Sony RMT-V301 Service Manual

SLV-KS1

RMT-V301

SERVICE MANUAL

S MECHANISM

• Refer to the SERVICE MANUAL of VHS MECHANICAL
ADJUSTMENTS VI for MECHANICAL ADJUSTMENTS.
(9-921-647-11)

SPECIFICATIONS

System

Format VHS NTSC standard
Video recording system Rotary head helical scanning

Video heads Double azimuth four heads
Video signal NTSC color, EIA standards

General

Power requirements 120 V AC, 60 Hz
Power consumption

Operating temperature 5˚C to 40˚C (41˚F to 104˚F)

FM system

24 W (US, Canadian)
18 W (Mexican)

Canadian Model

Mexican Model

Dimensions Approx. 355 × 96 × 285.5 mm

Mass Approx. 3.6 kg (7lb 15oz)

Supplied accessories

Remote control (1)
Size AA (R6) batteries (2)
Audio/video cable (3-phono to 3-phono) (1)

Design and specifications are subject to change without
notice.

(w/h/d)
(Approx. 14 × 3

inches) including projecting
parts and controls

7

/8 × 11 1/

US Model

4

VIDEO CASSETTE RECORDER

SAFETY CHECK-OUT

After correcting the original service problem, perform the following
safety checks before releasing the set to the customer:

1. Check the area of your repair for unsoldered or poorly-sol­dered connections. Check the entire board surface for solder
splashes and bridges.

2. Check the interboard wiring to ensure that no wires are
“pinched” or contact high-wattage resistors.

3. Look for unauthorized replacement parts, particularly transis­tors, that were installed during a previous repair. Point them
out to the customer and recommend their replacement.

4. Look for parts which, though functioning, show obvious signs
of deterioration. Point them out to the customer and recom­mend their replacement.

5. Check the line cord for cracks and abrasion. Recommend the
replacement of any such line cord to the customer.

6. Check the B+ voltage to see it is at the values specified.

7. Check the antenna terminals, metal trim, “metallized” knobs,
screws, and all other exposed metal parts for AC leakage.
Check leakage as described below.

To Exposed Metal
Parts on Set

LEAKAGE TEST

The AC leakage from any exposed metal part to earth ground
and from all exposed metal parts to any exposed metal part having
a return to chassis, must not exceed 0.5 mA (500 microamperes).
Leakage current can be measured by any one of three methods.

1. A commercial leakage tester , such as the Simpson 229 or RCA

WT -540A. Follow the manufacturers' instructions to use these

instruments.

2. A battery-operated AC milliammeter. The Data Precision 245

digital multimeter is suitable for this job.

3. Measuring the voltage drop across a resistor by means of a

VOM or battery-operated AC voltmeter. The “limit” indica-

tion is 0.75V, so analog meters must have an accurate low-

voltage scale. The Simpson 250 and Sanwa SH-63Trd are ex-

amples of a passive VOM that is suitable. Nearly all battery

operated digital multimeters that have a 2V AC range are suit-

able. (See Fig. A)

AC

0.15 µF

1.5 k

Ω

Earth Ground

Voltmeter
(0.75 V)

Fig. A Using AC voltmeter to check AC leakage

SAFETY-RELATED COMPONENT WARNING!!

COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED
LINE WITH MARK 0 ON THE SCHEMA TIC DIAGRAMS
AND IN THE PARTS LIST ARE CRITICAL TO SAFE
OPERATION. REPLACE THESE COMPONENTS WITH
SONY PARTS WHOSE PART NUMBERS APPEAR AS
SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUB­LISHED BY SONY.

ATTENTION AU COMPOSANT AYANT RAPPORT

À LA SÉCURITÉ!

LES COMPOSANTS IDENTIFIÉS P AR UNE MARQUE 0
SUR LES DIAGRAMMES SCHÉMATIQUES ET LA LISTE
DES PIÈCES SONT CRITIQUES POUR LA SÉCURITÉ
DE FONCTIONNEMENT. NE REMPLACER CES COM­POSANTS QUE PAR DES PIÈCES SONY DONT LES
NUMÉROS SONT DONNÉS DANS CE MANUEL OU
DANS LES SUPPLÉMENTS PUBLIÉS PAR SONY.

