Hitachi vt-fx340e Service Manual

SERVICE MANUAL

TK No. 5302E

VT-FX340E(UK)
VT-MX310E(UK)

SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT

VIDEO CASSETTE RECORDER

May 2003

Digital Media Division, Tokai

CONTENTS

1 CAUTIONS FOR SAFETY IN PERFORMING

REPAIR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-1

1-1 IMPORTANT SAFETY PRECAUTIONS . . . . . . . . . 1-1

1-1-1 Product Safety Notice . . . . . . . . . . . . . . . . . . . . . 1-1

1-1-2 Precautions during Servicing. . . . . . . . . . . . . . . . 1-1

1-1-3 Safety Check after Servicing. . . . . . . . . . . . . . . . 1-2

1-2 STANDARD NOTES FOR SERVICING. . . . . . . . . . 1-3

1-2-1 Circuit Board Indications . . . . . . . . . . . . . . . . . . . 1-3

1-2-2 Instructions for Connectors . . . . . . . . . . . . . . . . . 1-3

1-2-3 How to Remove/Install Flat Pack-IC . . . . . . . . . . 1-3

1-2-4 Instructions for Handling Semi-conductors . . . . . 1-5

2 GENERAL INFORMATION. . . . . . . . . . . . . . . . .2-1

2-1 SPECIFICATIONS. . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

2-2 COMPARISON OF MODELS . . . . . . . . . . . . . . . . . 2-2

2-2-1 Comparison of Features . . . . . . . . . . . . . . . . . . . 2-2

2-2-2 Comparison of Main Control ICs. . . . . . . . . . . . . 2-2

2-3 FUNCTION INDICATOR SYMBOLS . . . . . . . . . . . . 2-4

2-4 OPERATING CONTROLS AND FUNCTIONS . . . . 2-5

3 MAINTENANCE AND INSPECTION. . . . . . . . . .3-1

3-1 TROUBLESHOOTING. . . . . . . . . . . . . . . . . . . . . . . 3-1

3-2 STANDARD MAINTENANCE . . . . . . . . . . . . . . . . . 3-6

3-2-1 Service Schedule of Components. . . . . . . . . . . . 3-6

3-2-2 Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7

4 DISASSEMBLY. . . . . . . . . . . . . . . . . . . . . . . . . .4-1

4-1 CABINET DISASSEMBLY INSTRUCTIONS. . . . . . 4-1

4-1-1 Disassembly Flowchart . . . . . . . . . . . . . . . . . . . . 4-1

4-1-2 Disassembly Method. . . . . . . . . . . . . . . . . . . . . . 4-1

4-2 DISASSEMBLY/ASSEMBLY PROCEDURES

OF DECK MECHANISM . . . . . . . . . . . . . . . . . . . . . 4-6

4-3 ALIGNMENT PROCEDURES OF MECHANISM. . 4-13

5 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . .5-1

5-1 PREPARATION FOR SERVICING . . . . . . . . . . . . . 5-1

5-1-1 How to Enter the Service Mode. . . . . . . . . . . . . . 5-1

5-2 FIXTURE AND TAPE FOR ADJUSTMENT. . . . . . . 5-2

5-2-1 How to Use The Fixtures. . . . . . . . . . . . . . . . . . . 5-2

5-3 ELECTRICAL ADJUSTMENT INSTRUCTIONS . . . 5-3

5-3-1 Test Equipment Required . . . . . . . . . . . . . . . . . . 5-3

5-3-2 Head Switching Position Adjustment. . . . . . . . . . 5-3

5-4 MECHANICAL ALIGNMENT PROCEDURES. . . . . 5-4

5-4-1 Service Information . . . . . . . . . . . . . . . . . . . . . . . 5-4

5-4-2 Tape Interchangeability Alignment . . . . . . . . . . . 5-5

1-A. Preliminary/Final Checking and

Alignment of Tape Path. . . . . . . . . . . . . . . . . . . . 5-6

1-B. X Value Alignment. . . . . . . . . . . . . . . . . . . . . . . . 5-6

1-C. Checking/Adjustment of Envelope Waveform. . . 5-7
1-D. Azimuth Alignment of

Audio/Control/Erase Head. . . . . . . . . . . . . . . . . . 5-7

6 EXPLODEDS VIEWS AND PARTS LIST . . . . . 6-1

6-1 EXPLODED VIEWS . . . . . . . . . . . . . . . . . . . . . . . . .6-1

6-1-1 Cabinet Section. . . . . . . . . . . . . . . . . . . . . . . . . . .6-1

6-1-2 Deck Mechanism View 1 Section . . . . . . . . . . . . .6-2

6-1-3 Deck Mechanism View 2 Section . . . . . . . . . . . . .6-3

6-1-4 Deck Mechanism View 3 Section . . . . . . . . . . . . .6-4

6-2 REPLACEMENT PARTS LIST . . . . . . . . . . . . . . . . .6-5

6-2-1 Mechanical Parts List . . . . . . . . . . . . . . . . . . . . . .6-5

6-2-2 Electrical Parts List . . . . . . . . . . . . . . . . . . . . . . . .6-7

SCHEMATIC, CIRCUIT BOARD AND BLOCK
DIAGRAMS

1 SCHEMATIC DIAGRAMS/CBA’S AND TEST POINTS . 1

2 WIRING DIAGRAMS. . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

3 SCHEMATIC DIAGRAMS. . . . . . . . . . . . . . . . . . . . . . . . 4

3-1 Main 1/7 Schematic Diagram. . . . . . . . . . . . . . . . . . . . 4

3-2 Main 2/7 & Sensor Schematic Diagrams. . . . . . . . . . . 5

3-3 Main 3/7 Schematic Diagram. . . . . . . . . . . . . . . . . . . . 6

3-4 Main 4/7 & Jack Schematic Diagram. . . . . . . . . . . . . . 7

3-5 Main 5/7 Schematic Diagram. . . . . . . . . . . . . . . . . . . . 8

3-6 Main 6/7 Schematic Diagram ( V T-FX34 0E(UK) ) . . . . 9

3-7 Main 7/7 Schematic Diagram. . . . . . . . . . . . . . . . . . . 10

3-8 AFV Schematic Diagram ( VT-FX340E(UK) ) . . . . . . 11

4 WAVEFORMS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

5 CIRCUIT BOARD DIAGRAMS . . . . . . . . . . . . . . . . . . . 13

5-1 Main CBA Top View. . . . . . . . . . . . . . . . . . . . . . . . . . 13

5-2 Main CBA Bottom View. . . . . . . . . . . . . . . . . . . . . . . 14

5-3 Jack CBA Top / Bottom View. . . . . . . . . . . . . . . . . . . 15

5-4 AFV CBA Top / Bottom View ( VT-FX340E(UK) ) . . . 16

6 BLOCK DIAGRAMS . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

6-1 Servo/System Control Block Diagram . . . . . . . . . . . . 17

6-2 Video Block Diagram. . . . . . . . . . . . . . . . . . . . . . . . . 18

6-3 Audio Block Diagram (VT-MX310E(UK)). . . . . . . . . . 19

6-4 Audio Block Diagram (VT-FX340E(UK)) . . . . . . . . . . 20

6-5 Hi-Fi Audio Block Diagram (VT-FX340E(UK)). . . . . . 21

6-6 Power Supply Block Diagram . . . . . . . . . . . . . . . . . . 22

7 SYSTEM CONTROL TIMING CHARTS . . . . . . . . . . . . 23

8 IC PIN FUNCTION DESCRIPTIONS . . . . . . . . . . . . . . 30

9 LEAD IDENTIFICATIONS. . . . . . . . . . . . . . . . . . . . . . . 33

1

CAUTIONS FOR SAFETY IN PERFORMING REPAIR

1-1 IMPORTANT SAFETY PRECAUTIONS

1-1-1 Product Safety Notice

Some electrical and mechanical parts have special
safety-related characteristics which are often not evi­dent from visual inspection, nor can the protection
they give necessarily be obtained by replacing them
with components rated for higher voltage, wattage,
etc. Parts that have special safety characteristics are
identified by a ! on schematics and in parts lists. Use
of a substitute replacement that does not have the
same safety characteristics as the recommended
replacement part might create shock, fire, and/or other
hazards. The Product’s Safety is under review contin­uously and new instructions are issued whenever
appropriate. Prior to shipment from the factory, our
products are carefully inspected to confirm with the
recognized product safety and electrical codes of the
countries in which they are to be sold. However, in
order to maintain such compliance, it is equally impor­tant to implement the following precautions when a set
is being serviced.

1-1-2 Precautions during Servicing

A. Parts identified by the ! symbol are critical for

safety. Replace only with part number specified.

B. In addition to safety, other parts and assemblies

are specified for conformance with regulations
applying to spurious radiation. These must also be
replaced only with specified replacements.
Examples: RF converters, RF cables, noise block­ing capacitors, and noise blocking filters, etc.

C. Use specified internal wiring. Note especially:

1)Wires covered with PVC tubing

2)Double insulated wires

3)High voltage leads

D. Use specified insulating materials for hazardous

live parts. Note especially:

1)Insulation tape

2)PVC tubing

3)Spacers

4)Insulators for transistors

E. When replacing AC primary side components

(transformers, power cord, etc.), wrap ends of
wires securely about the terminals before solder­ing.

F. Observe that the wires do not contact heat produc-

ing parts (heatsinks, oxide metal film resistors, fus­ible resistors, etc.).

G. Check that replaced wires do not contact sharp

edges or pointed parts.

H. When a power cord has been replaced, check that

5 - 6 kg of force in any direction will not loosen it.

I. Also check areas surrounding repaired locations.

J. Be careful that foreign objects (screws, solder

droplets, etc.) do not remain inside the set.

K. Crimp type wire connector

The power transformer uses crimp type connectors
which connect the power cord and the primary side
of the transformer. When replacing the transformer,
follow these steps carefully and precisely to pre­vent shock hazards.
Replacement procedure

1)Remove the old connector by cutting the wires at a
point close to the connector.

Important: Do not re-use a connector. (Discard it.)

2)Strip about 15 mm of the insulation from the ends
of the wires. If the wires are stranded, twist the
strands to avoid frayed conductors.

3)Align the lengths of the wires to be connected.
Insert the wires fully into the connector.

4)Use a crimping tool to crimp the metal sleeve at its
center. Be sure to crimp fully to the complete clo­sure of the tool.

L. When connecting or disconnecting the internal con-

nectors, first, disconnect the AC plug from the AC
outlet.

1-1

1-1-3 Safety Check after Servicing

Examine the area surrounding the repaired location for
damage or deterioration. Observe that screws, parts,
and wires have been returned to their original posi­tions. Afterwards, do the following tests and confirm
the specified values to verify compliance with safety
standards.

1. Clearance Distance

When replacing primary circuit components, confirm
specified clearance distance (d) and (d’) between sol­dered terminals, and between terminals and surround­ing metallic parts. (See Fig. 1-1-1)

Table 1-1-1 : Ratings for selected area

AC Line Voltage Clearance Distance (d) (d’)

Chassis or Secondary Conductor

Primary Circuit Terminals

dd'

230 V

Note: This table is unofficial and for reference only.

Be sure to confirm the precise values.

≥ 3 mm(d)

≥ 6 mm(d’)

2. Leakage Current Test

Confirm the specified (or lower) leakage current
between B (earth ground, power cord plug prongs)
and externally exposed accessible parts (RF termi­nals, antenna terminals, video and audio input and
output terminals, microphone jacks, earphone jacks,
etc.) is lower than or equal to the specified value in the
table below.

Measuring Method (Power ON) :

Insert load Z between B (earth ground, power cord
plug prongs) and exposed accessible parts. Use an
AC voltmeter to measure across the terminals of load
Z. See Fig. 1-1-2 and the following table.

Table 1-1-2: Leakage current ratings for selected areas

AC Line Voltage Load Z Leakage Current (i)

2kΩ RES.

Connected in parallel

230 V

50kΩ RES.

Connected in parallel

i≤0.7mA AC Peak

i≤2mA DC

i≤0.7mA AC Peak

i≤2mA DC

Fig. 1-1-1

Exposed Accessible Part

Z

One side of

B

Power Cord Plug Prongs

One side of power cord plug

AC Voltmeter
(High Impedance)

Fig. 1-1-2

prongs (B) to:

RF or

Antenna terminals

A/V Input, Output

Note: This table is unofficial and for reference only. Be sure to confirm the precise values.

1-2

1-2 STANDARD NOTES FOR SERVICING

1-2-1 Circuit Board Indications

1. The output pin of the 3 pin Regulator ICs is indi­cated as shown.

Top View

Input

Out

2. For other ICs, pin 1 and every fifth pin are indicated
as shown.

In

Pin 1

3. The 1st pin of every male connector is indicated as
shown.

Pin 1

Bottom View

5

10

1-2-3 How to Remove / Install Flat

Pack-IC

1. Removal

With Hot-Air Flat Pack-IC Desoldering Machine:.

(1) Prepare the hot-air flat pack-IC desoldering

machine, then apply hot air to the Flat Pack-IC
(about 5 to 6 seconds). (Fig. 1-2-1)

Fig. 1-2-1

(2) Remove the flat pack-IC with tweezers while apply-

ing the hot air.

(3) Bottom of the flat pack-IC is fixed with glue to the

CBA; when removing entire flat pack-IC, first apply
soldering iron to center of the flat pack-IC and heat
up. Then remove (glue will be melted). (Fig. 1-2-6)

(4) Release the flat pack-IC from the CBA using twee-

zers. (Fig. 1-2-6)

1-2-2 Instructions for Connectors

1. When you connect or disconnect the FFC (Flexible
Foil Connector) cable, be sure to first disconnect
the AC cord.

2. FFC (Flexible Foil Connector) cable should be
inserted parallel into the connector, not at an angle.

FFC Cable

Connector

CBA

* Be careful to avoid a short circuit.

Caution:

1. Do not supply hot air to the chip parts around the
flat pack-IC for over 6 seconds because damage to
the chip parts may occur. Put masking tape around
the flat pack-IC to protect other parts from damage.
(Fig. 1-2-2)

2. The flat pack-IC on the CBA is affixed with glue, so
be careful not to break or damage the foil of each
pin or the solder lands under the IC when removing
it.

Hot-air
Flat Pack-IC
Desoldering

CBA

Masking
Tape

Tweezers

Machine

Flat Pack-IC

Fig. 1-2-2

1-3

With Soldering Iron:

(1) Using desoldering braid, remove the solder from all

pins of the flat pack-IC. When you use solder flux
which is applied to all pins of the flat pack-IC, you
can remove it easily. (Fig. 1-2-3)

Flat Pack-IC

Desoldering Braid

(4) Bottom of the flat pack-IC is fixed with glue to the

CBA; when removing entire flat pack-IC, first apply
soldering iron to center of the flat pack-IC and heat
up. Then remove (glue will be melted). (Fig. 1-2-6)

(5) Release the flat pack-IC from the CBA using twee-

zers. (Fig. 1-2-6)

Note:

When using a soldering iron, care must be taken
to ensure that the flat pack-IC is not being held by
glue. When the flat pack-IC is removed from the
CBA, handle it gently because it may be damaged
if force is applied.

Soldering Iron

Fig. 1-2-3

(2) Lift each lead of the flat pack-IC upward one by

one, using a sharp pin or wire to which solder will
not adhere (iron wire). When heating the pins, use
a fine tip soldering iron or a hot air desoldering
machine. (Fig. 1-2-4)

Sharp
Pin

Fine Tip
Soldering Iron

Fig. 1-2-4

(3) Bottom of the flat pack-IC is fixed with glue to the

CBA; when removing entire flat pack-IC, first apply
soldering iron to center of the flat pack-IC and heat
up. Then remove (glue will be melted). (Fig. 1-2-6)

(4) Release the flat pack-IC from the CBA using twee-

zers. (Fig. 1-2-6)

With Iron Wire:

(1) Using desoldering braid, remove the solder from all

pins of the flat pack-IC. When you use solder flux
which is applied to all pins of the flat pack-IC, you
can remove it easily. (Fig. 1-2-3)

(2) Affix the wire to a workbench or solid mounting

point, as shown in Fig. 1-2-5.

(3) While heating the pins using a fine tip soldering

iron or hot air blower, pull up the wire as the solder
melts so as to lift the IC leads from the CBA contact
pads as shown in Fig. 1-2-5.

