Kenwood KR-V77R User manual

KR-\V/77
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|
KE
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WO
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SERVICE MANUAL
©1988-6 PRINTED IN JAPAN
B51-3569-00 (0) 1648
Slide switch (POWER) Front glass Metallic cabinet Knob ass‘y
(S40-1064-05) (B10-0962-03) (A01-1650-01) (K29-3253-04)
Knob (GE) Panel Knob (SEL)
(K29-2994-03) (A20-5535-02) (K29-2995-03)
KENIWOOD auon-vine|} ovens mucaiven Knevern
REARS AT a we
Phone jack (PHONES) Knob (GE) Escutcheon Knob (SEL) Remote controller ass'y*
(E11-0162-05) (K29-2993-03) (BO7-1815-04) (K29-2996-03) (A70-)
Knob (SPEAKERS) Foot Knob (MATRIX SURROUND) Dressing plate
({K27-1304-04)x2 (JO2-01 70-04) x4 (K29-2999-04) ‘ (BO3-2451-04)
Slide switch* Miniature phone jack (SYSTEM) AC outlet*
($31-2072-05) {E11-0165-05) (E03-0086-05)
Screw terminal
board (2P) ANT Binding post Phono jack Lock terminal board (8P) SPEAKER Slide switch (Power type) AC*
({E20-0318-05) (NO8-01 28-35) (E13-0487-05) (£20-0823-05) ($31-2128-05)
Puxtaid
Phono jack (8P) TAPE1,2 Lock terminal board (SURROUND SP) AC power cord*
(E13-0820-05) (€20-0475-05) _ (E30-)
Phono jack (6P) PHONO,CD,AUX Phono jack (6P) VIDEO1,2 Slide switch Power cord bushing
(E13-0621-05) {E13-0621-05) (IMPEDANCE SELECTOR) (J42-0083-05)
($31-2136-05)
* Refer to parts list on page 51.

KR-V77R
CONTENTS/CONTROLS
AND
INDICATORS
CONTENTS
|
CONTROLS
AND
INDICATORS
......--.--0-0005
2
DISASSEMBLY
FOR
REPAIR
..........-.-
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14
BLOCK
LEVEL
DIAGRAM
........--0+20+-055
15
CIRCUIT
DESCRIPTION
Description
of
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Microprocessor : uPD75108CW-170 or -200
(X14-2320-11
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18
ADJUSTMENT
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24
REGLAGE
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25
CONTROLS
AND
INDICATORS
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ABGLEICH .. 1... cee ce ee ee eee eee 26
ADJUSTMENT/REGLAGE/ABGLEICH............ 27
VOLTAGE CHECK TABLE .......-.-0+2+2-0>- 28
PC BOARD (COMPONENT SIDE VIEW) .......-.. 29
PC BOARD (FOIL SIDE VIEW) ......22 0-000 eee 33
CIRCUIT DIAGRAM ..... cusgre fata: Sinvace.eSeite: 0 Waar 37
EXPLODED VIEW ... 2... cece eet ee eee 49
PARTS LIST 2.1.0... eee eee et ene ene nee 51
SPECIFICATIONS ........50-02005 BACK COVER
Saar,
KR-V77R
@ POWER switch
Press
this
switch
to
turn
on
power.
Press
it
again
to
turn
power off.
@ SPEAKERS A and B switches
A,B
OFF
-
This
position
silences
all
speakers
to
permit
private
use
of
headphones.
A
ON
-
Activates
speakers
connected
to
the
SPEAKERS
A
terminals
on
the
rear
panel.
B
ON
-
Activates
speakers
connected
to
the
SPEAKERS
B
terminals
on
the
rear
panel.
A,B
ON
-
Activates
speakers
connected
to
the
SPEAK-
ERS
A
and
B
terminals
simultaneously.
Note:
——_—_____________-_____—-
When
the
SPEAKERS
A
and
B
switches
are
used
at
the
same
time,
the
speakers
connected
to
the
SPEAKERS
A
and
B
terminals
are
connected
in
series.
In
this
respect,
whenever
using
the
SPEAK-
ERS
A
and
B
switches
at
the
same
time,
be
sure
that
two
pairs
of
speakers
are
connected
to
the
terminals
A
and
B,
otherwise
no
sound is output.
© PHONES jack
Stereo
headphones
are
plugged
into
this
jack.
© EQ (Equalizer) PRESET keys
Use
these
keys
to
store
equalizer
curves
in
memory
or
to
‘recall them.
PGM:
User-adjusted
equalizer
curves
can
be
programmed
as
desired
and
stored
in
memory:
up
to
five
patterns.
SET:
Five
factory-preset
equalizer
curves
are
stored
in
memory.
Up
to
10
equalizer curve
memories
are
available
in
total.
Press
the
PGM/SET
key
to
select
either
the
user-
programmed
pattern
or
the
factory-preset
pattern.
© Equalizer level controls
Adjust
these
controls
up
and
down
to
equalize
the
sound
by +12 dB to the center frequency indicated.
@ Equalizer function keys
@ Equalizer preset mode key (PGM/SET)
Each
time
this
key
is
pressed,
the
recall
mode
of
the
equalizer
preset
curves
alternates
between
PGM
(user
programmed
patterns)
and
SET
(factory
preset
patterns).

