JVC HR-XV48EF, HR-XV48EK, HR-XV48EL, HR-XV48ER, HR-XV48EX Service Manual

...

SERVICE MANUAL

DVD PLAYER & VIDEO CASSETTE RECORDER

YD05120052

HR-XV48EF,HR-XV48EK, HR-XV48EL,HR-XV48ER, HR-XV48EX,HR-XV48EY,

HR-XV48EZ

(EK model)

(EL, EX, EY, EZ models)

(EF, ER models)

(EF model)

HR-XV48EF,HR-XV48EK,HR-XV48EL,HR-XV48ER,HR-XV48EX,HR-XV48EY,HR-XV48EZ [D4PV1]

For disassembling and assembling of MECHANISM ASSEMBLY, refer to the SERVICE MANUAL No.86700(MECHANISM ASSEMBLY).

TABLE OF CONTENTS

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

2 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8

3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11

4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-17

5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-25

No.YD051

2005/2

SPECIFICATION

GENERAL

Power requirement AC 220V - 240V, 50 Hz/60 Hz

Power consumption

Temperature

Dimensions (W × H × D) 435 mm × 93 mm × 272 mm

Tape speed

Maximum recording time

VIDEO/AUDIO (VHS deck)

Signal-to-noise ratio 45 dB

Horizontal resolution 240 lines (VHS-SECAM, SP/LP)

VIDEO/AUDIO (DVD deck)

Frequency response DVD:4 Hz - 22 KHz, CD:4 Hz - 20 KHz

Output

TUNER/TIMER(VHS deck)

TV channel storage capacity 99 positions (+AUX position)

Channel coverage(SECAM-L) VHF(LOW) : 49MHz-65MHz(2-4)

Channel coverage(PAL) VHF(LOW) : 47MHz-89MHz(E2-E4,X,Y,Z)

Memory backup time Approx. 10 min.

ACCESSORIES

Provided accessories RF cable, Infrared remote control unit, "R6"

Specifications shown are for SP mode unless otherwise specified. E.& O.E. Design and specifications subject to change without notice. Manufactured under license from Dolby Laboratories. "Dolby" and the double-D symbol are trademarks of Dolby Laboratories. "DTS"and "DTS 2.0+ Digital Out" are trademarks of Digital Theater Systems, Inc.

SHOWVIEW is a trademark of Gemstar Development Corporation. The SHOWVIEW system is manufactured under licence from Gemstar Development Corporation.(EF/ EL/ER/EX/EY/EZ MODELS)

VIDEO Plus+ and PlusCode are registered trademarks of Gemstar Development Corporation. The VIDEO Plus+ system is manufactured under license from Gemstar Development Corporation.(EK MODEL)

"Official DivX Certified(TM) product" "Plays DivX(R)5, DivX(R)4, DivX(R)3, and DivX(R)VOD video content (in compliance with DivX Certified(TM) technical requirements)"

"DivX, DivX Certified, and associated logos are trademarks of DivXNetworks, Inc. and are used under license."

Power on 23 W Power off 4.0 W

Operating 5°C to 40°C

Storage -20°C to 60°C

Operating position Horizontal only

Weight 4.2 Kg Format VHS PAL/SECAM standard VHS PAL standard

Tape width 12.65 mm

(SP) 23,39 mm/s

(LP) 11,70 mm/s

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

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

Signal system PAL/SECAM-type colour signal and CCIR

Recording system DA4 (Double Azimuth) head helical scan system

Frequency range 70 Hz to 10,000 Hz (Normal audio) 20 Hz to 20,000 Hz (Hi-Fi audio)

Input/Output 21-pin SCART connectors: IN/OUT × 1, IN/DECODER × 1

Signal system PAL

Applicable disc DVD VIDEO, DVD-R (Video format), DVD-RW (Video format), Video CD, SVCD, Audio CD (CD-DA),

S/N Ratio 90 dB

Wow and flutter Below Measurable Level

Dynamic range 90 dB

Audio (RCA) 2 Vrms, 1 KΩ

Digital Audio -21 dBm to -15 dBm(peak)

Tuning system Frequency synthesized tuner

Aerial output - UHF channels 22 - 69 (Adjustable)

monochrome signal, 625 lines/50 fields

VHF(HIGH) : 104MHz-300 MHz(5-10,CATV)

Hyper : 300MHz-470MHz(CATV)

VHF(HIGH) : 104MHz-300MHz(E5-E12,S1-

Hyper : 302MHz-470MHz(S21-S41)

UHF : 470MHz-862MHz(E21-E69)

HR-XV48EF HR-XV48EK HR-XV48EL/ER/EX/EY/EZ

PAL-type colour signal and CCIR monochrome signal, 625 lines/50 fields

250 lines (VHS-PAL, SP/LP)

