Kenwood KR-A4010 User manual

AM/FM STEREO RECEIVER
KR-A4010
SERVICE MANUAL
Panel* Metallic cabinet
(A20-) (A01-1746-01)
KENWOOD ier sipcness rnin Rasxaord
KENWOOD
© 1989-5 PRINTED IN JAPAN
B51-3894-00 (O) 3012
Front glass
(B10-1006-03)
Phone jack Knob
(E11-0162-05) = (K27-1987-04) x 2
Lock terminal board * Bindinng post
{E20-) (NO8-0128-35)
FSot* Phono jack
(J02-) x 4 (E13-0446-05)
Slide switch *
($31-2136-05)
Phono jack
(E13-0621-05)
Knob
(K29-3598-04) X4
Terminal board
(E20-0823-05)
AC outlet*
({E03-)
Slide switch
(S31-2132-05) (E30-)
Knob
(K29-3597-04)
Knob Knob
(K27-1725-04) (K29-3632-04)
Slide switch *
($31-3010-05)
Power cord bushing
(J42-0083-05)
AC power cord*
* Refer to parts list on page 38.

KR-A4010
CONTENTS
DISASSEMBLY FOR REPAIR ..............::c::seseeeseeeees 3 ADJUSTMENT ....0......ccccescccssesseceeseeeeneeseneenseensees 16
BLOCK DIAGRAM ............:.:::cccseceeeeeeseeeteeeeeseseneeeenee 5 REGEAGE: occ. civcancsccarieceaseseced caccessce cdelassssnrostactqeazes 17
CIRCUIT DESCRIPTION PABGLEICH oii ics sccesscciecieaceccaacve ctusecttseeteccdesoeseeseet 18
1. Description of components ............::::cseeeeeseeees 6 ADJUSTMENT/REGLAGE/ABGLEICH ................. 19
2. Microprocessor uPD7538AC-041 VOLTAGE: TABLE oes. cs. hcsccscccescbccccneendetediesncestcctes 20
(X11-2650-10 2 1C1) oo... ceeeeceeeeeeseeeereeeeeeeseeeenenesenes 7 PC BORD (COMPONENT SIDE VIEW) .............06 21
3. PLL CX7925B (X14-2540-10 : IC2) ..... ec eeeeseees 13 PC BORD (FOIL SIDE VIEW).............ccsscsssrscsersees 25
4. FM MPX AN7470 .(X14-2540-10 : 1C3) .............. 14 SCHEMATIC DIAGRAM ..............:ccsccsessereesersenecsenes 29
5. STK4171/5 : Main amplifier EXPLODED VIEW.............::.::ccescccssseeseseeensensneenseennee 37
(X14-2542-71: 1C7) : T, E type ........::sseseeeeeeees 15 PARTS: LIST: ii silceceses ees atieseiiln asec rece aateesa haste: 38
6. STK4172/2 : Main amplifier SPECIFICATIONS ............:cssseeeeeeeenenens BACK COVER
(X14-2540-XX : 1C7): K, P, M, X type..............006+ 15

KR-A4010
DISASSEMBLY FOR REPAIR
Befor repair work, take out the case.
1. Remove the five screws, then detach the front panel
(@).
2. Remove the two screws then undo the catch of the
sub panel (@ ).
3. Remove the one screw (@ ).
4. Undo the catch of the PHONES, then detach the
PONES boad (X14-) (B/3) (@ ).
5. Detach the knob using a screwdriver (@).
6. Undo the catch, then the knob (@).
7. Remove the one screw (@) and the one hook (@),
then detach the PCB.
8. Remove the one screw (@), then detach the power
switch.
9. Remove the six screws (@) and the twelve
screws (@ ), then detach the display board (X11-)
(A/2).

KR-A4010
DISASSEMBLY FOR REPAIR
When repairing or checking the main PC board and
power supply refer to the following steps.
1. Remove the five screws (@).
2. Remove the six screws (Q ).
3. In this way, the FM terminal mold will hit against
the chassis. To avoid this, lift up the main body
putting aside the rear panel in the direction of an
arrow (@)(@).

