Kenwood KX-W8040 User manual

KX-W8040 lila
SERVICE
MANUAL
(1991-11 PRINTED IN JAPAN
B51-4467-00 (S) 4134
Cassette
lid
Escutcheon*
Panel
Metallic
cabinet
Knob
Escutcheon*
Cassette
lid
(A53-1335-04)
(BO7-)
(A60-0196-02)
(A01-1935-01)
(K29-4149-04)
(BO7-)
(A53-1335-04)
KENWOOD
ce
Knob
Dressing
pane!
=
Phone
jack
Knob
Knob
(K29-4141-03)
(A21-1790-03)
—§
(E11-0199-05)
(K29-4366-02)
(K29-4141-03)
Cassette
holder
ass'y
Knob
Cassette
holder
ass'y
(A53-1283-03)
(K29-4130-04)
(A53-1285-03)
AC
inlet
(E03-0102-25)
CAUTION t ATTENTION
RISK OF SLECTIMG SHICK {WSOC DE CHOC ELECTRMUE|
DU _NDT OPEN Ni PAS JUVE
Phono jack Miniature phone jack Foot
(E13-0445-05) (E11-0188-05) (J02-1034-05)
“Refer to parts list on pate 29.
Photo is KX-W8040Y type.

KX-W8040
CONTENTS
DISASSEMBLY FOR REPAIR ..........ccseecesseeeeereeees 3 PC BOARD sisesstcstensas Degiltranapehesa ise atop enetbesmetaasiuaee 19
BLOCK DIAGRAM sivisatcscvencsivesesesecnnsiteitncnsstyatuvacsues 4 SCHEMATIC DIAGRAM .........ccesssesesesssseeesseeeseees 21
CIRGUIE DESCRIP TION wccscnssoceietnasccaeusctentens rane 5 EXPLODED VIEW (MECHANISM) .......... cee 27
ADJUSTMENT ..0..ccecccceeesssestssscsesseneesssreneesseees 14 EXPLODED VIEW (UNIT) covcicsecctiticcs Giteaartveee 28
REGLAGE soseicccsis he Steak ca lenteissiticsealvnsersssvacetoeannescie 15 PART IST ssitctiacircn eciseaxguibenanniseataleniiess 29
ABGLEICH vases prsteretuiscinuscieccepocvanetvopnsaveceatsaesreenbetuas 16 SPECIFICATIONS. ccccsccesecuavatessanecense BACK COVER
WIRING DIAGRAM siissiscossincieversisedesctisssstsotnedantans 18
Accessories
Audio cord...... pe
(E30-0505-05) Instruction manual
B60-0777-00 (English)
System control cord...... 1 B60-0778-00 (French) P,E
(E30- 1392-05) B60-0779-00 (Chinese) M
B60-0780-00 (GE, Du, It) E
AG COM as cco inacj 045956 1 B60-0830-00 (Spanish) M
(Except for some areas.)
(The shape may vary de-
pending on the destination
Item carton case
area.) (E30-1305-15:Y) H50-0271-04
ae Prine itil ; Polystyren formd fixture
(Except
for
some
areas.)
FQ
H10-5101-12
For the unit with a Europe- ca
an AC plug in areas other oe H10-5102-12
than Europe. (E03-01 15-05)

KX-W8040
DISASSEMBLY FOR REPAIR
1. How to remove the front panel
@ Press the EJECT button to open the cassette
holder then remove the cassette lid.
Two claws of escutcheon pulling out side then
remove the escutcheon. (same of both deck)
@ Remove the four screws of bottom (@)
2. How to remove the mechanism
@®
Remove
the
four
screws
(@)
fxring
the
mechanism assembly