– 2 –

TABLE OF CONTENTS

Section Title Page Section Title Page

SERVICE NOTE ...................................................................... 4

6. ADJUSTMENTS

1. GENERAL

Play Timer...................................................................... 1-1

Cassette Door Lock (Safety Lock) ................................ 1-1

Recording and Tape Speed Buttons ............................. 1-1

Connections .................................................................. 1-2

2. DISASSEMBLY

2-1. Upper Case Removal .................................................... 2-1

2-2. Front Panel Section Removal ....................................... 2-1

2-3. Rear Panel (M) Removal .............................................. 2-1

2-4. Mechanism Deck Removal ........................................... 2-1

2-5. MA-370 Board Removal................................................ 2-2

2-6. Internal Views ................................................................ 2-3

2-7. Circuit Boards Location ................................................. 2-4

3. BLOCK DIAGRAMS

3-1. Overall Block Diagram .................................................. 3-1

3-2. Video Block Diagram..................................................... 3-3

3-3. Servo/System Control Block Diagram .......................... 3-5

3-4. Audio Block Diagram..................................................... 3-7

3-5. Power Block Diagram.................................................... 3-9

4. PRINTED WIRING BOARDS AND
SCHEMATIC DIAGRAMS

6-1. Mechanical Adjustments ............................................... 6-1

6-2. Electrical Adjustments ................................................... 6-1

2-1. Pre-Adjustment Preparations........................................ 6-1

2-1-1. Instruments to be Used............................................ 6-1

2-1-2. Connection ............................................................... 6-1

2-1-3. Set-up of Adjustment ................................................ 6-1

2-1-4. Alignment Tapes....................................................... 6-1

2-1-5. Specified I/O Level and Impedance

input/output terminal ................................................ 6-1

2-1-6. Adjusting Sequence ................................................. 6-2

2-2. Power Supply Adjustment ............................................. 6-2

2-2-1. Power Supply Check................................................ 6-2

2-3. Servo System Adjustment............................................. 6-2

2-3-1. RF Switching Position Adjustment........................... 6-2

2-4. Audio System Adjustments ........................................... 6-3

2-4-1. Normal Audio System Adjustment ........................... 6-3

1. ACE Head Adjustment .................................................. 6-3

2. E-E Output Level Check ............................................... 6-3

3. Frequency Response Check......................................... 6-3

2-5. Parts Arrangement Diagram for Adjustments............... 6-4

7. REPAIR PARTS LIST

7-1. Exploded Views ............................................................. 7-1

7-1-1. Front Panel and Chassis Assembly ......................... 7-1

7-1-2. Mechanism Chassis Assembly (1) ........................... 7-2

7-1-3. Mechanism Chassis Assembly (2) ........................... 7-3

7-1-4. Mechanism Chassis Assembly (3) ........................... 7-4

7-2. Electrical Parts List........................................................ 7-5

4-1. Frame Schematic Diagram ........................................... 4-3

4-2. Printed Wiring Boards and Schematic Diagrams ......... 4-5

MA-370 Printed Wiring Board ....................................... 4-5

MA-370 (Head Amp) Schematic Diagram .................... 4-7

MA-370 (Video, Audio) Schematic Diagram................. 4-9

MA-370 (Servo/System Control)

Schematic Diagram ....................................................... 4-13

MA-370/QP-1 (Kids Sound) Printed Wiring Board

and Schematic Diagram................................................ 4-17

MA-370 (Mode Control) Schematic Diagram ............... 4-19

MA-370 (Power Supply) Schematic Diagram ............... 4-21

5. INTERFACE, IC PIN FUNCTION DESCRIPTION

5-1. System Control-Video/RP Block Interface

(MA-370 BOARD IC160)............................................... 5-1

5-2. System Control-Servo Peripheral Circuit Interface

(MA-370 BOARD IC160)............................................... 5-1

5-3. System Control-Mechanism Block Interface

(MA-370 BOARD IC160)............................................... 5-2

5-4. System Control-System Control Peripheral

Circuit Interface (MA-370 BOARD IC160) .................... 5-3

5-5. System Control-Audio Block Interface

(MA-370 BOARD IC160)............................................... 5-3

5-6. Servo/System Control Microprocessor Pin Function

(MA-370 BOARD IC160)............................................... 5-4

– 3 –

SERVICE NOTE

1. DISASSEMBLY

• This set can be disassembled in the order shown below.

