Kenwood CT-401-HU Service Manual

STEREO DOUBLE CASSETTE DECK

70%

(dB)

–

0+3+6(dB)

DPSS

TAPE B

AUTO REVERSE

TAPE A

AUTO REVERSE

POWER

- ON – OFF

@#7 @#7

¡ 18PAUSE ¶

REC/ARM

REC LEVEL

MIN MAX

PUSH/OPEN

REV.MODE DOLBY NR DUBBING

DUBBINGDOLBY NR

∏pO

PEAK LEVEL METER

LINE IN

REC PLAY

LINE OUT

SYSTEM CONTROL

CT-401/403 KXF-W1030/W1030-S KXF-W3030/W3030E/W3030-S

SERVICE MANUAL

Power button * (K27-)

Player button (L) * (K27-)

Cassette window (L) (B03-3862-08)

Cassette door (L) * (A53-)

Front panel * (A60-)

Cassette window (R) (B03-3863-08)

Cassette door (R) * (A53-)

Player button (R) * (K27-)

LED window (B03-3865-08)

Volume knob * (K27-)

Metallic cabinet * (A01-)

* Illustration is CT-403/KXF-W3030. * Refer to parts list on page 13.

RCA jack (E11-0917-08)

Phone jack (E11-0918-08)

AC power cord * (E30-)

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

DISPLAY

DOLBY NR reference level

(dB)

—

0+3+6(dB)

DPSS

TAPE

POWER

- ON – OFF

¡ 18

PAUSE¶REC/ARM

REC LEVEL

MIN MAX

PUSH/OPEN

DOLBY NR DUBBING

DUBBINGDOLBY NR

(dB)

—

0 +3 +6 (dB)

DUBBINGDOLBY NR

PEAK LEVEL METER

FULL LOGIC CONTROL FULL LOGIC CONTROL

21 0

34 567

DISPLAY

1 Deck A

Playback-only tape deck.

2 POWER switch:

Press to turn power - ON and – OFF.

3 Deck A operation keys

3 key :

Play key.

1 key:

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)

7 key:

Stop key.

4 Cassette holder (Deck A)

Press the area marked "PUSH/OPEN 0" to load or eject a tape.

5 Cassette holder (Deck B)

Press the area marked "PUSH/OPEN 0" to load or eject a tape.

6 Deck B operation keys

3 key :

Play key.

1 key:

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)

7 key:

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 nonrecorded blank of 4 seconds. indicator : (Recording indicator)

8PAUSE key:

Press to let recording pause temporarily.

7 REC LEVEL control:

Adjusts the recording level.

8 DUBBING key:

Press to start tape dubbing.

9 DOLBY NR key:

Press to select the Dolby Noise Reduction mode.

0 Deck B

Tape deck which is capable of both playback and recording.

! DOLBY NR indicator @ DUBBING indicator

1 Deck A

Playback-only tape deck.

2 POWER switch:

Press to turn power - ON and – OFF.

3 Deck A operation keys / indicators

@ , # keys : (Play keys) @ , # indicators : (direction indicators)

Tapes are played in the directions indicated by their respective indicators.

1 key:

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)

7 key:

Stop key

4 Cassette holder (Deck A)

Press the area marked "PUSH/OPEN 0" to load or eject a tape.

5 Cassette holder (Deck B)

Press the area marked "PUSH/OPEN 0" to load or eject a tape.

6 Deck B operation keys

@ , # keys : (Play keys) @ , # indicators : (direction indicators)

Tapes are played in the directions indicated by their respective indicators.

1 key:

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)

7 key:

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 nonrecorded blank of 4 seconds.

indicator : (Recording indicator)

8PAUSE key:

Press to let recording pause temporarily.

7 REC LEVEL control:

Adjusts the recording level.

8 DOLBY NR key:

Press to select the Dolby Noise Reduction mode.

9 DUBBING key:

Press to select the DUBBING mode.

0 REV.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)

—

0+3+6(dB)

DPSS

TAPE B

AUTO REVERSE

TAPE A

AUTO REVERSE

POWER

- ON – OFF

@#7 @#7

¡ 18

PAUSE¶REC/ARM

REC LEVEL

MIN MAX

PUSH/OPEN

REV.MODE DOLBY NR DUBBING

DUBBINGDOLBY NR

∏pO

(dB)

—

0 +3 +6 (dB)

DUBBINGDOLBY NR

∏pO

34 567

@#$

1 !

PEAK LEVEL METER

CONTENTS / ACCESSORIES

CONTENTS / ACCESSORIES .................................. 2

CONTROLS................................................................2

CIRCUIT DESCRIPTION............................................3

ADJUSTMENT............................................................4

PC BOARD ................................................................ 5

Accessories

SCHEMATIC DIAGRAM............................................ 7

EXPLODED VIEW ....................................................12

PARTS LIST..............................................................13

SPECIFICATIONS ......................................Back cover

CT-401/KXF-W1030 CT-403/KXF-W3030

CONTROLS

Pin No. Pin Name I/O Description

Active

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)

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

CIRCUIT DESCRIPTION

CT-401/403/KXF-W1030/W3030

CN105

To Frequency counter

CT-401/403/KXF-W1030/W3030

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

(A)

(B)

AC voltmeter AG

Oscilloscope

AC voltmeter

Frequency counter

ADJUSTMENT

SYSTEM CONNECTIONS

(b) AZIMUTH ADJUSTMENT

KXF-W3030

(a) AZIMUTH ADJUSTMENT

(c)

KXF-W1030

+ 9 hidden pages

Kenwood CT-401-HU Service Manual

CONTENTS / ACCESSORIES

Contents

Accessories

CT-401/KXF-W1030 CT-403/KXF-W3030

CONTROLS

CIRCUIT DESCRIPTION

adjustment