Kenwood KRC-758R User manual

KRC-758R/soa/essR/cw
|
KENWOOD
/883W/903/953
ed © 1997-2 PRINTED IN JAPAN
SERVICE MANUAL BT ab on sae.
The CASSETTE MECHANISM OPERATION DESCRIPTION is
the same model KRC-503 or KRC-658R.
Please refer to the service manual for model KRC-503 (B51-
7071-00) or KRC-658R (B51-7069-00).
Extension cord
Cassette mechanism (7P) W05-0477-00
Cassette mechanism (10P) W05-0609-00
Front glass Escutcheon
KRC-993
.
(B10-1742-01)
(BO7-2087-02)
5 eR EP Cem
o-mo a2 | Be Ae || ( [ne | | 068
\.
aati, TUNA,
DISP/B NR SCAN B.S/RDM REP T.C/0.SCN MTL/M.RDM
AUTO SAME
2 5)
Panel assy
(A64-0997-02)
Mounting hardware assy
(J21-7630-33)
Bracket
(J19-4721 -04)
Remote controller assy
(A70-0860-05)
Bracket
(J19-4720-04)
Remote controller
(4key)
(A70-0847-08)
Stay
(J54-0606-04)
Lever
(D10-4067-04)
Catt ace HAE =
_SRERETIONAL Soe sie Remote controller
(5key)
(A70-0848-08)
Screw set _—__2. ae
Sarre 3
(N99-1652-05)
Escutcheon DC cord Sticker : Double fase tape assy
(B07-2096-02)
(E30-4437-05)
(B42-4180-08)
(W01-0764-08)

~KRC-758R/803/858R/CW
/883W/903/953/958R/993
KRC-958R
Escutcheon
Front
glass
(B07-2087-02)
(B10-1741-01)
Panel assy
(A64-0996-02)
Remote controller assy
| (A70-0860-05)
So
Mounting hardware assy
(J21-7630-33)
DC cord
(E30-4435-05)
Remote controller (4key)
Lever é (A70-0847-08)
—— ee |
(D10-4067-04) :
Remote controller (key)
ee (A70-0848-08)
1ONAL GUIDE SHEET
Antenna adaptor
(T90-0512-05) ae
SEMS pages plete koctrt aaa
(NO9-1885-05) epee ie if : Double fase tape assy
Sticker & (WO01-0764-08)
(B42-4180-08)
KENWOOD a5wra KAC-053 Systemes ex celon Escutcheon
. } (BO7-2087-02)
Front glass
(B10-1743-01)
Panel assy
(A64-0998-02)
Mounting hardware assy
(J21-7630-33)
DC cord
(E30-4436-05)
Remote controller assy
1 (A70-0860-05)
& |
1
1
Steptoe
Lever . &
De a.?
(D10-4067-04) . |
Screw set 4
(N99-1652-05)
3 Bracket
(J19-4721-04)
Bracket
(J19-4720-04)
Stay Escutcheon
(J54-0606-04) (BO7-2096-02)

KRC-758R/803/858R/C/W
/883W/903/953/958R/993
KRC-903
Escutcheon
(BO7-2087-02)
Front glass
(B10-1748-01)
Panel assy
(A64-1003-02)
Mounting hardware assy
(J21-7630-33)
DC cord
(E30-4436-05)
Remote controller assy
(A70-0860-05)
Lever
(D10-4067-04)
Screw set 4
(N99-1652-05)
Bracket
(J19-4721-04)
Bracket
(J19-4720-04)
Stay Escutcheon
(J54-0606-04) (B07-2096-02)
KRC-883W
uy KENWGOD Sere# Meson stants
1 i
Escutcheon
Front glass (BO7-2087-02)
(B10-1749-01)
Panel assy
(A64-1004-02)
Mounting hardware assy
(J21-7630-33)
. Bracket
(J19-4721-04)
DC cord
(E30-4437-05)
Bracket
(J19-4720-04)
Remote controller assy
Lever (A70-0860-05)
(D 10-4067-04)
Pare ne Som aan a
Screw set
(N99-1652-05)
Escutcheon
(BO7-2096-02)
Stay
(JS4-0606-04)

KRC-758R/803/858R/CW
/883W/903/953/958R/993
KRC-858R/C/W Photo is KRC-858R
Front glass
KRC-858R:(B10-1745-01)
KRC-858C:(B10-1746-01)
KRC-858W:(B10-1747-01)
Escutcheon
(B0O7-2087-02)
Panel assy
KRC-858R:(A64-1000-02)
KRC-858C:(A64- 1001-02)
KRC-858W:(A64-1002-02)
Mounting hardware assy
(J21-7630-33)
Lever &
(D10-4067-04). =
DC cord
Antenna adaptor (E30-4435-05)
SEMS prt aennn
(NO9-1885-05) ee. ae
KRC-803
nen
=—
Escutcheon
a
s
RY
AO;
(B07-2087-02)
Front
glass
i ;
e
(B10-1744-01)
owo es. fil |
Panel assy
(A64-0999-02)
Mounting hardware assy
(J21-7630-33)
Stay
DC
cord
30-443G-05
(J54-0606-04)
ee
Bracket
(J19-4720—-04)
Lever
(D1
0-4067-04)
Bracket
Screw
set
—4
nO
(J19-472
—04)
(N99-1652-05)
Escutchor7
(B07-20S5- 02)

