Kenwood KR-V86R User manual

ste AUDIO-VIDEO STEREO RECEIVER v @ ap ;
SERVICE MANUAL
‘©1987-7 PRINTED IN JAPAN
B51-3232-00(O) 2238
Knob Front glass* Panei* Metallic cabinet Knob
(K29-2333-04) (B10-) {A20-) {A01-11546-01) (K29-2671-04)
Phone jack Knob Dressing plate
(E11-0162-05) (K29-2668-04) x3 {BO3-2280-04)
Knob (Button) Foot Knob Remote controller ass’y *
(K27-1644-04) x2 (JO2-0126-05) x4 (K29-2667-03) (A70-)
Electric circuit module” AC outlet* Lock terminal board (8P)
(W02-0741-15) (E03-) (E20-0823-05)
Screw terminal board (2P)*
Phono jack Slide switch *
(E20-) (E13-0291-05) x3 (S31-2083-05)
Binding
post
Phono
jack
(4P)
Miniature
phono
jack*
AC
power
cord*
(NO8-0128-35) (E13-0446-05) ({E11-0165-05) (E30-)
Phono jack (2P) Phono jack (8P) Slide switch Power cord bushing
{E13-0235-05) ({E13-0819-05) x2 (S31-2113-05) (J42-0083-05)
* Refer to parts list on page 47.
98h

KR-V86R
CONTENTS/DISASSEMBLY FOR REPAIR
DISASSEMBLY FOR REPAIR ................. 2
BLOCK LEVEL DIAGRAM ..................-. 4
CONTROLS AND INDICATORS ............... 5
CIRCUIT DESCRIPTION
Description of components. ......-...02+e00es 9
Microprocessor : uPD75108CW-041
(X14-2130-12 ICI). eee eee 11
Indicator tube : FLP2OAMW30
(X14-2130-12:FL1) .. 2... ee ee ee ee eee 15
Test MOd@ 6 os eels vee wie Pa ee Dee ae ae AG
Initialization ©... ee ees 16
Selector tuner 2... ee ee ee eee 17
(Remove the metallic cabinet before performing the follow-
ing operations.)
1. Remove the 9 screws retaining the front panel to the
sub panel ( @P).
2. Remove the screw on the panel escutcheon, and
disengage the 5 claws retaining the panel escutcheon to
the sub panel ( @).
3. Place the panel escutcheon on the unit ( 3 ] ). At this
time, place a cloth, etc., below the panel escutcheon to
protect the panel escutcheon from being scratched.
ADJUSTMENT
..........
0.0.00
00
cee
eee
20
REGLAGE®
3)
ie.)
eeu
ce
i
Oe
Bo
en
See
ek
21
ABGLEICH
cso
acy
Wile
a
ee
ete
eed
22
ADJUSTMENT/REGLAGE/ABGLEICH..........
23
VOLTAGE
CHECK
TABLE
...................
24
PC
BOARD
(COMPONENT
SIDE
VIEW)
.........
25
PC
BOARD
(FOIL
SIDE
VIEW)
...............
29
CIRCUIT
DIAGRAM
...................04.
36
EXPLODED
VIEW
...................
00008.
45
PARTS
LIST
oeicnun
Seatac
aod
Shey
sia
ORL
aa
47
SPECIFICATIONS
................
BACK
COVER

10.
11.
DISASSEMBLY FOR REPAIR
Disengage the 6 claws retaining the Display Unit (X14-
2130-12) (C/6) to the panel escutcheon ( 4] }:
Remove the 3 screws retaining the Display Unit (X14-)
(A/6) to the panel escutcheon ( @ ).
Disengage the 4 claws retaining the Display Unit (X14-)
(A/6) to the panel escutcheon ( 6) ).
Disconnect the connector (CN1-A,B) which have been
connected to the Display Unit (X14-) (A/6) and (X14-)
(B/6) ( @).
Place the Display Unit (X14-) (A/6) in the direction
of the arrow ( @).
Remove the 4 screws retaining the Display Unit (X14-)
(B/6) to the panel escutcheon ( (9) ).
Disengage the 8 claws retaining the Display Unit (X14-)
(B/6) to the panel escutcheon. To facilitate this proce-
dure, disengare the claws from right ( ® ) to left
(®).
Remove the Display Unit (X14-) (B/6) in the direction
of the arrow ( @ ).
mwisloln

KR-V86R
BLOCK LEVEL DIAGRAM
YAZATVN'
Vv
WNYLOAdS
Yala
Ww YSaMOd
dS
LNOYWS
vO
dd9
L£L—-bb9l
AL
GS
(1NO¥4)
“dW YAaMOd
€
3inWw
otol
AWOOT
Ca
wo
,
2
|
NOLLOZFNI
|
o1anv
oauY z O30IAN
aoe
5
=
Uoasann
|
oranv
ae
O
934
te
EA
all
4
O3GIA
i
.
~~
e
_
AWOOZ
©)
€
OJGIA
Oz
OACIA
©
1
o3dla
O
Avid
AWO0e
l |
[
no0z
|
1
adv
Eso]
Oo
l
7
=
ws
O
AW
1d
Z
advVL
ON
WY
r O NI ALVS
uf
Q
LNO
ALYO
i
Seth
ONiw4s
aedAy

