Read Harman Kardon AVR 7500 (serv.man8) Service Manual online
AVR 7500 Audio/Video Receiver
SERVICE MANUAL
Power for the Digital Revolution
™
®
TECHNICAL SPECIFICATIONS
Technical Specifications
Audio Section
Stereo Mode
Continuous Average Power (FTC)
Stereo Mode
Continuous Average Power (FTC)
110 Watts
per channel, 20Hz–20kHz,
@ < 0.07% THD, both channels driven into 8 ohms
Five-Channel Surround Modes
Power Per Individual Channel
Power Per Individual Channel
Front L&R channels:
100 Watts
per channel,
@ < 0.07% THD, 20Hz–20kHz into 8 ohms
Center channel:
100 Watts
, @ < 0.07% THD, 20Hz–20kHz into 8 ohms
Surround channels:
100 Watts
per channel,
@ < 0.07% THD, 20Hz–20kHz into 8 ohms
Input Sensitivity/Impedance
Linear (High Level)
200mV/47kohms
Signal-to-Noise Ratio (IHF-A)
95dB
Surround System Adjacent Channel Separation
Analog Decoding
40dB
(Pro Logic, etc.)
Dolby Digital (AC-3)
Dolby Digital (AC-3)
55dB
DTS
55dB
Frequency Response
@ 1W (+0dB, –3dB)
10Hz–100kHz
High Instantaneous
Current Capability (HCC)
Current Capability (HCC)
±75 Amps
Transient Intermodulation
Distortion (TIM)
Distortion (TIM)
Unmeasurable
Rise Time
16 µsec
Slew Rate
40V/µsec**
FM Tuner Section
Frequency Range
87.5–108MHz
Usable Sensitivity
IHF 1.3 µV/13.2dBf
Signal-to-Noise Ratio
Mono/Stereo: 70/65dB (DIN)
Distortion
Mono/Stereo: 0.15/0.3%
Stereo Separation
35dB @ 1kHz
Selectivity
±300kHz: 65dB
Image Rejection
80dB
IF Rejection
90dB
AM Tuner Section
Frequency Range
522–1611kHz
Signal-to-Noise Ratio
45dB
Usable Sensitivity
Loop: 500µV
Distortion
1kHz, 50% Mod: 0.8%
Selectivity
±9kHz: 30dB
Video Section
Video Format
PAL/NTSC
Input Level/Impedance
1Vp-p/75 ohms
Output Level/Impedance
1Vp-p/75 ohms
Video Frequency Response
(Composite and S-Video)
(Composite and S-Video)
10Hz–8MHz (–3dB)
Video Frequency
Response (Component)
Response (Component)
10Hz-35MHz (-3dB)
General
Power Requirement
AC 220-240V/50Hz
Power Consumption
125W idle, 1100W
maximum
Dimensions (Max)
Width
440mm
Height
193mm
Depth
519mm
Weight
22.3
kg
Depth measurement includes knobs, buttons and terminal connections.
Height measurement includes feet and chassis.
All features and specifications are subject to change without notice.
Height measurement includes feet and chassis.
All features and specifications are subject to change without notice.
Harman Kardon is a registered trademark, and Power for the digital revolution is a
trademark, of Harman International Industries, Inc.
trademark, of Harman International Industries, Inc.
is a trademark of Harman International Industries, Inc.
(Patent No. 5,386,478).
*Manufactured under license from Dolby Laboratories.
“Dolby,” “Pro Logic,” “Pro Logic II” and the Double-D symbol are
trademarks of Dolby Laboratories. Confidential Unpublished
Works. ©1992–1999 Dolby Laboratories, Inc. All rights reserved.
“Dolby,” “Pro Logic,” “Pro Logic II” and the Double-D symbol are
trademarks of Dolby Laboratories. Confidential Unpublished
Works. ©1992–1999 Dolby Laboratories, Inc. All rights reserved.
DTS and DTS Surround, DTS-ES and DTS Neo:6 are trademarks of Digital Theater
Systems, Inc.
Systems, Inc.
UltraStereo is a trademark of UltraStereo Corp.
VMAx is a trademark of Harman International Industries, Inc., and is an
implementation of Cooper Bauck Transaural Stereo under patent license.
implementation of Cooper Bauck Transaural Stereo under patent license.
Logic 7 is a registered trademark of Lexicon, Inc.
Crystal is a registered trademark of Cirrus Logic Corp.
