AVR 235 (serv.man12) - Harman Kardon Audio Service Manual (repair manual)

avr 235 (serv.man12) service manual
Model
AVR 235 (serv.man12)
Pages
114
Size
19.7 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio
File
avr-235-sm12.pdf
Date

Read Harman Kardon AVR 235 (serv.man12) Service Manual online

AVR 235
AUDIO/VIDEO RECEIVER
SERVICE MANUAL
Power for the Digital Revolution
.
®
®
 
 
   
 
 
 
 
   
  
 
 
 
 
 
 
 
 
  
 
 
 
  
   
 
TECHNICAL SPECIFICATIONS 
Technical Specifications
Audio Section
Stereo Mode 
Continuous Average Power (FTC)
65 Watts per channel, 20Hz–20kHz,
@ < 0.07% THD, both channels driven into 8 ohms
5/7 Channel Surround Modes 
Power Per Individual Channel
Front L&R channels:
50 Watts per channel,
@ < 0.07% THD, 20Hz–20kHz into 8 ohms
Center channel:
50 Watts, @ < 0.07% THD, 20Hz–20kHz into 8 ohms
Surround (L & R Side, L & R Back) channels:
50 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)
100dB
Surround System Adjacent Channel Separation 
Analog Decoding 
40dB 
(Pro Logic, etc.) 
Dolby Digital (AC-3) 
55dB 
DTS
55dB
Frequency Response 
@ 1W (+0dB, –3dB)
10Hz–130kHz
High Instantaneous 
Current Capability (HCC)
±35 Amps
Transient Intermodulation 
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: 70/68dB (DIN)
Distortion
Mono/Stereo: 0.2/0.3%
Stereo Separation
40dB @ 1kHz
Selectivity
±400kHz: 70dB
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
±10kHz: 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)
10Hz–8MHz (-3dB)
Video Frequency 
Response (Component)
10Hz–50MHz (-3dB)
General
Power Requirement
AC 220–240V/50Hz
Power Consumption
118W idle, 890W maximum 
(7 channels driven) 
Dimensions (Max)
Width
440mm 
Height
165mm 
Depth
382mm 
Weight
13.95 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.
Harman Kardon is a registered trademark, and Power for the digital revolution is a 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.
DTS and DTS Surround, DTS-ES and DTS Neo:6 are trademarks of Digital Theater Systems, Inc.
VMAx is a trademark of Harman International Industries, Inc., and is an 
implementation of Cooper Bauck Transaural Stereo under patent license.
Logic 7 is a registered trademark of Harman International Industries, Incorporated.
Crystal is a registered trademark of Cirrus Logic Corp.
**Without input anti slewing and output isolation networks.
TM
22199_AVR235_Eng  14/12/04  14:14  Side 43
FRONT PANEL CONTROLS 
Main Power Switch: Press this button to
apply power to the AVR. When the switch is
pressed in, the unit is placed in a Standby
mode, as indicated by the orange LED 3. This
button MUST be pressed in to operate the unit.
To turn the unit off completely and prevent the
use of the remote control, this switch should be
pressed until it pops out from the front panel so
that the word “OFF” may be read at the top of
the switch.
NOTE: This switch is normally left in the “ON”
position.
System Power Control: When the Main
Power Switch 
1 is “ON,” press this button to
turn on the AVR; press it again to turn the unit
off (to Standby). Note that the Power Indicator
3 will turn blue when the unit is on.
Power Indicator: This LED will be illuminated
in orange when the unit is in the Standby mode
to signal that the unit is ready to be turned on.
When the unit is in operation, the indicator will
turn blue.
Headphone Jack: This jack may be used to
listen to the AVR’s output through a pair of head-
phones. Be certain that the headphones have a
standard 6.3 mm stereo phone plug. Note that
the speakers will automatically be turned off
when the headphones are connected.
Surround Mode Group Selector: Press
this button to select the top-level group of
surround modes. Each press of the button will
select a major mode grouping in the following
order:
Dolby Modes 
➜ DTS Digital Modes ➜ DSP
Modes 
➜ Stereo Modes ➜ Logic 7 Modes
Once the button is pressed so that the name of
the desired surround mode group appears in the
Main Information Display ˜, press the
Surround Mode Selector 9 to cycle through
the individual modes available. For example, press
this button to select Dolby modes, and then press
the Surround Mode Selector 9 to choose
from the various mode options.
Speaker Select Button: Press this button
to begin the process of selecting the speaker
positions that are used in your listening room.
(See page 16 for more information on setup and
configuration.)
Front Panel Controls
1
2
3


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Ó 
Ô 
 
Ò 
Ú 
Û 
Ù 
ı 
ˆ 
˜
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Main Power Switch
System Power Control
Power Indicator
Headphone Jack
Surround Mode Group Selector
Speaker Select Button
Selector Buttons
Tone Mode
Surround Mode Selector
Tuning
Tuner Band Selector
Set Button
Preset Stations Selector
Speaker/Channel Input Indicator
Input Source Selector
RDS Select Button
Delay
Digital Optical 3 Input
Surround Mode Indicators
Digital Coax 3 Input
Video 4 input jacks
Bass Control
Balance Control
Treble Control
Digital Input Selector
Channel Select Button
Volume Control
Input Indicators
Main Information Display
Remote Sensor Window
AVR 
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22199_AVR235_Eng  14/12/04  14:14  Side 5
 
