Kenwood KRC-7701RY User manual

KRC-7701RY/787/807
|
KENWOOD
/887R/X957/PS987R
SERVICE
MANUAL
©
1999-3
PRINTED
IN
KOREA
B51-7451-00 (K) 2463
@ This service manual does not include information on the cassette mechanism assembly (exploded view, parts list,
schematic diagram or mechanism description).
For such information, refer to the cassette mechanism assembly service manual(D40-1122-05: B51-7452-00).
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(A64-1567-12)
(B10-2970-01)
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KRC-807
KRC-887R
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KRC-X957 KRC-PS987R
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(A64-1559-12) (B10-2964-01) (BO7-2146-03) (A64-1561-12) (B10-2963-01) (BO07-2140-03)

KRO-7701RY/787/807/887R/X957/PS987R
CONTENTS/ACCESSORIES
CONTENTS
CONTENTS / ACCESSORIES ..............::c00ecceeeeeeeseeees 2
BLOCK DIAGRAM. ...............::::cccecccecsesseeerssseeeeeeeeeeeees 3
COMPONENT DESCRIPTION..............:00080 veg teatetss 4
MICROCOMPUTER'S TERMINAL DESCRIPTION ...6
TEST MODE wisesk cosietcetdeccascavces vecesbcevevsosselecarsgoeneee teees 8
ADJUSTMENT ...........:::ccccccccccceeeeeeeeeeeeeeeseeteeeeneeneeaes 10
ACCESSORIES
L—-_
(510-4302 04) pe
-Fa0e- (G01-2924-04)
ee All model
or?
CES ce 2
Screw set Remote controller assy
(N99-1652-05) (A70-0883-05)
KRC-X957 KRC-X957
KRC-807 KRC-PS987R
KRC-PS987R KRC-887R
KRC-887R KRC-787
KRC-787
SA
Escutcheon assy
(BO7-2145-02)
DC cord
(E30-4549-05): KRC-807
(E30-4686-05): KRC-X957 KRC-X957
KRC-787 KRC-807
(E30-4687-05): KRC-PS987R KRC-PS987R
KRC-887R KRC-887R
KRC-787
O
Remote controller assy
(A70-0886-05)
KRC-PS987R
KRC-887R
KRC-7701RY
DC cord
(E30-4695-05)
KRC-7701RY oniy
PG BOARD eesescevccccdeces tac hstisasdvonieteen ce castes saute kee 11
SCHEMATIC DIAGRAM..............ccccesesenscsccueveseesevsees 15
EXPLODED VIEW(UNIT) ..........::cescccccessecceteeeeesseeees 24
PARTS LIST. vesckis seis oe 25
SPECIFICATIONS .............cccccccccesceeceseeeseees Back cover
Mounting hardware assy
(J21-9367-03)
All model
a
Size AAA battery
(Not supplied)
KRC-X957
KRC-PS987R
KRC-887R
KRC-787
E>
Bracket (L) Stay
(J19-4876-04) (J54-0606-04)
Bracket (R) KRC-X957
(J19-4875-04) KRC-807
KRC-X957 KRC-PS987R
KRC-807 KRC-887R
KRC-PS987R KRC-787
KRC-887R
KRC-787
>
y
ANT adaptor
(T90-0523-05)
KRC-7701RY only
Remote controller assy
(A70-0874-05)
KRC-7701RY only

SW5V
COM
Q87.89 4c0omv: (K) TYPE
. 213mV: (E) TYPE
160mV
RDS OUT
REQUEST
FSD OUT
FM SD
PLLCE
PLL DATA
PLLCLK
CASSETTE
2a
tt
Zz
an
an
MS OUT
PLL DATA
PLL CLK
MS OUT
R REEL
F REEL
MODE 2
MODE 1 DOLBY B/C
MODE
3
DOLBY
ON/OFF
TAPE IN MUTE
SUB+ Croe
SUB-
MOT+B
MOT-G
F/R
MS MODE
R REEL
F REEL
MODE 2
MODE 1
MODE 3
TAPE IN
CH RST
DATAH
DATAC
CLK
REQH
REQC
CH CON
CH MUTE
O-DATA
CH MUTE
RESET
DISPLAY
SDA
SCL
DOLBY
B/C
am
DOLBY
ONOFE
2g
MS
MODE
BrLCe
EX. AMP CON
SRM SW2
SRM SW
SRM DET
DIM CON
WHITE LED
(for 4V PRE,
Q33
ILLAVR
+B
IC7-9
© 4V PRE OUT
4V PRE
(K) TYPE | (E) TYPE
TAPE] 2000mvV | 2000mV
FM] 2000mv | 1524mVv
AM} 666mV | 950mV
CD CH} 4000mv | 4000mv
© 1.8V PRE OUT
(E) TYPE
1800mV
1372mV
855mV
3600mV
1800mV
1800mV
600mV
3600mV
© SP-OUT
© EX. AMP CONT
