Sharp XV-DW100U Service Manual download pdf (Page 39)

39

XV-DW100U

TROUBLE SHOOTING TABLE (Continued)

Yes

Checking the output PWB unit

Are there signal inputs at

SC1404, SC1405, SC1501 and

SC1502?

Are voltages applied to EA

connectors and SC8404,

SC8405 and SC8502?

Yes

No

NoNo

Check IC2101, IC2202,

IC2302 and their peripheral

circuits.

Are there signal outputs at

pins (17) of IC2102, IC2202,

IC2302?

Yes

No

Are there signal inputs at pin

(47) of IC1101, IC1102,

IC1201, IC1202, IC1301 and

IC1302?

Yes

No

Check IC1101,IC1201,IC1301

and their peripheral circuits.

Are there signal outputs at pins

(17), (19), (21), (27), (29) and

(31) of IC1101, IC1102,

IC1201, IC1202, IC1301 and

IC1302?

Yes

Yes

No

If there is no signal input at

pins (15) and (30) of

SC1101, SC1102 and

SC1103, check IC1603,

IC1601 and their

peripheral circuits.

No

If there is no signal input at

pins (1) and (31) of SC1101,

SC1102 and SC1103, check

the switching circuit and

amplifier circuit of IC1101,

IC1201, IC1301, IC1102,

IC1202, IC1302 and their

peripheral circuits.

Are there signal inputs at

SC1101, SC1201 and

SC1301?

Check IC1611, IC1612,

IC1613, IC1615 and their

peripheral circuits.

Check the R, G and B panels.

If there is no signal at EA

connector or SC8404, SC8405

and SC8502, go to Checking

the power unitblock.

If there is no signal at SC8404

and SC8405, go to "Trouble

shooting table for PC I/F unit".

If there is no signal at P801

and P802, go to the video

system block.

Check IC2102, IC2202,

IC2302 and their peripheral

circuits.

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