DOWNLOAD Sharp XG-C455W (serv.man5) Service Manual ↓ Size: 411.7 KB | Pages: 7 in PDF or view online for FREE

XG-C455W/PG-C355W

5 – 5

                                          
Send component signal or RGB signal of 1080i (or 720P) from 
COMPUTER/COMPONENT Terminal.
Select COMPUTER1 or COMPUTER2 using keys on the main 
unit or the remote control.

YES

Is image displayed normally?

YES

End

                                          

NO

Are picture signals sent to TL2502, TL2507, and TL2508?

NO

Check IC2403 and the peripheral circuits.

YES

Is 3.3V applied to TL1723 and TL1734?

NO

Check IC1703, IC1713 and peripheral circuits.

YES

Is 2.5V applied to TL1733?

NO

Check IC1711 and peripheral circuits.

YES

Check IC2505 and peripheral circuits.

                                               
Send the DVI digital signal to the DVI Terminal.
Select “DVI-D Computer” using the keys on the main unit or the 
remote controller.

                                                
Does an image appear properly?

YES

End

 NO

Is the DVI signal supplied to R2549, R2550, R2552, R2553, 
R2555, R2556, R2557 and R2558?

NO

Check DVI Terminal, L2801, L2802, L2803, L2804, D2801, 
D2802 and peripheral circuits.

YES

Is 3.3V applied to TL1723 and TL1734?

NO

Check IC1703, IC1713 and peripheral circuits.

YES

Is 2.5V applied to TL1733?

NO

Check IC1711 and peripheral circuits.

YES

Check IC2505 and peripheral circuits.

XG-C455W/PG-C355W

5 – 6

Send S-Video signal (color signal) from S-Video Terminal. Select 
S-Video using keys on the main unit or the remote control.

   

 

Is image displayed normally?

YES

End

NO

Is image displayed in black and white?

YES

Check S-VIDEO terminal and peripheral circuits of Q2603 and 
SC2701.

NO

Is S-VIDEO signal (Y) sent to TL2606?

NO

Check S-VIDEO terminal and peripheral circuits of Q2601 and 
SC2701.

YES

Is 1.8 V applied to TL2613?

NO

Check IC2605 and peripheral circuits.

YES

Is 3.3 V applied to TL1723?

NO

Check IC1703 and peripheral circuits.

YES

Is 3.3 V applied to TL1734?

NO

Check IC1713 and peripheral circuits.

YES

Check IC2602 and peripheral circuits.

Send VIDEO signal from VIDEO Terminal. Use buttons on the 
main unit or the remote control to select VIDEO.

 

Is image displayed normally?

YES

End

NO

Is VIDEO signal sent to TL2605?

NO

Check VIDEO terminal and peripheral circuits of Q2602 and 
SC2701.

YES

Is 1.8 V applied to TL2613?

NO

Check IC2605 and peripheral circuits.

YES

Is 3.3 V applied to TL1723?

NO

Check IC1703 and peripheral circuits.

YES

Is 3.3 V applied to TL1734?

NO

Check IC1713 and peripheral circuits.

YES

Check IC2602 and peripheral circuits.

XG-C455W/PG-C355W

5 – 7

LAN communication is disabled even though 
connecting the control PC with a LAN cable. The 
LINK LED (green) does not light up.

 

Are the connection of connecting cable and the 
settings of IP address, sub-net address and 
default gateway correct?

NO

Check the connecting cable and LAN settings. If the LAN settings are       
unknown, contact the network administrator. 
If the network settings cannot be saved, replace IC6708 (EEP ROM) as it may 
be defective.

YES

Note: When IC6708 (EEP ROM) is replaced, the MAC address returns to 
default. Refer to "Resetting after replacing IC6708 (EEP ROM)" to reset.

Are the network device (e.g. Hub) between the 
control PC and XG-C455W and cable normal?

NO

Repair defective parts in the network.

YES

When data is sent from the control PC, do pins 
(30) and (31) of IC8201 (PHY receiver) receive 
signals?

NO

Check the peripheral circuit of J8201 (RJ-45 jack with built-in transformer).

YES

Check the PHY receiver IC8201 and the periph-
eral circuits of the microprocessor IC8001.

XG-C455W/PG-C355W

5 – 7

LAN communication is disabled even though 
connecting the control PC with a LAN cable. The 
LINK LED (green) does not light up.

 

Are the connection of connecting cable and the 
settings of IP address, sub-net address and 
default gateway correct?

NO

Check the connecting cable and LAN settings. If the LAN settings are       
unknown, contact the network administrator. 
If the network settings cannot be saved, replace IC6708 (EEP ROM) as it may 
be defective.

YES

Note: When IC6708 (EEP ROM) is replaced, the MAC address returns to 
default. Refer to "Resetting after replacing IC6708 (EEP ROM)" to reset.

Are the network device (e.g. Hub) between the 
control PC and XG-C455W and cable normal?

NO

Repair defective parts in the network.

YES

When data is sent from the control PC, do pins 
(30) and (31) of IC8201 (PHY receiver) receive 
signals?

NO

Check the peripheral circuit of J8201 (RJ-45 jack with built-in transformer).

YES

Check the PHY receiver IC8201 and the periph-
eral circuits of the microprocessor IC8001.