GTC
■
Service Manual
Tx trace of the front end module
:
Do this process with a PCB and Pegasus repair tool
Repair
tool setting
:
The setup of the Pegasus repair tool is as the above plots showing. There are only two
major traces for the GSM and Edge functions. One is for 850/EGSM bands and the other is
for DCS/PCS bands. Therefore, to check if these two traces work correctly, only the EGSM
band and PCS band functions should be examined by the following steps. As for the setup
for the EGSM band is : Channel : 975
;
DAC : 760. The setup for the PCS band is
:
Channel :
512
;
DAC : 760
。
The setups of 8960 and 8820 are listed as the following pictures showing.
Band select
The red light would be lightened if
the connection between the PC and
the PCB is ok
Tx repair tool setup
Comport select
Summary of Contents for P526
Page 1: ...GTC Service Manual P526 Repair Lv3 4 SOP Version 1 1 2008 1 10 ...
Page 5: ...GTC Service Manual ...
Page 6: ...GTC Service Manual 3 Introduction 3 1 Block diagram ...
Page 7: ...GTC Service Manual 3 2 Main components and placement Top Side Bottom Side ...
Page 28: ...GTC Service Manual ...
Page 32: ...GTC Service Manual 5 8 LCD Needed Equipments A Power supply set to 4V 2A B Oscilloscope ...
Page 43: ...GTC Service Manual PA GSM and Edge Power Amplifier part ...
Page 44: ...GTC Service Manual Transceiver part E syren signal from base band ...
Page 46: ...GTC Service Manual Front End RF switch GSM antenna Pad ...
Page 47: ...GTC Service Manual PA Component displacement plot 1 ...
Page 51: ...GTC Service Manual 8960 Select the item ...
Page 52: ...GTC Service Manual EGSM band select If the PCS band measurement choose the PCS band ...
Page 54: ...GTC Service Manual ...
Page 55: ...GTC Service Manual ...
Page 56: ...GTC Service Manual 8820 If PCS band measurement choose GSM PCS1900 ...
Page 59: ...GTC Service Manual ...
Page 60: ...GTC Service Manual ...
Page 62: ...GTC Service Manual ...
Page 63: ...GTC Service Manual ...
Page 72: ...GTC Service Manual 8960 Rx test setup ...
Page 75: ...GTC Service Manual ...
Page 76: ...GTC Service Manual ...
Page 86: ...GTC Service Manual 14 Test points 14 1GPS Active Path ...
Page 87: ...GTC Service Manual 14 2 Passive Path ...
Page 88: ...GTC Service Manual 14 3 SiRF StarIII 4 Power part test points ...
Page 89: ...GTC Service Manual 14 4 GPS Power part Testing signal from baseband ...
Page 90: ...GTC Service Manual 15 Component displacement GPS Antenna Testing signal from baseband ...
Page 91: ...GTC Service Manual GPS Function Block ...
Page 93: ...GTC Service Manual GPS Function Block Test point displacement plot 3 ...
Page 98: ...GTC Service Manual 18 Measurement results of all test points Test point T305 Test point T306 ...
Page 99: ...GTC Service Manual Test point C401 Test point C406 ...
Page 101: ...GTC Service Manual 21 2 Components placement Figure of P526 board ...
Page 104: ...GTC Service Manual 4 Now the device is under BT test mode Step 4 3 Measured Graph ...
Page 105: ...GTC Service Manual 4 RF Board level examination procedure Flow Chart ...
Page 107: ...GTC Service Manual 1 choose OK 1 choose Connect 1 choose Done 4800 or 57600 ...
Page 108: ...GTC Service Manual SiRFDemoPPC plantface 1 choose Signal GPS signal receiving ...
Page 110: ...GTC Service Manual ...
Page 111: ...GTC Service Manual Appendix B GPS firmware download 1 choose Pegasus_DGPS exe 1 choose Browse ...
Page 113: ...GTC Service Manual The re download is finished Mobile re boot A ...