JVC HM-HDS1EU, HM-HDS1EK Service Manual

SERVICE MANUAL

HDD & S-VHS VIDEO RECORDER

VICTOR COMPANY OF JAPAN, LIMITED VIDEO DIVISION

S40894

HM-HDS1EK/EU

SPECIFICATIONS

GENERAL

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

Temperature

Operating position : Horizontal only Dimensions (WxHxD) : 435 mm x 124 mm x 385 mm Weight : 7.3 kg Input/Output : 21-pin SCART connectors:

HDD DECK VIDEO/AUDIO

Video format : MPEG2 (VBR) Audio format : MPEG1 Layer2 Maximum recording time (approx.)

VHS DECK VIDEO/AUDIO

No. 82887

Signal system : PAL-type colour signal and CCIR monochrome

Recording system : Format : S-VHS/VHS PAL standard Signal-to-noise ratio : 45 dB Horizontal resolution

HM-HDS1EK/EU

123

4 56

789

(The specifications shown pertain specifically to the model HM-HDS1EU)

Power on : 41 W Power off : 16 W

Operating : 5°C to 40°C Storage : –20°C to 60°C

IN/OUT x 1, IN/DECODER x 1 RCA connectors: VIDEO IN x 1, AUDIO IN x 1, AUDIO OUT x 1 S-Video connectors: IN x 1, OUT x 1

(SP) : 14 hours (LP) : 20 hours (EP) : 28 hours (SEP) : 40 hours

signal, 625 lines 50 fields DA4 (Double Azimuth) head helical scan system

(SP/LP) : 250 lines (VHS)

(EP) : 220 lines (VHS)

400 lines (S-VHS)

350 lines (S-VHS)

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

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

F - 1

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

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 : Approx. 60 min.

ACCESSORIES

Provided accessories : RF cable,

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

: 99 positions (+AUX position)

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

21-pin SCART cable, Satellite Controller, Infrared remote control unit, “R6” battery x 2

Printed in Japan

This service manual is printed on 100% recycled paper.

No. 82887

July 2001

Hard Disk Drive (HDD)

1. Hard Disk Drive (HDD) Handling Precautions

The HDD is a precision device for use in reading and writing a large amount of data on or from a disk rotating at a high speed. If it is not handled carefully, either abnormal operation may result or it may not be possible to read data. The HDD is sensitive to the following items and special care is required in safeguarding against them when handling an HDD. Also take care in handling a set incorporating an HDD.

1. Vibrations and impacts

2. Static electricity

3. Rough handling

1.1 Handling in transport, etc.

s Be sure to place the HDD in the manufacturer's specified package

carton before transport.

s When receiving a package containing an HDD, check that the pack-

age carton is not damaged (such as having holes in the carton, crushed corners, etc.).

s Do not impact the packaging carton when loading or unloading it. s It is not permitted to use the inner package carton only for transport-

ing an HDD.

s Do not stack package cartons one upon another.

Be sure to package and transport the HDDs correctly.

HDD Do not throw or drop packages.

1.2 Handling an HDD in the stand-alone status

s When handling an HDD on a hard workbench, place an antistatic

mat (rubber sheet) or similar object on the hard surface (to prevent any impacts occurring between the HDD and bench).

s Do not stack the HDDs one upon another. s Do not knock an HDD with a hard object (such as a screwdriver). s Do not place an HDD on its side panel without using a support (do

not place an HDD in an unstable position).

1.3 Handling the installation of an HDD

s Place antistatic mats or similar sheets on all of the surfaces on which work is conducted or when the HDD

is transported.

s Do not permit the HDD to knock against the set's brackets. s When screwing the brackets, be careful not to knock the HDD. When using a power screwdriver, use a low-

shock model and arrange the tightening torque properly.

s When mounting an HDD in a HDD/VHS DUAL RECORDER, take care not to apply excessive force to the

brackets.

2. In Case of an HDD Failure

When a HDD/VHS DUAL RECORDER AC cord is plugged into a power outlet, the boot loader is read from the IC8204 (8M FLASH ROM), which activates the HDD and reads the system files in the HDD before getting ready for operation. In consequence, the HDD/VHS DUAL RECORDER cannot be turned on if the HDD fails. In case a failure of the HDD is in doubt, use the following procedure to switch the main power of the set ON using the VHS section alone, by bypassing the HDD operation check.

(1) With the HDD/VHS DUAL RECORDER in the remote control

standby status, transmit code AE from the remote jig for more than 2 seconds.

(2) The REC LINK button on the HDD/VHS DUAL RECORDER

blinks, indicating that the power supply can be switched ON.

(3) When the code AE is transmitted again from the remote jig,

the button stops blinking and its function is canceled.

VHS

SYSCON

KBUS_IN

KBUS_OUT

E:08 is displayed in the

case of a

communication error

with the VHS SYSCON

HOSTDATA

40GB

HDD

AD 4:19

Firmware

HDD driver

Navigation information

AD 0:15

IDE 40PIN

AD 16:31

DVD 0_:7_

IC8204

8M FLASH

boot loader

VHS Navi

back up

OPEN

IC8205

Custom code 43: A code 52: B code 6F: C code 7F: D code

Data code

POWER

HM-HDS1

IC8206

LADO

4:11

LADO 12:19

IC8207

Latch

Address

Latch

Address

AD 4:11

AD 12:19

Initial mode

BS DIGIATL

HDD

Blinks.

CHANNEL

AD 0:31

IC8201IC8001

ASIC_IF MPEG_DEC

VIO 0:7

TABLE OF CONTENTS

Section Title Page Section Title Page

Hard Disk Drive (HDD)

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 SCREWS USED CABINET COMPONENTS AND BOARD ASSEMBLIES .. 1-1

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

1.5.1 Disassembly flow chart .................................................................. 1-2

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

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

1.6.1 Disassembly flow chart .................................................................. 1-4

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

Hard Disk Drive (HDD) Handling Precautions ...................................................... 1-6

1.7 HOW TO REMOVE THE MAJOR PARTS <HDD section> ............................ 1-6

1.7.1 Disassembly flow chart .................................................................. 1-6

1.7.2 DIsassembly/assembly method <HDD section> ............................1-6

1.8 SERVICE POSITIONS .................................................................................. 1-7

1.8.1 Service position <VHS SIDE> ........................................................ 1-7

1.8.2 Service position <HDD SIDE> ....................................................... 1-8

1.9 MECHANISM SERVICE MODE .................................................................... 1-9

1.9.1 How to set the "MECHANISM SERVICE MODE" .......................... 1-9

1.10 CONNECTION ........................................................................................... 1-10

1.11 EMERGENCY DISPLAY FUNCTION ........................................................ 1-12

1.11.1 Displaying the emergency information ................................................. 1-12

1.11.2 Clearing the emergency history ........................................................... 1-12

1.11.3 Emergency content description ............................................................ 1-13

1.11.4 Emergency detail information 1 ......................................................... 1-14

1.11.5 Emergency detail information 2 ......................................................... 1-15

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) ..

2.2.2 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 A/C 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

Change lever assembly, direct gear, clutch gear and coupling gear .

2.2.12

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

Loading arm gear (supply or take-up side) and loading arm gear shaft ..

2.2.16

2.2.17 Take-up lever, take-up head and control plate guide .................... 2-13

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

Tension brake assembly, reel disk (supply side) and tension arm assembly .