KR-A4010
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KR-A4010
CIRCUIT DESCRIPTION
1. Description of Components
CONTROL UNIT (X11-265X-XX) 0-10: K,P 0-21:M 2-71:X,T,E
Part No. Use/Function Operation/Condition/Compatibility
IC1 pPD7538AC-041 Micro computer
IC2 PST529C Reset
Q2 2SA733 (A) (Q,P) Cannel space selection ON : 9kHz, 50kHz OFF : 10kHz, 100kHz
2SA933S (Q,R)
Q3 2SA733 (A) (Q,P) Indication driver TUNED display
I 2SA933 (Q,R)
Q4 2SA733 (A) (Q,P) Indication driver STEREO display
2SA933 (Q,R)
Q5 2SC945 (A) (Q,P) LED driver For PHONO
2SC1740S (Q,R)
RECEIVER UNIT (X14-254X-XX) 0-10: K,P 0-21:M 0-71:X 2-71:T,E
Part No. Use/Function Operation/Condition/Compatibility
| 1C1 LA1265 FM/AM system IC FM IF amplifier detection and control : AM mixing, IF amplifier and derection.
IC2 CX-79258 PLL IC for frequency synthesizer PLL for electronic tuning.
IC3 AN7470 MPX IC MPX demodulator.
IC4 NJM4558D-A Equalizer amplifier Equalizer amplifier for PHONO (MM).
M5218P-A
IC5 LC7820 Input selector SW Analog switch for input selector switches.
C7 STK4172/2 Main amplifier Main amplifier (2ch). (K,P,M,X type)
1C7 STK4171/5 Main amplifier Main amplifier (2ch). (T,E type)
IC8 PC7812HF Constant voltage power supply 3-pin regulator for the +12V constant voltage supply.
Qi 2SK241 RF amplifier High-frequency amplifier. (K,P,M,X type)
Qi 2SK73 RF amplifier High-frequency amplifier. (T,E type)
Q2 2SC1923 (O) Mixing Frequency converter.
Q3 2SC1923 (R,O) OSC Local oscillator.
Q4 2SC1923 (R,O} OSC buffer OSC OUT (oscillator output) for synthesizer.
Q5 2SK161 (Y,GR) OSC buffer For local oscillator input to mixer. (T,E type)
Q6 2SC1923 (R,O) FM IF amplifier 10.7MHz amplifier.
Q7 2SC1845 (F,E) LPF Low pass filter for PLL.
Q8 2SC1740S (Q,R) LPF Low pass filter for PLL.
2SC945 (A} (Q,P}
ag 25C1740S (Q,R) Buffer Buffer for L6 (T,E type)
2SC945 (A) (Q,P}
Q10,11 25C1740S (Q,R) Emphasis switch ON for 75s, OFF for 501s. ( M type)
2SC945 (A) (O,P)
Q12 DTC124ES FM + B control
Q13 DTA114ES FM + B control
Q14 | DTC124ES AM + B control
Q15 DTA114ES AM + B control
Q17,18 25C2878 (B) Muting TAPE REC OUT pop noise prevention during switching selector switch.
Q19 2SA933S (Q,R) Muting control Main amplifier pop noise prevention during switching selector switch.
2SA733 (A} (Q,R)
Q20,21 2S$C2878 (B) Muting Main amplifier pop noise prevention during switching selector switch.
Q22 2SA933S (Q,R) Muting control
2SA733 {A} (Q,P)
Q25 2SA933S (Q,R) Muting Main amplifier pop noise prevention during switching power switch.
2SA733 {A} (Q,P)
Q26,27 2SC1845 (F,E) Protection
Q28 2SA945 (L,K) Regulator power supply Output transistor for 24V control voltage supply.
Q29 2SA933S (Q,R} Error amplifier -12V error amplifier.
2SA733 (A) (Q,P)
Q30 2SA945 (L,K) Constant voltage circuit -12V
Q32 2SC2003(L,K) Regulator power supply Output transistor tor 5V constant voltage supply.

CIRCUIT DESCRIPTION
2. Microprocessor 1. PD7538AC-041 (X11-2650-10 : IC1)
Terminal connection diagram & key matrix connection
KR-A4010
Lil
| | Reset ves 2
2 4!
| |-=e cli POO/INTO
33
Ca
|
vest
PO3/S!
(vem)
AUTO STEREO P53 P30 or
PHONO/MAIN 2 P52 P31 >
SUB
<7
PSI
P32
Pe
(1)
(>)
MUTE
P50
P33
od
ap
-
ee?
bae
~
©
|
SEG
P40
CX7925S
!
j
A
CLK
3
P2I7POUT
P42
=
9
coveann «<2 Pi03 P43 = a >h pai
Tuner
«<4
pioz
P80
i!
i
5
i5 28
VIDEO/TEST <= PIO! Pal fo |
TAPE/Bilingual
=
P100
P82
=
2
ae
|
To
$0 8 PUB (ee P83 25 3 | Grip la >t Video (co)
CE Pil2 P30 4
DATA = PI P9l 24 5.
BUSY PIO P92 6
Voo P93 POWER
LiL
Block diagram
POO/INTO
ZERO-
CROSS
DETECTOR
CLOCK
CONTROL
TIMER/EVENT
COUNTER
INTERRUPT
CONTROL
P80
PO1/SCK
PO2/SO
SERIAL
INTERFACE
PROGRAM MEMORY
INSTRUCTION
4096x8 BITS
DECODER
SYSTEM
CLOCK
GENERATOR
STANDBY
CONTROL
CLI CcL2 Vop Vss_ «RESET
GENERAL REGISTERS
STACK POINTER(8)
DATA MEMORY
160x4 BITS
Bond Bond
fo) |
PO3/S1
-_
Band Band
2
"8
Vere VioAD
| lee POO-PO3
PORT2
LATCH
BUFFER
P2I-P23
PTOUT/P2!
LATCH
BUFFER
PORT4
K_ LATCH K 4 pao-pa3
BUFFER
PORTS
LATCH
BUFFER
PORTS
LATCH
BUFFER
PORTS
LATCH
BUFFER
| 4) P90-P93
PORTIO
LATCH
BUFFER
K"4_) P100-P103
PORTI1
LATCH
BUFFER
K 4) PO-PH3