KR-V86R
CONTROLS AND INDICATORS
KENWOOD aunio-vingo sTeREO RECEIVER
@ POWER switch
Press this switch to turn on power. (The POWER STAND
BY indicator lights.) 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: ———_——_-_-[—SS
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.
Upto 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.
Pe SSeS siozist=
peeeese=e
== ——
= cori cineca os
cee E alt
a as a
Li, le ae LVI
sevect
Pe
|
oer
owe
cme
LV}
cuanacten
CHENGRT]
=e
| Lael
© Equalizer level controls
Adjust these controls up and down to equalize the sound
by +12 dB to the center frequency indicated.
@ EQUALIZER 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 af the graphic equalizer.
© EQ PRESENCE controls
Adjust these controls (INCREASE and DECREASE) to boost
or attenuate the equalizer curve indicated.
© PGM/SET key
Pressing this key alternates the preset equalizer curves to
be recalled between PGM (user-programmed patterns) and
SET (factory-preset patterns) groups.
@ 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.

KR-V86R
CONTROLS AND INDICATORS
@ THROUGH DUBBING [2] > [1] key
This activate the through dubbing from VIDEO 2 to VIDEO
Te
@ THROUGH DUBBING [3] > [1] key
This activate the through dubbing from VIDEO 3 to VIDEO
1.
Note: ——___________-—-______—_——_.
Pressing the THROUGH DUBBING key twice will resume the
previous mode.
@® Input selector switches
VIDEO 1 — Selects the video recorders connected to the
VIDEO 1 jacks.
VIDEO 2 - Select the video recorders connected to the
VIDEO 2 jacks.
VIDEO 3 - Select the video recorders connected to the
VIDEO 3 jacks.
TAPE 1 — Press this switch to play back a tape deck
connected to TAPE 1 jacks.
TAPE 2 - 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.)
TUNER - Selects the tuner mode.
CD/AUX - Selects the source connected to the CD/AUX
jacks.
PHONO - Selects the program source played on the
turntable.
@ AUDIO INJECTION switch
Press this switch ON when replacing the sound of VIDEO
1, 2 with that of AUDIO source. or when the sound
equalized by graphic equalizer is required on dubbing
between VIDEO sources.
@ CATV ON/OFF switch
Press this switch to select FM 759 or CATV 7529 antenna
line.
@ 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.
@ REMOTE SENSOR
Point the supplied remote control unit towards this sensor
and operate. It blinks when the signal from the remote
control unit is received.
@ 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.
@ BALANCE controls
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.
@ VOLUME controls
This control adjusts the left- and right-channel volumes
simultaneously. Set it for the desired listening level.
Pressing the up (A) key increases the volume and pressing
the down (V) key decreases it.
Note: ———--—_£. TT _iiuc——
A slight noise is heard from the speakers when operating the
VOLUME controls. This noise is the built-in microprocessor control
signal and is not a fault.
@ Preset (numeric) keys
Use these keys to:
1) input directly the digits of frequencies, or
2) store and recall frequencies in the preset memory.
@ DIRECT key
Used to tune to the station directly. Input the desired
frequency numerics with the numeric keys after pressing
the DIRECT key.

KR-V86R
CONTROLS AND INDICATORS
@ 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 key
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.
@ BAND selector switches
FM - For FM broadcasts.
AM - For AM broadcasts.
@ DIGIT SELECT 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 MODE key
Press this key to activate the station name input mode.
@ MEMORY key
When the input mode is tuner mode, use this button to
store new broudcast station data in the preset channel
memory. By pressing the MEMORY key, setting the preset
function key to 1-10 or 11-20 and by pressing one of the
PRESET 10 key, the frequency being received is stored in
the memory in the preset 10 key pressed.
€@ MUSIC SELECT key
Pressing this key alternates between the Music Select
mode and the Preset indicator mode.
@ MUSIC genre key
In the Preset indicator mode, a desired music genre can
be stored into each Preset Channel memory button. In the
Music select mode, this key is also used to select the music
genre.
@ CLEAR key
Used to clear the contents stored in the preset channel
memory. After recalling the preset channel to be cleared,
pressing this key will clear the memorized contents.
@ Preset function (1-10/11-20) key
Used to select 1-10 or 11-20 setting for the preset channel
key. 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 “11-20”
setting is used.
@ SEEK LEVEL select key (During FM reception only)
Used to select the stop level. When ‘’L” is selected, the
Auto Stop and Auto Memory functions are possible even
for the weak-signal stations. When ‘‘H” is selected, the
Auto Stop/Auto Memory functions are performed only for
the stations having strong signal. Pressing this key alter-
nates between “L” and “H”.
@ AUTO MEMORY key
When this key is pressed ON, the station frequencies will
be scanned and stored into the Preset Channels automati-
cally. Scanning operation is performed from the displayed
frequency to the higher range and finished after one cycle
is Over with the receiving band. During Auto Memory
operation, the Memory indicator blinks. To release it. press
the AUTO MEMORY key again.
@ 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...... Vite U2 sec 20,)
When frequencies other than those stored in the preset
memory received, pressing this key changes the reception
to the frequency in preset channel 1.
@ Tostop ascanning operation, press the SCAN key again.
@ In MUSIC SELECT mode, a preset scanning operation
is performed within the music genre selected.

