Service manual

ManualsBrandsSharp ManualsProjectorXG-XV1E

XG-XV1

E/A

I

TROUBLE SHOOTING TABLE

(Continued)

Checking the

XGA’s

blue video circuit

and its peripheral

circuits

Checking the VGA’s

blue video circuit

and its peripheral

circuits

I

No

Is there signal at pin (3) of

IC8004?

Is there signal at pin (3) of

IC8004?

No

Is there signal at pin (3) of

IC8006?

Is there signal at pin (3) of

IC8006?

I

I

IC8004

or its peripheral circuit faulty.

1

No I_----_-- -------- I No

Is there signal at pin (6) of

IC8009?

Is there signal at pin (6) of

IC8009?

I

I

IC8006

or its peripheral circuit faulty.

I

Are there signals at

Bl

1AO

thru -7

and

Bl

1

BO thru -7 of

lC802.5?

Yes

I

I

IC8009

or its peripheral circuit faulty.

I

I

_--_-----s-e----

I

I

I

IC8020

or its peripheral circuit faulty.

1

I

_----m------v---

l

Yes

,

v

Are there signals at Rl thru -10 and

No

Gl

thru -10 of lC8032?

_---_---e-------Y

1

Yes

I

I

1

lC8025

or its peripheral circuit faulty.

I

.

I

-

-

-

-

-

-

-

-

-

-

-

-

-

-

--

I

Are there signals at the bases of

Q23

No

and Q25?

_---_------------,

I

I

lC8032

or its peripheral circuit faulty.

I

I

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

I

Are there signals at pins (1) and (3) of

No

TC2?

Check the video

_____-----------q

Yes

y

i

Q13,

Q22 thru

Q25

or their peripheral

I

system’s blue video

, parts faulty.

I

---m---m

---_____

circuit and its

I

TC2 connector or output PWB faulty.

______----------

I

I

peripheral circuits.

I

--0s----_--_____

I

No

Are there signals at VBBO

thru

-7 of

IC8020?

----_------------,

I

I

1

R8279,

R8280

or LCP circuitry faulty.

I

I

_--__--_---M---e

Yes

0

D

34