UHF : 470MHz-862MHz(21-69)

S20,M1-M10,U1-U10)

battery × 2, PERI cable

RCA connectors: VIDEO IN × 1, AUDIO IN x 1, AUDIO OUT × 1

CD-R/RW (CD-DA, Video CD, SVCD, MP3 format, JPEG, DivX)

VHF 44.5 MHz - 143 MHz/143

UHF 470 MHz - 862 MHz

RF cable, Infrared remote control unit, "R6" battery x 2

250 lines

VHF 47 MHz - 89 MHz/104 MHz - 300 MHz/

302 MHz - 470 MHz

UHF 470 MHz - 862 MHz

1-2 (No.YD051)

SECTION 1

PRECAUTION

1.1 SAFTY 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.

1.1.1 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 comply 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:

• Wires covered with PVC tubing

• Double insulated wires

• High voltage leads

(5) Use specified insulating materials for hazardous live parts.

Note especially:

• Insulation Tape

• PVC tubing

•Spacers

• Insulation sheets for transistors

•Barrier

(6) When replacing AC primary side components (transformers,

power cords, noise blocking capacitors, etc.) wrap ends of wires securely about the terminals before soldering.

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.

(12) Crimp type wire connectorIn such cases as when replacing

the power transformer in sets where the connections between the power cord and power trans former 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.

• Connector part number :E03830-001

• Required tool : Connector crimping tool of the proper type which will not damage insulated parts.

• Replacement procedure

a) 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.1-1-3

b) 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.1-1-4

c) Align the lengths of the wires to be connected. In-

sert the wires fully into the connector.

Metal sleeve

Fig.1-1-1

(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.1-1-2 (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.

Connector

Fig.1-1-5

d) As shown in Fig.1-1-6, 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.

1.2 5

5.5

Crimping tool

Fig.1-1-6

e) Check the four points noted in Fig.1-1-7.

Not easily pulled free

Wire insulation recessed

more than 4 mm

Crimped at approx. cente

of metal sleev

Conductors extended

Fig.1-1-7

(No.YD051)1-3

1.1.2 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 Fig.1-1-11 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 Fig.1-1-11 below.

Chassis

Power cord primary wire

Fig.1-1-8

(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 Fig.1-1-9 and following Fig.1-1-12.

Externally exposed accessible part

Fig.1-1-9

(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 Fig.1-1-10 and grounding specifications.

AC inlet

Earth pin

Exposed accessible part

MIlli ohm meter

Grounding Specifications

Region

USA & Canada

Europe & Australia

Grounding Impedance (Z

Z 0.1 ohm

Z 0.5 ohm

)

Fig.1-1-10

AC Line Voltage

100 V

100 to 240 V

110 to 130 V

200 to 240 V

Region

Japan

USA & Canada

Europe & Australia

Insulation Resistance (R

R 1 M /500 V DC

1 M R 12 M /500 V DC

R 10 M /500 V DC

)

Dielectric Strength

AC 1 kV 1 minute

AC 1.5 kV 1 minute

AC 1 kV 1 minute AC 3 kV 1 minute

AC 1.5 kV 1 minute

(

Class

(

Class

Clearance Distance (d), (d'

d, d' 3 mm

d, d' 4 mm

d, d' 3.2 mm

d 4 m m

)

d' 8 m m (Power cord d' 6 m m (Primary wire

)

Fig.1-1-11

AC Line Voltage

100 V

110 to 130 V

220 to 240 V

Region

Japan

USA & Canada

Europe & Australia

Load Z

0.15

1.5

Leakage Current (i)

i 1 mA rms

i 0.5 mA rms

i 0.7 mA peak i 2 mA dc

a, b, c

Exposed accessible parts

Antenna earth terminals

Other terminals

Fig.1-1-12

NOTE :

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

)

1-4 (No.YD051)

1.2 Preventing static electricity

Electrostatic discharge (ESD), which occurs when static electricity stored in the body, fabric, etc. is discharged, can destroy the laser diode in the traverse unit (optical pickup). Take care to prevent this when performing repairs.

1.2.1 Grounding to prevent damage by static electricity

Static electricity in the work area can destroy the optical pickup (laser diode) in devices such as DVD players. Be careful to use proper grounding in the area where repairs are being performed.

(1) Ground the workbench

Ground the workbench by laying conductive material (such as a conductive sheet) or an iron plate over it before placing the traverse unit (optical pickup) on it.

(2) Ground yourself

Use an anti-static wrist strap to release any static electricity built up in your body.

(3) Handling the optical pickup

• In order to maintain quality during transport and before installation, both sides of the laser diode on the replacement optical pickup are shorted. After replacement, return the shorted parts to their original condition. (Refer to the text.)

