Kenwood KX-W894 User manual

STEREO DOUBLE CASSETTE DECK
KX-W894/W4060/W6060
SERVICE MANUAL |
KENWOOD
© 1994-4 PRINTED IN KOREA
B51-4850-00(K) 3696
(KX-W6060)
Badge(Logo)
(B43-0287-04)
Holdor glass Panel
(BO3-2893-04) (B60-0519-11)
Knob(EJECT)
Front glass
(K29-5858-14) (B03-2868-13)
Cassette holder Knob Knob
(A53-1455-12) (K29-5827-03) (K29-5824-02)
Phono jack
(E63-0046-15)
Foot*
(J02-)
Phone Jack Knob
(E11-0208-05)
Miniature phone jack
(E11-0188-05)
(K29-5828-04)
Metallic cabinet*
(A 01-)
Knob Holder glass
(K29-5826-03)
(B03-2893-04)
Knob Cassette holder*
(K29-5827-03) (A53-)
Slide switch
(S31-2131-05)
Power cord bushing
(J42-0083-05)
—e——_
AC power cord*
(E30-)
*Refer to parts list pa ge 21

KX-W8Q4W/4060W6060
CONTENTS/ACCESSORIES
CONTENTS
BLOCK
DIAGRAM
2:00:00
5
SCHEMATIC
DIAGRAM
0.200000.
0eeee
15
CIRCUIT
DESCRIPTION
2-02
seesnecen
6
EXPLODED
VIEW
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19
ADJUSTMENT
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c6s5ieec
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anicatates
10
PARTS
LIS
Tastes
eet
aman
21
WIRING
DIAGRAM.
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12
SPECIFICATIONS
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BACKCOVER
PC
BOARD
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13
ACCESSORIES
[Instruction
Manual]
(KX-W894)
B60-1425-00(ENGLISH) : K.P. Y,M, X, R
B60-1426-00(FRENCH) :P
B60-1427-00(CHINESE) :M
Audio cord
(E30-0615-05) : KX-W894
(E30-0505-05) : KX-W4060
: KX-W6060
B60-1428-00(SPANISH) : M.R
System control cord
(E30-2733-05)
(KX-W4060)
AC
plug
adaptor
B60-1425-00(ENGLISH)
:
K,
PY,
M,
X,
T,
E,
R
AE
SCEAEIO
Some
arene)
B60-1426-00(FRENCH)
:
P.
E
(For
the
unit
with
a
European
>
B60-1427-00(CHINESE)
:
M
AC plug in areas other than
Europe.)
(E03-0115-05)
B60-1428-00(SPANISH)
:™M,E,
R
B60-1429-00(GE, BU, IT): E
(KX-W6060)
B60-1420-O0(ENGLISH) : K, PY, M, X, T,E, R
B60-1421-00(FRENCH) : PE
B60-1422-00(CHINESE) :M
B60-1423-00(SPANISH) :M,E,R
B60-1424-00(GE, BU, IT): E

AX-WRS4
4060/6060
(KX-W894) Metallic Cabinet*
(A01-)
Holder glass _— Panel Knob(EJECT) ‘Front glass Escutcheon Holder glass
(B03-2893-04)
(A60-0521-11)
(K29-5858-14)
(B03-2869-13)
(BO7-2258-03)
(BO3-2893-04)
=
Cassette holder Foot Knob Knob Knob Knob Cassette holder
(A53-1463-12) (J02-0366-15) (K29-5827-03) (K29-5882-02) (K29-5828-04) (K29-5827-03) (A53-1461-12)
(KX-W4060) Metallic cabinet*
(A01-)
Holder glass Panel Knob(EJECT) Front glass Escutcheon Holder glass
(B03-2893-04) (A60-0520-11) = (K29-5858-14) (BO3-2869-13) (BO7-2258-03) (B0O3-2893-04)
Cassette holder Foot* Knob Knob Phone jack Knob Knob Cassette holder
(A53-1459-12) (J02-) (K29-5827-03) (K29-5825-02) (E11-0208-05) (K29-5828-04) (K29-5827-03) (A53-1457-12)
*Refer to parts list on page 21