KRC-758R/803/858R/CW
/883W/903/953/958R/993
-
KENWOOD
3244
Kae-7588
ia
Escutcheon
Front
glass
(BO7-2087-02)
(B10-1752-01)
Panel
assy
(A64-1007-02)
Mounting hardware assy
(J21-7630-33)
Lever
(D10-4067-04)
Antenna adaptor
T90-0512-
(
2-05)
DC
cord
SEMS
(E30-4435-05)
(NO9- 1885-05)
CONNECTIONS brccteccceleccehevssvesseaassgocedspousectarteacbenstngvicsssntes 6 PO BOARD i: iis ei eeet ee asees iat evi nteedn Ate ed ads 21
BLOCK DIAGRAM .......ccccecccesecesececcesececcescesesecesseeasenseeeessees 7 SCHEMATIC DIAGRAM. ............cccccceeesescecessenseeeestens cusses 26
CIRCUIT DESCRIPTION .......cccccccscsscsscsccssesssscsssesesesseceees 8 EXPLODED VIEW (MECHANISM).............:cccsseeeseeu creas 37
MECHANISM OPERATION DESCRIPTION...........c0000 14 EXPLODED VIEW (UNIT) uu... ecccccccesecereeesseeeeenen erases 38
ADJUSTMENT wooo ceceeceseescessescesesessssscescsesnesseessenes 16 PARTS LIST iif ceil te atiat evi sakes dectads Bussvessteasentacertd 39
ABGVEICH 2: oso ccc sdhsiesest ach eeechesiiieriudn a hia aor 18 SPECIFICATIONS. ..........cccccsscscesessseessenseenes BACK COVER

KRC-758R/803/858R/C/W
/883W/903/953/958R/993
CONNECTIONS
KRC-803/883W/903/953/993
Non-fading left output (White)
KENWOOD disc changer
control input
To connect the Disc changer,
consult your Disc changer
manual.
FM/AM antenna input
Rear left output (White)
\f no connections are
made, do not let the
wire come out from the
tab.
Rear right output (Red)
Non-fading right output (Red)
Wiring harness
(Accessory@)
White/Black
=)
When using the optional power amplifier,
J To front left
connect to its power control terminal.
| speaker
White @
Ground to any metal part of the car through
the
switch.
Valet
wire
(Pink)
Depending on what antenna you are using,
FRONT -R ®@ speaker
connect either to the control terminal of the Gray
motor antenna, or to the power terminal for ANT.CONT. | Motor antenna control wire (Blue
the booster amplifier of the film-type antenna. eee) (KRC-993 / 883W only) Ne! Green/Black fo)
To rear teft
REAR +L speaker
Ignition
key
[REAR
|
Green
®
switch
Ignition
wire
(Red)
ea
fuse
—_
Purple/Black
OX (S)
;
ar
fuse
box
:
To
rear
right
we
Battery
wire
(Yellow)
speaker
use
-_—
P
‘
Purple ®
i f Ground wire (Black) ©{To car chassis)
Battery
When only two speakers are being connected to the
system, connect the connectors either to both the
front output terminals or to both the rear output
If you connect the ignition wire (red) and the battery wire (yellow) terminals (do not mix front and rear). For example, if
to the car chassis (ground), you may cause a short circuit, that in you connect the ® connector of the left speaker to a
turn may start a fire. Always connect those wires to the power front output terminal, do not connect the ©
source running through the fuse box. connector to a rear output terminal.
KRC-758R/858R/C/W/958R
Antenna Conversion Adaptor (ISO-JASO)} (Accessory@)
Antenna Cord (ISO) * FM/AM antenna input
=O DS >
Connector Function Guide
Pin
Numbers
for
;
Red Ignition (ACC)
Blue/White Power Control
Yellow Battery
Black Earth (Ground)
Connection
Rear left output (White)
Front left output (White)/
Non-fading left output (White) (KRC-958R,858R/C/W only)
KENWOOD disc changer control input
To connect the Disc changer, consult your
Disc changer manual.
Rear right output
(Red) Fuse
Front right output (Red)/
Non-fading right output (Red)
{KRC-958R,858R/C/W only)
Wiring harness
(Accessory@)
Purple Rear Right (+)
Purple/Black Rear Right (—)
Front Right {+)
Front Right {-)
Front Left (+)
Front Left (-)
Rear Left (+)
Rear Left (-)
If no connections are
made, do not let the cable
come out from the tab.
Battery cable (Yellow) Connect to the terminal that
iS grounded when either the
telephone rings of during
conversation
TEL mute cable (Brown)
ignition cable (Red)
Connect either to the power
control terminal when using
the optional powes amplifier,
or to the antenna contol
terminal in the vehicle.
Power control/ Motor antenna
control cable (Blue/White)
H [ cont out |
tg 6 a 12
VisBh
ig te 14 12
7:15 ii
A-4 Pin (Red)
A-7 Pin (Yellow)
Connector A
Connector B

