Service manual

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XG-XVIEIA

1

TROUBLE SHOOTING TABLE

(Continued)

I

Checking the clock circuit and its peripheral

circuits

I

Is pin (3) of

IC8001

oscillating?

X8002 or its peripheral part faulty.

-__-----------__I

Does pin (63) of

IC8001

function?

, Check the sync signal circuit and its

t

I

peripheral circuits.

I

--,-------------I

----------------

Aretheresignalsatpins(141),(145),

No

(148) and (159) of

IC8020?

Yes

I

---------------m,

f

lC8025 or its peripheral circuit faulty.

I

t

-------,--------I

No

Is the input having a resolution below

XGA level or in the video mode?

Yes

Are there signals at pins (238) and

(239) of lC8025?

No

Yes

I

----------__-___

I

41

t

IC8020

or its peripheral circuit faulty. ,

I

---_------------I

v

Are there signals at pins

(13),

(14)

t

lC8025 or its peripheral circuit faulty.

t

--m----J-------,

----------------

I

I

CheckthePLLcircuitandits

f

I

peripheral circuits,

I

----------------I

30