2.2.21

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 FM waveform linearity .................................................................. 2-16

2.3.2 Height and tilt of the A/C head ..................................................... 2-17

2.3.3 A/C head phase (X-value) ............................................................ 2-17

2.3.4 Standard tracking preset ..............................................................2-18

2.3.5 Tension pole position .................................................................... 2-18

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

2-6

2-10

2-12

2-14

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 level ....................................................................................... 3-3

3.3.3 PB Y level (S-VHS / VHS) .............................................................. 3-3

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

3.3.5 Video EQ (Frequency response) .................................................... 3-4

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

3.4 DIGITAL CIRCUIT ......................................................................................... 3-4

3.4.1 HDD EE Y level .............................................................................. 3-4

3.4.2 HDD PB Y level .............................................................................. 3-5

3.4.3 HDD PB C burst level ..................................................................... 3-5

3.5 AUDIO CIRCUIT ........................................................................................... 3-5

3.5.1 Audio REC FM ...............................................................................3-5

3.6 SYSCON CIRCUIT [HM-HDS1EU] ............................................................... 3-6

3.6.1 Timer clock ..................................................................................... 3-6

4. CHARTS AND DIAGRAMS

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

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

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

4.2

SWITCHING REGULATOR AND REGULATOR SCHEMATIC DIAGRAMS ...........

4.3 VIDEO/AUDIO SCHEMATIC DIAGRAM ....................................................... 4-7

4.4 SYSTEM CONTROL SCHEMATIC DIAGRAM ............................................. 4-9

4.5 VIDEO I/O SWITCH SCHEMATIC DIAGRAM ............................................ 4-13

4.6 AUDIO I/O SCHEMATIC DIAGRAM ............................................................ 4-15

4.7 CONNECTION SCHEMATIC DIAGRAM .................................................... 4-17

4.8 TUNER SCHEMATIC DIAGRAM ................................................................ 4-19

4.9 3D DIGITAL/2M SCHEMATIC DIAGRAM ................................................... 4-21

4.10 TERMINAL SCHEMATIC DIAGRAM ........................................................ 4-23

4.11 DEMODULATOR SCHEMATIC DIAGRAM ............................................... 4-25

4.12 S-SUB SCHEMATIC DIAGRAM ............................................................... 4-27

4.13 ON SCREEN SCHEMATIC DIAGRAM ..................................................... 4-29

EJECT SW, DISPLAY, JACK, LED/SW AND LED SCHEMATIC DIAGRAMS ..

4.14

4.15 DIGITAL P.SUP SCHEMATIC DIAGRAM .................................................. 4-33

4.16 DIGITAL VIDEO SCHEMATIC DIAGRAM ................................................. 4-35

4.17 DIGITAL AUDIO SCHEMATIC DIAGRAM ................................................ 4-37

4.18 DIGITAL MPEG DEC SCHEMATIC DIAGRAM ......................................... 4-39

4.19 DIGITAL MPEG ENC SCHEMATIC DIAGRAM ......................................... 4-41

4.20 DIGITAL ASIC IF SCHEMATIC DIAGRAM ............................................... 4-43

4.21 SWITCHING REGULATOR AND REGULATOR CIRCUIT BOARDS ....... 4-45

4.22 3D DIGITAL/2M AND S-SUB CIRCUIT BOARDS .................................... 4-47

4.23 TERMINAL CIRCUIT BOARD .................................................................. 4-48

4.24 EJECT SW, DISPLAY, JACK, LED/SW, AND LED CIRCUIT BOARDS .... 4-49

4.25 MAIN CIRCUIT BOARD ........................................................................... 4-51

4.26 DEMODULATOR AND ON SCREEN CIRCUIT BOARDS........................ 4-54

4.27 DIGITAL CIRCUIT BOARD ....................................................................... 4-55

4.28 FDP GRID ASSIGNMENT AND ANODE CONNECTION ........................ 4-58

4.29 DIGITAL SUB SCHEMATIC DIAGRAM .................................................... 4-59

4.30 DIGITAL SUB CIRCUIT BOARD .............................................................. 4-61

4.31 REMOTE CONTROL SCHEMATIC DIAGRAM ........................................ 4-62

4.32 WAVEFORMS ........................................................................................... 4-63

4.33 VOLTAGE CHARTS .................................................................................. 4-65

4.34 CPU PIN FUNCTION................................................................................ 4-68

4.35 SYSTEM CONTROL BLOCK DIAGRAM (VHS) ....................................... 4-69

4.36 AUDIO BLOCK DIAGRAM ........................................................................ 4-71

4.37 VIDEO BLOCK DIAGRAM(VHS) .............................................................. 4-73

4.38 VIDEO/AUDIO BLOCK DIAGRAM (HDD) ................................................ 4-77

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

SW.REG BOARD ASSEMBLY <01> ......................................................... 5-6

REG BOARD ASSEMBLY <02> ............................................................... 5-7

MAIN BOARD ASSEMBLY <03> .............................................................. 5-8

3D DIGITAL/2M BOARD ASSEMBLY <05> ............................................ 5-15

TERMINAL BOARD ASSEMBLY <06> ................................................... 5-17

A/C HEAD BOARD ASSEMBLY <12> .................................................... 5-18

DEMOD BOARD ASSEMBLY <14> ........................................................ 5-18

S-SUB BOARD ASSEMBLY <15> .......................................................... 5-19

ON SCREEN BOARD ASSEMBLY <17> ................................................ 5-20

EJECT SW BOARD ASSEMBLY <27> ................................................... 5-20

SW/DISPLAY BOARD ASSEMBLY <28> ................................................ 5-20

JACK BOARD ASSEMBLY <36> ............................................................ 5-21

LED/SW BOARD ASSEMBLY <47> ....................................................... 5-22

DIGITAL SUB BOARD ASSEMBLY <49> ............................................... 5-22

DIGITAL BOARD ASSEMBLY <50> ........................................................ 5-22

LOADING MOTOR BOARD ASSEMBLY <55> ....................................... 5-27

LED BOARD ASSEMBLY <90> .............................................................. 5-27

4-5

4-31

The following table lists the differing points between Models ( HM-HDS1EK and HM-HDS1EU) in this series.

HM-HDS1EK HM-HDS1EU

VIDEO SYSTEM PAL/NTSC ON PAL TV PAL/MESECAM(MANUAL)/NTSC ON PAL TV BROADCASTING STANDARD I B/G,D/K STEREO DECODER NICAM NICAM/A2 VCR PLUS+ VIDEOPLUS+ DELUXE SHOWVIEW DELUXE VPS(AUTO) NOT USED USED INITIAL (TIMER) OFF GER,AUS,SWISS:ON, OTHER:OFF LANGUAGE [INITIAL] (ON SCREEN DISPLAY) POWER PLUG 3PIN CEE

ENG 10 LANG. [E]

Important Safety Precautions

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 ! 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.

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.

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

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

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.

Fig. 10

Table 1 Specifications for each region

Table 2 Leakage current specifications for each region

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

S40888-01

SECTION 1

DISASSEMBLY

1.1 HOW TO REMOVE THE MAJOR PARTS

1.1.1 Introduction

This set is a double-deck video recorder integrating a HDD (Hard Disk Drive) and a VHS deck. Its internal structure is divided into three sections that include the power supply, VHS and HDD 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. HDD section

< TOP VIEW >

1. COMMON section

3. HDD section

2. VHS 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.

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

COM2 8(L3),

CN7507(WR1), CN3011(WR2)

Point NotePart name

—

§§ §§ §

(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

1.3 DISCONNECTION OF CONNECTORS (WIRES)

FPC

CONNECTOR

FPC

CONNECTOR

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

FPC

CONNECTOR

FPC

CONNECTOR

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

FPC

CONNECTOR

Fig. 1-3-5

1.4 SCREWS USED CABINET COMPONENTS AND BOARD ASSEMBLIES

Table 1-4-1 below shows the symbols, shapes, colors and part numbers of screw that are used in the cabinet components and board assemblies and are appearing in the disassembling/reassembling diagrams in this manual. When screwing them again in reassembling, be sure to use them correctly referring to the following table.