KR-A4010
CIRCUIT DESCRIPTION
Function of the diode switch
1. Models for each designated area and function setting switches
Model for desig- Set switch Receiving Channel Reference Middle
nated area Band 3|/Band 2/Band 1 frequency range spacing frequency frequency
87.5 ~ 108 MHz 100 kHz 50 kHz 10.7 MHz
530 ~ 1610 MHz 10 kHz 10 kHz 450 kHz
4
87.5 ~ 108 MHz 50 kHz 50 kHz 10.7 MHz
531 ~ 1602 kHz 9 kHz 9 kHz 450 kHz
163 ~ 281 kHz 1 kHz 1 kHz 450 kHz
0 0
K type or E type (without LW)
Band 3 H Overseas
L Domestic (Japan)
Band 2 H FMch space 50 kHz & AMch space 9 kHz
L FMch space 100 kHz & AMch space 10 kHz
Band 1 H Without auto tuning function only for LW broadcast
Band 0 H With LW: Indication (FM, MW, LW)
L Without LW: Indication (FM, AM)
LW key is not accepted.
2.
Stop
frequency
select
switch
for
auto
tuning
in
LW
@
Setting
of
this
switch
can
be
changed
without
reception
resetting
(unplugging/plugging
the
AC
cord.)
This switch is used to set the frequency which intakes
the SD signal in LW band reception. For both manual
and auto tuning, the tuning frequency is changed up or
9N-+ 2 |Frequency/Channel|Reference| Middle Stop
/9N range spacing | frequency | frequency frequency
down in 1 kHz step, however, in auto tuning mode, the 153 ~ 155, 164 .....
ae
1
281
kHz
|
1
KHz
1
kHz
450
kHz
|
525587
KH
receiving frequency stops at the following frequency = : :
163 ~ 153, 162...
selected by this switch. | o | 281 kHz 450 kHz | 950979 KHe
3. Auto tuning 4. Others
Auto tuning
Auto tuning function
Auto/Mono KEY Function
Preset 16
Preset 20
1 | Not available Mono/Stereo function only
0 Available This key is also used as the Auto/Man-
ual tuning mode key
Set switch
6)
1

KR-A4010
CIRCUIT DESCRIPTION
Port allocation
Function
Key return signal input
Key return signal input
Key return signal input
Key return signal input
PLL IC (CX7925B)
Function SW (LC7820)
Data output
PLL IC (CX7925B)
LAT output
PLL IC (CX7925B)
CLK output
oO} w
FL display segment output:
nN
Tyr} rT {Tz} TT TTT
a
T
Function SW (LC7820)
Key strobe signal output.
Key strobe signal output,
FL display segment output:
Key strobe signal output.
FL display segment output:
Key strobe signal output.
FL display segment output:
-1O}W!/N
xrjxrjrl/t
Key strobe signal output,
Key strobe signal output.
FL display segment output:
FL display segment output:
(0)
| oOo | H
i)
pa ef Key strobe signal output,
FL display segment output:
Key strobe signal output,
FL display segment output:
TFIO;T/MDIQl o;T]o
Key strobe signal output
oO
FL display segment output
FL display digit control pin: GRID 1
FL display digit control pin: GRID 2
FL display digit control pin: GRID 3
<
—-}O!}a
NIN w ames) oO
bf
t
T
lox Ke)
x }Tl/TyryTt
.|
Power supply input pin (5V)
FL display digit control pin: GRID 4
FL display digit control pin: GRID 5
FL display digit control pin: GRID 6
Input port: TV mode “Bilingual” pin (H)
Output port: Receiver selector “TAPE”
Input port: TEST pin (H)
Output port: Receiver selector “VIDEO”
Receiver selector “TUNER”
Receiver design: Receiver selector “CD”
System component design: Band data output (UHF: H)
Serial signal BUSY pin
Serial signal DATA pin
Back up detection pin
Station detection pin for auto tuning mode
OWN} -|O] w
=
Muting signal
TV SUB pin
Receiver design: Receiver selector “PHONO”
System component design: TV MAIN pin
Stereo (L)
MONO/SST key to control Mono (H)
Reset signal
Clock
Clock
Power supply for FL display pre-driver
Power supply for FL display driver (— 30V)

