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GX15
15. Bluetooth communication is impossible.
A connection cannot be established via Bluetooth.
Is 3 V supplied from IC403 pin 3?
Is IC402 pin 34 (RESET signal) always at "H"?
Are pulse signals sent to IC402 pin 74 (BT_TXD signal)?
IC106 is defective.
Phone can be connected to Bluetooth headset, but sound is
not heard.
Is waveform of PCMCLK signal (approx. 256 kHz clock) sent
from R188?
Are pulse signals sent to BT_PCMOUT signal side of R199?
IC106 or IC402 is defective.
16. USB connection is impossible.
Connect a properly working phone to the PC/USB cable that is
not recognised. Is it recognised?
Connect to a PC with the USB cable.
Is 5 V or more applied to TP515?
Is Q503 pin 3 at "L"?
Is 3 V or more applied to TP507?
Is 3 V or more applied to TP523?
IC106 is defective.
CONFIDENTIAL
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
NO
IC403 or C402, C409 is defective.
NO
Parts (between IC106 pin 100 and IC401 pin 34) are defec-
tive.
NO
IC402 is defective.
IC106 is defective.
NO
NO
IC402 is defective.
Reinstall the driver and replace the USB cable to connect the
NO
phone.
NO
CN502 is connected improperly.
NO
Q503 is defective.
NO
IC501 or IC106 is defective.
NO
Q504, Q506, and R512 are defective.
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