Jvc SR-V10 Service Manual

SERVICE MANUAL

VIDEO CASSETTE RECORDER

SR-V10E,

SR-V10EK

Note:
Most of the schematic diagrams for this model are the same as for the HR-S7950EU model. The schematic
diagram and circuit boards that are different in the case of the HR-S7950EU model are described below.

.

MAIN(SYSCON) SCHEMATIC DIAGRAM page 4-57

.

MAIN(MAIN TERMINAL) SCHEMATIC DIAGRAM page 4-53

.

MAIN CIRCUIT BOARD page 4-55

SPECIFICATIONS

GENERAL

Power requirement : AC 220 V – 240 Vd, 50 Hz/60 Hz
Power consumption

Power on : 18 W
Power off : 3.6 W

Temperature

Operating : 5°C to 40°C

Storage : –20°C to 60°C
Operating position : Horizontal only
Dimensions (WxHxD)

Weight : 3.4 kg
Format : S-VHS/VHS PAL standard
Maximum recording time

(SP) : 240 min. with E-240 video cassette

(LP) : 480 min. with E-240 video cassette

(EP) : 720 min. with E-240 video cassette

VIDEO/AUDIO

Signal system : PAL-type colour signal and CCIR

Recording system : DA4 (Double Azimuth) head helical
Signal-to-noise ratio: 45 dB

Horizontal resolution

(SP/LP) : 250 lines (VHS)

(EP) : 220 lines (VHS)
Frequency range : 70 Hz to 10,000 Hz (Normal audio)
Input/Output : RCA connectors:

(The specifications shown pertain specifically to the model SR-V10E.)

: 400 mm x 94 mm x 270 mm

monochrome signal, 625 lines
50 fields

scan system

400 lines (S-VHS)
350 lines (S-VHS)
20 Hz to 20,000 Hz (Hi-Fi audio)
VIDEO IN x 2, VIDEO OUT x 1,

AUDIO IN x 2, AUDIO OUT x 1
S-Video connectors:
IN x 2, OUT x 1

TUNER/TIMER

TV channel storage capacity
Tuning system : Frequency synthesized tuner

Channel coverage : VHF 47 MHz – 89 MHz/

Aerial output : UHF channels 22 – 69 (Adjustable)
Memory backup time

ACCESSORIES

Provided accessories

Specifications shown are for SP mode unless otherwise
specified.
E.& O.E. Design and specifications subject to change without
notice.

This service manual is printed on 100% recycled paper.

COPYRIGHT © 2002 VICTOR COMPANY OF JAPAN, LTD

: 99 positions (+AUX position)

104 MHz – 300 MHz/
302 MHz – 470 MHz
UHF 470 MHz – 862 MHz

: Approx. 6 months

Estimated figure based on provided
fresh battery; actual performance
may differ.

: RF cable,

S-video cable,
Audio/video cable,
Infrared remote control unit,
“R6” battery x 2,
Lithium battery CR2025,
BNC/RCA adapter x 2

SR-V10E, SR-V10EK V15S2

No.82945

October 2002

TABLE OF CONTENTS

Section Title Page Section Title Page

DIFFERENCE LIST
Important Safety Precautions
INSTRUCTIONS

1. DISASSEMBLY

1.1 Manually removing the cassette tape ........................................ 1-1

1.2 Removing the major parts .......................................................... 1-2

1.2.1 How to read the procedure table .......................................... 1-2

1.2.2 Disassembly procedure ....................................................... 1-2

1.3 Emergency display function ....................................................... 1-4

1.3.1 Displaying the EMG information .......................................... 1-4

1.3.2 Clearing the EMG history ..................................................... 1-4

1.3.3

Details of the OSD display in the EMG display mode

1.3.4 EMG content description ...................................................... 1-6

1.3.5 EMG detail information<1> .................................................. 1-7

1.3.6 EMG detail information<2> .................................................. 1-8

1.3.7 EMG detail information<3> .................................................. 1-8

1.4 Service position .......................................................................... 1-9

1.4.1 How to set the "Service position" ......................................... 1-9

1.5 Jig RCU mode ............................................................................ 1-9

1.5.1 Setting the Jig RCU mode ................................................... 1-9

1.5.2 Setting the User RCU mode ................................................ 1-9

1.6 Mechanism service mode .......................................................... 1-9

1.6.1 How to set the "Mechanism service mode" .......................... 1-9

1.6.2 How to exit from the "Mechanism service mode" ................. 1-9

1.7 Maintenance and inspection .................................................... 1-10

1.7.1 Cleaning ............................................................................. 1-10

1.7.2 Lubrication ......................................................................... 1-10

1.7.3

Suggested servicing schedule for main components

1.8 Sevicing items related to video navigation ............................... 1-10

2. MECHANISM

2.1. Before disassembling/assembling ............................................ 2-1

2.1.1 Notes .................................................................................... 2-1

2.1.2 Mechanism operation check ................................................ 2-1

2.1.3 Setting the mechanism assembling mode ........................... 2-1

2.1.4 Layout of the main mechanism parts ................................... 2-2

2.1.5 Disassembling procedure table ............................................ 2-3

2.2. Replacement of the main mechanism parts .............................. 2-4

2.2.1 Cassette holder .................................................................... 2-4

2.2.2 A/C head .............................................................................. 2-5

2.2.3 Guide arm, pinch roller arm ................................................. 2-6

2.2.4 Idler arm, idler gear 1/2 ........................................................ 2-6

2.2.5

Main brake(T), brake lever, tension arm,reel disk(S/T), Rec safety lever

2.2.6

Press lever, control cam, capstan brake assembly,loading motor assembly

2.2.7 Capstan motor, load gear, control plate ............................... 2-8

2.2.8 Clutch unit assembly, direct gear ......................................... 2-9

2.3. Mechanism timing chart .......................................................... 2-10

3. ADJUSTMENT

3.1 Before adjustment ...................................................................... 3-1

3.1.1 Precaution ............................................................................. 3-1

3.1.2 Required test equipments .................................................... 3-1

3.1.3 Required adjustment tools ................................................... 3-1

3.1.4 Color(colour) bar signal, color(colour) bar pattern ............... 3-1

3.1.5 Switch settings ..................................................................... 3-1

3.1.6

Manual tracking mode (Auto tracking ON/OFF) setting .................

3.1.7

EVR sdjustment .............................................................................

3.2 Mechanism compatibility adjustment ......................................... 3-2

3.2.1 Tension pole position............................................................ 3-3

3.2.2 FM waveform linearity .......................................................... 3-3

3.2.3 Height and tilt of the A/C head ............................................. 3-3

3.2.4 A/C head phase(X-value) ..................................................... 3-4

3.3 Electrical Adjustment.................................................................. 3-4

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

................. 1-10

.............. 2-6

.............. 2-7

3.3.1 Servo circuit ......................................................................... 3-4

3.3.1.1 Switching point ................................................................ 3-4

3.3.1.2 Slow tracking preset ........................................................ 3-5

3.3.2 Video circuit.......................................................................... 3-5

3.3.2.1 EE Y/PB Y(S-VHS/VHS)level.......................................... 3-5

3.3.3 Audio circuit.......................................................................... 3-5

3.3.3.1 Audio REC FM ................................................................ 3-5

3.3.4 Syscon circuit(EU/EK MODEL) ............................................ 3-6

3.3.4.1 Timer clock ...................................................................... 3-6

3.3.5 PAL/SECAM converter circuit(MS MODEL) ......................... 3-6

3.3.5.1 Colour difference level .................................................... 3-6

3.3.5.2 SECAM burst position ..................................................... 3-6

4. CHARTS AND DIAGRAMS

4.1 BOARD INTERCONNECTIONS ................................................ 4-3

4.2 MAIN(VIDEO/N.AUDIO) SCHEMATIC DIAGRAM..................... 4-5

4.3 MAIN(ON SCREEN) SCHEMATIC DIAGRAM........................... 4-7

4.4

MAIN(SECAM) SCHEMATIC DIAGRAM [HR-S6950MS/S7955MS] ...........

4.5 MAIN(FMA) SCHEMATIC DIAGRAM ........................................ 4-9

4.6 MAIN(SYSCON) SCHEMATIC DIAGRAM................................ 4-11

4.7 MAIN(SW.REG) SCHEMATIC DIAGRAM................................ 4-13

4.8 MAIN(TUNER) SCHEMATIC DIAGRAM.................................. 4-15

4.9 MAIN(FRONT) ,MINI FRONT, S-JACK AND ADV.JOG SCHEMATIC DIAGRAM

4.10

MAIN(MAIN TERMINAL) SCHEMATIC DIAGRAM

4.11

2D DIGITAL SCHEMATIC DIAGRAM [HR-S6950EU/S6955MS/S7955MS] ............

4.12

3D/TBC (2M) SCHEMATIC DIAGRAM [HR-S7950EU/S7955EK]

4.13

TERMINAL(S-SUB) SCHEMATIC DIAGRAM

4.14

TERMINAL(I/O) SCHEMATIC DIAGRAM ....................................

4.15

DEMODULATOR SCHEMATIC DIAGRAM ................................

4.16

S-P CONVERTER SCHEMATIC DIAGRAM [HR-S6955MS/S7955MS] .........

4.17 MAIN CIRCUIT BOARD ......................................................... 4-33

4.18 2D DIGITAL AND 3D DIGITAL/2M CIRCUIT BOARDS ......... 4-36

4.19 DEMODULATOR CIRCUIT BOARD ...................................... 4-37

4.20

S-P CONVERTER CIRCUIT BOARD[HR-S6955MS/S7955MS] ......

4.21

TERMINAL CIRCUIT BOARD ...........................................................

4.22

WAVEFORMS ...................................................................................

4.23

VOLTAGE CHARTS ..........................................................................

4.24

REMOTE CONTROLLER

4.25

FDP GRID ASSIGNMENT AND ANODE CONNECTION

4.26

CPU PIN FUNCTION

4.27

SYSTEM CONTROL BLOCK DIAGRAM

4.28

VIDEO BLOCK DIAGRAM

4.29

AUDIO BLOCK DIAGRAM

4.30

MAIN(MAIN TERMINAL) SCHEMATIC DIAGRAM [SR-V10E, SR-V10EK] .

4.31 MAIN CIRCUIT BOARD [SR-V10E, SR-V10EK] ................... 4-55

4.32

MAIN(SYSCON) SCHEMATIC DIAGRAM [SR-V10E, SR-V10EK]..