KR-A4010
10
CIRCUIT DESCRIPTION
Key matrix layout
POO (41) PO1 (40) PO2 (39) PO3 (38)
P30 (37) UP DOWN
AUTO
MONO
Preset
P31 (36) Scan
P32 (35)
——_--+
P33 (34) |
P40 (33)
Sound
multiplex
P42 (31) i cD
* Auto
tuning
P41 (32)
*16 Preset
20 Preset
P43
(30)
Receiver
@ Values in brackets (
*
Band 1 *Band 3
*Band 2
) shows the pin number of
P80 (29)
microcomputer.
@ items with an asterisk (") shows the diode switch.
Others are momentary switches.
@ LW (9N+2/9N) is the slide switch on the rear panel.
@ Key-intake is active high.
Tuner function
1.
Manual tuning
Each time the UP/DOWN key is pressed, the tuning
frequency is varied one step higher or lower. When this
key is kept pressed for more than 0.5 seconds, the
frequency is changed up or down at approx. 128
msec/step (approx. 224 msec/step for TV reception)
until the key is released.
. Auto tuning
When the AUTO/MONDO switch is set to AUTO, press-
ing the UP/DOWN key starts auto tuning. The tuning
frequency is changed up or down at approx. 128
msec/step (approx. 224 msec/step for TV reception)
until the high-level signal is input to the SD pin. When
the high-level signal is input, auto tuning operation
stops.
. Preset memory
Up to 16 or 20 frequencies (the maximum number of
preset stations is set by the diode switch) can be preset
randgmly for FM, MW (AM) and LW (TV) stations.
a) How to preset
When the MEMORY key is pressed, the MEMORY”
indicator lights and the unit is set to the write-enable
Status. Writing to memory is possible for approx. 5
seconds after the MEMORY key is pressed. During this
time, pressing any of the numeric key (1 — 10) will write
the currently-received frequency into memory corre-
sponding to the key pressed.
b) How to recail
When the tuner functions, pressing any of the preset
keys will recall the stored contents corresponding to the
key pressed.
. Preset scan
When the PRESET SCAN key is pressed, the SD pin
goes high level. A preset channel is received for 5
Test frequency
530 | 630 |
@ Test mode set-up: :
FM
87.5 89.1
AM
ee
1440/1602] 153
Set the test pin (P15) to high level, and invert it
to low level after turning the power ON. (The entire!
FL display will light except for MEMORY.)
seconds, then the receiving frequency is changed to the
next preset channel. When the SD pin is low level, the
receiving channel is changed to the next preset channel
after one second.
a) Key processing during scanning
@ Preset key: Stops the scanning operation and
receives the frequency of the designated preset
channel.
@ UP/DOWN key: Stops the scanning operation and
processes the UP/DOWN function.

Function of tact switches
Name
POWER
|
Power
ON/OFF
key.
Each
time
this
key
is
pressed,
the
Power
pin
is
inverted.
When
the
KR-A4010
CIRCUIT DESCRIPTION
Function
POWER switch is turned ON, the Power pin goes high level and the jast channel (which
is received when the power switch is turned off) is recalled. When the POWER switch
ig turned OFF, the Power pin goes low level and no indication will be displayed.
FM
AM (MW)
LW (TV)
Band
select
key
for
FM,
AM
(MW)
and
LW
(TV).
The
reference
data
and
the
program
data
corresponding
to
the
selected
band
will
be
transmitted
to
the
PLL
IC.
However,
if
the
band
which
is
the
same
as
that
currently
selected
is
selected,
the
command
Is
not
accepted.
DOWN
Numeric keys (1 - 8)
(numeric keys (1-10)
for 20-memory model)
MEMORY
Frequency up/down key.
@ Auto tuning
When
this
key
is
pressed,
the
frequency
is
changing
to
the
higher
or
lower
scale
at
approx.
128
msec/step
in
the
square
mode.
When
the
high-level
signal
is
input
to
the
SD
pin,
auto
tuning
operation
is
stopped
and
that
frequency
is
received.
@ Manual tuning
Each time this key is pressed, the frequency is changed up/down by one step (channel
spacing). When it is kept pressed for more than 0.5 seconds, the frequency is changed
at approx. 128 msec/step until the key is released.
Write key (during Memory indicator is lit).
During
approx.
5
seconds
after
the
MEMORY
key
is
pressed,
pressing
any
of
the
numeric
keys
1
-
8
(or
1
—
10)
will
write
the
frequency
and
the
band
which
are
currently
received
into
the
memory
corresponding
to
the
key
pressed.
@ Recall (when Memory indicator is not lit)
When any of the numeric keys 1 - 8 (or 1-10) is pressed, the memorized contents
(band
and
frequency)
corresponding
to
the
key
pressed
will
be
recalled.
When
the
VDD
signal is initially input, the |[owest frequency in the preset memories will be recalled
for each band.
AUTO
| Auto/Mono select key for FM broadcast.
Each time this key is pressed, the FM reception mode alternates between Auto and Mono.
The Auto indicator lights and the Auto/Mono pin is inverted.
@ When auto tuning is available, this key is also used for the auto/manual tuning mode
select key.
@
When
this
key
is
pressed
during
auto
tuning,
auto
tuning
operation
stops
and
the
manual
tuning
mode
resumes.
Preset Scan
4
When
this
key
is
pressed,
the
preset
channel
(1
-
8
or
1
-
10)
is
scanned
sequentially.
When
the
receiving
frequency
is
stored
in
memory,
its
contents
(frequency
and
banda)
is
recalled
and
received
for
approx.
5
seconds,
then
the
next
channel
is
received.
When
the
receiving
frequency
is
not
stored
in
memory,
the
next
channel
is
received
after
1
second.
MAIN
SUB
Sub Audio Program {bilingual audio channel) mode select key for TV broadcast
(MAIN/SUB/BOTH). Each time the key is pressed, the SAP mode is changed in the order
MAIN —~ SUB > BOTH, then MAIN resumes.
The indication and the pin status for each mode are as follows:
Mode Indication Port (Main) Port (Sub)
MAIN MAIN
L
BOTH MAIN SUB H
This key is effective only when the band is set to the TV position. When set to another
position, the MAIN or SUB indication will go off.
11