To Solid
Mounting Point

CBA

Tweezers

Hot Air Blower

or

Iron Wire

Soldering Iron

Fig. 1-2-5

Fine Tip
Soldering Iron

Flat Pack-IC

Fig. 1-2-6

1-4

2. Installation

(1) Using desoldering braid, remove the solder from

the foil of each pin of the flat pack-IC on the CBA
so you can install a replacement flat pack-IC more
easily.

(2) The “I” mark on the flat pack-IC indicates pin 1.

(See Fig. 1-2-7.) Be sure this mark matches the 1
on the PCB when positioning for installation. Then
presolder the four corners of the flat pack-IC. (See
Fig. 1-2-8.)

(3) Solder all pins of the flat pack-IC. Be sure that none

of the pins have solder bridges.

Example :

Pin 1 of the Flat Pack-IC
is indicated by a " " mark.

Fig. 1-2-7

1-2-4 Instructions for Handling

Semi-conductors

Electrostatic breakdown of the semi-conductors may
occur due to a potential difference caused by electro­static charge during unpacking or repair work.

1. Ground for Human Body

Be sure to wear a grounding band (1MΩ) that is prop­erly grounded to remove any static electricity that may
be charged on the body.

2. Ground for Workbench

(1) Be sure to place a conductive sheet or copper plate

with proper grounding (1MΩ) on the workbench or
other surface, where the semi-conductors are to be
placed. Because the static electricity charge on
clothing will not escape through the body ground­ing band, be careful to avoid contacting semi-con­ductors with your clothing.

< Incorrect >

CBA

Presolder

Flat Pack-IC

Fig. 1-2-8

CBA

< Correct >

Grounding Band

1MΩ

CBA

1MΩ

Conductive Sheet or
Copper Plate

1-5

2

GENERAL INFORMATION

2-1 SPECIFICATIONS

[ VT-FX340E(UK) ]

General Specifications

Television system: PAL I

Video heads Six comprising of Four-video

Tape width : 12.65mm
Tape speed

SP : 23.39mm/s
LP : 11.70mm/s

Tuner channel

RF converter : Built-in UHF converter
Converter output : UHF Channel 22 to 69

Timer indication : 24-hour system
Operating temperature : 5
Terminals

AERIAL : Coaxial type, male
RF OUT : Coaxial type, female
AUDIO/VIDEO : 21 pin scart socket x 2

TV standard

and Two-audio heads
Helical scan system

IRA~IRJ
E21~E69
CATV

(adjustable)

º

C ~ 40ºC

[ VT-MX310E(UK) ]

Electrical Specifications

Video output level : 1Vp-p
Video output impedance : 75Ω unbalanced
Audio output level : -6dBV
Video input level : 0.5 ~2.0Vp-p
Audio input level : -10dBV
Video S/N ratio

(STANDARD): 45dB

Audio S/N ratio

(STANDARD): 41dB

Other Specifications

Power requirement : 220-240V 50Hz
Power consumption : 20 Watts (Stand by:3.3 watts)
Dimensions : W 360mm

H 92mm
D 226mm

Weight : 2.6 Kg. (approx.)

General Specifications

Television system: PAL I

Video heads Rotary two-head

Tape width : 12.65mm
Tape speed

SP : 23.39mm/s
LP : 11.70mm/s

Tuner channel

RF converter : Built-in UHF converter
Converter output : UHF Channel 22 to 69

Timer indication : 24-hour system
Operating temperature : 5
Terminals

AERIAL : Coaxial type, male
RF OUT : Coaxial type, female
AUDIO/VIDEO : 21 pin scart socket x 2

TV standard

helical scan system

IRA~IRJ
E21~E69
CATV

(adjustable)

º

C ~ 40ºC

Electrical Specifications

Video output level : 1Vp-p
Video output impedance : 75
Audio output level : -6dBV
Video input level : 0.5 ~2.0Vp-p
Audio input level : -10dBV
Video S/N ratio

(STANDARD): 45dB

Audio S/N ratio

(STANDARD): 41dB

Ω unbalanced

Other Specifications

Power requirement : 220-240V ~ 50Hz
Power consumption : 20 Watts (Stand by: 3.3 watts)

Dimensions : W 360mm

H 92mm
D 226mm

Weight : 2.6 Kg. (approx.)

2-1

2-2 COMPARISON OF MODELS

2-2-1 Comparison of Features ←: Same as on left

ITEM VT-FX340E(UK)/MX310E(UK) VT-FX240EUK/MX210EUK

Cabinet Size 360(W) x 92(H) x 226(D) mm ←

Weight 2.6 kg ←

Power Consumption 20 W ←

APPEARANCE

Video Format VHS ←
Y/C Separation Comb Filter ←

YNR (Luminance Noise Reduction)
Circuit

VIDEO

New Synchronise Circuit --- ←
Picture Control O ←
Video/Audio Input (Rear) 2/2 (AV1/AV2) ←
Video/Audio Input (Front) --- ←

INPUT/

Video/Audio Output (Rear) 2/2 (AV1/AV2) ←

OUTPUT

Remote Controller

Stereo CM Skip Feature --- ←
Auto Clock Feature O ←
Number of Timer Programming 8 Program/year ←
Self Diagnosis Funtion O (4 Modes) ←
Back-up Time 60 s ←

OTHERMECHANISM

SQPB --- ←
Surge Absorber --- ←
Auto Power Off Feature O ←
Local Broadcast Setting O ←
Multi Search Feature O (Index, Time Search, Quick Find) ←

Search Speed

FF/REW Time (T-120 Tape)

Head Composition
[VT-FX340E(UK)] / [VT-FX240EUK]

Head Composition
[VT-MX310E(UK)] / [VT-MX210EUK]

Head Material
[VT-FX340E(UK)] / [VT-FX240EUK]

Head Material
[VT-MX310E(UK)] / [VT-MX210EUK]

VISS O (Index Search) ←

PULSE

VT-RM340E [VT-FX340E(UK)]

VT-RM310E [VT-MX310E(UK)]

FF: approx. 100 s, REW: approx. 100 s

Hi-Fi Audio: 2[28/28 µm]

Hi-Fi Audio: Ferrite

Flame by Flame Mode [VT-FX340E(UK)]

Tracking Mode [VT-MX310E(UK)]

O ←

VT-RM240E [VT-FX240EUK]

VT-RM210E [VT-MX210EUK]

SP: X5/X7

LP: X5/X11

DA4+Hi-Fi

SP: 2[49/49 µm]
LP: 2[25/25 µm]

DA2 28/28 µm ←

SP: Ferrite
LP: Ferrite

SP: Ferrite
LP: Ferrite

Flame by Flame Mode

Tracking Mode [VT-MX210EUK]

←

←

←

←

←

[VT-FX240EUK]

2-2

2-2-2 Comparison of Main Control ICs ←: Same as on left

ITEM OPERATION VT-FX340E(UK)/MX310E(UK) VT-FX240EUK/MX210EUK

Video Video Signal Process LA71750AM-MTB(IC301) ←

Audio

System Control

Timer Display Driver PT6958-FN-TP(IC571) ←

Power Switching Driver - -

FM Audio Signal Process

Linear Audio Signal Process Included in IC301 ←
Main Microcomputer µP M37762MCA-AC8GP(IC501) M37762MCA-1C1GP(IC501)
VCR-EEP ROM BR24C02F-W(IC503) ←

Reset - -

Loading Motor Drive - -

Cylinder/Loading Motor Control - -

Power Reset - -

VPS LC74793JM-TRM(IC640) -

Audio Output Selector

LA72648M(IC451)

[VT-FX340E(UK)]

TC4052BF(EL)(IC151)

[VT-MX310E(UK)]

LA72646M-A-MPB(IC451)

[VT-FX240EUK]

TC4052BF(EL)(IC151)

[VT-MX210EUK]

2-3

2-3 FUNCTION INDICATOR SYMBOLS

Note:

The following symbols will appear on the indicator panel to indicate the current mode or operation of the VCR.
On-screen modes will also be momentarily displayed on the tv screen when you press the operation buttons.

Display panel

" H "= LED Light on, " L "= LED Light off

LED MODE INDICATOR ACTIVE

CASSETTE "IN"
CASSETTE "OUT"

CLOCK " 88:88 ON

POWER ON " PWR." ON

REC " REC " ON

REC PAUSE " REC " Blinks at 0.8Hz interval

T- R E C , O T R

When reel and capstan mechanism is not
functioning correctly

When tape loading mechanism is not func­tioning correctly

When cassette loading mechanism is not
functioning correctly

When the drum is not working properly

P-ON Power safety detection

" "
" "

" "

" "
" 1 "

" "
" 2 "

" "
" 3 "

" "
" 4 "

" "
" 5 "

ON
OFF

ON
(T-REC OFF,T-REC incomplete
Blinks at 0.8Hz interval)

Blinks at 0.8Hz interval

Blinks at 0.8Hz interval

Blinks at 0.8Hz interval

Blinks at 0.8Hz interval

Blinks at 0.8Hz interval

S-INH condition All modes Blinks at 0.8Hz interval

2-4

PWR. REC

10

11

14

12

13

L

o

2-4 OPERATING CONTROLS AND FUNCTIONS

[ VT-FX340E(UK) ]

Front Panel

1. Cassette compartment

2. D (F.FWD) button

3. B (PLAY) button

4. E (REW) button

5. CA( STOP/EJECT) button

6. I (REC) button

7. Indicator (See below)

8. PROGRAM (o/p) [TRACKING]

buttons

9.y (OPERATE) button

10. PWR. (Power) indicator

11. TAPE IN indicator

12. REC indicator

13. (Timer) indicator

14. CLOCK indicator

15. Power cord

16. AV2 (DECODER) socket

17. AV1 (TV) socket

18. RF OUT socket

19. AERIAL socket

Indicator

Rear Panel

15

PROGRAM

TRACKING

1

247

35689

1716

AV2(DECODER) AV1(TV)

AERIAL

RF OUT

Remote Control

OPERATE

1

1

2

4

7

VIDEO Plus+

3

4

MENU

5

6
7

8

REW

REC

QUICK-FIND

9

10

AUDIO

SELECT

2

5

8

0

DISPLAY

PLAY

TO

S

TIME

SEARCH

3

6

9

DAILY/WEEKLY

COUNTER

RESET

P

SPEED

INDEX

EJECT

PROGRAM

SLOW

MEMORY

D

W

.F

F

PAUSE/STILL

22

21

20
19

18

17
16

15
14

13
12

11

1819

1. OPERATE button

2. NUMBER buttons

3. VIDEO Plus+ button

4. MENU button

5. DISPLAY button

6. REW/s button

7. STOP/

8. REC button

9. QUICK-FIND button

10. TIME SEARCH button

11. INDEX SEARCH button

12. PAUSE/STILL button

13. SPEED button

14. F.FWD/B button

15. PLAY/

16. COUNTER RESET button

17. COUNTER MEMORY button

18. SLOW button

19. DAILY/WEEKLY button

20. PROGRAM (o/p) buttons

21. EJECT button

22. AUDIO SELECT button

L

o

button

button

2-5

PWR. REC

10

11

14

12

13

L

o

[ VT-MX310E(UK) ]

Front Panel

PROGRAM

TRACKING

Indicator

Rear Panel

15

1

1. Cassette compartment

2. D (F.FWD) button

3. B (PLAY) button

4. E (REW) button

5.

CA(STOP/EJECT) button

6.

I (

REC) button

7. Indicator (See below)

8. PROGRAM (o/p) [TRACKING]

buttons

9.y (OPERATE) button

247

35689

10. PWR. (Power) indicator

11. TAPE IN indicator

12. REC indicator

13. (Timer) indicator

14. CLOCK indicator

1716

AV2(DECODER) AV1(TV)

15. Power cord

16. AV2 (DECODER) socket

17. AV1 (TV) socket

18. RF OUT socket

19. AERIAL socket

AERIAL

RF OUT

Remote Control

OPERATE

1

2

1

5

2

3

4

4

7

VIDEO Plus+

MENU

8

0

DISPLAY

5

EW

6
7

R

REC

8

DAILY/WEEKLY

PLAY

O

T

S

3

6

9

RESET

P

SPEED

EJECT

PROGRAM

COUNTER

MEMORY

FWD

.

F

PAUSE/STILL

17

16
15

14
13

12
11

10
9

1819

1. OPERATE button

2. NUMBER buttons

3. VIDEO Plus+ button

4. MENU button

5. DISPLAY button

6. REW/s button

7. STOP/

8. REC button

9. PAUSE/STILL button

10. SPEED button

11. F.FWD/ B button

12. PLAY/

13. COUNTER RESET button

14. COUNTER MEMORY button

15. DAILY/WEEKLY button

16. PROGRAM (o/p) buttons

17. EJECT button

L

o

button

button

2-6

3

MAINTENANCE AND INSPECTION

3-1 TROUBLESHOOTING

Troubleshooting is how to service for the specifying malfunction or poor parts.
Detect malfunction or poor parts and service as the following charts.

Video problem 1 (No recording Video)

RF INPUT

Check Video signal at pin 48 of IC301.

OK

Check TU701 and line between
TU701 and pin 48 of IC301, and
service it if detective.

Check Video signal at pin 50 of IC501.

OK

Check Video signal at pin 56 of IC301.

OK

Check IC501 and line between pin
52 of IC501 and pin 56 of IC301, and
service it if detective.

Cleaning the Video Head. (See page 3-7.) Or check Cylinder Assembly and service it if detective.

LINE INPUT (AV2)

NG

NG

LINE INPUT (AV1)

Check Video signal at pin 50 of IC301.

OK

Check A/V cable, JK101 and line
between JK101 and pin 50 of IC301, and
service it if detective.

NG

Check IC301, X301 and line between pin 65 of IC301
and pin 50 of IC501, and service it if detective.

NG

Check Video signal at pin 52 of IC301.

OK

Check Video signal at pin 50 of IC501.

OK

Check Video signal at pin 56 of IC301.

OK

Cleaning the Video Head.(See page 3-7.)
Or check Cylinder Assembly and service it if detective.

NG

Check AV cable, JK102 and line
of IC301,

NG

Check IC301, X301 and
pin 50 of IC501

NG

Check IC501 and line between pin 52 of IC501 and pin
56 of IC301, and service it if detective.

and service it if detective.

, and service it if detective.

between

line between pin 52 of IC301 and

JK102 and pin 52

3-1

Video problem 2 (No playback Video)

Check signal at pin 93 and pin 96 (or pin 87, pin 90) of IC301.

OK

Check Video signal at pin 50 of IC501.

OK

Check IC301, X301 and line between pin
65 of IC301 and pin 50 of IC501, and
service it if detective.

NG

NG

Cleaning the Video Head. (See page 3-7.) Or check
Cylinder Assembly and service it if detective.

Check Video signal at pin 56 of IC301.

OK

RF OUT LINE OUT (AV1) LINE OUT (AV2)

Check Video signal at pin 6 of TU701.

OK OK OK

Check TU701 and service
it if detective.

Check line between pin 52 of IC501
and pin 6 of TU701, and service it if
detective.

NG NG

Check Video signal at pin 19 of JK101. Check Video signal at pin 19 of JK102.

Check JK101 and AV cable,
and service it if detective.

Check line between pin 61 of IC301
and pin 19 of JK101, and service it if
detective.

NG

Check IC501 and line between pin 52 of IC501 and pin
56 of IC301, and service it if detective.

Check JK102 and AV cable,
and service it if detective.

Check line between pin 63 of IC301
and pin 19 of JK102, and service it if
detective.

3-2

Audio problem 1 (No recording Normal Audio)

RF-INPUT

(with VT-FX340E(UK))

Change for Audio-mode(MONO) by AUDIO­SELECT KEY of Remote Controller.

OK

Check SIF signal at pin 2 of CN701.

OK

Check Audio signal at pin 4 and 5 of CN701
or pin 4 and 50 of IC451.

OK

Check Audio signal at pin 13, pin 15 or pin 17 of IC301.

OK

Check Tape interchangeability alignment. (See page 5-5.)

OK

Cleaning the Audio Control Head. (See page 3-7.)

LINE INPUT (AV2)

(with VT-FX340E(UK))

Check Audio signal at pin 10 or pin 56 of IC451.

OK

(with VT-MX310E(UK))

NG

NG

(with VT-MX310E(UK))

LINE INPUT (AV1)

Check Audio signal at pin 6 or 52 of IC451.

Check TU701 and
service it if detective.

Check AFV CBA and
service it if detective.

NG

Check IC451 and IC301, and service it if detective.

Check ACE Head Assembly and service it if detective.

