JVC SR-VC30U Service manual

SERVICE MANUAL

Mini DV/S-VHS VIDEO CASSETTE RECORDER

SR-VS30U

A.MONITOR

VCR TVCABLE/DBS

POWER

PROG

TV/VCRA/B DISPLAY

CHECK

ENTER/OSD

T W

123

456

DBS

DAILY(M-F)

WEEKLY

C. RESET

AUX

CANCEL

TIMER

START STOP DATE CH

EXPRESS PROGRAMMING

SP/LP

PROG

DV S-VHS

SP/EP

PLAY

REW

STOP

REC

TV CH +

VOL

POWER

TV CH

JOG/

SHUTTLE

EJECT

PULL-OPEN

PAUSEPLAYSTOP

DUB

S-VHS REC

REW FF

CH – / +

PUSH / TURN

S-VHS

24HR QUICK

PROGRAM

EJECT

PULL-OPEN

SPECIFICATIONS

GENERAL

Power requirement : AC 120 Vd, 60 Hz Power consumption

Power on : 35 W Power off : 4.4 W

Temperature

Operating : 5°C to 40°C (41°F to 104°F) Storage : –20°C to 60°C (–4°F to140°F)

Operating position : Horizontal only Dimensions (WxHxD)

Weight : 5.1 kg

Input/Output : RCA connectors:

VHS DECK VIDEO/AUDIO

Signal system : NTSC-type color signal and EIA

Recording system : DA4 (Double Azimuth) head helical

Format : S-VHS/VHS NTSC standard Signal-to-noise ratio: 45 dB Horizontal resolution

Frequency range : 70 Hz to 10,000 Hz (Normal audio)

Maximum recording time

(SP) : 210 min. with ST-210 video cassette (EP) : 630 min. with ST-210 video cassette

DV DECK VIDEO/AUDIO

Signal system : NTSC-type colour signal, 525 lines

Recording system : Digital Component Recording Format : DV format (SD mode) Cassette : Mini DV Cassette Maximum recording time

(SP) : 80 min. with M-DV80ME cassette (LP) : 120 min. with M-DV80ME cassette

Audio recording system

: 435 mm x 106 mm x 380 mm

(17-

(11.2 lbs)

IN x 2, OUT x 2 S-Video connectors: IN x 2, OUT x 2 DV connector: IN/OUT x 1 (4-pin, IEEE1394 conformity, digital input/output)

monochrome signal, 525 lines/ 60 fields

scan system

: 230 lines (VHS)

400 lines (S-VHS)

20 Hz to 20,000 Hz (Hi-Fi audio)

60 fields

: PCM 48 kHz, 16 bit (2 ch)/

32 kHz, 12 bit (4 ch)

” x 4-3/16” x 15”)

TUNER

Tuning system : Frequency synthesized tuner Channel coverage

VHF : Channels 2–13 UHF : Channels 14–69 CATV : 113 Channels

TIMER

Clock reference : Quartz Program capacity : 1-year programmable timer/

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 equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

Reorient or relocate the receiving antenna. Increase the separation between the equipment and receiver. Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. Consult the dealer or an experienced radio/TV technician for help.

6 programs each on the VHS and DV dec k

: Approx. 10 min.

: RF cable (F-type),

BNC/RCA adapter x 2,

Audio/Video cable,

S-Video cable (4-pin), Controller, Infrared remote control unit, “AA” battery x 2

SR-VS30U V14SD1

This service manual is printed on 100% recycled paper.

