- 101 -
4.14 HFK Trouble
SETTING : After initializing GSM test equipment, Connect PIF to the phone, and power on.
START
Change HFK.
Voltage at R337 is 0V ?
Can you hear your
voice from the HFK?
Yes
No
No
Change the HFK and
try again.
Resolder R337 & CN302.
Yes
Set the audio part of the test
equipment to echo mode.
Connect HFK to the phone.
No
Does the
audio profile of the phone
change to the car-kit
mode?
Redownload software.
HFK will be work properly.
Set the audio part of the test
equipment to PRBS or
continuous wave mode.
HFK detect problem.
Audio path problem.
HFK receiving path
problem.
HFK sending path problem.
Yes
④
No
Yes
Can you hear your
voice from the HFK?
Yes
Yes
Yes
Can you hear your
voice from the HFK?
②
①
No
HFK receiving path problem.
Yes
Check the HFK again.
No
Resolder or replace U203 & U204.
Redownload software.
Yes
Change the main board.
①
Is the signal
level at pin 9 & 10 of
CN302 a few tens or
hundreds
mV(AC)?
③
Is the signal
level at pin 5 of U203 & U204
a few tens or hundreds
mV(AC)?
No
Yes
Does it work well?
Yes
No
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 ...