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4.8 Speaker Trouble
SETTING : Connect PIF to the phone, and Power on. Enter The engineering mode, and set
“Melody on” at Buzzer of BB test menu.
The power to the analog
part of Melody IC
START
Voltage across C222
= 3.3 V?
Voltage at
R212 = 2.8 V ?
Replace U202
( Melody IC LDO)
Check the soldering condition of
R212, and re-solder R212
No
No
Yes
The power to the analog
part of Melody IC
Check the
soldering of C201, C205,
R203, R205
Re-soldering
C201, C205, R203, R205
No
Yes
The component of
Melody IC path
Yes
Check the signal level
at 1,2 of CN201
Re-solder CN201
or Replace CN201
No
Speaker connector
Check!!
Check the soldering
between Speaker & wire
No
Speaker connector
Check!!
Yes
Re-solder Speaker
Re-solder Speaker
Yes
Speaker
Working!!
Yes
4. TROUBLE SHOOTING
Содержание G3100
Страница 32: ... 34 3 TECHNICAL BRIEF Figure 3 20 TX IQ Signal Figure 3 21 RX IQ Signal ...
Страница 40: ... 42 Figure 3 26 1 Voice band circuit diagram Headset Hands free kit part 1 3 TECHNICAL BRIEF ...
Страница 42: ... 44 Figure 3 27 AD6521 circuit diagram 3 TECHNICAL BRIEF ...
Страница 73: ... 75 4 3 8 Receiver RF Level Figure 4 1 Test Points of Rx Level 4 TROUBLE SHOOTING ...
Страница 74: ... 76 4 3 9 Transmitter RF Level Figure 4 2 Test Points of Tx Level 4 TROUBLE SHOOTING ...
Страница 81: ... 83 The Receiver part Circuit Diagram C203 C207 C206 4 TROUBLE SHOOTING ...
Страница 87: ... 89 R202 MIC201 R204 C204 C201 R208 R206 C208 Q203 4 TROUBLE SHOOTING ...
Страница 93: ... 95 Test SIM Connector Check J301 4 TROUBLE SHOOTING ...
Страница 97: ... 99 J201 R240 C234 L201 R241 4 TROUBLE SHOOTING U205 U203 U204 ...
Страница 101: ... 103 CN302 U203 U204 4 TROUBLE SHOOTING ...
Страница 102: ... 104 U205 4 TROUBLE SHOOTING ...
Страница 104: ...5 DISASSEMBLY INSTRUCTION 106 3 Detach the rest components as shown below Figure 5 3 Detaching the rest components ...
Страница 108: ...3 Press Start and Wait until Erase is completed 110 1 Press Start 2 Confirm completion 6 SOFTWARE DOWNLOAD ...
Страница 117: ... 119 9 PCB LAYOUT 9 1 Rear Part ...
Страница 118: ...9 2 Front Part 120 ...
Страница 124: ... 126 11 2 Standalone Test Equipment Setup GSM Test Equipment Power Supply PC JIG RS 232 Cable Phone 11 STAN ALONE TEST ...
Страница 134: ... 137 13 EXPLODED VIEW REPLACEMENT PART LIST 13 1 Exploded View ...