Harman Kardon AVR 125 Service Manual Download Page 3

SAFETY PRECAUTIONS

The following check should be performed for the continued
protection of the customer and service technician.

LEAKAGE CURRENT CHECK

Measure leakage current to a known earth ground (water
pipe, conduit, etc.) by connecting a leakage current tester
between the earth ground and all exposed metal parts of the
appliance (input/output terminals, screwheads, metal
overlays, control shaft, etc.). Plug the AC line cord of the
appliance directly into a 120V AC 60Hz outlet and turn the
AC power switch on. Any current measured must not exceed
o.5mA.

ANY MEASUREMENTS NOT WITHIN THE LIMITS
OUTLINED ABOVE ARE INDICATIVE OF A
POTENTIAL SHOCK HAZARD AND MUST BE
CORRECTED BEFORE RETURNING THE APPLIANCE
TO THE CUSTOMER.

Device

under

test

Test all
exposed metal
surfaces

Also test with
plug reversed
(Using AC adapter
plug as required)

AC Leakage Test

Leakage
current
tester

Reading should
not be above
0.5mA

Earth
ground

3

AVR125

 

 

 

 

 

 

            

 

 

 

harman/kardon 

Summary of Contents for AVR 125

Page 1: ...REMOTE CONTROL FUNCTIONS 11 INSTALLATION AND CONNECTIONS 14 TROUBLESHOOTING GUIDE 16 MICROPROCESSOR RESET 16 UNIT EXPLODED VIEW 17 DISASSEMBLY PROCEDURE 18 AMPLIFIER BIAS ADJUSTMENT 21 BLOCK DIAGRAM 22 IC PINOUTS 23 TRANSISTOR PINOUTS 52 ELECTRICAL PARTS LIST 53 PCB DRAWINGS 62 SCHEMATICS 70 WIRING DIAGRAM 82 PACKAGING 83 harman kardon Inc 250 Crossways Park Dr Woodbury New York 11797 Rev5 2 2005 ...

Page 2: ...ior to applying power to the unit under test 2 After removing an electrical assembly equipped with ES devices place the assembly on a conductive surface such as aluminum foil to prevent electrostatic charge build up or exposure of the assembly 3 Use only a grounded tip soldering iron to solder or unsolder ES devices 4 Use only an anti static solder removal device Some solder removal devices not cl...

Page 3: ...al overlays control shaft etc Plug the AC line cord of the appliance directly into a 120V AC 60Hz outlet and turn the AC power switch on Any current measured must not exceed o 5mA ANY MEASUREMENTS NOT WITHIN THE LIMITS OUTLINED ABOVE ARE INDICATIVE OF A POTENTIAL SHOCK HAZARD AND MUST BE CORRECTED BEFORE RETURNING THE APPLIANCE TO THE CUSTOMER Device under test Test all exposed metal surfaces Also...

Page 4: ...Hz 50 Mod 0 8 Selectivity 10kHz 30dB Video Section Television Format NTSC Input Level Impedance 1Vp p 75 ohms Output Level Impedance 1Vp p 75 ohms Video Frequency Response 10Hz 8MHz 3dB General Power Requirement AC 125V 60Hz Power Consumption 68W idle 540W maximum 2 channels driven Dimensions Width 17 3 inches 440mm Height 6 6 inches 168mm Depth 15 4 inches 390mm Weight 23 8 lb 10 8kg Depth measur...

Page 5: ...n Display Û 6 Tone Mode Pressing this button enables or dis ables the Bass and Treble tone controls When the button is pressed so that the words TONE IN appear in the Main Information Display Û the settings of the Bass and Treble controls may be used to adjust the output signals When the button is pressed once or twice so that the words TONE OUT appear in the Main Information Display Û the output ...

Page 6: ...products such as cam corders and portable audio players Bass Control Turn this control to modify the low frequency output of the left right channels by as much as 10dB when the unit is in the Surround Off mode Set this control to a suitable position for your taste or room acoustics Balance Control Turn this control to change the relative volume for the front left right channels NOTE For proper ope...

Page 7: ...des include Hall 1 Hall 2 Theater and 5 Channel Stereo H VMAx Mode Indicators This indicator lights when the VMAx mode is in use VMAx F appears when the Far Field VMAx mode is selected VMAx N appears when the Near Field VMAx mode is selected See page 22 for a description of the VMAx modes I Logic 7 Mode Indicators These indicators light when the Logic 7 mode is in use LOGIC 7C ap pears for the Cin...

Page 8: ...d with sufficient signal strength to pro vide acceptable listening quality R Auto Indicator This indicator lights when the tuner s Auto mode is in use S Analog Input Indicator This indicator lights when an analog input source has been selected T Coaxial Digital Input Indicators These indicators light to show when a Coaxial Digital Input has been selected U Optical Digital Input Indicators These in...

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