Sharp GX30 Service Manual - Page 67
Out of range and incoming/outgoing calls are impossible., Checkpoints in RF Test Tool]
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CONFIDENTIAL 11. Out of range and incoming/outgoing calls are impossible. [Checkpoints in RF Test Tool] Is transmission possible using RF Test Tool? YES [Sender] NO Is voltage (applox. 2.9 V) supplied to pin 6 of IC804? YES Is IQ signal supplied to pins 23, 24, 25, and 26 of IC801? YES Is frequency signal sent? GSM850/GSM900 bands ......... IC801 pin 17 DCS1800/PCS1900 bands ...... IC801 pin 19 YES Is frequency signal supplied? GSM850/GSM900 bands ........ FL803 pin 15 DCS1800/PCS1900 bands ..... FL803 pin 13 YES Is frequency signal supplied to pin 1 of FL905? YES Is frequency signal supplied to pin 1 of J801? YES J801 is defective. NO IC804 is defective. NO IC103, IC106, or PWB is defective. IC801 is defective. NO IC802 is defective. NO NO FL803 is defective. NO FL905 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 NO Is frequency signal supplied? GSM850 band FL904 pins 9, 10 GSM900 band FL904 pins 6, 7 DCS1800/PCS1900 bands ......... Go to the next step. NO Is frequency signal supplied? GSM850 band FL901 pin 1 GSM900 band FL902 pin 9 DCS1800 band FL902 pin 6 PCS1900 band FL903 pin 1 NO Is frequency signal supplied to pin 9 of FL803? NO FL905 or J801 is defective. IC801 is defective. YES FL904 is defective. YES FL901, FL902, or FL903 is defective. YES YES FL803 is defective. GX30 2 - 59
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