Sharp PG-MB60X (serv.man13) Service Manual ▷ View online
41
PG-MB60X
Checking of Video input
Send composite VIDEO
signals to INPUT3. Use keys
on the main unit or remote
control to select INPUT3.
signals to INPUT3. Use keys
on the main unit or remote
control to select INPUT3.
Is picture signal input to pin
(1) of IC3103?
(1) of IC3103?
Check the VIDEO-IN signal line
of Q3104 and soldering of
J3101.
of Q3104 and soldering of
J3101.
Is input signal SECAM?
Check the peripheral circuits of
IC3103 and color system
malfunctions.
IC3103 and color system
malfunctions.
Are picture signals input to
pins (39) and (41) of IC3103?
pins (39) and (41) of IC3103?
Do pulse-shaped waveforms appear
at pins (15) and (16) of IC3105?
at pins (15) and (16) of IC3105?
Check IC3105 and peripheral
circuits.
circuits.
Are picture signals output
from pins (21), (22) and (23)
of IC3103?
from pins (21), (22) and (23)
of IC3103?
Do pulse-shaped waveforms appear
at pins (13) and (14) of IC3103?
at pins (13) and (14) of IC3103?
Check IC3103 and peripheral
circuits.
circuits.
Are picture signals input to
pins (67), (68) and (68), and
output from pins (35), (37)
and (38) of IC3101?
pins (67), (68) and (68), and
output from pins (35), (37)
and (38) of IC3101?
Do pulse-shaped waveforms appear
at pins (55) and (56) of IC3101?
at pins (55) and (56) of IC3101?
Check IC3101 and peripheral
circuits.
circuits.
The I2C bus line does
not function normally.
Check IC2201, IC2003,
IC2005, IC2006, IC2007
and their peripheral
circuits.
Check if IC connected to
I2CBUS functions
normally.
not function normally.
Check IC2201, IC2003,
IC2005, IC2006, IC2007
and their peripheral
circuits.
Check if IC connected to
I2CBUS functions
normally.
NO
YES
YES
NO
NO
NO
YES
YES
NO
NO
YES
YES
NO
NO
YES
YES
1
2
Checking of
S-Video input
Send S terminal (Y and C) signals to INPUT4.
Use keys on the main unit or remote control to
select INPUT4.
Use keys on the main unit or remote control to
select INPUT4.
Are picture signals output from pins (43) and
(44) of IC3103?
(44) of IC3103?
Check the soldering of J3101.
NO
YES
2
42
PG-MB60X
Checking of Sync signal
Are HV sync signals sent to
pins (1) and (6) of IC4010?
pins (1) and (6) of IC4010?
Check IC4008 and peripheral
circuits.
circuits.
Are HV sync signals sent to
pins (22) and (23) of IC3002?
pins (22) and (23) of IC3002?
IC4008 and IC4010 are
defective.
defective.
Are sync signals sent to pins
(28) and (29) of IC3002?
(28) and (29) of IC3002?
Is a clock of 27MHz sent to pin
(42) of IC3002?
(42) of IC3002?
Check X3001 and
peripheral circuits.
peripheral circuits.
Do signals of pins (21) and (22)
of IC3002 change?
of IC3002 change?
The I2C bus line does not
function normally.
Check IC2201, IC2003,
IC2005, IC2006, IC2007
and their peripheral
circuits.
Check if IC connected to
I2C bus functions
normally.
function normally.
Check IC2201, IC2003,
IC2005, IC2006, IC2007
and their peripheral
circuits.
Check if IC connected to
I2C bus functions
normally.
Check IC3002 and peripheral
circuits.
circuits.
Are sync signals sent to pins
(65) and (64) of IC3005?
(65) and (64) of IC3005?
IC3005 and peripheral circuits
are
are
defective.
Is the timing of vertical and
horizontal sync signals
correct?
horizontal sync signals
correct?
Sync signal is normal.
Is the signal generator (input
source) correct?
source) correct?
IC2003 and peripheral circuits
are
are
defective.
Set the signal source correctly.
NO
YES
NO
YES
NO
NO
YES
YES
NO
YES
NO
YES
YES
NO
YES
NO
43
PG-MB60X
Checking RS-232C
Communication is disabled even though
connecting the control PC and projector
with a RS-232C cable.
connecting the control PC and projector
with a RS-232C cable.
Is the connecting cable connected
correctly? (cross cable)
correctly? (cross cable)
Replace the connecting cable.
Does pin (8) of IC8002 receive a signal?
Check R8002 and the peripheral circuits of SC8001.
Does pin (4) of IC8202 receive a signal?
Check the peripheral circuits of IC8002.
Do pin (3) of IC8202 output a signal?
Check IC8202 and the peripheral circuits of the
microprocessor IC8001.
microprocessor IC8001.
Does pin (106) of IC2201 receive a
signal?
signal?
Check the peripheral circuits of the microprocessor
IC8001 and IC2201.
IC8001 and IC2201.
Do pin (105) of IC2201 output a signal?
Check the peripheral circuits of the microprocessor
IC2003 and IC2201.
IC2003 and IC2201.
Check the peripheral circuits of the
microprocessor IC8001.
microprocessor IC8001.
YES
NO
YES
NO
YES
NO
NO
NO
NO
YES
YES
YES
YES
43
PG-MB60X
Checking RS-232C
Communication is disabled even though
connecting the control PC and projector
with a RS-232C cable.
connecting the control PC and projector
with a RS-232C cable.
Is the connecting cable connected
correctly? (cross cable)
correctly? (cross cable)
Replace the connecting cable.
Does pin (8) of IC8002 receive a signal?
Check R8002 and the peripheral circuits of SC8001.
Does pin (4) of IC8202 receive a signal?
Check the peripheral circuits of IC8002.
Do pin (3) of IC8202 output a signal?
Check IC8202 and the peripheral circuits of the
microprocessor IC8001.
microprocessor IC8001.
Does pin (106) of IC2201 receive a
signal?
signal?
Check the peripheral circuits of the microprocessor
IC8001 and IC2201.
IC8001 and IC2201.
Do pin (105) of IC2201 output a signal?
Check the peripheral circuits of the microprocessor
IC2003 and IC2201.
IC2003 and IC2201.
Check the peripheral circuits of the
microprocessor IC8001.
microprocessor IC8001.
YES
NO
YES
NO
YES
NO
NO
NO
NO
YES
YES
YES
YES
