
Is
some colour
produced in B/W Broadcast
reception?
YES
The Picture Colour is
green or magenta.
Check Q870, Q885 and
their adjacent circuits.
UNLOCKED COLOUR
(NO COLOUR SYNCHRONIZATION)
Check setting of Colour
Standard in Service
Mode.
Normal
Check IC801, C812,
C813, R813, X801
27
YES
Is
the white
balance properly
adjusted?
The Picture Colour is
Blue or Yellow.
Check Q872, Q887 and
their adjacent circuits.
37GQ-20S
37GQ-21S
NO
Readjust The White
Balance.