DAEWOO DHCX250
Service Manual

5. Trouble Shooting Guide
-. Audio Part DHC-X200/X250

SOUND Abnormal

OPEN/CLOSE Abnormal

Check if the RY801 is OK.

No

Check if the FRONT CONTROL is OK.

No

Yes

Refer to F_RLY_CONTROL. Yes

Check if the PN402 is OK.

No

Refer to FRONT PCB. Check if the IC801 PIN(2)(4) waveform is OK. Yes No

Check if the IC801 PIN(1)(3) is OK. Yes Yes

No

Check if the CN706 is OK.

No

Check PN101E if is normally. No

Yes OK Check DSP PCB. Refer to POWER SUPPLY circuit. Yes

Check POWER SUPPLY circuit. Check if the ATAPI Cable if is normally.

Reconnect it.

No

Reconnect it. Yes

VIDEO OUT Abnormal

Check PN303 if is normally.

No

Reconnect it. Check if the VIDEO JACK is OK. Yes No

Refer to VIDEO JACK. Yes

Check if the PN303 PIN(3)(5) level is OK.

No

Check if the IC451 is OK.

No

Check if the PN303 PINS(1)(2) level is OK.(0V,5V)

No

Check if the IC451 PIN(7) is OK.

No

Yes

Yes

Replace DECK MECHA DVD. Refer to POWER SUPPLY circuit. Check if the IC102 PIN(14)(180) is OK.(MT1388)

Yes Yes Check if the IC451 PIN(2)(3) is OK.

No

No

Check if the PN101A PIN(3) to (18) waveform is OK.

No

Yes

Yes

Yes

Refer to DRIVER circuit of TROPEN and PWMOUT1.

Check MPEG PCB.

OK

Check FRONT PCB.

Replace DECK MECHA DVD.

Replace MPEG PCB.

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