KR-A4010
12
CIRCUIT DESCRIPTION
Function
Each time the key is pressed, the preset group is alternated between A preset (1 - 8 or
1 - 10)and B preset(1 - 8 or 1 - 10) for recalling or storing. When pressed in the memory
write mode, the writing time is set to 5 seconds after pressing the key.
CD
PHONO
VIDEO
Used only when the unit is set to the receiver mode. By pressing any of these select keys.
the data is transmitted to the Selector IC and the input source is changed.
@ Keys related with the Tuner (except for the Preset and Band keys) are not accepted
other than when the input selector is set to TUNER.
@ When any input source other than TUNER is selected, pressing the Band key or Preset
key will change the selector to TUNER.
@ When the input selector which is the same as the current source is selected, muting
does not function.
Tape monitor key.
@ When pressed, the input source indicator LED (TUNER, CD, PHONO or VIDEO) is not
changed but the Selector IC is changed.
@ When the Preset Scan or Frequency Scan is engaged with the selector TUNER
selected. pressing this key does not stop the scanning operation.

CIRCUIT DESCRIPTION
3. PLL CX7925B (X14-2540-10 : 1C2)
Block diagram and terminal configuration diagram
SWALLOW 172
COUNTER
ree
PRESCALER
MAIN DIVIDER
(16-BIT, PROGRAMMABLE)
TIMING
CONTROLLER
Ves
CLK
LAT
DIN
x!
XO
Terminat description
Symbol Terminal Description
Vee
PCB terminal (Connect a 0.01 uF capacitor between the GND).
KR-A4010
CLK
Input
terminal
for
the
clock
used
for
20-bit
serial
data
input
(Shifted
at
the
rise).
Input terminal for the shift register input data latch signal (shifted at the rise) and, at the same time, for
the Up/Down clock (status changed at the rise).
Data input terminal, also the Up/Down mode switching terminal (Up mode with “H” level, Down mode
with "L” fevel).
High-frequency signal input terminal (150 MHz or 180 MHz max).
Power supply (+5V).
High-frequency signal input terminal (40 MHz or 50 MHz max).
Grouding terminal
13

KR-A4010
CIRCUIT DESCRIPTION
4. FM MPX AN7470 (X14-2540-10 : IC3)
Equivalent block diagram
SEP. ADJ
Lech
OUTPUT AMP
STEREO
7 MONO
SWITCH
CONSTANT
VOLTAGE
CIRCUIT
19 kHz
FREQUENCY °
CHECK
Terminal connection and functions
Terminal No. Connection/Function
| Supply voltage (+Vcc)
Stereo composite signal, input terminal
Input preamp, output terminal
L CH output amp, feedback terminal
[_R CH output amp, feedback terminal
R CH output amp, output terminal
L CH output amp, output terminal
Grounding terminal
Stereo display lamp drive and 19 kHz frequency check terminal
Stereo signal detector circuit, low-pass filter terminal
Stereo signal detector circuit, low-pass filter terminal
PLL circuit, input terminal
TPL circuit, low-pass filter terminal
PLL circuit, low-pass filter terminal
VCO freerun oscillation frequency adjustment terminal
Forced mono/forced VCO oscillation stop terminal
14