KR-V86R
CONTROLS AND INDICATORS
@ Display window
Colca vIpEo
AUDIO INJECTION
:
°
@ Display the power level display.
@® 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.
@ This indicator lights when the Memory (EQ) key is
pressed to store the desired equalizer curve.
® Equalizer Presence Indicator.
© Lights when the EQUALIZER switch is set to “ON”.
Lights when the EQUALIZER switch is set to “DEFEAT”.
@) This indicator lights when EQ REC (equalizer recording)
is engaged for Tape 1.
@ Lights when the CATV switch is pressed.
@ This displays the ‘’L” or “H” seek level in FM mode.
@ This displays the input mode, preset channel, station
name. front volume level, rear level balance, surround
mode, EQ preset channel and music genre.
@ Lights when the MEMORY key is pressed.
Blinks when the AUTO MEMORY key is pressed.
Displays preset music genre selected at music select
mode, and all of the preset broadcast station channels
which are in the Preset indicator at preset indicator
mode.
VOLUME LEVEL
y y..
STEREO TUNED
@ Indicates the left and right volume balance.
@® Displays the volume level.
@ Flashes when the MUTING key is pressed.
When the Music Select key and MUSIC GENRE key are
pressed, the “MUSIC SELECT” and one of the music
genre indicators light.
@ “1-10"or “11-20” lights according to the selection of
the preset function keys.
@) In tuner mode, lights when a station is tuned in.
@ In tuner mode, lights when a stereo broadcast is tuned
in.
@ Displays the digital frequency display.
Lights during auto tuning.
@ Displays the tuner band “FM” or “AM”.
@ Lights when the TAPE-2 key is pressed.
@) Display the VIDEO dubbing mode, VIDEO monitor out
mode, EQ REC mode or through dubbing mode
displays.
@ Lights when the AUDIO INJECTION is pressed.
@) Lights when the PGM/SET key is set to “PGM”.
@ Lights when the PGM/SET key is set to “SET”.

KR-V86R
CIRCUIT DESCRIPTION
Description of components
TUNER UNIT (X05-3330-12)
Pict fFwiFdemor CCS
\C2__| PLL (phase-lockedioopi ___—+|SSSCSCSCSCSCSSCSSS
a
IC4 FM MPX
7
Q5 FM + B select Turns ON in FM mode.
Q6 AM +B select Turns ON in AM mode.
Q7 FM + B select Turns ON in FM mode.
Q8 TUNED indicator, for SD Turns OFF when tuned.
ag Forced mono select Turns OFF in forced mono mode.
TUNED indicator, for SD Turns ON when tuned.
Forced mono select Turns ON in forced mono mode.
CATV relay drive Turns ON in CATV mode.
Q14, 15 Seek level select Q15 is ON and Q14 is OFF when low.
Q16 Buffer for LS
+ B ripple filter
Microcomputer (4-COM) power supply,
20 for fast OFF
MAIN AMPLIFIER UNIT (X07-2350- 12)
Component Use/ Function Operation/Condition/Compatibility
Ic1 Protection Relay drive.
ai=4 | Prmarystgevelapaniieetien |
| ara~16 | Third stops vottoge amplification | _________—S
aai~24 | Power amplifier drive |
Q27, 28 Protection, current detection Negative (—) side.
Q29 Transmits the current detected signal to 1C1.

10
AUDIO UNIT
IC4
1C5
IC6
:
’
(X09-2470- 12)
Use/ Function
Phono equalizer
1C2,3 Input selector select
GE, GE REC ON/OFF,
surround mode select
Buffer for REC
CIRCUIT DESCRIPTION
Operation/Condition/Compatibility
ai
| ice. VR array for GE (graphic equalizer)
1C7,8 Op amplifier for GE (graphic equalizer)
Semiconductor L (self-reactance) x 7.
For front channel.
Muting when changing the selector.
Q9 and Q10 are driven by open collector.
Emitter follower.
Muting for MAIN IN section.
Switch for —33V, high-8 (beta) transistor.
Inverted-darlington connection with Q32.
Error amplification.
1C10 Electronic volume
C12 3-pin regulator 15V.
Muting
Q11
Q13, 14 Land R mixer for apectrum analyzer
Q17,18 Muting
Q19, 20 Drive circuit for muting
Q25 Constant voitage for —33V
Q27 For FL ON (go on) timing
Q28
Q29 For FL OFF (go out) on power OFF
Q30 For —14V constant voltage
Q31 —14V constant voltage
Q32 —14V constant voltage
Q33 5V constant voltage
Q34 5V constant voltage
Q37, 38 For main amplifier bias
DISPLAY UNIT (X14-2130- 12)
Q39~42 Main amplifier final stage
5V power supply for display.
5V power supply for u-COM (microcomputer).
Component Use/ Function Operation/Condition/Compatibility
{C1
1C8,9
1C10, 11
IC12, 13
1C14~17 (2/2)
1017 (1/2)
Mierocomputer ee ee
Transistor array (for FL drive)
Active low.
GE, SP display IC
Logic IC
Static driver (for FL drive)
Transistor array (for FL drive)
Active high.
Data mute circuit.
Analog switch IC
Spectrum analyzer band-pass filter
Spectrum analyzer band-pass filter
Qi~4
Q7
Q8~10
Qi1
Digital transistor (for FL drive)
Video select.
| an
Input amplifier.
ea
For through-dubbing control
Turns OFF when a through-dubbing operation is activated in VIDEO 2
and VIDEO 3 mode.
Data mute circuit
Video output buffer
Q12, 13
a14
Realy drive
Microcomputer reset circuit
ania
Turns ON for several milli-seconds, when power is turned ON.

