harman/kardon Service Bulletin
DVD31 Nov 04
Service bulletin # HK2004-003
To: Harman Kardon Service Centers
Models: DVD31/230
Subject: Circuit modification / can’t read disc.
In the event you receive any DVD31/230 for service, please check if the below modification is done; if not, please
do the following modification.
All units with the below mentioned serial number must have the modification applied, even in case the DVD player came in
for a different repair.
1. Remove the eight plated screws holding the top cover to the unit; remove the top cover
2. Locate Q109 and Q110 on the main board (see picture below)
3. Power on the unit, load a disc and press play
4. Measure Q110: if you do NOT measure 5V (4.9V) on Q110 collector (HFM), exchange Q109.
5. In any case, exchange Q110 to DTA114EKA
6. Remove R149
7. Power the unit on and test if there is 5V (4.9V) on Q110 collector (HFM) in play mode.
8. Test the unit for general functionality.
Q109, 8050 (Y1)……….. ……….. Part number: 121-00008050-T000
Q110, New DTA114EKA………… Part number: 121-DTA114EK-A400
Org circuit
New circuit after modification
DVD31 harman/kardon
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