5. PARTS LIST

5.1 PACKING AND ACCESSORY ASSEMBLY<M1> ...................... 5-1

5.2 FINAL ASSEMBLY<M2> ............................................................ 5-2

5.3 MECHANISM ASSEMBLY<M4> ................................................ 5-4

5.4 ELECTRICAL PARTS LIST ........................................................ 5-6

3-1

MAIN BOARD ASSEMBLY<03> .................................................... 5-6

3-2

3D D/2M BOARD ASSEMBLY<05> ............................................. 5-12

TERMINAL BOARD ASSEMBLY<06> ......................................... 5-13

A/C HEAD BOARD ASSEMBLY<12> .......................................... 5-15

DEMOD BOARD ASSEMBLY<14> .............................................. 5-15

S.JACK BOARD ASSEMBLY<36>............................................... 5-15

ADV.JOG BOARD ASSEMBLY<38> ............................................ 5-15

LOADING MOTOR BOARD ASSEMBLY<55>............................. 5-15

SCHEMATIC DIAGRAM .................. 4-43

................................................................ 4-44

..................................... 4-45

......................................................... 4-47

......................................................... 4-51

.................... 4-23

........................... 4-25

................... 4-19

............... 4-43

...

4-8

4-17

4-21

4-27
4-29
4-31

4-37
4-38
4-39
4-41

4-53

4-57

The following table indicates main different points between models HR-S7950EU, SR-V10E and SR-V10EK.

ITEM

POWER PLUG CEE 3 PIN
BODY COLOR PURE SILVER DARK GRAY
REPEAT TIMES 100 NO LIMIT
MESECAM USED NOT USED
16:9 USED NOT USED
REAR L-1 INPUT USED(SCART) USED(S,V,LR)
REAR L-2 INPUT USED NOT USED
AV OUT S,LR S,V,LR
SATELLITE CONTROLLER TERMINAL
REMOTE PAUSE TERMINAL USED NOT USED
REMOTE TERMINAL NOT USED USED
BROADCASTING STANDARD B/G,D/K I
STEREO DECODER NICAM/A2 NICAM
LITHIUM BATTERY BACKUP NOT USED USED
VCR PLUS SHOVIEW DELUXE SHOWVIEW VCRplus
INSTANT REC MAX TIME 6H NO
REC LINK USED(L-2) USED(L-1)
VPS USED NOT USED
OSD LANGUAGE 13 LANGUAGES ENGLISH
PRESET DOWNLOAD USED NOT USED
DIRECT REC USED NOT USED
TV AUTO POWER ON USED NOT USED
NEXTVIEW LINK USED NOT USED
REPEAT REC, PLAY NOT USED USED
SELECT RETURN POINT (PLAYBACK)
SERIES REC, PLAY NOT USED USED
MODE LOCK NOT USED USED
DAY, TIME INSERT NOT USED USED
REC SAFETY ON/OFF NOT USED USED
LAST FUNCTION MEMORY NOT USED USED
OSD OFF(REC, PLAY) NOT USED USED
WIRED RCU NOT USED USED
DAILY TIMER RECORD NOT USED USED

Note: Mark is same as left.

Mark — is not used.

MODEL

HR-S7950EU

USED NOT USED

NOT USED USED

SR-V10E

SR-V10EK

1

Important Safety Precautions

Connector

Metal sleeve

Prior to shipment from the factory, JVC products are strictly inspected to conform 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.

v

Precautions during Servicing

1. Locations requiring special caution are denoted by labels and
inscriptions on the cabinet, chassis and certain parts of the
product. When performing service, be sure to read and com­ply with these and other cautionary notices appearing in the
operation and service manuals.

2. Parts identified by the symbol and shaded ( ) parts are
critical for safety.
Replace only with specified part numbers.

Note: Parts in this category also include those specified to com-

ply with X-ray emission standards for products using
cathode ray tubes and those specified for compliance
with various regulations regarding spurious radiation
emission.

3. Fuse replacement caution notice.
Caution for continued protection against fire hazard.
Replace only with same type and rated fuse(s) as specified.

4. Use specified internal wiring. Note especially:

1) Wires covered with PVC tubing

2) Double insulated wires

3) High voltage leads

5. Use specified insulating materials for hazardous live parts.
Note especially:

1) Insulation Tape 3) Spacers 5) Barrier

2) PVC tubing 4) Insulation sheets for transistors

6. When replacing AC primary side components (transformers,
power cords, noise blocking capacitors, etc.) wrap ends of
wires securely about the terminals before soldering.

12. Crimp type wire connector
In such cases as when replacing the power transformer in sets
where the connections between the power cord and power
transformer primary lead wires are performed using crimp type
connectors, if replacing the connectors is unavoidable, in or­der to prevent safety hazards, perform carefully and precisely
according to the following steps.

1) Connector part number : E03830-001

2) Required tool : Connector crimping tool of the proper type

which will not damage insulated parts.

3) Replacement procedure

(1) Remove the old connector by cutting the wires at a point

close to the connector.
Important : Do not reuse a connector (discard it).

cut close to connector

Fig.3

(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.

15 mm

Fig.1

7. Observe that wires do not contact heat producing parts
(heatsinks, oxide metal film resistors, fusible resistors, etc.)

8. Check that replaced wires do not contact sharp edged or
pointed parts.

9. When a power cord has been replaced, check that 10-15 kg of
force in any direction will not loosen it.

Power cord

Fig.2

10. Also check areas surrounding repaired locations.

11. Products using cathode ray tubes (CRTs)
In regard to such products, the cathode ray tubes themselves,
the high voltage circuits, and related circuits are specified for
compliance with recognized codes pertaining to X-ray emission.
Consequently, when servicing these products, replace the cath­ode ray tubes and other parts with only the specified parts.
Under no circumstances attempt to modify these circuits.
Unauthorized modification can increase the high voltage value
and cause X-ray emission from the cathode ray tube.

Fig.4

(3) Align the lengths of the wires to be connected. Insert

the wires fully into the connector.

Fig.5

(4) As shown in Fig.6, use the crimping tool to crimp the

metal sleeve at the center position. Be sure to crimp fully
to the complete closure of the tool.

1.25

2.0

5.5

Fig.6

(5) Check the four points noted in Fig.7.

Not easily pulled free

Wire insulation recessed

more than 4 mm

Fig.7

Crimping tool

Crimped at approx. center

of metal sleeve

Conductors extended

1

S40888-01

v

d'

d

Chassis

Power cord,
primary wire

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 original positions, Afterwards, perform the following tests and confirm the specified values in order to verify compli­ance with safety standards.

1. Insulation resistance test

Confirm the specified insulation resistance or greater between power cord plug prongs and
externally exposed parts of the set (RF terminals, antenna terminals, video and audio input
and output terminals, microphone jacks, earphone jacks, etc.). See table 1 below.

2. Dielectric strength test

Confirm specified dielectric strength or greater between power cord plug prongs and exposed
accessible parts of the set (RF terminals, antenna terminals, video and audio input and output
terminals, microphone jacks, earphone jacks, etc.). See table 1 below.

3. Clearance distance

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

Fig. 8

4. Leakage current test

Confirm specified or lower leakage current between 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.).
Measuring Method : (Power ON)
Insert load Z between earth ground/power cord plug prongs and externally exposed accessi­ble parts. Use an AC voltmeter to measure across both terminals of load Z. See figure 9 and
following table 2.

Externally
exposed
accessible part

Z

V

Fig. 9

ab

c

5. Grounding (Class 1 model only)

Confirm specified or lower grounding impedance between earth pin in AC inlet and externally exposed accessible parts (Video in,
Video out, Audio in, Audio out or Fixing screw etc.).

Measuring Method:

Connect milli ohm meter between earth pin in AC inlet and exposed accessible parts. See figure 10 and grounding specifications.

AC inlet

Earth pin

AC Line Voltage

100 V
100 to 240 V
110 to 130 V

110 to 130 V
200 to 240 V

Exposed accessible part

Milli ohm meter

Fig. 10

Region

Japan
USA & Canada

Europe & Australia R 10 MΩ/500 V DC

Region Load Z

Insulation Resistance (R)

≤

R 1 MΩ/500 V DC

≥≥

1 MΩ R 12 MΩ/500 V DC

≤

Table 1 Specifications for each region

Grounding Specifications

Region
USA & Canada
Europe & Australia

Dielectric Strength

AC 1 kV 1 minute
AC 1.5 kV 1 miute
AC 1 kV 1 minute

AC 3 kV 1 minute
AC 1.5 kV 1 minute

(Class 2)
(Class 1)

Grounding Impedance (Z)

≤

Z 0.1 ohm

≤

Z 0.5 ohm

Clearance Distance (d), (d')

≤

d, d' 3 mm

≤

d, d' 4 mm

≤

d, d' 3.2 mm

≤

d 4 mm

≤

d' 8 mm (Power cord)

≤

d' 6 mm (Primary wire)

a, b, cLeakage Current (i)AC Line Voltage

100 V

110 to 130 V

110 to 130 V
220 to 240 V

Note: These tables are unofficial and for reference only. Be sure to confirm the precise values for your particular country and locality.

Japan

USA & Canada

Europe & Australia

Table 2 Leakage current specifications for each region

1 kΩ

0.15 µF

1.5 kΩ

2 kΩ

50 kΩ

2

≤

i 1 mA rms Exposed accessible parts

≤

i 0.5 mA rms

≤

i 0.7 mA peak

≤

i 2 mA dc

≤

i 0.7 mA peak

≤

i 2 mA dc

Exposed accessible parts

Antenna earth terminals

Other terminals

S40888-01

SECTION 1

DISASSEMBLY

1.1 Manually removing the cassette tape

If you cannot remove the cassette tape which is loaded be­cause of any electrical or mechanical failures, manually remove
it by taking the following steps.

(1) Unplug the power cord plug from the power outlet.
(2) Refer to the disassembly procedure of the VCR and perform

the disassembly of the major parts before removing the
mechanism assembly. (See Fig. 1-1a)

Fig. 1-1a

Tension arm assembly

Pole base assembly

Pinch roller arm assembly

(3) Unload the pole base assembly by manually turning the gear

of the loading motor until the pole base assembly is hidden
behind the cassette lid. In doing so, hold the tape by the hand
to keep the slack away from any grease. (See Fig. 1-1b.)
In case of mechanical failures, while keeping the tension arm
assembly free from tension, pull out the tape on the pole
base assembly. Take the spring(a) of the pinch roller arm

assembly off the hook, and detach it from the tape.
(4) Remove the screw (a) of the side frame (L/R).
(5) Hold the slack tape and cassette cover together, lift the

cassette tape, top frame, cassette holder and side frames

(L, R) together from the rear and remove them by dis-

engaging the hooks (a) and (b).