No.82909

March 2002

Section Title Page Section Title Page

Important Safety Precautions INSTRUCTIONS

1. DISASSEMBLY

1.1 HOW TO REMOVE THE MAJOR PARTS ........................................1-1

1.1.1 Introduction ..................................................................................1-1

1.2 HOW TO READ THE DISASSEMBLY AND ASSEMBLY..................1-1

1.3 DISCONNECTION OF CONNECTORS (WIRES) ............................ 1-1

1.4 HOW TO REMOVE THE MAJOR PARTS <COM section> ..............1-2

1.4.1 Disassembly flow chart ................................................................1-2

1.4.2 Disassembly/assembly method <COM section> ......................... 1-2

1.5 HOW TO REMOVE THE MAJOR PARTS <VHS section> ............... 1-4

1.5.1 Disassembly flow chart ................................................................1-4

1.5.2 DIsassembly/assembly method <VHS section> ..........................1-4

1.6 HOW TO REMOVE THE MAJOR PARTS <DV section>..................1-6

1.6.1 Disassembly flow chart ................................................................1-6

1.6.2 Disassembly/assembly method <DV section>.............................1-6

1.7 CONNECTION ..................................................................................1-8

1.8 SERVICE POSITIONS....................................................................1-10

1.8.1 Requirement PATCH CORDS....................................................1-10

1.8.2 Service position <VHS SIDE>....................................................1-10

1.8.3 Service position <DV FOIL SIDE> .............................................1-10

1.8.4 Service position <DV COMPONENT SIDE>.............................. 1-11

1.9 Jig RCU mode.................................................................................1-11

1.9.1 Setting the Jig RCU mode ......................................................... 1-11

1.9.2 Setting the User RCU mode ...................................................... 1-11

1.10 MECHANISM SERVICE MODE ................................................... 1-12

1.10.1 How to set the “MECHANISM SERVICE MODE” .................... 1-12

1.11 EMERGENCY DISPLAY FUNCTION............................................1-13

1.11.1 Displaying the emergency information.....................................1-13

1.11.2 Clearing the emergency history ...............................................1-13

1.11.3 Emergency content description................................................1-14

1.11.4 Emergency detail information <1> ...........................................1-15

1.11.5 Emergency detail information <2> ...........................................1-16

2. MECHANISM ADJUSTMENT (VHS)

2.1 BEFORE STARTING REPAIR AND ADJUSTMENT .........................2-1

2.1.1 Precautions ..................................................................................2-1

2.1.2 Checking for Proper Mechanical Operations ...............................2-1

2.1.3 Manually Removing the Cassette Tape .......................................2-1

2.1.4 Jigs and Tools Required for Adjustment.......................................2-2

2.1.5 Maintenance and Inspection ........................................................ 2-3

2.2 REPLACEMENT OF MAJOR PARTS ............................................... 2-6

2.2.1 Before Starting Disassembling

(Phase matching between mechanical parts)...............................2-6

2.2.2 How to Set the Mechanism Assembling Mode............................. 2-6

2.2.3 Cassette Holder Assembly...........................................................2-6

2.2.4 Pinch Roller Arm Assembly .......................................................... 2-8

2.2.5 Guide Arm Assembly and Press Lever Assembly ........................ 2-8

2.2.6 Audio Control Head......................................................................2-8

2.2.7 Loading Motor .............................................................................. 2-8

2.2.8 Capstan Motor ............................................................................. 2-9

2.2.9 Pole Base Assembly (supply or take-up side).............................. 2-9

2.2.10 Rotary Encoder ........................................................................ 2-10

2.2.11 Clutch Unit................................................................................2-10

2.2.12 Change Lever Assembly, Direct Gear, Clutch Gear

and Coupling Gear....................................................................2-10

2.2.13 Link Lever ................................................................................ 2-11

2.2.14 Cassette Gear, Control Cam and Worm Gear ......................... 2-11

2.2.15 Control Plate ............................................................................ 2-11

2.2.16 Loading Arm Gear (supply or take-up side)

and Loading Arm Gear Shaft .................................................... 2-12

Take-up Lever, Take-up Head and Control Plate Guide ..................

2.2.17

2.2.18 Capstan Brake Assembly.........................................................2-13

2.2.19 Sub Brake Assembly (take-up side).........................................2-13

2.2.20 Main Brake Assembly (take-up side), Reel Disk (take-up side)

and Main Brake Assembly (supply side)...................................2-13

2.2.21 Tension Brake Assembly, Reel Disk (supply side)

and Tension Arm Assembly .......................................................2-14

2.2.22 Idler Lever, Idler Arm Assembly ...............................................2-14

2.2.23 Stator Assembly .......................................................................2-14

2.2.24 Rotor Assembly........................................................................2-14

2.2.25 Upper Drum Assembly .............................................................2-15

2.3 COMPATIBILITY ADJUSTMENT .................................................. 2-16

2.3.1 Checking/Adjustment of FM Waveform Linearity.......................2-16

Checking/Adjustment of the Height and Tilt of the Audio Control Head ....................

2.3.2

Checking/Adjustment of the Audio Control Head Phase (X-Value) ...............

2.3.3

2.3.4 Checking/Adjustment of the Standard Tracking Preset .............2-18

2.3.5 Checking/Adjustment of the Tension Pole Position....................2-18

MECHANISM ADJUSTMENT (DV)

2.4 PREPARATION...............................................................................2-20

2.4.1 Precautions ................................................................................2-20

2.4.2 Tools Required for Adjustments .................................................2-20

2.4.3 Disassembly and Assembly Procedures....................................2-20

2.4.4 Screws and Washers Used in Disassembly/

Assembly of the Mechanism Assembly......................................2-20

DISASSEMBLY/ASSEMBLY OF THE MECHANISM ASSEMBLY...................

2.5

2.5.1 Introduction ................................................................................2-21

2.5.2 Mechanism Modes .....................................................................2-21

2.6 MECHANISM TIMING CHART ....................................................... 2-23

2.7

MECHANISM ASSEMBLY/DISASSEMBLY PROCEDURE TABLE ..................

2.8 DISASSEMBLY/ASSEMBLY...........................................................2-26

2.9 LIST OF PROCEDURES FOR DISASSEMBLY .............................2-34

2.10 MECHANISM PHASE CHECK/ADJUSTMENT ............................ 2-35

2.11 MECHANISM DISASSEMBLY/ASSEMBLY SHEET .....................2-36

2.12 POSITIONING THE TENSION POLE...........................................2-38

COMPATIBILITY AND ERROR RATE ADJUSTMENTS .................

2.13

2.13.1 Preparation .............................................................................. 2-39

2.13.2 Adjustment ...............................................................................2-39

2.13.3 Linearity adjustment .................................................................2-40

2.13.4 PB switching point adjustment ................................................. 2-40

2.13.5 Error rate adjustment ...............................................................2-40

2.13.6 Error rate measuring method ................................................... 2-40

2.14 TAPE EJECTION .......................................................................... 2-41

2-13

2-17 2-17

2-21

2-24

2-39

3. ELECTRICAL ADJUSTMENT (VHS)

3.1 PRECAUTION .................................................................................. 3-1

3.1.1 Required test equipments ............................................................ 3-1

3.1.2 Required adjustment tools ...........................................................3-1

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

3.1.4 Switch settings and standard precautions ................................... 3-1

3.1.5 EVR Adjustment...........................................................................3-1

3.2 SERVO CIRCUIT..............................................................................3-2

3.2.1 Switching point .............................................................................3-2

3.2.2 Slow tracking preset.....................................................................3-2

3.3 VIDEO CIRCUIT ...............................................................................3-2

3.3.1 D/A level .......................................................................................3-2

3.3.2 EE Y/PB Y (S-VHS/VHS) level.....................................................3-2

3.3.3 REC color (colour) level ............................................................... 3-3

3.3.5 Video EQ (Frequency response) ................................................. 3-3

3.3.6 AUTO PICTURE initial setting......................................................3-4

3.3.6 DV EE Y level...............................................................................3-4

3.4 AUDIO CIRCUIT ............................................................................... 3-4

3.4.1 Audio REC FM ............................................................................. 3-4

3.5 DEMODULATOR CIRCUIT ............................................................... 3-5

3.5.1 Input level.....................................................................................3-5

3.5.2 Stereo VCO..................................................................................3-5

3.5.3 Stereo filter...................................................................................3-5

3.5.4 Separation-1 ................................................................................ 3-5

3.5.5 Separation-2 ................................................................................ 3-6

3.5.6 SAP VCO .....................................................................................3-6

ELECTRICAL ADJUSTMENT (DV)

3.6 PREPARATION.................................................................................3-7

3.6.1 Precautions .................................................................................. 3-7

3.6.2 Equipment required for adjustment..............................................3-7

3.6.3 Tools required for adjustments .....................................................3-7

3.6.4 Setup............................................................................................3-7

4. CHARTS AND DIAGRAMS

NOTES OF SCHEMATIC DIAGRAM..................................................... 4-1

CIRCUIT BOARD NOTES ......................................................................4-2

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

SWITCHING REGULATOR SCHEMATIC DIAGRAM[HR-DVS3U/SR-VS30U] ..

