Panasonic PT-TW343RE (serv.man5) Service Manual ▷ View online
-61-
Troubleshooting
No picture
Follow the procedures below.
No picture with all input
sources
Check signal adjustment loop and LCD driving loop;
Check power supply circuit S16V and peripheral circuit.
Check IC1001, IC8001 and peripheral circuit.
No picture with PC2 input
source only
Check if the HV Sync signal of IC4009's 8th/11th pin is normal;
Check if the IC1001's peripheral circuit, R1191/R1194 have H/V
Sync.
Check PC/AV source selecting loop and processing loop;
Check IC4009 and peripheral circuit.
No picture with all
computer input sources
Yes
Yes
No
No
No
No
Check AV source selecting loop and decoding loop;
S-Video source
Check S-video sign (Y/C).
Check if IC1001's peripheral capacitor C1803 has signal.
Compound video source
Check the composite video source (video).
Check if IC1001's peripheral capacitor C1805 has signal.
No picture with video
input sources
Yes
Check IC1001, IC4009 and peripheral circuit.
Check if the HV Sync signal of IC4009's 6th/3rd pin is normal;
Check if the IC1001's peripheral circuit, R1051/R1193 have H/V
Sync.
No picture with PC1 input
source only
Yes
Check IC1001<Scaler> and peripheral circuit.
No picture with HDMI
input sources
Yes
Yes
No
-62-
Troubleshooting
No audio output
Follow the procedures below.
Check IC5202 and peripheral circuit.
Check if the power supply of
L5007and L5008 reaches 5.5V
Yes
Check related circuits of Q50011/Q5010/Q5005/Q5001.
Check the voltage of pin
4 and pin9 is more than
3V.
No
1. Check if the loudspeaker cable is plugged or broken.
2. Check if the loudspeaker is damaged.
Check pin 43 and 46 of
IC5007 have audio signal
output.
No
Yes
-63-
Troubleshooting
Shutdown system
This projector provides the shutdown function to set into the standby mode immediately for product safety when
the projector has the fan operation error or lamp lightning error.
LED indication status
Shutdown detection
Probable cause
OSD warning
Not lighting or flashing
Power supply block
Fuse : Rated 6.3A
Blown out of fuse
(with another reason)
–
Thermal switch
Over 120ºC
Blown out of thermal fuse (with another
reason)
Check usage environment
–
Ballast block
Fuse
Intake duct clogging
Ballast block error
–
ON(G)/STANDBY(R) LED
blinks in Orange
WARNING LED blinks in
Red
Lamp cover switch
Shutdown immediately if switch
is OFF
Lamp cover is not installed securely
–
Lamp igniting error
Lamp error/burning
–
ON(G)/STANDBY(R) LED
blinks in Orange
WARNING LED is Off
Intake air temperature sensor
Intake air temperature error
Filter clogging
High temperature of environment
Ventilation holes are blocked
–
Internal temperature sensor A
Internal temperature sensor A error
Filter clogging
High temperature of environment
Ventilation holes are blocked
Internal temperature sensor B
Internal temperature sensor B error
Filter clogging
High temperature of environment
Ventilation holes are blocked
–
ON(G)/STANDBY(R) LED
lights in Orange
WARNING LED is Off
Each FAN LOCK signal
No signal
FAN A (F3001/F3002)
Connector disconnection
Fan rotation error
–
Each FAN LOCK signal
No signal
FAN B (F3003/F3004)
Connector disconnection
Fan rotation error
–
Each FAN LOCK signal
No signal
FAN C (F3005)
Connector disconnection
Fan rotation error
–
Detects Power error signal "P-FAIL". Internal power supply line error
–
ON(G)/STANDBY(R) LED
lights in Orange
WARNING LED lights in
Red
Iris operation error
Iris unit error
Connector disconnection
–
WARNING LED lights in
Red
Lamp runtime
Over 6000 hours
Lamp replacement is necessary
Indicate lamp replacing icon
WARNING LED blinks in
Red
Lamp runtime
Over 6600 hours (It will auto-
matically shutoff in 10 min.)
Lamp runtime is over
Indicate lamp replacing icon
-64-
Troubleshooting
Error log
This projector provides the error history log function. To
check the logs, you need to enter the service mode and
select Group No. "220" and item No. "0" to "49". The error
code is displayed on the data column. The description of
the error code is listed on the table below.
* How to enter the service mode and select the group, item
and data value, see "Electrical Adjustment".
1. Enter the Service Mode, and select Group No. "220" and Item No. "50".
2 The history log will be reset when the data value is set to "10". The value automatically returns to "0".
Group
No.
Item
No.
Data
(Error code)
220
0
1
2
3
:
:
49
1001
← Latest error code
1002
2000
2001
:
:
2201
Error
Error
code
Error information
0
Normal
Power error
1000
Main Power supply error
1001
FAN A/B Power supply error (F3001/F3002/F3003/F3004)
1002
FAN C Power supply error (F3005)
1003
IRIS Power supply error
Power management error
1100
Shutdown on Power management (Depending on the setting)
External temp error
2000
Intake temperature error. Detects error on Intake temp sensor
2001
Intake temperature error. Detects abnormal value on Intake temp sensor
Internal temp A error
2100
Internal temperature error. Detects error on temp sensor A
2101
Internal temperature error. Detects abnormal value on Iemp sensor A
Internal temp B error
2200
Internal temperature error. Detects error on temp sensor B
2201
Internal temperature error. Detects abnormal value on temp sensor B
Lamp error
3000
Lamp on failure
3100
Lamp usage time is over
How to reset the error log
Getting error log by the service tool
If the projector cannot be turned on, the error log can be gotten by the service tool.
Please download the file "Error Log Acquisition Tool" from the projector service web site.
Click on the first or last page to see other PT-TW343RE (serv.man5) service manuals if exist.