JVC XR-D400SL - Service Manual Immediate Download

SERVICE MANUAL

No.A0001

Contents

Safety precautions

Technical description

Disassembly method

Troubleshooting

Precaution for servicing

1-2

1-3

1-6

1-9

1-13

VICTOR COMPANY OF JAPAN, LIMITED

OPTICAL DISC BUSINESS DIV. PERSONAL & MOBILE NETWORK BUSINESS UNIT

AV & MULTIMEDIA COMPANY 1644, Shimotsuruma, Yamato, Kanagawa 242-8514, Japan

No.A0001

Sep. 2000

2000 VICTOR COMPANY OF JAPAN, LTD.

Printed in Japan

200009 (S)

MULTIPLE COMPACT DISC RECORDER

WER

1 TRACK ALL

REPEAT

SPEED

ERASE

OVER

OPEN/CLOSE

SOURCE

SPEED

REPEAT

FINALIZE

PROGRAM

REC

4x 2x 1x

OPEN/CLOSE

REC/PLAY

SCSI

AUTO REC

XR-D400SL

Germany

Area Suffix

XR-D400SL

1-2

Safety precautions

1. This design of this product contains special hardware and many circuits and components specially

for safety purposes.

For continued protection, no changes should be made to the original design

unless authorized in writing by the manufacturer.

Replacement parts must be identical to those

used in the original circuits.

Services should be performed by qualified personnel only.

2. Alterations of the design or circuitry of the product should not be made.

Any design alterations of

the product should not be made.

Any design alterations or additions will

void the manufacturer`s

warranty and will further relieve the manufacture of responsibility for personal injury or property

damage resulting therefrom.

3. Many electrical and mechanical parts in the products have special safety-related characteristics.

These characteristics are often not evident from visual inspection nor can the protection afforded

by them necessarily be obtained by using replacement components rated for higher voltage,

wattage, etc.

Replacement parts which have these special safety characteristics are identified in

the Parts List of Service Manual.

Electrical components having such features are identified by

shading on the schematics and by (

) on the Parts List in the Service Manual.

The use of a

substitute replacement which does not have the same safety characteristics as the recommended

replacement parts shown in the Parts List of Service Manual may create shock, fire, or other

hazards.

4. The leads in the products are routed and dressed with ties, clamps, tubings, barriers and the

like to be separated from live parts, high temperature parts, moving parts and/or sharp edges

for the prevention of electric shock and fire hazard.

When service is required, the original lead

routing and dress should be observed, and it should be confirmed that they have been returned

to normal, after re-assembling.

5. Leakage current check (Electrical shock hazard testing)

After re-assembling the product, always perform an isolation check on the exposed metal parts

of the product (antenna terminals, knobs, metal cabinet, screw heads, headphone jack, control

shafts, etc.) to be sure the product is safe to operate without danger of electrical shock.

Do not use a line isolation transformer during this check.

Plug the AC line cord directly into the AC outlet.

Using a "Leakage Current Tester", measure

the leakage

current from each exposed metal parts of the cabinet , particularly any exposed

metal part having a return path to the chassis, to a known good earth ground. Any leakage

current must not exceed 0.5mA AC (r.m.s.)

Alternate check method

Plug the AC line cord directly into the AC outlet.

Use an AC voltmeter having, 1,000 ohms

per volt or more sensitivity in the following manner. Connect a 1,500

10W resistor paralleled by

a 0.15

F AC-type

capacitor

between an

exposed

metal part and a known good earth ground.

Measure the AC voltage across the resistor with the

AC voltmeter.

Move the resistor connection to each exposed metal

part, particularly any exposed metal part having a

return

path

to the

chassis, and measure the

voltage across the resistor. Now reverse the plug in

the AC outlet and repeat each measurement voltage

measured any must not exceed 0.75 V AC (r.m.s.).

This corresponds to 0.5 mA AC (r.m.s.).

Good earth ground

Place this

probe on

each exposed

metal part.

AC VOLTMETER

(Having 1000

ohms/volts,

or more sensitivity)

1500

10W

0.15 F AC TYPE

! CAUTION Burrs formed during molding may be left over on some parts of the chassis. Therefore,

pay attention to such burrs in the case of preforming repair of this system.

XR-D400SL

1-3

Technical description

CD-R/RW recorder for digital audio

CD-R/RW drive for PC

[Fig. 1]

[Fig. 2]

[Table 1] Comparison of Recording and Playback

As its name implies, the XR-D400SL Multiple Compact Disc Recorder provides multiple functions, these

include a CD-R/RW recorder for digital audio and a CD-R/RW drive for a PC.

As the XR-D400SL can be used as a CD-R/RW recorder for digital audio in the dubbing/ recording modes, it is

classified as specific equipment under the private recording royalties system. As a result, discs recorded with

this recorder are distinguished from those recorded with a PC drive.

In the SCSI mode, the XR-D400SL can be used as a CD-R/RW drive for a PC by connecting it through the

SCSI interface. However, it is not possible to use the source disc tray as the dubbing source.

The dubbing source disc tray of the XR-D400SL incorporates a CD-ROM drive and a REC/PLAY disc tray,

which is the dubbing destination and incorporates the CD-R/RW drive (XR-RWD400S) for a PC.

The XR-RWD400S can also be used as a CD-R/RW recorder for digital audio according to the setting of the

control microcomputer.