NG

Check AV cable, JK102 and line between JK102 and pin
(10, 56) of IC451, and service it if detective.

(with VT-MX310E(UK))

(with VT-FX340E(UK))

OK

Check AV cable, JK101 and
line between JK101 and pin
(6, 52) of IC451, and service
it if detective.

NG

NG

Check Audio signal at pin 17 of IC301.

OK

Check Tape interchangeability alignment. (See page 5-5.)

OK

Cleaning the Audio Control Head. (See page 3-7.)

NG

Check IC451 and IC301, and service it if detective.

NG

Check ACE Head Assembly and service it if detective.

Audio problem 2 (No playback Normal Audio)

(RF OUTPUT/AV1) (AV2)

Check Audio signal at pin 5 of IC301.

NG

Cleaning the Audio

Check Tape interchangeability
alignment. (See page 5-5.)

NG

Check ACE Head Assembly and service it if detective.

Check Audio signal at pin 11 of IC301 or pin 80 of IC451.

OK(with VT-MX310E(UK))

Check Audio signal at pin
(72, 74, 76) of IC451.

NG

Check IC451
it if detective.

and service

OK

Control Head.
(See page 3-7.)

OK(with VT-MX310E(UK))

OK

Check TU701 or
A-OUT jack, and
service it if detective.

Check IC301 and IC451
and service it if detective.

OK

Check Audio signal at pin 5 of IC301.

Check Tape interchangeability
alignment. (See page 5-5.)

Check ACE Head Assembly and service it if detective.

Check Audio signal at pin 11 of IC301 or pin 80 of IC451.

NG

Check Audio signal at pin
65 and pin 67 of IC451.

,

Check IC451
it if detective.

NG

NG

OK(with VT-MX310E(UK))

OK

NG

and service

Cleaning the Audio

OK

Control Head.
(See page 3-7.)

OK(with VT-MX310E(UK))

Check A-OUT jack and
service it if detective.

Check IC301 and IC451
and service it if detective.

OK

NG

,

3-3

Audio problem 3 (No recording Hi-Fi Audio)

RF-INPUT

NG NG

Check SIF signal at pin
2 of CN701.

OK

Check Audio signal at
pin 4 and 5 of CN701 or
pin 4 and 50 of IC451.

OK

Check signal at pin 26 of IC451.

OK

Cleaning the Video Head. (See page 3-7.) Or check Cylinder Assembly and service it if detective.

LINE INPUT (AV2)

Check Audio signal at pin 10 and 56 of IC451.

OK

Check signal at pin 26 of IC451.

OK

Cleaning the Video Head. (See page 3-7.) Or check Cylinder Assembly and service it if detective.

Check TU701 and
service it if detective.

NG

Check AFV CBA and
service it if detective.

NG

NG

NG

LINE INPUT (AV1)

Check Audio signal at
pin 6 and pin 52 of IC451.

OK

Check signal at pin 26 of IC451.

NG

Check IC451 and
service it if detective.

Check AV cable, JK102 and line between JK102 and
pin (10, 56) of IC451, and service it if detective.

Check IC451 and service it if detective.

Check A/V cable, JK101
and line between JK101
and pin (6, 52) of IC451,
and service it if detective.

OK

Cleaning the Video Head.
(See page 3-7.)

NG

Audio problem 4 (No playback Hi-Fi Audio)

(AV1) (AV2)

Check signal at pin 24 and 27 of IC451.

OK

Cleaning the Video Head. (See
page 3-7.) Or check Cylinder
Assembly and service it if detective.

Check Audio signal at pin
74 and pin 76 of IC451.

OK

Check TU701 and A-OUT jack, and service it if detective.

NG

Check IC451 and
service it if detective.

NG

Check signal at pin 24 and pin 27 of IC451.

OK

Cleaning the Video Head. (See
page 3-7.) Or check Cylinder
Assembly and service it if detective.

Check Audio signal at pin
65 and pin 67 of IC451.

OK

NG

Check IC451 and
service it if detective.

NG

3-4

Power problem

It is highly recommended that a variable isolation
transformer which can monitor current be used.
(Alternatively a variable AC source which moni­tors current will do). Read directions below before
power is added!

1] Check for any defective parts while the secondary
rectifying diodes are disconnected (D011, D013 and
D014) perform a diode check in both forward and
reverse directions through a tester.

2] Remove the following components and check for
defects: snubber diode (D005), switching FET (Q001),
source resistor (R006), control transistor (Q002).

Repair method

CHECK

Connect unit to the isolation trans­former and slowly increase the AC sup­ply while monitoring the current, if it
draws too much current (Be ware fuse
is rated for 1.6 amps), then turn off
supply and do repair method #1.

NO

Check whether the primary rectifying
DC of the Switching power supply has
an output. (Reading should be about
168V.)

YES

With the primary DC working check
the secondary 5V.

YES

Are the 44V, 12V and 5V
higher than normal?

NO

Although the secondary 5V is working,
are any of the other voltages higher
than normal (44V and 12V)?

NO

There is no problem on the SW power
supply.

YES

NO

NO

YES

YES

#1

#2

#3

#4

#5

Repair method #2

Check the fuse 1.6A (F001), primary rectifying diodes
(D001-D004) as possible problems. Remove the
above mentioned parts and check them. The circuit
which turns on switching FET (Q001) may be
regarded as a possible cause, even if the load at the
secondary side is shorted, it can't be detected
because switching FET (Q001) isn't operating. Per­form check according to the step 1 and 2 of repair
method #1 and check the following parts:
(Remove the part from PCB)
Switching FET (Q001), source resistor (R006), gate
resistor (R008) and start resistor (R003, R004, R005
and R028).

Repair method #3

A circuit to turn on switching FET (Q001) may not work
and this may be regarded as a cause of trouble. Even
if the load at the secondary side is short-circuited, it
cannot be detected because switching FET (Q001)
does not turn on. Therefore, perform check according
to the steps 1] and 2] of the repair method #1 and exe­cute the under-mentioned parts breakage check.
(Remove the part from PCB.)
switching FET (Q001), source resistor (R006), control
transistor (Q002), gate resistor (R008) and start resis­tor (R003, R004, R005 and R028).

Repair method #4

Repair method #1

(Power must be off)
Short circuit in the secondary side. check diode D014,
D011, D012, D013, switching FET (Q001), control
transistor (Q002), diode (D006), and resistor (R014)
replace as necessary.
Disconnect 44V diode (D011), 12V diode (D013), 5V
diode (D014). Check the load continuity of 44V line,
12V line and 5V line through a tester (resistance
range).
If the tester indicates a lower resistance value around
0 ohm, the line is short-circuited.
Before repairing the switching power supply, find out
the short-circuited area of such line and repair it.
If the tester does not indicate any low resistance value
(around 0 ohm), no load is short-circuited and there is
no problem.

The feedback circuit which is monitored by the output
of voltage may not work and this may be regarded as
a possible cause, remove control transistor Q002 and
check for defects. More over, a photo coupler (IC001)
and transistor (Q004) may be defective, replace any
defective parts with factory originals.

Repair method #5

If the output voltage of the secondary side is slightly
high, the line load may be in the "OPEN" state and this
may be regarded as a cause of trouble. If there is no
output voltage on the secondary side, the rectifying
diodes (D014) and (D015) may be defective.

3-5

3-2 STANDARD MAINTENANCE

3-2-1 Service Schedule of Components

h: Hours : Check I: Change

Deck Periodic Service Schedule

Ref.No. Part Name 1,000 h 2,000 h 3,000 h 4,000 h

B2

B3

B8

B587 Tension Lever Assembly II

B31

B573, B574

B37 Capstan Motor II

B52

*B73

B86 F Brake Assembly (HI) II

B133

B410 Pinch Arm Assembly II

B414 M Brake (SP) Assembly (HI) II

B416

Cylinder Assembly

Loading Motor Assembly

Pulley Assembly (HI)

AC Head Assembly

Reel S, Reel T

Cap Belt

FE Head Assembly

Idler Assembly (HI)

M Brake (TU) Assembly (HI)

II

I

II

I

I

II

I

II

II

B525 LDG Belt II

Notes:

1.Clean all parts for the tape transport (Upper Drum with Video Head / Pinch Roller / Audio Control Head / Full
Erase Head) using 90% lsopropyl Alcohol.

2.After cleaning the parts, do all DECK ADJUSTMENTS.

3.For the reference numbers listed above, refer to Deck Exploded Views.

* FE Head Assembly (B73) is used in VT-FX340E(UK) only.

3-6

3-2-2 Cleaning

Cleaning of Video Head

Clean the head with a head cleaning stick or chamois
cloth.

Procedure

1.Remove the top cabinet.

2.Put on a glove (thin type) to avoid touching the
upper and lower drum with your bare hand.

3.Put a few drops of 90% Isopropyl alcohol on the
head cleaning stick or on the chamois cloth and,
by slightly pressing it against the head tip, turn the
upper drum to the right and to the left.

Notes:

1.The video head surface is made of very hard
material, but since it is very thin, avoid cleaning it
vertically.

2.Wait for the cleaned part to dry thoroughly before
operating the unit.

3.Do not reuse a stained head cleaning stick or a
stained chamois cloth.

Cleaning of ACE Head

Clean the head with a cotton swab.

Procedure

1.Remove the top cabinet.

2.Dip the cotton swab in 90% Isopropyl alcohol and
clean the ACE head. Be careful not to damage the
upper drum and other tape running parts.

Notes:

1.Avoid cleaning the ACE head vertically.

2.Wait for the cleaned part to dry thoroughly before
operating the unit or damage may occur.

ACE Head

Upper
Cylinder

Do Not !

Video Head

Cleaning Stick

3-7

4

DISASSEMBLY

4-1 CABINET DISASSEMBLY INSTRUCTIONS

4-1-1 Disassembly Flowchart

This flowchart indicates the disassembly steps to gain
access to item(s) to be serviced. When reassembling,
follow the steps in reverse order. Bend, route, and
dress the cables as they were originally.

[1] Top Case

[2] Front Assembly

[3] VCR Chassis Unit

[4] Jack CBA

[5] Deck Assembly

[6] Main CBA

[7] AFV CBA

[VT-FX340E(UK)]

[8] Cylinder Shield

4-1-2. Disassembly Method

REMOVAL

ID/

LOC.

No.

PAR T

REMOVE/*UNHOOK/

Fig.

UNLOCK/RELEASE/

No.

UNPLUG/DESOLDER

Note

(1): Identification (location) No. of parts in the figures
(2): Name of the part
(3): Figure Number for reference
(4): Identification of parts to be removed, unhooked,

unlocked, released, unplugged, unclamped, or
desoldered.
P=Spring, L=Locking Tab, S=Screw,
CN=Connector
*=Unhook, Unlock, Release, Unplug, or Desolder
e.g. 2(S-2) = two Screws (S-2),
2(L-2) = two Locking Tabs (L-2)

(5): Refer to “Reference Notes.”

Reference Notes

CAUTION: Locking Tabs (L-1) and (L-2) are fragile.
Be careful not to break them.

1. Remove five Screws (S-2), two Screws (S-3) and
Screw (S-4). Then, slowly lift the VCR Chassis Unit
(Deck Assembly, Jack CBA and Main CBA) up.

2. When reassembling, solder wire jumpers as shown
in Fig. 4-1-5.

3. Before installing the Deck Assembly, be sure to
place the pin of LD-SW on Main CBA as shown in
Fig. 4-1-6. Then, install the Deck Assembly while
aligning the hole of Cam Gear with the pin of LD­SW, the shaft of Cam Gear with the hole of LD-SW
as shown in Fig. 4-1-6.

[1] Top Case 4-1-1 7(S-1) -

Front

[2]

Assembly

VCR Chas-

[3]

sis Unit

[4] Jack CBA 4-1-4 Desolder, (S-5) -

Deck

[5]

Assembly

[6] Main CBA 4-1-5 ---------- -

AFV CBA

[7]

[VT-FX340E(UK)]

Cylinder

[8]

Shield

↓

(1)

↓

(2)

4-1-2 *3(L-1),*4(L-2) -

4-1-3 5(S-2), 2(S-3), (S-4), 1

4-1-5
4-1-6

4-1-5 ---------- -

4-1-5 2(S-7) -

2(S-6), Desolder 2,3

↓

(3)

↓

(4)

↓

(5)

4-1

(S-1)

(S-5)

[4] Jack CBA

Desolder

[1] Top Case

(S-1)

(S-1)

Fig. 4-1-1

(S-2)

[3]VCR
Chassis Unit

(S-2)

(S-3)

(S-2)

(S-4)

(S-3)

(S-2)

(L-2)

[2] Front
Assembly

(L-2)

Fig. 4-1-3

(L-1)

Fig. 4-1-2

Fig. 4-1-4

4-2

[8] Cylinder Shield

FE Head

Cylinder Assembly

(S-7)

Pin

[5] Deck Assembly

[7] AFV CBA
[VT-FX340E(UK)]

Desolder from
bottom

From

From
FE Head

Cylinder
Assembly

(S-6)

TOP VIEW

From
ACE Head
Assembly

ACE Head
Assembly

[6] Main CBA

(S-6)

From
Capstan Motor
Assembly

Lead with
blue stripe

[6] Main CBA

[5] Deck Assembly

Shaft

Hole

LD-SW

SW507
LD-SW

Cam Gear

Hole

Pin

[6] Main CBA

Fig. 4-1-6

Printing

Lead with
blue stripe

Lead connections of Deck Assembly and Main CBA

Lead with
blue stripe

Desolder
from bottom

side

Fig. 4-1-5

4-3

4-2 DISASSEMBLY/ASSEMBLY PROCEDURES OF DECK

MECHANISM

Before following the procedures described below, be sure to remove the deck assembly from the cabinet. (Refer to
CABINET DISASSEMBLY INSTRUCTIONS on page 4-1.)
All the following procedures, including those for adjustment and replacement of parts, should be done in Eject
mode; see the positions of [44] and [45] in Fig. 4-2-1 on page 4-6. When reassembling, follow the steps in reverse
order.

STEP

/LOC.

+[22] [22] F Brake Assembly (HI) B 4-2-2,4-2-12 *(L-6)

START-

ING

No.

[1] [1] Guide Holder A T 4-2-3 2(S-1)

[2] [1] Cassette Holder Assembly T 4-2-4

[3] [2] Slider (SP) T 4-2-5 *(L-1)

[4] [2] Slider (TU) T 4-2-5 *(L-2)

[5] [4] Lock Lever T 4-2-5 *(L-3),*(P-1)

[6] [2] Cassette Plate T 4-2-5

[7] [7] Cylinder Assembly T 4-2-1,4-2-6 Desolder, 3(S-2)

[8] [8] Loading Motor Assembly T 4-2-1,4-2-7

[9] [9] AC Head Assembly T 4-2-1,4-2-7 (S-4)

[10] [2] Tape Guide Arm Assembly T 4-2-1,4-2-8 *(P-2)

[11] [10] C Door Opener T 4-2-1,4-2-8 *(L-4)

[12] [11] Pinch Arm (B) T 4-2-1,4-2-8 *(P-3)

[13] [12] Pinch Arm Assembly T 4-2-1,4-2-8

[14] [14] FE Head Assembly T 4-2-1,4-2-9 (S-5)

[15] [15] Prism T 4-2-1,4-2-9 (S-6)

[16] [2] Slider Shaft T 4-2-10 *(L-5)

[17] [16] C Drive Lever (SP) T 4-2-10

[18] [16] C Drive Lever (TU) T 4-2-10 (S-7),*(P-4)

[19] [19] Capstan Motor B 4-2-2,4-2-11 3(S-8), Cap Belt

[20]
[21] [20]

[23] [22] Worm Holder B 4-2-2,4-2-13 (S-9),*(L-7),*(L-8)
[24] [22]

[25]
[26]

[27]

[28] [26]
[29] [28] TR Gear Spring B 4-2-13
[30] [29] TR Gear A/B B 4-2-13
[31] [31]
[32] [26]
[33] [26] BT Arm B 4-2-2,4-2-14 *(P-5)

No.

[20]

[25]

[20],[25]

[22],[23],

[26]

Clutch Assembly (HI) B 4-2-2,4-2-12 (C-1)

Center Gear B 4-2-12

Pulley Assembly (HI) B 4-2-2,4-2-13

Mode Gear B 4-2-2,4-2-13 (C-2)

Mode Lever (HI) B 4-2-2,4-2-13 (C-3)

Cam Gear (A) (HI) B 4-2-2,4-2-13 (C-4)

TR Gear C B 4-2-2,4-2-13 (C-5)

FF Arm (HI) B 4-2-1,4-2-13
Idler Assembly (HI) B 4-2-1,4-2-14 *(L-9)

PART

Fig. No.