KX-W8Q4 4060/6060
CONTROL AND OPERATIONS
Peak level meter
—-—-~
(Dolby
NR
reference
level)
Operation indicators - ---- Operation indicators
(Deck Al’ at ae onion a at a i fa { ae (Deck 8) he se
<4,» Direction indicators | = ~,--1!.57..-7)---=--77- lee Soe <4,» Direction indica-
DUBBING indi =
indicators -----~- Deck A counter | | | Deck B counter ® REC indicator
HIGH , NOR. rot Il PAUSE indicator
AUTO BIAS indicator | MPX indicator
STAND BY indicator | NORMAL DUBBING key
EJECT key EJECT key
HIGH
DUBBING
key
——---
—_——
|
|
ss
COUNTER
RESET
A/B keys
* KENWOOD)
HEREO DOUBLE CASSETTE OFCK KX W5EU6
CCAS MI treme
| ==
OAL ONLY A
<a e ~
al ti tije
(a) oe)
‘a ae
Hix PRO
|
Fast reverse |Stop key @
key <<
Fast forward
es key =
key im.
Play keys <«, > Play keys «, >.
Fast forward key >>!
Fast reverse key «<<
TIMER switch
REC LEVEL/BAL. (BALANCE)/BIAS knob
POWER switch
MODE key
DOLBY
NR
switch
---——_-__
PHONES jack
DIRECTION
switch
Connect
headphones
plug
te
this
jack
INDEX SCAN key CCRS key AUTO BIAS key REC/ARM key e.
| ! |
(
' \
\
1
f
‘
ae ea
; ee | ‘
t '
: MPX FILTER AUTO BIAS WREC PAUSE] @REC/ARM \
\
. \
\
1
\
\
'
1
!
I
!
!
| |
!
1
:
MPX FILTER key REY PAUSE key i u
[pte inde ap SaaS AE Sees bea ei SO in i a ee
]
_
STAND
BY
mode
of
POWER
switch
|
|
|
When
the
power
cord
of
thas
unt
is
plugged
into
an
AC
outlet,
the
STAND
BY
indicator
ights
up
regardless
st
the
ON/OFF
setting
of
the
POWER
switch.
This
mdicates
that
a
small
amount
of
current
1s
being
Supplied
to
the
unit
to
back
up
the
memory
contents
This
mode
is
|
| referred to au the Stand By micae

S Pr.)
= S
=
S3
= Ss
BLOCK DIAGRAM
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ZHSLE

KX-We94W4060W6060
CIRCUIT DESCRIPTION
Microprocessor[CXP82540-105Q]
IC2
Pin Connection
x
32
ont
mane
>
5
2
.
=
<
=
iw
topo ee eSees Sua
FelMod cet ae A Wee eels Beles
65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 \
FLG7 <— |64 1\— Cr02B
FLG8 <— |63 2|— BINHF
FLSeg15 <— |62 3|—— BINHR
FLSeg 1 <— |61 4|— NOR/A.BIAS
FL Seg 9 <— |60 5|—> OSC OUT
FL Seg 2 <— |59 6|<> S.BUSY
FLSeg10 «<— |58 7|<> S.DATA
FL
Seg
6
<—
|57
8|—
CLK
FL
Seg11
<—
|56
(e)
9|-—>
STB
|
System
IC
FL
Seg
7
<—
[55
a
10|—>
DATA
FLSeg17
<—
|54
=
11)»
B
MECHA.
BIAS
FLSeg
8
<—
|53
=
12|—»
READ
FL
Seg
3
<—
|52
i
13|—>
400/12.5K
FLSeg14
«—
|51
©
14|<+
E2PROM
DATA
FLSeg
3
<—
|50
7
15
|<»
E2PROM
CLK
FLSeg
5
«<—
|49
O
16
|<—
CW
FLSegi2
<—
|48
17|}«—
CCW
|
ENCODEL
FL
Seg
16
<—
|47
18
|}<—
PHA
FL
Seg
4
<—
|46
19
|«-—
PHB
BMECHA
<—
|45
20
|
R.MUTE
BMECHAR/P
«<—
|44
21|—»
L.MUTE
PLAY
A/B
<—
|43
22
|«—
LEVEL.R
INPUT
MUTE
<—
/42
23
|«—
LEVEL.L
7OHSP
<—
{41
24|<—
K3
| 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 |
VEE ded ted i aye
SRESHESRs
ERE
ERY
*
2 Kime s &
as
Cr
A MECHA :
B MECHA |