Note: Pages in indicated pages in the SERVICE MANUAL.

Pages in indicated pages in the VHS MECHANICAL ADJUSTMENT MANUAL VI.

Set

Upper Case
(Page 2-1)

Front Panel

Section

(Page 2-1)

FL Complete

Ass’y

(Page 13)

Retainer

Plate

(Page 22)

FL Slider

Block Ass’y

(Page 22)

Cam Gear

(Page 23)

Pinch Press

Block Ass’y

(Page 14)

Mechanism

Deck

(Page 2-1)

Rubber

Belt

(Page 15)

Capstan

Motor

(Page 15)

Cam Motor

Retainer

(Page 31)

Ground Shaft

Ass’y

(Page 13)

Drum
Ass’y

(Page 13)

Rubber

Belt

(Page 15)

Pully Gear

Ass’y

(Page 29)

Reel Direct

Ass’y

(Page 30)

Rear Panel

(M)

(Page 2-1)

MA-370

Board

(Page 2-2)

Rotary
Switch

(Page 2-1)

Tuner

Unit

Rubber

Belt

(Page 15)

Slider

(Page 26)

Loading

Gear (T, S)

(Page 28)

Cam Motor

(Page 31)

– 4 –

SECTION 1

GENERAL

SLV-KS1

This section is extracted from instruc­tion manual. (3-062-072-11)

Step Step

Step

Turn on your TV

D

O

O

R LO

CK

T

V

O

L

C

HV

TV/VIDEO

P

L

A

Y

F

F

ER

Insert your
tape here

PU

S

H

S

P/EP

RE

C

Play Timer

The Play Timer function allows you to control the amount of time your child watches a video. For
example, let’s say you want your child to watch a cartoon for 90 minutes.

Press the PLAY TIMER SET UP button for more than five seconds.

1

The set up screen appears on your TV.

Press the M (fast forward) or m (rewind) buttons to select 90

2

minutes.

The time will change in thirty minute increments. If you continue to
press either the M (fast forward) or m (rewind) button, the playing
time will scroll as follows:
OFF y 30 y 60 y 90 y 120 y 150 y 180 y OFF

After you select the playing time, press the PLAY TIMER SET UP button.

3

The ON/OFF row of the (repeat) option is highlighted.

Press the M (fast forward) or m (rewind) button to set the repeat function ON or OFF.

4

If you select ON and the tape reaches the end before the timer is up, it will automatically rewind
and play the tape from the beginning.

Press the PLAY TIMER SET UP button again.

5

The set up screen will disappear and the timer will start. Follow the steps above to start
watching a video.

When your child is watching a video, all of the buttons (except the z REC (record) button) will
work. After the set playing time has elapsed, the power will turn off and all of the buttons will be
locked for one hour. If you press a button while the VCR is locked, the light on the POWER I/1
button will flash for five seconds.

To check the remaining time

Press the PLAY TIMER SET UP button once. The remaining time will appear on your TV screen.
When five minutes are left, the remaining time will automatically appear on your TV screen for 30
seconds.

To cancel the Play Timer

Press the PLAY TIMER SET UP button for more than five seconds. When the set up screen appears
on your TV, use the M (fast forward) or m (rewind) buttons to set the timer to OFF.

Notes

• As soon as you complete step 5 above, the timer will start to run even if you turn off the VCR. This means that the VCR
may enter the lock mode while the power is off, or that when you turn the VCR back on, the Play Timer will return to
the last setting you made. Follow the explanations above to change or cancel the Play Timer.

• The repeat function will rewind the tape no more than five times, regardless of the tape length or timer setting.

Cassette Door Lock (Safety Lock)

You can lock the cassette door to prevent your child from inserting or ejecting
cassette tapes. To lock the door, press down the PUSH button and move the
DOOR LOCK slide to the left until it clicks in place.

To unlock the door, press down the PUSH button and move the DOOR LOCK
slide to the right.

Recording and Tape Speed Buttons

You can use this VCR to record images input through the LINE IN jacks. For example, let’s say you
want to record images of your child that you took with your video camera.

