Sanyo PLC-XP100L, Service Manual

Page: 78 / 156

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Chassis Description
This projector provides a function to get the error information of the projector by using the RS-3C 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.
Diagnosis procedure
1
Connect a RS-3C serial cross cable to CONTROL PORT 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;
Baud rate : 9600 / 1900 bps
Parity check : none
Stop bit : 1
Flow control : none
Data bit : 8
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
ALLPFAIL” 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 S5V power supply on
AV board. Check if the parts connected to S5V power
supply line are defective.
Also the error information may be listed multiple as the
below;
In the above case, 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 mul-
tiple power supply lines even if the failure occurs on the
single place.
In the first case, Check if the parts connected to the
multiple power supply lines are defective. In the later
case, determine a failure point referring to the power
supply flow chart on previous page. Basically, if the
power failure occurs on the upper side of power sup-
ply, the power failure is also detected on lower side of
power supply frequently. If the failure occurs on the lower side of power supply, it is lightly affected to the upper side
of the power supply. In the above case, because the failure occurs on the 6V power supply on the main board, the
failure is also detected on the 3.3V power supply on the ANALOG circuit on the main board.
* See "Power Failure Detection Tree" for further description of the Error Information.
CR ALLPFAIL
000 PJNET, S5V OK
000 AV, S-5V OK
000 AV, S5V NG
000 MAIN, S-5V OK
000 M/A, 9V OK
000 FAN, 16V OK
000 SWFPGA1, 1.2V OK
........ ............... ......... ......
Status
Error Information
(Signal Name)
Error
CR ALLPFAIL
000 PJNET, S5V OK
000 AV, S-5V OK
000 AV, S5V OK
000 MAIN, 6V NG
000 M/A, 9V OK
000 ANALOG, 3.3V NG
000 SWFPGA1, 1.2V OK
........ ............... ......... ......
Error
Diagnosis of Power Failure with RS-232C port