© ILL
© TEL-MUTE
Q26,27 OAS
ANT
| oat cont
Q31
TO P CON
© BACK UP
WVdYSVId 49018
U/BOSaILSEX/ULBR/08/28//AU LOL Ou)

KRO-7701RY/787/807/887RIX957/PS987R
COMPONENT DESCRIPTION
Synthesizer unit (X14-592x-xx, 6042-7x)
Component
Purpose, Function
Operation, Condition, Compatibility
IC1 uCOM system control
IC2 E-Vol, NC, MPX ;
IC3 Variable 3-pin regulated voltage supply
IC4 Power IC
IC5 IC for System E’s
IC6 DC/DC converter
IC7 4 V pre-out audio amp
IC8 4 V pre-out audio amp
IC9 4 V pre-out audio amp
IC10 Muting logic circuit
1C11 RDS demodulator
IC12 Noise amp
IC13 C and mask mechanism motor driver
IC14 E2PROM
IC15 Reset IC
IC16 Spectrum analyzer audio amp
IC17 Spectrum analyzer BFP
1C18 Spectrum analyzer data SW
Q1,2,3,4 Pre-out muting Muting is ON when base is “H”.
Q5,6
Non-fader pre-out muting
Muting is ON when base is “H’.
CH2 control SW
Q26,27
Back-up detection
Acc detection
Antenna control
CH2 is ON when base is “L” (when CHCON2 is “L”).
A8V SW Switched ON when base of Q18 is “H”.
A8V AVR 8 V is output when the A 8 V switch turns ON.
Qat ,22 B-U 5 V AVR 5 V output.
Q23 SW5V SW
5 V is output when base is “L”.
Absence of back-up voltage is detected when base is “L”.
Absence of Acc is detected when base is “L”.
ON when base of Q27 is “H”.
Q28,30,31 P-CON SW Switched ON when base of Q31 is “H”.
Q29 P-CON protection circuit Activated when P-CON output is grounded.
Q32 Dimmer SW Dimmer is ON when base is “H’.
Q33 Ilum AVR Illumination power output.
Q35,36 14V SW Outputs 3W, 14 V when base of Q35 is “H”.
Q37,38 Motor driver AVR Motor driver power output.
Q39 EX amp SW EXT AMP CONT goes “H” level when base is “L”.
Q40,44 Illum AVR SW Switched ON when base of Q40 is “H”.
Q41,42 C mechanism main motor power SW Switched ON when base of Q41 is “H”.
Q43 Sub-motor voltage SW Cassette mechanism is selected when base of
Q43 is “H” and Mask mechanism is selected when it is “L”.
Q51 SVR discharge circuit ON (discharge) when base goes “H” due
to momentary power down.
Q55,56 DC-DC converter AVR DC-DC converter power output.
Q57~62 +/- differential stabilizer circuit
Q71 Pre-out muting SW Muting is ON when base is “L”.
Q72 IC2 muting SW Muting is ON when base is “H”.
Q82 Forced Wide SW Forced Wide is set when base is “H”.
Q87,89 FM +B SW Switched ON when base of Q87 is “H’.
Q86,88 AM +B SW Switched ON when base of Q86 is “H”.
Q91 Noise detection buffer
Q92,93 Noise detection output time constant SW | Time constant provided when u-COM AFC pin is “H”
and not provided when it is “L”.
Qg4
Spectrum analyzer AGC

KRO-7701RY/787/807/887R/X957/PS987R
COMPONENT DESCRIPTION
Switch unit (X13-940x-xx)
Component
Purpose, Function
Operation, Condition, Compatibility
IC1 LCD driver, key scan
IC2 LCD driver
IC3
Remote control reception
Qi
Key scanning start
Q2,Q5
IC3 ON/OFF
Q3
LED (green) ON/OFF
Q4
LED (amber) ON/OFF
Q6
LED (dimmer) ON/OFF
Q7
LED (catch illumination) ON/OFF
Q8
VCD regulated voltage supply

KRO-7701RY/787/807/887R/X957/PS987R
MICROCOMPUTER'S TERMINAL DESCRIPTION
uPD784215GC075 (076) (IC1: X14-592x-11, 6042-7x)
Pin Name
Signal Name
Purpose
Operation Description
P120/RTPO HCON1 Changer 1 control terminal. Active: Hi.