REMOVAL INSTALLATION

REMOVE/*UNHOOK/
UNLOCK/RELEASE/
UNPLUG/DESOLDER

Desolder, LDG Belt,
2(S-3)

ADJUSTMENT

CONDITION

(+)Refer to Alignment
Sec.Page 4-11

4-4

STEP

/LOC.

START-

ING

No.

[34] [26]

[35] [34]

[36] [16],[26]

[37] [2],[26]

[38] [37] Tension Lever Assembly T 4-2-1,4-2-15

[39] [38] T Lever Holder T 4-2-15 *(L-10)
[40] [40]
[41] [15],[40] Sensor Gear (HI) T 4-2-1,4-2-15 (C-7)

[42] [36],[40] Reel T T 4-2-1,4-2-15

[43] [38] Reel S T 4-2-1,4-2-15

[44] [34],[38]

[45] [35]

[46] [19] TG Post Assembly T 4-2-1,4-2-16 *(L-11)

[47] [27] Rack Assembly R 4-2-17

[48] [47] F Door Opener R 4-2-17

[49] [49] Cleaner Assembly T 4-2-1,4-2-6

[50] [49] CL Post T 4-2-6 *(L-12)

↓

(1)

No.

Loading Arm (SP)
Assembly

Loading Arm (TU)
Assembly

M Brake (TU) Assembly
(HI)

M Brake (SP) Assembly
(HI)

M Gear (HI) T 4-2-1,4-2-15 (C-6)

Moving Guide S
Preparation

Moving Guide T
Preparation

↓

(2)

PART

↓

(3)

Fig. No.

B 4-2-2,4-2-14

B 4-2-2,4-2-14

T 4-2-1,4-2-15

T 4-2-1,4-2-15 *(P-6)

T 4-2-1,4-2-16

T 4-2-1,4-2-16

↓

(4)

↓

(5)

REMOVAL INSTALLATION

REMOVE/*UNHOOK/
UNLOCK/RELEASE/
UNPLUG/DESOLDER

↓

(6)

ADJUSTMENT

CONDITION

(+)Refer to Alignment
Sec.Page 4-11

(+)Refer to Alignment
Sec.Page 4-11

(+)Refer to Alignment
Sec.Page 4-11

↓

(7)

(1): Follow steps in sequence. When reassembling, follow the steps in reverse order.

These numbers are also used as identification (location) No. of parts in the figures.

(2): Indicates the part to start disassembling with in order to disassemble the part in column (1).

(3): Name of the part

(4): Location of the part: T=Top B=Bottom R=Right L=Left

(5): Figure Number

(6): Identification of parts to be removed, unhooked, unlocked, released, unplugged, unclamped, or desoldered.

P=Spring, W=Washer, C=Cut Washer, S=Screw, *=Unhook, Unlock, Release, Unplug, or Desolder

e.g., 2(L-2) = two Locking Tabs (L-2).

(7): Adjustment Information for Installation

(+):Refer to Deck Exploded Views for lubrication.

.

* FE Head Assembly ([22]) is used in VT-FX340E(UK) only.

4-5

Top View

[14]

[38]

[37]

[7] [49] [8]

[45][44] [46][9]

[32][43] [41] [40][31] [42]

[13]

[11]

[15]

[10]
[12]

[36]

Bottom View

[23]

[24]

[27]

Fig. 4-2-1

[19]

[35]

[34]

[25]

[26]

4-6

[33][20][28][22]

Fig. 4-2-2

(S-1)

[1]

(S-1)

Fig. 4-2-3

[7]

(L-1)

[3]

[6]

(L-2)

(P-1)

[49]

[4]

(L-3)

[5]

Fig. 4-2-5

Pin D

Pin C

Slots B

First, while pushing the locking tab as
shown in the right, slide and pull up the right
side on [2] to release Pin A and Pin B from
the slots A.
Then, remove Pin C and Pin D on [2] from
the slots B as shown.

[2]

Pin A

Locking tab

2

Pull up

A

1

Slide

Pin B

Slot A

Slot A

View for A

Fig. 4-2-4

Desolder
from bottom

(S-2)

View for A

[50]

(L-12)

A

Lead with
Red Stripe

Fig. 4-2-6

4-7

[9]

A

(S-4)

[8]

[14]

(S-5)

(S-6)

[15]

(S-3)

Adj. Screw

[13]

LDG
Belt

Desolder
from bottom

Lead with White Stripe

View for A

[8]

Fig. 4-2-7

[11]

(L-4)

(P-3)

[12]

[10]

Fig. 4-2-9

[17]

(L-5)

[16]

[18]

(P-4)

(P-2)

4-8

Pin of [12]

View for A

Pin of [10]

Groove of [27]

[27]

A

(S-7)

Fig. 4-2-10

When reassembling [10] and
[12], confirm that pin of [10]
and pin of [12] are in the
groove of [27] as shown.

Fig. 4-2-8

Cap Belt

[19]

(S-8)

Fig. 4-2-11

[24]

[27]

(S-9)

(L-8)

(C-4)

(C-5)

[28]

[29]

[30]

[26]

(L-7)

(C-3)

[23]

(C-2)

[25]

VT-FX340E(UK) only

[22]

turn

(L-6)

(C-1)

[20]

[21]

Pin on [22]

[31]

Position of Mode Lever when installed

Pin of [36]

Bottom View

[27]

Pin of [33]

Align [26] and [27] as shown.

First groove on [27]

Pin of [37]

First tooth on [44]

[26]

Position of pin on [22]

[27]

Fig. 4-2-12

Top View

[27]

When reassembling [27],
meet the first groove on
[27] to the first tooth on
[44] as shown.

Fig. 4-2-13

4-9

[33]

(P-5)

Refer to the Alignment
Section, Page 4-11.

[44]

[45]

[46]

(L-11)

[32]

(L-9)

[43]

[35]

[34]

Fig. 4-2-16

Fig. 4-2-14

[38]

[36]

(P-6)

[37]

(C-7)

[41]

[39]

turn

(C-6)

[40]

turn

(L-10)

[42]

turn

Fig. 4-2-15

[48]

[47]

Slide

Fig. 4-2-17

4-10

4-3 ALIGNMENT PROCEDURES OF MECHANISM

The following procedures describe how to align the
individual gears and levers that make up the tape
loading/unloading mechanism. Since information
about the state of the mechanism is provided to the
System Control Circuit only through the Mode Switch,
it is essential that the correct relationship between
individual gears and levers be maintained.

All alignments are to be performed with the mech­anism in Eject mode, in the sequence given. Each

procedure assumes that all previous procedures have
been completed.

IMPORTANT:

If any one of these alignments is not performed
properly, even if off by only one tooth, the unit will
unload or stop and it may result in damage to the
mechanical or electrical parts.

Alignment points in Eject Position

Top View

Alignment 3

Alignment 1

Loading Arm (SP) and (TU) Assembly

Install Loading Arm (SP) and (TU) Assembly so
that their triangle marks point to each other as
shown in Fig. 4-3-2.

Alignment 2

Mode Gear

Keeping the two triangles pointing at each other,

install the Loading Arm (TU) Assembly so that the
last tooth of the gear meets the most inside teeth
of the Mode Gear. See Fig. 4-3-2.

Triangle Marks

Loading Arm
(TU) Assembly

Alignment 1

Loading Arm
(SP) Assembly

Last Tooth

Alignment 2

Most inside teeth
of Mode Gear(LM)

Mode Gear(LM)

Fig. 4-3-2

Bottom View

Alignment 1

Alignment 2

Fig. 4-3-1

Alignment 3

Cam Gear (A)(HI), Rack Assembly

Install the Rack Assembly so that the first tooth on
the gear of the Rack Assembly meets the first
groove on the Cam Gear (A)(HI) as shown in Fig.
4-3-3.

Top View

First groove
on the Cam Gear (A)(HI)

Cam Gear (A)(HI)

Gear on Rack Assembly

Alignment 3

First tooth

Fig. 4-3-3

4-11

5

ADJUSTMENT

5-1 PREPARATION FOR SERVICING

5-1-1 How to Enter the Service Mode

About Optical Sensors

Caution:

An optical sensor system is used for the Tape Start
and End Sensors on this equipment. Carefully read
and follow the instructions below. Otherwise the unit
may operate erratically.

What to do for preparation

Insert a tape into the Deck Mechanism Assembly and
press the PLAY button. The tape will be loaded into
the Deck Mechanism Assembly. Make sure the power
is on, connect TP507 (SENSOR INHIBITION) to
GND. This will stop the function of Tape Start Sensor,
Tape End Sensor and Reel Sensors. (If these TPs are
connected before plugging in the unit, the function of
the sensors will stay valid.) See Fig. 5-1-1.

Note: Because the Tape End Sensors are inactive, do
not run a tape all the way to the start or the end of the
tape to avoid tape damage.

Q505

Q504

TP507

S-INH

Fig. 5-1-1

5-1

5-2 FIXTURE AND TAPE FOR ADJUSTMENT

1. Alignment Tape

No. 7099052 (MH-2)

3. Flat Screwdriver

(Purchase Locally)

2. Guide Roller Adj. Screwdriver

No. 7099028

5-2-1 How To Use The Fixtures And Tape

Item No. Name Part No. Adjustment

1 Alignment Tape 7099052

2 Guide Roller Adj. Screwdriver 7099028 I Guide Roller

3 Flat Screwdriver Purchase Locally I X Value Alignment

I Head Switching Point
I Tape Interchangeability Alignment

5-2

5-3 ELECTRICAL ADJUSTMENT INSTRUCTIONS

General Note: "CBA" is an abbreviation for
"Circuit Board Assembly."

NOTE:

1.Electrical adjustments are required after replacing
circuit components and certain mechanical parts. It
is important to do these adjustments only after all
repairs and replacements have been completed.
Also, do not attempt these adjustments unless the
proper equipment is available.

2.To perform these alignment / confirmation proce­dures, make sure that the tracking control is set in
the center position: Press either "CHANNEL L5?? " or
"CHANNEL K" button on the front panel first, then
the "PLAY" button on the front panel.

CH1

CH2

EXT. Syncronize Trigger Point

1.0H

6.5H±1H (412.7µs±60µs)

Figure 1

Switching Pulse

0.5H
V-Sync

5-3-1 Test Equipment Required

1.Oscilloscope: Dual-trace with 10:1 probe,
V-Range: 0.001~50V/Div.,
F-Range: DC~AC-20MHz

2.Alignment Tape (MH-2)

5-3-2 Head Switching Position

Adjustment

Purpose:

To determine the Head Switching point during
playback.

Symptom of Misadjustment:

May cause Head Switching noise or vertical jitter
in the picture.

Test point Adj.Point Mode Input

J23(V-OUT)

TP502(RF-SW)

GND

Tape

VR501

(Switching Point)

(MAIN CBA)

Measurement

Equipment

PLAY

(SP)

Spec.

Reference Notes:

Playback the Alignment tape and adjust VR501 so that
the V-sync front edge of the CH1 video output wave­form is at the 6.5H±1H(412.7µs±60µs) delayed posi­tion from the rising edge of the CH2 head switching
pulse waveform.

-----

MH-2 Oscilloscope

Connections of Measurement Equipment

J23

Main CBA

GND

TP502

6.5H±1H

(412.7µs±60µs)

Oscilloscope

CH1 CH2
Trig. (+)

5-3

5-4 MECHANICAL ALIGNMENT PROCEDURES

Explanation of alignment for the tape to correctly run
starts on the next page. Refer to the information below
on this page if a tape gets stuck, for example, in the
mechanism due to some electrical trouble of the unit.

5-4-1 Service Information

A. Method for Manual Tape Loading/Unloading

To load a cassette tape manually:

1. Disconnect the AC plug.

2. Remove the Top Case and Front Assembly.

3. Insert a cassette tape. Though the tape will not be
automatically loaded, make sure that the cassette
tape is all the way in at the inlet of the Cassette
Holder. To confirm this, lightly push the cassette
tape further in and see if the tape comes back out,
by a spring motion, just as much as you have
pushed in.

4. Turn the LDG Belt in the appropriate direction
shown in Fig. 5-4-1 for a minute or two to complete
this task.

To unload a cassette tape manually:

1. Disconnect the AC plug.

2. Remove the Top Case and Front Assembly.

3. Make sure that the Moving guide preparations are
in the Eject Position.

4. Turn the LDG Belt in the appropriate direction
shown in Fig. 5-4-1 until the Moving guide prepara­tions come to the Eject Position. Stop turning when
the preparations begin clicking or can not be
moved further. However, the tape will be left
wound around the cylinder.

5. Turn the LDG Belt in the appropriate direction con­tinuously, and the cassette tape will be ejected.
Allow a minute or two to complete this task.

B. Method to place the Cassette Holder in the tape-

loaded position without a cassette tape

1. Disconnect the AC Plug.

2. Remove the Top Case and Front Assembly.

3. Turn the LDG Belt in the appropriate direction
shown in Fig. 5-4-1. Release the locking tabs
shown in Fig. 5-4-1 and continue turning the LDG
Belt until the Cassette Holder comes to the tape­loaded position. Allow a minute or two to complete
this task.

Top View

Moving guide T preparation
(Eject Position)

Moving guide S preparation
(Eject Position)

Push the tape
to load it.

Push the locking tab gently to unlock
when loading without a cassette.

UNLOAD
/EJECT

LOAD

Side View

LDG Belt

Fig. 5-4-1

Bottom View

5-4

LDG Belt (B)

UNLOAD
/EJECT

Cam Gear

Fig. 5-4-2

5-4-2 Tape Interchangeability Alignment

Note:
To do these alignment procedures, make sure that the
Tracking Control Circuit is set to the center position
every time a tape is loaded or unloaded. (Refer to
page 5-7, procedure 1-C, step 2.)

Equipment required:

Dual Trace Oscilloscope
VHS Alignment Tape (MH-2)
Guide Roller Adj. Screwdriver
Flat Screwdriver (Purchase Locally)

Note: Before starting this Mechanical Alignment, do all
Electrical Adjustment procedures.

Flowchart of Alignment for tape traveling

Loading (Use a blank tape.)

Adjust the height of the Guide Rollers
(Supply side and take-up side).
(Use a blank tape.) (Page 5-6)

1-A

Not good

Check to see that the tape is not creasing
and that there is no slack on the supply
and take-up side Guide Rollers.
(Use a blank tape.)

1-A

Adjust the X Value for maximum envelope.
(Page 5-6) (Use Alignment Tape.)

Adjust the envelope. (Page 5-7)

Check the envelope.

1-B

1-C

1-C

OK

Adjust the Audio Section.
(Azimuth Alignment) (Page 5-7)

Check the audio output.

1-D

1-D

OK

Not good

Not good

Do the final tape-traveling test to see that
the tape runs normally in play mode with­out creasing or slacking.

1-A

OK

Completion

Check the following:

1. X Value (Page 5-6)

2. Envelope (Page 5-7)

OK

1-B, 1-C

Not good

Adjust the X value and envelope.

1-B, 1-C

5-5

1-A. Preliminary/Final Checking and

Alignment of Tape Path

Purpose:

To make sure that the tape path is well stabilized.

Symptom of Misalignment:

If the tape path is unstable, the tape will be damaged.

Note: Do not use an Alignment Tape for this proce­dure. If the unit is not correctly aligned, the tape may
be damaged.

1. Playback a blank cassette tape and check to see
that the tape runs without creasing at Guide Rollers
[2] and [3], and at points A and B on the lead sur­face. (Refer to Fig. 5-4-3 and 5-4-4.)

2. If creasing is apparent, align the height of the guide
rollers by turning the top of Guide Rollers [2] and
[3] with a Guide Roller Adj. Screwdriver. (Refer to
Fig. 5-4-3 and 5-4-5.)

3. Check to see that the tape runs without creasing at
Take-up Guide Post [4] or without snaking between
Guide Roller [3] and ACE Head. (Fig. 5-4-3 and 5­4-5)

4. If creasing or snaking is apparent, adjust the Tilt
Adj. Screw of the ACE Head. (Fig. 5-4-6)

Azimuth Adj. Screw

ACE Head

Flat
Screwdriver

Tilt Adj. Screw

Fig. 5-4-6

Guide Roller [2]

A

Take-up Guide Post [4]

Lead Surface of Cylinder

Correct

Guide Roller

Tape

Guide Roller [3]

B

Tape

Incorrect

ACE Head

Fig. 5-4-3

Fig. 5-4-4

1-B. X Value Alignment

Purpose:

To align the Horizontal Position of the Audio/Control/
Erase Head.