KX-W8Q4W4060/6060
CIRCUIT DESCRIPTION
Pin Connection
Pin No. _ YO Name Description _
1 | Cro2 B B-mechanism Cr02 tape detection H: Cr O2 3
2 | B INH.F B-mechanism FWD recording prohibition detection H: PROHIBITION _
3 | B INH.R B-mechanism RVS recording prohibition detection H : PROHIBITION
4 O NOR/A.BIAS OS C attenuator L: ON
5 O OSC OUT 400/12.5KHz rectangle wave output
6 VO S.BUSY Serial BUSY input/output
7 YO S.DATA Serial data input/output
8 O CLK System IC clock output a i
9 o | STB System IC strobe signal input
0
O
DATA
System
IC
serial
data
output
_
-
11 O B MECHA. BIAS B BIAS ON/OFF control H: ON
12 e) READ Read 12.5KHz H:ON -
13 O 400/12.5K Rectangle wave filter selector L : 400Hz
14 YO E2P DATA E2PROM DATA input/output
15 VO E2P CLK E2PROM CLOCK input/output
16 | ENCODER CW Encoder clock signal input H : RETURN
17 | ENCODER CCW Encoder clock signal input H : RETURN
18 | PHA A-mechanism rotation detection input :
19 | PHB B-mechanism rotation detection input _
20
O
R
MUTE
REC
MUTE
CONTROL
hae
21 O LMUTE LINE MUT CONTROL -
22 | LEVEL R CCRS, DPSS Rch signal input L:ON
23 | LEVEL L CCRS, DPSS Lch signal input L:ON
24 I A MECHA KEY{K3) Action key input
25
|
CENTER
KEY(K2)
Action
key
input
7
26 | B MECHA KEY{(K1) Action key input
27 || TIMER SW Slide switch input
28 I DOLBY SW Slide switch input -
29 | DIR SW = Slide_switch input ers :
30 | RESET Reset signal input L: RESET
31~32 | EXTAL, XTAL Clock oscillator connection terminal(10 MHz) |
33 | Vs GND =
34 ie) SOLA A-Solenoid contro! H: ON
35 O CPMA A-Capstan motor control H: ON
36 O CSPA A-Capstan motor switching H : NORMAL L: HIGH SPEED
37 O SOLB dt B-Solenoid contro! H: ON
| 38 O_ | CPMB B-Capstan motor control H: ON
39 oO CSPB B-Capstan motor switching H : NORMAL L: HIGH SPEED
40 QO | 70NSP EQ SP NORMAL & BIAS 70%s H:ON
41 oO 70 HSP EQ SP HIGH & BIAS 70#s H:ON
42 O INPUT MUTE Outside input MUTE switching H: ON
43 0 PLAY AVB AJB HEAD switching H : BHEAD ON
44 ie] B MECHA R/P- B REC/PLAY switching H : REC
45 O B MECHA ERASE -[_B ERASE HEAD ON/OFF switching H: ON ]
46~62 O Seg 17~1 FL tube segment signal output H:ON
63~70 O Grid 8~1 FL tube grid signal output H: ON 7
71 VFDP FL tube driving voltage(-30V) H: ON
72 VDD Positive power supply terminal(+5V) _
73 NC Unusedi(pull up) Sen
74 | VERSION Model changeover L: KXWw894/W4060_ HH: KX-W6060 ;
75 | PLAY A A-mechanism head position detection L: PLAY |
76 | PACK A A-mechanism half detection L: Half present
77 | Cr02 A A-mechanism Cr02 tape detection H : Cr Oz
78 I CE Backup detection terminal L: BACK UP
79 I PLAY B B-mechanism head position L: PLAY
80 | PACK B B-mechanism half detection L: Half present