Screw(a)

Cassette tape

Hook(a)

Side frame(L)

Cassette holder

Top frame

Side frame(R)

Screw(a)

Hook(b)

Spring(a)

Fig. 1-1c

(6) Take up the slack of the tape into the cassette. This com-

pletes removal of the cassette tape.

Direction of unloading

Fig. 1-1b

1-1

1.2 Removing the major parts

1.2.1 How to read the procedure table

This table shows the steps for disassembly of the externally
furnished parts and board assemblies. Reverse these steps
when re-assembling them.

<Example>

Step/

Loc No.

Part Name

[1] Top cover, 1-3a

Bracket 2(S1c)

(1) (2) (3) (4) (5)

Fig.
No.

Point Note

4(S1a),(S1b),3(L1a), <Note 1a>
2(SD1a),(P1a),(W1a),
CN1(WR1a),

----------------------------------------

(1) Order of steps in Procedure

When reassembling, perform the step(s) in the reverse order.
These numbers are also used as the identification (location) No. of

parts Figures.
(2) Part name to be removed or installed.
(3) Fig. No. showing procedure or part location.
(4) Identification of part to be removed, unhooked, unlocked,

released, unplugged, unclamped or unsoldered.

P= Spring, W= Washer, S= Screw, L= Locking tab, SD= Solder,

CN**(WR**)= Remove the wire (WR**) from the connector (CN**).

Note:

•

The bracketed ( ) WR of the connector symbol are as­signed nos. in priority order and do not correspond to
those on the spare parts list.

(5) Adjustment information for installation

1.2.2

Disassembly procedure

Step/

Loc No.

Part Name

[1] Top cover

[2] Front panel

assembly CN7005(WR2a) <

--------------------------------------------------------------------------

[HR-S7955MS] CN7001(WR2c)
Mini front board assembly

--------------------------------------------------------------------------

(

ADV. Jog board assembly)2(S2b), Knob assembly

--------------------------------------------------------------------------

(Front S jack board assembly)

[3] Mechanism

assembly (S3a), (S3b) <

(Drum assembly) CN1(WR3b),

(Inertia plate) 4(L3b)

(Roller arm assembly) (S3g), (W3a), (P3a),

[4]

[HR-S6955MS, S7955MS]
S/P Converter board assembly

[5]

Main board assembly

[6] Bottom cover

Fig.
No.

1-2-2d

1-2-2d

--------------------------

Point Note

4(S1a), (S1b)

[HR-S7955MS] <

[HR-S6950EU, S6950MS
HR-S7950EU, S7955EK]
CN7001(WR2a),

--------------------------

CN916(WR2b),
2(S2a), 4(L2a), 3(L2b)

(L2c), (L2d),
PC Support

2(S2c)

1-2-2d

CN2001(WR3a), <

--------------------------

(S3c), (S3d), (S3e)

--------------------------

--------------------------

(L3c)

1-2-2d

CN511(WR4a)
2(S4a), (L4a)

1-2-2d

(S5a), 3(S5b), (L5a)

1-2-2d

3(L6a), 5(L6b), 2(L6c)

Note 2a
Note 2b

Note 2a
Note 3a

<

Note 3b

<

Note 3c

<Note 2a>

• Be careful not to damage the connector and wire etc. during
connection and disconnection.

• When connecting the flat wire to the connector, be careful with
the flat wire direction.

<Note 2b>

• When reattaching the Front panel assembly , make sure that
the door opener of the Side frame (R) is lowered in position
prior to the reinstallation.

• When reattaching the Front panel assembly, pay careful atten­tion to the switch lever of the Front panel assembly not to make
it touch the switch knob of the Main board assembly from the
side.

• When reattaching the Front panel assembly , lift the Cassette
door slightly.

Door
opener

Switch
knob

Switch
lever

<Note 3a>

Side
frame(R)

Fig. 1-2-2a

• When reattaching the Mechanism assembly, secure the screws
(S3a to S3b) in the order of a, b.

<Note 3b>

• When reattaching the Mechanism assembly , be sure to align
the phase of the Rotary encoder on the Main board assembly.

• When reattaching the Mechanism assembly, set the “Mecha­nism assembling mode”. (See “section 2 mechanism”.)

• When reattaching the Mechanism assembly to the Main board
assembly, take care not to damage the sensors and switch on
the Main board assembly.

(S3c)

(S3d)

Mechanism

>

assembly

(S3e)

(S3d)

>

Drum
assembly

<Note 3c>

<Note 3c>

<NOTE>
Attach the Drum assembly appropriately,
since the installation state of the Drum assembly
influences the FM WAVEFORM LINEARITY
greatly.

Fig. 1-2-2b

(S3c)

(S3e)

HOOK

• When reattaching the Drum assembly, secure the screws (S3c
to S3e) in the order of c, d, e.

• When handling the drum assembly alone, hold it by the motor
or shaft. Be careful not to touch other parts, especially the video

>
>
>
>

heads. Also take care not to damage the connectors.

Shaft

Motor

Video heads

Fig. 1-2-2c

1-2

NOTE) INERTIA PLATE should be attached so as to ser small

Roller arm assembly

(S4a)

k

h

ONLY USED FOR
HR-S6955MS,
HR-S7955MS

[2] Front panel

assembly

<Note 2b>

Cassette door

<Note 2b>

Knob assembly

The excessive length portion
of wire should be reat as figure.

diameter of central round hole above.

Inertia plate

(L3b)

(S3g)
(W3a)

(P3a)

<Note 3e>

NOTE) When attaching ROLLER ARM ASS'Y,

attach the hook(L3c) before the spring(P3a).

NOTE) After attached ROLLER ARM ASS'Y,
tighten screw(S3g) with slit washer(W3a).

(L3c)

g

(S4a)

(S5a)

h

[4] S/P conveter board

assembly

k

a

(L4a)

f

h

a

h

f

"Z"

ONLY USED
FOR HR-S7955MS

(L2a)

(L2b)

(L2c)

PC Support

(L2d)

[2]Mini front board

(L2a)

(L2b)

[6] Bottom cover

(L6b)

right side

CN1601

A

(S2a)

(S5b)

b

c'

(L6c)

assembly

f

<Note 2a>

<Note 3a>

Q3003

(L5a)

(WR3b)

(S3a)

e

b

f

DRUM

<Note 3c>

c

JS3001

(L6a)

Drum assembly

d

(S3c)

c'

(S5b)

D3001

Q3002

Switch knob
<Note 2b>

d'

c'

b

b

f

(L6a)

back side

CN916

g

a

<Note 3c>

(S3d)

<Note 3c>

c

d

d'

c'

b

e

Make a crease

A/C HEAD

(WR3a)

<Note 2a>

(S3b)
<Note 3a>

[3] Mechanism assembly

<Note 3b>

d

(S2a)

(S3e)

C

N5001

e

[5]Main board

Insert the bushing of POWER CORD
so as not to twist the cord.

assembly

REAR SIDE

(S5b)

JS3001

b

For the prevention of the DRUM FPC damage.
When you attach the Mechanism assembly on Bottom chassis.
Attach the Mechanism assembly after the positioning boss "z" of the
Bottom chassis is matched to the positioning hole of the Mehcanism assembly.

NOTE) INSERT FFC WIRE TO THE CONNECTOR BEFORE

f

ATTACHING JOG/SW PWB TO F.PANEL.

NOTE)INSERT FFC WIRE TO THE CONNECTOR
BEFORE ATTACHING JOG/SW PWB TO F.PANEL.

Back side

CN7003

(WR2a)
<Note 2a>

ADV. Jog board
assembly

(L6b)

(L6a)

(S2b)

f

f

<Note 2a>

(WR4a)

back side

Make a crease

(WR3a)
<Note 2a>

CN511

CN2001

<Phase alignment>
Accord the position of V gap on R. Encoder and PWB silk " ".
Accord the position of Boss on R. Encoder and PWB silk " ".

NOTE) WHEN YOU FIX FRONT S Jack PWB WITH THE SCREW.

PUT JIG UNDER FRONT PANEL ASS'Y.

Front panel assembly back side

Switch lever

<Note 2b>

CN5001

(S1a)

[1] Top cover

(S1a)

(S1b)

Front S Jack board assembly

CN7108

(WR2b)
<Note 2a>

(S2c)

NOTE

1. Insert direction of FFC WIRE as follows.

Right side Back side

electrode side

2. FFC WIRE and DRUM FPC WIRE should
be insert as follows.

OK

90°

CN

3. Insert direction of POWER CORD.

U/U(C)/JPN

WHITE LINE

supporting side

NG

CN CN

Except U/U(C)/JPN

BLUE

(WR2b)

<Note 2a>

To Front S Jack board assembly

Fig. 1-2-2d

CN7001

To Adv. Jog board assembly

right side

(WR2a)
<Note 2a>

B

DETAIL "A"

About 5cm

Make a crease

NEUTRAL

Make a crease

P/S CONV PWB

NEUTRAL

CN5001

ONLY USED
FOR HR-S7955MS

DETAIL "B"

FRONT PANEL

CN7002

CN7005

(WR2a)

Push the FFC wire from the FRONT PANEL
to rear side.

CN5001

(WR2c)

CN7001

1-3

1.3 Emergency display function

This unit saves details of the last two emergencies as the EMG
history and allows the status of the VCR and the mechanism
of each emergency to be shown both on the display and as
OSD information.
When using the emergency function, it is required to set the
VCR to the Jig RCU mode (the mode in which codes from the
Jig RCU can be received).

Jig RCU

[Data transmitting method]
Depress the “ ” ( 3 ) button
after the data code is set.

CUSTOM CODE
43: A CODE

DATA CODE

INITIAL MODE

0 : 00 : 00

E:**:**

*1 : *2 : 34

*5: *6 : *7

*8: *9 : *10

Normal display (Counter or clock)

EMG content display (E:Latest:Previous) See 1.3.4.
[EMG code display mode]

EMG detail information <1> display See 1.3.5.
[Deck and other mode display mode]

EMG detail information <2> display See 1.3.6.
[Cassette display mode]

EMG detail information <3> display See 1.3.7.
[Deck mode history dispaly mode]

Fig. 1-3-1b EMG display of FDP display model

Fig. 1-3a Jig RCU [PTU94023B]

1.3.1 Displaying the EMG information

The EMG detail of information can be displayed by transmit­ting the code "59" from the Jig RCU.

