Harman Kardon HK 3770 (serv.man8) Service Manual ▷ View online
Harman Kardon
Service Manual
HK 3770
2x120 W stereo receiver
Released EU2014
Harman Consumer Group, Inc.
Rev 0, 00/20XX
8500 Balboa Boulevard
Northridge, California 91329
CONTENTS
RESET PROCEDURE
15
FIRMWARE UPGRADE INSTRUCTIONS 16
BILL OF MATERIALS
BILL OF MATERIALS
19
IC PINOUTS
50
TRANSISTOR PINOUTS
64
PRINT DRAWINGS
88
BLOCK DIAGRAMS
106
WIRING DIAGRAM
108
SCHEMATIC DIAGRAMS
109
BOX CONTENTS
2
FRONT PANEL FUNCTIONS
4
BACK PANEL FUNCTIONS
5
REMOTE CONTROL FUNCTIONS
6
TROUBLESHOOTING
8
TECHNICAL SPECIFICATIONS
9
PACKAGE DRAWING
11
EXPLODED VIEW AND PARTS
12
DISASSEMBLY
13
BIAS ADJUSTMENT
14
Introduction
3
HK 3700/3770
Introduction
thank you for purchasing the Harman Kardon® HK 3700/3770 stereo receiver with
which, you are about to begin many years of listening enjoyment. the HK 3700/3770
stereo receiver has been custom-designed to provide excitement and power of the
cinema experience in your living room.
to obtain maximum enjoyment from your new soundbar speaker system, we urge you
to take a few minutes to read through this manual, which:
which, you are about to begin many years of listening enjoyment. the HK 3700/3770
stereo receiver has been custom-designed to provide excitement and power of the
cinema experience in your living room.
to obtain maximum enjoyment from your new soundbar speaker system, we urge you
to take a few minutes to read through this manual, which:
• contains a description of the features of HK 3700/3770 stereo receiver
• Lists the items included in the box
• describes the HK 3700/3770 stereo receiver and its components
• Includes step-by-step instructions that will help you set up and get started
• Lists the items included in the box
• describes the HK 3700/3770 stereo receiver and its components
• Includes step-by-step instructions that will help you set up and get started
with the HK 3700/3770 stereo receiver
In addition, a few minutes spent learning the functions of the various controls will allow
you to take advantage of all the power and refinement of the HK 3700/3770 stereo
receiver.
CONTACT US: If you have any questions about HK 3700/3770 receiver, its installation
or its operation, please contact your retailer or custom installer, or visit our website at:
www.harmankardon.com
you to take advantage of all the power and refinement of the HK 3700/3770 stereo
receiver.
CONTACT US: If you have any questions about HK 3700/3770 receiver, its installation
or its operation, please contact your retailer or custom installer, or visit our website at:
www.harmankardon.com
Description and Features
Harman Kardon heritage and brand legacy has been its two-channel audio for many
years.
as more and more audio content comes from multiple digital-based sources, such as a
‘smart’ tV, smartphone or tablet, playback convenience becomes the driving factor in
entertainment while sound quality remains the foundation of Harman Kardon. the new
Harman Kardon HK stereo receivers try to bring the best of both the worlds: beautiful
two channel stereo sound and latest digital-based sources access.
the following are the features and benefits of the Harman Kardon 3700/3770 stereo
receivers:
years.
as more and more audio content comes from multiple digital-based sources, such as a
‘smart’ tV, smartphone or tablet, playback convenience becomes the driving factor in
entertainment while sound quality remains the foundation of Harman Kardon. the new
Harman Kardon HK stereo receivers try to bring the best of both the worlds: beautiful
two channel stereo sound and latest digital-based sources access.
the following are the features and benefits of the Harman Kardon 3700/3770 stereo
receivers:
• Harman Kardon sound — this has been the foundation of the brand for
many years. High power high current capability with stable power output
even with variation of the load impedance of the speaker drivers.
even with variation of the load impedance of the speaker drivers.
• connectivity — HK stereo receivers feature the best of both the worlds:
classic analog inputs including phono input, FM/aM radio as well as new
digital connectivity with bluetooth, network dLna, vtuner internet radio,
uSb, iOS direct thru uSb with built in superior dac and optical digital input.
digital connectivity with bluetooth, network dLna, vtuner internet radio,
uSb, iOS direct thru uSb with built in superior dac and optical digital input.
• distinctive and elegant design — based on the current design and chassis
of aVR1x1 series.
• advance remote control — the new stereo receivers also support iOS
and android app to fully control the stereo receiver from Harman Kardon
Remote app for maximum ease and enjoyment.
Remote app for maximum ease and enjoyment.
