GTC
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Service Manual
a.
When AC charger (USB interface) is plugged, the F2 (VCHG_IN) and R120 (AC_USB_IN)
shall have 5V voltage.
b.
A real battery needs to be connected
. NTC in pin#3 of battery shall be 10K connected to
pin#1 of C155 (BAT_TS#).
c.
Pin#2 of R149 shall be high (4.5V ~ 5V).
d.
R140 (GP36_PSEL) shall be high (3.3V).
e.
During charging, pin#2 of R139 (GP35_CHARGING_ST1) shall be low (0V) and pin#2 of
R138 (GP86_CHARGING_ST2) shall be high (1.8V).
f.
After charging is finished, pin#2 of R139 (GP35_CHARGING_ST1) shall be high (3.3V) and
pin#2 of R138 (GP86_CHARGING_ST2) shall be low (0V).
g.
R23 and R61 (HDQ) shall have correct signals with (high –> 2.8V and low –> 0V).
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 ...
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Page 56: ...GTC Service Manual 8820 If PCS band measurement choose GSM PCS1900 ...
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Page 72: ...GTC Service Manual 8960 Rx test setup ...
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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 ...