(X14-$58x—Xxx)
|®|@|0.0/© |
[wro=983 [0-21 [ves] ves| No [WO |
[—“erc=953 | “0-11 [ves] ves] _no_| ves |
RRC=B58R/C7w|2-71_[ wo |¥ES|_YES_[YES |
[_krc-803 | o-12_Tves|ves| No | NO |
| wne-203 [0-13 [yes] no | no [es |
[Kec=eesw | 0-22 [no [eS] nO [nO |
[Txne=7580 [2-72 [wo [wo | ves [YES]
NOISE
DETECTOR
Ba
Bigg
ae
lfeneyt
| TAPE MECHA. ed
(CDS-522K1)
ee
|
PACK DET ——
SYSTEM u-COM
AL
Rae
8
BRE
22
EFS
sass
g
@
CD-CH ISO AMP
Txa3
AC OUTZ L
AC OUTZ R
FW
ROW
(PANEL)
Hit ond KEY
ORIVER
CD=CH | S214mv
Fu | 1800mv
Ast | 600mv
TAPE | 1800mV
H.P.F BUILT-IN
FRONT/N-F
PRE OUT SW
3214mv
1372mv
855m
1800mn\
©
[_useD ev PRE]
[__Toervee T ceyrree | cxyrvec [epee |
1434mv | 1434¢mv
Boamv | 613mv
268mnv | 382mv
B0smv | B04mv
wee
OUT
L
€0)
OUT
ae
ay
Aa)
|
eerie
PON sv PON 5V ros
9309,310
ILL AVR
(LED)
303,305
iLL AVR
(LAMP)
a
| aes ee (ee
:
& ] FRONT ich
SP OUT
ee (| FRONT Rech
ra ae
SP OUT
| REAR bch
SP OUT
SP OUT
FRONT/N-F Leh
PRE
PRE OUT
6) REAR Leh
PRE OUT
PRE OUT
[__[cxyrvre T ceyrvee [ (uyrvee | (ever |
CO—CH | 3214mVv | 3214mv | 4000mv | 4000mv
Fu} 1800mv | 1372mv | 2250mv | 1715mVv
Aid} GOOmv | BSSmv | 712mVv | 1068mv
TAPE | 1800mv | 1800mv | 2250mv | 2250mv
© VALET
© TELMUTE
Q202
[ant con | CON © ANTCON
© PCON
POWER SUPPLY IC
P-CON STBY
€66/d8S6/ES6/E06/ME88/ eee
MWO/H8S8/808/H8S2-0H

KRC-758R/803/858R/CW
/883W/903/953/958R/993
CIRCUIT DESCRIPTION
Description of components
Synthesizer Unit (X14-558X-XX)
Purpose,Function
IC1 System control u-CON I a eee
Analog SW
Noise Amplifier ee es eee eee eee
IC4 Electronic volivme Incorporates EQ amp, E-Vol circuit, NC, MPX, CD-CH ISO, T-ADV, METAL,
bass, treble and loudness circuit!
olby IC
Power amplifier
Multi power supp!
RDS Demodulator
SUB/RETRA motor driver
DC/DC converter
C11,12 PRE amplifer
1C13 FM IF System
C14 Front/non-fader preout SW with built-in HPF
C15 E2P ROM
C16 Triple 3-input NOR Gates
Q1~4 PRE MUTE
Q101 FM LO/DX SW
Q102 FM VT inhibit
Qi21 Noise detect driver
Q122,123 Noise detection output time constant SW
Q141 LPF time constant SW
Q142 LPF constant current suppl
Q143 FM L.P.F
AM L.P.F
Sub-motor voltage SW
AFC time constant SW
AF Buff
FM S-METER Buff
IF Amp
9)
© IN j®
9
1C10 +/- power supply for the 4 V preamplifier.
For the 4 V preamplifier.
re) a
For muting.
ON for muting.
ON for local seek.
ON for AM
Half-wave rectification.
ON during FM reception. (OFF during seek/search
ON during FM reception. (OFF during seek/search
Q
R
N during SRM operation.
N during FM reception (OFF during seek/search
Q151
Q161,162
63
64
Q165
‘9)
{e}
S
Q181 IC4 MUTE SW ON for muting.
Q191 CRSC SW In case of production of multi-path noise, etc., goes ON to force monaura
reception.
201 B-U detect
202 ANT-CON driver
203 ACC detect
204 ANT CON SW
Q205 ILL ON SW When power is OFF and Acc is OFF, going "H" of PON turns ILL ON "H'|
which turns only ILL +B OFF.
ON at power ON.
ON while B-U is supplied.
ON for muting.
ON at power ON.
ON with CH-CON 2.
ON at power ON.
ON at power ON.
P-on 5V SW
VDD driver
Pre-MUTE SW
P-on 5V driver
CH-CON2 SW
IC10 power regulator
1C10 power regulator SW.
1011/12 +B regulator
1¢11/12 -B regulator
FM OSC SW.
AM OSC SW
Q207
Q208
Q209
Q231,232
Q241,242
Q243,244
Q245,246,247
Q248,249,250
Q251
ON in FM mode.
ON in AM mode