CONTROLS AND INDICATORS
@ Equalizer preset MEMORY key
This key is used to store an equalizer curve into the PGM
PRESET memories. First, select the desired equalizer curve
and then press this key. Then press any of the PRESET (A
to E) keys. The selected equalizer curve will be stored in
the memory indicated by the PRESET key pressed.
@ Equalizer (EQ, ON) key
Press this switch to ON and the frequency characteristic
will be modified by passing through the graphic equalizer.
In the DEFEAT position, the frequency characteristic
remains unchanged.
@ EQ REC key
Used when recording the source onto the tape’ deck
through the equalized response of the graphic equalizer.
@ System memory keys
@ SYSTEM MEMORY channel key (M-1/M-2)
Two groups of memory can be used with the preset
channel key of the System Memory system. After entering
the memory preset mode by pressing the SYSTEM MEMO-
RY key, press the M-1 or M-2 key.
@ System MEMORY key
This key is used to store the currently playing condition in
memory.
© DOLBY SURROUND key
Press this key to activate or deactivate the surround output.
In the KR-V77R, MATRIX surround mode is automatically
entered when this key is pressed.
With the KR-V77R, when the speaker selector switch at
the rear is set to 80. OR MORE, the surround mode cannot
be obtained.
© Input selector switches
TAPE 1-Press this switch to play back a tape deck
connected to the TAPE 1 jacks.
TAPE 2/MONITOR - Press this switch to play back a tape
deck connected to the TAPE 2 jacks. (The TAPE 2 switch
is Operated in priority to any other audio input systems.)
VIDEO 1 - Selects the video recorders connected to the
VIDEO 1 jacks. :
VIDEO 2-Select the video recorders connected to the
VIDEO 2 jacks.
CD - Selects the source connected the CD jacks.
PHONO -Selects the program source played on the
turntable.
TUNER - Selects the tuner mode.
AUX - Selects the source connected the AUX jacks.
@ AUDIO INJECTION key
Press this key ON when replacing the sound of VIDEO 2
with that of AUDIO source is required on dubbing between
VIDEO sources.
KR-V77F
@® MUTING key
When the muting key is pressed, the MUTING indicator in
the display window will.flash, and the overall listening
sound level is reduced.
When the key is pressed again. you can restore exactly the
same listening level as before.
@ REMOTE SENSOR
Point the supplied remote control unit towards this sensor
and operate.
@® REMOTE POWER STAND BY indicator
This indicator lights so far as the power cord is plugged
into the AC outlet. It is lit to show that the POWER switch
on the front panel or the POWER key on the remote control
unit can be activated.
@® BALANCE contro! key
Governs the amount of sound coming from each paired
speakers to get optimum stereo effect. Pressing the RIGHT
key will decrease the left channel volume and pressing the
LEFT key will decrease the right channel volume. When the
BALANCE controls is pressed, display window shows the
BALANCE indicator.
@ MAIN VOLUME control key
This contro! adjusts the left- and right-channel volumes
simultaneously. Set it for the desired listening level.
Pressing the up (A) side increases the volume and pressing
the down (V) side decreases it.
Indicator (A) or (V) blinks when this unit is operated
directly or with the remote control unit.
The volume level of the rear speakers are controlled at the
same time.
@ Band selector switches
FM - For FM broadcasts.
AWMi - For AM broadcasts.
@® Numeric (1 ~ 0/10) keys
Use these keys to:
1) input directly the digits of frequencies, or
2) store and recall frequencies in the preset channel.
@ Tunning function keys
@ DIGIT key
In the station name input mode, pressing this key advances
the column after selecting the character with the Tuning
UP/DOWN key. When this operation is repeated four time,
the station name input mode will be released automatically.
@ CHARACTER key
Press this key to activate the station name input mode.

KR-V77R
CONTROLS AND INDICATORS
@ PRESET SCAN key
Use this key for preset channel scanning.
When a frequency stored in the preset memory is being
received, pressing this key shifts the reception to the next
frequency stored in the preset memory. (The preset
channels are scanned in the order 1, 2...... 11,12... 20,)
To stop a scanning operation, press the SCAN key again.
@ MEMORY key
When the input mode is TUNER, use this key to store new
broadcast station data in the preset channel memory. By
pressing the MEMORY key, setting the preset channel to
1-10 or 11-20 and by pressing one of the numeric keys,
the frequency being received is stored in the memory in
the numeric key pressed.
@ DIRECT key
Used to tune to the station directly. Input the desired
frequency numerics with the numeric keys after pressing
the DIRECT key.
@ Preset function (1-10/11-20) key
Used to select 1-10 or 11-20 setting for the preset
channel. In either FM or AM mode, 20 stations can be
preset as random as each setting (1-10" or 11-20") can
contain 10 preset stations. indicator “1-10” lights when
“1-10” setting is used, and indicator “11-20” lights when
“41-20” setting is used.
@ AUTO/MANUAL (MONO) key
When this key is pressed, the AUTO indicator will light. The
frequency will automatically stop at a station in automatic
tuning mode. When a stereo broadcast is received, the
output sound is automatically changed to stereo.
@ TUNING keys
Used to change the frequency. Pressing UP side will
advance to the higher frequency and pressing DOWN side
to the lower frequency.
In the station name input mode, this key is used to select
the character.
@® Display window
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@ In graphic equalizer mode, displays the equalizer level
display, the music spectrum analyzer display and peak
hold display.
@ Displays when storing or recalling equalizer preset
channel in memory.
@® Lights when the Memory (EQ) key is pressed to store
the desired equalizer curve.
(@ Lights when the TAPE-2 key is pressed.
@ VIDEO monitor out indicator.
© Lights when the AUDIO INJECTION key is pressed.
@ This displays the input mode, preset channel, station
name, front volume level, rear level, balance, DOLBY
surround (KR-V87R), EQ preset channel, SPI level
(KR-V87R), system memory indicator.
“1-10"or “11-20” lights according to the selection of
the preset function keys.
@) Front volume level indicator
This indicator displays the volume level for the front-
channel speakers. ,
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in
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VOLUME
LEVEL
@® Rear volume level indicator (KR-V87R)
The volume level of the rear-channel speakers is indicat-
ed within a + 20 dB range.
@ Flashes when the MUTING key is pressed.
@ Displays the digital frequency display.
@ Displays the tuner band “FM” or “AM”
In tuner mode, lights when a stereo broadcast is tuned
in.
@ In tuner mode, lights when a station is tuned in.
Lights during auto tuning.
@ Lights when the MEMORY key is pressed.
@ This indicator lights when EQ REC (equalizer recording)
key is pressed.
Lights when the Equalizer (EQ. ON) key is set to “ON”.
Lights when the Equalizer (EQ.. ON) key is set to
“DEFEAT”.
@ Lights when the Equalizer preset mode (PGM/SET) key
is set to “PGM”.
‘@ Lights when the Equalizer preset mode (PGM/SET) key
is set to “SET”.

