Kenwood CT-401 User manual

STEREO DOUBLE CASSETTE DECK
CT-401/403
KXF-W1030/W1030-S
KXF-W3030/W3030E/W3030-S
SERVICE MANUAL © 2000-2/B51-5600-00 (K/K) 3473
70%
(dB)
– 50+3+6(dB)
DPSS
TAPE B
AUTO REVERSE
TAPE A
AUTO REVERSE
POWER
- ON – OFF
1
@#7@#7
¡18PAUSE ¶ REC/ARM ¡
REC LEVEL
MIN MAX
PUSH/OPEN
0
PUSH/OPEN
0
REV.MODE DOLBY NR DUBBING
DUBBINGDOLBY NR
∏pO
PEAK LEVEL METER
LINE IN
REC PLAY
LINE OUT
SYSTEM CONTROL
L
R
Power button *
(K27-) Cassette window (L) (B03-3862-08)
Volume knob *
(K27-)
LED window
(B03-3865-08)
Cassette window (R)
(B03-3863-08)
Player button (L) *
(K27-) Cassette door (L) * (A53-) Front panel * (A60-) Cassette door (R) * (A53-) Player button (R) * (K27-)
AC power cord *
(E30-)
RCA jack
(E11-0917-08) Phone jack (E11-0918-08)
* Illustration is CT-403/KXF-W3030.
* Refer to parts list on page 13.
Metallic cabinet *
(A01-)

Audio
(E30-0505-05)
cord.................... (2) AC
(E03-0115-05)
plug adaptor........... (1)
System
(E30-2816-05)
control cord ... (1)
(Except for Europe and Australia)
For the unit with an European AC
plug in areas other than Europe.
CT-401/403/KXF-W1030/W3030
2
CONTENTS / ACCESSORIES
CONTROLS
CONTENTS / ACCESSORIES .................................. 2
CONTROLS................................................................2
CIRCUIT DESCRIPTION............................................3
ADJUSTMENT............................................................4
PC BOARD ................................................................ 5
SCHEMATIC DIAGRAM............................................ 7
EXPLODED VIEW ....................................................12
PARTS LIST..............................................................13
SPECIFICATIONS ......................................Back cover
Contents
Accessories
DISPLAY
DOLBY NR reference level
(dB)
— 50+3+6(dB)
DPSS
TAPE B TAPE A
POWER
- ON – OFF
1
37 37
¡18
PAUSE ¶ REC/ARM ¡
RECLEVEL
MIN MAX
PUSH/OPEN
0
PUSH/OPEN
0
DOLBY NR DUBBING
DUBBINGDOLBYNR
(dB)
—
50 +3 +6 (dB)
DUBBINGDOLBY NR
PEAK LEVEL METER
PEAK LEVEL METER
FULL LOGIC CONTROL FULL LOGIC CONTROL
21 0
34 567
89
!@
DISPLAY
1Deck A
Playback-only tape deck.
2POWER switch:
Press to turn power -ON and –OFF.
3Deck A operation keys
3key :
Play key.
1key:
Rewind key. (for fast winding of tape
toward the left reel seen from you)
33 key:
Fast forward key (for fast winding of
tape toward the right reel seen from
you)
7key:
Stop key.
4Cassette holder (Deck A)
Press the area marked "PUSH/OPEN
0"to load or eject a tape.
5Cassette holder (Deck B)
Press the area marked "PUSH/OPEN
0"to load or eject a tape.
6Deck B operation keys
3key :
Play key.
1key:
Rewind key (for fast winding of tape
toward the left reel seen from you)
33 key:
Fast forward key (for fast winding of
tape toward the right reel seen from
you)
7key:
Stop key
¶REC/ARM key:
Press in stop mode to start recording
or press in record mode to let the
recording pause after leaving a non-
recorded blank of 4 seconds.
indicator : (Recording indicator)
8PAUSE key:
Press to let recording pause temporarily.
7REC LEVEL control:
Adjusts the recording level.
8DUBBING key:
Press to start tape dubbing.
9DOLBY NR key:
Pressto selecttheDolbyNoiseReduction
mode.
0Deck B
Tape deck which is capable of both
playback and recording.
!DOLBY NR indicator
@DUBBING indicator
1Deck A
Playback-only tape deck.
2POWER switch:
Press to turn power -ON and –OFF.
3Deck A operation keys / indicators
@ , # keys : (Play keys)
@ , # indicators : (direction indicators)
Tapes are played in the directions
indicatedby theirrespective indicators.
1key:
Rewind key (for fast winding of tape
toward the left reel seen from you)
33 key:
Fast forward key (for fast winding of
tape toward the right reel seen from
you)
7key:
Stop key
4Cassette holder (Deck A)
Press the area marked "PUSH/OPEN
0"to load or eject a tape.
5Cassette holder (Deck B)
Press the area marked "PUSH/OPEN
0"to load or eject a tape.
6Deck B operation keys
@ , # keys : (Play keys)
@ , # indicators : (direction indicators)
Tapes are played in the directions
indicatedby theirrespective indicators.
1key:
Rewind key (for fast winding of tape
toward the left reel seen from you)
33 key:
Fast forward key (for fast winding of
tape toward the right reel seen from
you)
7key:
Stop key
¶REC/ARM key:
Press in stop mode to start recording
or press in record mode to let the
recording pause after leaving a non-
recorded blank of 4 seconds.
indicator : (Recording indicator)
8PAUSE key:
Press to let recording pause temporarily.
7REC LEVEL control:
Adjusts the recording level.
8DOLBY NR key:
Pressto selectthe DolbyNoiseReduction
mode.
9DUBBING key:
Press to select the DUBBING mode.
0REV.MODE key:
Press to select the REVERS mode.
!Deck B
This deck is capable of both playback and
recording.
@Reverse mode indicators
#DOLBY NR indicator
$DUBBING indicator
DISPLAY
DOLBY NR reference level
DISPLAY
(dB)
— 50+3+6(dB)
DPSS
TAPE B
AUTO REVERSE
TAPE A
AUTO REVERSE
POWER
- ON – OFF
1
@#7@#7
¡18 PAUSE ¶ REC/ARM ¡
RECLEVEL
MIN MAX
PUSH/OPEN
0
PUSH/OPEN
0
REV.MODE DOLBY NR DUBBING
DUBBINGDOLBYNR
∏pO
(dB)
— 50 +3 +6 (dB)
DUBBINGDOLBY NR
∏pO
2
34 567
8
90
@#$
1 !
PEAK LEVEL METER
PEAK LEVEL METER
CT-401/KXF-W1030 CT-403/KXF-W3030