KRC-758R/803/858R/C/W
/883W/903/953/958R/993
CIRCUIT
DESCRIPTION
|
Device
|
—_——Purpose,Function
Operation,condition,compatibili
Q301
Main
moter+B
driver
ON
while
the
main
motor
of
the
cassette
mechanism
is
operating.
}asoz___—[Mainmotersw
|
ON
while
the
main
motor
of
the
cassette
mechanisms
operating,
[asii__[Resetew
ON
atreset
OO
C™~™~—CSOC*dY
Switch Unit (X13-905X-XX)
Operation,condition,compatibili
1/3 duty LCD display driver with key input
(een ee eer et
ica
a2
duty
general-purpose
LCD
displaydriver
|
C—C~C—C~sCSCSCSC*d
ics
[Remotesensor
|
C—COSOSCOC“CSC‘C(C‘*C

KRC-758R/803/858R/CW
/883W/903/953/958R/993
ciRCUIT
DESCRIPTION
1C1:178016BGC51X (X14-558X-XX) zee _
se PFS w
178018BGC511
5
3
26838
~
.
«3
Bee.n282sss8525 25258
Microcomputer
eSerxreelse2eaaet#PELSESRS
Prittiliitt tt bebe tetret
Pin
layout
18
17 16
75
14
73
72
71
70 69 68
6
NOISE > — E20T!
SMETER > > BEEP
SHOEI -> — REQH
SRM_SWIE > -> CHCONI
T_MODE > —> — CHCON2
NC oo > TLL_ON
L_DATAL > > PON
SELO
/
L_DATAS
= >
P_CON
SEL / LCLK < —> FM/AM
Lee = uPD178016BGC—xxx-—3B9 (KM type) - WoT
LW < uPD178018BGC-xxx—3B9 (E type) Fee
DATAC > > P_STBY
OATAH
=
>
Sree
CHCLK
—> —»
MUTE
Mm
+
+
SDA
TEST
«+
>
SCL
1FCONT
<=
>
poLey
TEND
>
-—
WIC
‘mR
>
ARM
PACK_IN.
>
—
—
AMSD
23 24 25 26 27
~~ ~ >
~ = -
ie
> -
GNDPORT
GNOPORT
QUAL
R_D,
MUT
AMIFC FMLFC
VDD_PLE
VCOH
vCOL
GNDPLL
E00 E01
tc
SEL2 / LPF (E)
AFC
Terminal descriptions
| PinName | vo | escription =i sat C
JEM noise detection analoginpt, |
[FMS meter detection analoginput, CT
PHONE (E) Phone/navigation muting input. Rona!
[Cassette mechanismmode input.
eae
aoe
T_MODE
[DatainputfomCH.
DATAH
[DataoutputtocH.
oe oe al
Clock output to LCD driver. i. ll
Cassette mechanism pack-in detection input.
ReGen a ee eg
Mie 22 ae eg ne ge
LADS receivingcondiion,
fad
ee
E ze
7 ral
C | o |
zi PO.
3 ae
Z Row
si em
PLINH | © |ResetoutputtoLCcDdriven —“—‘“‘C™S™C™COCOC~C‘*dCSOR Cd
Ipatac |_|
[pataH | _o |
iS | 1 [ClockinputfromCH. ee —“—S™SCSCCSCidC
ee
om
z | o |
xz |
rR P|
In [|
aaa
aa
eae
es
1
+
5
nei
ea
marae
ee
Eel
aa
aces
eae
ieee
10

