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Feed the composite video signal to 
INPUT 4. Select INPUT 4 using the 
set's key or the remote controller.

Does the picture appear?

Is the picture disturbed?

End.

Is the picture signal inputted to the 
connector TC (9) pin?

Yes

Yes

No

No

Yes

Check the TERMINAL2 PWB.

No

Is the picture signal inputted to the 
(1) pin of IC3105?

Yes

Check the VIDEO-IN signal 
line ofIC3502 and IC3503.

No

Is input coming to IC3104 (1) (3) (5)?

Yes

Check IC3102 peripheral circuits.

No

Is output coming from IC3104 (16) (18) (20)?

Yes

Check IC3104 peripheral circuits.

No

Is the picture signal inputted to IC6004 (43) (48) (54) 
and the synchronized signal inputted to (30) (31)?

Yes

Check around IC3104, IC6001 and IC6002.

No

Is each digital output coming on IC6004 (64) (65) (66) (67)?

Yes

Check IC6004 peripheral circuits.

No

Is output coming from IC8001, DPORT?

Check the formatter PWB.

Yes

Check IC8001 peripheral circuits.

No

Is it N358 signal?

No

Check around IC3501, 3505.

Yes

Is it PAL?

No

Check around IC3504, 3506.

Yes

Is it SECAM?

Check the color system, around IC3105. Others.

No

Check around IC 3105. 
Malfunction of the color 
system is thinkable.

Yes

Checking of Video Input

Check IC3102 peripheral 
circuits.

1

3

No

Yes

Is synchronized signal 
coming to IC3102 (28) (29) 
pins?

2

Note
In case of N358, Y/C separates at IC3505 3 DY/C and inputted 
to IC3105 (5) (7) pins.
In case of PAL system, Y/C separates at IC3506 3 Line COM 
and inputted to (39) (41) of IC3105.
The video is outputted from (21) (22) (23) at color difference 
from IC3105.

Input the Component signal from INPUT 1.
Select INPUT 1 with the keys on the main body or the 
remote control.

Check IC3102 and around it.

Are IC3102 (76) (77) (78) 
outputting and the signals inputted 
to (73) (74) (75)?

Is the picture disturbed?

Is picture outputted?

Is the signal coming to the 
connector TD?

Yes

No

Check of the Terminal 2 PWB.

No

No

Yes

No

Yes

Is the picture signal coming to 
IC3102 (3) (4) (5)?

Check between the connector TD 
and IC3102.

No

Yes

Yes

Check of component 15 pin D-sub 
input

End.

1

4

Checking of Sync Signal

Is the horizontal synchronized 
signal on IC5001 (6) pin?

Is the vertical synchronized signal 
on IC5002 (6) pin?

Is the synchronized signal is 
outputted from IC5009, IC5005, 
IC5006, IC5007, IC5008?

Are the timing of both vertical and 
horizontal synchronized signals 
correct?

Is the horizontal synchronized 
signal on IC6004 (30) pin?

Is the vertical synchronized signal 
on IC6004 (31) pin?

The sync signal is normal. 
End of checking.

Yes

No

Check the PWB of the signal input 
part.

No

Yes

Yes

Yes

Yes

No

Yes

Check each IC and the peripheral 
circuit of IC.

No

Check IC6001, IC6002 and IC 
peripheral circuits.

No

Set the signal source appropriately.

No

2

Is the signal generator (input 
source) correct?

Yes

IC8001 and its periphery is 
defective.

No

Is the horizontal synchronized 
signal on IC6004 (66) pin?

Is the vertical synchronized signal 
on IC6004 (64) pin?

Yes

Yes

No

Failure of IC6004 and IC 
peripheral circuit.

No

» 

Formatter Unit Troubleshooting -1/2

Abnormal picture

No

Yes

Rainbow-like colors on-
screen.
No proper matching in 
red, green and blue.

Adjustments made on 
"PROCESS MENU"

→

"DLP"

→

"INDEX", but 

correction impossible.

Blackout

Are connections made 
properly with the 
SC9101 and SC9001 
sockets?

Is the color wheel 
running?

IC9101, IC9102 or their 
peripheral circuit, or 
color wheel defective.

Thick, white vertical 
stripes (flashing).

No

Others

IC9003, IC9004, IC9006 
or their peripheral circuit 
defective.

Is connection made 
properly with the 
SC9001 socket?

No

Is the voltage at pin (3) 
of IC9007 as specified 
(+2.5V)?

Yes

Yes

Are there 400-MHz 
sine-wave signals at 
pins (18) and (20) of 
IC9001?

Are there dust deposits on 
DMD, formatter board and 
cLGA contact terminal?

No

Refit the DMD, optical 
mechanism and formatter 
board PWB.

Yes

IC9001 or its peripheral 
circuit defective.

Yes

No

No

Is the specified voltage 
applied to the P9002 
connector?

Yes

IC9003 and/or IC9004 
defective.

Check the main PWB 
and power unit.

Yes

No

Is the voltage at the 
positive-polarity pin of 
C9308 as specified 
(+5V)?

Yes

IC9301 or its peripheral 
circuit defective.

No

Is there 150-Hz pulse 
signal at pin (2) of 
P9003 with no signal 
input?

Yes

Check the color wheel 
sensor PWB.

No

Is the voltage at pin (9) 
of IC9301 as specified 
(+23 to +26V)?

Yes

No

Is the voltage at pin (13) 
of IC9301 as specified 
(-26V)?

Yes

IC9301 or its peripheral 
circuit defective.

No

Is the voltage at pin (49) 
of IC9301 as specified 
(+7V)?

Yes

No

Is a lamp turned on?

Yes

5

6