Sharp XG-C40XE (serv.man15) Service Manual ▷ View online
31
XG-C40XU/XE
ADJUSTING THE PC BOARD (CPCi-0047CE15/16. PC I/F Unit)
1. RGB level adjustment
1) Connect a signal generator to the projector that is equipped with the 0047 PWB. Set the signal generator
output to the XGA mode (VESA1024x768, 60Hz, 32-tone waveform). Adjust the output amplitude to 700
mVp-p at the P8404 connector.
mVp-p at the P8404 connector.
2) Set the projector input to the RGB1 mode.
3) Using a pushbutton on the projector, call the process mode.
4) On the main menu screen, select the group “A/D”.
5) Select the subject “R-BRIGHT” in the group “A/D” and adjust the “R-BRIGHT” setting so that there should be
3) Using a pushbutton on the projector, call the process mode.
4) On the main menu screen, select the group “A/D”.
5) Select the subject “R-BRIGHT” in the group “A/D” and adjust the “R-BRIGHT” setting so that there should be
no bits around the screen.
6) Do the same with the “G-BRIGHT” and “B-BRIGHT” settings.
7) Next select the group “R-D” and the settings of the above subjects so that there should be no bits around the
7) Next select the group “R-D” and the settings of the above subjects so that there should be no bits around the
screen.
8) Then select the groups “G-D” and “B-D” and make the same adjustments.
Now let’s go to the DTV level adjustment.
2. DTV level adjustment
1) Set the signal generator output to the green-only mode.
2) On the main menu screen of the process mode, select the group “DTV”.
3) Select the subject “G-BRIGHT” in the group “DTV” and adjust the “G-BRIGHT” setting so that there should be
2) On the main menu screen of the process mode, select the group “DTV”.
3) Select the subject “G-BRIGHT” in the group “DTV” and adjust the “G-BRIGHT” setting so that there should be
no bits around the screen.
4) Do the same with the “CB-OFFSET” and “CR-OFFSET” settings.
Now the 0047 PWB on the projector is adjusted for delivery.
Note: There is no need to make the VIDEO input adjustments.
Servicing precautions
If the convergence gets out of spec in servicing the set, call the process mode and select the following group and
subjects.
Group: NOKO
Subject: R-CNV-H, R-CNV-V
subjects.
Group: NOKO
Subject: R-CNV-H, R-CNV-V
G-CNV-H, G-CNV-V
B-CNV-H, B-CNV-V
B-CNV-H, B-CNV-V
(H and V are for horizontal and vertical adjustments, respectively.)
Adjust the above settings to the range of 0 to 4.
Adjust the above settings to the range of 0 to 4.
32
XG-C40XU/XE
Checking the PWB performance
RGB input in trouble
Feed test pattern signal from
PC.
Yes
No
Use specified cable.
Is specified cable connected
between PC and projector?
Yes
No
Power circuit in trouble.
Is supply voltage as specified?
Yes
No
Check the connectors, starting
from the PC input circuit.
Does image appear?
Video input in trouble
Go to "Checking the video unit
circuit".
Through-output in trouble
Through-output circuit in
trouble.
Remote control in trouble
Go to "Checking the remote
control".
Go to "Trouble shooting table
for PC I/F unit ".
TROUBLE SHOOTING TABLE
33
XG-C40XU/XE
Checking the video unit circuit
Yes
No
Check the IC6001 selector switch,
terminal voltage and input circuit.
terminal voltage and input circuit.
Yes
No
Is there video signal input at IC6004?
Check the low-pass and buffer
circuits of Q6009 thru Q6015.
circuits of Q6009 thru Q6015.
Yes
No
Are there signal outputs at pins (6)
and (8) of IC6004?
and (8) of IC6004?
Check IC6004 and its peripheral
circuits (bias).
circuits (bias).
Yes
No
Check the low-pass and buffer circuits
of Q6002 thru Q6008. Is the signal as
specified?
of Q6002 thru Q6008. Is the signal as
specified?
Go to "Checking IC801 (RGB signal
output circuit)".
output circuit)".
Is there video signal output at pin (7)
of IC6001?
of IC6001?
Check Q6002 thru Q6008 and their
peripheral circuits.
peripheral circuits.
Checking the video system
Yes
No
Go to "Lamp fails to light-up".
Yes
No
Is specified voltage fed to EA
connectors?
connectors?
Check the power circuit and its parts.
Yes
No
Are there signal inputs at pins (3) and
(29) of P402?
(29) of P402?
Are there signals at pin (4) of IC401
and pin (4) of IC402?
and pin (4) of IC402?
Are there signal outputs at pins (3)
and (6) of IC816?
and (6) of IC816?
Yes
Check the video unit circuit
(IC6004 and its peripheral
circuits).
(IC6004 and its peripheral
circuits).
No
Check the oscillation circuit
of IC401 and IC402, and
their peripheral circuits.
of IC401 and IC402, and
their peripheral circuits.
Yes
Go to "Checking IC801
(RGB signal output circuit)".
(RGB signal output circuit)".
No
Check IC816, IC806 and
their peripheral circuits as
well as switching circuit.
their peripheral circuits as
well as switching circuit.
Is the lamp on?
TROUBLE SHOOTING TABLE
(Continued)
34
XG-C40XU/XE
Checking IC801 (RGB signal output circuit)
Yes
No
Check the data transfer and other
performance at pins (17) and (18) of
video IC801.
No
Go to "No colour or unusual tone",
"No Y signal" or "Out of sync".
Yes
No
Are there output waveforms at the
emitters of Q1501, Q1502 and
Q1503?
Check Q1501 thru Q1503, SC1501
and their peripheral circuits.
No
Are there output waveforms at the
emitter of Q1505, Q1506 and Q1507?
Check IC1501, Q1505 thru Q1507
and their peripheral circuits.
Yes
Are there RGB output waveforms at
pins (31), (32) and (33) of IC801?
Checking the chroma and Y signals of IC801
(RGB signal output)
(RGB signal output)
Yes
No
Go to "Checking the video unit
circuit".
Yes
No
Check the IC816 switching and their
peripheral circuits. If there is no signal
at pins (9) and (1) of IC816, check 3-D
noise reduction circuit (IC806).
No
Are there signal inputs at pins (20)
(chroma signal) and (21) (Y signal)
of IC801?
Check IC801 and its peripheral
circuits.
Check IC806 (3-D noise reduction
circuit) and its peripheral circuits.
Go to "Checking IC801 (RGB
signal output circuit)".
Yes
Are there signal inputs at pins (12)
(Y signal) and (19)(chroma signal) of
P402?
Are there output waveforms at pins
(3)(chroma signal) and (6)
(Y signal)of IC816?
Go to "Trouble shooting table for PC
I/F unit".
TROUBLE SHOOTING TABLE
(Continued)
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