Press the SP/EP button to set the tape speed.

1

EP (Extended Play) provides recording time three times as long as SP (Standard Play).
However, SP produces better picture and audio quality.

Connect your video camera’s LINE OUT jacks to the LINE IN jacks on the back of this

2

VCR, and insert a blank tape with its safety tab intact into this VCR. (If you are recording
a program on your TV, be sure to disconnect the VCR’s LINE OUT jacks from your TV’s
LINE IN jack and set the TV’s TV/VIDEO button to TV.)

Press the z REC (record) button on this VCR.

3

Start playing the tape in your video camera.

4

The REC mark and tape speed (EP or SP) appear on your TV screen. To stop recording,
press x STOP.

Note

• The z REC button will not function when the Play Timer is activated. Cancel the Play Timer before you make a
recording.

and press your TV’s
TV/VIDEO* button

* The name of this button may be different

on your TV.

Press to
turn ON/
OFF

Press to
eject

N PLAY button

Press this button to play a tape.

m REW (rewind)
button

Press x STOP and
then this button to
rewind a tape. To
watch the picture in
fast motion, press this
button while the tape
is playing.

x STOP button

Press this button to stop the tape when it is
playing, rewinding, fast forwarding, or recording.

X PAUSE button

Press this button to momentarily stop the tape.

VOL +/– buttons:
These buttons change the
volume on your TV.

CH +/– buttons:
These buttons change the
channels on your TV.

TV I/1 (power) button:
Use this button to turn your TV
on and off.

TV/VIDEO button:
This button switches your TV
between regular TV programs
and the video input.

You must first program your remote
control to use the buttons 1 through
4 above (see below).

A playful animation will appear whenever you
rewind, fast forward, or insert a tape.

M FF (fast
forward) button

Press x STOP and
then this button to fast
forward a tape. To
watch the picture in
fast motion, press this
button while the tape
is playing.

Program your Remote Commander remote control!

You can set your remote control to control the power, channel, volume, and video input of your TV.
First find the manufacturer’s name of your TV. Then, while holding down the TV power button

(button TV I/1) on the remote control, press the operation buttons in the order shown in the chart.

Manufacturer

Sony

Akai/AOC/Emerson/Gold Star/
J.C.Penney/Marantz/MGA/
Mitsubishi/NEC/Philco/RCA/
War d s

Centurion/Curtis-Mathes/
Daytron/J.C.Penney/Magnavox/
MGA/Mitsubishi/NEC/Sampo/
Scott/Sylvania/Wards/York

Coronado/Emerson/Gold Star/
Hitachi/KMC/Magnavox/Philco/
Portland/Sharp/Teknika/Wards

Emerson/Radio Shack/Teknika

Fisher/Sanyo/Sears

General Electric/Panasonic/Quasar

POWER

DISPLAY button:
This button will turn on or off
the animations that appear
when you fast forward or
rewind a tape.

POWER /1 button:
Although this button turns the
VCR on and off, the VCR will
turn on automatically when
you insert a tape or press the

N PLAY, M FF, m REW,
z REC, or PLAY TIMER SET

UP buttons. The VCR will turn
off automatically if no buttons
are pressed for more than five
minutes after the tape is
stopped or ejected.

Press

N then x
N then X

M then x

N then m

m then N
M then N
x then m

PLA

Y TIM

ER

S

ET U

P

PAUSE DISPLA

V

ID

E

O

Inserting the batteries

Insert two size AA (R6) batteries by
matching the + and – on the batteries
to the diagram inside the battery
compartment.
Insert the negative (–) end first, then
push in and down until the positive
(+) end clicks into place.

Manufacturer

General Electric/RCA/Sears

Gold Star/MGA/Mitsubishi

Hitachi

JVC

Magnavox/Philips/Sylvania/
Teknika

Marantz/MGA/Mitsubishi

Panasonic

Pioneer

Quasar/Sharp

Radio Shack/Sharp

Sears/Toshiba

Zenith

REW

S

T

O

P

Y

m

POW

Press

M then X
X then N
N then M
M then m
x then N

m then X
X then M
m then M
X then x
x then M
x then X
m then x

Press to
play!