CONTROLS AND INDICATORS
@ Listening to AM/FM
1. Press the Power switch to ON.
2. Press the TUNER key of the input selector.
3. Select FM or AM of the band (FM/AM) selector.
4. Tune to the required station with following proce-
dures: Auto tuning, Manual tuning or Direct tuning.
Auto tuning
1. Press the AUTO/MANUAL (MONO) key to set to
“AUTO”.
2. Press the UP or DOWN TUNING key: The frequency will
automatically increase or decrease until a station with
sufficient signal level is received. To stop the frequency
scanning before a station is received, press the
AUTO/MANUAL key to set to “MANUAL”.
3. Adjust the VOLUME control to the required listening
level and use the graphic equalizer control to adjust the
sound to your own preference.
Manual tuning
1. Press the AUTO/MANUAL (MONO) key to set to
“MANUAL”.
2. Press the UP/DOWN TUNING key to tune in the desired
Station.
To continuously increase or decrease frequencies, hold
the TUNNING key depressed.
3. Adjust the VOLUME control to the required listening
level and use the graphic equalizer control to adjust the
sound to your own preference.
Direct tuning
1. Select FM or AM with the FM, AM selector switch.
2. Press the DIRECT key.
3. Input the desired frequency with numeric keys.
4, The receiver enters the radio reception mode just after
the frequency value has been input.
(If the input value is outside the tuning range, the
frequency display flashes for 5 seconds and the receiver
returns to the radio reception mode of the last channel.)
@ Presetting broadcast station data
In total up to 20 stations data (station frequency and
station name) can be stored in memory.
1. Select the desired station with either AUTO tuning,
MANUAL tuning or DIRECT tuning.
2. Input the broadcast station name in accordance with
the character input procedure.
For the broadcast station names, up to 4 characters can
be input.
@ When the contents in item 2 is not required for display
memory. proceed to item 3 after item 1.
3. Press the preset function key to select 1-10" or
“14-20”.
4. Press the MEMORY key. (The MEMORY indicator
lights.)
5. Press one of the numeric keys: The frequency being
tuned in and the station name are stored.
Character input procedure
1. Press the CHARACTER button to set the character
input mode. The first column of the character display
section begins flashing.
2. Press the TUNING UP/DOWN key to select the
character.
3. When the desired character is displayed, press the
DIGIT key.
Flashing will shift to the next column.
4. Repeat procedure 3 and 4 for four times to complete
inputting. The character input mode will be released.
@ Even in the middle of inputting. pressing the CHARAC-
TER key again will release the character input mode. At
this time, the data which has been input is valid.
Example 1: To preset the 91.50 MHz FM broadcast
and a station name “W N Y” when the
station other than the preset channel
memories is received.
1. Tune to 91.50 MHz FM broadcast.
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2. Press the CHARACTER key.
3. Press the TUNING UP key twenty-three time to select
Wy"
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KR-V77R
CONTROLS AND INDICATORS
4. Press the DIGIT key.
5. TUNING UP key fourteen times to select “N”.
_A>B>C>D>E>F>G>H>1>J>K>L>MPN
6. Press the DIGIT key.
7. TUNING UP key twenty-five times to select “Y”.
_A>B-C-D—-E>F>G--H>1>J+K>L>M>N>
O-P>0>R>S?T-U-V>W>xXY
8. As the fourth column should be left blank, press the
DIGIT key twice or press the CHARACTER key.
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Af
INT
dd
WN
Example 2: To change the station name from
“WHY 8'" for 810 kHz AM broadcast
memorized in 12 preset channel to “W,
GY":
1. Recall the 12 preset channel with the PRESET 1-
10/11-20-switch and the PRESET-key according to
“Recalling the Preset Memory”.
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WHY Ios
2. Press the CHARACTER key.
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si
WKH YA fos
3. Press the DIGIT key to shift the flashing character to the
next column since the first character ““W” should be left
as it is.
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5. Press DIGIT key twice.
6. Press the TUNING key to select a blank.
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Wa Voie
7. Press the DIGIT key or press the CHARACTER key.

