JVC HRXV-48 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

COPYRIGHT © 2005 VICTOR COMPANY OF JAPAN, LIMITED

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

r

e

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

2

.0

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.

d

Chassis

d'

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.

ab

Externally
exposed
accessible part

Z

V

c

A

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

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

110 to 130 V

220 to 240 V

Region

Japan

USA & Canada

Europe & Australia

Load Z

1

0.15

1.5

2

50

Leakage Current (i)

i 1 mA rms

i 0.5 mA rms

i 0.7 mA peak
i 2 mA dc

i 0.7 mA peak
i 2 mA dc

a, b, c

Exposed accessible parts

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

SECTION 3

DISASSEMBLY

3.1 Removing the major parts

3.1.1 Destination of connectors

Two kinds of double-arrows in connection tables respectively

show kinds of connector/wires.

: The connector of the side to remove

CONN. No. PIN No.CONNECTOR

WR2a

WR2b

Main CN101

Main CN103

 Destination of connectors

CONN. No. PIN No.CONNECTOR

WR2a

WR2b

WR3a

WR3b

WR4a

WR4b

WR4c Main

WR6a

Main

Main

Main

Drum
assembly

Main

Main

SW
Regulator

3.1.2 How to read the procedure table

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

Step/

Loc No.

[1] Top cover 3-1a

Part Name

Bracket 2(S1c)

: Wire: Flat wire : Board to board (B-B)

Digital CN761

Digital CN762

CN7104

CN3102

CN2001

CN7301

CN7302

CN8301

CN5301

Switch/Jack

Display/operation

A/C head

Main

DVD
servo control

DVD
servo control

Switch

Main

Fig.
No.

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

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

CN7191

CN7003

CN1

CN302

CN301

CN1

CN5401

Point Note

40

10

10

22

6

9

19

17

5

11

3.1.3 Disassembly procedure

Step/

Loc No.

[1]
[2]

[3]

[4]

[5]
[6]

[7]

Part Name

Top cover
Front panel assembly
(Display/operation board
assembly)
(Switch/Jack board
assembly)
Mechanism assembly

(Drum assembly)

DVD unit
(Bracket)

Rear cover
Switching regulator board
assembly
Main board assembly

Fig.
No.

3-1d

8(S1a)

3-1a

4(L2a),5(L2b),(S2a)

3-1d

CN7104(WR2a),
CN3102(WR2b),

3-1b

CN2001(WR3a)

3-1c

3(S3a),(S3b)

3-1d

CN(WR3b)
(S3c),(S3d),(S3e)

3-1d

3(S4a),3(S4c),
WR4a(CN7301),
WR4b(CN7302),
WR4c(CN8301)

3-1d

7(S5a),5(L5a)

3-1d

3(S6a)
CN5301(WR6a)

3-1d

2(S7a)

Point Note

<Note 2a>
<Note 2b>

<Note 2a>
<Note 3a>
<Note 3b>
<Note 3c>

<Note 2a>

< Note 2a >

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

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

< Note 2b >

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

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

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

(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 (loca-

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

released, unplugged, unclamped or unsoldered.

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

Solder, CN**(WR**)= Remove the wire (WR**) from the

connector (CN**).

Note:

• The bracketed ( ) WR of the connector symbol are

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

(5) Adjustment information for installation

Door
opener

Side
frame(R)

Switch
knob

Switch
lever

Fig.3-1a

< Note 3a >

• When reattaching the Mechanism assembly, secure the
screws (S3a to S3b) in the order of 1,2,3.

< Note 3b >

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

• When reattaching the Mechanism assembly, set the “Mecha­nism assembling mode”. [See “MECHANISM ASSEMBLY
SERVICE MANUAL (No. 86700)”.]

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

(No.YD051)1-11

< Note 3c >

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

(S3d)

Mechanism
assembly

(S3c)

(S3e)

(S3d)

(S3e)

Drum
assembly

<Note 3c>

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

(S3c)

HOOK

Fig.3-1b

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

Shaft

Motor

Video heads

Fig.3-1c

1-12 (No.YD051)

(S1a)

[1]Top cover

(S1a)

(S1a)

[3]Mechanism assembly

(S3a)

<Note 3a>

[7]Main board assembly

JS3001

<Phase alignment>
.

