Marantz SR7009/U1B Service Manual page 115

5.2.1. Cannot connect to the Bluetooth (Case of CX870 model)
d
Is the Bluetooth device compatible with the A2DP profile?
d
Is the Bluetooth function enabled on the Bluetooth device?
d
Is CN916 on the CX870 Module PCB connected correctly to BN921 on
the Bluetooth PCB?
Can a voltage (5V) be confirmed between pin 1 and pin 4 of CN904
on DIGITAL PCB?
Can a voltage (5V) be confirmed pin 10 of CN916 on Bluetooth PCB?
Can a voltage (3.3V) be confirmed pin 6 of CN916 on Bluetooth PCB?
Can a voltage (3.6V) be confirmed pin 1 of IC923 on Bluetooth PCB?
Can a waveform (32.768kHz) be confirmed pin 4 of IC922 on Blue-
tooth PCB?
Is 1pin(LDO_ON) of Bluetooth PCB CN916 "Hi"?
The circuit around Bluetooth Module (iBT-06-02S) or CX870 is faulty.
Check the Bluetooth
YES
YES
Checking the unit
YES
YES
YES
YES
YES
YES
YES
d
NO
Use a device that is A2DP profile compatible.
d
NO
Enable the Bluetooth function and try connecting
again.
d
NO
Connect the connector correctly.
NO
The circuit between the AC inlet and CN904 is faulty.
Check the SMPS PCB.
The circuit between CN904 of the DIGITAL PCB and
NO
CN916 of the Bluetooth PCB are faulty of wire or
PCB.
The circuit around Q1107 or IC112 of the DIGITAL
NO
PCB is faulty.
NO
The circuit around IC923 is faulty.
NO
The oscillation circuit including IC922 is faulty.
The circuit between CX870 and CN916 of the LDO_
NO
ON are faulty.
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d
d