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