Note:

•

The EMG detail information <1><2> show the information on
the latest EMG.
It becomes “ – – : – – : – –” when there is no latest EMG
record.

0: 00

E: **

1E: **

1: *1

2: *2

3: 34

4: *5

5: *6

6: *7

7: *8

8: *9

9: *10

Normal display

EMG content display (Latest) See 1.3.4.

EMG content display (Previous) See 1.3.4.

EMG detail information <1> See 1.3.5.
[Deck operation mode]
EMG detail information <1> See 1.3.5.
[Mechanism operation mode]
EMG detail information <1> See 1.3.5.
[Mechanism sensor information and Mechanism mode position]
EMG detail information <2> See 1.3.6.
[Type of the cassette tape in use <1>]
EMG detail information <2> See 1.3.6.
[Winding position of the cassette tape in use]
EMG detail information <2> See 1.3.6.
[Type of the cassette tape in use <2> (Winding area)]
EMG detail information <3> See 1.3.7.
[Previous deck operation mode]
EMG detail information <3> See 1.3.7.
[The deck operation mode of the one before the last]
EMG detail information <3> See 1.3.7.

[The deck operation mode of the one prior to one above]

Fig. 1-3-1a EMG display of 7segment LED display model

<Reference> EMG display of FDP display mode

(1) Transmit the code “59” from the Jig RCU.

The FDP shows the EMG content in the form of “E:**:**”.

<Example 1> E : 01 : 03

Previous EMG

Latest EMG

<Example 2> E : – – : – –

No EMG record

(2) Transmit the code “59” from the Jig RCU again.

The FDP shows the EMG detail information <1> in the form
of “ * 1 : * 2 : 34 ”.

* 1 : Deck operation mode at the moment of EMG
* 2 : Mechanism operation mode at the moment of EMG
3– : Mechanism sensor information at the moment of

EMG

–4 : Mechanism mode position at the moment of EMG

(3) Transmit the code “59” from the Jig RCU once again.

The FDP shows the EMG detail information <2> in the form
of “ * 5 : * 6 : * 7 ”.

* 5 : Type of the cassette tape in use <1> .
* 6 : Winding position of the cassette tape in use
* 7 : Type of the cassette tape in use <2> (Winding area)

(4) Transmit the code “59” from the Jig RCU once again.

The FDP shows the EMG detail information <3> in the form
of “*8 : *9 : *10”.

* 8 : Previous deck operation mode at the moment of

EMG

* 9 : The deck operation mode of the one before the last

at the moment of EMG

* 10 : The deck operation mode of the one prior to one

above at the moment of EMG

(5) Transmit the code “59” from the Jig RCU once again to re-

set the display.

1.3.2 Clearing the EMG history

(1) Display the EMG history.
(2) Transmit the code “36” from the Jig RCU.
(3) Reset the EMG display.

1-4

1.3.3 Details of the OSD display in the EMG display mode

During the EMG display, the OSD shows the data on the deck
mode, etc. The details of the display contents are as follows.

Notes:

•

The display is variable depending on the part No. of the
System Control microcomputer (IC3001) built into the
VCR. In the following, refer to the figure carrying the same
two characters as the top two characters of the part
number of your IC.

•

The sensor information in the OSD display contents is par-

tially different from the mechanism sensor information in
EMG detail information <1>.

[For *HD only]

AA BB CC

DD EE FF

GGGG HHHH

I I JJJJ

KKKK LLLL MMMM

ROM No.

[For MN* only]

AA BB CC DD EE

FF GG HH I I J J

KK LL MM NN OO

PP QQ RR SS T T

UU VV WW XX YY

A A : Deck operation mode (See EMG detail information <1>.)
BB :

Mechanism operation mode (See EMG detail of information <1>.)
C C : Mechanism transition flag
D D : Capstan motor control status
E E : Loading motor control status
F F : Sensor information (See sensor information details.)
GG : Capstan motor speed
HH : Key code (JVC code)
I I : Supply reel winding diameter data, higher 8 bits.
J J : Supply reel winding diameter data, lower 8 bits.
KK : Mechanism sensor information & mechanism mode position

(See EMG detail of information <1>.)
L L : Tape speed data, higher 8 bits.
MM : Tape speed data, lower 8 bits.
N N : Cassette tape type <2>, higher 8 bits.

(See EMG detail of information <2>.)
OO : Cassette tape type <2>, lower 8 bits.

(See EMG detail of information <2>.)
P P : General data display area

Y Y : General data display area

*FF: Sensor information details

<Display>

** h

********

Encoder data
(See Mechanism mode sequence.)

Cassette tab present = 1
Cassette tab broken = 0

Cassette absent = 1
Cassette present = 0

Start sensor

End sensor

A A : Key code (JVC code)
B B : Deck operation mode (See EMG detail information <1>.)

Mechanism operation mode (See EMG detail information <1>.)

CC :
D D : Sensor information (See sensor information details.)
E E : Capstan motor speed (Search, double speed)
F F : Tracking value

GGGG: Cassette tape type <2>, 16 bits.

(See EMG detail information <2>.)

HHHH : Supply reel winding diameter data

I I : Capstan motor speed (FF/REW, double speed)
JJJJ: Tape speed data, lower 8 bits.
KKKK : General data display area
LLLL : General data display area

MMMM : General data display area

*DD: Sensor information details

<Display>

** h

********

Encoder data
(See Mechanism mode sequence.)

Remote pause

End sensor

Start sensor

Cassette tab present = 1
Cassette tab broken = 0

[For both MN*/HD*]

Mechanism mode sequence

Mechanism mode - Encoder data

LSA

LSB

LSC

LSD

No. Position Encoder data

21

Encoder output = Low

or

Trerminal - GND = SHORT

1
2
3
4
5
6
7
8

9
10
11
12

EJECT 0 h = 0000
EJECT1 1 h = 0001
EJECT2 2 h = 0010

ULSTOP 3 h = 0011

UPPER 4 h = 0100

ONSTOP(PLAY) 5 h = 0101

FWD/SS 6 h = 0110

REV/SS 7 h = 0111

OFFSTOP 8 h = 1000

FFREW-BRAKE 9 h = 1001

FFREW A h = 1010
MIDDLE F h = 1111

543

Encoder output = High

or

Trerminal - GND = OPEN

LSD

9876

LSC

LSB

LSA

12345

1110

GND

1-5

1.3.4 EMG content description

EMG contents “E08/E09” are for the model with Dynamic Drum (DD).

Note:

FDP CONTENT CAUSE

E01: Loading EMG

E02:

Unloading EMG

E03: Take Up Reel

Pulse EMG

E04: Drum FG EMG

E05: Cassette Eject

EMG

E06: Capstan FG

EMG

E07: SW Power

Short-Circuit
EMG

E08:

DD Initialized
(Absolute
Position
Sensor) EMG

E09: DD FG EMG

E0A: Supply Reel

Pulse EMG

EU1:
Head clog warning
history

1-6

If the mechanism mode does not change to the next mode within 4 sec­onds after the loading motor starts rotating in the loading direction, while
the mechanism is in the after-loading position (with the tape up against
the pole base), [E:01] is identified and the power is switched OFF.
However, if the tape loading is not completed within 4 seconds after
the loading motor starts rotating in the loading direction, the tape is
simply unloaded and ejected. No EMG data is recorded in this case.

When the mechanism mode cannot be changed to another mode
even when the loading motor has rotated for more than 4 sec­onds in the unloading direction, [E:02] is identified and the power
is turned off.

When the falling edje of the take-up reel pulse has not been gen­erated for more than 4 seconds in the capstan rotating mode,
[E:03] is identified, the pinch rollers are turned off and stopped,
and the power is turned off. In this case, however, the mecha­nism should be in position after tape loading. Note that the reel
EMG is not detected during Slow/Frame advance operations.

When the drum FG pulse has not been input for more than 3 sec­onds in the drum rotating mode, [E:04] is identified, the pinch roll­ers are turned off and stopped, and the power is turned off.

If the cassette does not reach the eject position within about 0.7
seconds after the cassette housing has started the cassette ejec­tion operation, [E:05] is identified, the drive direction is reversed
to load the tape, the mode is switched to STOP mode with the
pinch roller OFF, and the power is switched OFF.
During the cassette insertion process, the drive direction is reversed
and the cassette is ejected if the tape is not up against the pole
base within about 3 seconds after the start of the cassette pulling­in operation. If the cassette does not reach the eject position within
about 0.7 seconds after the drive mode reversal operation, [E:05]
is identified and the power is switched OFF immediately.

When the capstan FG pulse has not been generated for more
than 1 second in the capstan rotating mode, [E:06] is identified,
the pinch rollers are turned off and stopped, and the power is
turned off.However, the capstan EMG is not detected in SLOW/
STILL modes.
Note that, if the part number of the System Control IC begins with
“MN” or “M3”, the capstan EMG is not detected even during the
FF/REW operation.

When short-circuiting of the SW power supply with GND has lasted
for 0.5 second or more, [E:07] is identified, all the motors are
stopped and the power is turned off.

When DD tilting does not complete in 4 seconds, [E:08] is identi­fied, the tilt motor is stopped and the power is turned off.

When the DD FG pulse is not generated within 2.5 seconds, [E:09]
is identified, the tilt motor is stopped and the power is turned off.

When the falling edge of the supply reel pulse has not been gen­erated for more than 10 seconds in the capstan rotating mode,
[E:0A] is identified and the cassette is ejected (but the power is
not turned off). In this case, however, the mechanism should be
in the position after tape loading (with the tape up against the pole
base). Also note that the reel EMG is not detected during Slow/
Frame advance operations.

Presupposing the presence of the control pulse output in the PLAY mode, when the value obtained by mixing the two V.FM output channels (without regard
to the A.FM output) has remained below a certain threshold level for more than 10 seconds, [E:U1] is identified and recorded in the emergency history.
During the period in which the head clog is detected, the FDP shows "U:01" and the OSD repeats the “3 seconds of warning display” and the “7 seconds of
noise picture display” alternately.

EMG code : “E:C1” or “E:U1” / FDP : “U:01” / OSD : “Try cleaning tape.” or “Use cleaning cassette.”
The head clog warning is reset when the above-mentioned threshold has been exceeded for more than 2 seconds or the mode is changed to another mode
than PLAY.

1. The mechanism is locked in the middle of the mode transition during a tape loading operation.

2.

The mechanism overruns during the tape loading operation because the SYSCON cannot recognize
the mechanism mode normally. This problem is due to a cause such as a rotary encoder failure.

3.

