Sony SDM-HS74P - Digital Power Management (DPM) Trouble

- 16 -
4. TROUBLE IN DPM
TROUBLE IN DPM
TROUBLE IN PC
CHECK PC
PC IS NOT GOING
INTO DPM OFF MODE
NO
TROUBLE IN
SIGNAL CABLE
NO
YES
YES
CHECK
R734, R741
(INPUT-1)SYNC.
R732, R755
(INPUT-2)SYNC.
CHECK
U501 PIN 24
(0V) ?