AVR 45 (serv.man4) - Harman Kardon Audio Technical Bulletin (repair manual)

avr 45 (serv.man4) technical bulletin
Model
AVR 45 (serv.man4)
Pages
2 Few pages! See other manuals at the bottom of the first or last page.
Size
515.83 KB
Type
PDF
Document
Technical Bulletin
Brand
Device
Audio
File
avr-45-sm4.pdf
Date

Read Harman Kardon AVR 45 (serv.man4) Technical Bulletin online

 
harman/kardon Incorporated  250 Crossways Park Drive, Woodbury  New York 11797  (516) 496-3400 
1
 
harman/kardon          
 
Service Bulletin
 
 
Service bulletin # H/K2000-01  March 2000   
 
 
Warranty labor rate: MINOR repair 
 
 To: 
    All harman/kardon Service Centers 
 
 Models: AVR35/AVR45/AVR65 
 
 Subject: No Output Using Digital Inputs 
 
 
In early versions of the AVR35, AVR45 and AVR65, the IC484 +5v regulator may overheat and go into thermal 
protection.  Its +5 volt output will cease; when this happens the AC-3 and Surround Processor cannot function 
normally when using the coaxial or optical digital inputs, and the audio output will go dead.  
 
In the event you receive an AVR35, AVR45 or AVR65 A/V receiver with the complaint “when using the 
digital inputs, either coaxial or optical, the unit’s output goes dead after several minutes and the words 
‘No Data’ appear in the display”, perform the following modification: 
 
1)  Remove the top cover, (14) Philips screws; set the unit on its side and remove the bottom cover, (8) Philips 
screws. 
2)  Locate R486, R495 (10 ohm 1 watt resistors) and IC484 (+5v regulator) on the MAIN PCB. See Figure 1.  
The parts are located near the front right corner of the MAIN PCB when viewed from the front.  IC484 is 
attached to a rectangular aluminum heatsink. 
3)  Desolder and remove R486, R495 and IC484.  The IC484’s heatsink has two additional soldered connections 
at the bottom of the MAIN PCB. See Figure 2. 
4)  Replace R486 and R495 with (2) 15 ohm 3 watt resistors, (h/k part# J1771150771X), soldered in series to 
measure 30 ohms each.  See Figure 3.  Replace IC484 with +5v regulator, (h/k part# J1217780002X).  Use 
silicon grease when attaching the new regulator to the heatsink, and tighten it sufficiently to the heatsink with 
its single mounting screw before re-soldering in place. 
5)  When all new parts are installed, replace both the top & bottom cover. 
6)  Test the unit by connecting a music source to a digital input, either optical or coaxial, powering it up and 
monitor the receiver playing normally for extended period of time. 
 
 
 
harman/kardon Incorporated  250 Crossways Park Drive, Woodbury  New York 11797  (516) 496-3400 
2
Models: AVR35/AVR45/AVR65   Subject: No Output in Digital Playback Mode 
 
 
 
 
 
   
 
Model Serial 
number 
120V 
Serial number 
230V RDS 
Status Action 
 
AVR35 
 
 
AVR45 
 
 
 
AVR65 
 
JS0007-01000 
to 
JS0007-14748 
 
JS0001-01000 
to 
JS0001-11139 
 
JS0003-01000 
to 
JS0003-02319 
 
 
JS0005-01000 
to 
JS0005-05956 
 
JS0004-01000 
to 
JS0004-04434 
 
 
Modified by factory 
 
IC484 Overheating; 
Unit’s output ceases and 
“No data” appears in the 
display when using digital 
inputs 
 
Replace R486 and R495 
with (2) 15 ohm 3 watt 
resistors, soldered in 
series to measure 30 
ohms each.  
 Replace IC484 +5v 
regulator  
 
AVR35 
 
AVR45 
 
AVR65 
 
JS0007-14749 
Or higher 
JS0001-11140 
Or higher 
JS0003-02320 
Or higher 
 
JS0005-05957 
Or higher 
JS0004-04435 
Or higher 
 
Modified by factory 
 
 
Modified by factory 
 
 
NONE REQUIRED 
 
 
 
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Here you can read online and download Harman Kardon AVR 45 (serv.man4) Technical Bulletin in PDF. AVR 45 (serv.man4) technical bulletin will guide through the process and help you recover, restore, fix, disassemble and repair Harman Kardon AVR 45 (serv.man4) Audio. Information contained in service manuals typically includes schematics / circuit diagrams, wiring diagrams, block diagrams, printed wiring boards, exploded views, parts list, disassembly / assembly, pcb.