4-3-5 Checking RF TX Level
- 71 -
Soldering check
R406, R408, R409,
(For GSM)
R414, R415, R416
(For DCS)
GSM: ~2V
DCS : ~2V
Yes
Change the board
No
Check R401
To Check TXRAMP
GSM: ~2.85V
DCS : ~2.85V
No
GSM: ~10dBm
DCS : ~8dBm
Check L401(For GSM),
L402(For DCS)
To Check TXVCO
Output
Yes
Changing U401
No
GSM: ~8dBm
DCS : ~6dBm
Check R406(For GSM),
R414(For DCS)
To Check Attenuation
Circuit
Yes
No
GSM: ~34dBm
DCS : ~32dBm
No
Check L405(For GSM),
C427(For DCS)To Check
PAM Output Power
RF TX Level before ANT SW
is OK
See next Page to check
ANT SW & Mobile SW
Yes
Check R403 to
Check 2.85v
Yes
Check R404
To Check TXPA
Changing U402
For these RF TX Level test case,
TX Stand alone Mode is needed
Change the board
GSM: ~2.7V
DCS : ~2.7V
Yes
No
Change the board
GSM: ~0V
DCS : ~2.7V
No
Change the board
Yes
Check R405
To Check Band
L405
L402
R401
L401
R414
C427
U401
R405
R404
U402
R406
R403
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 ...