Panasonic EBX70 - CELL PHONE, Service Manual

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FAULT FINDING
Issue 1 Section 8 PMCD030901C8
Revision 0 – 48 – Service Manual
8.2. BGA Fault Identification
The following process is recommended when attempting to identify a ‘no power-on’ fault or ‘intermittent power-off’ fault that
could be attributed to a BGA device.
Figure 8.5: BGA Fault Identification
The following signals or levels should be present on the or SYREN BGA device. If the signals are found not to be
present, and the procedure in Figure 8.5: has been followed, then suspect the SYREN BGA device,
Fault Code - Q or
BGA device, Fault Code R , as detailed below:
Error Code Fault Action Fault Code
System Error Software corruption. C
UNDEFD HANDLR D
SWI Attempt to download latest software. If E
PRE_FETCH unsuccessful, suspect faulty F
DATA_ABORT device G
INTERUPT Error H
Run WinModo in "Gang
Write" mode.
Suspect FLASH.
Suspect
BGA device.
Refer to Error Display
Codes table (below).
NO
YES
NO
YES
NO
YES
YES
NO
NO
YES
FAULT CODE: B
FAULT CODE: A
Refer to BASIC TESTS table
(below). Repair and re-calibrate
where necessary.
Does the
phone start
signalling?
Was the
software downloaded
successfully?
NO
Does the
phone work in-call?
YES
YES
Good phone.
Has the
phone been
calibrated?
NO
YES
NO
START
Does the
phone power on ?
Enable 'Set Error Display'
and re-power phone in
Handheld mode.
Does the
phone power on
in Handheld
mode?
Does the
phone power off
intermittently?
Is an
error message
displayed on the
phone?
Attempt to power on the
phone from the Service
Channel Box.
Download latest software
to phone.
Perform Calibration procedures.
YES
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