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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 25

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25
37GQ-20H
NO VERTICAL SCAN
YES
NO
 Check  D709, D710, IC501
DEFECTIVE VERTICAL AMP.
AND VERTICAL LINEARITY
Readjust Vertical Size.
   
Check D505, D506
Check Q505, Q507, Q509
NEITHER VERTICAL NOR
HORIZONTAL SYNCHRONIZATION
Check IC801, C815, C816, R818
Vertical size is abnormal
Vertical linearity is abnormal
Is IC501
bias normal? 
Check R510, Q501,
Q502, Q503
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