KR-V86R
CIRCUIT DESCRIPTION
Microprocessor : .PD75108CW-041 (X14-2130- 12 : IC1)
*1:K,P,U & UE types only.
*2: E type only.
Terminal connection
PIZ/INTS
PA2ANT2
PIV/INTT
PIOHNTO
PTHO3
PTHO2
PTHO1
PTHOO
5D
Volume Speed H/L
Remocon Signal
Key Input
Key Input
Key input
Key Input
MUTE1
LC7565 CLK
MUTE3
Initial Switch
P21/PTO1
P20/PTOO
PO3/SI
PO2/SO
POI/SCK
POO/INTS
Key Input
Key input
Key Input
Key Input
Volume IC (CX7978) ST
Switch IC {TC9162, 63, 64) ST
PLL IC (LM7001) CE
Static Driver (4PD6300C) LH
EQ. IC (LC7522) ST
ALL IC CLK
ALL IC DATA
Remocon Received LED
; EQ.
ON/
: DEFEAT
La ; ; / 400Hz 400Hz ;
: : — DOWN i UP ;
(a3) @ . . & e o: oat
4
ANCE
ANCE
L R
L\ Ls £\ L\ L\ Ly Ly
MUSIC SPEC- TYP! TYP2 TEST JBANO
TRUM
YES NO: YES NO} NO YES} NO YE!
i?) Q 1 0 1 C1)
PO2 PHTOO
(16) (8)
© Volume IC CX7978 @ PLL IC LM7001
CLK (9), DATA (10), ST (11) CLK (2), DATA (4), ST (3)
CS1 (4) CS2 {5) M/S (6)
Vss Vss OPEN or VDL
REAR | OPEN or VOL | OPEN or VDL | OPEN or VDL
The ST signal to the IC is input by differentiating the signal
from the microcomputer.
@ Switch IC CLK (15), DATA (16), ST (13)
$1 Ss? $8
TC9162N EQ REC EQ REC EQ ON THEATER STADIUM _ | _
VIDEO 2 VIDEO 3 AUDIO
TC9163N 2-1 3-1 INJECTION 1 VIDEO 1 VIDEO 2 VIDEO 3
(V1 REC} (V1 REC) {V1 REC)
To FL.
al d| al al al al ai 8 Sl
POWER
Serial BUSY
Serial OATA
x
[kr-vi2eR| 1 | 0 |
[kr.viogR | 0 | 1 _|
[krvesr | o | 0 |
1: Diode used
0: Diode not used
VIDEO 1 VIDEO 3
(V2 REC) (V2 REC)
AUDIO
TC9164N TAPE 1 CD/AUX PHONO TAPE 2 PLAY | TAPE 2 PLAY | INJECTION 2
(V2 REC)
The ST signal to the IC is input differentiating the signal from the microcomputer.
© Static Driver {C uPD6300C CLK (12), DATA (71), LH (10)
[ Output | 00 (15) 02 (17) o3(18) | oaig) | 05120) 06 (21) 07 (22) 08 (23) 09 (24)
mn EEK
PDS PO2 POI PCé
13 (1)
010 (25) 011 (26) | 012(27) 014 (2) 015 (3) 016 (4) 017 (5) 018 (6) 019 (7)
AUDIO
INJECTION M
Terminal PC4 PC1 PC3. PC5
Dispaly EQON |SURROUND! TAPE2 ‘ =)
@ Equalizer IC LC7522 S (13): VEE, CLK (17), DATA (16) 11
© EQ./SPI dispaly IC LC7565 $1 (15), S2 (16) : VoD, CLK (18), DATA (17)

