NEC MultiSync LCD1550V - Checking the Resolution Change IC Movement

6-14
9. Checking the resolution change IC movement
NG
OK
NG
OK OK
Proceed section 11 "Checking the
operation of CPU"
Failure point
Y1 failure
Is there +3.3V supply on U3 pins 65, 76, 86, 121, 143, 157, 167, 198, 193, 183, 179, 175, 188.
Is there +2.5V supply on U3 pins 5, 7, 10, 11, 12, 15, 18, 21, 22, 25, 28, 31, 35, 36, 42, 63, 76,
88, 119, 141, 159, 162, 163, 166, 169, 170, 189, 190, 196.
Is 14.318MHz clock input to U3 pin 3, 4 at
TTL level.?
Is 14.318MHz clock output from Y1 at TTL
level.?
Proceed section 11 "Checking the
operation of CPU"
All manuals and user guides at all-guides.com