MOTOROLA CONFIDENTIAL - PROPRIETARY
6881036B20
November 20, 2000
43
Level 3 Service Manual
Troubleshooting
000786-O
Figure 27. No Ring Tone
START
1. Install correct software
and flex file.
2. Reset UUT by entering
57#.
3. If malfunction persists,
check
U900
and
U800
.
See Note 1
No ringer function?
Place UUT into manual
test mode, then enter:
432# (change audio path),
1556# (generate tone),
4707# (set audio volume)
2.7V is present on
Q903 Pin 4
?
No: check
U900
.
Yes: check
Q903
.
See Note 1
YES
YES
NO
NO
Ring signal is
present on Alert
Terminal Pin
ALRT_OUT?
Check
U900
.
See Note 1
Check for intermittent
fault at
LS1
.
NO
YES
1. Install correct software
and flex file.
2. Reset UUT by entering
57#.
3. If malfunction persists,
continue.
Approximately 3V
is present on
Q903
Pins 1
,
2
,
5
,
6
?
Note 1: Check components for correct
orientation, cold solder joints, physical
damage, and functionallity.
Summary of Contents for 38C V100
Page 1: ...Level 3 Service Manual Model V100 GSM Technology Product Family 38C Personal Communicator ...
Page 2: ......
Page 73: ...V100 BOARD LAYOUT PAGE 1 2 ...
Page 74: ...V100 BOARD LAYOUT PAGE 2 2 ...
Page 77: ...V100 CONNECTOR SCHEMATICS ...
Page 78: ...V100 DISPLAY SCHEMATICS ...
Page 79: ...V100 FM SCHEMATICS ...
Page 81: ......
Page 83: ......