Notes:

• Screw that are asterisked (marked with*) in the shape col-

umn are fixed with screw lock agent. If such the screw is once removed, never use it again.

• The Screw symbols are assigned nos. in priority order and

do not correspond to those on the spare parts list.

SYMBOL PARTS NO. COLOR

S1 QYTDST3006R SILVER BLACK

S2 QYTDST3006M BLACK

S3 QYTDSF3010Z GOLD

S4 QYTDSF2606Z GOLD

S5 QYTDST3006Z GOLD

S6 QYTDSF3008M BLACK

S7 QYTDST2610Z GOLD S8 PQ40413 BLACK S9 LP40700-001A BLACK

S10 LP40738-001A GOLD

Table 1-4-1

1-1

HOW TO REMOVE THE MAJOR PARTS <COM section>

1.5

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.

1 Top cover, Bracket

2 Front panel assembly

Display board assembly, LED/SW board assembly,

Eject SW board assembly, Jack board assembly, LED board assembly

4 SW REG board assembly

5 Regulator board assembly

6 Rear cover

Disassembly/assembly method <COM section>

1.5.2

Step/

Loc No.

Top cover, Bracket COM1

Front panel

assembly

Fig. No.

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

COM2 8(L3),

CN7507(WR1),

Point NotePart name

—

CN3011(WR2)

Display board assembly,

LED/SW board assembly, Eject SW board assembly,

COM3 15(S4)

—

Jack board assembly, LED board assembly

SW REG board

assembly

Regulator board

assembly

COM4 2(S5), 2(L4), (L5)

CN5301(WR3),

COM5 3(L6),

CN5322(WR4), CN5321(WR5),

CN5325(WR6), CN5326(WR7), CN5323(WR8)

COM6 4(S2), 6(S6),

Fan motor

<Note 5>Rear cover

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

When attaching the front panel assy, make sure that the door openers of cassette housing assembly is in the down position.

When attaching the FPC take care that it is not caught. Pass the two VHS-side FPCs below the base (1).

When removing the SW REG board assembly or Regulator board assembly, unhook the several spacers connecting it with pliers from the top side.

Perform the work by leaving fan motor attached to the rear cover except when replacing the fan motor. When attaching the rear cover, please be careful with the wiring.

(S1)

(L3)

(L1)

(L3)

(S1)

Digital board assembly

Base (1)

(L3)

(L2)

(S3)

Top cover

CN3011

WR2

(S2)

(S3)

Fig. COM1

Fig. COM2

Bracket

WR1

(L3)

(S2)

(S1)

CN7507

<Note 1> Supporing tape side

(S2)

(S1)

1-2

CN5325

CN5326

WR8

WR5 Foil side <Note 1>

WR4 Foil side <Note 1>

WR6

WR7

CN5321

CN5322

(L6) Spacer <Note 4>

(L6)

Spacer

CN5323

(S4)

Eject SW board assembly

Jack board assembly

(S4)

LED/SW board assembly

(S4)

LED board assembly

Display board assembly

(S4)

(L5)

(S5)

Spacer

(L4)

Fig. COM3

(S5)

Fig. COM4

WR3 Supporting tape side <Note 1>

CN5301

(S2)

Fig. COM5

(S6)

Fig. COM6

(S6)

<Note 5> Fan Motor

(S6)

(S2)

1-3

HOW TO REMOVE THE MAJOR PARTS <VHS section>

1.6

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.)

1 Drum assembly

2 Mechanism assembly

3 Main board assembly

4 Base (1)

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

1.6.2 DIsassembly/assembly method <VHS section>

Step/

Loc No.

Drum assembly

(Inertia plate) (Roller arm assy)

Mechanism assembly

Main board

3 <Note 2>

assembly

Base (1) V4 (S3), 3(S5)4 —

Fig. No.

3(S7), CON1(WR9), CN1(WR10)

4(L1)

(P1), (L2)

2(S3), (S8), (S9), (L3), (L4), CN1(WR11),

V3 2(S3), (S5),

CN5321(WR5), CN5322(WR4), CN3014(WR14), CN703(WR15), CN2601(WR16)

Point NotePart name

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 attaching wires, connect them in the correct orientation.

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 (S7) in the order of a , b , c .

Roller arm assy

Inertia plate

(L1)

(P1)

(L2)

(S7)

WR9 Foil side

CON1

(S7)

WR10 Foil side <Note 1,2>

Cleaner assy

• When it is required to remove the screws (S3) retaining the Mechanism assembly, please refer to the “Procedures for Lowering the Cassette holder assembly”(See on page 1-5).

• 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.

• 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).

1-4

Not use

CN1

Fig. V1

(S3)

(S5)

(S3)

WR16 Foil side <Note 2>

CN5322

CN703

WR15

CN2601

CN3014

WR4 Foil side <Note 2>

WR5 Foil side <Note 2>

WR14 Foil side <Note 2>

CN5321

Note: When installing the Mechanism assembly, secure

the screws (S8) in the order of a , b .

(S3)

(S8)

(S3)

WR11 Foil side <Note 2>

(S9)

(L4) Spacer <Note 4>

(S5)

Fig. V3

(S5)

Mechanism assy

Spacer

(L3) Spacer <Note 4>

Fig. V2

S3002 S cassette switch <Note 4>

(S3)

Fig. V4

1-5

Hard Disk Drive (HDD) Handling Precautions

1 Hard disk drive assembly 2 Hard disk 3 Digital board assembly

1.7

HOW TO REMOVE THE MAJOR PARTS <HDD section>

1.7.1 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” and 2 “Front panel assembly” in advance. (See section 1.5.)

1 Hard disk drive assembly

(S5)

(S5)

WR7

Frame

CN8001

(S5)

Fig. H1

(S5)

WR15

Earth

wire

CN5326

2 Hard disk drive

3 Digital board assembly

1.7.2 DIsassembly/assembly method <HDD section>

Step/

Loc No.

Hard disk drive assembly

Hard disk drive H2

Digital board assembly

Fig. No.

H1 4(S5),

H3 4(S5),

Point NotePart name

CN5326(WR15) 4(S10)

<Note 3,4> CN8901(WR8), CN8002(WR12), CN8601(WR13), CN8801(WR14)

With due regard to operational considerations, remove the parts located on the frame (Hard disk drive) together before removing the major parts.

When attaching the hard disk drive assembly, be sure to connect the earth wire.

• When connecting or disconnecting the connector or wire, take care not to damage them.

• When connecting the flat wire to the connector, be sure to connect it in the correct orientation.

When removing the board assembly, take care not to damage it.

(S5)

CN8901

CN8002

Frame

CN8601

(S5)

CN8801

(S10)

(S5)

(S10)

Fig. H2

(S10)

WR13

WR8

WR12

Foil side

WR14

Supporting

tape side <Note 3>

1-6

Fig. H3

1.8 SERVICE POSITIONS

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

I SERVICE POSITIONS <VHS SIDE>

II SERVICE POSITIONS <HDD SIDE>

1.8.1 Service position <VHS SIDE>

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

mechanism assembly.

Fig. No.