KR-V86R
CIRCUIT DESCRIPTION
Terminal functions
V0 Name
= Backup detection pin.
:
PASANTS
ce
When
this
goes
low
level,
backup
mode
is
set
and
the
clock
stops.
Description
Station presence/absence detection signal input pin:
Used in Auto Tuning, Auto Memory, and Preset Scan.
High : station is not present, Low : Station is present.
PI2/AINT2
Volume
data
output
inhibition
time
setting
port
:
Used
when
electronic
volume
CX7978
Volume
Speed
malfunctions
at
low
temperature.
High
:
400ms,
Low
:
96ms.
* This is used when low in the KR-V126R.
Remote
control
signal
input
pin
after
detection
:
Inputs
the
remote
control
signal
level
in
normal
mode
and
when
reading
out
the
leader
code.
Detects
the
signal
by
interruption
the rising edge when reading the data.
PII/INT1
Remocon
Signal
PIO/INTO
Key matrix return signal input pin : Normally high.
(Threshold voltage = VDD x 7.5/16, Conversion time : 32.3us).
Not used No-connection input pin. Fixed at VDD or Vss.
Muting
signal
output
pin
:
Used
when
the
Input
Selector
is
changed,
during
tuning
scan,
P23 etc. Normally low, Active high.
MUTE1
(CMOS)
P22/PCL
Output
pin
to
be
connected
to
the
CLK
pin
of
LC7565.
Normally
low.
(CMOS)
@
With
the
volume
level
of
the
front
channel
set
to
between
0
and
—28dB,
outputs
the
13
P21/PTO!
oO
MUTE3
muting
signal
for
a
short
period
(about
10msec.)
when
the
TAPE2
ON/OFF,
EQ
ON/
(CMOS)
OFF,
EQ
REC
ON/OFF,
surround
ON/OFF
or
surround
mode
selector
is
switched.
@
When
the
volume
level
of
the
front
channel!
is
set
to
—
aB,
outputs
the
muting
signal.
14
P20/PTOO
ie)
Initial
Strobe
signal
for
taking
in
the
initial
switch.
(CMOS)
SW
Momentarily
low
immediately
after
reset,
otherwise
always
high.
PO3/SI~
Key
Key
matrix
returns
signal
input
pin
:
15~18 I
POO/INT4 Normally high. ;
© ST signal output pin for the electronic volume IC (CX7978) .
@ Normally high, and tow when data is output.
@
The
microprocessor
signal
is
input
to
the
ST
pin
of
CX7978
after
differentiating.
Nch Volume IC
(CX7978)ST
P123
Switch IC
N ch (TC9162N,
9163N,
9164N)ST
©
ST
signal
output
pin
for
the
switch
ICs
(TC9162N,
TC9163N.
amd
TC9164N).
@
Normaily
high,
and
}ow
when
data
is
output.
@
The
microprocessor
signa!
is
input
to
the
ST pin
after
differentiating.
PLLIC
(LM7001)CE
@ CE signal output pin for the PLL IC {LM7001) .
@ Normally tow, and high when data is output.
@ LH signal output pin for the Static Driver IC (uPD6300C) .
@ Normally tow, and high when data is output.
Static Driver
open (uPD6300C) LH
©
The
signal
pin
used
to
mute
the
CLK
and
DATA
signals
to
the
other
ICs,
so
that
the
signal
is
not
input
to
the
CLK
and
DATA
pins
of
LC7522.
@
Normally
high,
and
low
when
data
is
output.
EQIC
(LC7522)ST
©
CLK
signal
output
pin
for
CX7978,
TC9162N,
TC9163N,
TC9164N,
LM7001,
AND
LC7522,
@
DATA
signal
output
pin
for
CX7978,
TC9162N,
TC9163N,
TC9164N,
LM7001,
C7522,
and
LC7565.
Remocon
Received
LED
Directly
drives
the
remote
control
STANDBY/RECEIVED
LED.
\t
blinks
while
the
remote
control
signal
is
being
received,
and
is
lit
otherwise.
12

open |
drain
1/0
(CMOS)
ie)
(CMOS)
ie)
(CMOS)
ce)
(CMOS)
CIR
CUIT DESCRIPTION
@ FL segment control pin.
@ Negative logic.
e Drives the FL display through an inversion buffer.
‘ Power supply pin.
Serial
DATA
@ DATA pin for system serial communication .
@ Normally in input mode, and in output mode only when serial data is output.
e@ BUSY pin for system serial communication .
@ Normally in input mode. Outputs a high level signal when serial data is output..
Also provides the serial bus control function.
Output pin for the power relay control : Active high.
This is controlled by the POWER key. It alternates between high (Power ON) and low
(Power OFF) each time the POWER key is pressed.
@ FL digit contro! pin.
@ Negative logic.
@ Drives the FL display through an inversion buffer.
Input pin for the reset signal from the microcomputer .
@ System clock osciflator pin (4.194MHz) .
@ FL segment control pin .
®@ Negative logic.
@ Drives the FL display through an inversion buffer.
@ Key intake strobe signal output pin.
9g P
CT
13

KR-V86R
CIRCUIT DESCRIPTION
Biock diagram
BIT SEQ.
ae) BUFFER(16)
(| Porto (4 | POO—P03
(—} port: Ka ]Pi0-ps
=) porT2 {4 ) P20-p23
—_ PORT3 | 4_) P30-P33
BASIC
INTERVAL
TIMER
PROGRAM
INTBT
COUNTER (13)
TIOO TIMER/EVENT
COUNTER
PTOO/P20 O #0
INTTO
Tho TIMER/EVENT
COUNTER
GENERAL
REG.
PTO1/P210
Pan
ROM
oS
PORT
4
(4)
P40—P43
INTT1 PROGRAM
(Nort
|
5
(4)
PS0—P53
S1/P03
0
DECODE
$0/P02
0
Serer
tical
AND
Keo
INTERE
AGE
8064X8
BITS
CONTROL.
DATA
MEMORY
2
PoRT6
K
4
)P60—Pé3
Blend
elts
ait
Pont7
|
4
)P70-P73
INTO/P10
©
(__}
Ports
_
4
)Peo-ras
1/P
NEUEN
INTERRUPT
(~\
INT2/P12
0
(__}
eorts
{4
)
Poo-res
INT3/P13
©
ea
fx/2N
INT4/P00,0
=)
(4
)
P1201
pastas
cLock
|
clock
STAND
BY
es
—
oo
:
ry
ieee
ea
OuTPUT
|
oiviverR
|
GENERATOR
|
CONTROL
pres
PTHOO—PTHO3
[a
ABLE
CONTROL
port
13
{4
)
P190—
THRESHOLD
PORT #0
!
t
|
$
ot
PCL/P22 x2. x4 Vop Vss RESET
eae FE
14

