Read Sharp XG-NV6XE (serv.man4) Service Manual online
42
XG-NV6XE
Checking the clock circuit and its peripheral circuits
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
Is X8001 (6MHz) oscillating?
X8001 or its peripheral part faulty.
No
No
Is X8002 (32.768kHz) oscillating?
X8002 or its peripheral part faulty.
No
Is X8004 (22.165MHz) oscillating?
X8004 or its peripheral part faulty.
No
Is X8005 (16.25MHz) oscillating?
X8005 or its peripheral part faulty.
Is X8003 (1.84MHz) oscillating?
No
Does pin (162) of IC8001 function?
X8003 or its peripheral part faulty.
IC8001 or its peripheral circuit faulty.
Check the sync signal circuit and its
peripheral circuits.
peripheral circuits.
Yes
No
Are there signals at pins (46), (49)
and (50) of P8404 (or TP5 and TP4)?
and (50) of P8404 (or TP5 and TP4)?
LCP circuitry faulty.
No
Is the signal a sync on green signal?
No
No
No
Are there signals at pin (7) of IC8036?
IC8023, IC8034, IC8036 or its
peripheral circuit faulty.
peripheral circuit faulty.
No
Are there signals at pins (149) and
(150) of IC8020 (TL34, 35)?
(150) of IC8020 (TL34, 35)?
IC8025 or its peripheral circuit faulty.
Is the input having a resolution below
XGA level or in the video mode?
XGA level or in the video mode?
Yes
No
Are there signals at pins (14), (16) and
(18) of P8405 connector?
(18) of P8405 connector?
IC8029 or its peripheral circuit faulty.
IC8025 or its peripheral circuit faulty.
IC8029 or its peripheral circuit faulty.
No
No
No
Are there signals at pins (26), (28) and
(29) of IC8020 (TL43,TL41,TL42)?
(29) of IC8020 (TL43,TL41,TL42)?
IC8020 or its peripheral circuit faulty.
Are there signals at TL22, TL25,
TL27?
TL27?
Are there signals at TP6 and TP7?
Go to "Checking the PLL circuit and
its peripheral circuits".
its peripheral circuits".
Is the sync signal of H/V separate
type?
type?
TROUBLE SHOOTING TABLE FOR PC I/F UNIT-1
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