Pin No. Pin Name I/O Description Active
HL
1 AC-CHK I Power failure input. AC on AC off
2,3 VSS I Connected to ground.
4 SYS-DATA I System control data in.
5 SYS-BUSY I/O System control busy output.
6 DOLBY O Dolby NR output. off on
7 METER-GAIN O Meter amplifier gain control. other DPSS
8 REC/PB O Dolby NR REC/PB control. PB REC
9 PB-EQ/NORMAL O PB EQ. switch control. 70u 120u
10 REC-EQ-TYPE 1 O Rec EQ. switch (TYPE 1) control.
11 REC-EQ-TYPE 2 O Rec EQ. switch (TYPE 2) control.
12 SYS-DO O Connected with system data.
13 LED-A-FWD PLAY O LED control port of A FWD PLAY.
14 LED-A-REV PLAY O LED control port of A REV PLAY.
15 LED-B-REV PLAY O LED control port of B REV PLAY.
16-20 NC - Unused.
21 SOL-A O A deck solenoid control.
22 SOL-B O B deck solenoid control.
23 VSS - Connected to ground.
24 VDD - Power supply(+5.0v).
25 MECHA-VCC - Control port of power supply for deck. Play Stop
26 REC O Control port of REC/PLAY. Rec Other
27 REC-MUTE O Muting control port for recording. Other Rec
28 A/B O Control port of A or B deck. A play Other
29 DUBBING O Unused.
30 BIAS O Bias control port. Other Rec
31 INPUT-MUT O Input muting control. off on
32 LINE-MUTE O Line muting control. off on
33 A-REEL I Reel puls input of A deck.
34 HALF-SW I Half switch input of A deck.
35 A-MODE-SW I Mode switch input of A deck. Stop Play
36 B-REEL I Reel puls input of B deck.
37 B-HALF-SW I Half switch input of B deck.
38 B-MODE-SW I Mode switch input of B deck.
39 B-REC-FWD-SW I Forward rec detection switch input.
40 B-REC-REV-SW I Reverse rec detection switch input.
41 DO O Data output to IC601(BU2099FV).
42 SI - Unused.
43 CLK O Clock output to IC601(BU2099FV).
44 LCK O IC601(BU2099FV) LCK.
45 OE O IC601(BU2099FV) OE.
46 NC - Unused.
47 SDA O EE PROM(IC304) SDA.
48 SCL O EE PROM(IC304) SCL.
49 NC - Unused.
50 RESET I Reset signal input.
51 VDD - Power supply(+5.0v).
52 NC - Unused.
53 VSS - Connected to ground.
54 CF 6.0 MHz - Main system clock.
55 CF- 6.0 MHz - Main system clock.
56 VDD - Power supply(+5.0v).
57-59 K1-K3 I Key(1-3) input.
60 MODE-SW I Mode switch input.
61 NC - Unused.
62 A-CRO2 I A CrO2 switch input. CrO2 Nor
63 B-CRO2 I B CrO2 switch input. CrO2 Nor
64 METER I Input port of level meter.
1. Pin description of microprocessor. LC865612A(IC302)
CT-401/403/KXF-W1030/W3030
3
CIRCUIT DESCRIPTION
2. Pin description of LED driver. ( BU2099FV ,IC601) 3. Key matrix
Pin No. Pin Name Description Active Remarks Port SW1 SW2 SW3 SW4 SW5 SW6
HL K1 A FWD * A REV A A A -
6 L1 Level Meter X (Pin 57) PLAY PLAY STOP FF REW
7 L2 Level Meter X K2 B FWD * B REV B B B REC/
8 L3 Level Meter X (Pin 58) PLAY PLAY STOP FF REW ARM
9 L4 Level Meter X K3 * REV. DUBBING DOLBY B --
10 L5 Level Meter X (Pin 59) MODE NR PAUSE
11 A-REV 1 WAY/1WAY X W3030 only * KXF-W3030 only
12 B 1WAY/REV X W3030 only ( ) u-COM port
13 C REV/REV X W3030 only
14 B-FWD B-FWD X W3030 only
15 REC REC LED X
16 NR DOLBY NR LED off on
17 DUBBING DUBBING LED off on
: LED lights on X : LED lights off
4. Mode SW
Port SW1 SW2 SW3
(Pin 60) 1 WAY + 1 WAY 1 WAY + REV. REV. + REV.
( ) u-COM port