• Do not use a tester to check the condition of the laser diode in the optical pickup. The tester's internal power source can easily destroy the laser diode.

(No.YD051)1-5

1.3 Important for laser products

(1) CLASS 1 LASER PRODUCT (2) DANGER : Invisible laser radiation when open and inter

lock failed or defeated. Avoid direct exposure to beam.

(3) CAUTION : There are no serviceable parts inside the

Laser Unit. Do not disassemble the Laser Unit. Replace the complete Laser Unit if it malfunctions.

(4) CAUTION : The compact disc player uses invisible laser

radiation and is equipped with safety switches which prevent emission of radiation when the drawer is open and the safety interlocks have failed or are de feated. It is dangerous to defeat the safety switches.

VARNING

Osynlig laserstrålning är denna del är öppnad och spårren är urkopplad. Betrakta ej strålen.

VARO

Avattaessa ja suojalukitus ohitettaessa olet alttiina näkymättömälle lasersäteilylle. Älä katso säteeseen.

ADVARSEL

Usynlig laserstråling ved åbning, når sikkerhedsafbrydere er ude af funktion. Undgå udsasttelse for stråling.

ADVARSEL

Usynlig laserstråling ved åpning, når sikkerhetsbryteren er avslott. unngå utsettelse for stråling.

REPRODUCTION AND POSITION OF LABEL and PRINT

WARNING LABEL

(5) CAUTION : If safety switches malfunction, the laser is able

to function.

(6) CAUTION : Use of controls, adjustments or performance of

procedures other than those specified herein may result in hazardous radiation exposure.

CAUTION Please use enough caution not to see the beam directly or touch it in case of anadjustment or operation check.

CN7103

A/C HEAD

CN2001

CN5001

1-6 (No.YD051)

1.4 Precautions for Service

1.4.1 Handling of Traverse Unit and Laser Pickup

(1) Do not touch any peripheral element of the pickup or the actuator. (2) The traverse unit and the pickup are precision devices and therefore must not be subjected to strong shock. (3) Do not use a tester to examine the laser diode. (The diode can easily be destroyed by the internal power supply of the tester.) (4) To replace the traverse unit, pull out the metal short pin for protection from charging. (5) When replacing the pickup, after mounting a new pickup, remove the solder on the short land which is provided at the center of

the flexible wire to open the circuit.

(6) Half-fixed resistors for laser power adjustment are adjusted in pairs at shipment to match the characteristics of the optical block.

Do not change the setting of these half-fixed resistors for laser power adjustment.

1.4.2 Destruction of Traverse Unit and Laser Pickup by Static Electricity

Laser diodes are easily destroyed by static electricity charged on clothingor the human body. Before repairing peripheral elements of the traverse unit or pickup, be sure to take the following electrostatic protection:

(1) Wear an antistatic wrist wrap. (2) With a conductive sheet or a steel plate on the workbench on which the traverse unit or the pick up is to be repaired, ground the

sheet or the plate. (3) It solders to two short circuit sections on the substrate of a pick-up. (4) After removing the flexible wire from the connector (CN101

), short-circuit the flexible wire by the metal clip.

(5) Short-circuit the laser diode by soldering the land which is provided at the center of the flexible wire for the pickup.

After completing the repair, remove the solder to open the circuit.

Gear1

Short circuit

Pick-up

* Please refer to the SECTION3 DISASSEMBLY method for details.

CN101

DVD SERVO CONTROL BOARD

(No.YD051)1-7

SECTION 2

SPECIFIC SERVICE INSTRUCTIONS

2.1 Different table of feature

The following table indicates main different points between models HR-XV48EF, HR-XV48EK, HR-XV48ER and HR-XV48EL/EX/EY/ EZ.

HR-XV48EF HR-XV48EK HR-XV48ER HR-XV48EL/EX/EY/EZ

POWER PLUG CEE 3PIN CEE ← SCART CABLE PROVIDED OPTIONAL ←←

VHS PAL/MESECAM/SECAM/ NTSC

BROADCASTING STANDARD L,L',B/G I B/G,D/K ← STEREO DECODER NICAM(L,B/G)/A2(B/G) NICAM NICAM/A2 ←

RF OUT CH/RF OUT SYSTEM [INITIAL]

VCR PLUS+ SHOWVIEW VIDEOPLUS+ SHOWVIEW ← VPS/PDC NOT USED ← USED ←

OSD LANGUAGES VCR:FRENCH

REGIONAL CODE REGIONAL CODE: 2 ← REGIONAL CODE: 5 REGIONAL CODE: 2

PB on PAL TV with HiFi

NOT USED 22-69CH,OFF[AUTO]/I 22-69CH,OFF[AUTO]/G,K ←

DVD:ENGLISH/FRENCH/GER-

MANY

NOTE :

Mark ← is same as left.