P121/RTP1 ~CH_MUTE Muting input to changer. Muting request: Hi.
P122/RTP2 REQH Handshake request to changer. Active: Lo.
P123/RTP3 DIMMER Small detection. Active: Lo.
P124/RTP4 MOTOR Cassette mechanism main motor output.
Active; Hi.
P125/RTP5
O_CS
Open date chip select.
P126/RTP6
O_CLK
Open clock line.
CON) D/O) R/O) rm] =
P127/RTP7
Open data line.
Vdd Positive power supply.
X2 Main clock connection.
x1
Main clock connection.
Vss
GND terminal.
XT2
Sub-clock connection.
XT1
Sub-clock connection.
RESET
Reset input.
Active: Lo.
POO/INTPO
CH_RST
Reset output to changer.
Active: Hi.
PO1/INTP1 R_CLK RDS clock input.
PO2/INTP2/NMI REQC Handshake request from changer.
Active: Lo.
POS/INTP3 SUB_MOTOR3
Sub-motor output.
PO4/INTP4
SUB_MOTOR2
Sub-motor output.
POS/INTP5
PO6/INTP6
AVrefo
P10/ANIO
P11/ANI1
SUB_MOTOR1
CAS/SRM
SRM_SW1
Sub-motor output.
Cassette mechanism/SRM
mechanism voltage switching.
A/D analog power supply.
Phone detection.
SRM position detection.
C mechanism: Lo/SRM
mechanism: Hi.
- A/D reference voltage input.
1 V or less: Phone/
2.5 V or more: NAVI MUTE.
P12/ANI2
NOISE
FM noise detection.
P13/ANI3 SMETER FM S meter detection.
P14/ANI4 ANA_X Spectrum analyzer input.
P1I5/ANI5
ANA_Y
Spectrum analyzer input.
P16/ANI6
R_REEL
Cassette mechanism reel pulse input (FWD).
P17/ANI7
F_REEL
Cassette mechanism reel pulse input (REV).
AVss
A/D GND terminal.
P130/ANOO0
EXT_AMP
External amp control.
P131/ANO1 IF_MODE IF status detection for K2l. Wide: Hi/Narrow: Lo.
AVref1 D/A reference voltage input.
P70/RxD2/SI2
P71/TxD2/SO2
DATAC
DATAH
Data line from changer.
Data line to changer.
CH_CLK Clock line with changer.
P20/RxD1/SI1 L_DATAL Data line to LCD driver.
P21/TxD1/SO1
L_DATAS
Data line from LCD driver.
P22/ASCK1/SCK1 | L_CLK Clock line to LCD driver.
P23/PCL DIMMER Dimmer control output.
P24/BUZ BEEP Beep output. Active: Hi.
P25/S10
PLL_CE CE to PLL.
P26/SO0
PLL_DATA
Data input/output with PLL.
P27/SCKO
PLL_CLK
Clock output to PLL.
P80/AO
ILL ON
P81/A1
Illumination.
P82/A2
WIDE
K2I Forced Wide output.
Active: Hi.

Pin Name
Signal Name
KRC-7701RY/787/807/887RIX957/PS987R
MICROCOMPUTER'S TERMINAL DESCRIPTION
uPD784215GCO075 (076) (IC1: X14-592x-11, 6042-7x)
Purpose
Operation Description
P83/A3
K2I Forced Narrow output.
Active: Hi.
P84/A4
NARROW
AFC
Boise detection time constant SW
During reception: Hi/
During search: Lo.
P85/A5
L_CE
CE output to LCD driver.
P86/A6
L_INH
Reset output to LCD driver.
Reset: Lo.
P87/A7
SRM_SW2
SRM eject position detection.
Rise: Eject position.
P40/ADO: QUAL
RDS reception quality,
P41/AD1
R_DATA
RDS data input.
P42/AD2 SRM_DET
SRM mechanism detection.
Detected: Lo/Not detected: Hi.
P43/AD3
FM_SD FM SD input.
Station detected: Hi/
Not detected: Lo.
P44/AD4
P45/AD5
MUSIC
Blank detection input.