Accord the position of V gap

on R.ENCORDER and PWB silk
.

Accord the position of Boss

(S7a)

on R.ENCORDER and PWB silk

[2]Front panel assembly

3

(S3c)

<Note3c>

j

(L2a)

(S3a)

<Note 3a>

1

g

j

g

(S3e)

<Note 3c>

[3]Drum assembly

f

e

(S3d)

<Note 3c>

g

JS3001

c

(S1a)

(S3a)

<Note 3a>

[5]Rear cover

2

g

(S3b)

<Note 3a>

(L5a)

(S7a)

Terminal board assembly

g

[4]Bracket

(S1a)

(S4b)

(S6a)

(S1a)

(L5a)

(S4b)

(S5a)

(S5a)

(L6a)

(S5a)

(S5a)

(L5a)

(L5a)

(S4a)

(S4a)

L

P

*****

(S4b)

(S6a)

CN5001

Bracket board assembly

[4]DVD unit

(S4a)

(L2b)

Cassette door

<Note 2b>

CN7191

(WR2b)

<Note 2a>

CN7003

(WR2a)

<Note 2a>

Switch/jack board assembly

(L2b)

BOTTOM SIDE

Display/Operation board assembly

TOP SIDE

(L2a)

(L2b)

(S2a)

CN7104

Jack board assembly

Fig.3-1d

[6]Switching regulator board assembly

(WR3b)

<Note 2a>

Terminal board assembly

CN2001

(WR3a)

<Note 2a>

CN3102

CN7191

Main board
assembly

(WR4b)

<Note 2a>

CN301

CN7301

CN7302

CN8301

(WR4c)

<Note 2a>

Switching regulator
board assembly

CN5001

DVD UNIT

(WR4a)

<Note 2a>

CN5301

CN5401

CN302

(WR6a)

(No.YD051)1-13

3.2 Loading mechanism assembly

Projection of the tray

3.2.1 Removing the tray (See Figure 3-2a, Figure 3-2b, Figure 3-2c, Figure 3-2d, Figure 3-2e, Figure 3-2f)

(1) Push a of the slide cam on the hole in the right side of the

loading base by using a driver until it stops. (See Figure 3­2a.)

(2) The tray comes out. Pull the tray in a front direction until it

stops.

(3) Remove the two screws A attaching the slide bracket. (See

Figure 3-2b.)

(4) Tilt the tray in a direction of the arrow around the point in

the left rear part of the tray. (See Figure 3-2c.)

(5) The rail of the tray is removed from b of the loading base.

Then, remove the tray upward. (See Figure 3-2d.)

Attaching the tray:

Engage c of the loading base to the projection of the tray while
tilting the tray to the left. Turn the tray in a direction of the ar­row, and attach the slide bracket. (See Figure 3-2e.)

Note:

Prior to the procedure above, move the slide cam in a direction
of the arrow so that d of the slide cam can be inserted in e of
the tray. (See Figure 3-2f.)

Tray

The point in the left rear part

Fig.3-2c

Tray

Push

Slide cam part a

Slide bracket

A

Fig.3-2a

Fig.3-2b

A

Loading base

Tray

Loading base part b

Rail of the tray

Fig.3-2d

Projection of the tray

Loading base part c

Fig.3-2e

Part e

1-14 (No.YD051)

Part d

Slide cam

Fig.3-2f

3.2.2 Removing the traverse mechanism assembly (See Figure 3-2g)

f

Shaft

Reverse the loading mechanism assembly. Remove the four
screws B attaching the traverse mechanism assembly. Remove
the traverse mechanism assembly upward.

Loading mechanism assembly

3.2.3 Removing the elevator (See Figure 3-2h and Figure 3-2j)

• Prior to the following procedure, remove the traverse mecha­nism assembly.
(1) Remove the two arms of the elevator from the two parts f

by moving the arms in a direction of the arrow.

(2) Pull out the elevator in a rear direction.

Attaching the elevator:

Engage the two holes g to the two shafts on the front part of
the elevator. And then, attach the elevator.

