Bulletin Hk2001-06 - Harman Kardon CDR20 Service Manual

CDR20
harman/kardon
Service bulletin # H/K2001-06 November 2001
To: All harman/kardon Service Centers
Model: CDR20
Subject: Noise when dubbing at x4 speed
In the event you receive a CDR20 CD Player/Recorder with the complaint: "There is noise being
generated on a recorded CDR at x4 speed", perform the modification below:
Synopsis: Change resistor R230 from 100 ohms to 22 ohms.
1) With the unit plugged in, turn it ON. Press the eject button on the Record side to open the drawer.
2) With the drawer fully extended, carefully lift up on the front trim to separate it, and off the main part of the
drawer. Press the eject buton again to close the drawer. Turn the unit OFF and unplug it.
3) Remove the (7) Phillips screws holding the top cover on; remove the top cover.
4) Unplug the three connectors at the rear of the Record PCB.
5) Unscrew the (4) black Phillips screws that are deep in the slotted wells in each corner of the Record
mechanism. Lift the entire Record assembly up and out of the unit.
6) Remove the gray metal shield from the assembly. Lay the assembly upside-down on a table, PCB facing
upwards.
7) Locate the area of concern with the aid of the illustrations. Change SMD resistor R230 from 100 ohms to
22 ohms, h/k part# 301-22.
8) Reassemble and replace the record mechanism in reverse order; test the unit by inserting a blank CDR disc and
making a recording at x4 speed to assure the noise problem is gone.
See Page 2 for serial numbers of Factory Modified Units
Service Bulletin
Warranty labor rate: MINOR repair
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harman/kardon