4. TROUBLE SHOOTING
- 78 -
1. Earphone
The Voltage at "ADIN1"
is 0V?
The voltage at R220
is 0.02V ~ 0.25V?
The soldering of J201
is OK?
The soldering of R220
is OK?
The soldering of R223, R225
is OK?
No
No
No
No
No
Yes
Yes
Yes
Yes
Yes
Detection problem
Resolder the
R223, R225.
Resolder the J201.
The ABB is out of order.
Change the board.
Resolder the R220.
The ABB is out of order.
Change the board.
2. Sending Path problem
Resolder the
R223, R225.
Resolder
the C223, R233.
The ABB is out of order.
Change the board.
Set audio par
The voltage at R218
is 1.1V ~ 1.3V?
The soldering of C223,
R233 is OK?
The soldering of J201 is OK?
The earphone is OK?
A few tens or hundreds
of mV of signals at C223
are measured?
Yes
Yes
Yes
Yes
Yes
No
No
No
No
No
t of the test
equipment to the echo mode.
Resolder
The U201.
Change the
Earphone.
The ABB is out of order.
Change the board.
Содержание L1150
Страница 1: ...Service Manual Model L1150 Service Manual L1150 P N MMBD0034601 Date June 2004 Issue 1 0 ...
Страница 3: ......
Страница 18: ...3 H W Circuit Description 17 Figure 1 Receiver Part Block Diagram ...
Страница 42: ...3 H W Circuit Description 41 A BaseBand Components Component Side ...
Страница 43: ...3 H W Circuit Description 42 B BaseBand Components Keypad Side C Digital Baseband DBB Processor ...
Страница 51: ...4 TROUBLE SHOOTING 50 BaseBand Part Troubleshooting 4 1 Baseband Components Component Side 4 TROUBLE SHOOTING ...
Страница 102: ...5 DISASSEMBLY INSTRUCTION 101 5 DISASSEMBLY INSTRUCTION 2 1 1 2 ...
Страница 103: ...5 DISASSEMBLY INSTRUCTION 102 1 2 3 ...
Страница 104: ...5 DISASSEMBLY INSTRUCTION 103 2 1 1 2 ...
Страница 105: ...5 DISASSEMBLY INSTRUCTION 104 3 ...
Страница 106: ...5 DISASSEMBLY INSTRUCTION 105 ...
Страница 113: ...7 BLOCK DIAGRAM 112 Baseband Part 7 BLOCK DIAGRAM The Block Diagram of the Baseband Part ...
Страница 122: ... 121 9 PCB LAYOUT ...
Страница 123: ... 122 9 PCB LAYOUT ...
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