B

B

B

B

Traverse mechanism assembly

Fig.3-2g

Elevator

Part f

Fig.3-2h

g

Slide cam

Elevator

Shaft

Fig.3-2j

(No.YD051)1-15

Part

g

3.2.4 Removing the loading motor (See Figure 3-2k and Figure 3-2l)

• Prior to the following procedure, remove the tray, the traverse
mechanism assembly, and the elevator.
(1) Remove the belt from the pulley.
(2) Remove two screws C attaching the loading motor.
(3) Remove two solders h on the switch board.

Switch board

Pulley

Part h

Belt

Pulley

C

Fig.3-2k

Loading base

Slide cam

C

Loading motor

3.3 Traverse mechanism assembly

3.3.1 Removing the pickup (See Figure 3-3a, Figure 3-3b)

• Prior to the following procedure, remove the traverse mecha­nism assembly.
(1) Remove one screw D attaching the plate.
(2) Remove the plate and the leaf spring.
(3) Lift i of the shaft 1, and pull out the shaft 1 from j.
(4) Remove k of the pickup from the shaft 2.

Attaching the pickup:

(1) Engage k of the pickup to the shaft 2.
(2) Insert the shaft 1 in j, and attach the shaft 1 to i.
(3) Attach the leaf spring, and then attach the plate. Fix the

leaf spring and the plate by using the screw D.

Fig.3-2l

spring

D

Thurust spring

Plate

Fig.3-3a

Shaft 2

Par t k

Par t j

1-16 (No.YD051)

spring

Shaft 1

Par t i

Fig.3-3b

SECTION 4

ADJUSTMENT

4.1 Before adjustment

4.1.1 Precaution

• The adjustments of this unit include the mechanism com-

patibility and electrical adjustments. During the perfor­mance of this work, be sure to observe the precautions for
each type of adjustment.

• If there is a reference to a signal input method in the signal

column of the adjustment chart, “Ext. S-input” means the
Y/C separated video signal and “Ext. input” means the
composite video signal input.

• Unless otherwise specified, all measuring points and

adjustment parts are located on the Main board.

4.1.2 Required test equipments

• Color (colour) television or monitor

• Oscilloscope: wide-band, dual-trace, triggered delayed sweep

• Signal generator: RF / IF sweep / marker

• Signal generator: stairstep, color (colour) bar [PAL]

• Recording tape

• Digit-key remote controller(provided)

4.1.3 Required adjustment tools

: Used --- : Not used

Mechanism

compatibility

adjustment

Roller driver
Jig RCU ---
Back tension cassette gauge ---
Alignment tape(MHPE) ---

Alignment tape(MHPE-L)

Alignment tape(MHP-L)

Roller driver

PTU94002

Jig RCU

PTU94023B

---

Back tension cassette gauge

Electrical

adjustment

---

PUJ48076-2

4.1.4 Color (colour) bar signal,Color (colour) bar pattern

Colour bar signal [PAL]

White(100%)

White(75%)

0.7 V

1V

0.3 V

Horizontal sync

Yellow

Cyan

Green

Magenta

Red

VU

V(R-Y)
U(B-Y)

Blue

Burst

Colour bar pattern [PAL]

(75%)

Cyan

White

Yellow

0.3 V

V

White

U Black

100%

Green

Magenta

Red

Blue

4.1.5 Switch settings

When adjusting this unit, set the VCR mode and switches
as described below.

• When using the Jig RCU, it is required to set the VCR to the
Jig RCU mode. (See "SECTION 2 SPECIFIC SERVICE IN­STRUCTIONS")

Jig RCU

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

CUSTOM CODE
43: A CODE

DATA CODE

INITIAL MODE

Fig.4-1a Jig RCU [PTU94023B]

• Set the switches as shown below unless otherwise specified
on the relevant adjustment chart. The switches that are not list­ed below can be set as desired.
If the VCR is not equipped with the functions detailed below,
setup is not required.

AUTO PICTURE/VIDEO CALIBRATION/
B.E.S.T./D.S.P.C.

PICTURE CONTROL/SMART PICTURE NORMAL/NATURAL
VIDEO STABILIZER OFF
TBC ON
Digital 3R ON
VIDEO NAVIGATION/TAPE MANAGER OFF
BLUE BACK OFF

OFF

Alignment tape

(SP, stairstep, PAL)

MHPE

CD-DA test disc

CTS-1000

Alignment tape

(LP, stairstep, PAL)

MHPE-L

DVD test disc

VT-501

4.1.6 Manual tracking mode (Auto tracking ON/OFF) set-

ting

(1) In order to set to the manual tracking mode during tape

playback, press the “TRACKING + and -” button at the
same time on the remote control unit.