4.2

4.3 MAIN (VIDEO/AUDIO) SCHEMATIC DIAGRAM .............................. 4-7

4.4 MAIN (VHS SYSCON) SCHEMATIC DIAGRAM .............................. 4-9

4.5 MAIN (TUNER) SCHEMATIC DIAGRAM ....................................... 4-11

4.6 MAIN (VIDEO I/O & SUB EMPHA) SCHEMATIC DIAGRAM ......... 4-13

4.7 MAIN (AUDIO I/O) SCHEMATIC DIAGRAM...................................4-15

4.8 MAIN (CONNECTION) SCHEMATIC DIAGRAM............................4-17

4.9 3D DIGITAL/2M SCHEMATIC DIAGRAM ....................................... 4-19

4.10 TERMINAL (S-SUB) SCHEMATIC DIAGRAM .............................. 4-21

4.11 TERMINAL (I/O) SCHEMATIC DIAGRAM ....................................4-23

DEMODULATOR SCHEMATIC DIAGRAM[HR-DVS3U/SR-VS30U]..

4.12

4.13

POWER SW, SW/DISPLAY AND JOG SCHEMATIC DIAGRAMS ....

4.14 DV MSD SCHEMATIC DIAGRAM ................................................ 4-29

4.15 DV MAIN SCHEMATIC DIAGRAM ............................................... 4-31

4.16 DV I/O SCHEMATIC DIAGRAM ...................................................4-33

4.17 DV V OUT SCHEMATIC DIAGRAM .............................................4-35

4.18 DV PRE/REC SCHEMATIC DIAGRAM ........................................ 4-37

4.19 DV REG SCHEMATIC DIAGRAM ................................................4-38

4.20 DV AUDIO AD/DA SCHEMATIC DIAGRAM .................................4-39

4.21 MAIN(ON SCREEN) SCHEMATIC DIAGRAM .............................4-40

4.22 SWITCHING REGULATOR CIRCUIT BOARD .............................4-41

4.23 MAIN CIRCUIT BOARD................................................................4-43

4.24 3D DIGITAL/2M CIRCUIT BOARD ...............................................4-46

DEMODULATOR, POWER SW, SW/DISPLAY AND JOG CIRCUIT BOARDS ....

4.25

4.26 TERMINAL CIRCUIT BOARD.......................................................4-49

4.27 DV MAIN CIRCUIT BOARD..........................................................4-51

4.28 REMOTE CONTROL SCHEMATIC DIAGRAM ............................4-53

4.29 WAVEFORMS ............................................................................... 4-54

4.30 VOLTAGE CHARTS......................................................................4-55

4.31 FDP GRID ASSIGNMENT AND ANODE CONNECTION ............. 4-57

4.32 CPU PIN FUNCTION ....................................................................4-58

4.33 SYSTEM CONTROL BLOCK DIAGRAM (VHS) ........................... 4-59

4.34 VIDEO BLOCK DIAGRAM(VHS) .................................................. 4-61

4.35 AUDIO BLOCK DIAGRAM (VHS) .................................................4-65

4.36 SYSTEM CONTROL BLOCK DIAGRAM (DV) .............................4-67

4.37 VIDEO BLOCK DIAGRAM (DV) ................................................... 4-69

5. PARTS LIST

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

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

5.3 MECHANISM ASSEMBLY (VHS) <M3> ...........................................5-4

5.4 MECHANISM ASSEMBLY (DV) <M4>..............................................5-6

5.5 ELECTRICAL PARTS LIST...............................................................5-8

SW REGULATOR BOARD ASSEMBLY <01> ........................................ 5-8

MAIN BOARD ASSEMBLY <03> ............................................................5-9

3D DIGITAL/2M BOARD ASSEMBLY <05>..........................................5-17

TERMINAL BOARD ASSEMBLY <06> ................................................. 5-18

A/C HEAD BOARD ASSEMBLY <12> ..................................................5-19

DEMOD BOARD ASSEMBLY <14>......................................................5-19

POWER BOARD ASSEMBLY <27>......................................................5-19

SW/DISPLAY BOARD ASSEMBLY <28> .............................................5-19

DV MAIN BOARD ASSEMBLY <50> ....................................................5-20

LOADING MOTOR BOARD ASSEMBLY <55>.....................................5-25

JOG BOARD ASSEMBLY <85>............................................................5-25

4-5

4-25 4-27

4-47

Important Safety Precautions

cut close to connector

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.

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 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.

symbol and shaded ( ) parts are

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).

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.

Metal sleeve

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

S40888-01

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

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

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

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

≤

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

CONNECTOR

FPC

CONNECTOR

FPC

Fig. 1-3-1 Fig. 1-3-2

Fig. 1-3-3 Fig. 1-3-4

CONNECTOR

FPC

Fig. 1-3-5

CONNECTOR

FPC

CONNECTOR

FPC

DISASSEMBLY

1.1 HOW TO REMOVE THE MAJOR PARTS

1.1.1 Introduction

This set is a double-deck video recorder integrating a Mini DV deck and a VHS deck. Its internal structure is divided into three sections that include the power supply, VHS and DV sections. Therefore, the removal of major parts will also be described under three separate sections as listed below.

1. COMMON section

2. VHS section

3. DV section

< TOP VIEW >

1. COMMON section

2. VHS section

1.3 DISCONNECTION OF CONNECTORS (WIRES)

3. DV section

Fig. 1-1-1

1.2 HOW TO READ THE DISASSEMBLY AND ASSEMBLY

Step/

Loc No.

Top cover, Bracket COM1 Front panel

assembly

Fig. No.

COM2 8(L3),

§§ §§ §

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

(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 as-

signed nos. in priority order and do not correspond to those on the spare parts list.