Music detected: Lo/
Music not detected: Hi.
P46/AD6
B/C Dolby B/C switching.
B: Lo/C: Hi.
P47/AD7 DOLBY
Dolby output.
Active: Hi.
P50/A8
EQ MUTE
EQ muting output.
During play: Lo/FF or REW: Hi.
P51/A9
MTL
Metal output.
Active: Hi.
P52/A10
F/R
Tape EQ input switching.
FWD: Lo/REV: Hi.
P53/A11
MSC
Blank detection time constant switching.
P54/A12 MODE2
During play: Hi/FF or REW: Lo.
Cassette mechanism mode detection.
P55/A13
P56/A14
P57/A15
-
Vss
MODE1
MODE3
PACK_DET
P60/A16
P61/A17
P62/A18
TYPEO
TYPE1
Cassette mechanism mode detection.
Cassette mechanism mode detection.
Cassette mechanism pack detection.
Pack detected: Hi.
GND terminal.
Destination type terminal 0.
Destination type terminal 1.
TYPE2
Destination type terminal 2.
P63/A19 ST_TYPEO
IC2 Ver.3 destination type terminal 0.
Initial value: 0.
P64/RD
ST_TYPE1
IC2 Ver.3 destination type terminal 1.
Initial value: O.
P65/WR
Output open.
P66/WAIT
ANA_A
| Spectrum analyzer frequency switching.
P67/ASTB ANA_B
Spectrum analyzer frequency switching.
Vdd
Positive power supply.
P100/TI5/TO5
Output open.
P101/TI6/TO6
SVR
Power IC reset.
Power ON: Lo.
P102/T17/TO7
Output open.
P103/TI8/TO8
P_MUTE
Power IC muting.
Active: Hi.
P30/TOO
ANT_CON
Antenna control.
Active: Hi.
P31/TO1 FM+B
FM power supply.
Active: Hi.
P32/TO2
AM+B
AM power supply.
Active: Hi.
P33/TI1
P_CON
Power control.
Active: Hi.
P34/Tl2
ACC_DET
Acc detection.
Acc OFF: Hi.
P35/T100
REMO
Remote control input.
"P36/TI01
P_ON
uCOM peripheral power supply.
Active: Hi.
P37
BU_DET
Momentary power down detection.
Power down: Hi.
TEST
Test terminal.
P90
IC2_SDA
IC2, IC5 and EEPROM data line.
P91 IC2_SCK
IC2, IC5 and EEPROM clock line.
P92
MUTE
Muting terminal.
Active: Hi.
P93
SW5
5 V power supply.
Active: Lo.
P94
P95 O/O/O/O/O} 6} j-|O}-|-]O/O/O/O/O;/O/ OO}: |O;O;O|—)—|—|—|—-| + |-| -|-| -j|O;OJ;OJO}O/;oO
CHCON2
Changer 2 control.
Active: Lo.

KRO-7701RY/787/807/887R/X957/PS987R
TEST MODE
99 MODEL
(1) How to enter the test mode
Reset the set while holding the FM and preset 6 keys
depressed. :
All indications light up at the moment the test mode
starts.
(2) How to exit from the test mode
Reset the set while holding the preset 6 key.
(Note) The test mode is not canceled by turning Acc
OFF, turning power OFF or causing momentary power
down.
(3) FM S meter voltage adjustment
1. Enter the test mode.
2. While holding the preset 1 key depressed, press and
hold the preset 6 key.
3. "ADJ OK" is displayed when the result is OK or "ADJ
NG’ is displayed when it is No Good.
(4) AM SD voltage write
1. Enter the test mode.
2. While holding the preset 1 key depressed, press and
hold the preset 6 key to write the SD voltage data.
(5) Forced Auto/Manual switching of K2I
Press and hold the TI key in the TUNER mode to switch
between AUTO and MANUAL.
The initial status is MANUAL, which is indicated by the
lighting of the dual dots.
(6) Forced Narrow/Wide switching of K2I
Press the preset 6 key in the TUNER mode to switch
between Forced Narrow and Wide.
The initial status is Wide, which is indicated by the light-
ing of the P/S dot.
(7) TAPE test mode specification
0 The blank skip function is initially turned off.
(8) Audio adjustments
o The volume should be set to -10 dB (displayed as
"30").
o The bass/treble and balance/fader controls are set to
full boost/full cut and full front/full rear respectively by
single press of the UP/DOWN key.
o The high-pass filter is set to Through/100 Hz/200 Hz by
each press of the UP key, or to 200 Hz/100
Hz/Through by each press of the DOWN key.
o Other adjustments are identical to normal operations.
