harman/kardon Service Bulletin
Service bulletin # H/K2000-04 Rev1 February 2003 Warranty labor rate:
AVR500 MAJOR repair
To: All harman/kardon Service Centers AVR7000 MINOR repair
Models: AVR500/AVR7000
Subject: Noise in Logic 7 Mode
In the event you receive an AVR500 or AVR7000 receiver with the complaint ?There is crackling, noise,
or distortion coming from my loudspeakers when my receiver is in the Logic 7 mode with certain
program material playing?, perform the following procedure:
AVR500 ONLY: REMOVAL AND MODIFICATION OF THE DSP BOARD (replace IC709 TRAD ROM-0001)
WARNING: FOLLOW PROPER STATIC CONTROL PROCEDURES and use caution during the removal of the
DSP board, and during installation of new IC709 to prevent damage.
1) Remove the top cover, (14) Black Phillips screws at the sides and rear of the unit.
2) Locate the DSP PC Board; Figure 1. Remove the two metal braces at the top of the unit. If necessary, cut
the cable ties attached to the braces to move any wires away from the area.
3) Pull the white 22 conductor ribbon cable at the rear of the DSP PC Board straight out of its receptacle.
4) Unplug the white 5 conductor molex cable at the top of the DSP PC Board.
5) Remove the (33) plated Phillips screws on the left side of the rear backplate; see Figure 2. Do not remove
any additional screws on the right side. If using a power tool, use care and minimum effort to avoid
damaging the various plastic receptacles.
6) Remove all three black plastic plugs that cover the optical inputs at the rear of the DSP PC Board.
7) Pull on the left side of the rear backplate, away from the receiver chassis; you should be able to pull it away
enough to allow the DSP PC Board to be pulled straight up and out of the receiver.
8) Unsolder IC709 TRAD ROM-0001 and replace with hk part# J21310030011. See illustration on following
page for location on PCB.
Model Serial Number Serial Number
STATUS ACTION
120V 230V RDS
TH0002-01000 TH0006-01000
AVR500 To To Noise in Logic 7 Mode Replace IC709
TH0002-14977 TH0006-05105 TRAD ROM-0001
TH0002-14978 or TH0006-05106 or
AVR500
higher higher Modified by factory NONE REQUIRED
19 |
ACEC
