The circuit around CY920 is faulty.
YES
Can the output voltage (1.8
V) to IC114 (DC-DC Conv.) be
confirmed?
Can the output voltage (1.8 V)
to Q1102 (FET-SW) be con-
firmed?
Can the output voltage (2.5
V) to IC116 (DC-DC Conv.) be
confirmed?
Are the versions of the Ethernet SBL and IMG
displayed in Version Check Mode?
Is D5V_POWER (IC151 uCOM
136 pin) "Hi" ?
Is E_POWER3 (IC151 uCOM
134 pin) "Hi" ?
Is E_POWER2 (IC151 uCOM
133 pin) "Hi" ?
The circuit of E_POWER2
between IC151 and IC114 are
faulty.
The circuit of E_POWER3 be-
tween IC151 and Q1102 are
faulty.
The circuit of E_POWER2
between IC151 and IC116 are
faulty.
The circuit around IC114 (DC-
DC.Conv.) is faulty.
The circuit around Q1102
(FET-SW) is faulty.
The circuit around IC116 (DC-
DC.Conv.) is faulty.
The Ethernet software is faulty.
YES
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
NO
YES
YES
YES
In the same way as for Network connection troubleshooting, check the CY920 power supply and Eth-
ernet SBL, and that the IMG version is displayed correctly.
Is the antenna cable inserted correctly into
CY920?
Is the Bluetooth device compatible with the
A2DP profile?
Is the Bluetooth function enabled on the Blue-
tooth device?
Connect the antenna cable correctly.
Use a device that is A2DP profile compatible.
Enable the Bluetooth function and try connect-
ing again.
5.2. Cannot establish a Bluetooth connection
Checking the unit
Check the Bluetooth device being used
NO
NO
NO
94
Caution in
servicing
Electrical
Mechanical
Repair Information
Updating