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CONTROLS AND INDICATORS
Listening to a preset station
. Press the preset function key to select “1-10” or
“11-20”.
. Press a numeric key under which memory has been
preset.
. Adjust the VOLUME control to the required listening
level and use the graphic equalizer control to adjust the
sound to your own preference.
Listening to record playing
. Press the PHONO key of the INPUT SELECTOR
switches.
. Operate the turntable to play back a record.
. Adjust the VOLUME control to the required listening
fevel and use the graphic equalizer control to adjust the
sound to your own preference.
With a turntable that is connected to this unit with a
System Control cord, the convenient System Control
operations are available. For details on this, refer to
“System Control Operation’ on page 20.
Listening to the program source connected to
the CD or AUX jacks
. Press the CD or AUX key of the input selector switches.
. Operate the component connected to the CD or AUX
jacks.
. Adjust the VOLUME control to the required listening
level and use the graphic equalizer controls to adjust
the sound to your own preference.
With a CD-player that is connected to this unit with a-
System Control cord, the convenient System Contro
operations are available. For details on this, refer to
“System Control Operation’ on page 20.
@ Tape deck operation
1. Press the appropriate TAPE key of the input selector
switches (1 or 2) to select output from a tape deck
connected to the TAPE 1 or 2 jacks.
2. Operate the tape deck.
3. Adjust the VOLUME control to the required listening
level and use the graphic equalizer controls to adjust
the sound to your own preference.
@ With a tape deck (connected to the TAPE 1 jacks) that
is connected to this unit with a System Control cord.
the convenient System Control operations are available.
For details on this, refer to “System Control Operation”
on page 20.
Note: ——_—__————
When both key (TAPE-1 and TAPE-2) are pressed, TAPE-2 setting
has priority.
Recording
1. Press the appropriate key of the INPUT. SELECTOR
switches.
‘2. Set up your tape deck(s) for recording and set the
recording level with the controls on your tape deck(s).
3. Adjust listening level at the unit to suit your listening
preference.
Note: ———________ eee
When a tape deck is connected to this unit with a System Control
cord, all of the input selector switches are disabled during
recording and do not function until recording is finished. This will
prevent the recording from being interrupted.
Tape dubbing
Tape recordings may be duplicated (dubbed) easily using
two tape decks connected to the TAPE 1 and 2 jacks.
For example:
(TAPE 1 to 2):
1. Connect two tape decks to the TAPE 71 and TAPE 2
jacks
2. Press the TAPE 1 switch.
3. Play back the recorded tape and adjust the recording
levels before starting tape dubbing.
(TAPE 2 to 1):
1. Press the TAPE 2 switch.
2. Press a key except TAPE 1 of the INPUT SELECTOR
switches such as AUX.
3. Play back the recorded tape and adjust the eorcing
levels before starting tape dubbing.
4. Do not press the TAPE 1 switch during eerding with
tape deck 1.
Note: ———_———__——?SS
Adjust record levels on the deck that is making the eapy using that
deck’s operating controls.

KR-V77R
CONTROLS AND INDICATORS
@ VIDEO deck operation
Listening to video recorder audio sound
1. Press the appropriate VIDEO (1, 2) key of the INPUT
SELECTOR to select output from a video recorder
connected to the VIDEO (1, 2) jacks.
2. Operate the video recorder. :
3. Adjust the VOLUME controls for your preference.
4. When 4 video monitor is connected to the VIDEO
MONITOR OUT jack on the rear panel, the picture from
the recorder can also be monitored.
Dubbing between two VCRs
Video dubbing can be performed while listening to any
desired source.
With this set, through dubbing from to
is possible.
To operate, set the video deck to record-pause
mode and set the video deck to playback mode.
At the same time as the video deck starts to play,
the record-pause mode of the video deck is
released and recording starts.
Audio injection
During video dubbing. the sound from the VCR can be
replaced with the desired audio source without affecting
the picture.
At this. graphic equalizer can be applied to the recording
' audio source.
1. Press the AUDIO INJECTION switch so that the ‘“AU-
DIO INJECTION” display is illuminated.
2. Select the desired audio source for Audio injection with
the INPUT SELECTOR.
3. When equalizer compensation is required when record-
ing a desired audio source with audio injection ON,
press the EQ.REC key.
The indicator fights up.
Set the equalizer controls as desired.
. Operate each VCR for dubbing.
-$@@e
AUDIO INJECTION
display
Audio
source
used
for
Audio
injection
(when
TAPE
2
is
selected,
the
TAPE
2
source
is
prior
to
another.)
@ Graphic equalizer operation
Normal operation
1. Select the desired source.
2. Press the equalizer (EQ. ON) key to ON.
@ The ON indicator lights up in the display window.
3. Press the equalizer level control UP DOWN keys so that
the equalized sound is heard from the speakers as
desired.
Preset procedure
Use EQ PRESET key to store equalizer curves in memory
or to recall them. (Five different equalizer curves can be
stored.)
. Select the desired source.
. Press the equalizer (EQ. ON) key to ON.
. Set the your desired equalizer curve.
. Press the MEMORY (EQ) key.
. Press the desired EQ PRESET keys (M-A ~~ M-E) to store
the equalizer curve.
ahon-—
‘Preset operation
The preset memory of this unit is available in two types the
“PGM” memory in which the user-created desired sound
response can be preset, and the “SET” memory in which
the factory-preset sound equalizer curves are prepared.
Use them by referring to ‘Characteristics of the SET preset
memories”.
1. Select SET or PGM.
@ The previously selected equalizer curve of the preset
channel is displayed.
2. Select preset key
Characteristics of the “SET” preset memories
A: For solid and punchy sound.
B: For effective reproduction of the dynamic movie
sound.
C: For easy to listen background music.
: For musical sound reproduction in a sense of lively
For reproducing the vocal music realistically.
EQ REC switch
Press this switch, signals will allow equalized to. be
recorded on TAPE 1. If you wish to record non-equalized
signals with the equalizer switch in the ON position, turn
the equalizer recording switch to OFF. This will allow you
to hear the equalized signals while recording non-equalized
signals.
Note:
The equalized signal is not output at TAPE 2 REC jacks.

KR-V77F
CONTROLS AND INDICATORS
- @ Surround operation
. MATRIX SURROUND
Caution:
Before starting operation, be.sure to check the following
poings:
1. The SPEAKER IMPEDANCE SELECTOR on the rear
panel of this unit is set to the “LESS THAN 80”
position.
2. Each of the front-channel and rear-channel speaker
systems has an impedance of more than 80.
1. Set the SURROUND key to ON.
@ The MATRIX SURROUND indication which is marked
on the key lights.
o—— SURROUND ——————
MATRIX
SURROUND
2. Select the source which is desired to be expected for
surround sound effect, and play it.
3. Adjust the volume control and balance between the
front speakers and the rear speakers by controlling the
MAIN VOLUME control key.
Note: ——_———__——
1. When the SPEAKER IMPEDANCE SELECTOR on the rear
panel is set to the “MORE THAN 82” position, the SUR-
ROUND key does not function. ;
2. If speakers having an impedance of less than 8 ohms are
connected, overheating may occur and cause trouble to this
unit.