(Page)

(1)

Top cover,

COM1 9 2 + 1

Bracket (1-3) (No.1-9) (L1,2)

(2) Front

panel

COM2 0 8 2

(1-3) (L3) (CN7507/ —

assembly

(3) Rear

cover

(4) Main

board

COM6 10 0 1

(1-3)

V2, V3 7 0 5

(1-6) (No.4-10) (CN5321/ assembly (etc.)

Screw Hook, etc. Connector Note

0 —

CN3011)

(No.28-37)

(CN5325)

CN5322/ CN3014/

—

CN703/ CN2601)

< Installation >

(1) Stand up the bottom chassis assembly so that the Regu-

lator side is in the lower position.

(2) Connect the PATCH CORD to the three FPCs then con-

nect CN3014, CN7508 and CN7509.

(3) By connecting a total of two FPCs and wires (CN703/

CN2601), carry out the installation so that the Main board assembly comes in the upper position.

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

subjected to stress in this positioning.

(4) Connect the PATCH CORDS to the two FPCs of the front

panel assembly, then connect the CORDS to the CN7507/CN3011.

For the PATCH CORD is required, see Table 1-8-2.

Board to Board WIRE

A PTU94022-10 QUQ112-1040CG

B PTU94022-18 QUQ112-1840CG

C PTU94022-13 QUQ212-1340CG

D PTU94022-15 QUQ212-1540CG

E YTU94072-06 QUQ210-0640CG

Table 1-8-2

Table 1-8-1

PATCH CORD

PTU94017B

Front panel assembly

Main board assembly

CN7509

CN7507

CN3011

CN3014

CN703

CN7508

CN2601

CN8801

CN5322

CN5321

CN8601

CN8002

Fig. 1-8-1 Service position <VHS side>

1-7

1.8.2 Service position <HDD SIDE>

(1) Remove the exterior parts (Top cover and front panel as-

sembly). (2) Remove the hard disk drive(HDD) together with the frame. (3) Remove the digital board assembly together with the wires

attached to it, and place the assembly upside down on

an insulated mat that is placed on the mechanism (VHS)

assembly. (4) Mount the HDD that was removed in (2) to its original

position on the bottom chassis assembly, and connect

the wires to the connector CN8001 on the digital board

assembly and to the connector CN5326 on the regulator

board assembly.

Fig. No.

(Page)

Screw

(No.)

Hooks,

etc. (No.)

Connectors

Note

(1) Top cover, COM1 9 2 + 1 0 —

Brackets (1-3) (No.1-9) (L1, L2)

(2) Front panel COM2 0 8 (L3)

2(CN7507,

—

assembly (1-3) CN3011)

Hard disk drive

(3)

H1 4 0

2 (CN8001,

—

assembly (1-6) (No.1-4) CN5326)

(4) Digital board H3 4 0 0 —

assembly

(No.9-12)

Table 1-8-3

PATCH CORD

PTU94017B

Hard disk drive assembly

Front panel assembly

CN3011

CN8001

CN8801

CN8601

CN7507

Fig. 1-8-2 Service position <HDD side>

CN8901

Insulation sheet

CN8002

Digital board assembly

Note :

•

The symbol numbers in the following table are special numbers indicating the service positions. They do not coincide with the symbol numbers used in Fig. 1-10-1 (1-10) or Table 1-10-1 (1-11).

SYMBOL CONNECTOR (WIRE) CONNECTIONS

PIN No

PATCH CORD

I / II 1 MAIN CN7507 — JACK CN7002 10 A

I / II 2 MAIN CN3011 — DISPLAY CN7001 18 B

I 3 TERMINAL CN703 — DIGITAL CN8601 6 —

I 4 MAIN CN7508 — REGULATOR CN5322 13 C

I 5 MAIN CN7509 — REGULATOR CN5321 15 D

I 6 MAIN CN2601 — DIGITAL CN8801 8 —

I / II 7 MAIN CN3014 — DIGITAL CN8002 6 E

II 8 DIGITAL CN8001 — HARD DISK DRIVE 40 —

II 9 REGULATOR CN5326 — HARD DISK DRIVE 4 —

II 10 REGULATOR CN5323 — DIGITAL CN8901 9 —

Table 1-8-4 Connection of Connectors

1-8

1.9 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”.

1.9.1 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 “Pro- cedures for Lowering the Cassette holder assembly” on page 1-5 of 1.6 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.

Swithing regulator board assembly

Hard disk drive

(HDD)

Fan motor

Regulator

board assembly

Main board assembly

TPGND

Terminal board assembly

S-Sub board assembly

VR701 DV AG C

TP701

On screen

D AGC

board assembly

TP106 PB FM

VHS mechanism

CN3011 CN7507

3D Digital /2M board assembly

VR1401 D/A LEVEL ADJ

Demodulator board assembly

TP2253 A.PB FM

TP4001 CTL.P

TP111 D.FF

TP7001 TEST

TPGND

PATCH CORD PTU94022-18 QUQ112-1840CG

LED SW board assembly

LED board assembly

Display board assembly

Fig. 1-9-1

Supporting tape side

PATCH CORD PTU94022-10 QUQ112-1040CG

Jack board assembly

Eject SW board assembly

1-9

1.10 CONNECTION

TOP VIEW

Treat wire so as not to come to the FAN motor.

CN5325

CN8601

Foil side Foil side

CN5321

Foil side

Make a crease.

CN3014

CN5323 (Middle)

CN5326 (Upper)

Foil side

CN8801

Foil side

CN2601

Supporting

tape side

CN703

DRUM

Supporting tape side

CON1

FAN motor

CN5322

Make a crease.

CN5301

Supporting tape side

CN8002

(Lower)

CN5201

CN8901

CN8001

Make a crease.

CN8201

CN512

CN7506

Make a crease.

CN1

Foil side

CN1

A/C HEAD Should be confirmed that wire not touch to IC of the Stator board assembly.

CN7508

Treat the wire

CN7509

Supporting tape side

according to the figure not to overlap in TP.

Make a crease.

Foil side

CN2001

CN3001

CN8202

DETAIL "A" DETAIL "C"

DRUM

Chassis

Main board

assembly

Absorb the looseness of the wire in the B part.

DETAIL "B"

Treat the front wires according to the figure.

CN1

Main board assembly

Base(1)

Treat the wire through the hole.

DETAIL "D"

HDD

CN8001

The wire should be does not touch from edge.

CN3011 CN7507

CN3014

Main board

assembly

Frame

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

Digital board

assembly

Fig. 1-10-1 Top view

Foil side

[CAUTION]

Insert the FPC wires as shown below.

Foil side Supporting tape side

1-10

Fig. No.

Symbol

Connection

Pin No.

Connected point ←→ Connected point

Type

(FPC/

WIRE)

1 WR1 MAIN CN7507 ←→ JACK CN7002 10 FPC

2 WR2 MAIN CN3011 ←→ DISPLAY CN7001 18 FPC

3 WR3 REGULATOR CN5301 ←→ SW REG CN5201 19 FPC

4 WR4 REGULATOR CN5322 ←→ MAIN CN7508 13 FPC

5 WR5 REGULATOR CN5321 ←→ MAIN CN7509 15 FPC

6 WR6 REGULATOR CN5325 ←→ FAN MOTOR — 2 WIRE

7 WR7 REGULATOR CN5326 ←→ HDD — 4 WIRE

8 WR8 REGULATOR CN5323 ←→ DIGITAL CN8901 9 WIRE

9 WR9 DRUM MOTOR CON1 ←→ MAIN CN3001 5 FPC

10 WR10 MAIN CN1 ←→ UPPER DRUM — 11 FPC

11 WR11 A/C HEAD CN1 ←→ MAIN CN2001 7 FPC

12 WR12 MAIN CN3014 ←→ DIGITAL CN8002 6 FPC

13 WR13 MAIN CN703 ←→ DIGITAL CN8601 6 WIRE

14 WR14 MAIN CN2601 ←→ DIGITAL CN8801 8 FPC

15 WR15 DIGITAL CN8001 ←→ HDD — 40 WIRE

16 — MAIN CN7506 ←→ S-SUB CN512 14 FPC

—— DIGITAL CN8201 ←→ Jig CONN. CABLE — 100 WIRE

—— DIGITAL CN8202 ←→ Jig CONN. CABLE — 6 FPC

Table 1-10-1 Connection

1-11

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. With the status of the VCR and mechanism at the moment an emergency occurred can also be confirmed.

