Service manual

ManualsBrandsSharp ManualsProjectorXG-XV1E

I

XG-XV1

E/A

TROUBLE SHOOTING TABLE

(Continued)

Checking the

XGA’s

Checking the VGA’s

green video circuit

green video circuit

and its peripheral

and its peripheral

circuits

circuits

No

Is there signal at pin (8) of

IC8004?

-

Is there signal at pin (8) of

IC8004?

LCP circuitry faulty.

Is there signal at pin (3) of

IC8007?

I

IC8004

or its peripheral circuit faulty.

f

Is there signal at pin (6) of

IC801

O?

-

Is there signal at pin (6) of

IC801

O?

I

IC8007

or its peripheral circuit faulty.

t

AretheresignalsatGllAOthru-7

No

---------‘-------

No

and

Gl

180

thru -7 of

lC8025?

I

IC8010

or its peripheral circuit faulty.

I

-------------w-m

Are there signals at Gl2AO thru -7

and

G12BO

thru -7 of lC8025?

_------_-__-----w

I

I

IC8020

or its peripheral circuit faulty.

I

Yes

I

-------e-----e--

l

41

Are there signals at Rl thru -10 and

No

Gl

thru -10 of

IC8031?

---__-------m--v-,

Yes

I

I

v

I

lC8025 or its peripheral circuit faulty.

,

I

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

I

Are there signals at the bases of

Ql9

No

and

Q21?

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

I

I

t

lC8031

or its peripheral circuit faulty. ,

I

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

I

Are there signals at pins (5) and (7) of No

TC2?

Check the video

-----m-_--_----D-

;

Q13,

Q18 thru

Q21

or their peripheral

, parts faulty.

I

system’s green

video circuit and its

I

TC2 connector or output

PWB

faulty.

__-----_--_---mm

I

,

peripheral circuits

I

------------__-_

I

Ad/

IC8020?

Are there signals at VBGO thru -7 of

__-----

-L-----e-,

I

I

i

R8277,

R8278 or LCP circuitry faulty. ,

Yes

33