KR-V77R
10
m System Memory
The required playback condition can be stored in memory
for each music program (tape, compact disc, phonograph
record (disc) or broadcasting program), so that the same
volume level, the same balance (between front and rear
channels), and the same equalizer pattern, etc. can be
recalled at any time instantly.
Two types of settings can be stored in memory, and by
pressing the SYSTEM MEMORY (M-1 or M-2) key you can
recall the preset sound field condition instantly.
Stored contents:
The stored contents in the System Memory are as follows:
© input selector (CD, PHONO, TUNER, TAPE, VIDEO.
etc.)
Preset channel in the TUNER position
Audio injection
EQ. key setting (ON/DEFEAT)
EQ. REC key setting (ON/OFF)
Preset channel of the equalizer pattern
SURROUND setting (ON/OFF)
Front-channel volume level
Front-channel balance control setting
OO000000
How to preset the System Memory:
1. Set the playback conditions as required.
@ When selecting the tuner or equalizer, be sure to
designate the preset channel.
. Press the SYSTEM MEMORY key.
2
' @ The display shows “SYS M-” for about 5 seconds.
@
When “SYS M” is blinking in the display, the tuner or
equalizer pattern is not preset in memory.
After presetting the playback condition for each chan-
nel, press the MEMORY key again.
How to recall System Memory:
1. Press the M-1 or M-2 key.
@ The display shows “SYS M-1” or “SYS M-2” for about
1 second, and the settings of each section are changed
to the preset contents.
Readjust the setting of each section as required.
@ When PHONO is selected for the input selector. with
a system-controlled turntable connected, the turntable
will automatically start playing by recalling the System
Memory. Therefore, be sure to set the record on the
platter of the turntable before activating the System
Memory function.
@ In the same way, when a system-ccntrolled tape deck
or CD player is connected to this unit, the tape deck
or CD player can be started automatically by activating
this System Memory function.
S
Note: -
1. Do not set the volume controls to an excessively high volume
level..It may not only astonish the listener, but it may also
damage the speaker or amplifier. ;
2. If the contents of the preset. channel is changed after
designating the tuner or equalizer section channel for System
Memory, the contents of the System Memory channel will also
be changed.
CONTROLS AND INDICATORS
@ System control operation
Connection
Using the system control cord provided with the system
component models as below, make connections as shown
on page 7.
The foiiowing modeis are avaiiabie for the system
control operations.
Turntable: KD-77F, KD-67F or KD-47F
Cassette deck: KX-97CW, KX-77CW
KX-67W or KX-87CR
DP-87, DP-57, DP-47, DP-M107R,
DP-M97 or DP-M97R
CD player:
Note: ———___--_____----—>__—_———
Some models provide two or three system control jacks. However,
when used with this receiver, be sure to connect the system
control cord to the jack having a indication of @.
Operation
1. Automatic play operation
When starting play with the turntable, cassette deck or
CD player connected to the receiver, press the desired
INPUT SELECTOR switch on the receiver. The turnta-
ble, cassette deck or CD player will automatically enter
the play mode.
In the same way, pressing the Play key of the turntable,
cassette deck or CD player will automatically switch the
INPUT SELECTOR on the receiver to the equipment on
which the Play key is pressed.
2. Synchro recording
To record the sound from the turntable or CD player
onto the tape with the cassette deck, press the PLAY
(START) key of the turntable or CD player. The cassette
deck will start recording automatically. synchronized
with the turntable or CD player starting play. For more
details, refer to the instruction manual of the cassette
deck.
3. Remote control
When the remote control unit provided with this unit,
to which the turntable, cassette deck or CD PLAYER is
connected, is equipped with related control keys, the
related components can be controlled using these keys.
Note:
During recording with the cassette deck, the INPUT SELECT on
the receiver is fixed at the source from which the recording is
made, by the system control circuit. At this time. pressing any of
the INPUT SELECTOR keys does no function even when it is
pressed.

KR-V77F
CONTROLS AND INDICATORS
@ Operations
1. Connect the power plug of this unit to an AC outlet.
@ This main frame enters the power standby mode and
the POWER STANDBY indicator lights.
2. Press the POWER key of remote control unit or the
POWER switch of this unit.
This unit enters the power ON mode.
Operates with the keys of remote control unit.
e
3.
Note for remote control operation
After pressing one of operation keys, when the next operation
is required, press the next operation key firmly after approx.
1 second interval.
When the next operation key is pressed immediately after the
previous key, it may cause misoperation.
™@ Installing the battery on the remote control
unit
1. Remove the battery compartment cover.
2. Insert two size ““AA’ (R6) batteries confirming the
correct polarity and close the cover in its place.
Note:
The provided batteries are to be used for operation of the remote
control unit. and it may have shorter life. When the remote unit
becomes effective only for shorter distance on dose not effective
to operate, replace them with two new batteries.
@ Usable range of remote control unit
The usable range of the remote control unit may differ on
temperature, humidity or using conditions, however, it is
defined approximately as shown in the figure below:
For controlling audio
For controlling TV set
KMT-1026/KMT-2026S
11

