Check the USB device being used
Is the USB device supported by this unit?
Is a USB hub being used?
Supports mass storage class and MTP-compatible
devices formatted to FAT16, FAT32 or NTFS.
Do not use a USB hub.
Checking the unit
Can a voltage (5V) be confirmed between [JK4400
: 1 - 4pin] (USB Connector) on FRONT PCB?
The USB signal circuit between Network Module and [JK4400] of the FRONT PCB are faulty.
Are [N1008] of the DIGITAL PCB and [CN4402] of
the FRONT PCB correctly connected?
The circuit around [U1010] of the DIGITAL PCB is
faulty.
Connect the connectors correctly.
5.3. Cannot recognize the connected USB device
Checking the unit (If no picture is output)
• Check the VIDEO circuit.
Are digital video signals(LEGOPCK, LEGOVS,
LEGOHS, LEGODE, LEGOVD0-LEGOVD23) output
from Network Module to [U1056 : V.PLD]?
Checking the unit:(If no sound is output)
Check the [U1073 : DSP] AUDIO circuit and the circuits thereafter.
Are the I2S signal output to [U1008 : 7, 11, 13,
14pin] of the DIGITAL PCB ?
Are audio signal output to Test point DSP1INF/FL
on DIGITAL PCB.
5.4. No picture or sound is output
The circuit around Network Module, [U1056 :
V.PLD] is faulty.
Network Module is faulty.
The circuit around [U1041 : A.PLD] is faulty.
NO
NO
NO
YES
YES
YES
NO
YES
YES
YES
YES
NO
NO
NO
Before Servicing
This Unit
Electrical
Mechanical
Repair Information
Updating
87