Power is not supplied to the loading MDA. (M12V/Vcc/Vref/ICP are disconnected in
the middle.)

1.

The mechanism is locked in the middle of mode transition.

2.

Without an eject signal being sent from the SYSCON, unloading is attempted (i.e. Ejec­tion is attempted while the tape is still inside the mechanism.) because the SYSCON
cannot recognize the mechanism mode normally. This is due to a cause such as a
rotary encoder failure. (Mechanism position: UPPER)

3.

Power is not supplied to the loading MDA. (M12V/Vcc/Vref/ICP are disconnected in the middle.)

1.

The take-up reel pulse is not generated in the FWD transport modes (PLAY/FWD
SEARCH/FF, etc.) because;

1)The idler gear is not meshed with the take-up reel gear because the mechanism mal­functions for some reason.

2)

The idler gear is meshed with the take-up reel gear, but incapable of winding due to

too large mechanical load (abnormal tension);

3)The reel is rotating normally but an FG pulse is not generated due to the take-up reel
sensor failure.

2.

The supply reel pulse is not generated in the REV transport modes (REV SEARCH/
REW, etc.) because;

1) The idler gear is not meshed with the supply reel gear because the mechanism mal-

functions for some reason.

2) The idler gear is meshed with the supply reel gear, but incapable of winding due to

too large a mechanical load (abnormal tension);

3) The reel rotates normally but the FG pulse is not generated due to a supply reel
sensor failure.

3.

Power(SW5V) is not supplied to the reel sensor on the tape winding side.

1.

The drum could not start or the drum rotation has stopped due to too large a load on
the tape, because;

1) The tape tension is abnormally high;

2)

The tape is damaged or a foreign object (grease, etc.) adheres to the tape.

2.

The drum FG pulse did not reach the System controller CPU because;

1) The signal circuit is disconnected in the middle;

2) The FG pulse generator (hall device) of the drum is faulty.

3.

The drum control voltage (DRUM CTL V) is not supplied to the MDA.

4.

Power (M12V) is not supplied to the drum MDA.

1.

The cassette cannot be ejected due to a failure in the drive mechanism of the housing.

2.

When the housing load increases during ejection, the loading motor is stopped because
of lack of headroom in its drive torque.

Housing load increasing factors: Temperature environment (low temperature, etc.),
mechanism wear or failure.

3.

The sensor/switch for detecting the end of ejection are not functioning normally.

4.

The loading motor drive voltage is lower than specified or power (M12V) is not sup­plied to the motor (MDA).

5.

When the user attempted to eject a cassette, a foreign object (or perhaps the user's
hand) was caught in the opening of the housing.

1.

The capstan could not start or the capstan rotation has stopped due to too large a load
on the tape, because;

1) The tape tension is abnormally high (mechanical lock);

2) The tape is damaged or a foreign object (grease, etc.) is adhered to the tape (occur-

rence of tape entangling, etc.).

2.

The capstan FG pulse did not reach the System controller CPU because;

1) The signal circuit is disconnected in the middle;

2) The FG pulse generator (MR device) of the capstans is faulty.

3.

The capstan control voltage (CAPSTAN CTL V) is not supplied to the MDA.

4.

Power (M12V, SW5V) are not supplied to the capstan MDA.

1.

The SW 5 V power supply circuit is shorted with GND.

2.

The SW 12 V power supply circuit is shorted with GND.

1. The absolute value sensor is defective. (The soldered parts have separated.)

2. The pull-up resistor at the absolute sensor output is defective. (The soldered parts have separated.)

3. Contact failure or soldering failure of the pins of the connector (board-to-board) to the absolute value
sensor.

4.

The absolute value sensor data is not sent to the System Controller CPU.

1. The FG sensor is defective. (The soldered parts have separated.)

2. The pull-up resistor at the FG sensor output is defective. (The soldered parts have separated.)

3. Contact failure or soldering failure of the pins of the connector (board-to-board) to the FG sensor.

4. The power (5V) to the sensor is not supplied. (Connection failure/soldering failure)

5. The FG pulse is not sent to the System Controller CPU.

6.

The tilt motor is defective. (The soldered parts have separated.)

7. The drive power to the tilt motor is not supplied. (Connection failure/soldering failure)

8. The tilt motor drive MDA - IC is defective.

9. Auto-recovery of the DD tilting cannot take place due to overrun.

1.

The supply reel pulse is not generated in the FWD transport mode (PLAY/FWD
SEARCH/FF, etc.) because;

1) PLAY/FWD or SEARCH/FF is started while the tape in the inserted cassette is cut in

the middle;

2) A mechanical factor caused tape slack inside and outside the supply reel side of the

cassette shell. In this case, the supply reel will not rotate until the tape slack is re­moved by the FWD transport, so the pulse is not generated until then;

3) The reel is rotating normally but the FG pulse is not generated due to a supply reel

sensor failure.

2.

The take-up reel pulse is not generated in the REV transport mode (REV SEARCH/
REW, etc.).

1) REV SEARCH/REW is started when the tape in the inserted cassette has been cut

in the middle;

2) A mechanical factor caused tape slack inside and outside the take-up reel side of

the cassette shell. In this case, the take-up reel will not rotate until the tape slack is
removed by the REV transport, so the pulse will not be generated until that time;

3) The reel is rotating normally but the FG pulse is not generated due to a take-up reel

sensor failure.

3.

The power (SW 5V) to a reel sensor is not supplied.

Table 1-3-4a

1.3.5 EMG detail information <1>

The status (electrical operation mode) of the VCR and the status
(mechanism operation mode/sensor information) of the mechanism
in the latest EMG can be confirmed based on the figure in EMG
detail information <1> .

[FDP/OSD display]

* 1 : * 2 : 34

* 1 : Deck operation mode at the moment of EMG
* 2 : Mechanism operation mode at the moment of EMG
3– : Mechanism sensor information at the moment of EMG
–4 : Mechanism mod

e position at the moment of EMG

Note:

•

For EMG detailed information <1>, the content of the code
that is shown on the display (or OSD) differs depending on
the parts number of the system control microprocessor
(IC3001) of the VCR. The system control microprocessor parts
number starts with two letters, refer these to the correspond­ing table.

*2 : Mechanism operation mode
[Table of MN*]

Display

00 Command standby (No command to be executed)
01 Immediate Power OFF after EMG occurrence
02 Loading from an intermediate position during mechanism initialization
03 Unloading due to EMG occurrence during mechanism initialization
04 Ejecting cassette (ULSTOP to EJECT)
05 Inserting cassette (EJECT to ULSTOP)
06 Loading tape (ULSTOP to PLAY)
07 Unloading tape (PLAY to ULSTOP)
08 Transition from pinch roller ON to STOP
09 Transition from pinch roller OFF to STOP (PLAY to OFFSTOP)
0A Transition from pinch roller OFF to STOP at power OFF
0B Transition from pinch roller ON to STOP at power ON
0C Transition to PLAY
0D Transition to Search FF
0E Transition to REC
0F Transition to FWD STILL/SLOW
10 Transition to REV STILL/SLOW
11 Transition to Search REV
12 Transition from FF/REW to STOP
13 Transition to FF
14 Transition to REW
15 Tape end detection processing during loading
16 Short FWD/REV at tape sensor ON during unloading
17 Transition to FF/REW brake mode

Mechanism operation mode

*1 : Deck operation mode
[Common table of MN* and HD]

Display

MN* HD*

00 - Mechanism being initialized
01 00 STOP with pinch roller pressure off (or tape present with P.OFF)
02 01 STOP with pinch roller pressure on
03 - POWER OFF as a result of EMG
04 04 PLAY (Normal playback)
0C 0E REC
10 11 Cassette ejected
20 22 FF
21 - Tape fully loaded, START sensor ON, short FF
22 - Cassette identification FWD SEARCH before transition to FF (SP

24 26 FWD SEARCH (variable speed) including x2-speed
2C 2E INSERT REC
40 43 REW
42 - Cassette identification REV SEARCH before transition to REW (SP

44 47 REV SEARCH (variable speed)
4C 4C AUDIO DUB
6C 6E INSERT REC (VIDEO + AUDIO)
84 84 FWD STILL / SLOW
85 85 REV STILL / SLOW
8C 8F REC PAUSE
8D - Back spacing
8E - Forward spacing (FWD transport mode with BEST function)
AC AF INSERT REC PAUSE
AD - INSERT REC back spacing
CC CD AUDIO DUB PAUSE
CD - AUDIO DUB back spacing
EC EF INSERT REC (VIDEO + AUDIO) PAUSE
ED - INSERT REC (VIDEO + AUDIO) back spacing

x7-speed)

x7-speed)

Deck operation mode

[Table of HD*]

Display

00 STOP with pinch roller pressure off
01 STOP with pinch roller pressure on
02 U/L STOP (or tape being loaded)
04 PLAY (Normal playback)
05 PLAY (x1-speed playback using JOG)
0E REC
11 Cassette ejected
22 FF
26 FWD SEARCH (variable speed) including x2-speed
2E INSERT REC
43 REW
47 REV SEARCH
4C AUDIO DUB
6E INSERT REC (VIDEO + AUDIO)
84 FWD STILL/SLOW
85 REV STILL/SLOW
8F REC PAUSE
AF INSERT REC PAUSE
C7 REV SEARCH (x1-speed reverse playback using JOG)
CD AUDIO DUB PAUSE
EF INSERT REC (VIDEO + AUDIO) PAUSE
F0 Mechanism being initialized
F1 POWER OFF as a result of EMG
F2 Cassette being inserted
F3 Cassette being ejected
F4 Transition from STOP with pinch roller pressure on to STOP with pinch roller

pressure off
F5 Transition from STOP with pinch roller pressure on to PLAY
F6 Transition from STOP with pinch roller pressure on to REC
F7 Cassette type detection SEARCH before FF/REW is being executed
F8 Tape being unloaded
F9 Transition from STOP with pinch roller pressure off to STOP with pinch roller

pressure on
FA Transition from STOP with pinch roller pressure off to FF/REW
FB Transition from STOP with pinch roller pressure off to REC.P (T.REC,etc.)
FC Transition from STOP with pinch roller pressure off to cassette type detec-

tion SEARCH
FD Short REV being executed after END sensor on during unloading
FE Tension loosening being executed after tape loading (STOP with pinch roller

pressure on)
FF Tape being unloaded

Mechanism operation mode

1-7

3– : Mechanism sensor information
[Common table of MN* and HD*]