Symptom of Misalignment:

If the Horizontal Position of the Audio/Control/Erase
Head is not properly aligned, maximum envelope can­not be obtained at the Neutral position of the Tracking
Control Circuit.

1. Connect the oscilloscope to TP301 (C-PB) and
TP501 (CTL) on the Main CBA. Use TP502 (RF­SW) as a trigger.

2. Playback the Gray Scale of the Alignment Tape
(MH-2) and confirm that the PB FM signal is
present.

3. Set the Tracking Control Circuit to the center posi­tion by pressing CH UP button then “PLAY” button
on the unit. (Refer to note on bottom of page
5-7.)

4. Use the Flat Screwdriver so that the PB FM signal
at TP301 (C-PB) is maximum. (Fig. 5-4-6)

5. Press CH UP button on the unit until the CTL wave­form has shifted by approx. +2ms. Make sure that
the envelope is simply attenuated (shrinks in
height) during this process so that you will know
the envelope has been at its peak.

5-6

Take-up Guide
Post

Tape

Fig. 5-4-5

6. Press CH DOWN button on the unit until the CTL
waveform has shifted from its original position (not
the position achieved in step 5, but the position of
CTL waveform in step 4) by approximately -2ms.
Make sure that the envelope is simply attenuated
(shrinks in height) once CTL waveform passes its
original position and is further brought in the minus
direction.

7. Set the Tracking Control Circuit to the center posi­tion by pressing CH UP button and then “PLAY”
button.

1-C. Checking/Adjustment of Envelope

Waveform

Purpose:

To achieve a satisfactory picture and precise tracking.

Symptom of Misalignment:

If the envelope output is poor, noise will appear in the
picture. The tracking will then lose precision and the
playback picture will be distorted by any slight varia­tion of the Tracking Control Circuit.

1. Connect the oscilloscope to TP301 (C-PB) on the
Main CBA. Use TP502 (RF-SW) as a trigger.

2. Playback the Gray Scale on the Alignment Tape
(MH-2). Set the Tracking Control Circuit to the cen­ter position by pressing CH UP button and then
“PLAY” button on the unit. Adjust the height of
Guide Rollers [2] and [3] (Fig. 5-4-3, Page 5-6)
watching the oscilloscope display so that the enve­lope becomes as flat as possible. To do this adjust­ment, turn the top of the Guide Roller with the
Guide Roller Adj. Screwdriver.

3. If the envelope is as shown in Fig. 5-4-7, adjust the
height of Guide Roller [2] (Refer to Fig. 5-4-3) so
that the waveform looks like the one shown in Fig.
5-4-9.

4. If the envelope is as shown in Fig. 5-4-8, adjust the
height of Guide Roller [3] (Refer to Fig. 5-4-3) so
that the waveform looks like the one shown in Fig.
5-4-9.

5. When Guide Rollers [2] and [3] (Refer to Fig.5-4-3)
are aligned properly, there is no envelope drop
either at the beginning or end of track as shown in
Fig. 5-4-9.

Dropping envelope level at the beginning of track.

Dropping envelope level at the end of track.

Fig. 5-4-8

Envelope is adjusted properly. (No envelope drop)

Fig. 5-4-9

Note: Upon completion of the adjustment of Guide
Rollers [2] and [3] (Refer to Fig. 5-4-3), check the X
Value by pushing the CH UP or DOWN buttons alter­nately, to check the symmetry of the envelope. Check
the number of pushes to ensure center position. The
number of pushes CH UP button to achieve 1/2 level
of envelope should match the number of pushes CH
DOWN button from center. If required, redo the “X
Value Alignment.”

1-D. Azimuth Alignment of Audio/Control/

Erase Head

Purpose:

To correct the Azimuth alignment so that the Audio/
Control/Erase Head meets tape tracks properly.

Symptom of Misalignment:

If the position of the Audio/Control/Erase Head is not
properly aligned, the Audio S/N Ratio or Frequency
Response will be poor.

1. Connect the oscilloscope to the audio output jack
on the rear side of the deck.

2. Playback the alignment tape (MH-2) and confirm
that the audio signal output level is 8kHz.

3. Adjust Azimuth Adj. Screw so that the output level
on the AC Voltmeter or the waveform on the oscil­loscope is at maximum. (Fig. 5-4-6)

Fig. 5-4-7

5-7

6

EXPLODED VIEWS AND PARTS LIST

6-1 EXPLODED VIEWS

6-1-1 Cabinet Section

2L011

4

2B9

2B9

JACK CBA
[COMPONENT
REPLACEMENT]

A5

2L011

2L012

2B18

2L011

A2

2L011

2L011

VT-FX340E(UK) only

3

AFV CBA
[COMPONENT
REPLACEMENT]

2

2L022

SENSOR CBA
[COMPONENT
REPLACEMENT]

MAIN CBA
[COMPONENT
REPLACEMENT]

2L022

2L041

SENSOR CBA
[COMPONENT
REPLACEMENT]

2B46

2B8

2L031

2B7

2L041

2L021

2B14

2L099

2L021

2L042

AC1001

2L021

2B5

2L021

2L051

2L021

1

A7

A1X

ABC

6-1

6-1-2 Deck Mechanism View 1 Section

B73

B2

L1191

B10

B411

B567

L1467

B494

4

B9

Mark Description

Floil G-684G or Multemp MH-D
SLIDUS OIL #150

B35

B553

(Blue grease)

3

2

B12

B11

L1053

L1051

L1450

B74

B410

L1450

B121

B126

Chassis Assembly
Top View (Lubricating Point)

B501

L1466

6-2

1

B571

B492

B37

B8

B86

VT-FX340E(UK) only

Chassis Assembly
Bottom View (Lubricating Point)

DEF

6-1-3 Deck Mechanism View 2 Section

Mark Description

Floil G-684G or Multemp MH-D
(Blue grease)

SLIDUS OIL #150
SANKOUL FG84M (Yellow grease)

4

3

B487

B499

B508

B414

B572

B565

B417

B587

B573

B585

B416

B574

B518

B564

B521

B591

B590

B522

B31

B148

B592

B3

L1406

L1151

B525

B584

2

B578

B579

B582

B580

B583

B579

1

View
for A

B568

B581

B559

B516

B133

B551

B513

A

B488

B507

B52

B491

Bottom Side
(Grease point)

Bottom Side (Grease point)

GH I

6-3

6-1-4 Deck Mechanism View 3 Section

L1321

B347

Mark Description

Floil G-684G or Multemp MH-D
SLIDUS OIL #150

L1321

(Blue grease)

4

B355

B354

B483

3

B425

B482

B562

B563

2

B300

B313

B529

B360

B359

B361

B555

1

B303

6-4

B514

JKL

6-2 REPLACEMENT PARTS LIST

6-2-1 Mechanical Parts List

SYMBOL-NO P-NO DESCRIPTION

MECHANISM SECTION

A1X TJ17321 FRONT ASSEMBLY [MX310E(UK)]
A1X TJ17322 FRONT ASSEMBLY [FX340E(UK)]
A2 TJ17323 CASE, TOP

A5 TJ17307 JACK BOARD
A7 TJ17324 PANEL, BOTTOM

!

AC001 TE15235 AC CORD
2B5 TJ15947 SHEILD, CYLINDER
2B7 TJ17305 HEAD SHIELD ASSEMBLY

2B8 TJ15122 BUSH, LED(F)
2B9 TJ16014 CUSHION
2B14 TJ17292 CUSHION(PCB)
2B18 TJ17293 FIBER, TOP CASE
2B46 TJ15314 ROHM HOLDER

2L011 TJ17312 SCREW (3X10)
2L012 TJ17312 SCREW (3X10)
2L021 TJ10119 SCREW (M3X10)
2L022 TJ10119 SCREW (M3X10)
2L031 TJ10176 SCREW (M3X6)

2L041 TJ10177 SCREW (3X8)
2L042 TJ10177 SCREW (3X8)
2L051 TJ15955 SCREW (M3X5)
2L099 TJ15954 SCREW (M3X8)
B2 TJ17325 CYLINDER ASSEMBLY [MX310E(UK)]

SYMBOL-NO P-NO DESCRIPTION

B360 TJ15104 CLEANER ROLLER
B361 TJ15105 POST
B410 TJ17309 PINCH ARM
B411 TJ16906 PINCH SPRING
B414 TS18449 BRAKE(SP)

B416 TS18451 BRAKE(TU)
B417 TJ16944 TENSION SPRING
B425 TJ15185 LOCK LEVER SPRING
B482 TJ16908 CASSETTE PLATE
B483 TJ16909 LOCK LEVER

B487 TJ16911 BAND BRAKE
B488 TJ17198 MODE LEVER
B491 TJ16946 CAM GEAR
B492 TJ17199 MODE GEAR
B494 TJ16915 DOOR OPENER (C)

B499 TJ16916 LEVER HOLDER (T)
B501 TJ16917 WORM HOLDER
B507 TJ14034 REEL WASHER
B508 TJ16947 BRAKE SPRING (S)
B513 TJ10229 CAM WASHER

B514 TJ15202 SCREW RACK
B516 TJ14034 WASHER
B518 TJ15203 WASHER
B521 TJ16948 BRAKE SPRING
B522 TJ15206 POST ASSEMBLY

B2 TS18628 CYLINDER ASSEMBLY [FX340E(UK)]
B3 TS18445 LOADING MOTOR
B8 TS18446 PULLEY ASSEMBLY
B9 TJ16892 MOVING GUIDE (S)
B10 TJ16893 MOVING GUIDE (T)

B11 TJ16894 LOADING ARM(TU)
B12 TJ16895 LOADING ARM(SP)
B31 TS18415 AC HEAD
B35 TS18416 TAPE GUIDE ARM
B37 TJ16956 CAPSTAN MOTOR

B52 TJ15161 CAP BELT
B73 TS17449 FE HEAD
B74 TJ15163 PRISM
B86 TS18447 F BRAKE ASSEMBLY [FX340E(UK)]
B121 TJ16896 WORM

B126 TJ17196 PULLEY
B133 TS18448 IDLER GEAR
B148 TE12612 CAP
B300 TJ16901 DRIVE LEVER (C)
B303 TJ16902 DOOR OPENER (F)

B313 TJ16903 DRIVE SPRING (C)
B347 TJ15987 GUIDE HOLDER
B354 TJ17197 SLIDER(TU)
B355 TJ17308 SLIDER(SP)
B359 TJ15103 CLEANER LEVER

B525 TJ16001 BELT
B529 TJ15106 CLEANER ASSEMBLY
B551 TJ16949 FF ARM
B553 TJ16003 SPRING
B555 TS18422 RACK ASSEMBLY

B557 TJ15215 MOTOR PULLEY
B558 TJ17201 LOADING MOTOR
B559 TS18452 CLUTCH ASSEMBLY
B562 TJ16924 DRIVE LEVER (C)
B563 TJ16925 SLIDER SHAFT

B564 TJ16951 GEAR (M)
B565 TJ16952 SENSOR GEAR
B567 TJ16928 PINCH ARM(B)
B568 TJ16929 BT ARM
B571 TJ15203 WASHER

B572 TJ15203 WASHER
B573 TJ16007 REEL (SP)
B574 TJ16008 REEL (TU)
B578 TJ15306 TR GEAR A
B579 TJ16953 TR GEAR B

B580 TJ17311 TR GEAR C
B581 TJ16172 CENTER GEAR
B582 TJ15311 TR GEAR SPRING
B583 TJ16919 CAM WASHER
B584 TJ15312 TR GEAR SHAFT

6-5

SYMBOL-NO P-NO DESCRIPTION SYMBOL-NO P-NO DESCRIPTION

B585 TJ16009 WASHER
B587 TS18424 TENSION LEVER
B590 TJ17202 BRAKE ARM(TU)
B591 TJ16935 BAND BRAKE
B592 TJ16955 POST

L1051 TJ14055 SCREW (M2.6X6)
L1053 TJ15313 SCREW (M2.6X8)
L1151 TJ10178 SCREW (M3X4)
L1151 TJ15236 SCREW (M2.6X4)
L1191 TJ15313 SCREW (M2.6X8)

L1321 TJ10176 SCREW (M3X6)
L1341 TJ17313 SCREW (2X8)
L1406 TJ15238 SCREW
L1450 TE12971 SCREW (M2.6X5)
L1466 TJ14066 SCREW (M2.6X6)

L1467 TJ15958 SCREW (M2.6X5)

ACCE SSOR IE S

X1 TJ17326 REMOTE CONTROL UNIT [MX310E(UK)]
X1 TJ17327 REMOTE CONTROL UNIT [FX340E(UK)]
X3 TE15231 RF CORD

6-6

6-2-2 Electrical Parts List

Note: Although some parts in the schematic diagrams have different names from those in

the parts list, there is no problem in replacing parts.

SYMBOL-NO P-NO DESCRIPTION

RESISTOR

VR501 TA14561 CARBON P.O.T. 100K OHM B

SEMI-CONDUCTORS

D2 TC10112 SWITCHING DIODE 1SS133(T-77)
D001 TC10752 RECTIFIER DIODE 1N4005
D002 TC10752 RECTIFIER DIODE 1N4005
D003 TC10752 RECTIFIER DIODE 1N4005
D004 TC10752 RECTIFIER DIODE 1N4005

D005 TC12441 RECTIFIER DIODE BA159
D006 TC10112 SWITCHING DIODE 1SS133(T-77)
D007 TC10112 SWITCHING DIODE 1SS133(T-77)
D008 TC10112 SWITCHING DIODE 1SS133(T-77)
D009 TC10112 SWITCHING DIODE 1SS133(T-77)

D011 TE13211 RECTIFIER DIODE BA158
D012 TJ15128 RECTIFIER DIODE FR202
D013 TJ15128 RECTIFIER DIODE FR202
D014 TC10877
D014 TJ14082

D015 TJ14691 ZENER DIODE MTZJT-778.2A
D016 TC10753
D018 TC10112 SWITCHING DIODE 1SS133(T-77)
D019 TC12611 ZENER DIODE DZ-5.1BSBT265
D021 TC10112 SWITCHING DIODE 1SS133(T-77)

SCHOTTKY BARRIER DIODE ERB81-004 [MX310E(UK)]
SCHOTTKY BARRIER DIODE SB340 [FX340E(UK)]

FAST RECOVERY DIODE ERA18-04 [MX310E(UK)]

SYMBOL-NO P-NO DESCRIPTION

IC301 TC12616 IC LA71750AM-MTB
IC451 TC12731 IC LA72648M [FX340E(UK)]
IC501 TJ17297 IC M37762MCA-AC8GP
IC503 TJ15338 IC BR24C02F-W
IC561 TC12618 IC PT6958-FN-TP

IC640 TC12653 IC LC74793JM-TRM

!

Q001 TJ17301 FET 2SK3566
Q002 TE13243 TRANSISTOR KTC3199(BL)
Q003 TE13243 TRANSISTOR KTC3199(BL)
Q004 TC10778 TRANSISTOR KTC3199(Y)

Q051 TJ15342 TRANSISTOR KRA104M
Q052 TC12591 TRANSISTOR KRC103M
Q053 TC10778 TRANSISTOR KTC3199(Y) [FX340E(UK)]
Q054 TE13235 TRANSISTOR KTC3203(Y) [MX310E(UK)]
Q054 TC12301 TRANSISTOR KTC3205(Y) [FX340E(UK)]

Q055 TC10784 TRANSISTOR KTA1266(GR)
Q056 TJ13923 TRANSISTOR KRA103M
Q057 TC12581 TRANSISTOR KTA1281(Y)
Q058 TC12591 TRANSISTOR KRC103M
Q059 TC12591 TRANSISTOR KRC103M

Q101 TC10784 TRANSISTOR KTA1266(GR)
Q102 TC10784 TRANSISTOR KTA1266(GR)
Q151 TC12673
Q152 TC12673 CHIP TRANSISTOR KTC3875Y-RTK [MX310E(UK)]
Q351 TJ17302 CHIP TRANSISTOR KTA1504GR-RTK

CHIP TRANSISTOR KTC3875Y-RTK [MX310E(UK)]

D023 TC12611 ZENER DIODE DZ-5.1BSBT265
D051 TC10752 RECTIFIER DIODE 1N4005
D052 TC10752 RECTIFIER DIODE 1N4005
D053 TC10752 RECTIFIER DIODE 1N4005
D054 TC10752 RECTIFIER DIODE 1N4005

D055 TC10752 RECTIFIER DIODE 1N4005
D056 TJ14689 ZENER DIODE MTZJT-775.6C
D057 TJ13919 ZENER DIODE MTZJT-7710B [FX340E(UK)]
D058 TC10607 ZENER DIODE MTZJT-7733D
D101 TC12613 ZENER DIODE DZ-11BSAT265

D102 TC12613 ZENER DIODE DZ-11BSAT265
D103 TC12613 ZENER DIODE DZ-11BSAT265
D105 TC12613 ZENER DIODE DZ-11BSAT265
D153 TC12613 ZENER DIODE DZ-11BSAT265
D154 TC12613 ZENER DIODE DZ-11BSAT265 [FX340E(UK)]

D155 TC12613 ZENER DIODE DZ-11BSAT265
D156 TC12613 ZENER DIODE DZ-11BSAT265 [FX340E(UK)]
D301 TC10112 SWITCHING DIODE 1SS133(T-77)
D501 TC10112 SWITCHING DIODE 1SS133(T-77)
D502 TJ13898 LED SIR-563ST3F P

D553 TC10112 SWITCHING DIODE 1SS133(T-77)
D701 TC10607 ZENER DIODE MTZJT-7733D
IC1 TC12622 IC MSP3417G-QG-B8

!

