Harman Kardon AVI 100 User Manual

harman/kardon Service Bulletin
Service bulletin # 9706 November 1997 Warranty labor rate: MINOR repair
To: All harman/kardon Service Centers
Models: AVR 10/20/25/3250; AVI 100/150/200
Subject: Remote Control has stopped working
In the event you receive a complaint about a remote control that has stopped working, perform
the following tests:
1) Remove the batteries and confirm they are not weak or defective (battery voltage should be 1.4 volts
or more). Replace batteries if necessary; both batteries
in remote control should be replaced.
2) Point the remote towards the corresponding receiver/amplifier and confirm the remote control
functions operate as intended.
3) If Remote Control still doesn’t work:
Remove batteries, and with an alligator clip lead or other jumper wire, short the positive and negative
tabs inside the control together. (See drawing) This short will drain any remaining charge from
the capacitors in the remote control and re-set the microprocessor.
4) Re-insert batteries and test the functions as per item (2) above.
NOTE: This procedure may also work for other h/k model remote controls not listed above.
harman/kardon Incorporated 250 Crossways Park Drive, Woodbury New York 11797 (516) 496-3400

Harman Kardon AVI 100 Specifications

General

Brand	Harman Kardon
Model	AVI 100
Frequency response	20Hz - 20kHz
Input sensitivity	200mV
Speaker load impedance	8 ohms
Type	Stereo Amplifier

Summary

Remote Control Malfunction Troubleshooting

Battery Condition and Replacement

Verify battery voltage (>=1.4V) and replace both if weak or necessary.

Remote Control Operation Test

Aim remote at receiver/amplifier and confirm function.

Microprocessor Reset and Retest

Short battery terminals to reset, then re-insert batteries and retest.

Low Impedance Protection Circuit Issues

Component Replacement for Intermittent Shutdowns

Replace specified components to resolve intermittent unit shutdowns caused by low impedance.

Idling Current Adjustment Procedure

Adjust idling current to 26mV by measuring emitter voltage of output transistors.

FM Reception and Tuning Alignment

AVR20/AVR20II FM Center Tuning Alignment

Procedure for FM center tuning alignment to improve reception sensitivity.

AVR25/AVR25II FM Center Tuning Alignment

Procedure for FM center tuning alignment to improve reception sensitivity.

Correction for AM/FM IF Adjustment Points

Note on correcting specified adjustment points VR802/VR801 for AM/FM IF.