Display

0- Tab broken ON ON ON
1- Tab broken ON
2- Tab broken ON
3- Tab broken ON OFF
4- Tab present ON
5- Tab present
6- Tab present OFF
7- Tab present OFF
8- Tab broken ON ON
9- Tab broken ON
A- Tab broken
B- Tab broken OFF
C- Tab present ON
D- Tab present
E- Tab present OFF
F- Tab present OFF

REC safety SW

Tab broken = 0 Sensor ON = 0 Sensor ON = 0
Tab present = 1 sensor OFF = 1 Sensor OFF = 1

Mechanism sensor information

Start sensor End sensor

ON

OFF

OFF
OFF

ON

ON
OFF
OFF

ON
OFF
OFF

ON
OFF

ON
OFF
OFF OFF

Mechansim

position sensor

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

*5 : Cassette tape type <1>

Display Cassette tape type <1>

00 Cassette type not identified
16

Large reel/small reel (T-0 to T-15/T-130 to T-210) not classified
82 Small reel, thick tape (T-120) identified/thin tape (T-140) identified
84 Large reel (T-0 to T-60) identified
92

Small reel, thick tape (T-130) identified/thin tape (T-160 to T-210) identified
93

Small reel, thick tape/C cassette (T-0 to T-100/C cassette) not classified
C3

Small reel, thick tape/C cassette (T-0 to T-100/C cassette) being classified
D3

Small reel, thick tape/C cassette (T-0 to T-100/C cassette) being classified
E1 C cassette, thick tape (TC-10 to TC-20) identified
E2 Small reel, thick tape (T-0 to T-100) identified
E9 C cassette, thin tape (TC-30 to TC-40) identified
F1

C cassette, thick tape/thin tape (TC-10 to TC-40) not classified

Notes:

•

Cassette tape type

<1>

is identified a few times during mode tran­sition and the identification count is variable depending on the cas­sette tape type. If an EMG occurs in the middle of identification, the
cassette tape type may not be able to be identified.

•

If other value than those listed in the above table is displayed,
the cassette tape type is not identified.

–4 : Mechanism mode position
[Common table of MN* and HD*]

Mechanism

sensor

information

Dis-

play

Deck operation mode

-0 Not established

-1 EJECT EJECT position

-2 EJECT-EJECT1 Intermodal position

-3 EJECT1 EJECT1 position

-4 EJECT1-EJECT2 Intermodal position

-5 EJECT2 EJECT2 position

-6 EJECT2-ULSTOP Intermodal position

Even number
(0, 2, 4, 6, 8,
A, C, E)

-7 ULSTOP ULSTOP position

-8 ULSTOP-UPPER Intermodal position

-9 UPPER Loading (unloading) tape

-A UPPER-ONSTOP Intermodal position

-B ONSTOP PLAY position

-C PLAY-FWD/SS Intermodal position

-D FWD/SS

FWD (FWD Still/Slow) position

-E FWD/SS-REV Intermodal position

-F REV

REV (REV Still/Slow) position

-0 REV-OFFSTOP Intermodal position

-1 OFFSTOP Pinch roller OFF position
Odd number
(1, 3, 5, 7, 9,
B, D, F)

-2

OFFSTOP-FFREWB

Intermodal position

-3 FFREWB FF/REW Brake position

-4 FFREWB-FFREW Intermodal position

-5 FFREW FF/REW position

1.3.6 EMG detail information <2>

The type of the cassette tape and the cassette tape winding posi­tion can be confirmed based on the figure in EMG detail informa­tion <2> .

[FDP/OSD display]

*5 : *6 : *7

* 5 : Type of the cassette tape in use <1>
* 6 : Winding position of the cassette tape in use
* 7 : Type of th

e cassette tape in use

<2>

(Winding area)

Note:

•

EMG detail information <2> is the reference information
stored using the remaining tape detection function of the cas­sette tape. As a result, it may not identify cassette correctly
when a special cassette tape is used or when the tape has
variable thickness.

*6 : Cassette tape winding position

The cassette tape winding position at the moment of EMG is dis­played by dividing the entire tape (from the beginning to the end) in
21 sections using a hex number from “00” to “14”.

“00” : End of winding
“14” : Beginning of winding
“FF” : Tape position not identified

*7 : Cassette tape type <2> (Winding area)

Display

00
04 - 08
05 - 06
05 - 0C
06 - 0C
06 - 0C
07 - 08
09 - 0B
0C - 0D
0D - 0F
0E - 10
10 - 12
10 - 13
11 - 14
12 - 14
13 - 14
13 - 14
13 - 14
13 - 14
15 - 16
16 - 17
17 - 18
19 - 1B

Cassette tape type <2>

Cassette type not identified
C cassette, thick tape TC-10
Small reel, thick tape T-20
C cassette, thick tape TC-20P
C cassette, thin tape TC-40
C cassette, thin tape TC-30
Small reel, thick tape T-40
Small reel, thick tape T-60
Small reel, thick tape T-80(DF-160)
Small reel, thick tape T-90(DF-180)
Small reel, thick tape T-100
Small reel, thin tape T-140
Small reel, thick tape T-120(DF-240)
Small reel, thick tape T-130
Small reel, thin tape T-160
Small reel, thin tape T-210(DF-420)
Small reel, thin tape T-180(DF-360)
Small reel, thin tape T-168
Small reel, thick tape DF-300
Large reel T-20
Large reel T-30
Large reel T-40
Large reel T-60

(Reference) Word data
(Beginning) (End)

(0497 - 0506) (0732 - 0858)

(05A9 - 0661)
(0599 - 05FF) (0AA1 - 0C07)
(0623 - 063D) (0C41 - 0CC3)
(0611 - 0638) (0C0C - 0CB2)

(07CC - 08E5)

(09FD - 0B78)

(0C20 - 0DFC)

(0D31 - 0F3E)

(0E43 - 107F)

(10E1 - 120C)

(1073 - 1313)

(1185 - 1429)
(12D3 - 141F)
(1373 - 14C3)
(1357 - 14C0)
(1395 - 14EE)

(13A8 - 14CE)

(1536 - 1618)
(1647 - 175A)
(1759 - 189C)
(1989 - 1B2F)

Note:

•

The values of cassette tape type <2> in the above table are
typical values with representative cassette tapes.

1.3.7 EMG detail information <3>

Three deck operation modes preceding the deck operation
mode in which the EMG occurs may be confirmed based on
the figures in the EMG information detail <3>. For the contents
of the displayed information, see the table "Deck operation
mode" in section "1.3.5 EMG detail information <1>".

1-8

1.4 Service position

This unit has been designed so that the Mechanism and Main
board assemblies can be removed together from the chassis
assembly. Before diagnosing or servicing the circuit boards,
take out the major parts from the chassis assembly.

1.4.1 How to set the “Service position”

(1) Refer to the disassembly procedure and perform the dis-

assembly of the major parts before removing the Mecha­nism assembly.

(2) Remove the screws that fix the Mechanism assembly to the

Chassis assembly. If any other screws are used to fix the
boards, remove them also.

(3) Remove the combined Mechanism and Main board assem-

blies.
(4) If any other major parts are used, remove them also.
(5) Connect the wires and connectors of the major parts that

have been removed in steps (1) to (4). (Refer to Fig. 1-2-2d.)
(6) Place the combined Mechanism, Main board and other

board assemblies upside down.
(7) Insert the power cord plug into the power outlet and then

proceed with the diagnostics and servicing of the board as-

sembly.

Notes:

•

Before inserting the power cord plug into the power out­let, make sure that none of the electrical parts are able to
short-circuit between the workbench and the board as­sembly.

•

For the disassembly procedure of the major parts and de­tails of the precautions to be taken, see “1.2 Removing
the major parts”.

•

If there are wire connections from the Main board and
Mechanism assemblies to the other major parts, be sure
to remove them (including wires connected to the major
parts) first before performing step (2).

•

When carrying out diagnosis and repair of the Main board
assembly in the “Service position”, be sure to ground both
the Main board and Mechanism assemblies. If they are im­properly grounded, there may be noise on the playback
picture or FDP counter display may move even when the
mechanism is kept in an inoperative status.

•

In order to diagnose the playback or recording of the cas­sette tape, set the Mechanism assembly to the required
mode before placing it upside down. If the mechanism
mode is changed (including ejection) while it is in an up­side down position the tape inside may be damaged.

•

For some models, the mechanism and board assemblies
are attached by connectors only. When carrying out a di­agnosis or repair of the boards in the “Service position”,
make sure that the connectors are not disconnected.

ONLY USED FOR
HR-S6955MS,
HR-S7955MS

CN1601

CN916

CN511

1.5 Jig RCU mode

This unit uses the following two modes for receiving remote
control codes.

1) User RCU mode : Ordinary mode for use by the user.

2) Jig RCU mode : Mode for use in production and servic­ing.

When using the Jig RCU, it is required to set the VCR to the
Jig RCU mode (the mode in which codes from the Jig RCU
can be received). As both of the above two modes are stored
in the EEPROM, it is required to set the VCR back to the User
RCU mode each time that an adjustment is made or to check
that the necessary operations have been completed. These
modes can be set by the operations described below.

1.5.1 Setting the Jig RCU mode

(1) Unplug the power cord plug from the power outlet.
(2) Press and hold the “REC” and “PAUSE” buttons on the VCR

simultaneously, while plugging the power cord plug into the
power outlet.
When the VCR is set to the Jig RCU mode, the symbols
( “ : ” ) in the time display of the FDP are turned off.

1.5.2 Setting the User RCU mode

(1) Turn off the power.
(2) Press the “REC” and “PAUSE” buttons of the VCR simulta-

neously. Alternatively, transmit the code “80” from the Jig
RCU.

1.6 Mechanism service mode

This model has a unique function to enter the mechanism into
every operation mode without loading of any cassette tape. This
function is called the “Mechanism service mode”.

1.6.1 How to set the “Mechanism service mode”

(1) Set the VCR to the Jig RCU mode (the mode in which codes

from the Jig RCU can be received).
(2) Transmit the code “E5” from the Jig RCU.
(3) Release the lug of the Cassette holder and then slide the

Cassette holder toward the direction where the Cassette

holder is loaded by manually.
(4) The cassette holder lowers and, when the loading has com-

pleted, the mechanism enters the desired mode.
When the VCR is set to the Mechanism service mode, the

symbols (“Timer”) in the FDP (LED) are blinked.

1.6.2 How to exit from the "Mechanism service mode"

(1) Unplug the power cord plug from the power outlet.

