Service manual

- 26 -
4. TROUBLE IN DPM
TROUBLE IN DPM
TROUBLE IN PC
CHECK PC
PC IS NOT GOING
INTO DPM OFF MODE
NO
TROUBLE IN
X501
NO
TROUBLE IN
SIGNAL CABLE
NO
YES
YES
YES
CHECK
U501 PIN 6
WAVEFORM
(24MHz) ?
CHECK
R233, R234?
CHECK
U501 PIN 11
(0V) ?