Sharp XG-MB70X (serv.man13) Service Manual ▷ View online
41
XG-MB70X
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
J3001.
of Q3104 and soldering of
J3001.
Is input signal SECAM?
Check the peripheral circuits of
C3103 and color system
malfunctions.
C3103 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 IC3105?
(44) of IC3105?
Check the soldering of J3001.
NO
YES
2
42
XG-MB70X
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
I2CBUS functions
normally.
function normally.
Check IC2201, IC2003,
IC2005, IC2006, IC2007
and their peripheral
circuits.
Check if IC connected to
I2CBUS 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
XG-MB70X
Checking the autofocus
Is dust, dirt or damage present
on the auto focus sensor
cover?
on the auto focus sensor
cover?
Remove the dust and dirt, or
replace.
replace.
Are voltages of 3.3V, 1.5V and
2.8V applied to pin (4) of X5001,
pin (94) of IC5003 and pin (5) of
IC5008 respectively?
2.8V applied to pin (4) of X5001,
pin (94) of IC5003 and pin (5) of
IC5008 respectively?
Check the power supply circuit
and its peripheral circuits.
and its peripheral circuits.
Is a clock (49MHz) output from
pin (3) of X5001?
pin (3) of X5001?
X5001 is defective.
Is a clock (12.27MHz) output
from pin (108) of X5003?
from pin (108) of X5003?
Does the signal of pin (6) of
IC5004 change right after 3.3V
is applied?
IC5004 change right after 3.3V
is applied?
Check IC5003.
Check IC5004.
Is a clock sent to pin (93) of
IC5003?
IC5003?
Is the camera FPC properly
connected to the connector?
connected to the connector?
Connect properly.
The camera is defective.
When auto focus is performed,
does pin (121) of IC5003
change?
does pin (121) of IC5003
change?
Check IC5005 and IC5006.
Check the motor drive circuit.
NO
YES
NO
YES
NO
YES
NO
NO
YES
YES
NO
NO
YES
YES
NO
YES
44
XG-MB70X
Checking the LAN
LAN communication is disabled even
though connecting the control PC with a
LAN cable. The LINK LED (green) does
not light up.
though connecting the control PC with a
LAN cable. The LINK LED (green) does
not light up.
Are the connection of connecting cable
and the settings of IP address, sub-net
address and default gateway correct?
and the settings of IP address, sub-net
address and default gateway correct?
Check the connecting cable and LAN settings. If the
LAN settings are unknown, contact the network
administrator.
If the network settings cannot be saved, replace
IC8003 (EEP ROM) as it may be defective.
LAN settings are unknown, contact the network
administrator.
If the network settings cannot be saved, replace
IC8003 (EEP ROM) as it may be defective.
Note: When IC8003 (EEP ROM) is replaced, the MAC
address returns to default. Refer to "Resetting
after replacing IC8003 (EEP ROM)" to reset.
after replacing IC8003 (EEP ROM)" to reset.
Are the network device (e.g. Hub)
between the control PC and XG-MB70X
and cable normal?
between the control PC and XG-MB70X
and cable normal?
Repair defective parts in the network.
When data is sent from the control PC, do
pins (30) and (31) of IC8201 (PHY
receiver) receive signals?
pins (30) and (31) of IC8201 (PHY
receiver) receive signals?
Check the peripheral circuit of J8201 (RJ-45 jack
with built-in transformer).
with built-in transformer).
Check the PHY receiver IC8201 and the
peripheral circuits of the microprocessor
IC8001.
peripheral circuits of the microprocessor
IC8001.
YES
NO
YES
NO
YES
NO
YES
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