IC001 TE13224 PHOTOCOUPLER LTV-817B-F
IC151 TC12615 IC TC4052BF(EL) [MX310E(UK)]

Q352 TC10778 TRANSISTOR KTC3199(Y)
Q401 TC10784 TRANSISTOR KTA1266(GR)
Q402 TE13235 TRANSISTOR KTC3203(Y)
Q403 TJ13923 TRANSISTOR KRA103M
Q405 TJ17303 CHIP TRANSISTOR FMG4A T148

Q406 TC12673 CHIP TRANSISTOR KTC3875Y-RTK
Q451 TJ17304 CHIP TRANSISTOR KRC103S RTK [FX340E(UK)]
Q501 TE13243 TRANSISTOR KTC3199(BL)
Q502 TC12591 TRANSISTOR KRC103M [FX340E(UK)]
Q503 TJ15141 PHOTO TRANSISTOR PT204-6B-12

Q504 TJ15141 PHOTO TRANSISTOR PT204-6B-12
Q551 TE13243 TRANSISTOR KTC3199(BL)
Q552 TC12591 TRANSISTOR KRC103M

TRANSFORMER

!

T001 TJ17306 SWITCHING TRANSFORMER

COILS

L1 5121287 INDUCTOR 10UH
L3 TJ15421 INDUCTOR 18UH

L4 5121287 INDUCTOR 10UH
L001 TA12575 BEAD CORE
L002 TA12575 BEAD CORE

!

L003 TJ17298 LINE FILTER 56MH
L009 TJ13909 CHOKE COIL 47UH

6-7

SYMBOL-NO P-NO DESCRIPTION

L010 TJ13909 CHOKE COIL 47UH
L012 TA12561 INDUCTOR 100UH
L101 TA12575 BEAD CORE
L102 TA12575 BEAD CORE
L251 TJ15419 INDUCTOR 5.6UH

L301 TA12561 INDUCTOR 100UH
L402 TJ13909 CHOKE COIL 47UH
L403 TJ13915 INDUCTOR 47UH
L451 TJ13915 INDUCTOR 47UH [FX340E(UK)]
L452 TJ17299 INDUCTOR 27UH [FX340E(UK)]

L501 TA12561 INDUCTOR 100UH
L561 TJ13914 INDUCTOR 68UH
L562 TA12574 INDUCTOR 56UH
L701 5121287 INDUCTOR 10UH
L702 TJ13909 CHOKE COIL 47UH

L704 TA12556 INDUCTOR 15UH
L851 TJ15138 INDUCTOR 1.8UH

CRYSTALS

X1 TC12623 X'TAL 18.432MHZ

X301 TJ14708 X'TAL 4.433619MHZ
X501 TE15284 X'TAL 12.000MHZ
X502 TJ15148 X'TAL 32.768KHZ(20PPM)

SYMBOL-NO P-NO DESCRIPTION

SW512 TE11957 TACT SWITCH
TU701 TE15282 TUNER UNIT TMDG1-635A [MX310E(UK)]
TU701 TE15283 TUNER UNIT TMDG2-632A [FX340E(UK)]

MISCELLANEOUS

CN1 TE15287 ANGLE PIN HEADER, 9P
CN701 TS17597 AFV PCB ASSEMBLY [FX340E(UK)]

!

F001 TJ14705 FUSE T1.6AL/250V
FH001 TE11084 FUSE HOLDER
FH002 TE11084 FUSE HOLDER

FP562 TC12614 LED DISPLAY LFU-4421-2001A
J902 TA12575 BEAD CORE
JK101 TE15286 RGB CONNECTOR
JK102 TE15286 RGB CONNECTOR
JW001 TE15236 FLAT CABLE (8P) [MX310E(UK)]

JW001 TE15237 FLAT CABLE (11P) [FX340E(UK)]
JW002 TE15236 FLAT CABLE (8P) [MX310E(UK)]
JW002 TE15238 FLAT CABLE (12P) [FX340E(UK)]
PS503 TJ15282 PHOTO INTERRUPTER
RS501 TS17691 REMOTE RECEIVER

SW501 TE11957 TACT SWITCH
SW502 TE11957 TACT SWITCH
SW503 TE11957 TACT SWITCH
SW504 TE11957 TACT SWITCH
SW505 TE11957 TACT SWITCH

SW506 TE15484 LEAF SWITCH
SW507 TE15485 ROTARY MODE SWITCH
SW509 TE11957 TACT SWITCH
SW510 TE11957 TACT SWITCH
SW511 TE11957 TACT SWITCH

6-8

SCHEMATIC, CIRCUIT BOARD AND BLOCK DIAGRAMS

1 SCHEMATIC DIAGRAMS / CBA’S AND TEST POINTS

Standard Notes

WARNING

Many electrical and mechanical parts in this chassis
have special characteristics. These characteristics
often pass unnoticed and the protection afforded by
them cannot necessarily be obtained by using replace­ment components rated for higher voltage, wattage,
etc. Replacement parts that have these special safety
characteristics are identified in this manual and its
supplements; electrical components having such fea­tures are identified by the mark " ! " in the schematic
diagram and the parts list. Before replacing any of
these components, read the parts list in this manual
carefully. The use of substitute replacement parts that
do not have the same safety characteristics as speci­fied in the parts list may create shock, fire, or other
hazards.

Capacitor Temperature Markings

Mark

(B)

Capacity

change rate

±10%

Standard

temperature

20°C -25~+85°C

Temperature

range

Notes:

1. Do not use the part number shown on these draw­ings for ordering. The correct part number is shown
in the parts list, and may be slightly different or
amended since these drawings were prepared.

2. All resistance values are indicated in ohms

3

(K=10

3. Resistor wattages are 1/4W or 1/6W unless other­wise specified.

4. All capacitance values are indicated in µF

(P=10

5. All voltages are DC voltages unless otherwise
specified.

6. Electrical parts such as capacitors, connectors,
diodes, IC’s, transistors, resistors, switches, and
fuses are identified by four digits. The first two dig­its are not shown for each component. In each
block of the diagram, there is a note such as shown
below to indicate these abbreviated two digits.

, M=106).

-6

µF).

(F) +30 - 80% 20°C -25~+85°C

(SR)

(Z) +30 - 80% 20°C -10~+70°C

Capacitors and transistors are represented by the following symbols.

±15%

20°C -25~+85°C

CBA Symbols

(Top View) (Bottom View)

+

Electrolytic Capacitor

(Bottom View)

Transistor or Digital Transistor

E C B

(Top View)

NPN Transistor

E C B

(Top View)

NPN Digital Transistor

E C B

(Top View)

PNP Transistor

E C B

(Top View)

PNP Digital
Transistor

E C B

Schematic Diagram Symbols

Digital Transistor

1

LIST OF CAUTION, NOTES, AND SYMBOLS USED IN THE SCHEMATIC DIAGRAMS ON THE FOLLOWING
PAG ES :

1. CAUTION:

FOR CONTINUED PROTECTION AGAINST FIRE HAZARD, REPLACE ONLY WITH THE SAME TYPE FUSE.

2. CAUTION:

Fixed Voltage (or Auto voltage selectable) power supply circuit is used in this unit.
If Main Fuse (F1001) is blown, first check to see that all components in the power supply circuit are not defec­tive before you connect the AC plug to the AC power supply. Otherwise it may cause some components in the
power supply circuit to fail.

3. Note:

(1) Do not use the part number shown on the drawings for ordering. The correct part number is shown in the parts

list, and may be slightly different or amended since the drawings were prepared.

(2) To maintain original function and reliability of repaired units, use only original replacement parts which are listed

with their part numbers in the parts list section of the service manual.

4. Wire Connectors

(1) Prefix symbol "CN" means "connector" (can disconnect and reconnect).
(2) Prefix symbol "CL" means "wire-solder holes of the PCB" (wire is soldered directly).

5. Voltage indications for PLAY and REC modes on the schematics are as shown below:

The same voltage for
both PLAY & REC
modes

6. How to read converged lines

1-D3

Distinction Area

Line Number

(1 to 3 digits)

Examples:

1. "1-D3" means that line number "1" goes to area "D3".

2. "1-B1" means that line number "1" goes to area "B1".

7. Test Point Information

: Indicates a test point with a jumper wire across a hole in the PCB.

: Used to indicate a test point with a component lead on foil side.

: Used to indicate a test point with no test pin.

123

5.0

5.0
(2.5)

Indicates that the voltage
is not consistent here.

PLAY mode
REC mode

Unit: Volts

3

AREA D3

2

1

ABCD

AREA B1

1-D3

1-B1

: Used to indicate a test point with a test pin.

2

2 WIRING DIAGRAMS

AC CORD

(DECK ASSEMBLY)

ACE HEAD ASSEMBLY

AUDIO

ERASE HEAD

AUDIO HEAD

CONTROL HEAD

FE HEAD

CYLINDER ASSEMBLY

DRUM
MOTOR

VIDEO
(R)1
HEAD

VIDEO
(L)1
HEAD

VIDEO
(L)2
HEAD

VIDEO
(R)2
HEAD

Hi-Fi AUDIO
(L) HEAD

Hi-Fi AUDIO
(R) HEAD

FULL
ERASE HEAD

PG
SENSOR

M

VT-FX340E(UK)

MOTOR

CL287

AE-H

AE-H/FE-H

A-COM

A-PB/REC

CTL(+)

CTL(-)

ANT-IN ANT-OUT

SENSOR CBA

SENSOR CBA

CL504
1
2
3
4
5
6

CAPSTAN MOTOR

MLOADING

M

CAPSTAN
MOTOR

AE-H

1

AE-H/FE-H2

A-COM3

A-PB/REC4

CTL(+)5

6

CTL(-)

CL501

FE-H2

FE-H GND1

CL502

1 AL+12V/+20.5V

P-ON+5V

2
3 C-FG
4

C-F/R

C-CONT5

GND

6

LM-FWD/REV

7

D-CONT8

D-PFG9

GND

10

AL+12V(2)

11

P-ON+15V12

CL253

V(R)-11

V-COM2

3 V(L)-1

V(L)-2

4

V-COM5

V(R)-26

Hi-Fi-A(L)7

Hi-Fi-COM8

Hi-Fi-A(R)9

MAIN CBA

VT-FX340E(UK)

VT-FX340E(UK)

VT-FX340E(UK)

VT-FX340E(UK)

CN701 CN1

1 NU

SIF

2
3 GND
4

TU-AUDIO(R)
TU-AUDIO(L)5
P-ON+5V

6

P-ON+5V

7

IIC-BUS SCL8
IIC-BUS SDA9

CL151 CL101

CL152 CL102

JW002

1 V-OUT1

GND

2
3 V-IN1
4

AL+12V(1)
NU5
A-OUT1(R)

6

JK1-8P-OUT

7

A-IN1(L)8
NU9
A-IN1(R)

10

GND

11

A-OUT1(L)12

JW001

1 V-OUT2

GND

2
3 V-IN2
4

NU
GND5
A-OUT2(R)

6

SC2-IN

7

A-IN2(L)8
A-IN2(R)9
GND

10

A-OUT2(L)

11

1
2
3
4
5
6
7
8
9

1
2
3
4
5
6
7
8

9
10
11
12

1

2

3

4

5

6

7

8

9
10
11

AFV CBA

JACK CBA

JK101,102

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

3

3 SCHEMATIC DIAGRAMS

3-1 Main 1/7 Schematic Diagram

4

3-2 Main 2/7 & Sensor Schematic Diagrams

5

3-3 Main 3/7 Schematic Diagram

6

3-4 Main 4/7 & Jack Schematic Diagram

7

3-5 Main 5/7 Schematic Diagram

CAUTION !

For continued protection against fire hazard,
replace only with the same type fuse.

NOTE :

The voltage for parts in hot circuit is measured using
hot GND as a common terminal.

CAUTION !

Fixed voltage ( or Auto voltage selectable ) power supply circuit is used in this unit.
If Main Fuse (F1001) is blown, check to see that all components in the power supply
circuit are not defective before you connect the AC plug to the AC power supply.
Otherwise it may cause some components in the power supply circuit to fail.

8

3-6 Main 6/7 Schematic Diagram ( VT-FX340E(UK) )

9

3-7 Main 7/7 Schematic Diagram

10

3-8 AFV Schematic Diagram ( VT-FX340E(UK) )

11

4 WAVEFORMS

WF2

UPPER

(TP301 of Main CBA)

WF1

LOWER

(TP502 of Main CBA)

C-PB 10mV x 10
RF-SW 0.5V x 10

5msec

WF3

UPPER

(J23 of Main CBA)

WF1

LOWER

(TP502 of Main CBA)

V-OUT 0.1V x 10
RF-SW 0.5V x 10

50usec

WF3

(J23 of Main CBA)

12

V-OUT E-E

10usec 50mV x 10

5 CIRCUIT BOARD DIAGRAMS

5-1 Main CBA Top View & Sensor CBA Top View

CAUTION !

For continued protection against fire hazard,
replace only with the same type fuse.

NOTE :

The voltage for parts in hot circuit is measured
using hot GND as a common terminal.

CAUTION !

Fixed voltage ( or Auto voltage selectable ) power supply circuit is used in this unit.
If Main Fuse (F1001) is blown, check to see that all components in the power supply
circuit are not defective before you connect the AC plug to the AC power supply.
Otherwise it may cause some components in the power supply circuit to fail.

Sensor CBA Top View

BECAUSE A HOT CHASSIS GROUND IS PRESENT IN THE POWER
SUPPLY CIRCUIT , AN ISOLATION TRANSFORMER MUST BE USED.
ALSO , IN ORDER TO HAVE THE ABILITY TO INCREASE THE INPUT
SLOWLY , WHEN TROUBLESHOOTING THIS TYPE POWER SUPPLY
CIRCUIT , A VARIABLE ISOLATION TRANSFORMER IS REQUIRED.

WF1

J23
V-OUT

VR501

SW-P

WF2

TP502

RF-SW

TP507

S-INH

TP501

CTL

WF3

TP301

C-PB

13

5-2 Main CBA Bottom View

CAUTION !

For continued protection against fire hazard,

replace only with the same type fuse.

NOTE :

The voltage for parts in hot circuit is measured

using hot GND as a common terminal.

CAUTION !

Fixed voltage ( or Auto voltage selectable ) power supply circuit is used in this unit.
If Main Fuse (F1001) is blown, check to see that all components in the power supply
circuit are not defective before you connect the AC plug to the AC power supply.
Otherwise it may cause some components in the power supply circuit to fail.

BECAUSE A HOT CHASSIS GROUND IS PRESENT IN THE POWER
SUPPLY CIRCUIT , AN ISOLATION TRANSFORMER MUST BE USED.
ALSO , IN ORDER TO HAVE THE ABILITY TO INCREASE THE INPUT
SLOWLY , WHEN TROUBLESHOOTING THIS TYPE POWER SUPPLY
CIRCUIT , A VARIABLE ISOLATION TRANSFORMER IS REQUIRED.