VR1603

BURST

VR1601

R-Y

VR1602

B-Y

S/P converter
board assembly

VR2251
REC AGC ADJ

TP111

D.FF
TP4001
CTL.P

TP106
PB.FM

TP2253
A.PB.FM

C3025

Timer clock

Fig. 1-4-1a

Main board
assembly

CP3001

CP4001

CN7001

To Adv. jog board assemblyTo Front S jack board assembly

1-9

1.7 Maintenance and inspection

1.7.1 Cleaning

Regular cleaning of the transport system parts is desirable but
practically impossible. So make it a rule to carry out cleaning
of the tape transport system whenever the machine is serv­iced.
When the video head, tape guide and/or brush get soiled, the
playback picture may appear inferior or at worst disappear, re­sulting in possible tape damage.

Note:

Absolutely avoid sweeping the upper drum vertically as

•

this will cause damage to the video head.

(1) When cleaning the upper drum (especially the video head),

soak a piece of closely woven cloth with alcohol and while
holding the cloth onto the upper drum by the fingers, turn
the upper drum counterclockwise.

(2) To clean the parts of the tape transport system other than

the upper drum, use a piece of closely woven cloth or a
cotton swab soaked with alcohol.

(3) After cleaning, make sure that the cleaned parts are com-

pletely dry before using the cassette tape.

A/C head

Video heads

Fig. 1-7-1a

1.7.2 Lubrication

With no need for periodical lubrication, you have only to lubri­cate new parts after replacement. If any oil or grease on con­tact parts is soiled, wipe it off and newly lubricate the parts.

Note:

•

See the “mechanism assembly” diagram of the “parts list”
for the lubricating or greasing spots, and for the types of
oil or grease to be used.

1.7.3 Suggested servicing schedule for main components

The following table indicates the suggested period for such
service measures as cleaning, lubrication and replacement. In
practice, the indicated periods will vary widely according to en­vironmental and usage conditions. However, the indicated com­ponents should be inspected when a set is brought for service
and the maintenance work performed if necessary. Also note
that rubber parts may deform in time, even if the set is not used.

System Parts name

Drum assembly

A/C head

Pinch roller arm assembly

Tape transport

Drive

Other

Full erase head

Tension arm assembly

Capstan motor (Shaft)

Guide arm assembly

Capstan motor

Capstan brake assembly

Main brake assembly

Belt (Capstan)

Loading motor

Clutch unit

Worm gear

Control plate

Rotary encoder

Operation hours

1000H

C,X

C,X

C

C

C

C

C

X

2000H

X

C,X

C

C

C

C

C

X

X

X

X

X

X

X

X

X

C : Cleaning
X : Inspection or Replacement if necessary

1.8 Servicing items related to video navigation

The video navigation function built into this unit works by stor­ing the video navigation data in the internal EEPROM and writ­ing data in the cassette tape simultaneously.
The video navigation data stored in the EEPROM cannot be cop­ied to another EEPROM. Therefore, when the circuit board mount­ing the EEPROM is replaced, the original EEPROM should be
mounted on the new board. This will make the user’s video navi­gation data usable with the new circuit board after replacement.
However, the user’s data cannot be restored if the EEPROM on
the original circuit board is damaged.

Note:

• If the circuit board mounting the EEPROM or the EEPROM
alone has been replaced, it is required to perform confir­mation/re-adjustment on all of the adjustment items us­ing the EVR as well as those which are adjusted by trans­mitting adjustment codes from the Jig RCU.

1-10

SECTION 2

MECHANISM

2.1 Before disassembling

2.1.1 Notes

This model’s mechanism relates closely to the rotary encoder
and system control circuit (the rotary encoder is meshed with
the control cam).
The system control circuit detects the mechanism condition
using the rotary encoder’s phase (internal switch phase).
Therefore, the parts such as the rotary encoder, control plate,
loading gear and control cam need to be installed correctly in
order for the mechanism to operate properly. (For the mecha­nism phase adjustment, refer to the installation of each part.)

• For the disassembly procedure of the major parts of the main
unit and notes, refer to the “section 1 disassembly”.

• Before using a soldering iron, be sure to disconnect the
power plug from the AC outlet.

• Do not touch any of the adjustment points until a defect po­sition is specified.

• When plugging or unplugging the connector, be sure not to
damage the wire.

• Be sure the springs are hooked all the way around and in
the correct direction.

• When performing repairs, take care not to damage a catch,
etc.

2.1.3 Setting the mechanism assembling mode

The mechanism-assembling mode is provided with this mecha­nism. When disassembling and assembling, it is required to
engage this mode.
Set the mode by adopting the following procedures.
(1) Remove the mechanism assembly using the disassembling

procedure.

(2) Turn gear (a) of the loading motor manually to set the mecha-

nism assembly to the eject end mode. Make sure that the
main deck is connected to the guide hole (a) of the drive
lever and the seal (a) of the main deck is connected to the
mark “E” of the control plate. This condition is called the
mechanism-assembling mode.

Seal (a)

“E” mark

CONTROL PLATE

Guide hole (a)

DRIVE LEVER

<Example>

OK NG

not hooked all the

()

way around

Fig. 2-1-1a

2.1.2 Mechanism operation check

When the mechanism is operated without a cassette loaded,
operate the mechanism in the mechanism service mode. (Re­fer to the "section 1 disassembly".)

LOADING MOTOR

Loading

Gear (a)

Unloading

Fig. 2-1-3a

2-1

2.1.4 Layout of the main mechanism parts

Full erase head

Pole base assy

(supply side)

Tension arm assy

Tension arm base

Rec safety lever

T17

T1

T16

T15

T14

T2

Reel disk

(supply side)

Pole base assy

(take-up Side)

T13

Load gear assy

(take-up side)

T12

Idler arm

T3

A/C head

B15

Fig. 2-1-4a

B1

Direct gear

Fixing plate

B2

Main brake assy

T4

(take-up side)

T11

Ider gear 1/2

T10

Load gear assy

B3

(supply side)

T5

Pinch roller arm assy

T6

Lid guide

Guide arm assy

T7

T8

Brake lever

T9

Drive lever

Reel disk
(take-up side)

Side frame(L)

Capstan motor

Capstan brake

Press lever

Control cam

L2

B11

Belt

B14

B13

B12

B10

Loading motor assy

B8

B9

Fig. 2-1-4b

Clutch unit assy

B7

Change lever

B4

Load gear

B5

Control plate

B6

Tension arm lever

Side frame(R)

R1

2-2

Earth spring(1)

Fig. 2-1-4c

L1

Fig. 2-1-4d

2.1.5 Disassembling procedure table

Front(T)/Back(B) of mechanism

Number of removal steps

Earth spring (1)

Top frame

Cassette holder

Side frame (L)

Drive arm

Side frame (R)

Lid guide

Idler arm

Idler gear 1/2

Main brake (T)

Reel disk (T)

Tension arm

Tension arm base

Press lever

Control cam

Capstan brake assy

Loading motor assy

Belt

Fixing plate

Load gear

Loading gear assy (S)

Loading gear assy (T)

Control plate

Clutch unit

Direct gear

Removal parts

Symbols and numbers

Symbols and numbers

(Reference items)
Replacement parts

2.1 Earth spring (1) T 1

2.1 Top frame T 2 1

2.1 Cassette holder T 3 1 2

2.1 Side frame (L) T 3 1 2

2.1Drive arm T51234

2.1 Side frame (R) T 3 1 2

2.2 A/C head T 1

- FE head T/B 1

2.3 Guide arm assy T 1

2.3 Lid guide T 1

2.3

Pinch roller arm assy

T2 1

2.4 Idler arm T 4123

2.4 Idler gear 1/2 T 5123 4

2.5 Main brake assy (T) T 6123 45

2.5 Reel disk (T) T 7123 456

2.5 Tension arm T 6123 45

2.5 Reel disk (S) T 7123 45

2.5 Tension arm base T 7123 45

-T-up head T 8123 45

-T-up lever T 8123 45

2.5Brake lever T8123

456

2.5 Rec safety le ver T 7 1 2 3456

2.6 Press lever B 1

2.6 Control cam B 2

2.6 Capstan brake assy B 3

2.6 Loading motor assy B 4

2.7 Belt B 1

2.7 Capstan motor T/B 2

- Wire holder T/B 1

2.7 Fixing plate B 1

2.7 Load gear B 2

2.7

Loading gear assy(S)

B3

2.7

Loading gear assy(T)

B4

- Pole base assy(S) T/B 4

- Pole base assy(T) T/B 5

- Load gear base B 5

2.7 Control plate B 6

-Drive lever T/B10123456

2.8 Clutch unit B 2

2.8 Direct gear B 3

- Change lever T/B 6 1 2

- Tension arm lever T/B 14 1 2 3 4 5

6

6

67

67

7

1

12

123

1

1

12

123

123

1234

1234

12 345

78 9

1

12

345

6789 101112 13

L1 - - L2 - R1 T6 T12 T11 T4 T10 T16 T15B12B11B13 B9 B10 B2 B4 B3 B1 B5 B8 B15

L1

-

-

L2

­R1
T3

T17

T7
T6
T5

T12
T11

T4

T10
T16
T13
T15

-

­T8

T14
B12
B11
B13

B9

B10
B14

­B2
B4
B3
B1
T1
T2

­B5
T9
B8

B15

B7
B6

This table shows the order of parts removal when replacing each part. For replacement, remove the parts in the order of 1 to 13
shown in the table and install the parts in the reverse order.
The symbol number before each part name shows the number in the figure “Layout of the main mechanism parts”. T and B on the
right of each part name show the side from which the part should be removed (T: From the front of the mechanism, B: From the
rear of the mechanism, T/B: From both sides).

2-3

2.2 Replacement of the main mechanism parts

2.2.1 Cassette holder

2.2.1.1 Removal

(1) Remove the screws (a) and (b).
(2) Hold up the top frame, cassette holder assembly, drive arm

assembly and side frames (L/R) all together and remove
them by releasing the hooks (a) and (b).

Screw (a)

Screw (b)

2.2.1.3 Disassembling

(1) Release hook (a) to remove the earth spring (1) from the

top frame.

(2) Release the catches (a) and (b) and pull the top frame in

the direction shown by the arrow (a) to remove it.
(3) Pull out the side frame (R).
(4) Pull out the cassette holder assembly and drive arm assem-

bly from the side frame (L).

