Service manual

GX30

2 – 59

CONFIDENTIAL

11. Out of range and incoming/outgoing calls are impossible.

[Checkpoints in RF Test Tool]

Is transmission possible using RF Test Tool?

Is voltage (applox. 2.9 V) supplied to pin 6 of IC804? IC804 is defective.

Is IQ signal supplied to pins 23, 24, 25, and 26 of IC801? IC103, IC106, or PWB is defective.

Is frequency signal sent?

GSM850/GSM900 bands ......... IC801 pin 17

DCS1800/PCS1900 bands ...... IC801 pin 19

IC801 is defective.

Is frequency signal supplied?

GSM850/GSM900 bands ........ FL803 pin 15

DCS1800/PCS1900 bands ..... FL803 pin 13

IC802 is defective.

Is frequency signal supplied to pin 1 of FL905? FL803 is defective.

Is frequency signal supplied to pin 1 of J801? FL905 is defective.

J801 is defective.

[Receiver]

–70 dBm input.

Is frequency signal supplied?

GSM850/GSM900 bands ............. IC801 pins 9, 10

DCS1800 band ............................ IC801 pins 6, 7

PCS1900 band ............................ IC801 pins 3, 4

IC801 is defective.

Is frequency signal supplied?

GSM850 band ..............................FL904 pins 9, 10

GSM900 band...............................FL904 pins 6, 7

DCS1800/PCS1900 bands ......... Go to the next step.

FL904 is defective.

Is frequency signal supplied?

GSM850 band ................................ FL901 pin 1

GSM900 band ................................ FL902 pin 9

DCS1800 band ............................... FL902 pin 6

PCS1900 band ............................... FL903 pin 1

FL901, FL902, or FL903 is defective.

Is frequency signal supplied to pin 9 of FL803? FL803 is defective.

FL905 or J801 is defective.

YES

[Sender]

YES