(9) Back-up current measurement
When the set is reset while Acc is off (i.e. when the back-
up power is on) or when Acc is turned off in the middle of
test mode, the MUTE pin turns ON in 2 seconds instead
of 15 seconds. (The panel/CD/C/MD mechanism is not
activated at this time.)
(10) Procedure for security code registration after the
E2PROM replacement during servicing (KRC-787 only)
1. Enter the test mode (see "(1) How to enter the test
mode").
2. Press the SRC key to select TUNER.
3. Press and hold the AUDIO key for 1 second to enter
the menu mode.
4. Press the Track UP/DOWN key to select "SECURITY"
5. Press and hold the FM/AM key for 2 seconds.
6. Enter the security code by pressing the preset 1, 2, 3
and 4 keys:
Example: To enter "3510"
- Press preset key "1" 4 times.
- Press preset key "2" 6 times.
- Press preset key "3" 2 times.
- Press preset key "4" 1 time.
7. Press and hold the DISP key for 3 seconds so that
"APPROVED" is displayed.
8. Exit from the test mode (see "(2) How to exit from the
test mode").
(11) Simplified security code clear procedure (KRC-X957,
KRC-807)
1. During the code request mode, while holding the DISP
key depressed, press and hold the Volume UP key for
3 seconds (so that "- - - -" disappears).
2. Enter "KCAR" from the remote control unit. (Same
operation as with the ™98 models)
- Press numeric key "5" 2 times and press the Track
UP key (to enter "K").
- Press numeric key "2" 3 times and press the Track
UP key (to enter "C").
- Press numeric key "2" 1 time and press the Track
UP key (to enter "A").
- Press numeric key "7" 2 times and press the Track
UP key (to enter "R").
3. The security is canceled and the set enters the
TUNER mode.
(12) -1 MASK key write procedure in production line (when
the E2PROM is in the initial status) (MASK KEY type)
1. While holding the FM and preset 6 keys depressed,
press RESET to enter the test mode.
2. Press and hold the AUDIO key for 1 second to enter
the menu mode.
3. Press the Track UP/DOWN key to select "Mask key".
4. Press the FM or AM key shortly so that "TRANSMIT1"
is displayed.
5. Point the MASK key to the light sensor and press and
hold the key for more than 0.5 second.
6. When "TRANSMIT2" is displayed, press and hold the
MASK key again for more than 0.5 second. Note that
the first and second counter codes are not compared
at this time.
7. The write operation is complete when "APPROVED" is
displayed. At this time, the demonstration mode is set
and the test mode is canceled.
(Note) Similarly to the '98 models, leaving the set for
more than 30 minutes without writing the code causes
an error and turns power off.

KRO-7701RY/787/807/887R/X957/PS987R
TEST MODE
(12) -2 Procedure for canceling the MASK key request
(when the set is reset or the back-up power is turned off
while the MASK key is enabled)
1. When the power is supplied and the set is switched
on, "TRANSMIT1” is displayed and the MASK key
request mode starts.
2. Point the MASK key toward the light sensor and press
and hold for more than 3 seconds (until the level indi-
cator indicates the full condition).
3. When "TRANSMIT2" is displayed, press and hold the
MASK key again for more than 3 seconds.
lf "TRANSMIT1" is displayed now, go back to step 2
and restart from there again.
4. When "APPROVED" is displayed, the MASK key is
enabled and the set is turned on.
(12) -3 Procedure for MASK key initialization (Resetting the
MASK key enabled condition to the factory-set condition)
1. While holding the FM and preset 6 keys, press RESET
to enter the test mode.
2. "TRANSMIT" is displayed and the MASK key request
mode starts.
At this time, the display shows "* :&" in place of "[ ]".
3. Press the MASK key cancel remote control for more
than 3 seconds.
4. When "TRANSMIT2" is displayed, press and hold the
MASK key again for more than 3 seconds.
5. When "APPROVED" is displayed, the MASK key is
canceled, the demonstration mode is set, the test
mode is canceled and the set returns to the factory-set
condition.
(12) -4 MASK key all-clear procedure
1. While holding the FM and preset 6 keys, press RESET
to enter the test mode.
2. Press and hold the AUDIO key for more than 1 second
to enter the menu mode.
. Press the Track UP/DOWN key to select "Mask key".