14

5-3 Jack CBA Top / Bottom View

Jack CBA Top View

Jack CBA Bottom View

15

5-4 AFV CBA Top / Bottom View ( VT-FX340E(UK) )

AFV CBA Bottom ViewAFV CBA Top View

16

6 BLOCK DIAGRAMS

6-1 Servo/System Control Block Diagram

Q504

ST-S

SENSOR CBA

Q505

END-S

SENSOR CBA

(DECK ASSEMBLY)

ACE HEAD ASSEMBLY

CONTROL
HEAD

CYLINDER ASSEMBLY CAPSTAN MOTOR

PG
SENSOR

DRUM
MOTOR

M

LOADING
MOTOR

CL287

5 5CTL(+)
6 6CTL(-)

M

CL504

CAPSTAN
MOTOR

END-S

M

MAIN CBA

SW507
LD-SW

Q503

T-REEL

AL+5V

PS503TP506

S-REEL

VR501
SW-POINT

CL502

12 P-ON+15V
11

AL+12V(2)

10 GND

D-PFG

9

D-CONT

8

LM-FWD/REV

7

GND

6

C-CONT

5

C-F/R

4

C-FG

3

P-ON+5V

2

AL+12V/+20.5V

1

D502
S-LED

TIMER+5V

AL+5V

FROM/TO
POWER
SUPPLY
BLOCK

AL+5V

P-ON+15V
AL+12V

P-ON+5V
AL+12V/+20.5V

C-POW-SW
P-ON-H
P-DOWN-L
P-OFF-H

Q501

RESET

AL+5V

REC-SAFETY

RS501

REMOTE
SENSOR

SW506

IC501

(SERVO/SYSTEM CONTROL)

KEY- 1

REMOCON-IN

14

LD-SW9

95

CTL(+)
CTL(-)

94
10

ST-S

4

END-S
T-REEL

80

S-REEL79

RESET

34

PG-DELAY

2

REC-SAF-SW

31

D-PFG

90

D-CONT77
LM-FWD/REV

81

C-CONT

76

C-F/R

78

C-FG

87

C-POW-SW

66

P-ON-H

67

P-DOWN-L

86

P-OFF-H

73

VT-MX310E(UK)

KEY- 2

DRV-DATA

DRV-STB
DRV-CLK

AUDIO-SW-1
AUDIO-SW-2

A-MUTE-H

Hi-Fi-H-SW

A-MODE

LINE-MUTE

IIC-BUS SDA

IIC-BUS SCL

D-REC-H

RF-SW

C-ROTA

D-V-SYNC

V-ENV

C-SYNC

H-A-SW

H-A-COMP

68
69
70

29
30

83

19
32
28

72
71
33
18
15
13

58

20DAVN-L

16

17

7

8

6

TP507

SENS-INH

KEY
SWITCH

KEY
SWITCH

IC561 (LED DISPLAY)

DRV-DATA

28

DRV-STB

2

DRV-CLK

1

G1
G2
G3
G4

S1
S2

S7
S8
S9

S10

FP562

LED DISPLAY

23
22
21
20

7
8

13
14
16
17

3

12

5

11

5
6

AUDIO-SW-1
AUDIO-SW-2

IIC-BUS SDA

IIC-BUS SCL

A-MUTE-H

IIC-BUS SDA

IIC-BUS SCL

Hi-Fi-H-SW

LINE-MUTE

IIC-BUS SDA

IIC-BUS SCL

D-V-SYNC

H-A-COMP

VT-FX340E(UK)

TU701(TUNER UNIT)

SDA
SDA
SCL
SCL

IC503 (MEMORY)

SDA
SCL

TO
AUDIO BLOCK

FROM/TO
Hi-Fi AUDIO

A-MODE

D-REC-H

RF-SW

C-ROTA

V-ENV

C-SYNC

DAVN-L

H-A-SW

BLOCK

FROM/TO
VIDEO BLOCK

17

6-2 Video Block Diagram

REC-VIDEO SIGNAL PB-VIDEO SIGNAL MODE: SP/REC

V-OUT1

V-IN1

TU701(TUNER UNIT)

JACK CBA

JK101

Q101

19
20

BUFFER

MAIN CBA

VIDEO-IN

VIDEO-OUT

CL101

1
3 3

6

24

V-OUT1
V-IN1

CL151

1

Q351

BUFFER

WF1

J23

V-OUT

IC501 (OSD)

OSD
CHARACTER

52

MIX

IC301

(Y/C SIGNAL PROCESS)

48
50
52

56

61
63

TUNER

PB/EE

TUNER

IN1

PB/EE

MUTE

IN1

IN2

FRT

IN2

FRT

MUTE

FROM/TO
SERVO/SYSTEM
CONTROL BLOCK

50

BYPASS

DAVN-L
IIC-BUS SDA
IIC-BUS SCL

65

Y. DELAY

DECORDER

LUMINANCE
SIGNAL
PROCESS

AGC

CHARA.
INS.

CCD 1H DELAY

1/2

CHROMINANCE
SIGNAL
PROCESS

FBC

Y/C
MIX

PR

AGC VXO

69684643

SERIAL

7978

R

Y

+

C

R P R P

P

REC FM
AGC

IC640 (VPS)

14

6
7

16

SP

SP

HEAD
AMP

LP

LP
HEAD
AMP

D-REC-H

C-ROTA/RF-SW

D-V-SYNC

H-A-SW

H-A-COMP

V-ENV

C-SYNC

DAVN-L
IIC-BUS SDA
IIC-BUS SCL

VPS-V

96
95
93
94

90
89
88
87

80

70
62
71
83
84
67

V-COM

V-COM

WF1

TP502

RF-SW

CL253

V(R)-1

V(L)-1

V(L)-2

V(R)-2

D-REC-H

RF-SW

C-ROTA

D-V-SYNC

H-A-SW

H-A-COMP

V-ENV

C-SYNC

(DECK ASSEMBLY)

CYLINDER ASSEMBLY

1
2
3
4
5
6

FROM/TO SERVO/SYSTEM
CONTROL BLOCK

VIDEO (R)-1
HEAD

VIDEO (L)-1
HEAD

VIDEO (L)-2
HEAD

VIDEO (R)-2
HEAD

VT-FX340E(UK)

V-OUT2

V-IN2

18

JK102

19
20

Q102

BUFFER

CL102

1

V-OUT2
V-IN2 3

3

CL152

1

58 59

X301

4.433619MHz

2928

21

TP301

C-PB

WF2

6-3 Audio Block Diagram (VT-MX310E(UK))

PB-AUDIO SIGNAL REC-AUDIO SIGNAL Mode : SP/REC

A-IN1(R)
A-IN1(L)
A-OUT1(R)
A-OUT1(L)

A-IN2(R)
A-IN2(L)
A-OUT2(R)
A-OUT2(L)

2
6
1
3

2
6
1
3

JK101

JK102

JACK CBA

CL101

CL102

8
6

8
6

A-IN1

A-OUT1

A-IN2
A-OUT2

CL151

8
6

CL152

8
6

TU701(TUNER UNIT)

AUDIO

TU-AUDIO

21

MAIN CBA

2

IC151 (SWITCHING)

IC301 (AUDIO SIGNAL PROCESS)

TUNER

13

IN1

15

IN2

17

PB-ON
5
6

EQ
AMP

Q151

BUFFER

Q152

BUFFER

98

INV

13

PB/EE
PB/EE

3

R

ATT

PB/EE
IN2

TUNER
PB/EE
IN1
IN1

SW

CTL

ALC

DET

ALC

P

1
5
2
4

12
14
15
11

10

9

LINE
AMP

AUDIO-SW-1
AUDIO-SW-2

MUTE

FROM SERVO/SYSTEM
CONTROL BLOCK

12

11

(DECK ASSEMBLY)

ACE HEAD ASSEMBLY

AUDIO
HEAD

AUDIO
ERASE
HEAD

FE HEAD

FULL
ERASE
HEAD

CL287
A-PB/REC 4
A-COM 3
AE-H 1
AE-H/FE-H 2

CL504
4 A-PB/REC
3 A-COM
1 AE-H
2 AE-H/FE-H

CL501
2 FE-H
1 FE-H-GND

Q401

Q402

BIAS
OSC

Q405
(PB=ON)

+5V

Q406

Q403

1
2

(SWITCHING)

+5V

SP/LP-ON

AUTO
BIAS

7

REC-ON

3

100

REC
AMP

AUDIO HD-SW
CONTROL

16

SERIAL

DECODER

68 69

71

A-MUTE-H
IIC-BUS SDA FROM SERVO/SYSTEM
IIC-BUS SCL

CONTROL BLOCK

19

6-4 Audio Block Diagram (VT-FX340E(UK))

PB-AUDIO SIGNAL REC-AUDIO SIGNAL Mode : SP/REC

MAIN CBA

FROM/TO Hi-Fi
AUDIO BLOCK

(DECK ASSEMBLY)

ACE HEAD ASSEMBLY

AUDIO
HEAD

AUDIO
ERASE
HEAD

N-A-PB
N-A-REC

CL287
A-PB/REC 4
A-COM 3
AE-H 1
AE-H/FE-H 2

CL504
4 A-PB/REC
3 A-COM
1 AE-H
2 AE-H/FE-H

Q401

Q402

BIAS
OSC

+5V

Q406

IC301

(AUDIO SIGNAL PROCESS) 1513 17

TUNER IN2

INV

R

98

ATT

P

REC
AMP

5
6

1
2

PB-ON

EQ
AMP

SP/LP-ON

AUTO
BIAS

7

3

100

IN1

ALC
DET

ALC

LINE
AMP

REC-ON

MUTE

12

11

20

FULL
ERASE
HEAD

FE HEAD

CL501
2 FE-H
1 FE-H-GND

Q403 (SWITCHING)

Q405
(PB=ON)

+5V

AUDIO HD-SW
CONTROL

16

SERIAL

DECODER

68 69

71

A-MUTE-H
IIC-BUS SDA
IIC-BUS SCL

FROM SERVO/SYSTEM
CONTROL BLOCK

6-5 Hi-Fi Audio Block Diagram (VT-FX340E(UK))

REC-AUDIO SIGNALPB-AUDIO SIGNAL Mode : SP/REC

A-IN1(R)
A-IN1(L)
A-OUT1(R)
A-OUT1(L)

A-IN2(R)
A-IN2(L)
A-OUT2(R)
A-OUT2(L)

JACK CBA

JK101

2
6
1
3

JK102

2
6
1
3

CL101

10

12

CL102

11

A-IN1(R)

A-IN1(L) 8

8
6

A-OUT1(R)

A-OUT1(L) 12

9

A-IN2(R)

A-IN2(L) 8

8
6

A-OUT2(R)

A-OUT2(L) 11

10

6

9

6

CL151

CL152

67
65

(Hi-Fi AUDIO SIGNAL PROCESS)

IC451

SW

SW

ALC

ALC

ALC

MAIN CBA

CN701 CN1

4

TU-AUDIO(R)
TU-AUDIO(L)

5

4
5

AFV CBA

IF SIGNAL
PROCESS

OUTPUT
SELECT

CN1

SIF

CN701

22

MUTE-ON

VCO MUTE

MUTE-ON

73
74

72

76
77
75

TU701(TUNER UNIT)

22

SIF OUT

2

AUDIO IN

FROM/TO
AUDIO BLOCK

N-A-REC
N-A-PB

52
56

50
60

10

78
80

62

70

61 71

47

R-CH
INSEL

2
6

L-CH
INSEL

4

+

48

14

15

ALC

R-CH
PNR

L-CH
PNR

P

R

R

P

SW
NOISE

LIM DEV

LIM DEV

SW
NOISE

DO
DET

R-CH
BPF

NOISE
DET

HOLD
PULSE

L-CH
BPF

COMP

VCO

LPF

MIX V/I

LPF

VCO

COMP

LIM

ENV
DET

34 33

R

L

LOGIC

MUTE

37
38

Q451

21
53

39

24

26

27

IIC-BUS SDA
IIC-BUS SCL

A-MODE

LINE-MUTE

Hi-Fi-H-SW

CL253

Hi-Fi-A(R) 9
Hi-Fi-COM 8
Hi-Fi-A(L) 7

FROM/TO SYSTEM
CONTROL BLOCK

CYLINDER
ASSEMBLY

Hi-Fi
AUDIO
(R) HEAD

Hi-Fi
AUDIO
(L) HEAD

21

6-6 Power Supply Block Diagram

AC001

NOTE :
The voltage for parts in hot circuit is measured using
hot GND as a common terminal.

F001
T1.6A L 250V

L003

LINE
FILTER

D001 - D004

BRIDGE
RECTIFIER

CAUTION

FOR CONTINUED PROTECTION AGAINST FIRE HAZARD,
REPLACE ONLY WITH THE SAME TYPE T1.6AL/250V FUSE.

VT-MX310E(UK)

Q051

Q052

Q057

Q058

Q001

T001

2

4

12

13

14

15

CAUTION !

Fixed voltage (or Auto voltage selectable ) power supply circuit is used in this unit.
If Main Fuse (F001) is blown, check to see that all components in the power supply
circuit are not defective before you connect the AC plug to the AC power supply.
Otherwise it may cause some components in the power supply circuit to fail.

MAIN CBAHOT CIRCUIT. BE CAREFUL.

VT-FX340E(UK)

P-ON+15V
P-ON+32V
P-ON-H

Q053

Q055

Q054

AL+12V/+20.5V
AL+9V
AL+12V
C-POW-SW
AL+5V
TIMER+5V
P-ON+5V
P-DOWN-L
P-OFF-H
AL-5V

HOT

Q003

Q002

7

6

IC001

ERROR
VOLTAGE DET

4

Q004
(SHUNT REGULATOR)

1

23

REG

16

11

17

18

Q059

VT-MX310E(UK)

Q056

COLD

22

7 SYSTEM CONTROL TIMING CHARTS

Mode SW : LD-SW

LD-SW Position detection

A/D Input voltage Limit

(Calculated voltage)

3.76V~4.50V
(4.12V)

4.51V~5.00V
(5.00V)

0.00V~0.25V
(0.00V)

1.06V~1.50V
(1.21V)

0.66V~1.05V
(0.91V)

1.99V~2.60V
(2.17V)

1.51V~1.98V
(1.80V)

3.20V~3.75V
(3.40V)

0.26V~0.65V
(0.44V)

4.51V~5.00V
(5.00V)

2.61V~3.19V
(2.97V)

Symbol

EJ

CL

SB

TL

FB

SF

SM

AU

AL

SS

RS

Note:

Note:

EJ RS: Loading FWD (LM-FWD/REV “H”)
RS EJ: Loading REV (LM-FWD/REV “L”)

Stop (A) = Loading
Stop (B) = Unloading

Note:

Symbol Loading Status

EJ Eject
CL Eject ~ REW Reel
SB REW Reel ~ Stop(B)

TL Stop(B) ~ Brake Cancel
FB Brake Cancel ~ FF / REW
SF FF / REW ~ Stop(M), (FF / REW)

SM Stop(M), (FF / REW) ~ Stop(A)

AU Stop(A) ~ Play / REC

AL Play / REC ~ Still / Slow
SS Still / Slow ~ RS (REW Search)
RS RS (REW Search)

23

[ VT-FX340E(UK) ]

Still/Slow Control Frame Advance Timing Chart

1) SP Mode

18 RF-SW

F-AD
(Internal Signal)

The first rise of RF-SW after a rise in F-AD signal

C-DRIVE

PB CTL

78 C-F/R

AT

"L" "L"

"H"

Acceleration Detection (T1)

"Z"

ST

"H"

Stop detection (T2)

Slow Tracking Value

BL

20ms

Reversal Limit Value

24

16 H-A-SW

15 ROTA

STILL FRAME ADVANCE STILL

Fig. 1

2) LP Mode

18 RF-SW

F-AD
(Internal Signal)

The first rise of RF-SW after a rise in F-AD signal

AT

C-DRIVE

PB CTL

78 C-F/R

"H"

"L" "L"

Acceleration Detection (T1)

"Z"

ST

"H"

BL

20ms

Stop detection (T2)

Slow Tracking Value

Reversal Limit Value

16 H-A-SW

15 ROTA

STILL STILL

FRAME ADVANCE

Fig. 2

25

1. EJECT (POWER OFF) -> CASSETTE IN (POWER ON) -> STOP(B) -> STOP(A) -> PLAY -> RS -> FS -> PLAY -> STILL -> PLAY -> STOP(A)

PIN NO.

