Panasonic EB-X700, Руководство по обслуживанию

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FAULT FINDING
PMCE041201C8 Section 8 Provisional Issue
Service Manual – 7 – Revision 1
8.2.4 OMAP Controlled Hardware Fault from Initialization
Fault
Code
Symptoms Root Cause Debugging Action
I No related default voltage
supply to OMAP Voltage supply shorting;
or bad S/M power IC; or
bad Companion IC Check VDBB/TP324 (1.8V), V28/
TP330 (2.8V), VBB3/TP342 (1.5V);
If one or more than one of above
voltages are not present, use an Ohm
meter to check possible shorting to
GND.
If no VBB3, replace U300 Companion
IC;
If no V28, replace U304 S/M power
J OMAP fails to run up with
13MHz clock and AP-
RST released. 32 kHz crystal failure; or
OMAP flash code
corrupted; or OMAP flash
failure. Check TP218 for 32KHz clock,
replace 32kHz crystal Y200 if the
clock is not present;
Reload OMAP code to OMAP flash
memory;
If reloading failed, replace OMAP
memory chip U203.
K Phone fails to
communicate with
PhoneTool software via
USB link. OMAP flash code
corrupted; or OMAP flash
failure; or broken USB
link. Reload OMAP code to OMAP flash
memory;
If reloading failed, replace OMAP
memory chip U203;
Check VUSB/TP340 shorting and
voltage, replace S/M power if no
shorting and no VUSB voltage;
Check possible broken USB physical
link from External I/O to R250, R251
and R253 with an Ohm meter.
L After the phone powers
on, the main LCD
displays a frozen image. SIM card is not inserted
or damaged or SD/SIM
card board is damaged. Check if SIM card is inserted. Insert a
known good SIM card. Replace SD/
SIM card board.
M Main LCD and Sub LCD
backlighting not turned on Refer to Fault Code H Refer to the Fault Code H
N Main LCD displays
nothing or something
unusual. Bad main LCD module or
bad LCD module
connection. Check for short circuits or damage to
Main Board flexistrip connector to
Main LCD.
Check for shorts or damage to main
LCD connector. If no damage found,
replace LCD module.
O Sub LCD display is blank
or corrupt. Bad Sub LCD module or
connection. Check for short circuits or damage to
Main Board flexistrip connector to
Sub LCD.
Check for shorts or damage to Sub
LCD connector. If no damage found,
replace Sub LCD module.
P Camera viewfinder mode
displays unusual or
unstable image. Bad camera module or
connection. Check for short circuits or damage to
Main Board flexistrip connector to
camera.
Check for shorts or damage to
camera connector. If no damage
found, replace camera module.
Q SD card not working. Bad SD card connection
or damaged SD/SIM card
board. Check for shorting or damage on
Main Board connector to SD/SIM
board.
Check for shorting or damage to SD/
SIM PCB. If no damage found,
replace SD/SIM PCB.
R IrDA is not working. Bad IrDA connection or
damaged IrDA module. Check for shorting or damage to Main
Board connector to IrDA module. If no
damage found, replace IrDA module
DS103.