R-V77R
12
CONTROLS AND INDICATORS |
‘Hi Control keys
This key does not function
with this unit.
KENWOOD
REMOTE CONTROL UNIT
RC-70
@ Equalizer preset keys (EQ)
The 5 “PGM" presets and the 5 “SET” presets—total of 10
equalizer preset patterns can be recalled sequentially.
(——
BR
——®
PGM
Bo
vrrreressteterseereee
PGM
E
OFF
Tae
EE
cosst
eer
eecceseenccncensseenenes
SET
B<
SETA
@ Surround key
This key is used to turn the surround system ON or OFF.
© 10-KEY
AUDIO:10-key direct operation is possible only for tuner
and CD player.
(For example: When °’7” is pressed while listening to
track No. 4 of CD player, the track No, is changed to
7.)
TV:10-key direct operation is possible only for TV. Use
buttons “0-9” in combination for direct channel selec-
tion regardless of any previous memory settings or
functions. Generally, key in channel numbers in two
digits for speedy operation. To key in lower channel
numbers from 2-9, key in “O”, then the channel number.
(For example, to tune in channel 9 directly, key in “0”,
then “9”, for channel 23, key in “2”, then “3”, etc.)
(U.S.A. only)
-@ Compact disc player (DP-87/DP-57/DP-47/DP-
M107R/DP-M97R/DP-MQ7) operation keys (CD)
Play/pause key (>/Il)
When this key is pressed with a compact disc loaded in
the compact disc player, the disc is played. (Same function
as the play key on the compact disc player.)
When this key is pressed during play, the player enters the
pause mode. To release pause mode, press it again.
Stop key (@)
Press to cancel al! operations. The pickup returns to the
beginning of the first tune and the player enters the standby
mode. (Same function as the stop key on the compact disc
player.)
Music skip key (>>)
Press to skip to the beginning of the next tune. The pickup
is advanced to the forward tunes by the number of times
it is pressed. (Same function as the music skip key on the
compact disc player.)
Music skip key (44)
Press to return to the beginning of the current tune.
Pressing it again returns the pickup to the beginning.
When the key is continuously pressed, the pickup returns
to the backward tunes by the number of times it is pressed.
(Same function as the music skip key on the compact disc
player.)
DISC select key
When a multiple CD player (DP-M107R, DP-M97R, DP-
M97)is connected, this key selects one of six CDs sequen-
tially in a cycle.
>[1 }-——>[2|
(DP-M107R only)
© Tuner operation keys (TUNER)
Direct
When this key is pressed, the unit is set to direct mode and
the frequency of the desired station can directly be input
using 10-key.
1 ~ 10/11 ~ 20 (A/B)
Each time this button is pressed, the preset station range
is changed.
P. SCAN
When this key is pressed, the preset station are automati-
cally received from A-1 for a specified time.
Band select keys (FM/AM)
Select the desired band for broadcast listening.
(Same function as the band selector on the. tuner)

CONTROLS AND INDICATORS
© Cassette deck operation keys (KX-97CW, KX-
_ 77 CW, KX-67W ..... TAPE A/B) (KX-87CR ..... TAPE
B only)
Stop key (@)
Press to stop tape running.
Rewind key (<4) ;
Press to fast-wind the tape to the left reel.
Fast-forward key (PP)
Press to fast-wind the tape to the right reel.
Reverse Play key (<)
Press to start playback in reverse direction. (Rear side playback)
Play key (P)
Press to start playback in forward direction. (Front side
playback)
Pause key (Il)
Press to stop play back or recording momentarily.
The function of the PAUSE key.
Record key (REC) (@)
Press to start recording.
@ Input selector keys
PHONO: To listen to a source from the turntable connect-
ed to the PHONO jacks, press this switch.
CD: To listen to a source from the CD player connected
to the CD jacks, press this switch.
TUNER: To listen to a source from the tuner connected
to the TUNER jacks, press this switch.
TAPE-1: To listen to a source from the tape deck connect-
ed to the TAPE 1 jacks, press this switch.
TAPE-2: To listen to a source of the tape deck, etc.,
connected to the TAPE 2 jacks, press this switch.
VIDEO 1: To listen to a source from the equipment
connected to the VIDEO 1 jacks, press this switch.
VIDEO 2: To listen to a source from video cassette
recorder connected to the VIDEO 2 jacks.
VIDEO 3/AUX: To listen to a source from the equipment
connected to the AUX jacks.
© POWER switch
Press to turn the power on for whole system.
AUDIO: Press to turn the stereo system ON. Press again
to turn the stereo system OFF.
TV (KMT-1026, KMT-2026S): Press to turn the TV ON.
Press again to turn the TV off.
© TV (KMT-1026, KMT-2026S) operation keys (TV
FUNCTION) (U.S.A. only)
Note: With the supplied remote control unit, only KMT-
1026, KMT-2026S (monitor TV) can be operated.
TV/VIDEO key |
Use this key to select the type of signal that the monitor
will receive: TV, VIDEO 1 or VIDEO 2.
RECALL key
Press the recall key and both the time and channel will be
displayed continuously. Press it again and they will disap-
pear. The timer function can be utilized as well but the time
will not continuously be displayed.
Channel tuning UP/DOWN keys (TV CH.) (A/V)
Press the channel up (A) key to tune in higher channels, and
the channel down (V) key to tune in lower channels. Press
the key continuously until the channel number you wish to
receive appears on the upper right side of the screen.
ANT/AUX key
Press this key to set the ANT and AUX indicator to agree
with the antenna input source.
a ee ce | ———~> VIDEO senda
Note: —-—__—
Switching between TV and VIDEO etc., described above is
not related to the function of this reciver should be effectuat-
ed or the TV set.
TIMER key
Press the timer key to set desired time.
TV VOL. keys (UPA/DOWNY)
Apply steady pressure to the VOLUME UP or DOWN
buttons, to increase or decrease the volume as desired.
@ REAR VOL. keys (UPA/DOWNV)
Apply steady pressure to the REAR VOLUME UP or DOWN
key to increase or decrease the volume as desired.
@ Volume contro! keys (MAIN VOL.) (UPA/DOWNV)
Controls the volume of the speakers and headphones.
Press the UP (A) key to increase the volume level and, press
the DOWN (V) key to decrease it.
Muting key (MUTE)
Press to decrease the volume level instantaneously.
Pressing it again resumes the previous volume level.
When this key is pressed, volume level is decreased. The
MUTING indicator blinks.
@® Turntable operation keys (PHONO)
Play key (<)
Press to start record play automatically.
For KD-67F, select the record size, before starting play with
this key.
Stop key (Mm) ;
Press to stop play: the tonearm returns to the rest and th
platter stops rotating.
KR-V77F
13