• Each press of the button switches the auto tracking ON
or OFF.

• When the manual tracking mode is set, the tracking is
placed at the center position.

(2) Press “TRACKING +/-” to adjust the tracking manually.

(No.YD051)1-17

4.1.7 EVR Adjustment

Some of the electrical adjustments require the adjustment per­formed by the EVR system. The main unit have EEPROMs for
storing the EVR adjustment data and user setups.

Notes:

• In the EVR adjustment mode, the value is varied with the

channel buttons (+, -). The adjusted data is stored when
the setting mode changes (from PB to STOP, when the
tape speed is changed, etc.). Take care to identify the
current mode of each adjustment item when making an
adjustment.

4.2 Mechanism compatibility adjustment [VHS SECTION]

Notes:

• Although compatibility adjustment is very important, it

is not necessary to perform this as part of the normal
servicing work. It will be required when you have re­placed the A/C head, drum assembly or any part of the
tape transport system.

• To prevent damaging the alignment tape in the compatibil­ity adjustment, prepare a cassette tape (for self-recording/
playback), perform a test on it by transporting it and mak­ing sure that the tape is not bent by the tape transport
mechanisms such as in the guide rollers.(See Fig.4-2b.)

4.2.1 Tension pole position

Notes:

• This adjustment must be performed every time the ten-

sion band is replaced.

Signal (A) • Back tension cassette gauge [PUJ48076-2]

Mode (B1)

Adjustment part (F) • Adjust pin [Mechansim assembly]

Specified value (G) • 25 - 51 gfcm (2.45 - 5 x 10

(B2)

•PB

• Eject end

-

3

Nm)

(1) Play back the back tension cassette gauge (A).
(2) Check that the indicated value on the left side gauge is

within the specified value (G).

(3) If the indicated value is not within the specified value (G),

perform the adjustment in a following procedure.(See
Fig.4-2a.)

a) Remove the top frame, cassette holder and side

frames (L/R) all together. (refer to the SERVICE
MANUAL No.86700 [MECHANISM ASSEMBLY].)

b) Rotate the loading motor gear to move the control

plate so that the triangular stamping to the left of the
“P”stamping is aligned with the stamping (a) on the
main deck. This positioning is mode (B1).

c) Adjust by turning the adjustment pin so that the tip of

the tension arm is aligned with the stamping (b) on
the main deck.

d) Rotate the reel disk (S) by about one turn clockwise

and make sure that the round hole of the adjustment
pin is located in the “OK” range. If it is outside this

range, restart the adjustment from the beginning.
After completion of the adjustment, rotate the loading gear
motor to return it to the mode (B2) position.

1-18 (No.YD051)

TENSION ARM

Stamping(b)

OK

ADJUST PIN

CONTROL PLATE

Stamping(a)

NG

Fig.4-2a

4.2.2 FM waveform linearity

Signal (A1)

Mode (B) • PB
Equipment (C) • Oscilloscope
Measuring point (D) • TP106 (PB. FM)
External trigger (E) • TP111 (D.FF)
Adjustment part (F) • Guide roller [Mechanism assembly]
Specified value (G) • Flat V.PB FM waveform
Adjustment tool (H) • Roller driver [PTU94002]

• Alignment tape(SP, stairstep, PAL) [MHPE]

(A2)

• Alignment tape(LP, stairstep, PAL) [MHPE-L]

(1) Play back the alignment tape (A1).
(2) Apply the external trigger signal to D.FF (E), to observe

the V.PB FM waveform at the measuring point (D).
(3) Set the VCR to the manual tracking mode.
(4) Make sure that there is no significant level drop of the V.PB

FM waveform caused by the tracking operation, with its

generally parallel and linear variation ensured. Perform the

following adjustments when required. (See Fig. 4-2c.)
(5) Reduce the V.PB FM waveform by the tracking operation.

If a drop in level is found on the left side, turn the guide roll-

er of the pole base assembly (supply side) with the roller

driver to make the V.PB FM waveform linear.