(5) Adjustment information for installation

Point NotePart name

4(S1), 3(S2), 2(L1), (L2) 2(S3)

CN7507(WR1), CN3011(WR2)

—

1-1

1.4

HOW TO REMOVE THE MAJOR PARTS <COM section>

1.4.1 Disassembly flow chart

This flowchart shows the disassembly procedure for the exterior parts and electrical parts. Basically, reverse this procedure when assembling them.

[1] Top cover, Bracket

[2] Front panel assembly

(S1a)

[1] Top cover

(S1b)

SW/Display board assembly, Power SW board assembly,

[3]

Jog board assembly

[4] SW REG board assembly

Foot assembly, Foot(center), Foot(rear), Bottom cover

[5]

Disassembly/assembly method <COM section>

1.4.2

Step/

Loc No.

Top cover

[1]

Bracket Front panel

[2]

assembly

SW/Display board assembly

[3]

Power SW board assembly Jog board assembly SW REG board

[4]

assembly

[5]

Foot assembly Foot(center) Foot(rear)

Bottom cover

Fig. No.

4(S1a), 2(S1b)

COM1

2(S1c)

COM2 8(L2a),

CN7510(WR2a), CN3011(WR2b)

COM3 8(S3a)

2(S3b) 2(S3c),Knob(Jog)

COM4 4(S4a),

CN5322(WR4a), CN5321(WR4b), CN5325(WR4c), CN5324(WR4d), CN5323(WR4e)

COM5Lug wire

(S5a) 5(L5a)

4(L5b), 9(L5c), 2(L5d)

Point NotePart name

—

—

• When attaching the FPC, be sure to connect it in the correct orientation.

• When attaching the FPC take care that it is not caught.

• When removing or attaching the WIRE/FPC, refer to "1.7 CONNECTION"(page 1-8) at same time.

When attaching the Front panel assembly, make sure that the door openers of both decks (DV, VHS) are in the down position.

When attaching the Front panel assembly, be careful not to damage the DV terminals.

When attaching (WR2a) and (WR2b), insert supporting long side to connector in the Main board assembly.

When attaching Jog board assembly, attach it before SW/ Display board assembly.

When removing Bottom cover, remove it after VHS section parts and DV section parts.

<Note 2b> DV SIDE

(L2a)

DV terminals <Note 2c>

(L2a)

(S1c)

[1] Bracket

Fig. COM1

CN3011

(L2a)

(WR2b)

[2] Front panel assembly

Fig. COM2

CN7510

VHS SIDE

(WR2a) <Note 2a, 2d>

(L2a)

(S1a)

1-2

[2] Front panel assembly

Knob (Jog)

[5] Lug wire

(S5a)

(L5a)

(L5d)

(L5a)

(S3a)

(S3c)

(S3a)

(S3c)

(S3a)

[4] SW.REG board assy

(S3a)

[3]

(S3a)

(S4a)

Jog board assembly <Note 3a>

SW/Display board assembly

(S3b)

Fig. COM3

Power SW board assembly

(L5a)

(L5b)

[5] Foot assy

(L5c)

[5] Foot(center)

[5] Foot(rear)

(L5a)

(L5b)

[5] Foot assy

Fig. COM5

(L5c)

(L5b)

[5] Bottom cover

(L5c)

[5] Foot(rear)

CN5324

(WR4d)

(WR4e)

(S4a)

CN5323

(S4a)

Fig. COM4

(S4a)

CN5325

CN5322

CN5321

(WR4c) <Note 2a>

(WR4a) <Note 2a>

(WR4b) <Note 2a>

1-3

1.5

HOW TO REMOVE THE MAJOR PARTS <VHS section>

1.5.1 Disassembly flow chart

This flowchart shows the disassembly procedure for the exterior parts and electrical parts. Basically, reverse this procedure when assembling them. However, it is required to remove the common section parts as far as [1] “Top cover Bracket” and [2] “Front panel assembly” in advance. (See section 1.4.)

[1] Drum assembly

[2] Mechanism assembly

[3] Main board assembly

1.5.2 DIsassembly/assembly method <VHS section>

Procedures for Lowering the Cassette holder assembly

As the mechanism of this unit is integrated with the Housing assembly, the holder must be lowered and the two screws unscrewed when removing the Mechanism assembly.

Fig. 2

Fig. 1

Step/

Loc No.

[1]

Drum assembly

(Inertia plate) (Roller arm assy)

(Cleaner assy) Mechanism

[2]

assembly

Main board

[3] <Note 1b>

assembly

Fig. No.

V3 (S8a), 6(L8a),

Point NotePart name

CN1(WR6a), CON1(WR6b), (S6a), (S6b), (S6c)

4(L6a) (P6a), (L6b)

(L6c) (S7a), (S7b), (S7c),

(S7d), 2(L7a), CN1(WR7a)

CN701(WR8a), CN2601(WR8b), CN3014(WR8c)

When attaching or removing the FPC, take care not to disconnect any of the wires.

• When attaching the FPC, be sure to connect it in the correct orientation.

• When removing or attaching the WIRE/FPC, refer to "1.7 CONNECTION"(page 1-8) at same time.

When it is required to remove the screws ((S7a), (S7b), (S7c) and (S7d)) retaining the Mechanism assembly , please refer to the “Procedures for Lowering the Cassette holder assembly”(See on page 1-4).

• When reattaching the Mechanism assembly to the Main board assembly, take care not to damage the sensors on the Main board assembly (D3001: LED, Q3002: Start sensor, Q3003: End sensor, S3002: S cassette switch).

• When reattaching the Mechanism assembly to the Main board assembly, CN2 of LOADING MOTOR BOARD should not be floated.

Fig. 3

Turn the loading motor pulley in the direction as indicated by Fig.2. As both A and B levers are lodged twice, push the levers in the direction as indicated by Fig.3 to release them. When pushing the levers, do it in the order of A , B , B , A . When the holder has been lowered, turn the pulley until the cassette holder is securely in place without allowing any up/ down movement.

Procedures for Lowering the Cassette holder assembly

Note: When installing the Drum assembly, secure the screws

(S6a to S6c) in the order of a, b, c.