FDP display switching

FDP display

Notes:

•

The emergency detail display on the latest emergency. It becomes “ – – : – – : – –” when there is no latest emergency record.

•

When using the Jig RCU, set its custom code to match the custom code of the VCR.

Jig RCU

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

0 : 00 : 00

E: **:

1: *2 : 34

5: *6 :

CUSTOM CODE 43: A CODE 53: B CODE 6F: C CODE 7F: D CODE

DATA CODE

Fig. 1-11-1 Jig RCU [PTU94023B]

Normal display

Emergency content display

(E:Latest:Previous)

Emergency detail display

1 2

show the information

INITIAL MODE

1.11.1 Displaying the emergency information

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

The FDP shows the emergency content in the form of “E:

:**”.

Example 1 E : 01 :

Example 2 E : –– :

Note:

For the emergency content, see “1.11.3 Emergency content description”.

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

The FDP shows the emergency detail information 1 in the form of “

* *

3 – : Mechanism sensor information at the moment of

– 4 : Mechanism mode position at the moment of emer-

Note:

•

For the emergency detail information Emergency detail information

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

The FDP shows the emergency detail information 2 in the form of “

* *

Note:

•

For the emergency detail information 2 , see “1.11.5 Emergency detail information

1 : *2 : 34”.

1 : Deck operation mode at the moment of emergency 2 : Mechanism operation mode at the moment of emer-

gency

emergency

gency

5 : *6 :

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)

Previous emergency

Latest emergency

––

No emergency record

, see “1.11.4

”.

7 ”.

”.

1-12

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

set the display.

1.11.2 Clearing the emergency history

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

1.11.3 Emergency content description

Emergency 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:

HDD Communication 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 the KBUS_DATA signal did not reach the pin-46 of the System controller CPU (IC3001) on the main board assembly, [E:08] is identified, "POWER ON" operation is rejected.

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.

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 HDD is defective 2 KBUS_DATA signal is disconnected in the middle.

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.)

6 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/

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 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.

Table 1-11-1

1-13

1.11.4 Emergency 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 emergency can be confirmed based on the figure in EMG detail information 1 .

[FDP display]

1 : *2 : 34

1 : Deck operation mode at the moment of emergency

2 :

Mechanism operation mode at the moment of emergency

3 –

: Mechanism sensor information at the moment of emergency

– 4 :

Mechanism mode position at the moment of emergency

Note:

•

In the Deck operation mode/Mechanism operation mode/ Mechanism mode position, the contents of the code that is shown on the FDP differs depending on the parts number of the System Control microprocessor (IC3001) of the VCR. For the microprocessor parts number that starts with the two letters “MN”, refer to the Table of MN and for parts number with “HD”, refer to the Table of HD.

2 : Mechanism Operation Mode

[Table of MN]

Display

00 Command standby (Status without executing command) 02 POWER OFF by EMG occurrence 04 Moving to the adjacent position in the LOAD direction 06 Moving to the adjacent position in the UNLOAD direction 08 Cassette ejection being executed 0A Cassette insertion being executed 0C Tape being loaded 0E Tape being unloaded 10 Mode transition to STOP with pinch roller compression ON 12 Mode transition to STOP with pinch roller compression OFF 14 Mode transition to STOP with pinch roller compression OFF as a result

of POWER OFF

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

POWER ON 18 Mode transition to PLAY 1A Mode transition to FWD SEARCH 1C Mode transition to REC 1E Mode transition to FWD STILL/SLOW 20 Mode transition to REV STILL/SLOW 22 Mode transition to REV SEARCH 24 Mode transition from FF/REW to STOP 26 Mode transition to FF 28 Mode transition to REW 2A 4 sec. of REV as a result of END sensor going ON during loading 2C Short FF/REV as a result of tape sensor going ON during unloading 2E Mechanism position being corrected due to overrun 80 Mechanism in initial position (Dummy command)

Mechanism Operation Mode

1 : Deck Operation Mode

[Table of MN]

Display

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

Cassette identification FWD SEARCH before transition to FF (SP x7-speed) 24 FWD SEARCH (variable speed) including x2-speed 2C INSERT REC 40 REW 42

Cassette identification REV SEARCH before transition to REW (SP x7-speed) 44 REV SEARCH (variable speed) 4C AUDIO DUB 6C INSERT REC (VIDEO + AUDIO) 84 FWD STILL/SLOW 85 REV STILL/SLOW 8C REC PAUSE 8D Back spacing 8E Forward spacing (FWD transport mode with BEST function) AC INSERT REC PAUSE AD INSERT REC Back spacing CC AUDIO DUB PAUSE CD AUDIO DUB Back spacing EC INSERT REC (VIDEO + AUDIO) PAUSE ED INSERT REC (VIDEO + AUDIO) Back spacing

Deck Operation Mode

[Table of HD]

Display

00 STOP with pinch roller pressure off (or tape present with P.OFF) 01 STOP with pinch roller pressure on 04 PLAY 0E REC 11 Cassette ejected 22 FF 26 FWD SEARCH (variable speed) including x2-speed 2E INSERT REC 43 REW 47 REV SEARCH (variable speed) 4C AUDIO DUB 6E INSERT REC (VIDEO+AUDIO) 84 FWD STILL/SLOW 85 REV STILL/SLOW 8F REC PAUSE AF INSERT REC PAUSE CD AUDIO DUB PAUSE EF INSERT REC (VIDEO+AUDIO) PAUSE

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 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

1-14

3 – : Mechanism Sensor Information

[Common table of MN and HD]

Display

0– VHS Tab broken ON ON 1– VHS Tab broken ON OFF 2– VHS Tab broken OFF ON 3– VHS Tab broken OFF OFF 4– VHS Tab present ON ON 5– VHS Tab present ON OFF 6– VHS Tab present OFF ON 7– VHS Tab present OFF OFF 8– S-VHS Tab broken ON ON

9– S-VHS Tab broken ON OFF A– S-VHS Tab broken OFF ON B– S-VHS Tab broken OFF OFF C– S-VHS Tab present ON ON D– S-VHS Tab present ON OFF E– S-VHS Tab present OFF ON

F– S-VHS Tab present OFF OFF

– 4 : Mechanism Mode Position

Mechanism Sensor Information

S-VHS SW

REC SAFETY SW

START SENSOR

END SENSOR

[Table of MN]

Display

-0 Initial value

-1 EJECT position

-2 Housing operating

-3 U/L STOP position Tape being loaded/unloaded (When the pole base is located on the front

-4 side of the position just beside the drum)

-5 Tape being loaded/unloaded (When the pole base is located on the rear side of the position just beside the drum)

-6 Pole base compressed position

-7 FF/REW position

-8 Between FF/REW and STOP with pinch roller compression ON

-9 STOP with pinch roller compression OFF

-A Between STOP with pinch roller compression OFF and REV

-B REV (REV STILL/SLOW) position

-C Between REV and FWD

-D FWD (FWD STILL/SLOW) position

-E Between FWD and PLAY

-F PLAY position

Mechanism Mode Position

[Table of HD]

Display

–0 EJECT position –1 U/L STOP position –2 Tape being loaded/unloaded (When the pole base is located on the rear

side of the position just beside the drum)

–3 FF/REW position –4 STOP with pinch roller pressure off –5 REV (REV STILL/SLOW) position –6 FWD (FWD STILL/SLOW) position, PLAY position –7 Intermediate position during transition between other mechanism modes

Mechanism Mode Position

Note:

As the display is always “–7” at any intermediate position

•

between mechanism modes, the position of transitory EMG may sometimes not be locatable.