If a drop in level is on the right side, likewise turn the guide

roller of the pole base assembly (take-up side) with the

roller driver to make it linear. (See Fig. 4-2c.)
(6) Make sure that the V.PB FM waveform varies in parallel

and linearly with the tracking operation again. When re-

quired, perform fine-adjustment of the guide roller of the

pole base assembly (supply or take-up side).
(7) Unload the cassette tape once, play back the alignment

tape (A1) again and confirm the V.PB FM waveform.
(8) After adjustment, confirm that the tape wrinkling does not

occur at the roller upper or lower limits. (See Fig. 4-2b.)

[Perform adjustment step (9) only for the models equipped

with SP mode and EP (or LP) mode.]

[Perform adjustment step (9) only for the models

equipped with SP mode and EP (or LP) mode.]

(9) Repeat steps (1) to (8) by using the alignment tape (A2).

Improper

(a)

GUIDE ROLLER

(b)

GUIDE POLE

Proper

Fig.4-2b

Proper waveform variation

Improper waveform variation

A

C

Up Down

B

D

Roller driver

Guide roller
(supply side)

Fig.4-2c

4.2.3 Height and tilt of the A/C head

Note:

• Set a temporary level of the height of the A/C head in ad-

vance to make the adjustment easier after the A/C head
has been replaced. (Refer to the SERVICE MANUAL
No.86700 [MECHANISM ASSEMBLY].)

Signal (A) • Alignment tape(SP, stairstep, PAL) [MHPE]
Mode (B) • PB
Equipment (C) • Oscilloscope
Measuring point (D1)

External trigger (E) • TP111 (D.FF)
Adjustment part (F) • A/C head [Mechanism assembly]
Specified value (G) • Maximum waveform

• AUDIO OUT terminal

(D2)

• TP4001 (CTL. P)

(1) Play back the alignment tape (A).
(2) Apply the external trigger signal to D.FF (E), to observe the

AUDIO OUT waveform and Control pulse waveform at the

measuring points (D1) and (D2) in the ALT mode.
(3) Set the VCR to the manual tracking mode.
(4) Adjust the AUDIO OUT waveform and Control pulse wave-

form by turning the screws (1), (2) and (3) little by little until

both waveforms reach maximum. The screw (1)

and (3) are for adjustment of tilt and the screw (2) for azi-

muth.

Head base

(2)

(1)

AUDIO OUT

A/C head

CTL. P

(3)

Fig.4-2d

(No.YD051)1-19

4.2.4 A/C head phase (X-value)

Signal (A1)

Mode (B) • PB
Equipment (C) • Oscilloscope
Measuring point (D) • TP106 (PB. FM)
External trigger (E) • TP111 (D.FF)
Adjustment part (F) • A/C head base [Mechanism assembly]
Specified value (G) • Flat V.PB FM waveform
Adjustment tool (H) • Roller driver [PTU94002]

• Alignment tape(SP, stairstep, PAL) [MHPE]

(A2)

• Alignment tape(LP,stairstep,PAL) [MHPE-L]

(1) Play back the alignment tape (A1).
(2) Apply the external trigger signal to D.FF (E), to observe the

V.PB FM waveform at the measuring point (D).
(3) Set the VCR to the manual tracking mode.
(4) Loosen the screws (4) and (5), then set the Roller driver to

the innermost projected part of the A/C head. (See Fig. 4-

2e.)
(5) Rotate the roller driver so that the A/C head comes closest

to the capstan. From there, move the A/C head back grad-

ually toward the drum until the point where the FM wave-

form is maximized for the second time, and then

tighten the screws (4) and (5) temporarily.
(6) Play an alignment tape (A2) and set to the manual-tracking

mode.
(7) Fine-adjust A/C head base position to maximize the FM

waveform, and then tighten the screws (4) and (5) firmly.
(8) Play alignment tapes (A1) and (A2) and confirm that the FM

waveforms are maximized when the tracking is at the cen-

ter position.