Inertia plate

(S6c)

Roller arm assy

(S6a)

(L6a)

(P6a)

(L6b)

[1] Drum assembly

CON1

CN1

(WR6b)

(S6b)

(WR6a)

Cleaner assy

(L6c)

• When removing the Mechanism assembly only, unhook the two spacers connecting it with the Main board assembly with pliers from the back side of the Main board assembly first, and then remove the Mechanism assembly.

1-4

Fig. V1

Note:

(S8a)

(L8a)

CN2601

CN701

CN3014

[3] Main board

assembly

(WR8a)

(WR8b)

(WR8c)

Make a crease on the position where the dotted line is not exceeded.

A/C head base

(WR7a)

Note: When installing the Mechanism assembly, secure the screws (S7a to S7b) in the order of a, b.

[2] Mechanism assembly

(S7b)

(L7a)

spacer

(S7d)

Q3003

End sensor

D3001

(WR7a) <Note 1b>

CN2

(S7a)

CN1

Q3002

S3002

S3002 S cassette switch <Note 2b>

CN2 <Note 2b>

(S7c)

D3001 LED <Note 2b>

Q3002 Start sensor <Note 2b>

(L7a)

spacer

Fig. V3

Fig. V2

1-5

1.6

HOW TO REMOVE THE MAJOR PARTS <DV section>

1.6.1 Disassembly flow chart

This flowchart shows the disassembly procedure for the exterior parts and electrical parts. Basically, reverse this procedure when assembling them. However, it is required to remove the common section parts as far as [1] “Top cover, Bracket” and [2] “Front panel assembly” in advance. (See section 1.5.)

(S9b)

(S9a)

[1] Base(DV)

[2] DV Mechanisam assembly, DV Main board assembly

[3] DV MDA board assembly

1.6.2 Disassembly/assembly method <DV section>

Step/

Loc No.

[1] [2]

[3]

Base(DV) DV Mechanism

assembly

DV Main board assembly

DV MDA board assembly

Fig. No.

D1 3(S9a), (S9b) D2 3(S10a),

D3 2(S11a), 2(S11b),

Point NotePart name

CN1502(WR10a), CN4001(WR10b) CN1501(WR10c)

4(S10b)

2(L11a), CN5503(WR11a), CN5504(WR11b), CN5502(WR11c), CN5505(WR11d), CN5507(WR11e), Bracket(MDA)

<Note 1a> <Note 2a,

2b, 2c>

With due regard to operational considerations, remove the parts located on the Base(DV) (i.e. DV Mechanism assembly, DV MDA board assembly etc.) together before removing the major parts.

Take care not to scratch or damage the drum assembly by the cleaner assembly when performing work.

Take care not to damage the board assembly when detaching parts.

• When attaching the FPC, be sure to connect it in the correct orientation.

• When removing or attaching the WIRE/FPC, refer to "1.7 CONNECTION"(page 1-8) at same time.

Lug wire

(S9b) Lug wire

Base(DV) Bottom chassis

When reattaching (S9b), attach in the order of the above figure.

Fig. D1

[2] Mechanism assembly(DV) <Note 2a>

[1] Base(DV)

[2] DV Main board assembly <Note 2b>

(S10a)

(S10b)

CN1502

(S10a)

(WR10a) <Note 2c>

CN4001

(WR10c) <Note 2c>

(WR10b) <Note 2c>

CN4001

CN1501

1-6

(S10b)

CN1502

Fig. D2

(S10b)

[3] DV MDA board assembly

(S11a)

CN5504

Bracket(DV)

(WR11b) <Note 2c>

(S11b)

(S11a)

(S11b)

NOTE: When removing, remove in order of a number to .

CN5505

CN5503

4 (WR11a) <Note 2c>

CN5507

(L11a)

(WR11d) <Note 2c>

CN5502

(WR11c) <Note 2c>

(WR11e) <Note 2c>

Fig. D3

1-7

1.7 CONNECTION

Treat the wire so as not to come to fan.

right side

CN5323

CN1001

right side

bend

right side

CN5501

DV DRUM

FAN

bend

CN3701

bend

CN5506

back side

CN1501

right side

TERMINAL PWB

Hold wire by stylepin.

ST2

right side

CN502CN901

right side

make a crease

CN1

right side

CN3001

right side

A/C HEAD

bend

back side

DRUM

Should be confirmed that wire not touch to IC of STATOR PWB ASS'Y.

NOTE) Wire the wires as

shown in a figure.

CN1502

CN5502

NOTE) Wire the wires as shown in a figure. NOTE) Put the surplus

wire into this space.

"D"

CN5505

CN5503

CN5507

back side

To SW/Display board

CN7001

NOTE) Twist a wire one time.

To SW/Display board

CN7191

back side

1-8

NOTE) Wire the wires as shown in a figure.

Fig. 1-7-1

DETAIL"A"

Absorb the looseness of the wire in the B part.

CN1

MAIN PWB

WIRING for MECHA ADJ

DRUM

DETAIL"B"

DV MAIN PWB

FINAL WIRING

DV MECHA

CN1502

electrode side

Push into the BOTTOM CHASSIS and treat the wire according to the following figure.

BOTTOM CHASSIS

DETAIL"C"

FRONT PANEL

Absorb the looseness of the wire according to the following figure.

BOTTOM CHASSIS

CN7510

MAIN PWB

CN3011

DETAIL "D"

DV MDA BOARD ASSEMBLY

CN5504

BRACKET(DV)

AC/ HEAD

right side

(WR7a)

AC/ HEAD

right side

After MECHA adjustment, Treat the wire (WR7a) according to the following figure.

Make a crease on the position where the dotted line is not exceeded.

Fig. 1-7-2

Fig No.

Symbol

Connected point

Connection

Connected point

Pin No.