KR-A4010
CIRCUIT DESCRIPTION
5. STK4171/5 : Main amplifier (X14-2542-71 : IC7) : T, E, type
Equivalent circuit
.
oe
6. STK4172/2 : Main amplifier (X14-2540-XX : IC7) : K, P, M, X type
Equivalent circcuit
OO O O000
3 5 6 8 9 10 13 14 4

KR-A4010
16
ADJUSTMENT
eae: tae il INPUT OUTPUT TUNER ALIGNMENT
ITEM SETTINGS SETTINGS SETTINGS POINTS ALIGN FOR FIG.
FM SECTION (Unless otherwise specified, the individual switches should be set as following:
SELECTOR: FM MODE: FM MODE/AUTO
Connect a DC
(1) TP6 (YT) and TPS (GND). (Front end
Connect a DC
BAND EDGE voltmeter between TC1 8.0¥
(2) TP6 (VT) and TP 5 (GHD). (Front end
Repeat alignments | and 2 several times.
Maximum amplitude and
3 RF ALIGNMENT (B) L2-4 symmetry of the oscilloscope
98. OMH2 (Front end display.
DISCRIMINATOR
WONG
98. OMHz L14 OV (b)
(A)
98. OMHz
1kHz,+75kHz dev
(A)
98. OMHz
1kHz,+75kHz dev
60dBuCANT input)
Connect a DC
voltmeter between
TP3 and TP4.
Connect a 330kQ resis
(A) tor to TP1. Connect a
98. OMHz frequency counter to 98. OMHz VR3 76 . 0OkH2 (ce)
0 dev the resistor via
60dBuCANT input) an AC voltaeter.
(Cc)
98. OMHz
DISTORTION 1kHz,+68.25kHz dev (B) Miniaue distortion.
(STEREO) Selector:L or R (L or R)
BOdBuCANT input)
(C)
98. OMHz Minimum crosstalk.
LkHz, +68. 25kHz dev A compromise adjustment
Selector:L or R (B) 98. OMHz v4 may be required if left-to-
right and right-to-left
separations are unequal,
Adjust VR1 so that FLI (TUNED)
goes off. Then, adjust VR1
VR and stop at the point
where FLICTUNED) goes on.
Pilot: +6.75kHz de
60dBu CANT input)
(A)
98. OMHz
SEPARATION
0 dev
Al TUNING LEVEL
18dBuCANT input)
AM SECTION Keep the AM loop antenna installed. SELECTOR: AM
530kHz
Connect a DC
(1) TP 6 (YT) and TP 5 (GND). (531kHz)
Connect a DC
BAND EDGE voltmeter between 1610kHz TC 3 8.0V (a)
(2) TP 6 (VT) and TP5 (GND).| (1602kHz)
Repeat alignments (1) and (2) several tines.
Maximum amplitude and
symmetry of the oscilloscope
display.
Maximua aaplitude and
TC2
symmetry of the oscilloscope
Repeat alignments (3) and (4) several times.
display.
(B) L13
(X14)
98. OMHz
(D)
(3) ) RF ALIGNMENT 630kHz (B)
(1) 400Hz,30% mod
‘ ca
(4) 1] RP ALIGNMENT 1440kHz (8)
(2) 400Hz, 30% mod
Adjust ¥R2so that FLICTUNED,
goes off. Then, adjust VR4
and stop at the point
where FLICTUNED) goes on.
Maximum amplitude and
symmetry of the
oscilloscope display.
()
1000(999) kHz
0 dev
26 dBuCANT input)
€5)] TUNING LEVEL
1000KHz
20dBy(ANT input)
IF TRANSFORMER