To the drum

Toward the capstan

Toward the drum

A/C head

Screw (5)

Roller driver

Screw (4)

Head base

To the capstan

Fig.4-2e

Alignment tape
[SP, stairstep]
played with the
SP head

Waveform output

X-value adjustment point

Drum side Control head position Capstan side

Alignment tape
[EP(LP), stairstep]
played with the
EP(LP) head

Maximum

Fig.4-2f

4.3 Electrical adjustment [VHS SECTION]

Note:

The following adjustment procedures are not only necessary
after replacement of consumable mechanical parts or board
assemblies, but are also provided as references to be referred
to when servicing the electrical circuitry.
In case of trouble with the electrical circuitry, always begin a
service by identifying the defective points by using the measur­ing instruments as described in the following electrical adjust­ment procedures. After this, proceed to the repair,
replacement and/or adjustment. If the required measuring in­struments are not available in the field, do not change the ad­justment parts (variable resistor, etc.) carelessly.

4.3.1 Servo circuit

4.3.1.1 Switching point

Signal (A1)

Mode (B) • PB
Equipment (C) • Oscilloscope
Measuring point (D) • VIDEO OUT terminal (75 ohm terminated)

External trigger (E) • TP111 (D.FF)
Adjustment part (F) • Jig RCU: Code “43-5A”
Specified value (G) • 6.5±0.5H
Adjustment tool (H) • Jig RCU [PTU94023B]

• Stairstep signal

(A2)

• Alignment tape(LP,stairstep,PAL) [MHPE-L]

• TP106 (PB. FM)

(1) Play back the signal (A1) of the alignment tape (A2).
(2) Apply the external trigger signal to D.FF (E) to observe the

VIDEO OUT waveform and V.PB FM waveform at the mea-

suring points (D1) and (D2).
(3) Set the VCR to the manual tracking mode.
(4) Adjust tracking so that the V.PB FM waveform becomes

maximum.
(5) Set the VCR to the Auto adjust mode by transmitting the

code (F) from the Jig RCU. When the VCR enters the stop

mode, the adjustment is completed.
(6) If the VCR enters the eject mode, repeat steps (1) to (5)

again.
(7) Play back the alignment tape (A2) again, confirm that the

switching point is the specified value (G).

Trigger point

Switching point

V.sync

V. rate

Fig.4-3a Switching point

4.3.1.2 Slow tracking preset

Signal (A1)

Mode (B1)

Measuring point (D) • TV-Monitor
Adjustment part (F) • Jig RCU: Code “43-71”or “43-72”
Specified value (G) • minimum noise
Adjustment tool (H) • Jig RCU [PTU94023B]

• Ext. input

(A2)

• Color (colour) bar signal [PAL]

• VHS SP

(B2)

•VHS LP

1-20 (No.YD051)

(1) Record the signal (A2) in the mode (B1), and play back

the recorded signal.
(2) Set the VCR to the manual tracking mode.
(3) Set the VCR to the FWD slow (+1/6x) mode.
(4) Transmit the code (F) from the Jig RCU to adjust so that the

noise bar becomes the specified value (G) on the TV

monitor in the slow mode.
(5) Set the VCR to the Stop mode.
(6) Confirm that the noise bar is (G) on the TV monitor in the

slow mode.
(7) Repeat steps (1) to (6) in the mode (B2).

Note:

• For FWD slow (+1/6x) playback, transmit the code “43-

08” from the Jig RCU to enter the slow playback mode.

4.3.2 Syscon circuit (EL, ER, EX, EY, EZ MODELS)

Notes:

• When perform this adjustment, remove the Mechanism

assembly.

4.3.2.1 Timer clock

Signal (A1) • No signal
Mode (B) • EE
Equipment (C) • Frequency counter
Measuring point (D1)

Adjustment part (F) • C3025 (TIMER CLOCK)
Specified value (G) • 1024.008 ± 0.001 Hz

• IC3001 pin 61

• IC3001 pin 24

(D2)

• C3026 + and -

(D3)

(976.5549 ± 0.0010 usec)

(1) Connect the frequency counter to the measuring point

(D1).
(2) Connect the short wire between the short point (D2) and

Vcc (5V).
(3) Short the leads of capacitor (D3) once in order to reset

the microprocessor of the Syscon.
(4) Disconnect the short wire between the short point (D2)

and Vcc then connect it again.
(5) Adjust the Adjustment part (F) so that the output frequency

becomes the specified value (G).

