AVR 630 - Harman Kardon Audio Technical Bulletin (repair manual)

avr 630 technical bulletin
Model
AVR 630
Pages
3 Few pages! See other manuals at the bottom of the first or last page.
Size
1.16 MB
Type
PDF
Document
Technical Bulletin
Brand
Device
Audio
File
avr-630.pdf
Date

Read Harman Kardon AVR 630 Technical Bulletin online

 
harman/kardon, Incorporated           
           250 Crossways Park Dr.   Woodbury, New York   11797 
1
 
harman/kardon          
  
Service Bulletin
 
 
Service bulletin # HK2004-04 October 2004  
 
 
Warranty labor rate: MAJOR repair 
 
To:  All harman/kardon Service Centers 
 
Model: AVR430, AVR630 
 
Subject: Rewiring Bias/Fan cables 
 
In the event you receive an AVR430 or AVR630 with the complaint: “the unit intermittently goes in 
standby or the fan runs constantly” perform the following modification. Please note other 
component or connection failures can cause the unit to go in to standby. 
 
Synopsis: Hard wire Bias/Fan cables (7 cables, 12 connectors) from Bias PCB’s to main PCB, surround PCB. 
 
   Recheck all bias voltages. 
 
1)  Remove the top cover 
2)  Remove the DSP and Processor boards. 
3)  Locate and identify Bias cables connecting Bias and Surround PCB’s to main PCB: 
 
MAIN PCB Location: P805, N801, N802, N803, N804  
SURROUND PCB Location: N301, P307 
BIAS PCB Location: P812, P813, P814, P815, P816  
 
 
 
harman/kardon, Incorporated           
           250 Crossways Park Dr.   Woodbury, New York   11797 
2
 
4)  Unplug each the cable on the Bias PCB, desolder the female plugs, cut the connectors off each wire, 
strip the insulation 1/8” on each end and solder directly to the PCB assembly in each location. 
5)  For locations N801, N802, N803, N804 on the Main PCB, set the unit on its side and remove the 
bottom grille.  (See Figure 2)  Desolder and remove each connector. Cut the connectors off each wire, 
strip the insulation 1/8” on each end and solder directly to the PCB assembly in each location. 
6)  For location P805 (see Figure 1) on the Main PCB, unplug the cable, carefully cut away the female 
plug with diagonal cutters on the PCB surface, leaving the three conductors intact.  Cut the connector 
off each wire, strip the insulation 1/8” on each end, slide a piece of shrink tubing on each conductor 
and solder each wire directly to the three conductors on the PCB.  Heat the shrink tubing to complete 
the connection, and add some silicon seal or similar adherent to affix the wires on the PCB. 
 
 
 
 
 
 
 
harman/kardon, Incorporated           
           250 Crossways Park Dr.   Woodbury, New York   11797 
3
7)  Replace the DSP and Processor boards 
8)  Recheck all bias voltages, following the instructions below: 
 
MAIN AMP IDLE CURRENT ADJUSTMENT PROCEDURE 
(Set variable resistors for MAIN/SURROUND Board) 
 
Specialized equipment/parts needed: 
Variable AC transformer (“Variac” type) to adjust and monitor AC line voltage. 
Two pin harness plug to connect DMM to idle current test points, hk part# 55212910NR or equivalent 
 
Conditions: 
No Signal; No Load 
AC Line Voltage adjust to: 120V/60Hz (120v model) or 230V/50Hz (230v model) 
 
After turning the unit ON for 25 minutes or more to keep the Power/Driver TR at normal temperature, 
adjust the DC voltage at the two pin connector to the specified value by rotating the variable resistors.  
VR71-74 are located on the Bias PCB’s. 
P801-804 are located on the main PCB just below the Bias PCB’s.  To guide/seat the two pin harness plug 
into the sockets, you may have to attach the harness wire to a long blade screwdriver as P801-803 are in 
a deep recess. 
 
CHANNEL  
ADJUSTMENT 
MEASUREMENT POINT 
VOLTAGE 
FRONT  L CHAN 
VR71 
P801 
23mV   ±2mV   
FRONT R CHAN 
VR74 
P804 
23mV   ±2mV   
SURROUND L CHAN 
VR73 
P803 
23mV   ±2mV   
SURROUND R CHAN 
VR72 
P802 
23mV   ±2mV   
 
SURROUND BACK AMP IDLE CURRENT ADJUSTMENT PROCEDURE  
Same conditions as above. 
 
After turning the unit ON for 25 minutes or more to keep the Power/Driver TR at normal temperature, 
adjust the voltage value at the two pin connector to the specified value by rotating the variable resistors.  
VR31,32,51 and P301,308,309 are located at the top edge of the Surround PCB 
 
CHANNEL  
ADJUSTMENT 
MEASUREMENT POINT 
VOLTAGE 
CENTER 
VR32 
P308 
23mV   ±2mV   
SURROND BACK L 
VR31 
P301 
23mV   ±2mV   
SURROND BACK R 
VR51 
P309 
23mV   ±2mV   
 
9)  After 5 minutes, check all voltages again at measurement points and re-adjust if necessary. 
10)  After more 5 minutes, check all voltages again at measurement points and re-adjust if necessary. 
11)  Replace the top cover and test the unit. 
 
 
MODEL 
SERIAL NUMBER (120V) 
SERIAL NUMBER (230V) 
STATUS 
ACTION 
AVR430 
TF0001-01000 
to 
TF0001-08116 
TF0006-01000 
to 
TF0006-06663 
Unit may shut down or fan 
may run continuously 
Hard wire bias cables 
to PCB’s 
AVR430 
TF0007-08117 and above 
TF0007-06664 and above 
Modified by Factory 
None Required 
AVR630 
TF0002-01000 
to 
TF0002-11138 
TF0007-01000 
to 
TF0007-05650 
Unit may shut down or fan 
may run continuously 
Hard wire bias cables 
to PCB’s 
AVR630 
TF0002-11139 and above 
TF0007-05651 and above 
Modified by Factory 
None Required 
 
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Download Harman Kardon AVR 630 Technical Bulletin

Here you can read online and download Harman Kardon AVR 630 Technical Bulletin in PDF. AVR 630 technical bulletin will guide through the process and help you recover, restore, fix, disassemble and repair Harman Kardon AVR 630 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.