Press to
rewind

Press to
fast
forward

Press to

OFF

O N OFF

90MIN

O N OFF

PUSHDOOR LOCK

DOOR LOCK PUSH

1-1

Connections

Follow the steps below to connect your TV to the VCR.

VCR

Your TV

A

U

D

IO

(M

O

N

O

)

V

ID

E

U

T

1

VIDEO OUT

O

AUDIO IN R

2

A

U

D

IO

V

ID

R

L

1

VIDEO IN

AUDIO IN L

E

O

L

IN

E

IN

L

IN

E

O

2

AUDIO

3

to an AC outlet

Step 1

Using the supplied audio/video cable, connect one of the yellow plugs to VIDEO of LINE OUT on
this VCR, and the other yellow plug to VIDEO of LINE IN on your TV.

Step 2

Connect both of the red and white plugs, in any order, to the black AUDIO LINE OUT jacks on this
VCR, and the other ends to the AUDIO LINE IN jacks on your TV. If your TV is monaural (only one
AUDIO LINE IN jack), you only need to use one of the red or white plugs. Just be sure to connect
the same color plug to both the VCR and your TV.

Step 3

Plug in the power cord to an AC outlet.

Note

• If your TV only has an RF jack (antenna jack), you need to use an RF modulator (not supplied) to connect this VCR.

OUT

Refer to your modulator’s instruction manual for further details.

Using the LINE IN jacks

When you want to use this VCR to make a recording, connect
LINE IN on this VCR to LINE OUT of your other video source
(such as a video camera, TV, or another video deck) using an
audio/video cable (not supplied). If your other video source
has a stereo LINE OUT (three jacks), use the audio/video
cable VMC-910MS (sold separately). Play the original tape on
the other video source and use this VCR to make the
recording. See “

Note

• If you connect your TV’s LINE OUT jacks to the LINE IN jacks, be sure to disconnect the VCR’s LINE OUT jacks
from your TV’s LINE IN jacks.

Recording and Tape Speed Buttons” on the reverse for more information.

AUDIO IN

LINE IN

AUDIO

(M

O

N

O

)

VIDEO IN

VIDEO

1-21-2 E

SECTION 2

DISASSEMBLY

Note: Follow the disassembly procedure in the numerical order given.

2-1. UPPER CASE REMOVAL 2-3. REAR PANEL (M) REMOVAL

SLV-KS1

1 Two tapping screws

3 Upper case

2 Two tapping

screws

4 Claw

2 Harness

3 Claw

7 Rear panel (M)

6 Three claws

1 Power cord

(CN600)

5 Two claws

2-2. FRONT PANEL SECTION REMOVAL

5 Two claws

2 Claw

1 Claw

3 Claw

6 Front panel section

4 Claw

2-4. MECHANISM DECK REMOVAL

3 Flat cable

7 Screw

(BVTP3 × 12)

6 Claw

2 Flexible board

(FFM-001)

1 Connector

(FE head)

5 Screw

(B3)

4 Connector

(ACE head)

8 Screw

(BVTP3 × 12)

0 Mechanism

deck

9 Screw

(BVTP3 × 12)

2-1

Note: When mounting the mechanism deck,

first align mark on the rotary switch.

2-5. MA-370 BOARD REMOVAL

1 Five screws

(B3)

2 MA-370 board

2-2

2-6. INTERNAL VIEWS

Drum assembly (M901) (DZH-0A2A/Z-RP)
8-839-049-53

FE head
1-500-144-11

Q002
Tape top sensor
8-729-043-84

ACE head block assembly
A-6759-620-A

Q001
Tape end sensor
8-729-043-84

D001
Tape top/end LED
8-719-048-26

M902
Capstan motor
1-698-971-11

M903
Cam motor assembly
X-3947-577-1

Drum assembly (M901) (DZH-0A2A/Z-RP)
8-839-049-53

2-3

2-7. CIRCUIT BOARDS LOCATION

QP-1
(KIDS SOUND)

MA-370

HEAD AMP, VIDEO, AUDIO, I/O,
SERVO/SYSTEM CONTROL,

()

POWER SUPPLY, MODE CONTROL

2-4

2-4 E

SLV-KS1

M901

DRUM

MOTOR

M

DRUM MOTOR

D VS

(2/2)