(No.YD051)1-21

4.4 Electrical adjustment (DVD SECTION)

4.4.1 Test mode setting method

(1) Press POWER button to turn off the unit.
(2) Press the following remocon keys continuously within 2seconds " SET UP " → " 2 " → " 8 " → " ENTER ".
(3) The unit becomes JIG RCU mode.
(4) Press POWER button then press VCR/DVD repeatedly so that the DVD indicatorlights up.
(5) Press the POWER button again to turn off the unit.
(6) Transmit the code "43-FA" from the Jig RCU.
(7) The power supply of the unit turns on automatically then the FDP shows the region number.
(8) To release test mode, press POWER button of the front panel.
(9) Each pressing of DISPLAY (--:--) button of the remote controller in test mode changes the mode as follows.

TV MONITOR(Example) FDP(Example)

HR-XV48

FE/BE VERSION:4624/S2712

**

NO DISC

HR-XV48

FE/BE VERSION:4624/S2712

**

NO DISC

VCR

1-22 (No.YD051)

CHECK MODE:CD LASER(NO DISC)

00:38
NO DISC

CHECK MODE:DVD LASER(NO DISC)

00:28
NO DISC

4.4.2 Method of displayed version of firmware

(1) Set the unit to the test mode.
(2) The version number is displayed in the monitor screen.

HR-XV48

FE/BE VERSION:4624/S2712

**

NO DISC

4.4.3 All-initialization method

Please perform all-initialization according to the following procedures in the following case:

• Just after you exchange the pick-up.

• Just after you exchange the spindle motor.

• Just after you exchange the traverse mechanism base.

NOTE:

Please perform all-initialization when you exchange the parts above and also when you remove the parts above.
(1) Set the unit to the test mode.
(2) Press the REVERSE SKIP/INDEX () key of the remote controller for more than 2 seconds.
(3) When initialization is completed, the PLAY (). mark is indicated in the FDP.

Model name
Version of firmware
Others

HR-XV48

BE INIT OK

**

NO DISC

(No.YD051)1-23

4.4.4 Upgrading of firmware

• Firmware update disc supports CD-R media.

• When firmware update is necessary, information is available from the homepage of DIGITAL VIDEO STORAGE CATEGORY, CS
group.

4.4.4.1 Creating an update disc

Please check the details of the update disc creation method by JS-NET.

(1) Down load the update file from JS-NET.
(2) Write the update file into CD-R. Pay attention in the following points when writing the update disc.

• Make sure to write in "Disc at Once".

4.4.4.2 Update procedure

(1) Turn the power ON. Load the update disc on the tray and close the tray.
(2) Update of the firmware starts automatically then “UPG” is indicated in the FDP, and the FDP indicator changes to "P" afterwards.
(3) Turn the power OFF then remove the disc and close the tray.

NUMBER

KEYS

SET UP

REVERSE

SKIP/INDEX

ENTER

DISPLAY

1-24 (No.YD051)

SECTION 5

TROUBLESHOOTING

5.1 Manually removing the cassette tape

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

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

form the disassembly of the major parts before removing
the mechanism assembly. (See Fig. 5-1a)

Fig.5-1a

Tension arm assembly

Pole base assembly

Pinch roller arm assembly

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

gear of the loading motor until the pole base assembly is
hidden behind the cassette lid. In doing so, hold the tape by
the hand to keep the slack away from any grease. (See
Fig.5-1b )

In case of mechanical failures, while keeping the ten­sion arm assembly free from tension, pull out the tape
on the pole base assembly. Take the spring(a) of the
pinch roller arm assembly off the hook, and detach it
from the tape.

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

cassette tape, top frame, cassette holder and side frames
(L, R) together from the rear and remove them by dis-en­gaging the hooks (a) and (b).

Screw(a)

Cassette tape

Hook(a)

Cassette holder

Top frame

Side frame(R)

Screw(a)

Spring(a)

Direction of unloading

Fig.5-1b

Side frame(L)

Hook(b)

Fig.5-1c

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

pletes removal of the cassette tape.

5.2 Manually removing the disk(DVD/CD)

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

(1) Unplug the power cord plug from the power outlet.
(2) Remove the top cover and front panel assembly.

(Refer to the disassembly procedure and perform the dis­assembly of the major parts before removing)

(3) Turn the Middle gear (a) by hand to open the disk tray.(See

Fig. 5-2a)

DVD unit

Middle gear (a)

Unloading

Fig.5-2a

(No.YD051)1-25