KRC-758R/803/858R/C/W
/883W/903/953/958R/993
CIRCUIT DESCRIPTION
| PinName | vo
24 R_DAT
25
26
27 FM_MUTE
28 AMIFC
FEMIFC
VDDPLL
RDS data input.
Not used.
Not used
Band muting detection input.
AM IF count input.
FM IF count input.
ZiZz
<
0) fe) x
in
3
=
= | Qa @ QD 2 a
30
31
32 VCOL
33 GNDPLL
FM OSC input.
AM OSC input.
Grounding.
PLL error output 0.
PLL error output 1.
Grounding.
Low-pass filter switching output. H:During receptio!
AFC output. H:During receptio:
Position detection input 2 from SRM.
SRM detection input.
AM station detection input.
Local output.
Antenna control output.
Tape music detection input.
Dolby control output.
Clock output to E-Vol circuit.
1/0 __| Data input/output from/to E-Vol circuit.
Muting output.
AF muting output.
CRSC output.
Power amplifier STBY output.
Acc detection input. L:Acc detected
Momentary power-down detection input. H:Power down
FM/AM switching control output. H:AM L: FM
Power control output. H:ON
Microcomputer peripheral power control output. H:ON
w ai
o) < a a
@
N
a 0 nN
GI
on <
w ©
>
2 5 i?) gs =
SRM_SW2
SRM_DET L:During
H:Station detected
H:ON
H:ON
L:Music detected
H:ON
> > = u
4
42 LO/ DX (E)
)
=
|
Sz w |B} <lo]
oO
n oO
re
a
2
©
g oS a
boa] palo Q|9
&
o
iw) }
>
47
H:MUTE
ON
8 AF/MUTE
(E)
CRSC
(K/M)
P_STBY
ACC_DET
1 BU_DET
52
53
= Cc par m
pp
H:ON
QO
ai
=
= > =
55
6
7
ILL_ON IIlumination output.
CH2 control output.
CH1 control output.
Request to CH.
Beep output.
Data input from E2PROM.
CE output to E2PROM.
Clock output to E2PROM.
Data output to E2PROM.
Cassette mechanism pack detection.
Cassette mechanism main motor contro! output.
Cassette mechanism STBY input.
Remote control signal input.
RDS clock input.
Request from CH.
Cassette mechanism/SRM sub-motor output 3
Cassette mechanism/SRM sub-motor output 2
H:ON
H:ON
L:Reque sted
Qa ja
SiS iam
m | 9
= r
a elaP Rais ig igi
: Blo Eg (8 Ss |s ZIOlx OI \o
6 D 9
D
%
2\2 \~ 8/8 8 2 |2 Zz = |
foe)
x fe)
Zz
61
62
PACK_DET H:Pack cletected
65
H:STBY
[o>]
REQC
L:Requested
7
71
oO
SUB_MOTOR2
N11

KRC-758R/803/858R/CW
/883W/903/953/958R/993
12
CIRCUIT DESCRIPTION
| oO
| oO |
IReacpu |
eee
es
a
IREcosc |__|
a
ae
VOD
72
73
|_so__[reseT___|
Security Code Write Procedure After
E2PROM Replacement
The security code can be written only when the
E2PROM has been replaced with a E2PROM in which
nothing is written.
1. Code write procedure
1) With the power ON, switch the source to ALL
OFF, then press and hold preset key 6 for 3
seconds.
ENTER
CODE - - --
2) was the desired code using preset keys to
4}.
Example of entering code 1240
fi] - oe g---
cn wats cae a
[2] --- coe 18--
[2] dee cs veal aa
[2] --- Cope }e--
[3] -- Cope 12@8-
[3] --- Cope ae
{3] -- ites l2e-
[3] -:: Capen hea
Ls] --- oe 1e4-
[4] --- Cope 124@
When the 4th digits have been entered
4
TPinNo.|
PinName
|
VO
|
——————~*~“~*‘éi
scription
|
[72
|sus_motont
|
Cassette
mechanism/SRM
sub-motor
output
1
:
ff
9
[
23
CAS
/SRM
Cassette
mechanism/SRM
sub-motor
voltage
switching
output.
H:SRM
L:TAPE
CPU
power
regulator.
aaa
xtalconnection,
Xtal
connection.
—aee
Regulator
for
oscillator.
Pa
Power
voitage
terminal.
aan
3) Press and hold the CLK key for 3 seconds: : -
Completion of code entry.
abi a
4) Set the RESET switch to ON.
Now the code write procedure has completed. The
security mode is set entirely to the initial condition.
* To quit this mode in the middle (before the end of
step 2), simply turn power OFF. The same
operation can be restarted from step 1.
* Be sure to write the security code following the
above procedure. If you commit a mistake or hold
the CLK key for 3 seconds or mode in the middle of
the code entry, normal code will not be written in
the E2PROM.

