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37GQ-20 (serv.man3). (including circuit diagram and parts listing) for the version 02 chassis - Sharp TV Service Manual (repair manual). Page 26

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26
37GQ-20H
NO SPECIFIC COLOUR
Is
some colour
produced in B/W Broadcast 
reception?
YES
NO
Check IC801, C812,
C813, R813, X801
Is 
the white 
balance properly 
adjusted?
YES
NO
Readjust The White 
Balance.
The Picture Colour is
Blue or Yellow.
The Picture Colour is
green or magenta.
The Picture Colour is
Red or cyan.
Check Q871, Q883 and 
their adjacent circuits.
Check Q870, Q885 and 
their adjacent circuits.
Check Q872, Q887 and 
their adjacent circuits.
UNLOCKED COLOUR
(NO COLOUR SYNCHRONIZATION)
Check setting of Colour 
Standard in Service 
Mode.
Normal
Check IC801, C812,
C813, R813, X801
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