Pin Connection
CIRCUIT DESCRIPTION
KX-W8Q4W4060/W6060
Pin No. VO Name i Description _ -
1 | Cr02 B B-mechanism Cr02 tape detection H: Cr O2 as.
2 | B INH.F B-mechanism FWD recording prohibition detection 1: PROHIBITION
3 I B INH.R B-mechanism RVS recording prohibition detection : PROHIBITION
4 O NOR/A.BIAS OS C attenuator _L: ON
5 O OSC OUT 400/12.5KHz rectangle wave output
6 VO S.BUSY Serial BUSY input/output -
7 VO S.DATA |__ Serial data input/output
8 0 CLK System IC clock output |
9 e) STB System IC strobe signal input 7 |
10 O DATA System IC serial data output _
"1 0 B MECHA. BIAS B BIAS ON/OFF control ___H:ON
12 O READ Read 12.5KHz : H: ON A
13 O 400/12.5K Rectangle wave filter selector L : 400Hz
14 VO E2P DATA E2PROM DATA input/output -
15 /O E2P CLK E2PROM CLOCK input/output
16 | ENCODER CW Encoder clock signal input H: RETURN 7
17 | ENCODER CCW Encoder clock signal input H : RETURN
18 | PHA A-mechanism rotation detection input :
19 | PHB B-mechanism rotation detection input 7 -
20 O R MUTE REC MUTE CONTROL r er
| 21 O LC MUTE LINE MUT CONTROL
22 | LEVEL R CCRS, DPSS Rch signal input L:ON
23 | LEVEL L CCRS, DPSS Lch signal input __L:ON |
24 I A MECHA KEY(K3) Action key input
25 | CENTER KEY{K2) Action key input _
26 I B MECHA KEY(K1) Action key input
27 I TIMER SW Slide switch input
[ 28 I DOLBY SW. Slide switch input
29 I DIR SW Slide switch input a
30 | RESET Reset signal input L: RESET
31 ~32 | EXTAL, XTAL Clock oscillator connection terminal(10 MHz) -_
33 Vs GND 7
[34 O SOLA __|_AsSolenoid control H:ON _ |
35 O | CPMA A-Capstan motor control H: ON
| 36 O CSPA A-Capstan motor switching H : NORMAL L: HIGH SPEED
37 O SOLB |__B-Solenoid control H:ON 4d
38 Oo CPMB B-Capstan motor control H:ON
39 O CSPB B-Capstan motor switching H : NORMAL L: HIGH SPEED
40 O 70 NSP EQ SP NORMAL & BIAS 70s H:ON
4 L O | 70 HSP _ EQ SP HIGH & BIAS 704s H: ON |
42 O INPUT MUTE | Outside input MUTE switching H: ON
43 O PLAY AVB AJB HEAD switching H: B HEAD ON
44 O B MECHA R/P B REC/PLAY switching H: REC
45 O B MECHA ERASE B ERASE HEAD ON/OFF switching H:ON
A6~62 0 Seg 17~1 FL tube segment signal output H: ON
63~70 oO Grid 8~1 FL tube grid signal output H : ON
71 VEDP FL tube driving voltage(-30V) H:ON —
72 VDD Positive power supply terminal(+5V)
73
NC
Unused(pull
up)
re
74 | VERSION Model changeover L: KX-W894 /W4060 HH : KX-W6060
75 | PLAY A A-mechanism head position detection L: PLAY
76 | PACK A A-mechanism half detection L: Half present
77 | Cr02 A A-mechanism Cr02 tape detection H : Cr O2
78 | CE Backup detection terminal L: BACK UP
79 | PLAY B B-mechanism head position L: PLAY 5
80 | PACK B B-mechanism half detection L: Half present