1.11.5 Emergency 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 display]

5 : *6 :

* *

Note:

•

EMG detail information 2 is the reference information

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

(Winding area)

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” : Tape position not identified

7 : Cassette tape type 2 (Winding area)

Display Cassette Tape Type 2

Cassette type not identified

08 - 0E

0A - 0B 0A - 16 0A - 16 0D - 0F

17 - 1A 19 - 1D 1D - 21 1E - 1F 1F - 23

29 - 2B 2D - 2F

Small reel, thick tape T-5 C cassette, thick tape TC-10

09 - 15

C cassette, thick tape TC-20P Small reel, thick tape T-20 C cassette, thin tape TC-30 C cassette, thin tape TC-40 Small reel, thick tape T-40

11 - 14

Small reel, thick tape T-60

15 - 18

Small reel, thick tape T-80/DF-160 Small reel, thick tape T-80/DF-180 Small reel, thick tape T-100 Small reel, thick tape T-120/DF-240 Small reel, thin tape T-140 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-380

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 Large reel T-40 Large reel T-60

Note:

•

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

1-15

SECTION 2

MECHANISM ADJUSTMENT

2.1 Before starting repair and adjustment

2.1.1 Precautions

(1) Unplug the power cord plug of the VCR before using your

soldering iron.

(2) Take care not to cause any damage to the conductor

wires when plugging and unplugging the connectors.

(3) Do not randomly handle the parts without identifying

where the trouble is.

(4) Exercise enough care not to damage the lugs, etc. dur-

ing the repair work.

(5) When reattaching the front panel assembly, make sure

that the door opener of the cassette holder assembly is lowered in position prior to the reinstallation. (See SECTION 1 DISASSEMBLY.)

(6) 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). (See SECTION 1 DISASSEMBLY.)

Loading motor

2.1.2 Checking for proper mechanical operations

Enter the mechanism service mode when you want to operate the mechanism when no cassette is loaded. (See SECTION 1 DISASSEMBLY.)

2.1.3 Manually removing the cassette tape

1. In case of electrical failures

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

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

assembly of the major parts before removing the drum assembly.

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

loading motor of the mechanism assembly toward the front. In doing so, hold the tape by the hand to keep the slack away from any grease. (See Fig.2-1-3a.)

(4) Bring the pole base assembly to a pause when it reaches

the position where it is hidden behind the cassette tape.

(5) Move the top guide toward the drum while holding down

the lug (A) of the bracket retaining the top guide. Likewise hold part (B) down and remove the top guide. Section (C) of the top guide is then brought under the cassette lid. Then remove the top guide by pressing the whole cassette tape down. (See Fig.2-1-3b.)

(6) Remove the cassette tape by holding both the slackened

tape and the cassette lid.

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

pletes removal of the cassette tape.

Note:

• For the disassembly procedure of the major parts and details of the precautions to be taken, see “SECTION 1 DISASSEMBLY”.

Pole base assembly

Fig. 2-1-3a

(C)

(A)

(B)

Press

Fig. 2-1-3b

2-1

2. In case of mechanical failure

Roller driver

PTU94002

A/C head positioning tool

PTU94010

Back tension cassette gauge

PUJ48076-2

Jig RCU

PTU94023B

Torque gauge

PUJ48075-2

Alignment tape

(SP, stairstep, PAL)

MHPE

Alignment tape

(LP, stairstep, PAL)

MHPE-L

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

(1) Unplug the power cable and remove the top cover, front

panel assembly and others so that the mechanism assembly is visible. (See SECTION 1 DASASSEMBLY.)

(2) While keeping the tension arm assembly of the mecha-

nism assembly free from tension, pull the tape on the pole base assembly (supply or take-up side) out of the guide roller. (See Fig.2-1-3c.)

(3) Take the spring of the pinch roller arm assembly off the

hook of the press lever assembly, and detach it from the tape. (See Fig.2-1-3d.)

(4) In the same way as in the electrical failure instructions in

2.1.3-1(5), remove the top guide.

(5) Raise the cassette tape cover. By keeping it in that posi-

tion, draw out the cassette tape case from the cassette holder and take out the tape.

(6) By hanging the pinch roller arm assembly spring back

on the hook, take up the slack of the tape into the cassette.

Pole base assembly (take-up side)

2.1.4 Jigs and tools required for adjustment

Pole base assembly

(supply side)

Tension arm assembly

Fig. 2-1-3c

Take the spring off the hook, and detach it from the tape.

Guide pole guard

Pinch roller arm assembly

Press lever assembly

Fig. 2-1-3d

2-2

2.1.5 Maintenance and inspection

1. Location of major mechanical parts

In this chapter, the two mechanism speeds are described by comparing the speeds of the standard type and the high-speed FF/REW type. It is possible to distinguish between these two types of mechanism by the diameters of their capstan pulleys. The capstan pulley diameter for the standard type is approx. 32 mm. The capstan pulley diameter for the high-speed FF/REW type is approx. 43 mm. For information on the different parts used in the two mechanism types, please refer to the “Replacement of major parts”.

UV catcher2 (supply and take-up side)

Stator assembly

Full erase head

T26

Pole base assembly

T25

(supply side)

Tension arm

T24

assembly

T23

Tension brake

T22

assembly

Adjust pin

T5 T7

Drum assembly

Head base

A/C head

Loading motor

Guide pole guard

Pinch roller arm

assembly

Lid guide

T10

Press lever

T11

assembly

Guide arm

T12

assembly

Reel disk

T13

(take-up side)

Sub brake assembly

T14

(take-up side)

Belt

B22

(loading motor)

B21

Control cam

B20

B19

Cassette gear

B18

Worm gear

Brake lever

Rec safety lever

Reel disk

T20

(supply side)

Main brake assembly (supply side)

Idler lever

T17T19T21

Idler arm assembly

T16T18

Pole base assembly (take-up side)

Fig. 2-1-5a Mechanism assembly top side

Capstan motor

Capstan brake assembly

B3 B5

Belt (capstan)

Loading arm gear (take-up side)

Loading arm gear (supply side)

Main brake assembly

T15

(take-up side)

Plate

(supply side)

Control

bracket1

Control plate

Tension arm

bearing

2-3

Link lever

B17

Rotary encoder guide

B16

Rotary encoder

B15

B14

Direct gear

B13

Change lever assembly

B12

B10

Clutch unit

Take-up head

Fig. 2-1-5b Mechanism assembly bottom side

Take-up lever

B11

Guide rail Roller cam assembly

L2L1

Fig. 2-1-5c Mechanism assembly left side

Opener guide

Door

opener

Drive gear

Cassette housing bracket

Limit gear

Loading motor

Worm gear

Belt (loading motor)

Fig. 2-1-5d Mechanism assembly right side

2. 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.

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

head), soak a piece of closely woven cloth or Kimu-wipe with alcohol and while holding the cloth onto the upper drum by the fingers, turn the upper drum counterclockwise.