15
*(PpseOg
Dd
BY)
UO)
Ajjeuse1xXa
pa}DaUUOD
aq
isn
Aay}
‘Aejdsip
74
ay
apISU!
PayauUOD
JOU
ale
,,¥,,
pue
’,
6
snes
u
‘l,,
SpuawBas
ayt
aoulg
te
aaber
Wee
Ulg
paaauUoZ|
Ajjeusazuy
:
2
PHD
:
7
epouy
-
WUBWe|t4
:
Se}0N
Md
|
Ma]
a
|
or
|
be
|
oz
|
ld
EERIE
a
6e
|
es
|
ae
|
oe
|
se
|
ve
|
ee
18
“ON [euluaL
ai
(Nd
(Wd
]
(Yd
|
(%d
9E
(d)d
|
(dja
ov
(4d
(thd
|
(W)d
ee ee eee eee
racia
[oe
a
facie
was
es
|
oe
we
(G0)
jars
[ward
|
98
[Teata
[96
[Wola
[crore
[tro
[Toto
(vO)d
|
(ED)d
DI}
(ZO)d
|
(Sd
|
DOL
|
(LO)d
|
(ZAG
|
(Lad
|
OLE
|
(vV)d
[(T1VW)}d]}
Oet
al
ae
ee
ae
eo
Lone
OSL
|
(6W)d
|
(8V)d
|
D9t
|
(ZV)d
|
(9V)d
|
DLE
|
(SW)d
|
(EV)d
|
OBL
|
(ZV)
|
(LV
)d
Pappa
ppope
te
tet
et
ey
ee
apos}9a}3
ag
© 00
7
Cr
<<
“ON [eulule
9pos198/9
“ON
(eU]Usi8f
9podyo3|3
“ON [eulwWsaL
apo.1j98}3
=.
“ON
JeulwaL
os]
—_
Pp Pp
pas
=
ME
NEL
W
VET
NE,
WA
IW
i
ce
oop
aD
.
-_
--
=
A
Re
21
1AM
LAN
LAN
ANI:
“
=
.
Lid
amma]
=
_
=
sb
d
jo
uw
nv
d
I01Ww
ss
*BOLVOION!
LESS
*|
ITEM
——s
—
—
—
SE
5250)
RTE
PINT]
AON
WA
NM]
WA
WW.
Lae
=>
9
*
(iS
Ks
I
a
|
IN
iM
ce
8
{i
ee
aoe
[le
mE
xo
a
ceases
‘
4
Po
zzvwe
1
;
o—fRanogHa]
=
17
‘
a
é
BaoaAae
SISTA
hs
nyt
uP
nal
Gepaleh
Is
WY
aT
x
:
Loa
as
ZIUN
els
aa
1xh
Is
A
~—
[6
Seite
[aanne
]
(esas)
oinv
8
By
bo
a
=
=
9t
92
9€
op
9S
oL
|
98 9b
901
oi
|ozt
{oer
|
ov
|
ogi
|
oor]
ozt
|
ogi
i=)
N
swe
ee
ee
|
OLVOICNI
.
nr
ei
hurt!
lod
na7l
|
heal
|
iA
F
elQEl
al
oe
STi
fh
ff]
“o'r
OON
Somes
mmm
4
ATF
/
NT
N07
|
|
|
|
S=25
|
CSE
=
“
semass
||
ALL)
AN
IAN
IANA
IAN
Casmreumney
|
4
=|:
=
g
°
=——-
(oe
an
ALWO
an
©
fe
3avi
|
NoOILoarNI
O1lanyv
,
=.
=
*
_2zve
HenoeHL—
:
SB}.
——
5
eS
Sisewaa
|
ZHH
my cl
7
WY
;
-
Vv
:
=
&
:
SNL
TA)
perme
eft
(Ij 1_!
Wa
<ss-
|:
=>
ee
|
eee
SM
fess)
|(omams)||
ounv
|)
[oso
fly
|
Shoe:
=
i=

KR-V86R
16
CIRCUIT DESCRIPTION
Test mode
(1) Setup and release of test mode
Setup :Apply test mode diode and reset the micro-
processor. In actual sets, short-circuit the test
mode set pins.
Release : Without the test mode diode, reset the micro-
processor. In actual sets, open the test mode set
(2) Contents of test mode
® Volume Up/Down operation
The operation attenuation level can be set at 3
points; OdB, —28dB, and —eodB.
Balance operation
Operation mode can be set at 3 points; L, center,
and R. :
E type
AM_ 531kHz
AM_ 630kHz
AM 990kHz
AM 1440kHz
AM 1602kHz
an @ EQ (Equalizer) Up/Down operation
. The operation level can be set at 3 points; + 12dB,
OdB, and —12dB for each frequency band.
@ Setting of the tuner adjustment frequency.
Preset chant | ———— Contes ——_]
Preset channel Preset channel
| 1__—=s[ FM_87.5MHz |FM_87.5MHz| 11s | AM_530kHz |
FM_94.0MHz |FM_94.0MHz| 15 | AM 1610kHz |
ee ee
17 -
p 8 [FM 1020MHz[FM1020MHz| 18 |
Pg EFM 106.0MHz [FM106.0MHz| 19 |
Initialization
(1) Amplifier section
EQ status : +0dB, FLAT
@ AUDIO SELECTOR: TUNER ®@ Contents of EQ program memory : +0dB, FLAT for
@ TAPE 2: OFF all channels
@ VIDEO SELECTOR : VIDEO 1 @ When SET mode is activated, ‘‘A’’ is recalled.
@ Volume : —56dB @ INC/DEC : None
@ Balance : center position @ £0: OFF
@ AUDIO INJECTION : OFF @ €OQ REC: OFF
@ Through dubbing : OFF
(2). Graphic Equalizer (EQ) section
(3)
Tuner section
Receiving frequency : FM lower limit
@ EQ memory mode : PGM AUTO mode
@ EO memory channel : Last memory setting (not SEEK LEVEL : High
preset channel) CATV : OFF
Preset function : 1 to 10
MUSIC SELECT : OFF
Preset memory : All clear

