MOTOROLA CONFIDENTIAL - PROPRIETARY
6881036B20
November 20, 2000
49
Level 3 Service Manual
Troubleshooting
000796-O
Figure 35. Frequency Error
Rephasing the phone
using Gate22.
Is It OFF frequency ?
START
END
In test mode digit 982#,
110062#, 1215#, 41#.
Is there noise on
continiuos TX frequency
Check
U350
,
U200
Note 1 or Faulty.
Check the presence and the
correct value of:
VREF on C919 from
U900
,
RF__V1 on C217 from
Q201
RF___V2 on C215 from
Q202
.
Check
U200
Note 1 or
Faulty.
YES
NO
NO
YES
Is there noise on
C225
(13Mhz) ?
Check
CR248
, relative
components, and
U200
Note 1 or Faulty.
Is the frequency
on
C225
13 Mhz?
Check
Y200
then
U200
Note 1 or Faulty.
YES
YES
YES
NO
NO
NO
Is the frequency
on
R2477
26 Mhz?
Note 1: Check components for correct
orientation, cold solder joints, physical
damage, and functionallity.
In most cases, use a test
PCB as a reference.
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: ......