Included Items
the HK 3700/3770 stereo receiver consists of the following accessories:
• System remote control
• ezSet/eQ™ microphone
Harman Kardon
HK 3770 Service Manual
Page 2 of 120
HK 3700/3770
Important Safety Information
4
• aM loop antenna
• FM Loop antenna
• two aaa batteries
• ac power cord
IMPORTANT: If any of these accessories is missing or if any part of your
HK 3700/3770 system fails to operate properly, contact your dealer
immediately.
Important Safety Information
Verify Line Voltage before Use
the HK 3700/3770 has been designed for use with 100- 240 Volt alternating current
(ac). connection to a line voltage other than that for which your HK 3700/3770 is
intended can create a safety and fire hazard, and may damage the unit. If you have
any questions about the voltage requirements for your specific model or about the line
voltage in your area, contact your selling dealer before plugging the unit into a wall
outlet.
(ac). connection to a line voltage other than that for which your HK 3700/3770 is
intended can create a safety and fire hazard, and may damage the unit. If you have
any questions about the voltage requirements for your specific model or about the line
voltage in your area, contact your selling dealer before plugging the unit into a wall
outlet.
Do Not Use Extension Cords
to avoid safety hazards, use only the power cord supplied with your unit. we do not
recommend the use of extension cords with this product. do not run power cords
under rugs or carpets, or place heavy objects on them. damaged power cords should
be replaced immediately by an authorized service center, with a cord, meeting factory
specifications.
recommend the use of extension cords with this product. do not run power cords
under rugs or carpets, or place heavy objects on them. damaged power cords should
be replaced immediately by an authorized service center, with a cord, meeting factory
specifications.
Handle the AC Power Cord Gently
when disconnecting the power cord from an ac outlet, always pull the plug; never pull
the cord. If you do not intend to use your HK 3700/3770 for any considerable length of
time, disconnect the plug from the ac outlet.
the cord. If you do not intend to use your HK 3700/3770 for any considerable length of
time, disconnect the plug from the ac outlet.
Do Not Open the Cabinet
there are no user-serviceable components inside this product. Opening the cabinet may
present a shock hazard, and any modification to the product will void your warranty. If
water or any metal object such as a paper clip, wire or staple accidentally falls inside the
unit, disconnect it from the ac power source immediately, and consult an authorized
service center.
present a shock hazard, and any modification to the product will void your warranty. If
water or any metal object such as a paper clip, wire or staple accidentally falls inside the
unit, disconnect it from the ac power source immediately, and consult an authorized
service center.
CATV or Antenna Grounding
If an outside antenna or cable system is connected to this product, be certain that it is
grounded so as to provide some protection against voltage surges and static charges.
Section 810 of the united States national electrical code, anSI/nFpa no. 70-1984,
provides information with respect to proper grounding of the mast and supporting
structure, grounding of the lead-in wire to an antenna discharge unit, size of grounding
conductors, location of antenna discharge unit, connection to grounding electrodes and
requirements of the grounding electrode.
Note to CATV System Installer: this reminder is provided to call the catV (cable
tV) system installer’s attention to article 820-40 of the nec, which provides guidelines
for proper grounding and, in particular, specifies that the cable ground shall be
connected to the grounding system of the building, as close to the point of cable entry
as possible.
grounded so as to provide some protection against voltage surges and static charges.
Section 810 of the united States national electrical code, anSI/nFpa no. 70-1984,
provides information with respect to proper grounding of the mast and supporting
structure, grounding of the lead-in wire to an antenna discharge unit, size of grounding
conductors, location of antenna discharge unit, connection to grounding electrodes and
requirements of the grounding electrode.
Note to CATV System Installer: this reminder is provided to call the catV (cable
tV) system installer’s attention to article 820-40 of the nec, which provides guidelines
for proper grounding and, in particular, specifies that the cable ground shall be
connected to the grounding system of the building, as close to the point of cable entry
as possible.
Placing the Stereo Receiver
• place the Stereo receiver on a firm and level surface. be certain that the
surface and any mounting hardware can support the Stereo receiver’s
weight.
weight.
• provide proper space above, below, behind and to the sides of the Stereo
receiver for ventilation. Maintain a clearance of at least 12” (30 cm) on each
side of, above and behind the unit.
side of, above and behind the unit.
• If you install the Stereo receiver in a cabinet or other enclosed area, provide
cooling air within the cabinet. under some circumstances, a fan may be
required.
required.
• do not obstruct the ventilation slots on the top of the Stereo receiver or
place objects directly over them.
• do not place the Stereo receiver directly on a carpeted surface.
• do not place the Stereo receiver in moist or humid locations, in extremely
• do not place the Stereo receiver in moist or humid locations, in extremely
hot or cold locations, in areas near heaters or heat registers, or in direct
sunlight.
sunlight.
