Denon AVR-X1100W Service Manual page 82

5.2. Cannot connect to the Bluetooth
Can a voltage (5V) be confirmed between pin 1 and pin 4 of CN471
on DIGITAL PCB?
Can a voltage (3.6V) be confirmed to BN921 on Bluetooth PCB?
Can a voltage (3.3V) be confirmed to pin 4 of BN921 on Bluetooth
PCB?
Can a voltage (3.6V) be confirmed to pin 10 of BN921 on Bluetooth
PCB?
Can a waveform (32.768kHz) be confirmed to pin 4 of IC922 on
Bluetooth PCB?
Is 4pin(LDO_ON) of Bluetooth PCB BN921 "Hi"?
The circuit around Bluetooth Module (iBT-06-02S) or CX870 is faulty.
Bluetooth Test Points
IC921
LDO_ON
3.3V
C9203
C9204
3.6V
C9202
L9202
(A SIDE)
YES
YES
YES
YES
YES
YES
X9201
C9205
Pb Pb Pb
(B SIDE)
NO
The circuit between the AC inlet and BN601 is faulty.
Check the SMPS PCB.
The circuit between CN741 of the DIGITAL PCB and
NO
BN921 of the Bluetooth PCB are faulty of wire or
board.
NO The circuit around Q7404 or IC741 of the DIGITAL
PCB is faulty.
The circuit around IC912 of the ADAPTER PCB is
NO
faulty.
NO
The oscillation circuit including IC922 is faulty.
The circuit between CX870 and BN921 of the LDO_
NO
ON are faulty.
32.768KHz
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