Read Harman Kardon AVR 255 (serv.man5) Technical Bulletin online
harman/kardon
Service Bulletin
AVR254 AVR255 AVR354 and AVR355
31.07.2008
Premium Solutions for Audio and Infotainment
Service bulletin # HK2008-002
To:
All harman/kardon Service Centers
Models:
AVR254, AVR255, AVR354 and AVR355
Subject: Fan
Noise
In the event you receive one of the above-mentioned AVR models with the complaint “FAN NOISE”, carry
out the following modification.
Parts: 220uF 16V 105C Electrolytic Cap (EC).
out the following modification.
Parts: 220uF 16V 105C Electrolytic Cap (EC).
Picture 1
Picture 1a
1. Remove the top cover (13 screws)
2. Locate the FAN near the power supply (picture 1)
3. Remove FAN by removing the two screws for the FAN
2. Locate the FAN near the power supply (picture 1)
3. Remove FAN by removing the two screws for the FAN
bracket (See picture 1a) (not needed to remove the screw
on the bridge diode mounted on the FAN bracket)
on the bridge diode mounted on the FAN bracket)
Picture 2
4. Place the FAN on top of the power supply (picture 2)
5. Detach and lift the part of the label where it covers the solder
Picture 3
joints on the FAN (See Picture 3)
6. Mount the 220uF 16V EC on the solder joint and make
sure the minus of the EC is soldered on the joint were
the black wire is mounted.
the black wire is mounted.
7. Place the label on the FAN again.
8. Glue the EC on the FAN as showed on picture 3
9. Remount the FAN with the two screws.
8. Glue the EC on the FAN as showed on picture 3
9. Remount the FAN with the two screws.
Picture 3
10. Remount the top-cover
11. Confirm the unit can Power ON.
11. Confirm the unit can Power ON.
harman/kardon
Service Bulletin
AVR254 AVR255 AVR354 and AVR355
31.07.2008
Premium Solutions for Audio and Infotainment
Model
Serial number
Status
Action
AVR 254/120
AN0084-01000 to 13600
noticeable fan noise under
a specific temperature
a specific temperature
Add 220uF/16V EC to fan
VCC
VCC
AVR 254/120
AN0084-13601 and up
Modified By Factory
NONE REQUIRED
AVR 255/230
AN0085-01000 to 07901
noticeable fan noise under
a specific temperature
a specific temperature
Add 220uF/16V EC to fan
VCC
VCC
AVR 255/230
AN0085-07901 and up
Modified By Factory
NONE REQUIRED
AVR 354/120
AN0086-0100 to 06801
noticeable fan noise under
a specific temperature
a specific temperature
Add 220uF/16V EC to fan
VCC
VCC
AVR 354/120
AN0086-06801 and up
Modified By Factory
NONE REQUIRED
AVR 355/230
AN0088-01000 to 04401
noticeable fan noise under
a specific temperature
a specific temperature
Add 220uF/16V EC to fan
VCC
VCC
AVR 355/230
AN0088-04401 and up
Modified By Factory
NONE REQUIRED
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