Panasonic PT-LW330 / PT-LW280 / PT-LB360 / PT-LB330 / PT-LB300 / PT-LB280 (serv.man5) Service Manual ▷ View online
-65-
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
-66-
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
–
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
–
ON(G)/STANDBY(R) LED
lights in Orange
WARNING LED lights in
Red
Iris operation error
Iris unit error
Connector disconnection
–
ON(G)/STANDBY(R) LED
lights in Orange
WARNING LED is Off
lights in Orange
WARNING LED is Off
Detects Power error signal "P-FAIL". Internal power supply line error
–
ON(G)/STANDBY(R) LED
lights in Red
WARNING LED blinks in
Red
Lamp runtime
Over 6600 hours (It will auto-
matically shutoff in 10 min.)
Use of lamp runtime over
Indicate lamp replacing icon
-67-
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
-68-
Serial control
<SERIAL IN> terminal
The <SERIAL IN> terminal of the projector conforms with RS--232C so that the projector can be connected to
and controlled from a computer.
J
Connection
J
Pin assignments and signal names
D-Sub 9-pin (female)
Outside view
Pin No.
Signal names
Contents
⋌
⋏
⋇
⋋
—
NC
②
TXD
Transmitted data
②
RXD
Received data
②
—
NC
②
GND
Earth
②
—
NC
②
CTS
Connected internally
②
RTS
②
—
NC
J
Communication conditions (Factory default)
Signal level
RS-232C-compliant
Character length
8 bits
Sync. method
Asynchronous
Stop bit
1 bit
Baud rate
19,200 bps
X parameter
None
Parity
None
S parameter
None
D-Sub 9 pin (male)
D-Sub 9 pin (female)
Connecting terminals on projector
Computer
Communication cable (straight)
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