GX15
2 – 58
CONFIDENTIAL
15. Bluetooth communication is impossible.
16. USB connection is impossible.
A connection cannot be established via Bluetooth.
Is 3 V supplied from IC403 pin 3?
IC403 or C402, C409 is defective.
Is IC402 pin 34 (RESET signal) always at “H”?
Parts (between IC106 pin 100 and IC401 pin 34) are defec-
tive.
Are pulse signals sent to IC402 pin 74 (BT_TXD signal)?
IC402 is defective.
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?
IC106 is defective.
Are pulse signals sent to BT_PCMOUT signal side of R199?
IC402 is defective.
IC106 or IC402 is defective.
Connect a properly working phone to the PC/USB cable that is
not recognised. Is it recognised?
Reinstall the driver and replace the USB cable to connect the
phone.
Connect to a PC with the USB cable.
Is 5 V or more applied to TP515?
CN502 is connected improperly.
Is Q503 pin 3 at “L”?
Q503 is defective.
Is 3 V or more applied to TP507?
IC501 or IC106 is defective.
Is 3 V or more applied to TP523?
Q504, Q506, and R512 are defective.
IC106 is defective.
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
Summary of Contents for GX15
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