FRONT PANEL CONTROLS
Front Panel Controls
Selector Buttons: When you are establishing
the AVR’s configuration settings, use these buttons
to select from the choices available, as shown in
the Main Information Display ˜.
Tone Mode: Pressing this button enables or
disables the Balance, Bass and Treble tone
controls. When the button is pressed so that the
words 
TONE I N
appear in the Main
Information Display ˜, the settings of the
Bass  and Treble Ú controls and of the
Balance control Ò will affect the output
signals. When the button is pressed so that the
words 
TONE OUT
appear in the Main
Information Display ˜, the output signal will
be “flat,” without any balance, bass or treble
alteration.
Surround Mode Selector: Press this button
to select from among the available surround
mode options for the mode group selected. The
specific modes will vary based on the number of
speakers available, the mode group and if the
input source is digital or analog. For example,
press the Surround Mode Group Selector 5
to select a mode grouping such as Dolby or Logic
7, and then press this button to see the mode
choices available. For more information on mode
selection, see page 29.
Tuning Selector: Press the left side of the
button to tune lower frequency stations and the
right side of the button to tune higher frequency
stations. When a station with a strong signal is
reached,
MANUAL TUNED
or 
AUTO
TUNED
will appear in the Main Information
Display ˜ (see page 35 for more information
on tuning stations).
Tuner Band Selector: Pressing this button
will automatically switch the AVR to the Tuner
mode. Pressing it again will switch between the
AM and FM frequency bands, holding it pressed
for some seconds will switch between stereo and
mono receiving and between automatic and
manual tuning mode (See page 35 for more
information on the tuner).
Set Button: When making choices during the
setup and configuration process, press this button
to enter the desired setting as shown in the 
Main Information Display ˜ into the AVR’s
memory. The set button may also be used to
change the display brightness (See page 33).
Preset Stations Selector: Press this
button to scroll up or down through the list of
stations that have been entered into the preset
memory (See page 35 for more information on
tuner programming).
Speaker/Channel Input Indicators: These
indicators are multipurpose, indicating either the
speaker type selected for each channel or the
incoming data-signal configuration. The left, center,
right, right surround and left surround speaker
indicators are composed of three boxes, while the
subwoofer is a single box. The center box lights
when a “Small” speaker is selected, and the two
outer boxes light when “Large” speakers are
selected. When none of the boxes are lit for the
center, surround or subwoofer channels, no speaker
has been selected for that position. (See page 17
for more information on configuring speakers.) The
letters inside each of the center boxes display
active input channels. For standard analog inputs,
only the L and R will light, indicating a stereo
input. When a digital source is playing, the indica-
tors will light to display the channels begin
received at the digital input. When the letters
flash, the digital input has been interrupted. (See
page 19 for more information on the Channel
Indicators).
Input Source Selector: Press this button to
change the input by scrolling through the list of
input sources.
RDS Select Button: Press this button to
display the various messages that are part of the
RDS data system of the AVR’s tuner.
(See page 36 for more information on RDS).
Delay: Press this button to begin the
sequence of steps required to enter delay time
settings (See page 22 for more information on
delay times).
Digital Optical 3 Input: Connect the optical
digital audio output of an audio or video product
to this jack. When the Input is not in use, be
certain to keep the plastic cap installed to avoid
dust contamination that might degrade future 
performance.
Surround Mode Indicators: The current
selected mode or function will appear as one of
these indicators. Note that when the unit is
turned on, the entire list of available modes will
light briefly, and then revert to normal operation
with only the active mode indicator illuminated.
Ó Digital Coax 3 Input: This jack is normally
used for connection to the output of portable
digital audio devices, video game consoles or
other products that have a coax digital jack.
Ô Video 4 Input Jacks: These audio/video
jacks may be used for temporary connection to
video games or portable audio/video products
such as camcorders 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. Set this control to a suitable
position for your taste or room acoustics.
Ò Balance Control: Turn this control to
change the relative volume for the front left/right
channels.
NOTE: For proper operation of the surround
modes this control should be at the midpoint or
“12 o’clock” position.
Ú Treble Control: Turn this control to modify
the high frequency output of the left/right channels
by as much as ±10dB. Set this control to a suitable
position for your taste or room acoustics.
Û Digital Input Selector: When playing a
source that has a digital output, press this button
to select between the Optical
 and Coaxial
 Digital inputs. (See pages 20-22 for more
information on digital audio).
Ù Channel Select Button: Press this button
to begin the process of trimming the channel
output levels using an external audio source.
(For more information on output level trim
adjustment, see page 32).
ı Volume Control: Turn this knob clockwise
to increase the volume, counterclockwise to
decrease the volume. If the AVR is muted, adjust-
ing volume control will automatically release the
unit from the silenced condition.
ˆ Input indicators: The current selected
mode or function will appear as one of these
indicators. Note that when the unit is turned on,
the entire list of available modes will light briefly,
and then revert to normal operation with only
the active mode indicator illuminated.
˜ Main Information Display: This display
delivers messages and status indications to help
you operate the receiver.
¯ Remote Sensor Window: The sensor
behind this window receives infrared signals from
the remote control. Aim the remote at this area
and do not block or cover it unless an external
remote sensor is installed.
22199_AVR235_Eng  14/12/04  14:14  Side 6
Page of 114
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Here you can read online and download Harman Kardon AVR 235 (serv.man12) Service Manual in PDF. AVR 235 (serv.man12) service manual will guide through the process and help you recover, restore, fix, disassemble and repair Harman Kardon AVR 235 (serv.man12) 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.