KR-V86R’ KR-V86R
CIRCUIT DESCRIPTION
Selector tuner
Amplifier section Tuner section
AUDIO VOL BALANCE Frequency AUTO SEEK
TIN BAND FM BAND AM AUTO
Frequency
Immediately after Dubbing 21 | Dubbing 3>1 UP/DOWN ppraleiiti
POWER ON AUDIO mode is mode is 1) MUSIC Recails preset 1) Sets Auto
SELECTOR : Changes each INJECTION - activated activated Front volume Balance —20dB SELECTOR : corresponding Enables direct Changes the Changes the AUTO/ Preset Scan mode HIGH/LOW
TUNER SELECTOR ON ; AUDIO AUDIO UP/DOWN L/R MUTING OFF to the numeric tuning band to FM band to AM MANUAL Start/Stop 2) MUSIC (in FM mode)
VIDEO 1 INJECTION : INJECTION : 2) Preset : keypad SELECTOR :
BAND : FM OFF OFF Last area OFF
“TUNER-——2”
*
(Scanning starts
from the lower
channel)
During frequency
UP/DOWN
(AUTO mode)
af
(Stop in
MANUAL)
t t
(UP — DOWN)
Ends direct
input
(Displays SEL.)
EaFRES
During direct
frequency input
While accepting
character input
t (Input with
numeric keypad)
af
>
—>
>
(Character
t t
select)
While displaying
a direct frequency
input error
+ |-]-
+P
—>
During memory
write enable mode
“>
“>
While displaying
volume attenuation
level
re
ae
*2
While dispalying
EQ. (graphic
equalizer) preset
When a source other
than “TUNER” is
selected
| : a
7 g
aie

KR-V86R
KR-V86R
CIRCUIT DESCRIPTION
*1 .K,P,U & UE types only,
*2 : E type only.
Tuner section
Frequency AUTO SEEK GENRE music *! catv “1
MUTING 10 KEY DIREC BAND FM BAND AM AUTO Y
eid
ia
:
ca
area
eae
pigieeas
oer
KEY
(5)
SELECT
atl
eras
ON/OFF
rg
Frequenc’
3
:
DoW
Auto
Memory
1)
Music
Select
:
Antenna
select
OFF,
Changes
Clears
the
preset
CATV/OFF
UP/DOWN
Start/Stop : ee aie . ,
1) MUSIC Recalls preset 1) Sets Auto Enables Advances the the genre information in (Activated in
SELECTOR : corresponding Enables direct Changes the Changes the AUTO/ Preset Scan di HIGH/LOW character input column for Preset : Mode select Enables memory | the memory area FM mode) :
OFF
to
the
numeric
tuning
band
to
FM
band
to
AM
MANUAL
Start/Stop
ah
Musit
(in
FM
mode)
1)
Preset
:
inputting
Last
area
ON/OFF
write
1)
Preset
:
1)
Preset
:
;
shit
36
2) Preset : keypad SELECTOR : Last area a character 2) Music Select : Last area Last area ‘ .
Last area OFF : ON, Recalls “TUNER ——2” 2) Muting is
“TUNER——2” the genre engaged
1 t "
(Stop in (Scanning starts
—20dB
Preset
area
MUTING
from the jower
MANUAL) channel)
=
ERR kis
elt
FA
!
iad
Ends direct
input
(Displays SEL.)
ee bes
(Recall)
(Character
(tnput with
numeric keypad)
select)
Ee
s)
ae
=
a
pe
a
EB
ae
Le Ee Es
=
=
pti fost
pt
pert s [ied
Red Sack Fant Sec Ae
19