KX-W8040
BLOCK DIAGRAM
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KX-W8040
CIRCUIT DESCRIPTION
RECORD/PLAYBACK AMPLIFIER UNIT (X28-2310-10)
Parts Description
[Qi
28D1266(Q,
P)
|
+12V
AVR
eee
|
G2
|
2SA999(E,
F)
|
-22V
AVR
ae
sake
See
eee!
25C3940A
IAS
OSC
CONTROL
(A)
|
4
28C3940A__|
BIAS
OSC
CONTROL
(B)
fea,
<<
(OGh
|
6
C
:
i
C
i
Use/Function Operation/Condition/interchangeability
RS ae ee eee eee
ECHA(A) SOL CONT.
ECHA(B) SOL CONT.
UICK REV. AMP
Q11,
12
2SA933S(Q,R)
EVEL
AMP
LIMITTER
‘Controlled
by
Q5.
Since
the
level
amplifier
output
to
+5V.
ao
<
> < Be)
[7
POs 2SC1740S(Q,R)[ +12VAVR
momentarily when the power is switched on.
|
Q25~28
|
2SA933S(Q,R)
[PLAYOUTMUTING
|
ControlledbyQ39
ontrolled by Q38_ OFF: B REC
FL DRIVER ontrolled by Q42 and Q43
ontrolled by IC3 pin 5 OFF: A REC
ontrolled by IC3 pin 4 OFF: B REC
ontrolled by 1C4 pin12 OFF: AREC
ontrolled by IC4 pini3 OFF:BREC
ontrolled by IC1 pin 14
ontrolled by IC5 pin 4 OFF: High speed
ontrolled by IC5 pin i3 OFF: Hich speed
ontrolled by IC1 pins 10 and 11
ontrolled by IC4 pins 7 and2 OFF: A Normal
A-BIAS CONTROL
-BIAS CONTROL
-REC MUTING DRIVER
-REC MUTING DRIVER
LAY OUT MUTING DRIVER
| Q40.—S« | DTC124ES _—| A-CPM SPEED CONTROL
B-CPM SPEED CONTROL
FL, DRIVER
DTC124ES -NORMAL BIAS CONTROL
DTC124ES
-NORMAL
BIAS
CONTROL
ontrolled
by
IC4
pins
9
and
11
OFF:
B
Normal
C
C
C
C
C
C
C
C
C.
C.
C
C
IGH-DUBB MUTING DRIVER | Controlled by IC3 pin8 OFF: High speed onl
-EH BIAS OSC CONTROL __| Controlled by Q35 OFF: A REC
-EH BIAS OSC CONTROL _| Controlled by Q36 OFF: B REC
-BIAS(HX) CONTROL Controlled by Q35 OFF: A RES
-BIAS (HX) CONTROL Controlled by Q36 OFF: B REC
-HEAD R/P CONTROL Controlled by IC3 pin7 ON: A REC
-HEAD R/P CONTROL Controlled by IC3 pin6 ON: A REC
IGH SPEED HEAD EQ Controlled by IC3 pin8 OFF: High speed only
-BEQA/B
SW
Controlled
by
IC1
pin
13
OFF:
A
plaibaack
Ci
C
C
C
C
C
ontrolled by IC4 pin5 OFF: Recodimg
ontrolled by 1C4 pin1 ON:CCRSon!
ontrolled by IC4 pin 2 ON: Auto bas recording
ontrolled by IC4 pin4 ON: Dolby off
ontrolled by IC4 pin3 ON: Dolby 3
ontrolled by IC4 pin6 ON: Multipbx filter on
Controlled by IC4 pin5 ON: Dolby jlayback
| 56 | DTCI24ES | P-BEQR/P SW
| 57S | DTC124ES | NOR/CCRS SW
| asa | DTC124ES__ | NOR/OSC SW
[ass | DTC124ES__| DOLBY ON/OFF SW
Fa60 [| DTC124ES_| DOLBY B/C SW
PX ON OFF SW
OLBY R/P SW

KX-W8040
CIRCUIT DESCRIPTION
RECORD/PLAYBACK AMPLIFIER UNIT (X28-2310-10)
Use/Function Operation/Condition/Interchangeability
M50945-129SP
Eee
ie Peg ee
| IC3~5 | CxD1067P_—— | Extended VO |
| C6 | TC9213P_| Electronic volume control = |
| 1C7,8 [| UPC1297CA | DolbyHX-PROU |
| ic9,10_ | CxAiigssP_ | RECEQ)
ee ee
Pena a Ne os
a ara e!
i eee ae
Pe ene ee
| BA10393_—
ee
eae ed
A-REEL COMP. fg te ge el
BA10303____| B-REELCOMP._—=—Ssd|—SSSSCSCSCSCSCSSCC~*r
Piozi_ [tastes ——SC«dARPBEQSSCSC~dSC“‘SWOCOC~“‘“*
[icx2 [tastes _—-[BPBEQ SSCs SSSSCSCSCSSCC*r
ne
arena Se Sa
aad
Pr ee eee ee