Hook (a)

Catch (a)

Catch (b)

Hook (a)

Hook (b)

Fig. 2-2-1a

2.2.1.2 Installation (phase adjustment)

(1) Turn gear (a) of the loading motor assembly so that the main

deck connects to the guide hole (a) of the drive lever.
(2) Hook the main deck to hooks (a) and (b).
(3) Place the projection of the drive lever to section (a) of the

side frame (R) and install the cassette holder to the main

deck. Make sure that the bosses of the side frame (L/R) con-

nect with the holes (a) and (b) of the main deck.
(4) Secure screws (a) and (b).

Screw (a)

Screw (b)

Hook (a)

Hook (b)

Hole

(a)

Section
(a)

Hole (b)

Guide hole (a)

DRIVE
LEVER

EARTH SPRING(1)

Arrow (a)

TOP FRAME

SIDE
FRAME(L)

CASSETTE HOLDER
Assembly

DRIVE ARM Assembly

SIDE FRAME(R)

Fig. 2-2-1c

2.2.1.4 Assembling (installation and phase adjustment)

(1) Turn gear (a) of the loading motor assembly so that the main

deck connects to the guide hole (a) of the drive lever.

(2) Place the projection of the drive lever on section (a) of the

side frame (R) and install the side frame (R) to the main deck.
(3) Secure screw (b).
(4) Place section (b) of the drive arm on the gear of the side

frame (R). Make sure that the pin of the door opener con-

nects with section (c) of the drive arm.
(5) Place the drive arm on section (d) of the side frame (L) and

install the side frame (L) on the main deck. Be sure to con-

nect the earth spring (1) to the side frame (L).
(6) Secure screw (a).
(7) Turn gear (a) of the loading motor assembly until the drive

arm is vertical.
(8) Place the slit of the side frame (L/R) at the foot of the cas-

sette holder assembly and install the cassette holder.
(9) Place the top frame on the position guide (a) of the side

frame (L/R) and push it in the direction shown by the arrow

(a) for installation.
(10) Hook the earth spring (1) to the hook (a) of the top frame.

2-4

Gear (a)

Fig. 2-2-1b

SIDE FRAME(R)

(Temporary height)

11mm

HEAD BASE

A/C HEAD

Screw (b)

2.2.2 A/C head

2.2.2.1 Removal

(1) Remove screws (a) and (b).
(2) Remove the A/C head together with the head base.
(3) Remove the screws (c), (d) and (e) to remove the spring (a)

and the A/C head from the Head base.

Section (a)

DRIVE LEVER

Cassette Holder Assembly

Screw (a)

Guide hole (a)

Gear (a)

Section (c)

Section

(b)

Screw (e)

Screw (c)

Spring (a)

Screw (a)

HEAD BASE

Screw (d)

A/C HEAD

Screw (b)

Fig. 2-2-2a

2.2.2.2 Installation (initial setting)

To install the A/C head to the head base, secure the screws in
the order of (c), (d) and (e). To make the adjustment easy, tem­porarily elevate the A/C head.

SIDE FRAME(R)

DRIVE ARM(L)

Section (d)

Hook (a)

EARTH SPRING(1)

SIDE FRAME(L)

TOP FRAME

Fig. 2-2-1d

DRIVE ARM(R)

Position guide (a)

Arrow (a)

Fig. 2-2-2b

2-5

2.2.3 Guide arm, pinch roller arm

2.2.3.1 Removal

(1) Remove the spring (a) from the hook (a) and detach the

guide arm assembly.
(2) Release the catch (a) to remove the lid guide.
(3) Remove the spring (b) from the hook (b) and detach the

pinch roller arm assembly.

2.2.4 Idler arm, idler gear 1/2

2.2.4.1 Removal

(1) Release the catches (a) and (b) to detach the idler arm.
(2) Detach the idler gear 1/2.

IDLER ARM

Catch (b)

Pinch roller arm assembly

Hook (a)Guide arm assembly Spring (a)

Catch (a)

Spring (b)

PRESS
LEVER

Hook (b)

LID GUIDE

Catch

(a)

IDLER GEAR 1/2

IDLER ARM

IDLER GEAR 2

IDLER GEAR 1

LID GUIDE

Guide arm assembly

2-6

Fig. 2-2-3a

Pinch roller arm
assembly

PRESS
LEVER

Fig. 2-2-4a

2.2.5 Main brake (T), brake lever, tension arm,
reel disk (S/T), Rec safety lever

2.2.5.1 Removal

(1) Remove the spring (a). (Detach section (b) of the spring (a).)
(2) Release the catch (a) to detach the main brake (T).
(3) Release the catch (b) to detach the reel disk (T) and the

spacer.

(4)

Lift up and turn section (b) of the brake lever counterclockwise

to remove the brake lever.
(5) Remove the spring (b) from the hook (a).
(6) Release the catch (c) to detach the tension arm.
(7) Release the catch (d) to detach the reel disk (S) and the

spacer.
(8) Remove the spring (c) from the hook (b).
(9) Turn the tension arm base in the direction shown by arrow

(a) to release catch (e). Place the projections of the tension

arm base to the holes (a) to detach the tension arm base.
(10) While releasing the catch (f), turn the Rec safety lever

counterclockwise to remove it.

Tension arm assembly

Catch (d)

Catch (c)

Screw (a)

Screw (a)

Loading motor
assembly

Solder (a)

Slit washer (a)

Slit washer
(b)

Catch (b)

Capstan brake assembly

CONTROL CAM

Slit washer (b)

PRESS LEVER

Capstan
brake assembly

CONTROL
CAM

Loading
motor
assembly

Spring (b)

Catch (c)

Hook (a)

Catch (d)

REEL DISK(S)

Main brake (T) assembly

Section (b)

Spring (a)

Spring (a)

BRAKE
LEVER

2.2.6 Press lever, control cam, capstan brake assembly,
loading motor assembly

2.2.6.1 Removal

(1) Remove the slit washer (a) to detach the press lever.
(2) Release the slit washer (b) to detach the control cam.
(3) Release the catch (b) to detach the capstan brake assem-

bly.
(4) Remove the solder (a).
(5) Remove the screw (a).
(6) Release the catches (c) and (d) to detach the loading motor

assembly.

Tension arm base
assembly

REC SAFETY
LEVER

Tension arm base assembly

Arrow (a)

Hole (a)

Catch (e)

Hole (a)

Hook (b)

Catch (a)

Tension arm
assembly

Main brake (T)
assembly

REEL DISK(T)

REEL DISK(S)

SPACER

REEL DISK(T)

Catch (b)

BRAKE
LEVER

Spring (c)

REC
SAFETY
LEVER

Catch (f)

Fig. 2-2-5a

Fig. 2-2-6a

2-7

2.2.6.2 Installation (phase adjustment)

(1) Attach the loading motor assembly to the main deck.
(2) Secure the screw (a).
(3) Solder the wire to section (a).
(4) Arrange the wire along with the position guide (b).
(5) Attach the capstan brake assembly to the main deck.
(6) Place the main deck on the guide hole (a) of the control plate.
(7) Place the main deck on the guide hole (b) of the drive lever.
(8) Place the main deck no guide hole (c) of the control cam to

install the control cam.

(9) Move the capstan brake in the direction shown by the arrow

(a) to attach the press lever to the shaft (a). Make sure that
the boss of the press lever fits in the control cam, and that
the shaft (b) of the pinch roller arm assembly connects with
the hole of the press lever.

(10) Attach slit washer (a) to shaft (a).

Wire (black)Wire (red)

Section (a)

Capstan brake assembly

Note:

• When replacing the worm bearing of the loading motor as-

sembly, attach it according to the following specification.
If worm bearing is not attached correctly, a mechanism
noise may occur. (See Fig. 2-2-6c)

LOADING MOTOR

WORM BEARING

6.8 ± 0.2 mm

Fig. 2-2-6c

2.2.7 Capstan motor, load gear, control plate

2.2.7.1 Removal

(1) Detach the belt.
(2) Check that the FFC connector on the drum is disconnected.
(3) Release the catch (a) to remove the FFC wire.
(4) Remove the screws (a) to detach the capstan motor.
(5) Remove the screws (b) to detach the fixing plate.
(6) Release the catch (b) to detach the load gear.
(7) Turn the load gear (S/T) in the loading direction to detach it.
(8) Remove the control plate.

Screws (a)

Position
guide (b)

DRIVE
LEVER

Guide hole (b)

Arrow (a)

Screw (a)

CONTROL CAM

Shaft (a)

Guide hole (a)

Guide hole (c)

Loading motor assembly

Shaft (a)

Shaft (b)

CONTROL
PLATE

CONTROL
PLATE

Catch (b)

Load gear (T) assembly

Load gear (S) assembly

LOAD GEAR

FIXING PLATE

Capstan motor assembly

Screws (b)

BELT

2-8

PRESS LEVER

Fig. 2-2-6b

Slit washer (a)

LOAD GEAR

Catch (a)

Fig. 2-2-7a

FFC

2.2.7.2 Installation (phase adjustment)

(1) Place the main deck on the guide hole (a) of the tension arm

lever.

(2) Place the main deck on the guide hole (b) of the brake le-

ver.
(3) Attach the control plate to align with the position guide (a).
(4) Place the hole (c) of the load arm (T) on the pole base (T)

and the load gear (T) on the load gear base.
(5) Place the hole (d) of the load arm (S) on the pole base (S)

and the load gear (S) on the load gear base. Be sure to align

the guide mark (e) of the load gear (T) to that of the load

gear (S).
(6) Turn the load gear (S/T) in the unloading direction to place

the main deck on the guide hole (f) of the load gear (T).
(7) Place the main deck on the guide hole (g) of the control plate.
(8) Attach the load gear on the load gear base so that the con-

trol plate is placed on the edge (h) of the load gear.
(9) Place the fixing plate on the shaft of the load gear base and

secure the screws (b).

2.2.8 Clutch unit assembly, direct gear

2.2.8.1 Removal

(1) Remove the slit washer (a) to detach the clutch unit assem-

bly.

(2) Remove the spring (a) and the direct gear.

DIRECT GEAR

POLE
BASE(T)

Hole (c)

Load gear (T) assembly

Insertion direction

CONTROL PLATE

Guide hole (g)

Guide marks (e)

Load gear (T)
assembly

(From the top)

LOAD GEAR BASE

Edge (h)

Position guide (a)

Guide hole (f)

POLE
BASE(S)

Hole (d)

Load gear (S) assembly

Load gear (S)
assembly

Screws (b)

FIXING
PLATE

LOAD GEAR

Spring (a)

CLUTCH UNIT

Slit washer (a)

Fig. 2-2-8a

Guide hole (b)

BRAKE LEVER

Fig. 2-2-7b

Guide hole (a)

TENSION ARM LEVER

2-9