3.
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the
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KR-V77R
16
CIRCUIT DESCRIPTION
Description of Companents
TUNER UNIT (X05-353X-XX) 0-10: K,P 0-81: U, UE
Use/Function Operation/Condition/Compatibility
FM IF amp.
LPF (Low Pass Filter)
Emphasis select
75us when ON, 50us when OFF.
Q7 : FM +B {ON in FM mode), O8 : AM +B (ON in AM mode).
+B power supply select
IC1 (LA1265) FM 1F/AM detection
§C2 (LM7001) PLL (Phase Locked Loop)
1C3 (AN7470) MPX (Multiplexer)
POWER AMPLIFIER UNIT (X07-2360- 12)
Use/Function Operation/Condition/Compatibility
Forma
____|
Primary
ste
voltage
amp
ee
ae
ee
[as~s
|
Smondaryems
veneers.
|
rap.
10
|
Secondary
stage
currant
mir
id
Rone
lpia
=
oles
-_—
=)
erecion
emomeseain
|
pee
ee
ee
ee ee
ee
ne
Q18, 19 Protection current detection
AUDIO UNIT (X09-265X-XX) 0-11: K,U, UE 1-02: P
Operation /Condition/ Compatibility
ou! For MUTE.
Q3,4 :
[Mutigg
For
mu
renal
ee
Se
ee
08,
70
[Forbiescompensation
——SC*~=“*‘“dRCSSC“‘“‘CNSNC#CSC‘“‘CSNSCN#C“C(NNNNNNC
Turns
ON
when
the
49/80
switch
i
aet
C0 BM,
to turn
O24
ON.
‘sonar
Q25
Turns ON when Q21 is ON or Q23 is ON, to turn O25 OFF
Compatible with 2SC1740S. °
Q26
Transistor switch
Drives O26 to turn the output relay and the surround output
relay ON and OFF.
Driver transistor for the output relay and the surround output
relay.
Transistor switch
Relay drive transistor
For the —12V power supply.
For the —30V power supply.
Turns
ON
immediately
after
power
ON,
and
when
power
is
OFF,
to turn the — 30V OFF.
Turns Q1 and Q2 ON/OFF. Compatible with 2SA9338.
Turns 03, 04 and Q11 ON/OFF. Compatible with 2SA933S.
027 ~ 29 Constant voltage circuit
Constant voltage circuit
—30V ON/OFF switch
Muting driver
Muting driver
Video buffer for REC OUT
Video buffer for MONITOR OUT
Turns ON when surround mode is engaged to turn Q11 OFF.
Compatible with 2SC1740S.
Turns ON when surround mode is engaged.
Turns ON when VIDEO 1 is selected to select IC4.
Turns ON when VIDEO 2 is selected to select 1C4.
Turns ON when MUTE 1 is at a high level, or when forced
MONDO is selected. Compatible with 28C1740S.
Cuts the CLK line except when the CLK for the tuner is at a high
level.
Cuts the DATA line except when the CLK for the tuner is at a
high level.
| For Tuner unit (X05-}. ;
Surround ON/OFF switch
Surround lamp driver
Switch for VIDEO 1
Switch for VIDEO 2
MONO/ST select switch
Muting for the CLK
Muting for DATA
Ripple filter

CIRCUIT DESCRIPTION
Operation/Condition/Compatibility
Use/Function
IC1 (NJM4558D- A)
Equalizer amp.
SOURCE select, TAPE 2 select, GE (Graphic Equalizer) ON/OFF
select.
GE REC select, Al (Audio Injection) select.
VIDEO 1/2 select.
Compatible with M5218P.
1C6
(TC9176P)
Electronic
VR
;
Front speaker volume.
1C7 (NJM4558D- A) Buffer amp. for the electronic VR Compatible with NJM4560D.
1C8
(TC9176P)
Electronic
VR
For
the
surround
amp.,
for
the
spectrum
analyzer
level.
1C9
(NJM4558D)
Buffer
amp.
for
the
electronic
VR
Compatible
with
M5278P.
1C10
(uPC7812HF)
Constant
voltage
power
supply
3-pin
regulator
for
the
+12V
constant
voltage
power
supply.
DISPLAY UNIT (X14-232X-XX) 0-11: K,P 0-82: U, UE
A a
faa SSSS*d Pi currentbofer
foo,i0 «dt SV power supply
forr~
ia
|
Relay
ever
citeue
IC2 (TC9164N) Selector
Selector
IC3 (TC9162N)
1C4 (LC4966)
1C5 (NJM4558D)
Selector ;
Buffer amp. for VIDEO 1 and REC OUT
(C1 (uP 7SIOBOW-200)
(C2 (uPD63900) | Statedrier —SSCSCSCSCSC~S*i Ps CS
1C3 (LC7565) Spectrum analyzer display driver FIP driver.
1C4
~
7
(uPA80C)
FIP
driver
(Negative
logic).
1C10
(uPD4081BC)
Data
mute
|
Data
transfer
select
for
the
VOL
IC
and
SW
IC.
(cia
@eraec)
fRewtic
O
Operation/Condition/Compatibility
Semiconductor inductor x 7.
EQUALIZER UNIT (X85-1120- 10)
Use/ Function
Electronic VR array for the graphic equalizer
Op-amp. for the graphic equalizer
Component
ICi (LC7522)
1C2, 3 (M5229P)
17

