Sharp XG-MB70X, Руководство по обслуживанию

Страница: 42 / 161

42
XG-MB70X
Checking of Sync signal
Are HV sync signals sent to
pins (1) and (6) of IC4010?
Check IC4008 and peripheral
circuits.
Are HV sync signals sent to
pins (22) and (23) of IC3002?
IC4008 and IC4010 are
defective.
Are sync signals sent to pins
(28) and (29) of IC3002?
Is a clock of 27MHz sent to pin
(42) of IC3002?
Check X3001 and
peripheral circuits.
Do signals of pins (21) and (22)
of IC3002 change?
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.
Check IC3002 and peripheral
circuits.
Are sync signals sent to pins
(65) and (64) of IC3005?
IC3005 and peripheral circuits
are
defective.
Is the timing of vertical and
horizontal sync signals
correct? Sync signal is normal.
Is the signal generator (input
source) correct?
IC2003 and peripheral circuits
are
defective.
Set the signal source correctly.
NO
YES
NO
YES
NO NO
YES
YES
NO
YES
NO
YES
YES
NO
YES
NO