9

LD-SW

CL/SS
EJ
AU
RS
SF
SM
TL
FB
AL
SB

81

LM-FWD "M"

/REV

C-DRIVE

C-F/R

78

DRUM
RO TATI ON

P-ON

67

A-MUTE-H

83

YCA DATA

"Z"

ON

ON

REC
EE

PB

ST-S/

EJECT

0.2s

END-S

"OFF"

CASS.LOAD

CLEJ

LD-FWD

SB

TL SB

0.8s (MONO)

1.5s (HIFI)

0.2s

0.2s

LD-REV

0.2s

0.7s

0.2s

1.2s

LD-FWD

FB

TL

0.2s

0.4s

0.2s

PAUSE

(SLOW)

PLAY

PLAY

LD-FWD

0.3s

RS

FF

SS

LD-REV

AL

0.2s

FS

LD-FWD

PLAY

LD-FWD

LD-FWD

SM

SF

0.5s

AU

AU

STOP(A)

LD-REV

SMAL AL RS AU AL SS AU AL SM

0.2s

AU

0.2s

REW

LD-FWD

PLAY

SS

PLAY

0.2s

LD-REV

STILL(SLOW)

AL

Refer to STILL/

0.4s

20ms

SLOW TIMING

LD-FWD

0.3s

STOP

/EJECT

LD-REV

STOP(A)

0.2s

20ms

Fig. 3

PLAY

AU

0.4s

CHART Fig. 1, 2.

40ms

0.2s

0.3s

0.8s

1.0s

0.5s

0.2s

40ms

0.8s

33

D-REC-H

DISPLAY

POWER

-OFF

STOP

PLAY RS

STILL

FS

PLAY STOPPLAY

(SLOW)

26

2. STOP(A) -> FF -> STOP(A) -> REW -> STOP(A) -> REC -> PAUSE -> PAUSE or REC -> STOP(A) -> EJECT

STOP

PIN NO.

9

LD-SW

CL/SS
EJ
AU
RS
SF
SM
TL
FB
AL
SB

81
LM-FWD "M"

/REV

C-DRIVE

C-F/R

78

DRUM
ROTATION

P-ON

67

FF

LD-FWD

/EJECT

LD-REV

0.5s

2.5s

LD-FWD

LD-FWD

AU AU

0.4s

40ms

STOP(A)

0.2s

20ms

REW

LD-REV

SF

FF

0.2s

STOP(A)

LD-REV

FB FB SFSF SM SMAL AL SM AL AL ALAU AU SM TL SB EJRS RSSM

SM SF AU AU SS

"Z"

ON

ON

0.2s

0.2s

0.2s

LD-FWD

REW

STOP

/EJECT

LD-FWD

2.5s

LD-FWD

0.5s

0.4s

40ms

LD-REV

STOP(A)

0.2s

20ms

REC

AU

LD-FWD

REC

0.2s

0.2s

REC or

LD-FWD

REC PAUSE

PAUSE

LD-FWD

LD-REV

2.5s Short REV

AL AL AUSS FB CL

SS SS SF

PAUSE

REC

STOP

/EJECT

LD-FWD

1.0s

LD-REV

0.2s

LD-FWD

0.5s

0.4s

40ms

LD-REV

STOP(A)

0.2s

20ms

STOP

/EJECT

LD-REV

0.2s

LD-REV

0.5s

0.1s

0.2s

0.5s

ST-S/

END-S

CASS. UNLD

27

"ON"

EJECT

Fig. 4

A-MUTE-H

83

YCA DATA

D-REC-H

33

DISPLAY

REC
EE

PB

STOP

1.0s

STOPFF

REW STOP

REC

1.2s

RECREC PAUSE STOP

1. EJECT (POWER OFF) -> CASSETTE IN (POWER ON) -> STOP(B) -> STOP(A) -> PLAY -> RS -> FS -> PLAY -> STILL -> PLAY -> STOP(A)

ST-S/

END-S

"OFF"

PAUSE

ON

PAUSE

PLAY

REW

FF

PLAY

PAUSE

OFF

PAUSE

ON

PAUSE

OFF

PLAY

STOP

/EJECT

PIN NO.

9

LD-SW

CL/SS
EJ
AU
RS
SF
SM
TL
FB
AL
SB

81

LM-FWD "M"

/REV

C-DRIVE

C-F/R

78

DRUM

ROTATION

P-ON

67

A-MUTE-H

83

YCA DATA

"Z"

ON

ON

REC
EE

PB

EJECT

0.2s

CASS.LOAD

CLEJ

SB

LD-FWD

TL SB

LD-REV

0.2s

0.2s

0.2s

0.8s (MONO)

1.5s (HIFI)

0.7s

0.2s

1.2s

LD-FWD

FB

TL

0.2s

0.4s

0.2s

LD-FWD

SS

0.3s

RS

LD-REV

SS

AL

0.2s

LD-FWD

PLAY

0.2s

STOP(A)

20ms

LD-FWD

AU

0.2s

0.2s

0.3s

0.8s

LD-FWD

SM

SF

AU

LD-REV

0.5s

SMAL AL RS AU AL SM

AU

0.4s

40ms

1.0s

PLAY

FS

STILL

STILL

NOISE

CANCEL

>5.0s 5.0s

LP/SLP MODE

SP MODE

6ms 6ms160ms80ms

NOISE

CANCEL

1.0s

STILL

0.3s

0.2s

PLAY

LD-REV

STOP(A)

AU

0.2s

0.4s

40ms

0.8s

20ms

Fig. 5

D-REC-H

33

DISPLAY

POWER

-OFF

STOP

PLAY RS

FS

PLAY STOPPLAY

STILL

[ VT-MX310E(UK) ]

28

2. STOP(A) -> FF -> STOP(A) -> REW -> STOP(A) -> REC -> PAUSE -> PAUSE or REC -> STOP(A) -> EJECT

STOP

PIN NO.

9

LD-SW

CL/SS
EJ
AU
RS
SF
SM
TL
FB
AL
SB

81

LM-FWD "M"

/REV

C-DRIVE

C-F/R

78

DRUM
RO TATI ON

P-ON

67

FF

LD-FWD

/EJECT

LD-REV

0.5s

2.5s

LD-FWD

LD-FWD

AU AU

0.4s

40ms

STOP(A)

0.2s

20ms

REW

LD-REV

SF

FF

0.2s

STOP(A)

LD-REV

FB FB SFSF SM SMAL AL SM AL AL ALAU AU SM TL SB EJRS RSSM

SM SF AU AU SS

"Z"

ON

ON

0.2s

0.2s

0.2s

LD-FWD

REW

STOP

/EJECT

LD-FWD

2.5s

LD-FWD

0.5s

0.4s

40ms

LD-REV

STOP(A)

0.2s

20ms

REC

AU

LD-FWD

REC

0.2s

0.2s

REC or

LD-FWD

REC PAUSE

PAUSE

LD-FWD

LD-REV

2.5s Short REV

AL AL AUSS FB CL

SS SS SF

PAUSE

REC

STOP

/EJECT

LD-FWD

1.0s

LD-REV

0.2s

LD-FWD

0.5s

0.4s

40ms

LD-REV

STOP(A)

0.2s

20ms

STOP

/EJECT

LD-REV

0.2s

LD-REV

0.5s

0.1s

0.2s

0.5s

ST-S/

END-S

CASS. UNLD

29

"ON"

EJECT

Fig. 6

A-MUTE-H

83

YCA DATA

D-REC-H

33

DISPLAY

REC
EE

PB

STOP

1.0s

STOPFF

REW STOP

REC

1.2s

RECREC PAUSE STOP

8 IC PIN FUNCTION DESCRIPTIONS

Comparison Chart of Models and Marks

Model Mark

VT-FX340E(UK) A

VT-MX310E(UK) B

IC501( SERVO / SYSTEM CONTROL IC )

“H” ≥ 4.5V, “L” ≤ 1.0V

Pin
No.

1IN

2IN

3IN

4IN

5IN

6IN

7IN

8IN

9IN

10 OUT

11 -

12 -

13 OUT

14 IN

15 OUT

Mark

IN/

OUT

Signal

Name

SC2-IN

PG-DELAY

POW-SAF

END-S

AFC

V-ENV

KEY-1

KEY-2

LD-SW

ST-S

NU Not Used

NU Not Used

D-V- SYNC

REMOCON-INRemote

C-ROTA

Function

Input Signal
from
Pin 8 of
SCART2

Video Head
Switching Pulse
Signal Adjusted
Voltage

P-ON Power
Detection Input
Signal

Tape End
Position
Detect Signal

Automatic
Frequency
Control Signal

Video Envelope
Comparator
Signal

Key Scan Input
Signal 1

Key Scan Input
Signal 2

Deck Mode
Position
Detector Signal

Tape Start
Position
Detector Signal

Dummy V-sync
Output

Control Sensor

Color Phase
Rotary
Changeover
SIgnal

Active

Level

A/D

A/D

A/D

A/D

A/D

A/D

A/D

A/D

A/D

A/D

Hi-z

H/L

H/

L

Pin
No.

16

17

18 OUT

19

20 IN

21 -

22 -

23 -

24 -

25 -

26 -

27 -

28

29

30

31 IN

-

-

32

33 OUT

34 IN

35 IN

IN/

Mark

OUT

B-

AOUT

B-

AIN

B-

AOUT

B-

AOUT

BOUT

A-

BOUT

A-

B-

AIN

Signal

Name

NU Not Used

H-A-SW

NU Not Used

H-A-COMP

RF-SW

NU Not Used

HiFi-H-SW

DAVN-L

NU Not Used

NU Not Used

NU Not Used

NU Not Used

NU Not Used

NU Not Used

NU Not Used

NU Not Used

LINE MUTE

AUDIO-S W­1

NU Not Used

AUDIO-S W­2

NU Not Used

REC-SAF­SW

NU Not Used

A-MODE

D-REC-H

RESET

Xcin Sub Clock

Function

Video Head
Amp Switching
Pulse

Head Amp
Comparator
Signal

Video Head
Switching Pulse

HiFi Audio Head
Switching Pulse

VPS/PDC Data
Receive = “L”

Audio Mute
Control
Signal

Audio IN/OUT
Control Signal

Audio IN/OUT
Control Signal

Recording
Safety SW
Detect (With
Record tab="L"/
With out Record
tab="H")

Hi-Fi Tape
Detection Signal

Delayed Record
Signal

System Reset
Signal
(Reset=”L”)

Active

Level

-

H/L

-

H/L

H/L

-

H/L

L

-

-

-

-

-

-

-

-

L

H/L

-

H/L

-

H

-

L

L

L

-

30

Pin
No.

Mark

IN/

OUT

36 OUT

37 -

38 IN

39 OUT

40 -

41 -

42 -

43 IN

44 IN

45 OUT

46 -

47 -

48 IN

49 -

50 IN

51 -

52 OUT

53 -

54 -

55 -

56 -

57 -

58 IN

59 OUT

60 -

61 -

62 -

63 -

64 -

65 -

66 OUT

67 IN

Signal

Name

Function

Xcout Sub Clock

Vcc Vcc

Xin

Xout

Main Clock
Input

Main Clock
Input

Vss Vss(GND)

NU Not Used

NU Not Used

CLKSEL

IN

OSC

OSC

OUT

Clock Select
(GND)

Clock Input
for letter size

Clock Output for
letter size

NUB Not Used

LP LP

FSC-IN
[4.43MHz]

4.43MHz Clock
Input

OSDVss OSDVss

OSD-V-IN

OSD Video
Signal Input

NU Not Used

OSD-V-OUT

OSD Video
Signal Output

OSDVcc OSDVcc

HLF

LPF Connected
Terminal (Slicer)

NU Not Used

NU Not Used

NU Not Used

Composite

C-SYNC

Synchronized
Pulse

SCART 1 8Pin

8POUT-1

Output Control
Signal

NU Not Used

NU Not Used

NU Not Used

NU Not Used

NU Not Used

NU Not Used

C-POWER-SWCapstan Power

Switching Signal

P-ON-H

Power On
Signal at High

Active

Level

-

-

-

-

-

-

-

L

-

-

-

-

-

-

L

-

L

-

-

-

-

-

PUL

SE

H/L

-

-

-

-

-

-

H/L

H

Pin
No.

Mark

IN/

OUT

68 OUT

69 OUT

70 OUT

71 OUT

72

IN/

OUT

73 OUT

74 -

75 -

76 OUT

77 OUT

78 OUT

79 IN

80 IN

81 OUT

82 -

83 OUT

84 OUT

85 -

86 IN

87 IN

88 -

89 -

90 IN

Signal

Name

Function

LED Clock

DRV-DATA

Driver IC
Control Data

LED Clock

DRV-STB

Driver IC Chip
Select Signal

LED Clock

DRV-CLK

Driver IC
Control Clock

IIC BUS­SCL

IIC BUS­SDA

P-OFF-H

2

I

C BUS Control

Clock

2

C BUS Control

I
Data

Power Off at
High

NU Not Used

NU Not Used

C-CONT

D-CONT

Capstan Motor
Control Signal

Drum Motor
Control Signal

Capstan Motor
FWD/REV

C-F/R

Control Signal
(FWD=”L”/
REV=”H”)

S-REEL

T- R E E L

LM-FWD/
REV

Supply Reel
Rotation Signal

Take Up Reel
Rotation Signal

Loading Motor
Control Signal

NU Not Used

Audio Mute

A-MUTE-H

Control
Signal (Mute =
“H”)

CTL Amp Gain

FF/REW-L

Switching Signal
(FF/REW=”L”)

NU Not Used

Power Voltage

P-DOWN-L

Down Detector
Signal

Capstan Motor

C-FG

Rotation
Detection
Pulse

NU Not Used

NU Not Used

D-PFG

Drum Motor
Pulse Generator

Active

Level

H/L

H/L

H/L

H/L

H/L

L

-

-

PWM

PWM

H/L

PUL

SE

PUL

SE

H/L/
Hi-z

-

H

L

-

L

PUL

SE

-

-

PUL

SE

31

Pin
No.

91 -

92 -

93 -

94 OUT

95 OUT

96 -

97 -

98 -

99 -

100 IN

Mark

IN/

OUT

Signal

Name

AMPVREF
OUT

AMPVREFin

P80/C P80/C Terminal

CTL -

CTL +

AMPC

CTLAMPout

AMPVcc AMPVcc

AVcc

AGC

Function

V-Ref for CTL
AMP

V-Ref for CTL
AMP

Playback/
Record Control
Signal (-)

Playback/
Record Control
Signal (+)

CTL AMP
Connected
Terminal

To Monitor for
CTL AMP
Output

A/D Converter
Power Input/
Standard
Voltage Input

Tuner IF Output
Signal

Active

Level

-

-

-

H/L

H/L

-

PUL

SE

-

-

A/D

Notes:

Abbreviation for Active Level:

PWM -----Pulse Wide Modulation
A/D--------Analog - Digital Converter

32

9 LEAD IDENTIFICATIONS

E C B

BR24C02F-W
CAT24WC02JI

8

1

5

4

BN1L4M-T
BN1F4M-T
BA1F4M-T
KTA1266(GR)
KTC3199(Y,GR,BL)
2SC2785(J.H.F.K)
KRA103M
KRC103M
KTA1281(Y)

LTV-817(B,C)-F

A

K

C

E

E C B

2SC1815-Y(TPE2)
2SC1815-GR(TPE2)
2SC3266-Y (TPE2)
2SC2120-Y(TPE2)
KTC3203(Y)
2SC1815-BL(TPE2)
2SA1020(Y)
KTC3205(Y)
2SA1015-GR(TPE2)

BU4052BCF-E2
TC4053BF(N)
CD4053BCSJX

16

1

9

8

81

100

LC74793JM-TRM

24

1

QSZAB0RMB168
LA71750AM-MTB

80

13

12

51

50

31

RN1511(TE85R)
FMG4A T148

C1 C2

B1 E B2

MSP3417G-QG-B8
MSP3417G-QG-B8-V3

33

34

44

1

23

11

KTA1504GR-RTK
KTA1504Y-RTK
KTC3875Y-RTK
KRC103SRTK

BE

22

12

C

PT204-6B-12
MID-32A22

1

30

2SK3566

PT-6958-FN-TP

28

S

D

G

1

15

14

LA72648M

60

61

C

E

80

1

41

20

40

21

Note:

A: Anode
K: Cathode
E: Emitter
C: Collector
B: Base
R: Reference
S: Source
G: Gate
D: Drain

33

VT-FX340E(UK)
VT-MX310E(UK)

No. 5302ETK Digital Media Division, Tokai