REGLAGE DE REGLAGE DE REGLAGE DU POINT DE i
ITEW L’ ENTREE LA SORTIE TUNER L’ ALIGNEMENT ALIGNER POUR
SECTION MF Sauf en cas d’ indications spéciales, régler chaque comautateur comae suit:
SELECTEUR: FM MODE: Fl MODE/AUTO
Relier un voltaétre
BORD DE BANDE CC entre les foam | | 2,5¥ (a)
(ed) TP6 (YT) et TP 5 (GND). (Contrdle)
Relier un voltaétre
(Contrdle)
CC entre les
Répéter les points 1 et 2 plusieurs fois.
BORD DE BANDE
TP 6 (VT) et TP5 (GND).
Amplitude et syaétrie
(A)
98, OMHz
1kHz.+75kHz dév
(A)
98, OMHz
DISCRIMINATEUR | 1kHz.+75kHz dév
60dBuCEntrée ANT)
(B) MONO L 2-4 maximale de 1’ affichage
98, OMHz (Cont réle) de 1’ oscilloscope.
CC entre les
MONO
98, OMHz Li4 (b)
TP3 et TP4.
Relier une résistance
de 330kQ a TPl .
Raccorder un compteur
de fréquence & une 98, OMHz VR 3 76.00kHz (ec)
résistance par
l’ intermédiaire d’ un
voltmatre CA.
(Cont role)
98, OMHz
ALIGNEWENT HT
Relier un voltadtre
(A)
98, OMHz
0 dév
60dBu(Entrée ANT)
(c)
98, OMHz
kHz. +68, 25kHz dév
Selection:L ou R
60dBuCEntrée ANT)
(C)
98, OMHz
LkHz,+68,25kHz dév
SEPARATION Selection:L ou R
Signal pilote:
+6,75kHz dév
60dBuCEntrée ANT)
Distorsion miniaale.
(L ou R)
DISTORSION
(STEREO)
Diaphonie minimale.
Un ecompromis de réglage
VR 4 peut 6tre nécessaire s°
les séparation de gauche a
droite et droite a
gauche sont inéglage.
Ajuster VR1 que FLI (TUNED)
est non allumé. Alors,
ajuster VR1 et arréter le
mouvement de VR] au moment
oG le FLICTUNED)s’ allume.
(A)
NIVEAU 98, OMHz
D’ ACCORDER 0 dév
18dBuCEntrée ANT)
Laisser 1’ antenne bouche MA installée.
Relier un voltaétre
CC entre les 530kHz
TP 6 (YT) et TP 5 (GND). (531kHz)
Relier un voltaétre
CC entre les
TP 6 (VT) et TP 5 (GND).
SECTION MA SELECTEUR: AM
BORD DE BANDE
qd
(1)
1610kHz
(1602kHz)
BORD DE BANDE
(2)
Amplitude et symétrie
maximale de 1’ affichage
de |’ oscilloscope.
Amplitude et syaétrie
(B) TC2 maximale de |’ affichage
de 1’ oscilloscope.
Repéter les points (3) et (4) plusieurs fois.
(A)
(5) NIVEAU 1000(999)kHz 1000(999) kHz
D’ ACCORDER 0 dév
26 dBu(Entrée ANT)
)
(D)
(B)
(D)
630kHz
400Hz.30% mod
(D)
1440kHz
400Hz.30% mod
(3) | ALIGNEMENT HT
(4) | ALIGNEMENT HT
Ajuster ¥R2 que FLI(TURED)
est non alluaé. Alors,
ajuster VR4 et arréter le
mouverent de VR4 au moment
oG le FLICTUNED)s’ allume.
Amplitude et symétrie
maximale de |’ affichage de
I’ oscil loscope.
(6) | TRANSFORMATEUR
Fil.
1000KHZ
20DBy (Entrée ANT)
7

KR-A4010
Meccan | EINGANGS- AUSGANGS- TUNER- ABGLE]CH-
EINSTELLUNG EINSTELLUNG EINSTELLUNG PUNKTE ABGLEICHEN FUR ABB.
UKW-EMPFANGSABTEILUNG AuBer wenn anders angogeben, die verschiedenen Schaiter wie folgt einstellen:
SELECTOR: FM MODE:FM MODE/AUTO
BANDKANTE
qd)
BANDKANTE
(2)
EMPFANGS-
BEREICH-
ABST IMMUNGEN
DISKRIMINATOR
SPANNUNGS-
GEREGELTER
OSZILLATOR
KLIRRFAKTOR
(STEREO)
STEREO KANAL
TRENNUNG
(A)
98, OMHz
1kHz.t75kHz Hub
(A)
98, OMHz
1kHz.+75kHz Hub
60dBuCANT-Eingang)
(A)
98, OMHz
0 Hub
60dBu(ANT-Eingang)
(C)
98, OMHz
1kHz. +68, 25kHz Hub
Wahler: L oder R
60dBu(ANT-Eingang)
(C)
98, OMH2
LkHz. +68, 25kHz Hub
Wahler:L oder R
Pilotten:
+6,75kHz Hub
60dBu (ANT -Eingang)
Einen Gleichspannungs-
messer zwischen
TP6 (VT) und TP 5 (GND)
ansch] ieBen.
Einen Gleichspannungs-
messer zwischen
TP6 (VT) und TP 5 (GND)
anschlieBen.
Abstiamungen 1 und 2 mehrere Male
108, OMHz
ja: an
- tii
98, OMHz
Einen Gleichspannungs-
messer zwischen TP 3
und TP4 anschlieBen.
Einen 330kQ2 Wider-
standen zu TP!
anschlieBen. Einen
Frequenzzaéhler uber
einen Vechselspannungs
messer an den Vider-
stand anschlieBen.
98, OWHZ
L7
(Eingangs-
stufe)
TCl
(Eingangs-
stufe)
wiederholen.
L2-4
(Eingangs-
stufe)
8
(Eingangs-
stufe)
Maximal Amplitude
und Syametrie des
0szilloskopbildes.
ai
Miniaal Klirrfaktor.
(L oder R)
Minimales tibersprechen
Eine Ausgleich-regelung
kann notwendig sein,
falls links-zu-rechts und
rechts-zu-links.
Trennungen ungleich sind.
ABSTIMM PEGEL
MW-EMPFANGSABTEILUNG
(A)
98, OMHz
0 Hub
18dBuCANT-Eingang)
98, OMz
Die MW Rahmenantenne angebracht lassen
Einen Gleichspannungs-
messer zwischen 530kHz
TP 6 CYT) und TP 5 (GND)
anschlieBen.
Einen Gleichspannungs-
messer zwischen
TP 6 (YT) und TP5 (GND)
anschlieBen.
BANDKANTE
@
BANDKANTE
(2)
@)
630kHz
400Hz.30% mod
@)
1440kHz
400H2.30% mod
(3) | HF-ABGLEICH
@
HF -ABGLE1CH
(2)
(4)
Abstimaungen (3) und (4) mehrere Male wiederholen
(A)
1000(9939) kHz
0 Hub
26 dBuCANT~Eingang)
ABSTIMM PEGEL
(531kHz)
1610kHz
(1602kHz)
1000(999)kHz
YRZ
Den Pegel widerstand VR1
so einstellen, de& der
FLICTUNED) anzeiger nicht
leuchtet. Dann der Pegel
widerstand aufdrehen
und dem VR1 Halt geben
wobei den FL1CTUNED)
anzeiger leuchtet wird.
SELECTOR: AM
Maximal Amplitude
und Syametrie des
Oszilloskopbildes.
Maximal Amplitude
und Syametrie des
Oszilloskopbildes.
Den Pegel widerstand ¥R2
so einstellen, deB der
FLICTUNED) anzeiger nicht
leuchtet. Dann der Pegel
widerstand aufdrehen,
und dem -VR4 Halt geben
wobei den FLI(TUNED)
anzeiger leuchtet wird.
)
1000KHz
20dBy1 {ANT-Eingang)
18 2 -UBERTRAGER
Maximal Amplitude
und Symmetrie des
Oszilloskopbildes.