The XR-RWD400S incorporates a flash memory to facilitate firmware read and write. The firmware is the

program used in controlling the drive.

The use of a flash memory makes it possible to rewrite programs easily.

The recording media royalties are limited to special discs (with a logo mark as shown in Fig. 1) containing the

recording of ID information, which are not recorded in the recording media for PCs.

XR-D400SL

Configuration of the XR-D400SL

CD-R/RW recorder for digital audio

Recording

Playback

CD-R/RW recorder for digital audio

Possible with discs having a logo as in Fig. 1 only

Possible with discs having a logo as in Figs. 1 and 2

CD-R/RW drive for PC

Possible with discs having a logo as in Figs. 1 and 2

Possible with having a logo as in Figs. 1 and 2

XR-D400SL

1-4

The XR-D400 incorporates the SCMS (Serial Copy Management System) and the RID (Recorder Unique Identifier)

functions.

SCMS is used to limit digital copies to one generation only. The principles are shown in Fig. 3.

With RID, the RID codes are written into discs which are as specified in the Orange Book Parts II and III. The

codes contain the manufacturer's name, product name and machine number to enable the tracing of illegal copies.

Digital recording

[Fig. 3] Principles of SCMS

Fig. 4 shows the structure of a CD-R disc.

In recording, a laser beam having the same wavelength as the

CD beam (780 nm) but of tens times higher power is irradiated

from the substrate surface to the groove.

This irradiation causes thermal deformation of the organic

pigment layer forming pits in it.

The organic pigments include cyanine, phtalocyanine and azoic

dyes and the reflective layer uses gold or silver materials.

In playback the laser beam reads the pits recorded in the

pregroove.

The thermal deformation of the organic pigment layer cannot be

recovered to the original condition. As a result, the CD-R discs

cannot be rewritten and only additional writing is possible with

them.

Fig. 5 shows the structure of a CD-RW disc.

The CD-RW uses a phase-changing recording material in the

recording layer.

With the CD-RW, a laser beam with regulated power and

cooling time is irradiated to form a crystalline phase (erased

status) and amorphous phase (recorded state) on the

polygroove and data is reproduced according to the difference in

reflectivity of the two phases.

An amorphous state can be obtained by quick cooling after

irradiation by a strong laser beam.

The phase-changing recording material is made of a compound

of silver, indium, antimony and tellurium, and rewriting is

possible up to about 1000 times.

As the reflectivity at 780 nm of the CD-RW is lower than the CD-

R, the RF amp gain should be changed in order to play a CD-

RW disc.

SCMS and RID functions

Recording on CD-R discs

Recording on a CD-RW disc

Comparison between the CD-R and the CD-RW

Label printed surface

Protective layer groove

Reflective layer

Organic pigment layer

Substrate

pregroove

Track pitch

1.6

µm

Laser beam

Signal surface

[Fig. 4]

Printed surface

Protective layer

Aluminum reflective layer

Upper protective layer

Recording layer

Lower protective layer

Substrate

polygroove

Signal surface

Laser beam

[Fig. 5]

CD-R

Compact Disc Recordable

CD-RW

Compact Disc Rewritable

Specifications

Laser reflectivity

Recording power

Playback on CD player

Orange Book Part II

65% or more

4 to 11 mW

Possible

Orange Book Part III

15% to 25%

8 to 14 mW

Impossible

[Table 2]

XR-D400SL

1-5

CD-R/RW

Lead-in area

This area records the TOC (Table Of Contents) including the number of tracks in the disc, track-start position

information, etc.

Data

This area contains the recording of actual audio signals, file data, etc.

The unit used in the data area is the track. Usually, music CDs use a track per song selection while the CD-

ROM discs basically uses only one track.

Lead-out

This area is used to indicate that the data in the disc has reached the end.

The combination of the lead-in, data and lead-out areas is referred to as a single session.

A disc containing multiple sessions is called a multi-session disc. The CD-EXTRA belongs to this kind of disc.

PCA (Power Calibration Area)

This area is used to regulate the laser power in data writing.

Its data optimizes laser power according to external factors such as the medium type, supply voltage and

operating temperature. The PCA provides an area for use in 99 times of test writing.

PMA (Program Memory Area)

This area contains the recording of the start and end positions of the tracks. When a disc is not finalized in

program recording, this area is used to obtain the preliminary TOC data.

PMA

Track 1

Track 2

Lead-out

PMA

Lead-in

Recording method of the CD-R/RW

As shown in Fig. 6, the recording areas of a CD-ROM and a CD-R/RW are different.

These discs use two recording areas in addition to the areas used for data recording by ordinary CD discs.

Finalization

Finalization refers to writing the preliminary TOC data in the PMA into the lead-in and lead-out areas.

When a disc is not finalized, its TOC data is recorded exclusively in the PMA.

Since ordinary CD players cannot read the PCA and PMA, non-finalized discs can be read only with a

REC/PLAY machine such as the XR-D400. This makes possible addition writing on the disc.

When a disc is finalized, its lead-in, data and lead-out areas are written properly and the disc becomes a disc

complying with the Orange Book specifications.

Fig. 7 shows the finalization procedure.

2 areas for CD-ROM

Inner direction

Outer direction

PCA

PMA

Lead-in

Data

Lead-out

[Fig. 6]

[Fig. 7]

Before finalization

Track rewriting

After finalization

(Preliminary TOC)

TOC data