KRC-758R/803/858R/C/W
/883W/903/953/958R/993
CIRCUIT DESCRIPTION
1. Code permission procedure Code request mode
L paul Heroes an Paint here ley be ie When the power of the unit is turned ON after the unit
aes te has been reset while the security function is activated,
ENTER this mode requests the user to enter the previously-set
CODE - --— - code.
|
2) me the desired code using preset keys to
4 @ Operation description
¢ The code should be entered using 4 numeric
Example
of
entering
code
1240
keys
[1], [2],
[3]
and
[4].
ve
gope
@---
*
Each
press
of
keys
[4],
[2],
[3]
and
incre-
Sane
ments
the
digit
of
1000,
100, 10
and
1
respec-
|
tively.
CODE
1
@--
e
When
the
4th
digits
have
been
entered,
the
code
4
is
subjected
to
judgment
and
the
power
is
turned
CODE
!
I1--
ON
only
when
it
is
correct.
eee
pas
¢
In
case
the
entered
code
is
incorrect,
the
unit
|
does
not
enter
the
wait
state
but
return
to
the
CODE 12 8- initial display of the code request mode and the
code should be entered from the beginning.
fare le l-
a ne Code cancellation mode (simplified code)
CODE 1 2 3- Even after the security code has been registered, the
4 security function can be deactivated.
AHH EEE eee o
ROE 124-
CODE 12428 @ Operation description
¢ In the code request mode, press and hold the
When ie 4th digits have been entered + keys for 3 seconds to enter
the code cancellation mode.
e Enter "KCAR" from the remote control unit.
These characters should be displayed.
Code cancellation mode procedure (The code is
KCAR.)
|) Kisset
2 i
3) Press and hold the CLK key for 3 seconds: - -
Completion of code entry.
RE-ENTER
CODE - - - -
4 ) Enter the code again in the same way as step 2.
5) Press and hold the CLK key for 3 seconds: - -
Completion of code entry.
Ag
oe
The previous source is recalled and the
code is permitted
* To quit this mode in the middle (before the end
of step 2), simply turn power OFF. The same
operation can be restarted from step 1.
* Be sure to follow the above procedure. Note
that the code cannot be entered if the panel is in
the ejected position.
| Asset Cd
| Lz}twice [Risse Cd
Cancellation OK, display ceared.
| es Restart. CODE---- displayed.
Ais selected
7
13

KRC-758R/803/858R/CW
/883W/903/953/958R/993
MECHANISM OPERATION DESCRIPTION
NOTES FOR ASSEMBLING THE SRM CHASSIS ASSY 1 (L)
MECHANISM
(1) Assembly of Chassis ass'y 1 (L) or Chassis
ass'y 1 (R)
When assembling Chassis caulking ass'y (A),
Arm ass'y (B) and Gear ass'y (C) of Chassis Hole (c)
ass'y 1 (L) or (R), special care is required for
the positioning of every gear.
As shown in the illustration, align holes (a)-(c)
and assemble so that shaft (x), holes (a)-(c),
shaft (y) and tongue (z) form a straight line.
Maintain the alignment of holes (a)-(c) during
the assembly work by passing a thin stick (with
a diameter of about 1.3 mm) such as the shaft CHASSIS ASSY 1 (R)
of a fine watchmaker's screwdriver through the . : 1
holes. Spring (D) should be removed before the Chassis caulking ass'y (A)
assembly work and attached again after it.
Gear ass'y (C)
Arm ass'y (B)
Chassis caulking
S> ass'y (A)
G REP # i
y 28)
Hole (b)
D>
Hole (a)
Spring (D)
CHASSIS
ASSY
1
(R)
Hole
(c)
Spring (D)
Tongue (z)
Tongue (E)
Holes (a)-(c)
(2) Assembly of Chassis ass'y 2 (L) or Chassis
ass'y 2 (R)
Assemble Chassis ass'y 1 (L) or (R), Chassis
rebet ass'y (L) or (R), Collar and Gear with the
position relationship as shown in the following
illustration.
CHASSIS ASSY 2 (L) . CHASSIS ASSY 2 (R)
Chassis ribet ass'y (L) Chassis ass'y 1 (R)
14
Collar

KRC-758R/803/858R/C/W
/883W/903/953/958R/993
MECHANISM OPERATION DESCRIPTION
(3) Assembly of Chassis ass'y 2 (L), Chassis
ass'y 2 (R) onto Chassis ass'y (C)
When assembling these ass'ies together, the
gears of Chassis ass'y 2 (L) and Chassis ass'y
2 (R) should be in the same position on each
ass'y.
Similarly to (1) above, pass a thin screwdriver
shaft through holes (a)-(c) of each of Chassis
ass'y 2 (L) and Chassis ass'y 2 (R), and attach
them onto Chassis ass'y (C).
(4) Assembly of FPC (Flexible PC board) onto
Roller ass'y
Turn Roller ass'y by 4 turns.
Ensure that the white painting on the spring
draws a single straight line.
Hook tongue (1) of Roller ass'y to tongue (2).
Insert the FPC into the slit of Roller ass'y then
release tongues (1) and (2) of Roller ass'y.
15

