Sharp XG-MB70X Serviceanleitung Seite 42

XG-MB70X
Checking of Sync signal
Are HV sync signals sent to
pins (1) and (6) of IC4010?
YES
Are HV sync signals sent to
pins (22) and (23) of IC3002?
YES
Are sync signals sent to pins
(28) and (29) of IC3002?
YES
Are sync signals sent to pins
(65) and (64) of IC3005?
YES
Is the timing of vertical and
horizontal sync signals
correct?
NO
Is the signal generator (input
source) correct?
NO
Set the signal source correctly.
NO
Check IC4008 and peripheral
circuits.
NO
IC4008 and IC4010 are
defective.
NO
Is a clock of 27MHz sent to pin
(42) of IC3002?
YES
Do signals of pins (21) and (22)
of IC3002 change?
YES
Check IC3002 and peripheral
circuits.
NO
IC3005 and peripheral circuits
are
defective.
YES
Sync signal is normal.
YES
IC2003 and peripheral circuits
are
defective.
42
NO
Check X3001 and
peripheral circuits.
NO
The I2C bus line does not
function normally.
Check IC2201, IC2003,
IC2005, IC2006, IC2007
and their peripheral
circuits.
Check if IC connected to
I2CBUS functions
normally.