CN105
To Frequency counter
CT-401/403/KXF-W1030/W3030
4
ADJUSTMENT
(b) AZIMUTH ADJUSTMENT
(c)
(a) AZIMUTH ADJUSTMENT
SYSTEM CONNECTIONS
No. ITEM INPUT
SETTINGS OUTPUT SETTINGS CASSETTE DECK SETTINGS ALIGNMENT POINT ALIGN FOR FLG.
CASSETTE DECK SECTION TAPE: NORMAL, DOLBY: OFF, INPUT: LINE IN 0 dBs = 0.775 V
I. REC/PLAY HEAD
[ 1 ] DEMAGNET-
IZATION ––
POWER OFF
Remove the cassette door. REC/PLAY head Demagnetize the REC/PLAY
head with a head
demagnetizer.
[ 2 ] CLEANING –
––
–PLAY REC/PLAY
head, erase
head, capstan
pinch roller
Clean the REC/PLAY head,
erase head, capstan and
pinch roller using a cotton
swab slightly damped with
[ 3 ] AZIMUTH (A) MTT·114, TCC-153
0 kHz, -10 dB (B) PLAY Azimuth
adjustment
screw Maximum output. (a)
II. DC BOARD
[ 1 ] TAPE SPEED (A)
MTT-111, TCC-110
3 kHz (B) PLAY SFR301 Adjust the tape speed so
that a 3 kHz signal is
produced at the center of
(b)
(c)
III. PC BOARD
< 1 > PLAYBACK
LEVEL MTT-150
400 Hz (200 nWb) (B) PLAY DECK B
SFR101 (L)
SFR102 (R) Output level : ±1 dBs
< 2 >
< 3 > BIAS
REC BIAS
OSC
FREQUENCY Recording L107 105 kHz ±3 kHz
Record 1kHz and 10kHz in
alternation and playback.
Record and playback at
maximum REC volume
position.
CURRENT (A)
1 kHz, -20 dBs
10 kHz, -20 dBs (B) SFR105 (L)
SFR106 (R)
Record 1 kHz and 10 kHz in
alternation and adjust the
variable resistors which
control the bias current so
that the playback level
is obtained 0 dBs ±3 dBs.
< 4 >
RECORD
LEVEL (A) 1 kHz, -20 dBs (B) SFR107 (L) SFR108 (R) 0 dBs ±3 dBs
alcohol.
the tape.
LINE IN
REC PLAY
LINE OUT
SYSTEM CONTROL
L
R
(A) (B)
AC voltmeter AG Oscilloscope AC voltmeter
Frequency counter
KXF-W3030
KXF-W1030

ACEGIBDFHJ
2
1
3
5
7
4
6
1
1
1
I
I
G
G
O
I
1
15
16 1
1
15
2
2
9
1
110-120V 220-240V
110
20 11
9
GO
O
OGI
3
3
1 15
2
EB
EB
EB
EB
EB
EB
EB
115
2
21
31
EB
BE
BE
BE
BE
BE
BE
BE
BE
BE
BE
BE
BE
BE
LRLR
PLAY REC
AC SELECT SW
BE BE BE
BE
EB
EB
EB
EB
EB
EB
21
51
51
12
BE
BE
BE
13
3
3
1
47
SYSTEM
CONTROL LINE
OUT
POWER
REC LEVEL
LINE
IN
Refer to the schematic diagram for the value of resistors and capacitors.
PC BOARD(Component side view)
5 6