PAL/NTSC PB on PAL TV with

DVD:ENGLISH/FRENCH/GER-

HiFi

VCR:ENGLISH

MANY

PAL/MESECAM/NTSC PB on

PAL TV with HiFi

VCR: 13 LANGUAGES

DVD:ENGLISH/FRENCH/GER-

MANY

PAL/MESECAM(MANUAL)/

NTSC PB on PAL TV with HiFi

←

1-8 (No.YD051)

2.2 Service position

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

2.2.1 How to set the "Service position"

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

sembly of the major parts before removing the Mechanism

assembly. (2) Remove the screws that fix the Mechanism, Regulator

board assembly to the bottom chassis. If any other screws

are used to fix the boards, remove them also. (3) Remove the combined Mechanism,Regulator borad and

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

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

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

proceed with the diagnostics and servicing of the board as-

sembly.

Notes:

• Before inserting the power cord plug into the power out-

let, make sure that none of the electrical parts are able to short-circuit between the workbench and the board assembly.

• For the disassembly procedure of the major parts and

details of the precautions to be taken, see "Removing the major parts".

• If there are wire connections from the Main board and

Mechanism assemblies to the other major parts, be sure to remove them (including wires connected to the major parts) first before performing step (2).

• When carrying out diagnosis and repair of the Main

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

• In order to diagnose the playback or recording of the

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

• For some models, the mechanism and board assem-

blies are attached by connectors only. When carrying out a diagnosis or repair of the boards in the "Service position", make sure that the connectors are not disconnected.

SWITCHING REGULATOR board assembly

DVD PLAYER UNIT

DISPLAY /OPERATION board assembly

TP111 D.FF TP4001 CTL.P TP106 PB FM TP2253 A.PB FM

TERMINAL board assembly

SWITCH / JACK board assembly

MAIN board assembly

Fig.2-2a

2.3 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.

Note:

• Confirm the RCU mode when exchanged parts. Since

some SERVICE PARTS sets the VCR to the Jig RCU mode as initial setting. Therefore please set the VCR to the user RCU mode after replacing the EEPROM.

User RCU mode

Jig RCU mode

( not displayed)

Fig.2-3a User/Jig RCU mode

2.3.1 Setting the Jig RCU mode

(1) Turn on the power.

(2) Press the following remocon keys continuously within 2

seconds " SET UP " → " 2 " → " 8 " → " ENTER ". When the VCR is set to the Jig RCU mode, the symbols ( " : " ) in the time display of the FDP are turned off. (Refer to Fig.2-3a)

(No.YD051)1-9

2.3.2 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 "43-80" from the Jig RCU.

2.4 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".

2.4.1 How to set the "Mechanism service mode"

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

codes from the Jig RCU can be received) (2) Transmit the code "43-E5" from the Jig RCU. (3) Release the lug of the Cassette holder and then slide the

Cassette holder toward the direction where the Cassette

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

completed, the mechanism enters the desired mode.

When the VCR is set to the Mechanism service mode, the

symbols ("Timer") in the FDP (LED) are blinked.

2.4.2 How to exit from the "Mechanism service mode"

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

2.5 Maintenance and inspection

2.5.1 Cleaning

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

Note:

• Absolutely avoid sweeping the upper drum vertically as

this will cause damage to the video head.

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

soak a piece of closely woven cloth with alcohol and while

holding the cloth onto the upper drum by the fingers, turn

the upper drum counterclockwise. (2) To clean the parts of the tape transport system other than

the upper drum, use a piece of closely woven cloth or a cot-

ton swab soaked with alcohol. (3) After cleaning, make sure that the cleaned parts are com-

pletely dry before using the cassette tape.

2.5.2 Lubrication

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

Note:

• See the "mechanism assembly" diagram of the "parts

list" for the lubricating or greasing spots, and for the types of oil or grease to be used.

2.5.3 Suggested servicing schedule for main components

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

System Parts name

Operation hours

1000H 2000H Drum assembly C,X X A/C head C,X C,X Pinch roller arm assembly C C

Tape transport

Full erase head C C Tension arm assembly C C Capstan motor (Shaft) C C Guide arm assembly C C Capstan motor X Capstan brake assembly X Main brake assembly X

Drive

Belt (Capstan) X X Loading motor X Clutch unit X Worm gear X Control plate X

Other Rotary encoder X

C : Cleaning X : Inspection or Replacement if necessary

1-10 (No.YD051)

A/C head

Video heads

Fig.2-6a

+ 21 hidden pages