KX-WWBS4W/4060(W6060
CIRCUIT DESCRIPTION
KX-W894/W4060( 74) pin PULL DOWN)
Function
Voltage. @K 1 K 2 K 3
Voltage ® ®
OV B POWER A
0.42V Bo LS A >
1.03V B > CCRS A 4
1.52V B € N.DUBB A hy»
2.00V B h»> H.DUBB A €
2.51V A.RST ee LV/BL
3.01V B.RST ——_. B @/11
3.50V ———~ ——_- B @
4.00V TEST2 M.ADJ TEST1
4.50V S16bit
5.00V OPEN OPEN OPEN
KX-W6060( 74)pin PULL UP)
Function
Voltage. K 1 K2
ss ae a @ @
OV B Sf POWER
0.42V Bo ILS
1.03V B > MPX
1.52V B 4 A.BIAS
2.00V B D> CCRS
2.51V A.RST H.DUBB LV/BL
3.01V B.RST De B @/11
3.50V N.DUBB —— B ®@
4.00V TEST2 M.ADJ TEST1
4.50V S16bit
5.00V OPEN OPEN OPEN
Slide switch(S26, $23, S24)
Function
Voltage. $26 $23 $24
of @~@ | @TIMER @DOLBY @ DIR
\
OV PLAY C GS
2.5V REC B —
5.0V OFF OFF D
The function mode of K1~K2 is change by the voltage value
(0~5V) of # -com port(K1~K3)
The function mode of slide switch (S26 S23 S24)is change
by the voltage value(0~5V) of » -com port G)~@9

KX-W8Q4W4060/W"6060
j
‘
:
:
:
3
CIRCUIT DESCRIPTION
Test Mode
The system enters this test mode when KS3(TP3) and KR10
(TP4) are shorted together with a diode and the AC power
plug connect to the AC outlet.
Cancel method : Press the REC pause key or disconnect the
AC power plug from the AC outlet.
(1) Lamp display : All the indicators turn on 500 ms after the
power is switched on and remain on for 1500ms.
(2) Mechanical switch display : Each switch state is displayed
on the level meter when the line muting signal is on.
~c = -25 -15 -9 -6 -3 0 +3 (dB)
(A) L | pest isihy 3
B OFF C HALF Cr O2
(B) R | Pea (iat), la)
2 5 cD HALF F.REC Cr:O2 R.REC
(3) The level meter lights when the mechanical switch is set
to ON. Deck A set to the left channel and deck B to the
right channel.
(4) Recording level : The recording level is changed to three
steps(-codB «> —25dB <> +3dB) with the HI-DUBB/NOR-
DUBB key.
(5) Twice speed reeerding : Recording is initiated at HIGH
speed with the |.SCAN Key.
(6)
4
SECONDS
RECORDING
|
Record
for
4
seconds,
retums
to
the
begining,
and
plays
|
back(can
be
repeated).
:
REC PLAY
RWD
(7) Playback speed switching : The tape is played back at high
speed in the forward direction by pressing the FF key.(The
Forward PLAY, Reverse PLAY, and RWD keys cannot be
used for playback.)
(8) Input level attenuation : The REC PAUSE mode is entered
by pressing the CCRS key. In this case, an attenuator is
activated so that the output is OdBm when a signal is
input.When deck A stops and deck B has a recordable
tape}