Service Manuals, User Guides, Schematic Diagrams or docs for : ONKYO DVD DPC-6 dpc6update_472

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dpc6update_472


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                                                                         Final release date:02/27/01

DPC-6, DPC-6.1                                                                      Ref: 112200-2

Service Tip and Troubleshooting:

Make sure static free work environment is observed at all times when working with Laser Pickup.

Symptoms:              (1) Disk Starts, Spins and DISK ERROR comes up.
                       (2) Disk plays with intermittent picture breaking up.
                       (3) Disk fails to initialize, or locks up trying to read disk.
                       (4) Plays DVD but fails to play CD or plays CD but not DVD.

Solution:              Replace pickup connector cable. "Initial Change Over". See page 3 and 4 on how to test.

           Old Part number                       New part Number                         Reason For change
                      2042183512                            2042184012                             Serviceability
                      2042180512                              Eliminated                               Simplicity
                      1H412554-2                              Eliminated                               Simplicity

Before you start work the following process must be addressed in order to avoid damage to the pickup assembly.
Your finding may resemble the followings:
    a. Powers, rotates, carousel, chucks, (clamps) and LD is not ON, and immediately un-chuck.
    b. Powers, chucks, and LD is on spins for a few seconds and unclamps goes to next disk.
    c. Powers, chucks, LD is on, spins and spins trying to read TOC. Endless loop.
    d. DVD plays but CD plays but not DVD.
    e. Picture breakup problem.

 Fig1                                             Fig2                                      Fig3
             Access hole for shorting                                                                    Short J019 with
             pickup at the bottom.




                                                         Lift cap with a screwdriver.
        Must return cap when done.




                           Remove top cover     Disconnect al wires
 Fig4                                           from digital PCB.

                                                                                            Fig5




                                                                                                       Remove front panel screws
                                                                                                                        Fig8
 Fig6                                           Fig7                  Latch




                                                                                                         Carousel removed
                                                Pull carousel forward with latch
 Front and rear panel removed                            pushed down.


 You may disconnect cable from
            P111B
                                                Fig10                                      Fig11




              Remove two PCB mounting screws                                                              Bend the new cable
 Fig9          and short pickup LD terminals.                                                       PN#2042184012 at the point of red
                                                                                                      marking towards the marking.
                                                  The bend seen in Fig11 shall match this corner
                                                  (white mark). Return the clear vinyl as it was.
                                                       Use double side tape to attach cable.
            Fig12                                                                                       Re-assemble the unit back
                                                                                                        and attach the cable as
                                                                                                        illustrated next Fig14. It is
                                                                                                        important to keep the pickup
                                                                                                        shorted until last.
           Connect cable PN#2042184012
          directly to the pick-up. Please pay               Fig13
            attention to the BLUE BACK.



                                    Make sure the cable at
 Fig14                          connector CN501 is curled to a
                                minimum to avoid cable break.                                       Set the unit on its side and de-solder the
                                                                                                    shorting from the pick up very carefully.

                                                   Core PN#230957 must be                  Fig15
                                                   installed at this point using
                                                        double side tape.

                                                Bend cable as you see on this
                                                picture. Please do not crush cable.




Solution:            Replace pickup connector cable. "Second time around".

 Fig16
                                                       If the shorting PCB seen in Fig 3 is not in place, you
                                                       will need to keep the DSP still connected to CN501
                                                       connector until pick-up shorting is done as seen on
                                                       figure 10. Keep DSP attached to the frame with an
                                                       electrical tape.
Test points and references:

A: make sure static free work environment is observed at all times when working with Laser Pickup.

With the unit totally turned OFF, confirm the impedance of the Focus Coil and the tracking coil at CN501. Between
pin 10 and 13, 8.2ohm for Focus coil and across pin 11 and 12, 8.3ohm for the Tracking Coil.

Check and verify procedure as given on page 43,44 of service manual. For disk to be recognized while carousel is
rotating but fail to spin and focus is a result of missing LD ON. This happens when one of the connectors at any of
the three points (Fig1 A, B and or Fig2 C) is lacking good contact to the ribbon.

***The laser pick needs no adjustment!!! ***
Do not forget to open pick-up shorting wire seen in Fig1 #1.
The troubleshooting guide given between pages of 43 and 50 is extremely helpful to determine the condition of the
PICKUP.

B: Disregarded Step 3 of page 45 and make correction as follows.
                                            The reference should be:
                                           lop = Voltage between
                                                 E522 and E523 3.3ohm
The voltage drop across R505 (3.3ohm) resistor is higher than 218~238mvDC in normal operating condition and the
LD is not on, connection (Fig1 A, B and or Fig2 C) may be loose or poor. This indicates the LD is not present as
load to the voltage rail R505.

The Individual optical output level may be monitored at the pickup connector point using an oscilloscope with no
more than 15pf input capacitance.

Example: Here are some common RF references taken using oscilloscope of 10meg/15pf with X10 probe.

WARNING: THESE TESTS (4,5,6,7,8,9) CAN NOT BE DONE UNLESS YOUR
OSCILOSCOPE PROBE HAS <10PF OF CAPACITANCE.
C: Connector CN501 starting from pin 4,5,6,7,8 and 9. may show the following reference signals while playing
DVD. For symptom (1), missing one of these signals could result Disk Reading message be displayed indefinitely
and lock the player in endless loop, or after numerous attempt Disk Error may be displayed.
                         87mv pp                         87mv pp                      160mv pp




                                                       110mv pp                       110mv pp
                         160mv pp
For location refer to manual Page 50.

   TP-515
                                        D: To help reduce the break up of the video signal, remount CORE
                                        #230957. The installation of this core should be as illustrated on Fig14.

                                        ** Since the root cause for the failure of DV-C600 and DV-C601 is
                                        mainly noisy pick-up signal do to poor connector terminals, it is very
                                        important all of the necessary steps mentioned are exhausted before
                                        attempting to replace the PICKUP.

                                        For additional info send technical question only to
                                        svceng@onkyousa.com



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