Sanyo PLC-XP57L, Service Manual

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Chassis Description
Diagnosis of power failure with RS-232C port
Diagnosis procedure
This projector provides a function to get the error information of the projector by using the RS-232C serial port for
the power failure diagnosis.
The further error information of the power failure and fan failure can be found out by using this function.
3
Turn on the projector. Check that the LED shows a power
failure. (All the LEDs except LAMP LED are blinking)
4
Type a diagnosis command of the power failure " CR ALLP-
FAIL " and press a "ENTER" key within 1 second on the
command window of the software.
The error information will be listed on the window as the
right.
Check the status column. If "NG" is listed, the power failure
occurs on its signal line (Power Line Name).
In case of the right table, this error information means that
the power failure occurs on the S-5V power supply on the
analog circuit on the main board. Check if the parts con-
nected to S-5V power supply line are defective.
Also the error information may be listed multiple as the
below;
In the above case, 2 kinds of causes are considered.
One is the power failure occurs on the multiple places at the
same time, other is a power failure affects multiple power
supply lines even if the failure occurs on the single place.
In the former case, check if the parts connected to the mul-
tiple power supply lines are defective. In the latter case,
determine a failure point referring to "Power failure detec-
tion tree" on the previous page. Basically, if the power fail-
ure occurs on the upper side of power supply, the power
failure is also detected on lower side of power supply fre-
quently. If the failure occurs on the lower side of power sup-
ply, it is lightly affected to the upper side of the power sup-
ply. In the above case, because the failure occurs on the 6V
power supply on the analog circuit on the main board, the
failure is also detected on the 3.3V and 5V power supply on
the ANALOG circuit on the main board.
Baud rate : 19200 bps
Parity check : none
Stop bit : 1
Flow control : none
Data bit : 8
CR ALLPFAIL
000 PJNET, S5V OK
000 AV, -5V OK
000 AV, S5V OK
000 MAIN, S-5V NG
000 M/A, 12V OK
000 FAN, 16V OK
000 SWFPGA, 1.2V OK
--- --- --- --
--- --- --- --
000 ANALOG, 1.8V OK
000 FPGA, 1.5V OK
000 GAMMA, 15.5V OK
000 MAIN, 6V NG
000 MAIN, 3.3V OK
000 ANALOG, 3.3V NG
000 ANALOG, 5V NG
000 GAMMA, 1.8V OK
--- --- --- --
1
Connect a RS-232C serial cross cable to SERIAL PORT IN on the projector and serial port on the PC.
2
Launch a communication software "Hyper terminal" provided with PC and setup the communication condition as
follows;
* See "Power Failure Detection Tree" for further description of the Error Information.
Error Information
(Signal name)
Status Error
Error