KRC-758R/803/858R/CW
/883W/903/953/958R/993
ADJUSTMENT
KRC-803/883W/903/953/993
Set the controls and switches as follows.
BALANCE center position BASS — :center position LOUD :OFF DOLBY NR :OFF
FADER _ :center position © TREBLE ‘center position METAL :OFF
TUNER
INPUT SETTINGS panes (RECEIVER) getty ALIGN FOR
SETTINGS
FM SECTION
(A)
DISCRI-
98.1MHz
eee
-
ant
EM
MINATOR Odev
98.1MHz
14
60dB UU (ANT input) O14)
(C)
98.1MHz
1kHz,
=
67kHz
dev
EM
.
Pilot:
+
7.5kHz
dev
98.1MHz
Separation
10dB
Selector:L or R
ieee U (ANT input)
AM SECTION
(D)
SEEK STOP 990 kHz AM AM SD VR
LEVEL 0% mod 990 kHz (A1)
35dB HU (ANT input)
SSETTE DECK SECTION
(1)
: Adjust the azimuth for each
AZIMUTH TCC-153 (8) Head Azimuth
10kHz
TAPE
PLAY
Lch/Rch
or
FWD/RVS
becomes maximum
Screw
.
PLAY BACK Connect an VR1 (L)
ek TCC-130 AC voltmeter to | TAPE PLAY VR2 (R)
CN10 (X14) (X14)

KRC-758R/858R/C/W/958R
Set the controls and switches as follows.
BALANCE center position
:center position
FADER
ITEM
BASS
INPUT SETTINGS
:center position
TREBLE center position
OUTPUT
SETTINGS
TUNER
(RECEIVER)
SETTINGS
KRC-758R/803/858R/C/W
ADJUSTMENT
/889WW/903/953/958R/993
LOUD :OFF DOLBY NR :OFF
METAL :OFF
ALIGNMENT
POINTS
ALIGN FOR
SECTION
DISCRI-
MINATOR
(A)
98.1MHz
Odev
60dB LU (ANT input)
Connect a DC
voltmeter to
CN11
(X14)
FM
98.1MHz
(C)
98.1MHz
1kHz, = 40kHz dev
Pilot: £6 OkHz dev
Selector:L or R
35dB U (ANT input)
FM
98.1MHz
Separation 10dB
AM SECTION
SEEK STOP
() LEVEL
AZIMUTH
(D)
990 kHz
0% mod
35dB U (ANT input)
SSETTE DECK SECTION
TCC-153
10kHz
(B)
AM
990 kHz
AM SD VR
(A1)
TAPE PLAY
Head Azimuth
Screw
Adjust the azimuth for each
Lch/Rceh or FWD/RVS
becomes maximum
PLAY BACK
LEVEL
TOC-130
Connect an
AC voltmeter to
CN10 (X14)
TAPE PLAY
VAI (L)
VR2 (R)
(X14)
17

18
KRC-758R/803/858R/CW
/883W/903/953/958R/993
ABGLEICH
KRC-758R/858R/C/W/958R
Die Regler und Kndépfe wire folgt einstellen.
BALANCE :Mittelage
BASS _:Mittelage LOUD :OFF DOLBY NR :OFF
FADER :Mittelage § TREBLE :Mittelage METAL :OFF
NR | GEGENSTAND EINGANGS AUSGANGS
EINSTELLUNG EINSTELLUNG
TUNER
(RECEIVER)
EINSTELLUNG
ABGLEICH
PUNKTE ABGLEICHEN FUR
UKW-ABTEILUNG
(A) Den Gieichstrom
98.1MHz Voltmeter Diskri
0 Hub CN11 anschlieBen
60dB U (ANT-Eingang) (X14)
DISKRI-
MINATOR
FM 98.1MHz
(C)
98.1MHz
ANRC (SUCHEN | 1KHZ,=£ 40kHz Hub
HALT PEGEL) Pilot: £6.0kHz Hub
Wahler : Lor R
35dB U (ANT-Eingang)
MW-ABTEILUNG
FM 98.1MHz Trennung 10dB
(D)
990kHz
0% mod
35dB uU (ANT-Eingang)
CASSETTEN-DECK-ABTEILUNG
SUCHEN HALT
PEGEL
TCC-153
10kHz
AZIMUTH
PLAY BACK
LEVEL
Connect an
AC voltmeter
to CN10 (X14)
TCC-130
AM SD VR
(A1)
MW 990kHz
So einstellen, daB das
: Kopfazimuts- Azimuth fur jeweils
Bandwiedergabe | chvaube L-CH/R-CH oder
FWD/RVS maximal wird.
VR1 (L)
TAPE PLAY VR2 (R) 300mV
(X14)