ADJUSTMENT/REGLAGE/ABGLEICH
KR-A4010
S0us FM DE-EMPHASIS 75s
FM 50KHz © CHANNELSPACE — FM 100KHz
‘AM SKHz <P AM 1OKHz
VIDEO 1
(A) as [1 FM-SG
75 2/300 2
Antenna adaptor
Adaptateur d’antenne
Antennenadapter
Dummy antenna
Antenna fictive
Kunstantenne
‘SPEAKERS
(40-162)
AC 110-120/220-240
SO/60H2
UNSWITCHED 200W MAX.
ACI10-120V am 220-2400
SERIAL NO.
INPEDANCE
SELECTOR
een
LESS THAN8Q —@B> 800R MORE
AC voltmeter
Voltmétre CA
Klirrfaktormesser
01° ogooo
Oscilloscope
Oscilloscope
Oszilloskop
9° oo000
(B)
Distortion meter
Distorsionmétre
Wechselspannungsmesser
Ee
©
ood
coodd
ee
®
seee 0 semeneuess
bs soe
19

KR-A4010
VOLTAGE TABLE
X11-265X-XX
IC1 1C2
2 2av_ | ! O = B E
3,4 | 26V l 5.5V 5.4V 5.5V
5 -23V [ «G ov 4.8V[PHONO} 4.1V(PHPNO]
7 |4.BV(PHONE)
18 | 4.9V
21 4.8V
42 OV
X14-254X-XX
C1 IC3
1~3 | 24V 1 11.3V
4 OV 2 2.5V
5~7 | 9.9V 3 6V
8 4.2V 4,5 | 9.2V
9 | 3.8V 6 3.8V
| 10 | 3.3V 7 3.6V
1 1.4V 9 11.2V
12 1.5V 10,11 | 2.6V 50p : 0.2V
13, 14 OV 12 ~14 2.6V 75p : 0.6V 75p : OV 75: OV
Wa 2.4V 18 4.4V ov | 7
16 1.4V 16 4.1V 11.9V 12V
17~19| OV TOV} on
20,21 | 3.9V | 1¢4 0.07V 12V
my, 2.8V 4 11.9V ov | ov
8 | -12.3V e 3.6V
1C2 ov | -oav
1 2.4V_ | 1C5 ov -0.4V
2~4 | ov 10 | -12.4V -0.4V 3.6V
5 2v i 5.5V -19.7V_ | -6.2v__|
6 2.4V 19 12V 11V | -
7 1.2V it a oe
8 | aN -13V. | ov
9 ov ~42.4V |) -12.4V
11 | 2.3V =| BV
12 5.1V
13 4.5V a ae a ee
14 ov Cn ee eee ee, ae
[| a5 | sev [a ae
| (X00) (B/2)
|
i
(X00-239)(A/2)
20 (XH B72) SS a