Denon AVR-X7200W Service Manual page 111

5.2.1. Cannot connect to the Bluetooth (Case of AVR-X7200W model)
Can a voltage (5V) be confirmed between pin 1 and pin 4 of N903 on
DIGITAL PCB?
Can a voltage (5V) be confirmed pin 10 of N901 on Bluetooth PCB?
Can a voltage (3.3V) be confirmed pin 6 of N901 on Bluetooth PCB?
Can a voltage (3.6V) be confirmed pin 1 of U1 on Bluetooth PCB?
Can a waveform (32.768kHz) be confirmed pin 4 of U2 on Bluetooth
PCB?
Is 4pin (LDO_ON) of Bluetooth PCB N901 "Hi"?
The circuit around Bluetooth Module (iBT-06-02S) or CX870 is faulty.
YES
YES
YES
YES
YES
YES
NO
The circuit between the AC inlet and N903 is faulty.
Check the SMPS PCB.
The circuit between N903 of the DIGITAL PCB and
NO
N1 of the Bluetooth PCB are faulty of wire or board.
The circuit around U1901 of the DIGITAL PCB is
NO
faulty.
NO
The circuit around U1 is faulty.
NO
The oscillation circuit including U2 is faulty.
The circuit between CX870 and N901 of the LDO_
NO
ON are faulty.
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