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KENWOOD DPC781
Service Manual


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  • Contains Circuit Diagrams
  • Download
  • PDF Format
  • Complete manual
  • Language: English
Price: $4.99

Description of KENWOOD DPC781 Service Manual

Complete service manual in digital format (PDF File). Service manuals usually contains circuit diagrams, printed circuit boards, repair tips, wiring diagrams, block diagrams and parts list. Service Manual ( sometimes called Repair Manual ) is used mainly by technicians.

If You just want to know how to use Your tv, video, mp3 player etc. You should look for Owner's Manual. After placing order we'll send You download instructions on Your email address.

The manual is available in languages: English

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Text excerpt from page 4 (click to view)
DPC-781/782/981
ADJUSTMENT
No. ITEM INPUT SETTING OUTPUT SETTING PLAYER SETTING ALIGNMENT POINT ALIGN FOR On the power from 0.08 to 0.15 mW, when the diffraction grating is correctly aligned with the RF level of 1.0 Vp-p or more. FIG. Apply the sensor Short the test land. Confirm section of optical that the display is power meter on " ". the Press FF Key and confirm pickup lens. that the display is 03. Connect an oscilloscope as follows. CH1:RF (Check-land RF) CH2:T1 (Check-land TE1) Connect an oscilloscope as follows. CH1:RF (Check-land RF) CH2:T1 (Check-land TE1)

1

LASER POWER

–

–

–

2

FOCUS ERROR

Test disc KTD-03

Press the PLAY key . Confirm that the display is "05".

FE BALANCE VR3

Optimum eye pattern

–

3

TRACKING ERROR

Test disc KTD-03

Press the FF key. Confirm that the display is " ".

TE BALANCE VR5

Symmetry between upper and lower

–

4

FOCUS GAIN

Test disc KTD-03 Apply Connect a LPF signal of between Check1.0kHz, land F1 and F2 to 0.05Vrms which connect an between oscilloscope or AC Check-land F1 voltmeters. and F2.

Press the PLAY key . Confirm that the display is "05".

FOCUS GAIN VR4

Two VTVMs should read the same value.

(d)

5

Test disc KTD-03 Apply Connect a LPF signal of between CheckTRACKING 1.0kHz, land T1 and T2 to GAIN 0.05Vrms which connect an between oscilloscope or AC Check-land T1 voltmeters. and T2.

Press the PLAY key . Confirm that the display is "05".

TRACKING GAIN VR6

Two VTVMs should read the same value.

(e)

Note: Test DISC KTD-03, TCD-783 or equivalent LPF : Around 47kΩ + 390 pF or so. Step 1~5 are in Test Mode.

(d) Focus Gain Two VTVMs should read the same value.
AC voltmeter

(e) Tracking Gain Two VTVMs should read the same value.
AC voltmeter

F1 F2
1.0kHz 0.05Vrms

L.P.F

T1 T2

L.P.F

VC

L.P.F

1.0kHz 0.05Vrms

VC

L.P.F

4

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