IC160

DRUMPGDRUM

D FG

D PG

FG

M902

MOTOR

CAPSTAN

FG

M

CAPSTAN

CAPSTAN MOTOR

CAP FG

CAP VS

CTL

HEAD

CTL REC/PB

IC101

M903

CAM

MOTOR

LOADING

M

DRIVE

MOTOR

CAM +,-

S102

CAM

ENCODER

MODE1-4

SERVO/

SYSTEM

CONTROL

SW12V

T REEL FG

PH102

(T. REEL)

S REEL FG

PH101

(S. REEL)

T SENS

Q101

(T. SENS)

D103

(T/S. LED)

Q102

S SENS

(S. SENS)

Q103

LED

DRIVE

T/S LED

KEY

FUNCTION

FUNC KEY 2

KEY

FUNCTION

FUNC KEY 1

SECTION 3

BLOCK DIAGRAMS

(SEE PAGE 4-17)

IC999

QP-1 BOARD

MA-370 BOARD

(SEE PAGE 4-7,9,13,19,21)

(1/2)

IC201

KIDS SOUND

Y/C

CCD

PROCESS

IC160

DELAY

J562 (3/4)

Q561

Q500

(1/2)

LINE

OUT

VIDEO

BUFFER

RF VIDEO

BUFFER

OSD

AUDIO OUT

PLL CLOCK

PLL DATA

PLL ENB

PB Y/C

Q VD

Q VD

REC Y/C

I2C CLK

I2C DATA

C SYNC

HA SWP

HA SWP

RF ENV

RF SWP

RF ENV

RF SWP

SIGNAL

CONTROL

I2C CLK

I2C DATA

IC161

EEPROM

NORM OUT

(2/2)

IC201

AUDIO

NOMAL

IC162

PROCESS

POWER

FAIL DET

RESET

PULSE GEN

IC350

J562 (4/4)

HEAD

LINE

AUDIO

L

T380,Q380

SWITCH

OUT

(MONO)

R

BIAS

REMOCON

IC403

REMOTE

CONTROL

RECEIVER

3-1 3-2

OCS

3-1. OVERALL BLOCK DIAGRAM

L VIDEO 1

VIDEO

LINE

J562 (1/4)

AMP

VIDEO

IC260

REC/PB

DRUM

SP

IN

CH 1SPCH 2EPCH 1EPCH 2

L 1(L)

AUDIO

LINE

J562 (2/4)

L

(MONO)

IN

A HEAD PB

REC/

AUDIO

A HEAD REC

PB

HEAD

AUDIO

ERASE

HEAD

FULL

ERASE

05

HEAD

LINE

OUT

VIDEO

J562 (2/4)

PB

(H)

2.3Vp-p

IC160 ts

Q561

BUFFER

(H)

REC

2.2Vp-p

IC160 ts

Q500

(H)

BUFFER

2.3Vp-p

IC160 t; PB

IC160 t; REC

(H)

IC201 wl PB

2.3Vp-p

(H)

2.1Vp-p

IC201 wl REC

52

(1/3)

OSD V OUT

(H)

OSD

IC160

2.2Vp-p

REC/PB

IC160 th

IC201 ej REC

C VIDEO IN

OSD V IN
50

56

Q502

BUFFER

Q203

24

VIDEO

BUFFER

41

1H

DL

CLP

43 46 47

YNR

RP

LPF

P

R

FBC 1/2

Y/C

MIX

P

R

R

AGC

SYNC

(H)

2.0Vp-p

29

23

KIL

6dB

B.D

AMP

INS

CHARA

P

R

(H)

0.5Vp-p

IC201 wd PB

3237 31

(1/2)

CLP

IC201

CCD DELAY

Y/C PROCESS

(H)

1.0Vp-p

PIC

P

SEP

28

50

CCD_CLOCK_IN

CONT

5259

63

AMP

DL

1H/2H

55

5361

DL

EQ

LPF

INV

Q202

BPF1

P

R

BPF2

MAIN

COMV.