HDCD is a registered trademark of Pacific Microsonics, Inc.
**Without input anti slewing and output isolation networks.
TM
TROUBLESHOOTING GUIDE
Troubleshooting Guide
Processor Reset
In the rare case where the unit’s operation or the
displays seem abnormal, the cause may involve
the erratic operation of the system’s memory or
microprocessor.
displays seem abnormal, the cause may involve
the erratic operation of the system’s memory or
microprocessor.
To correct this problem, first unplug the unit from
the AC wall outlet and wait at least three min-
utes. After the pause, reconnect the AC power
cord and check the unit’s operation. If the system
still malfunctions, a system reset may clear the
problem.
the AC wall outlet and wait at least three min-
utes. After the pause, reconnect the AC power
cord and check the unit’s operation. If the system
still malfunctions, a system reset may clear the
problem.
To clear the AVR 7500’s entire system memory
including tuner presets, output level settings,
delay times and speaker configuration data, first
put the unit in Standby by pressing the System
Power Control button 2. Next, press the
Tone Mode 8 and the RDS ^ buttons simul-
taneously.
including tuner presets, output level settings,
delay times and speaker configuration data, first
put the unit in Standby by pressing the System
Power Control button 2. Next, press the
Tone Mode 8 and the RDS ^ buttons simul-
taneously.
The unit will turn on automatically and display
the R E S E T message in the Main
Information Display Y. Note that once you
have cleared the memory in this manner, it is nec-
essary to re-establish all system configuration
settings and tuner presets.
the R E S E T message in the Main
Information Display Y. Note that once you
have cleared the memory in this manner, it is nec-
essary to re-establish all system configuration
settings and tuner presets.
NOTE: Resetting the processor will erase any
configuration settings you have made for speak-
ers, output levels, surround modes, digital input
assignments as well as the tuner presets. After a
reset the unit will be returned to the factory pre-
sets, and all settings for these items must be
reentered.
configuration settings you have made for speak-
ers, output levels, surround modes, digital input
assignments as well as the tuner presets. After a
reset the unit will be returned to the factory pre-
sets, and all settings for these items must be
reentered.
If the system is still operating incorrectly, there
may have been an electronic discharge or severe
AC line interference that has corrupted the mem-
ory or microprocessor.
may have been an electronic discharge or severe
AC line interference that has corrupted the mem-
ory or microprocessor.
If these steps do not solve the problem, consult
an authorized Harman Kardon service depot.
an authorized Harman Kardon service depot.
SYMPTOM
CAUSE
SOLUTION
Unit does not function when Main
• No AC Power
• Make certain AC power cord is plugged
Power Switch 1 is pushed
into a live outlet
• Check to see if outlet is switch controlled
Display lights, but no sound
• Intermittent input connections
• Make certain that all input and speaker
or picture
connections are secure
• Mute is on
• Press Mute button
• Volume control is down
• Turn up volume control
Units turns on, but Front-Panel
• Display brightness is turned off
• Follow the instructions in the Display Brightness section
Display does not light
on page 37 so that the display is set to VFD FULL
No sound from any speaker;
• Amplifier is in protection mode
• Check speaker-wire connections for shorts at receiver
light around Power switch 2 is red
due to possible short
and speaker ends
• Amplifier is in protection mode
• Contact your local Harman Kardon service depot
due to internal problems
No sound from surround or
• Incorrect surround mode
• Select a mode other than Stereo
center speakers
• Input is mono
• There is no surround information from mono sources (except with
Theater and Hall surround modes)
• Incorrect configuration
• Check speaker mode configuration
• Stereo or Mono program material
• Some surround modes may not create rear-channel information
from nonencoded programs
Unit does not respond to
• Weak batteries in remote
• Change remote batteries
remote commands
• Wrong device selected
• Press the AVR Selector
5
• Remote sensor ¯ is obscured
• Make certain front-panel sensor is visible to remote or
connect remote sensor
Intermittent buzzing in tuner
• Local interference
• Move unit or antenna away from computers, fluorescent lights,
motors or other electrical appliances
Letters flash in the Channel Indicator
• Digital audio feed paused
• Resume play for DVD
Display Q and Digital Audio stops
• Check that Digital Signal is fed to the Digital Input selected
HDCD encoded disc does not trigger
• Surround mode in use
• Select “Surround Off” mode
HDCD indicator
• Analog feed in use
• Connect and select digital connection to CD player