Note:

• Absolutely avoid sweeping the upper drum vertically as this will cause damage to the video head.

(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 video tape.

3. 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.

4. 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

Upper drum assembly

A/C head

Lower drum assembly

Pinch roller arm assembly

Full erase head

Tension arm assembly

Tape transport

Capstan motor (Shaft)

Guide arm assembly

Capstan motor

Capstan brake assembly

Main brake assembly

Belt (Capstan)

Belt (Loading motor)

Loading motor

Clutch unit

Worm gear

Control plate

Brush

Tension brake assembly

Other Drive

Rotary encoder

: Cleaning

: Inspection or replacement if necessary

Operation Hours

~1000H ~2000H

¤R R ¤R ¤R

¤¤R ¤¤ ¤¤ ¤¤ ¤¤ ¤¤

R R R

R R R R R

¤R ¤R

Table 2-1-5a

5. Disassembling procedure table

The following table indicates the order in which parts are removed for replacement. To replace parts, remove them in the order of 1 to 18 as shown in the table. To install them, reverse the removal sequence. The symbols and numbers preceding the individual part names represent the numbers in the “Location of major mechanical parts” table. Also, the “T”, “B”, and “T/B” on the right of each part name shows that the particular part is removed from the front, from the back, and from both sides of the mechanism, respectively.

2-4

R4 R1 R3 T 9 T1 2 T11 B15 B12 B14 B13 B17 B21 B 7 B8 B5 B4 B11 T14 T15 T13 T22 T24 T18 B19

Symbols and numbers

Removal parts

(Reference items) Replacement parts

Symbols and numbers

2.2.3 Guide rail T 1

2.2.3 Roller cam assembly T 1

2.2.3 Cassette housing bracket T 1

2.2.3 Opener guide T 2

2.2.3 Door opener T 3

2.2.3 Relay gear T 3

2.2.3 Limit gear T 3

2.2.3 Cassette holder assembly T 6

2.2.3 Drive gear T 4

2.2.3 Drive arm T 8

2.2.4 Pinch roller arm assembly T 1

T12

2.2.5 Guide arm assembly T 1

T11

2.2.5 Press lever assembly T 3

2.2.6 A/C head T 1

2.2.7 Loading motor T 1

2.2.8 Capstan motor T/B 1

2.2.9 UV catcher2 T 1

T17

Pole base assembly (take-up side)

2.2.9

T25

2.2.9

Pole base assembly (supply side)

B15

2.2.10 Rotary encoder B 1

B12

2.2.11 Clutch unit B 1

B14

2.2.12 Change lever assembly B 3

B13

2.2.12 Direct gear B 4

2.2.12 Coupling gear B 5

2.2.12 Clutch gear B 6

B17

2.2.13 Link lever B 1

2.2.14 Cassette gear B 2

B18

B20

2.2.14 Control cam B 2

B21

2.2.14 Worm gear B 1

T10

- Lid guide T/B 5

2.2.15 Control bracket1 B 1

2.2.15 Control plate B 6

2.2.16 Loading arm gear (supply side) B 7

Loading arm gear (take-up side)

2.2.16

2.2.16 Loading arm gear shaft B 9

2.2.17 Take-up lever T/B 7

B11

B10

2.2.17 Take-up head T/B 8

2.2.17 Control plate guide T/B 8

2.2.18 Capstan brake assembly T/B 7

T14

Sub brake assembly(take-up side)

2.2.19

T15

Main brake assembly(take-up side)

2.2.20

T19

2.2.20

Main brake assembly(supply side)

T13

2.2.20 Reel disk (take-up side) T/B 16

T22

2.2.21 Tension brake assembly T/B 9

T20

2.2.21 Reel disk (supply side) T/B 10

T24

2.2.21 Tension arm assembly T/B 10

2.2.21 Tension arm bearing T/B 10

T18

2.2.22 Idler lever T/B 17

T16

2.2.22 Idler arm assembly T/B 18

B19

- Brake lever (

B16

- Rotary encoder guide T/B 19

) T/B 18

L1L1L2

Number of removal steps

Guide rail

Roller cam assembly

Cassette housing bracket

Opener guide

Front (T)/Back (B) of mechanism

1 2 3 4 5

T/B 2

T/B 15

1 2 3 4

T/B 16

1 2 3 4 5 6 7 8

T/B 9

1 2 3 4 5 6 7 8

1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8

1 2 3 4 5 6 7 8

1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8

1 2 3 4 5 6 7 8

Relay gear

112 12

12 3

4 5

5 6

6 7

Cassette holder assembly

Drive gear

Table 2-1-5b

Note:

• The parts with marked ( nisms (standard type or high-speed FF/REW type).

1 : Uses the standard type mechanism only.

2 : Uses the high-speed FF/REW type mechanism only.

) have different types of mecha-

Drive arm

Pinch roller arm assembly

Guide arm assembly

Press lever assembly

UV catcher2

Rotary encoder

Clutch unit

Change lever assembly

Direct gear

Coupling gear

Link lever

Worm gear

Control bracket1

Control plate

Loading arm gear (supply side)

Loading arm gear (take-up side)

1 2 3 4 5

3 4

1 2 3 4

1 2 3 4 5

1 2 3 4 5 6 1 2 3 4 5 6 7 1 2 3 4 5 6

1 2 3 4 5 6 1 2 3 4 5 6 1 2 3 4 5 6

9 10 11 12 13 14

9 10 11 12 13 14 15

9 10 11 12 13 14 15 16

9 10 11 12 13 14 15 16 17 9 10 11 12 13 14 15 16 17

9 10 11 12 13 14 15 16 17 18

) 1

(

Take-up lever

Sub brake assembly (take-up side)

Main brake assembly (take-up side)

Reel disk (take-up side)

Tension brake assembly

Tension arm assembly

Idler lever

Brake lever

7 7

2-5

2.2 Replacement of major parts

2.2.1 Before starting disassembling (Phase matching between mechanical parts)

The mechanism of this unit is closely linked with the rotary encoder and system controller circuits. Since the system controller detects the status of mechanical operation in response to phases of the rotary encoder (internal switch positions), the mechanism may not operate properly unless such parts as the rotary encoder, control plate, loading arm gear, control cam, cassette gear, limit gear, relay gear and drive gear are installed in their correct positions. Especially, this model is not provided with any cassette housing assembly, so that cassette loading and unloading must be accomplished by operation of the cassette holder assembly. The latter is in turn driven by such parts as the drive gear, relay gear and limit gear. Exercise enough care, therefore, to have the phases of all this gear matching one another. (For information on phase matching of the mechanism, see the instructions on how to install individual parts.) This unit is provided with a mechanism assembly mode. It is therefore necessary to enter this mode for assembling and disassembling procedures. This mode is usually not in use, manually set it when it is required.

2.2.3 Cassette holder assembly

1. How to remove

(1) Remove the guide rail and roller cam assembly. (See

Fig.2-2-3a.) (3 lugs on the guide rail and one lug on the roller cam assembly)

Guide rail

Lugs

Roller cam assembly

Lug

Fig. 2-2-3a

(2) Remove the two slit washers and remove the cassette

housing bracket. (See Fig.2-2-3b.)

(3) Remove the opener guide, spring(A), door opener, relay

gear and limit gear. (See Fig.2-2-3b.)

2.2.2 How to set the “Mechanism assembling mode”

Remove the mechanism assembly and place it bottom side up. (See SECTION 1 DISASSEMBLY.) Turn the worm gear toward the front so that the guide hole of the control cam is brought into alignment with the hole at the mechanism assembly chassis. This position renders the mechanism assembling mode operational. Make sure that the control plate is located in alignment with the mark E. (See Fig.2-2-2a.)