KR-V86R
ADJUSTMENT
INPUT OUTPUT RECEIVER ALIGNMENT
io.
ITEM
SETTINGS
SETTINGS
SETTINGS
POINTS
ALIGN
FOR
FIG.
FM SECTION INPUT SELECTOR: FM MODE: STEREO
(A)
DISCRIMINATOR 98. OMHz Connect a DC
() 1kHz,+75kHz dev voltmeter between
60dBuCANT input) TP4 and 5.
(A)
98. OMHz
1kHz,+75kHz dev (@)
60dBuCANT input)
MONO
98. OMH2
DISCRIMINATOR
(2)
Minimum distortion.
Repeat alignments 1 and 2 several times.
(C)
98. OMHz
1kHz,+68.25kHz dev
Selector:L or R
Pilot: +6. 75kHz de
60dBuCANT input)
(C)
98. OMHz
1kHz,168.25kHz dev
4 SEPARATION Selector:L or R
Pilot: +6.75kHz de
60dBuCANT input)
(A)
IFT
. (Front end)
DISTORTION
3 (STEREO)
98. OMHz Minimum distortion.
Minimum crosstalk.
A compromise adjustment
may be required if left-to-
right and right-to-left
separations are unequal.
VR2
(B) 98. OMHz (X05~)
98.
OMHz
AUTO
Adjust
YR1
5
TUNING
LEVEL
0
dev
or
MONO
(x05-)
and
stop
at
the
point
13dBuCANT
input)
98.
OMHz
where
FLICTUNED)
goes
on.
AM
SECTION
Keep
the
loop
antenna
installed.
INPUT
SELECTOR:
AM
BAND
EDGE
530kHz
19
Lag
(1)
(1)
~
voltmeter
to
TP3.
(531kHz)
(X05-)
1.5V
Cb)
(2)
(2)
voltmeter
to
TP3.
(1602kHz)
(X05-)
8.0V
Cb)
Repeat alignments (1) and (2) several times.
Maximum amplitude and
symmetry of the
oscilloscope display.
Maximum amplitude and
symmetry of the
oscilloscope display.
@)
RF ALIGNMENT 600(603)kHz 600kHz
400Hz, 30% mod (603kHz) (X05-)
8 |
@)
RF ALIGNMENT 1400(€1404)kHz (B) 1400kHz TC1
400H2,30% mod (1404kHz) (X05-)
Repeat alignments (3) and (4) several times.
(B) 1000kHz L10
(999kHz) (X05-)
(E)
Connect a DC voltmeter Main
IDLE CURRENT = across CPI(L) volume: 0
CP2(R)
Maximum amplitude and
symmetry of the
oscilloscope display.
@)
1000(999)kHz
400Hz,30% mod
AUDIO SECTION
a
E
20
IF TRANSFORMER
VRICL)
VR2(R)
(X07-)
(F)
SPECTRUM
Connect
To
the
position
ANALYZER
an
AG(12mY,
LkHz)
so
that
the
lowest
level
SENSITIVITY
to
CD/AUX
of
the
spectrum
ADJUSTMENT
jack(L
&
R).
analyzer
lights.

KR-V86R
REGLAGE
N°
ITEM
L’
ENTREE
LA
SORTIE
AMPLI-TUNER
ALIGNER
POUR
SECTION
MF
Sauf
encas
d’
indications
spéciales,
régler
chaque
commutateur
comme
suit:
SELECTEUR
DES
ENTRESS:
MF
MODE:
STEREO
(A)
98, OMHz
lkHz.+75kHz dév
60dBuCEntrée ANT)
CA)
98, OMHz
ikHz.+75kHz dév
MOKO
98, OMHz
Relier un voltmétre
CC entre les
TP4 et TPO.
DISCRIMINATEUR
@)
DISCRIMINATEUR
(2)
Distorsion minimale,
60dBuCEntrée ANT)
Répéter les points 1 et 2 plusieurs fois.
(C)
98, OMHz
1kHz.168,25kHz
dév
Téte
H.F.
3
DISTORSION
Selection:L
ou
R
(B)
98,
OMHz
IFT
Distorsion
minimale.
(STEREO)
Signal
pilote:
(X05-)
+6,75kHz dév
60dBuCEntrée ANT)
«)
98,
OMHz
Diaphonie
minimale.
1kHz,
+68,
25kHz
dév
Un
compromis
de
réglage
4
SEPARATION
Selection:L
ou
R
(B)
98,
OMHz
VR2
peut
étre
nécessaire
si
Signal
pilote:
(X05-)
les
séparation
de
gauche
4
+6,
75kHz
dév
droite
et
droite
4
60dBu(Entrée
ANT)
gauche
sont
inéglage.
(A)
AUTO
Ajuster
VR1
et
arréter
5
NINEAU
98,
OMHz
ou
MONO
le
mouvement
de
VRI
D’
ACCORDER
0
dév
98,
OMHz
au
moment
13dBuCEntrée
ANT)
oa
le
FLICTUNED)s’
al
lume,
SECTION
MA
Laisser
l’
antenne
bouche
MA
installée.
|
SELECTEUR:
AM
C1)
(1)
-
CC
au
TP3.
(531kHz)
(X05-)
1,5V
(b)
(2)
(2)
=
CC
au
TP3.
(1602kHz)
(X05-)
8,0V
(b)
ts fois.
Répéter les points (1) et (2) plusieu
Amplitude et symétrie
maximale de 1’ affichage de
1’ oscilloscope.
(D)
600(603)kHz
400Hz.30% mod
@)
1400(1404) kHz
400Hz.30% mod
600kHz
(603kHz)
ALIGNEMENT H.T.
Q)
Amplitude et symétrie
maximale de |’ affichage de
lL’ oscilloscope.
1400kHz Tél
Fe
(B)
(1404kHz) (X05-)
Répéter les points (3) et (4) plusieurs fois.
ALIGNEMENT H.T.
(2)
Amplitude et symétrie
maximale de 1’ affichage de
V oscilloscope.
()
(5)
|
TRANSFORMATEUR
1000(999)
kHz
PoE. 400Hz.30% mod
SECTION AUDIO
L10
(X05-)
1000kHz
(999kHz)
(E)
COURANA
DE
Connecter
un
{114
|
POLARISATION
=
voltmétre
CC
CP1CCP2)
VR1 (G)
VR2 (D)
(X0T-)
Volume
principal: 0
(F)
AJUSTMENT DE Relier un AG
£2]|
LA
SENSIBILITE|
(12mV¥,
1kHz)
au
DE L’ ANALYSEUR CD/AUX prise
DE SPECTRE CL et RD.
Sur la position of
le niveau le plus bas de
l’ analyseur de
spectre s' allume.
21