Type

(FPC/

WIRE)

1 WR2a MAIN CN7510 SW/DISPLAY CN7191 10 FPC 2 WR2b MAIN CN3011 SW/DISPLAY CN7001 20 FPC 3 WR4a MAIN CN7508 SW/REG CN5322 10 FPC 4 WR4b MAIN CN7509 SW/REG CN5321 12 FPC 5 WR4c SW/REG CN5325 FAN MOTOR - 2 WIRE 6 WR4d SW/REG CN5324 DV MDA CN5501 5 WIRE 7 WR4e SW/REG CN5323 DV MAIN CN1001 8 FPC 8 WR6a MAIN CN1 UPPER DRUM - 13 FPC

9 WR6b DRUM MOTOR CON1 MAIN CN3001 5 FPC 10 WR7a A/C HEAD CN1 MAIN CN2001 7 FPC 11 WR8a MAIN CN701 DV MAIN CN3501 14 FPC 12 WR8b MAIN CN2601 DV MAIN CN3701 8 FPC 13 WR8c MAIN CN3014 DV MAIN CN1503 4 FPC 14 WR10c DV MAIN CN1501 DV MDA CN5506 20 FPC 15 - MAIN CN7506 TERMINAL CN502 15 FPC 16 - MAIN CN7507 TERMINAL CN901 5 FPC 17 WR10a SENSOR(DV) - DV MAIN CN1502 15 FPC 18 WR10b PRE/REC(DRUM)(DV) - DV MAIN CN4001 8 FPC 19 WR11a DRUM MOTOR(DV) - DV MDA CN5503 11 FPC 20 WR11e HOUSING MOTOR(DV) - DV MDA CN5507 4 WIRE 21 WR11d ROTARY ENCODER(DV) - DV MDA CN5505 4 WIRE 22 WR11c LOADING MOTOR(DV) - DV MDA CN5502 2 WIRE 23 WR11b CAPSTAN MOTOR(DV) - DV MDA CN5504 18 FPC

Table 1-7-1

1-9

1.8 SERVICE POSITIONS

The servicing locations for use in troubleshooting or servicing of the set are provided separately for the VHS and DV.

I SERVICE POSITIONS <VHS SIDE>

II SERVICE POSITIONS <DV FOIL SIDE>

III SERVICE POSITIONS <DV COMPONENT SIDE>

1.8.1 Requirement PATCH CORDS

The following PATCH CORDS is required.

Board to Board Wire Used

1 PTU94022-10 QUQ212-1040CG I 2 PTU94022-20 QUQ112-2040CG I 3 YTU94074-15 QUQ105-1540AA III

Table 1-8-1

1.8.2 Service position <VHS SIDE> <Removal>

(1) Remove the top cover and bracket. (2) Remove the front panel assembly. (3) Remove the Main board assembly together with the

Mechanism assembly.

< Installation >

(1) Stand up the Bottom chassis assembly so that the DV/

Regulator side is in the lower position.

Note: • Take care to the fall of the Fan.

(2) Connect FPCs and wires accordingly in Fig. 1-8-1.

Point: • Take care that the FPCs and wires are not

subjected to stress in this positioning.

(3) Connect the PATCH CORDS to the two FPCs of the Front

panel assembly, then connect the CORDS to the CN7510/CN3011.

For the PATCH CORD is required, see Table 1-8-1.

1.8.3 Service position <DV FOIL SIDE> <Removal>

(1) Remove the top cover and bracket. (2) Remove the front panel assembly. (3) Remove the Base(DV) together with DV Mechanism as-

sembly and DV Main board assembly.

Note:

• Take care not to damage the parts during operating. < Installation >

(1) Place an insulation sheet on the SW/Reg board assem-

bly.

(2) Place a DV section(Base(DV) with DV Mechanism as-

sembly and DV Main board assembly) on the insulation sheet.(refer to Fig. 1-8-2)

Note:

• Confirm that FPCs and wires are not unconnected from the connectors.

DV Mechanism

Insulation Sheet

assembly

DV Main board assembly

CN1502

CN3501

Base(DV)

CN3701

CN1503

Front panel assembly

CN2601

CN701

CN7001

CN3014

CN3011

CN7510

CN7191

Fig. 1-8-2

CN2601

CN7509

Main board assembly

1-10

CN701

CN7508

CN5322

CN3011

CN3014

CN5321

CN7510

Fig. 1-8-1

CN1503 CN3701

CN3501

CN7191

CN7001

Front panel assembly

1.8.4 Service position <DV COMPONENT SIDE> <Removal>

(1) Remove the top cover and bracket. (2) Remove the front panel assembly. (3) Remove the Base(DV) together with DV Mechanism as-

sembly and DV Main board assembly.

(4) Remove the DV Mechanism assembly and DV Main

board assembly from Base(DV).

Note:

• Take care not to damage the parts during operating. < Installation >

(1) Place a DV Main board assembly on the Bottom chas-

sis.

(2) Place an insulation sheet on the rear side of DV Main

board assembly.

(3) Place a DV Mechanism assembly on the insulation sheet.

Note:

• Confirm that DV Mechanism assembly be getting on on the insulation sheet completely.

(4) Connect PATCH CORD to the connector(CN1502) and

connect FPC from DV Mechanism assembly.(refer to Fig. 1-8-3)

(5) Connect other FPCs and wires to the connector that cor-

responds each.(refer to "1-7 CONNECTION") For the PATCH CORD is required, see Table 1-8-1.

Note:

• Confirm that FPCs and wires are not unconnected from the connectors(especially CN4001).

1.9 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.

1.9.1 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.

1.9.2 Setting the User RCU mode

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

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

DV Mechanism assembly

Insulation Sheet

CN4001

DV Main board assembly

Front panel assembly

Fig. 1-8-3

CN7001

CN1502

CN3011

CN7510

CN7191

1-11

1.10 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”.

1.10.1 How to set the "MECHANISM SERVICE MODE"

(1) Disconnect VCR from AC. (2) Connect TPGND and TP7001 (TEST) on the Display

board assembly with a jump wire. (3) Connect VCR to AC. (4) Press the POWER button.

(5) With lock levers A B on the left and right of the Cassette

holder assembly pulled toward the front, slide the holder in the same direction as the cassette insertion direction. (For the positions of lock levers A B , refer to the “Procedures for Lowering the Cassette holder assembly” on page 1-4 of 1.5 HOW TO REMOVE THE MAJOR PARTS <VHS section>

(6) The cassette holder lowers and, when the loading has

completed, the mechanism enters the desired mode.

bend

right side

DV MAIN BOARD

ASSEMBLY

SW/REG BOARD

ASSEMBLY

CP5321

CN1001

right side

CN5501

DV DRUM

FAN

right side

CP5322

CN5323

CN3701

bend

back side

CP5325

bend

CN5506

CN2001 (JIG CONN.)

