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.
Summary of Contents for L1150
Page 1: ...Service Manual Model L1150 Service Manual L1150 P N MMBD0034601 Date June 2004 Issue 1 0 ...
Page 3: ......
Page 18: ...3 H W Circuit Description 17 Figure 1 Receiver Part Block Diagram ...
Page 42: ...3 H W Circuit Description 41 A BaseBand Components Component Side ...
Page 102: ...5 DISASSEMBLY INSTRUCTION 101 5 DISASSEMBLY INSTRUCTION 2 1 1 2 ...
Page 103: ...5 DISASSEMBLY INSTRUCTION 102 1 2 3 ...
Page 104: ...5 DISASSEMBLY INSTRUCTION 103 2 1 1 2 ...
Page 105: ...5 DISASSEMBLY INSTRUCTION 104 3 ...
Page 106: ...5 DISASSEMBLY INSTRUCTION 105 ...
Page 113: ...7 BLOCK DIAGRAM 112 Baseband Part 7 BLOCK DIAGRAM The Block Diagram of the Baseband Part ...
Page 122: ... 121 9 PCB LAYOUT ...
Page 123: ... 122 9 PCB LAYOUT ...
Page 133: ......
Page 134: ... 133 11 EXPLODED VIEW REPLACEMENT PART LIST 11 1 EXPLODED VIEW ...
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