CIRCUIT DESCRIPTION
Microprocessor
Eee
1C1)
yuPD75108CW-170 or -200 (X14-2320-11
Terminal connection
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ZOHLd
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LLNI/LLd
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SLNI/ELd
uPD75108CW-
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3103
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31
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CIRCUIT DESCRIPTION
®@ Version /Model Set up
Setup of the version of the model for each area is per-
formed by the initial setup diode matrix.
Set to ‘1’ when diode is provided, or ’’0’’ when not pro-
vided.
1) Version setup switch
Version
set
up
switch
Receiving
frequency
range
|
Channel
spacing
|
Reference
frequency
87.5 ~ 108.0MHz 100kHz
530 ~ 1610kHz 1OkHz
2) Model setup switch (TYP1, TYP2)
Model setup switch Function
Dolby surround | Speaker matrix | Spectrum amalyzer display (SP!)
O : Available, X': Not available
TAPE 2 | TAPE 2
AUX PHONO TUNER OFF ON
AUDIO
INJECTION
EQ REC
ON OFF
Open whenA.].is turned OFF.
INJECTION
Open when TAPE 1
is turned ON.
® Static Driver IC : u~PD6300C CLK (12), DATA (11), LH (10)
01 (16) 02 (17). | 03 (18)
Output
VIDEO 1 —T
“ oo pe |e
EQ EQ
OFF ON
O5 (20)
Display 11-20 1-10
AUTO DEFEAT |
$2 (25)
O11 (26) 012 (27) | 013 (1)
AUDIO VIDEO | VIDEO
INJECTION
$6 (31) $7 (34)
015 (3)
$1 (24) $3 (26)
010 (25)
Display
ON
SURROUND
Terminal | S14 (42) $15 (43) $17 (45) | S18 (46)
LAMP.
Positive logic is used.
@ PLLIC:LM7001 CLK (2), DATA (4), CE (3) @ Equalizer iC : LC7522
FM
AM
Except TUNER 0 : Short, 1: Open
S (13) : VEE, CLK (17), DATA (16)
17 = 60Hz, f1 = 15kHz
@ EQ./SPI display IC : LC7565
“$1 (15), S2 (16) : VDD, CLK (18), DATA (17)
© Volume IC : TC9176P CLK (8), DATA (9), ST (10)
The
FRONT
volume
control
uses
the
same
IC
with
reversed
L/R channel connections.
The
R-channel
of
the
rear
volume
contro!
is
also
used
to
control
the
Surround’
{rear-channel)
speaker,
while
the
L-channel
is
used
to
control
the
SPI
(Spectrum
Peak
Indicator)
level.
£7 = 60Hz, f1 = 15kHz
19

R-V77R
20
® Terminal functions
CIRCUIT DESCRIPTION
[PinNo. | Pinname | 1/0 |
: Backup detection pin.
: PIS/INTS | ce When this goes low level, backup mode is set and the clock stops.
Station presence/absence detection signal input pin :
P12/INT2 j sD Used in Auto Tuning and Preset Scan.
High : Station is not present, Low : Station is present.
PII/INT2 Power Key Key ON when high level at power key input terminal.
Bemocdn Remote contro! signal input pin after detection : Inputs the remote control signal level
4 P10/INTO I . in normal mode and when reading out the leader code, Detects the signal by interruption
Signal ae :
the rising edge when reading the data.
5~8 PTHO3 ~ | Key Key matrix return signal inout : Normally high.
PTHOO Input (Threshold voltage = VDD x 7.5/16, Conversion time : 32.3ys.)
TIO, TH I Not used No-connection input pin. Fixed at VDD or VSS.
11 P23 2 Le7ee Output pin to be connected to the CLK pin of LC7565. Normally low.
(CMOS) CLK ; :
12 P22/PCL (@) Static Driver LH signa] output pin for the Static Driver 1C (uPD6300C).
(CMOS) (uPD6300C) Normally low, and high when data is output.
CLK signal output pin for zPD6300C, TC9162N, TC9164N, TC9176P and LM7001.
TC9176P, TC9162N and TC9164N are not directly connected to the CLK pin of each IC.
13 P21/PTO1 o CLK For TC9176P, the VOL IC DATA MUTE signal ANDed with the signal from the CLK pin
(CMOS) are input to the IC. For TC9162N and TC9164N the switch IC DATA MUTE signal
ANDed with the signal from the CLK pin are input to the IC.
DATA signal output pin for zPD6300C, TC9162N, TC9164N, TC9176P and LM7001,
14 P20/PTOO ee DATA tn the same way as the CLK signal, each DATA MUTE signal is ANDed with this signal
and input to the IC for TC9176P, TC9162N and TC9164N.
15 ~ 18 PO3/S! ~ | Key Key matrix returns signal input pin :
POO/INT4 Normally high.
Input
PLLIC
(LM7001) CE
CE signal output pin for the PLL IC (LM7001).
Normally low, and high when data is output.
Strobe signal for the diode switch intake.
Goes low momentarily immediately after Preset, after then it is always high.
ST signal output pin for the switch ICs (TC9162N. and TC9164N).
Normally low, and high when data is output in a monent.
The microprocessor signal is input to the ST pin after differentiating.
With the volume level of the front channel set to between 0 and —28dB, outputs the
muting signal for a short period (about 10msec.) when the TAPE 2 ON/OFF, EQ ON/
OFF, EQ REC ON/OFF, surround ON/OFF, AUDIO INJECTION ON/OFF or input
When the volume fevel of the front channel! is set to — co dB, outputs the muting signal.
ST signal output pin of the Front IC for Vol. IC TC9176P.
Normally low : Goes high momentarily when data is output. High when power is OFF.
ST signal output pin of the Rear tC for Vol. |C TC9176P.
Normally low : Goes high monentarily when data is output. High when power is OFF.
Output pin for the signal which makes the DATA or CLK signa! output from P21 and
P20, so that the other 1C does not input to the switch IC. :
This signal ANDed with the signal from P21, P20 are input to the Switch IC.
DATA signal input pin of EQ IC LC7522.
Diode Switch
a ee ) Intake Signal
drain
ek Switch IC
21 P4121 Gahan (TC9162N,
es TC9164N) ST
\drain
oO
22 P120 a MUTE2
i i selector is switched.
drain
ie)
N ch VOL IC ST
oe pee ( cen (FRONT)
drain
O
N ch VOL IC ST
ca pee open (REAR)
drain
oO
N ch Switch IC
ao 5 Fist open DATA MUTE
drain High when power is OFF.
ie)
Nch\ | EQ IC (LC7522)
a ee (con DATA High when power is OFF.
drain .
em