Harman Kardon FESTIVAL 300 (serv.man3) Service Manual / Technical Bulletin ▷ View online
harman/kardon Incorporated 250 Crossways Park Drive, Woodbury New York 11797 (516) 496-3400
harman/kardon
Service Bulletin
Service bulletin # H/K9802 April 1998
Warranty labor rate: MINOR repair
To:
All harman/kardon Service Centers
Models: Festival 300/500
Subject:
Low Level Buzzing Sound from Loudspeakers
In the event you receive a Festival 300 or 500 with the complaint “Low level buzzing sound from
loudspeakers in all modes regardless of volume control position”, perform the following modification:
loudspeakers in all modes regardless of volume control position”, perform the following modification:
Procedure:
1. Remove (5) top cover screws; there are (3) at the rear and (2) at bottom front of the unit.
2. Remove (4) back panel screws; there are (2) on the back and (2) on the bottom.
3. Remove (3) screws from main PCB (Tuner), then squeeze the locktab (by standby transformer) to remove
main PCB.
4. Disconnect connectors WA6,WA3,WA2,WA4, WA1,and CN-1 to facilitate turning the board over.
5. Unsolder C10, 330ufd/16v electrolytic capacitor located between the relay and IC3. See location drawings.*
6. Replace C10 with a 330ufd/25v unit (h/k part #P5154-ND). Observe polarity. (Important: Use factory
5. Unsolder C10, 330ufd/16v electrolytic capacitor located between the relay and IC3. See location drawings.*
6. Replace C10 with a 330ufd/25v unit (h/k part #P5154-ND). Observe polarity. (Important: Use factory
replacement; if substitute is used it must be the same value, voltage rating, temperature rating, and
dimensions. Space is limited; position capacitor to avoid direct contact with IC3 regulator).
dimensions. Space is limited; position capacitor to avoid direct contact with IC3 regulator).
7. Reconnect connectors and reassemble unit in reverse order from steps 1 - 3.
8. Turn on unit and listen to assure buzz is absent in all modes.
8. Turn on unit and listen to assure buzz is absent in all modes.
* (Although the schematic diagram should not have to be consulted during the replacement, it should be noted that this
component (C10) is misprinted as C13 on the service manual schematic.)
Model
Serial number
120V
Status
Action
Festival 300
Festival 500
All serial numbers
affected
Buzzing sound
Replace
C10
with
330ufd/25v cap.
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