Check the USB device being used
YES
Is the USB device supported by this unit?
Is a USB hub being used?
This unit supports devices in the FAT16- and
FAT32-formatted mass storage class, MTP-
compatible devices and iPod devices (except for
some models).
Do not use a USB hub.
NO
Checking the unit
YES
YES
Can a voltage (5V) be conrmed between pin 1
and pin 4 of N5559 (USB Connector) on FRONT
HDMI/USB PCB?
The USB signal circuit between Network Module and N5559 of the FRONT HDMI/USB PCB are faulty.
Are N8001 of the DIGITAL PCB and N5560 of the
FRONT HDMI/USB PCB correctly connected?
The circuit around U8002 of the DIGITAL PCB is
faulty.
Connect the connectors correctly.
5.3. Cannot recognize the connected USB device
YES
NO
NO
NO
Checking the unit (If no picture is output)
YES
• Check the VIDEO circuit.
Are digital video signals(NETGUI_PCK, HS, VS, DE,
B0 - B7, R0 - R7, G0 - G7) output from Network
Module to U3200 (V.PLD)?
Checking the unit:(If no sound is output)
YES
YES
Check the U101(DSP) AUDIO circuit and the circuits thereafter.
Are the I2S signal output to pins 7, 11, 13 and 14
of the N8004 DIGITAL PCB ?
Are audio signal output to U101(DSP1) 100 pin
(Test Point : DSP/INF/FL(TPX250)) on DIGITAL
PCB.
5.4. No picture or sound is output
The circuit around Network Module, U3200
(V.PLD) is faulty.
Network Module is faulty.
The circuit around U9103 (A.PLD) is faulty.
NO
NO
NO
87
Caution in
servicing
Electrical Mechanical Repair Information Updating