Read Sharp XG-NV5XE (serv.man40) Service Manual online
29
XG-NV5XE
XG-NV5XM
XG-NV5XM
TROUBLE SHOOTING TABLE
Checking the PWB performance
RGB input in trouble
Feed test pattern signal from
PC.
PC.
Yes
No
Use specified cable.
Is specified cable connected
between PC and projector?
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.
from the PC input circuit.
Does image appear?
Video input in trouble
Go to "Checking the video unit
circuit".
circuit".
Through-output in trouble
Through-output circuit in
trouble.
trouble.
Remote control in trouble
Go to "Checking the remote
control".
control".
Go to "Trouble shooting table
for PC I/F unit ".
for PC I/F unit ".
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XG-NV5XE
XG-NV5XM
XG-NV5XM
TROUBLE SHOOTING TABLE
(Continued)
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?
31
XG-NV5XE
XG-NV5XM
XG-NV5XM
TROUBLE SHOOTING TABLE
(Continued)
Checking IC801 (RGB signal output circuit)
Yes
No
Check the data transfer and other
performance at pins (17) and (18) of
video IC801.
performance at pins (17) and (18) of
video IC801.
No
Go to "No colour or unusual tone",
"No Y signal" or "Out of sync".
"No Y signal" or "Out of sync".
Yes
No
Are there output waveforms at the
emitters of Q1501, Q1502 and
Q1503?
emitters of Q1501, Q1502 and
Q1503?
Check IC1501 (amplifier), IC1502
(RGB offset) and their peripheral
circuits.
(RGB offset) and their peripheral
circuits.
No
Are A/D outputs of IC1504, IC1505
and IC1506 as specified?
and IC1506 as specified?
Check the VCLK, IC1504, IC1505,
IC1506 and their peripheral circuits.
IC1506 and their peripheral circuits.
Yes
Are there RGB output waveforms at
pins (31), (32) and (33) of IC801?
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".
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).
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?
(chroma signal) and (21) (Y signal)
of IC801?
Check IC801 and its peripheral
circuits.
circuits.
Check IC806 (3-D noise reduction
circuit) and its peripheral circuits.
circuit) and its peripheral circuits.
Go to "Checking IC801 (RGB signal
output circuit)".
output circuit)".
Yes
Are there signal inputs at pins (12)
(Y signal) and (19)(chroma signal) of
P402?
(Y signal) and (19)(chroma signal) of
P402?
Are there output waveforms at pins
(3)(chroma signal) and (6)
(Y signal)of IC816?
(3)(chroma signal) and (6)
(Y signal)of IC816?
Go to "Trouble shooting table for PC
I/F unit".
I/F unit".
32
XG-NV5XE
XG-NV5XM
XG-NV5XM
TROUBLE SHOOTING TABLE
(Continued)
Checking IC806 (3-D noise reduction circuit)
and its peripheral circuits
and its peripheral circuits
Yes
No
Check the buffer circuit of Q814 thru
Q816 as well as Q903 thru Q906.
Q816 as well as Q903 thru Q906.
Yes
No
Are there signal outputs at pins (55)
(Y signal) and (51)(chroma signal) of
IC806?
(Y signal) and (51)(chroma signal) of
IC806?
Check IC806, IC807 (memory) and
their peripheral circuits.
their peripheral circuits.
Yes
No
Are there signal outputs at the
emitters of Q817 (Y signal) and Q910
(chroma signal)?
emitters of Q817 (Y signal) and Q910
(chroma signal)?
Check the low-pass circuit around
Q817, Q907 and Q910.
Q817, Q907 and Q910.
Check IC816 and IC801 (RGB signal
output circuit).
output circuit).
Are there signal inputs at pins (40)
(Y signal) and (45)(chroma signal) of
IC806?
(Y signal) and (45)(chroma signal) of
IC806?
No colour or unusual tone (NTSC, PAL)
Yes
No
Go back to the signal processing
block.
block.
Yes
No
Check the oscillation of X801 and
X802, and their peripheral circuits.
X802, and their peripheral circuits.
Check IC803, IC814 and their
peripheral circuits.
peripheral circuits.
Are there signal outputs at pins
(46)(R-Y) and (45)(B-Y) of IC801?
(46)(R-Y) and (45)(B-Y) of IC801?
Is there chroma signal input at pin
(20) of IC801?
(20) of IC801?