CN1501

TERMINAL BOARD ASSEMBLY

right side

TP701 D YV IN

ST2

right side

MAIN BOARD

ASSEMBLY

DRUM

back side

bend

3D DIGITAL/2M BOARD ASSEMBLY

VR701 D YV IN

CN1

CN502CN901

right side

CP3004

right side

VR1401 D/A LEVEL ADJ

right side

make a crease

CN3001

right side

A/C HEAD

DEMOD BOARD ASSEMBLY

right side

CP4001

CP3003

TP111 D.FF

TP4001 CTL. P

TP106 PB. FM

TP2253 A. PB.FM

1-12

DV MDA BOARD

ASSEMBLY

FW7002

DV MECHANISM

ASSEMBLY

POWER SW BOARD

ASSEMBLY

CN1502

FW7001

back side

SW/DISPLAY BOARD ASSEMBLY

Fig. 1-10-1

VHS MECHANISM ASSEMBLY

JOG BOARD

CN7001

CN7191

back side

ASSEMBLY

TPGND TP7001

TEST

1.11 Emergency display function

This unit has a function for storing the history of the past two emergencies (EMG) and displaying them on each FDP (or OSD). With the status of the VCR and mechanism at the moment an emergency occurred can also be confirmed.

FDP display model [FDP display]

0: 00 : 00

E:**:**

*1: *2 : 34 *5: *6 :*7

FDP (7segment LED) display model [FDP display]

0: 00

E: **

1: **

2: *1

3: *2

4: 34

5: *5

6: *6

7: *7

OSD display model [OSD display]

Normal display

EMG content display (E:Latest:Previous)

EMG detail information <1> EMG detail information <2>

Normal display

EMG content display (Latest)

EMG content display (Previous)

EMG detail information <1> [Deck operation mode] EMG detail information <1> [Mechanism operation mode] EMG detail information <1> [Mechanism sensor information and Mechanism mode position] EMG detail information <2> [Type of the cassette tape in use <1>] EMG detail information <2> [Winding position of the cassette tape in use] EMG detail information <2> [Type of the cassette tape in use <2> (Winding area)]

EMG E:**:** *1: *2 : 34

*5: *6 :*7

EMG content display (E:Latest:Previous)

EMG detail information <1> EMG detail information <2>

Notes:

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

• 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).

Jig RCU [Data transmitting method]

Depress the “ ” ( 3 ) button after the data code is set.

CUSTOM CODE 43: A CODE

DATA CODE

INITIAL MODE

Fig. 1-11a Jig RCU [PTU94023B]

1.11.1 Displaying the EMG information

(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 to re-

set the display.

Notes:

• For the OSD display model, all EMG information are showed by transmitting first code from the Jig RCU.

• For the EMG content, see “1.7.3 EMG content description”.

• For the EMG detail information <1> , see “1.7.4 EMG detail information <1> ”.

• For the EMG detail information <2> , see “1.7.5 EMG de-

tail information <2>”.

1.11.2 Clearing the EMG history

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

(EMG-02e)

1-13

1.11.3 EMG content description Note: EMG contents “E08/E09” are for the model with Dynamic Drum (DD).

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

EC1 or EU1: Head clog warning

When the mechanism mode cannot be changed to another mode even when the loading motor has rotated for more than 4 seconds in the loading direction, [E:01] is identified and the power is turned off.

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 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. However, the reel EMG is not detected in STILL/SLOW modes.

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.

When the eject operation does not complete in 3 seconds after the start, [E:05] is identified, the pinch rollers are turned off and stopped, and the power is turned off. When the cassette insertion operation does not complete in 3 seconds after the start, the cassette is ejected. In addition, when the operation does not complete within 3 seconds after the start, [E:05] is also identified and the power is turned 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 STILL/SLOW/FF/REW modes.

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 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). However, note that the reel EMG is not detected in the SLOW/STILL mode.

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:C1] or [E:U1] is identified and recorded in the emergency history. During the period in which a head clog is detected, the FDP and OSD repeat the “3-second warning display” and “7-second 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.

The mechanism is locked in the middle of mode transition.

1. 2

. The mechanism is locked at the loading end due to the encoder position

reading error during mode transition.

Power is not supplied to the loading MDA.

The mechanism is locked in the middle of mode transition.

The mechanism is locked at the unloading end due to the encoder position reading error during mode transition.

Power is not supplied to the loading MDA.

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; The idler gear is meshed with the take-up reel gear, but incapable of wind-

2) ing due to too large mechanical load (abnormal tension);

3) The take-up reel sensor does not output the FG pulse.

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.

2) The idler gear is meshed with the supply reel gear, but incapable of wind-

ing due to too large a mechanical load (abnormal tension);

3) The supply reel sensor does not output the FG pulse.

Power is not supplied to the reel sensors.

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

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.

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

Power is not supplied to the drum MDA.

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

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.

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

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

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.

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 (occurrence of tape entangling, etc.).

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.

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

Power is not supplied to the capstan MDA.

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

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. 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 to the sensor is not supplied. (Connection failure/soldering failure)

5. The FG pulse is not sent to the System Controller CPU. 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. The supply reel pulse is not generated in the FWD transport mode (PLAY/

1. FWD SEARCH/FF, etc.) because;

1) PLAY/FWD or SEARCH/FF is started while the tape in the inserted cas-

sette 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 FG pulse output from the supply reel sensor is absent.

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 supply 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 FG pulse output from the take-up reel sensor is absent.

The power to a reel sensor is not supplied.

1-14

Table 1-11-3a

1.11.4 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 mode position at the moment of EMG

Note:

• For EMG detailed information <1>, the content of the code that is shown on the FDP (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.