AMP

BACK UP

ACC

AMP

P

R

C

(V)

0.6Vp-p

IC201 1 PB

R

(3.579545MHz)

IC201 yj REC/PB

460mVp-p

X201

3.579545MHz

67

66

656260

VXO1

CLP

DE

EMPH

10 17

P

R

SUB

BPF

SUB

COMV.

REC

APC

B

PA

P

R

PB

PB

BGA-B

BGA-A

LPF

SUB

DEM

FM

AGC

SLD

VCO

REC

BGA

ENH

DETAIL

N.L

SERIAL

EMPH.

DECODER

MAIN

EMPH.

FM

MOD

EQ

REC

KIL

IC201 2 REC

IC260 4 REC/PB

REC_C OUT

2

(H)

380mVp-p

(V)

3.6Vp-p

REC_FM_OUT

REC_H_OUT

7

95

TRICK_H_OUT

REC _CURRENT_CTL
16

99

S

N

EQ

SQPB

Q201

BUFFER

LPF

P

1

6 8

PB

EQ

FM

AGC

4

72

13

Q VD IC160

25

QV/QH_INS

2021

96

C ROT PULSE IN

REC/PB

IC201 ok

98

RF_PULSE_IN

IC201 7 REC

IC260 9 REC

SYSCON

FROM/TO

C ROT IC160 15

I2C CLK IC16071I2C DATA IC160

360mVp-p

170mVp-p

BLOCK

(SEE PAGE 3-5)

17

RF ENV IC160 8

ENV SW IC160

(30Hz)

1.6Vp-p

18

HA SWP IC16016RF SWP IC160

SLV-KS1

3-2. VIDEO BLOCK DIAGRAM

(SEE PAGE 4-7,9,13)

MA-370 BOARD (1/3)

J562 (1/4)

IC260 5 REC/PB

(V)

0.6Vp-p

IC260 7 PB

5

H_SYNC

(H)

3.5Vp-p

IC260

VIDEO REC/PB AMP

PB

PB

16

19

CN260

879

6

DRUM

SP

CH1SPCH2EPCH1EPCH2

6

ENVDET_OUT

ENV

DET

PB

7

2

3

PB_OUT

COMP_OUT

HA (EP/SP)

COMP

HA

CONT

REC

PB

24

21

11

17

10

4

SW30

9

1

10

12

11

REC_C_IN

DET

AGC

ATF

REC_Y_IN

AGC

REC/MUTE/PB

TRICK. H

REC_CURRENT_ADJ2

(H)

380mVp-p

IC260 0 REC

3-3 3-4

REC

3.8Vp-p

CN270

PB RF

2

CHECK

RF SWP

3

PIN

IC260 qj REC

05

22

(H)

4.2Vp-p

IC201 wk REC/PB

IN

LINE

VIDEO

SLV-KS1

QP-1 BOARD (1/2)

(SEE PAGE 4-17)

FOR

CHECK

4

3

2

CN104

S-CLK

RESET

S-DATA

IC161

DATA

EEPROM

5

32I2C DATA EEP

(3/3)

IC160IC160

SYSTEM CONTROL

(1/2)

IC999

KIDS SOUND

CN999

CLK
6

31I2C CLK EEP

(1/2)

PLL DATA

X999

7
XT

STPIPDWN
128

312

PLL CLOCK

59

60

PLL CLK

PLL DATA

RST
34

4MHz

6
XT

PLL ENABLE

61

PLL ENABLE

P FAIL
78

D401

POWER LED

LED

Q405

DRIVE

83

MAIN/SAP

T REEL 80

REC/PB

IC999 6

S REEL
79

(4MHz)

3.0Vp-p

T SENS
7

S SENS
6

END LED
20

REC PRF
30

4fsc (in)
38

4fsc (out)
39

z

REC

S424

S425

SETUP

PLAY TIMER

S423

EP/SP

OSC IN
44

OSC OUT
45

S406

S412

S401

5FUNC KEY1

EJECT

STOP

POWER

IC403

REMOTE

CONTROL

RECEIVER

1

A

B

S409

PLAY

x

M

FF

S413

1

M

REW

S410

4FUNC KEY2

14REMOCON

MODE1

MODE2

MODE3

MODE4

CAM
33

292827

QVD

ENV SW

C ROT

V RF ENV

HA SWP16RF SWP18I2C DATA72I2C CLK

26

8

13

17

15

A MUTE

71

63A MUTE

(2/3)