Harman Kardon
HK 3770 Service Manual
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HK 3700/3700 Receiver Front panel controls
5
HK 3700/3770
HK 3700/3700 Receiver Front Panel Controls
the following are the fron panel controls available in the HK 3700/3770 stereo receiver:
1. power indicator
2. power switch
3. play/pause
4. Menu
5. back
6. Select previous
7. OK
8. Select next
9. Message display
2. power switch
3. play/pause
4. Menu
5. back
6. Select previous
7. OK
8. Select next
9. Message display
10. tuning
11. tuner mode selector
12. Harman Volume
13. bluetooth
14. Source selector
15. Volume control
16. phono input
11. tuner mode selector
12. Harman Volume
13. bluetooth
14. Source selector
15. Volume control
16. phono input
1. Power indicator: this indicates the status of the stereo receiver whether it is in
Operational, OFF, or sleep mode.
2. Power switch: press this button to turn the stereo receiver On. when the HK
3700/3770 is in Standby mode (the power Indicator is amber), short press this button
to turn the system On (the power Indicator turns white).
the receiver goes to Standby mode automatically through the following:
Operational, OFF, or sleep mode.
2. Power switch: press this button to turn the stereo receiver On. when the HK
3700/3770 is in Standby mode (the power Indicator is amber), short press this button
to turn the system On (the power Indicator turns white).
the receiver goes to Standby mode automatically through the following:
• 30 minutes of inactivity in Operational mode
• Short press the power button on the front panel
• Short press the OFF button on the remote control or remote app
• Short press the power button on the front panel
• Short press the OFF button on the remote control or remote app
the receiver can be brought back to Operational mode through the following:
• Short press on the power button on the front panel
• Short press on the source button
• audio signal from bluetooth device (HK 3770 Only)
• Short press on the source button
• audio signal from bluetooth device (HK 3770 Only)
3. Play/Pause: press this button to play or pause the audio stream.
4. Menu: press his button to choose from different menu options.
5. Back: press this button to go back to the previous menu.
6. Select previous: press this button to select the previous file to play.
7. OK : this button is used to make selections within the on-screen menu system for
some source devices.
8. Select next: press this button to play the next file.
9. Message Display: Various messages appear in this display in response to commands.
In normal use, the upper Line will display the current source and audio input (analog or
one of the digital audio inputs). the Lower Line displays the current speaker group (if
any are active) and the dSp mode. Other messages may appear for some sources, such
as the bridge docking station and the tuner.
10. Tuning: use these buttons to navigate the receiver’s menus. when the radio is the
active source, use these buttons to tune stations according to the settings of the tuning
Mode button.
11. Tuner Mode selector: this button toggles between manual (one frequency step
at a time) and automatic (seeks frequencies with acceptable signal strength) tuning
mode. It also toggles between stereo and mono modes when an FM station is tuned in.
12. Harman Volume: this button cycles the Harman Volume function between high,
low and off.
13. Bluetooth: the bluetooth button is used to set the stereo receiver into bluetooth
mode. you can pair system with bluetooth-enabled devices using this button.
14. Source selector: press these buttons to select the active source.
15. Volume Control: turn this knob clockwise to raise the volume and anticlockwise to
lower the volume, which will be shown in decibels (db) in the Message display.
16. Phono input: this has a built-in preamp. you can only plug a record player into a
phono input to connect it to the amplifier.
5. Back: press this button to go back to the previous menu.
6. Select previous: press this button to select the previous file to play.
7. OK : this button is used to make selections within the on-screen menu system for
some source devices.
8. Select next: press this button to play the next file.
9. Message Display: Various messages appear in this display in response to commands.
In normal use, the upper Line will display the current source and audio input (analog or
one of the digital audio inputs). the Lower Line displays the current speaker group (if
any are active) and the dSp mode. Other messages may appear for some sources, such
as the bridge docking station and the tuner.
10. Tuning: use these buttons to navigate the receiver’s menus. when the radio is the
active source, use these buttons to tune stations according to the settings of the tuning
Mode button.
11. Tuner Mode selector: this button toggles between manual (one frequency step
at a time) and automatic (seeks frequencies with acceptable signal strength) tuning
mode. It also toggles between stereo and mono modes when an FM station is tuned in.
12. Harman Volume: this button cycles the Harman Volume function between high,
low and off.
13. Bluetooth: the bluetooth button is used to set the stereo receiver into bluetooth
mode. you can pair system with bluetooth-enabled devices using this button.
14. Source selector: press these buttons to select the active source.
15. Volume Control: turn this knob clockwise to raise the volume and anticlockwise to
lower the volume, which will be shown in decibels (db) in the Message display.
16. Phono input: this has a built-in preamp. you can only plug a record player into a
phono input to connect it to the amplifier.
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HK 3770 Service Manual
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