KX-W8040
CIRCUIT DESCRIPTION
Micro processor (M50945-129SP)
Vref O- 1 Vcc
LEVEL L © 2 AVcc
a R Oo 3 P1
PHTA
4
es
PHSA 5 P3
PHTB O 6 P4
PHSB O 7 PS
QRA oO 8 P6
QRB © P7
P17 P8
G4 On P9
KR4 P10
A P11
LM P12
V CLK O< P13
V DATA c P14
V STB ¢ P15
EX RST P16
EX CLK cl G1
EX DATA 0«———— G2
EX STB Ox G3
CE G5
OSC OUT © Gé
S BUSY © G7
S DATA O< G8
NC G9
RESET Vp
Xin O——— KRO
Xout oO KR1
NC KR2
NC KR3
Vss NC

KX-W8040
CIRCUIT DESCRIPTION
Pin Description
Name
LEVEL L
LEVEL R
PHTA
PHSA
PHTB
M
M
M
PinNo.}| I/O
A/B switching output _H: B deck L: A deck
Line mute output H: MUTE OFF L: MUTE ON
_ = ant
|
f \X| DIM O|0 <
ala SP lass :
ive] ma
CLK
Extended IC clock output —ss—SSCSC‘“~*“‘~*~‘“‘~*~*~*~*~S~*S
Extended IC data output __—S—SC~—~—“—S~—SsSC‘“—SsSCSSS
Extended IC strobe output SSS
PAC off detection H:ACON LACOFFSSOS~—~SCS
[ 400-Hz/10-kHz output forautobias——SSCSC—C~—~S~—~S~SY
' Serial busy inputoutpat——SSSSSSSCSCSCS~—S
Serial data inpuvoutput_____—SSSSSSCSCSCS—CS—S
Connect to ground ———SSSSSCSC—~—SCSSY
nN
PO] PO} PO a/fajoa}/oa}/ojoa}aol{a]oajou
= O
iw)
O)NO, OOM Mmm <<<
OW} | M|] ><] ><] O<] O<| MD] OO
S519) (aigeiar |
>|< Sala
<
na 7)
XCIN Connect to GND.
Pin for clock pulses for time display
COUT OPEN. _ Pin for clock pulses for time display
PG@oundpin SY
ROPENS ot po ee
Key input _FEKEVON L:KEYORFE
"Key input H: KEY ON L:KEVOFF SSCS
wo
Key input H: KEY ON L: KEY OFF
Key input H: KEY ON L: KEY OFF
Connect to -30 V
High-voltage-resistant port pulldown voltage input
w
W] Wd] Ww] ca WIN] MIN
w
(00)
wo
DOI ODIQ OOOO) <j AAA] A] Zl <| x
09] 63] G1] | NI] Co] MBBS
1
Dd Banal Be ced Bd Pood Rael bd bo

KX-W8040
CIRCUIT DESCRIPTION
Pin Description
eee a ee UNO eS er
Fluorescent segment output n
Fluorescent segment output o
luorescent segment output p
Analog-to-digital converter power supply. Connect to backed-up +5V.
Power supply pin. Connect to backed-up +5V.
O
- ™N
rir
oO ie)
ain
= COIN
fo?)
° = = Ot hel
> <
S$ ro)
< cc

KX-W8040
CIRCUIT DESCRIPTION
/O EXPANDER (CXD1067P)
1/0 1
A
BIAS3
1
YDD
A
BIAS2
2
CLK
A
BIAS]
3
DATA
B
BIAS
4
-
STB
A
BIAS
5
RESET
B
R/P
6
SET
A
R/P
7
50
EQSP
8
Pl2
B
BIAS3
70u
9
Pll
B
BIAS2
1 P10 B BIAS1
1/0 2
CCRS/NOR
1
VDD
OSC/NOR 2 CLK
DOLBY
B/C
3
DATA
DOLBY
ON/OFF
4
STB
DOLBY
R/P
5
RESET
MPX
6
SET
A
METAL
7
SO
A
Cr02
8
P12
B
RECMUTE
B
METAL
9
Pid
A
RECMUTE
1 P10 B Cr02
be x3
A SOL 1
A HOLD 2
A CPK 3
A CSP 4
A RRW K)
A REF 6
B SOL 7
B
HOLD
8
B
CSP
B CPH 9
B
RRW
1 B REF
10