(SEE PAGE 4-13)

IC160

SERVO CONTROL

D109

M12V

MA-370 BOARD (2/3)

CN101

1

1

VCC

OUTPUT

IC162

D VS

RESET

DRUM ERR

77

2

2

6

GEN

PULSE

PG REC/PB

IC160 o;

OUTPUT

M

8

FAIL

POWER

IC160 i;T REEL

DET

MATRIX

HALL

(30Hz)

4.6Vp-p

DEVICE

PH102

(T. REEL)

SW12V

1.6sec (TAPE TOP)

4.8Vp-p

DRUM PG90DRUM FG

D PG

3

3

PG

M901

PH101

(S. REEL)

IC160 ul S REEL

89

SW5VM12V

M12V

D FG

4

4

FG

SW5V

DRUM MOTOR

PS101

CN102

Q101

0.9sec (TAPE TOP)

4.8Vp-p

LIMITER

1

7

1

7

VM

VCC

U+

U-V+V-W+W-

(T. SENS)

D5V

FG REC/PB

IC160 il

6

6

TL

HALL

DEVICE

L500

REC

PROOF

REC/PB

IC160 el

C160 ij CAP FG SP

FG

MOTOR

CAPSTAN

(1078Hz)

4.4Vp-p

CN161

X160

CTL(X)

14.31818MHz

(14.31818MHz)

5.0Vp-p

CTL (Y)

1

CTL

HEAD

REC/PB

(25.3MHz)

4.6Vp-p

IC160 rg

4

IN 2

CAM

IC101

CAM (+)

CAM (-)

MOTOR DRIVE

2

M903

(30Hz)

5.0Vp-p

CN103

MOTOR

LOADING

10

S102

CAM

ENCODER

132

M

94

IC160 og REC

3

Q VD

25

IC201

RF ENV

6

IC260

ENV SW

2

IC260

,IC260

VIDEO

TO/FROM

RF SWP

HA SWP

3

4

,IC260
98

IC201

BLOCK

(SEE PAGE 3-4)

C ROT

96

IC201

I2C CLK

I2C DATA

20

21

IC201

IC201

TO

AUDIO

94

IC201

BLOCK

(SEE PAGE 3-10)

3-5 3-6

05

LED

Q103

DRIVE

Q102

(S. SENS)

S101

D103

D103

T/S. LED

CAP RVS24AMP Vref OUT91CAP FG87CTL + IN 95CTL - IN

CAP ERR
76

(360Hz)

4.5Vp-p

CAP VS

CTL-REF

CAP RVS

CAP FG

5

2

3

523

44

REF

U

V

W

CAPSTAN

M902

3-3. SERVO/SYSTEM CONTROL BLOCK DIAGRAM

LINE

J562 (4/4)

AUDIO

OUT

(MONO)

(SEE PAGE 4-9)

Q351

MUTE

SWITCH

(2/2)

IC201

AUDIO

NOMAL

EQ

PROCESS

REC

FROM

BLOCK

(SEE PAGE 3-5)

SYSCON
63

A MUTE IC160

80

81

82

94

REC

MUTE

LINE

AMP

P

R

93 92

ALC

L1

TU

89

74

78

REC

VREF

HA_PULSE_IN
97

AUDIO_MUTE_CTL

8487

85

PB:EP

REC:EP,LP

BIAS

AUTO

AUTO

86

88

(2/2)

AOUT

IC999

4

KIDS SOUND

(2/2)

(SEE PAGE 4-17)

QP-1 BOARD (2/2)

CN999

6

AUDIO OUT

SLV-KS1

3-4. AUDIO BLOCK DIAGRAM

MA-370 BOARD (3/3)

AUDIO

LINE

J562 (3/4)

(MONO)

IN

CN350

4

IC350

AUDIO

HEAD

REC/PB

42

HEAD

SWITCH

3

AUDIO

1

HEAD

ERASE

BIAS

Q350

SWITCH

OSC

BIAS

T380,Q380

FULL

ERASE

50Vp-p (69.9kHz)

T380 6 REC

CN351

1

HEAD

HEAD

05

3-7 3-8