Worm gear

Chassis hole

Guide hole

Control cam

Limit gear

Spring(A)

Opener guide

Relay gear

Door opener

Cassette housing bracket

Slit washers

Fig. 2-2-3b

(4) While swinging the lock levers (R) and (L) of the cassette

holder assembly toward the front, slide the cassette holder assembly until its legs come to where the guide rail and the roller cam assembly have been removed (so that the drive arm is upright). (See Fig.2-2-3c.)

Lock lever (L)

Cassette holder assembly

Drive arm

(Upright)

Mark E

Control plate

Fig. 2-2-2a

Fig. 2-2-3c

Legs

2-6

While holding the left side of the cassette holder, lift the

(5)

cassette holder assembly so that the three legs on the left side are all released. Then pull the legs (A) and (B) on the right side out of the rail and also pull up the leg(C). (See Fig.2-2-3d and Fig.2-2-3e.)

(6) Draw out the drive gear, and remove the drive arm.

Cassette holder assembly

Fig. 2-2-3d

Cassette holder assembly

(A)

2. How to install (Phase matching)

(1) Insert the section (A) of the drive arm into the section (B)

of the main deck.

(2) Insert the section (1) of the drive gear into the round hole,

and the section (2) into the square hole on the drive arm. (See Fig.2-2-3f.)

(3) Hold the drive arm upright and fit the leg (C) on the right

side of the cassette holder assembly into the groove. (See Fig.2-2-3g.)

(4) While swinging the lock lever (R) of the cassette holder

assembly toward the front, put the legs (A) and (B) into the rail. (See Fig.2-2-3g.)

(5) Drop the three legs on the left side of the cassette holder

assembly into the groove at one time. (See Fig.2-2-3h.)

(6) Slide the whole cassette holder assembly toward the front

to bring it to the eject end position.

(7) Install the limit gear so that the notch on the outer cir-

cumference of the limit gear is brought into alignment with the guide hole on the main deck. (See Fig.2-2-3i.)

(8) Install so that the notch on the periphery of the relay gear

is aligned with the notch of the main deck and that hole A of the relay gear is aligned with the hole A of the limit gear and that hole B of the relay gear is aligned with the hole B of the drive gear. (See Fig.2-2-3i.)

(9) Install the door opener, opener guide, spring(A) and cas-

sette housing bracket and fasten the two slit washers.

Cassette holder assembly

Fig. 2-2-3e

Main deck right side

Drive arm

Hole

(C)

Lock lever (R)

(A)

(B)

Drive arm

(C)

Fig. 2-2-3g

Cassette holder assembly

Hole

Drive gear

(1)

(2)

(A)

2-7

Fig. 2-2-3f

(B)

Fig. 2-2-3h

Relay gear

Guide holeNotches Notch

2.2.6 A/C head

1. How to remove

(1) Remove the two screws (A) and remove the A/C head

together with the head base.

(2) When replacing only the A/C head, remove the three

screws (B) while controlling the compression spring.

Head base

Drive gear Limit gear

Fig. 2-2-3i

2.2.4 Pinch roller arm assembly

1. How to remove

(1) Remove the spring from the hook of the press lever as-

sembly.

(2) Remove the slit washer and remove the pinch roller seat

2. (See Fig.2-2-4a.)

(3) Remove the pinch roller arm assembly by pulling it up.

Slit washer

Pinch roller seat2

Spring

Pinch roller arm

Press lever assembly

Pinch roller arm assembly

assembly

Fig. 2-2-4a

2.2.5 Guide arm assembly and press lever assembly

1. How to remove

(1) Remove the spring and expand the lug of the lid guide in

the arrow-indicated direction. Then remove the guide arm assembly by pulling it up.

(2) Remove the press lever assembly by pulling it up. (See

Fig.2-2-5a.)

Screws(A)

A/C head

Fig. 2-2-6a

Screws(B)

A/C head

Compression

A/C head board assembly

Head base

springs

Fig. 2-2-6b

2. How to install

(1) To make the post-installation adjustment easier, set the

temporary level as indicated in Fig.2-2-6c. Also make sure that the screw center (centre) is brought into alignment with the center (centre) position of the slot.

A/C head

12.4 mm

Head base

Screw

Tension spring

LugLid guide

Fig. 2-2-5a

Press lever assembly

Guide arm assembly

Head base

A/C head

Fig. 2-2-6c

2.2.7 Loading motor

1. How to remove

(1) Remove the belt wound around the worm gear. (2) Open the two lugs of the motor guide and remove the

loading motor, loading motor board assembly and motor guide altogether by pulling them up.

(3) When replacing the loading motor board assembly, take

care with the orientation of the loading motor. (Install so that the loading motor label faces upward.)

(4) When the motor pulley has been replaced, choose the

fitting dimension as indicated in Fig.2-2-7a.

2-8

Loading motor board assembly

Loading motor

Lugs

Motor guide

6.5 ± 0.2 mm

LABEL

Motor pulley

Worm gear

Belt

Fig. 2-2-7a

2.2.8 Capstan motor

1. How to remove

(1) Remove the belt (capstan) on the mechanism assembly

back side.

(2) Remove the three screws (A) and remove the capstan

motor.

Screws(A)

Screw(A)

Capstan motor

Belt

Fig. 2-2-8a

Spacer

2. How to install (Centering the mounting position)

When the capstan motor has once been removed and then reinstalled out of the initial correct position in the rotational direction, the capstan motor current may be unstable during operation in high or low temperatures. This may result in greater Wow & Flutter and occasionally in power breakdown because of current over - load. Install the capstan motor while following the procedure given below. (The capstan motor is centrally located when the unit is shipped from the factory.)

(1) Provisionally tighten the three screws (A) securing the

capstan motor.

(2) Install the mechanism assembly to which the capstan

motor is provisionally fastened on the bottom chassis which incorporates the Main board assembly. (No need to tighten the screws for mounting the mechanism.) Make sure that all the connectors for the mechanism assembly and the Main board assembly are correctly installed as indicated in Fig. 2-2-8b.

(3) Making sure that the connector for the capstan motor is

correctly mounted, and securely tighten the three screws (A).

Note:

• When the capstan motor has been replaced with a new one, perform recording in the EP(or LP) mode for at least 2 minutes at normal temperatures immediately before starting the FF/REW or SEARCH operations (Aging).

2.2.9 Pole base assembly (supply or take-up side)

1. How to remove

(1) Remove the UV catcher 2 on the removal side by loos-

ening the screw (A).

(2) Remove the pole base assembly on the supply side from

the mechanism assembly by loosening the screw (B) on the mechanism assembly back side and sliding the pole base assembly toward the UV catcher 2.

(3) As for the pole base assembly on the take-up side, turn

the pulley of the loading motor to lower the cassette holder because the screw (B) is hidden under the control plate. (See the “Procedures for Lowering the Cassette holder assembly” of 1.3 DISASSEMBLY/ASSEMBLY METHOD.) Further turn the motor pulley to move the cassette holder until the screw (B) is no longer under the control plate (in the half-loading position). Then remove it as done for the supply side by removing the screw (B).

Note:

• After reinstalling the Pole base assembly and the UV catcher2, be sure to perform compatibility adjustment.

2-9

Fig. 2-2-8b

Connector for the capstan motor

Screw(A)

UV catcher2

Screw(A)

UV catcher2

Screw(B)

Fig. 2-2-9a

+ 76 hidden pages