4. Press and hold the FM or AM key for more than 2 sec-
onds so that "TRANSMIT1" is displayed.
5. Point the MASK key cancel remote control toward the
light sensor and press for more than 3 seconds (until
the level indicator indicates the full condition).
6. When "TRANSMIT2" is displayed, press and hold the
MASK key again for more than 3 seconds.
lf "TRANSMIT1" is displayed now, go back to step 2
and restart from there again.
7. When "APPROVED" is displayed, the E2PROM is
cleared entirely and the condition in "(14) MASK key
write procedure in production line (when the E2PROM
is in the initial status)" returns.
io)
(13) Other
o Automatic panel closing when the TAPE/CD/MD is
inserted is disabled.
o Pressing the ATT key ON/OFF opens or closes the
panel. (The ATT operation can be activated from the
remote control unit.)
o The DNPP/SNF key of the remote control unit (RC-_
510) functions as the menu mode ON/OFF key.
o The OPEN/CLOSE key of the remote control unit (RC-
510) functions as the audio adjustment mode ON/OFF
key.
o The menu feed operations occur only with the neces-
sary features.
o The communication line for the Opel display does not
stop communication even when it is not connected.
o Display such as "CODE OFF" is not displayed at the
moment power is turned on.
o The dimmer control of the FL models or the contrast
control of the LCD models can be adjusted only to
0/5/10 using the UP/DOWN keys.

KRO-7701RY/787/807/887A/X957/PS987R
ADJUSTMENT
Set the controls and switches as follows.
BALANCE :center position BASS _ ‘center position LOUD :OFF DOLBY NR :OFF
FADER _ :center position TREBLE :center position
TUNER
(RECEIVER)
SETTINGS
INPUT OUTPUT
Ne) kREM SETTINGS | SETTINGS
ALIGNMENT
POINTS
ALIGN FOR
FM SECTION
98.1MHz
SEPARATION | 1kHz,+40kHz dev | Connecta | TEST MODE:ON
(NARROW) Pilot:+6.0kHz dev | AC voltmeter | (Forced Narrow)
a Rabi . | Selector:LorR | toSPOUT | FM98.1MHz
(K2l) model." | g9qBu (ANT input)
Adjust it so that the crosstalk
from L to R and R to L become
minimum.
98.1MHz
ile
N
|
4kHz,467.5kHz
dev,
Connecta
|
TEST
MODE:ON
( facki ) | Pilot:+7.5kHz dev | AC voltmeter | (Forced Narrow)
or
2 Selector:L or R to SP OUT FM 98.1MHz
(Kel) model." | goqBy (ANT input)
Adjust it so that the crosstalk
from L to R and R to L become
minimum.
98.1MHz TEST MODE: ON
0 dev FM
35dBu (ANT input) 98.1MHz
S METER
VOLTAGE
Preset "1" key,
and preset "6" key
While holding preset "1" key,
press and hold preset "6" key
for a few seconds.
"ADJ OK" is displayed if the
adjustment is OK and "ADJ
NG" is displayed if it is not
good.
AM SECTION
990 kHz TEST MODE: ON
SD VOLTAGE 0% mod AM
35dBu (ANT input) 990 kHz
CASSETTE DECK SECTION
Connect a
AZIMUTH biosglong AC voltmeter | TAPE PLAY
TOKE to SP OUT
Preset "1" key,
and preset "6" key
Head Azimuth
Screw
Adjust the azimuth for each
While holding preset "1" key,
press and hold preset "6" key
for a few seconds.
"ADJ OK" is displayed if the
adjustment is OK and "ADJ
NG" is displayed if it is not
good.
Leh/Rch or FWD/RVS
becomes maximum
Connect a
ta TCC-130 AC voitmeter TAPE PLAY
to CN2
VR1 (L)
VR2 (R)
(X87)
TEST MODE : ON While holding the "FM" key and preset "6" key, reset the unit.
(Forced Narrow) —_ Hold down the "TI" key for 2 second. "DUAL" goes ON.
Press preset "6" key. "P/S" goes OFF.
“Europe (K2I) model : KRC-7701RY
*M (K2l) model : KRC-PS987R , KRC-887R j
\ L
©
O
[LCI
387.5mV (-6dBm)
ap
X87-300X-XX
VR1(sep.)
F/E
Z2xor
VR2
(R ch}
(CASSETTE MECHA. Assy)
4
R1
(L ch) ‘
(a) 387.5mV
ZEN
AC voltmeter
10