Sharp XG-P10XE (serv.man2) Service Manual ▷ View online
34
XG-P10XE
TROUBLE SHOOTING TABLE
(Continued)
Checking the video unit circuit
Yes
No
Check the IC401 selector switch,
terminal voltage and input circuit.
terminal voltage and input circuit.
Yes
No
Is there video signal input at IC4001?
Check the low-pass and buffer
circuits of Q4002 thru Q4012.
circuits of Q4002 thru Q4012.
Yes
No
Are there signal outputs at pins (6)
and (8) of IC4001?
and (8) of IC4001?
Check IC4001 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 IC401?
of IC401?
Check Q4007 thru Q4009 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 (7), (9)
and (25) of SC401?
and (25) of SC401?
Are there signals at pin (4) of IC6011?
Are there signal outputs at pins (7) of
IC6010 and (5) of IC6009?
IC6010 and (5) of IC6009?
Yes
Check the video unit circuit
(IC4501 and IC4001 and its
peripheral circuits).
(IC4501 and IC4001 and its
peripheral circuits).
No
Check the oscillation circuit
of IC6011, and their
peripheral circuits.
of IC6011, and their
peripheral circuits.
Yes
Go to "Checking IC801
(RGB signal output circuit)".
(RGB signal output circuit)".
No
Check IC6001, IC6010,
IC6009 and their peripheral
circuits as well as switching
circuit.
IC6009 and their peripheral
circuits as well as switching
circuit.
Is the lamp on?
35
XG-P10XE
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 pin
(1) of IC6803, IC6804, IC6805?
(1) of IC6803, IC6804, IC6805?
Check IC6802, IC6803, IC6804,
IC6805 and their peripheral circuits.
IC6805 and their peripheral circuits.
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 IC6009 and IC6010
switching and their peripheral circuits. If
there is no signal at pins (1) of IC6010
and pin (16) of IC6009 check 3-D noise
reduction circuit (IC8001).
switching and their peripheral circuits. If
there is no signal at pins (1) of IC6010
and pin (16) of IC6009 check 3-D noise
reduction circuit (IC8001).
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 (7), (9)
and (25) of SC401?
and (25) of SC401?
Are there output waveforms at pins
(7) of IC6010 (chroma signal) and
(5), (Y signal)of IC6009?
(7) of IC6010 (chroma signal) and
(5), (Y signal)of IC6009?
Go to "Trouble shooting table for PC
I/F unit".
I/F unit".
36
XG-P10XE
TROUBLE SHOOTING TABLE
(Continued)
Checking IC6001 (3-D noise reduction circuit)
and its peripheral circuits
and its peripheral circuits
Yes
No
Check the buffer circuit of Q6004 thru
Q6006 as well as Q6001 thru Q6003.
Q6006 as well as Q6001 thru Q6003.
Yes
No
Are there signal outputs at pins (55)
(Y signal) and (51)(chroma signal) of
IC6001?
(Y signal) and (51)(chroma signal) of
IC6001?
Check IC8003, IC8002 (memory) and
their peripheral circuits.
their peripheral circuits.
Yes
No
Are there signal outputs at the
emitters of Q6008 (Y signal) and
Q6009 (chroma signal)?
emitters of Q6008 (Y signal) and
Q6009 (chroma signal)?
Check the low-pass circuit around
Q6008, Q6007 and Q6009.
Q6008, Q6007 and Q6009.
Check IC6009, IC6010 and IC801
(RGB signal output circuit).
(RGB signal output circuit).
Are there signal inputs at pins (40)
(Y signal) and (45)(chroma signal) of
IC6001?
(Y signal) and (45)(chroma signal) of
IC6001?
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?
37
XG-P10XE
TROUBLE SHOOTING TABLE
(Continued)
No or unusual Y signal
Yes
No
Go back to the signal processing
block.
block.
No
Check IC801 and its peripheral
circuits.
circuits.
Yes
No
Check IC803 and its peripheral
circuits as well as IC805 (AGC).
circuits as well as IC805 (AGC).
Yes
Check IC803 and its peripheral
circuits.
circuits.
Is there Y signal output at pin (17) of
IC803?
IC803?
Is there Y signal output at pin (40) of
IC801?
IC801?
Is there Y signal input at pin (21) of
IC801?
IC801?
No or unusual horizontal sync
Yes
No
Check IC801 and its peripheral
circuits.
circuits.
Yes
No
Is there horizontal sync pulse output
at pin (9) of IC803?
at pin (9) of IC803?
Check the pulse shaping circuit of
IC802 and IC803.
IC802 and IC803.
Go to "Trouble shooting table for PC
I/F unit".
I/F unit".
Is there horizontal sync pulse output
at pin (56) of IC801?
at pin (56) of IC801?
No or unusual vertical sync
No
Check IC801 and its peripheral
circuits.
circuits.
Yes
Go to "Trouble shooting table for
PC I/F unit".
PC I/F unit".
Is there vertical sync pulse output at
pin (4) of IC801?
pin (4) of IC801?
Click on the first or last page to see other XG-P10XE (serv.man2) service manuals if exist.