*1 : Deck operation mode [Common table of MN*, HD* and M3*]

Display

MN*/M3* 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 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)

Deck operation mode

*2 : Mechanism operation mode [Common table of MN* and M3*]

Display

MN* M3*

00 00 Command standby (Status without executing command) 02 02 POWER OFF by EMG occurrence 04 04 Moving to the adjacent position in the LOAD direction 06 06 Moving to the adjacent position in the UNLOAD direction 08 08 Cassette ejection being executed / Cassette housing ejection being

- 0A Mode transition to STOP with cassette ejection end 0A 0C Cassette insertion being executed 0C 0E Tape being loaded 0E 10 Tape being unloaded

10 12 Mode transition to STOP with pinch roller compression ON 12 14 Mode transition to STOP with pinch roller compression OFF 14 16

16 18

18 1A Mode transition to PLAY 1A 1C Mode transition to FWD SEARCH 1C 1E Mode transition to REC 1E 20 Mode transition to FWD STILL / SLOW

20 22 Mode transition to REV STILL / SLOW

22 24 Mode transition to REV SEARCH

24 26 Mode transition from FF / REW to STOP

26 28 Mode transition to FF

28 2A Mode transition to REW 2A 2C 4 sec. of REV as a result of END sensor going ON during loading 2C 2E 2E 30 Mechanism position being corrected due to overrun

80 80 Mechanism in initial position (Dummy command)

executed

Mode transition to STOP with pinch roller compression OFF as a result of POWER OFF Mode transition to STOP with pinch roller compression ON as a result of POWER ON

Short FF / REV as a result of END sensor going ON during unloading

Mechanism 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 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 de-

tection 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)

Mechanism operation mode

1-15

3– : Mechanism sensor information [Common table of MN*, HD* and M3*]

Display

MN* / HD* M3* REC safety Start End S-VHS SW CASS SW SW sensor sensor

0- VHS Cassette insertion Tab broken ON ON 1- VHS Cassette insertion Tab broken ON OFF 2- VHS Cassette insertion Tab broken OFF ON 3- VHS Cassette insertion Tab broken OFF OFF 4- VHS Cassette insertion Tab present ON ON 5- VHS Cassette insertion Tab present ON OFF 6- VHS Cassette insertion Tab present OFF ON 7- VHS Cassette insertion Tab present OFF OFF 8- S-VHS Cassette ejection Tab broken ON ON 9- S-VHS Cassette ejection Tab broken ON OFF A- S-VHS Cassette ejection Tab broken OFF ON

B- S-VHS Cassette ejection Tab broken OFF OFF C- S-VHS Cassette ejection Tab present ON ON D- S-VHS Cassette ejection Tab present ON OFF

E- S-VHS Cassette ejection Tab present OFF ON

F- S-VHS Cassette ejection Tab present OFF OFF

Mechanism sensor information

–4 : Mechanism mode position [Common table of MN*, HD* and M3*]

Display Mechanism mode position

MN* HD* M3*

-0 -7 - Initial value

-1 -0 - EJECT position

- - -0 EJECT position (Cassette housing drive mode)

-2 -7 - Housing operating

- - -1 Between EJECT and U / L STOP

-3 -1 -2 U / L STOP position

- - -3 Guide arm drive position

-4 -7 -4 Tape being loaded / unloaded (When the pole base is

-5 -2 -5 Tape being loaded / unloaded (When the pole base is

-6 -7 -6 Pole base compressed position

-7 -3 -F FF / REW position

-8 -7 -F Between FF / REW and STOP with pinch roller compres-

-9 -4 -F STOP with pinch roller compression OFF

-A -7 -E Between STOP with pinch roller compression OFF and

-B -5 - REV (REV STILL / SLOW) position

- - -D REV position

- - -C Between REV and REV STILL / SLOW

- - -B REV STILL / SLOW position

-C -7 - Between REV and FWD

- - -A Between REV STILL / SLOW and FWD STILL / SLOW

-D -6 - FWD (FWD STILL / SLOW) position

- - -9 FWD STILL / SLOW position

-E -7 - Between FWD and PLAY

- - -8 Between FWD STILL / SLOW and PLAY

-F -6 -7 PLAY position

located on the front side of the position just beside the drum)

located on the rear side of the position just beside the drum)

sion ON

REV

Note:

• In the case of the "HD*” microprocessor, as the display is always "-7” at any intermediate position between modes, the position of transitory EMG may sometimes not be located.

1.11.5 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.

*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

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.

*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 22 sections using a hex number from “00” to “15”.

“00” : End of winding “15” : Beginning of winding “FF or ––” : Tape position not identified

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

Display Cassette tape type <2>

00 Cassette type not identified

07 Small reel, thick tape T-5 08 - 0E C cassette, thick tape TC-10 09 - 15 C cassette, thick tape TC-20P 0A - 0B Small reel, thick tape T-20 0A - 16 C cassette, thin tape TC-30 0A - 16 C cassette, thin tape TC-40 0D - 0F Small reel, thick tape T-40 11 - 14 Small reel, thick tape T-60 15 - 18 Small reel, thick tape T-80 / DF-160 17 - 1A Small reel, thick tape T-90 / DF-180 19 - 1D Small reel, thick tape T-100 1D - 21 Small reel, thick tape T-120 / DF-240 1E - 1F Small reel, thin tape T-140 1F - 23 Small reel, thick tape T-130 21 - 23 Small reel, thin tape T-160 21 - 23 Small reel, thin tape T-168 22 - 24 Small reel, thick tape DF-300 22 - 24 Small reel, thin tape T-180 / DF-360 22 - 24 Small reel, thin tape T-210 / DF-420 22 - 23 Large reel T-5 23 - 24 Large reel T-10 25 - 26 Large reel T-20 27 - 29 Large reel T-30 29 - 2B Large reel T-40 2D - 2F Large reel T-60

Note:

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

1-16

+ 50 hidden pages

JVC SR-VC30U Service manual

TABLE OF CONTENTS

Important Safety Precautions

SECTION 1

1.1 HOW TO REMOVE THE MAJOR PARTS

1.3 DISCONNECTION OF CONNECTORS (WIRES)

1.2 HOW TO READ THE DISASSEMBLY AND ASSEMBLY

HOW TO REMOVE THE MAJOR PARTS <COM section>

HOW TO REMOVE THE MAJOR PARTS <VHS section>

HOW TO REMOVE THE MAJOR PARTS <DV section>

1.7 CONNECTION

1.8 SERVICE POSITIONS

1.9 Jig RCU mode

1.10 MECHANISM SERVICE MODE

1.11 Emergency display function