Sharp XV-Z90E Service Manual page 28

XV-Z90E
XV-Z91E
Checking of Sync Signal
Is the horizontal synchronized
signal on IC5001 (6) pin?
Yes
Is the vertical synchronized signal
on IC5002 (6) pin?
Yes
Is the synchronized signal is
outputted from IC5009, IC5005,
IC5006, IC5007, IC5008?
Yes
Is the vertical synchronized signal
on IC6004 (31) pin?
Yes
Is the horizontal synchronized
signal on IC6004 (30) pin?
Yes
Is the vertical synchronized signal
on IC6004 (64) pin?
Yes
Is the horizontal synchronized
signal on IC6004 (66) pin?
Yes
Are the timing of both vertical and
horizontal synchronized signals
correct?
No
Is the signal generator (input
source) correct?
Yes
IC8001 and its periphery is
defective.
No
No
Check the PWB of the signal input
part.
No
Check each IC and the peripheral
circuit of IC.
No
No
Check IC6001, IC6002 and IC
peripheral circuits.
No
No
Failure of IC6004 and IC
peripheral circuit.
Yes
The sync signal is normal.
End of checking.
No
Set the signal source appropriately.
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