CN7
DTA114EK
ee
DTA124EK
panedek
x14—4/2
as
DTA144EK
Al
<a
So
DTC114TK
nce
DTC114YK
K
ae
FM+B |(5)
DTC124EK DA204K
DTC144EK
2SC2412K
,
Se
:
2SC2413K
hye
2SD2114K
‘
a
2SK536
D
@)
‘
G ¢
S
noise
|@)
HA12134AF
SAA6579T
:
c
LPF
IQ)
8
:
3
2SB1277
'
|
ek
e
2SB1443
TDA7420
7
Ae
etd
Ae
ae
ee
;
CN11
A
R261
10
2SA1037K
an
TC4W66F
(
7
RDS
DEMODULATOR
5
CN9
8
[
ROATA
4
RQUAL
14)
BA6238A
RCLK
|@3)
!
Gnd
|@
t)
0.0
:
10
.
OSCILLATOR
hy
5
and
X14-A/2
:
:
f
DIVIDER
—CN8
(8th
ORDER)
-
CLOCK
NUM4565M-TE2
“Al
Se
acs
o4
eT
(B)
;
CLOCKED
}
"|
VARIABLE
AND
TEST
LoGic
|,
TEST
COMPARATOR
AND
OUTPUT
4
RN
O— 0)
FIRED
ONDER
SELECTOR
|Mooefo
|
SWITCH
RECONSTRUCTION
FILTER
Ic3 : NJM4565M—TE2
(C8 : SAABS79T KRC-958R__| X14—-5582-70 yes | 0.1 | 12k | 7.5K | 3.9K 72-0716
ley “LAV T4SM KRC-993 | x14—5880-21| NO | NO | 0.47 | 8.2K | 20K | 6.8K (72-0715
121,163,164 + 2802412K KRC-953 x14-5580-11] NO | Yes | 0.47 | 8.2K 6.8K 72-0715
Q122,162 + DTC1141K KRC—858R/C/Ww | X14—5582-71 Yes | 0.1 | 12K 72-0716
Q123 : DTA124EK KRC-803 x14-5580-12| NO | NO | 0.47 | 8.2K yes | (72-0715 | YES
Q161 : DTAT44EK KRC-903 x14-5580-13| No | Yes | 0.47 | 8.2K 8K L72-0715 | YES
S189 cries KRC—883W __|X14~5580-22| NO | NO | 0.47 | 8.2K 6.8K 172-0715
D121 EDANDOOK KRC-758R | X14—5582—72 : : 72-0716

AG
X14-A/2
—CN2
X14-A/2
—CN6
X14-A/2
—CN8
— = = A
CN7
GNO 18)
FIG)
GND 16)
Fu+B |(5)
PONS |(4)
NOISE |@)
R261 10
R IN
: NJM4565M—TE2
: HA12134AF
: SAA6579T
> LA1145M
IC3
ICS
IC8
IC13
Q121,163,164
Q122,162
Q123
Q161
Q165
0121
| ll
R179 560
R166 51K
*Ri63
We
C164 180P
: 2SC2412K
: DTC114TK
: DTA124EK
: DTA144EK
: 2SC2413K
: DAN202K
KRC-958R | X14—5582—70 yes | 0.1
KRC-993 x14-5580-21| NO | NO | 0.47 | 8.2K
KRC-953 X14—-5580-11| NO | YES | 0.47
FeRC=803_[xr4-5560-12] No | wo | 0.47 | 6.2K | 20K |
[erc=903_Jxr4s580-13] No] ves | 0.47 | 8.2K | 20K |
Krc-gesw _[x14—s580-22] No | no | 0.47 | 8.2K | 24K |
GLocKeD |}
Le COMPARATOR ‘eR FIXED DMDER zi
I RECONSTRUCTION
FILTER
RDS DEMODULATOR
TEST LOGIC
AND OUTPUT
SELECTOR
SWITCH
VARIABLE AND
L_No_| 172-0776 |
Pe.ax | no _| 172-0715 |
[wo [172-0716 |
Pe.ax | no _| 172-0715 |
Pe.ax | ves | 172-0718 |
3.x | no | u72-0716 |
AP
(X13-905X—XX)
Ki4
KIS
S6
a Gaaeeh eate
40 Iq '
cae
i
— : eeaparuaas, |
g a 8
x x x
IC1 : LC75853NE Q1,2 : DTAI14EK GND LINE
C2: LC75833E Q3,4 : 2S02114K +B LINE
IC3. : PAS—BO6B1FE D1-9 : B30-1349-05