JVC XR-D400SL User manual

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
COPYRIGHT 2000 VICTOR COMPANY OF JAPAN, LTD.
Printed in Japan
200009 (S)
MULTIPLE COMPACT DISC RECORDER
PO
WER
1 TRACK ALLREPEAT
SPEED
ERASE
OVER
OPEN/CLOSE
SOURCE
SPEED
REPEAT
FINALIZE
PROGRAM
REC
4x 2x 1x
1
11
2
12
3
13
4
14
5
15
6
16
7
17
8
18
9
19
10
20
OPEN/CLOSE
REC/PLAY
SCSI AUTO REC
XR-D400SL
XR-D400SL
XR-D400SL
E 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 AC
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 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
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 1
Track 1
Track 2
Track 2 Lead-out
PMA
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

XR-D400SL
1-6
1. Remove the 4 screws A from both sides of the top cover.
2. Remove the 4 screws B from the rear of the top cover, then
remove the stop cover.
Disassembly method
Removing the top cover (Figs. 1 & 2)
1. Remove the top cover.
2. Remove the 3 screws C that retain the front panel from the
bottom. (Fig. 3)
3. Unplug the connector A from the power supply board (Fig. 4)
and the flat wire from the control board (Fig. 5).
4. Disengage the 2 claws D from the front panel and remove
the front panel. (Figs. 4 and 5)
Removing the front panel (Figs. 3 to 5)
1. Remove the stop cover.
2. Unplug connector B from the power supply board (Fig. 4).
3. Remove the 6 screws E from the rear panel (Fig. 6).
4. Remove the 2 screws F retaining the SCSI connector, then
remove the rear panel.
(CAUTION) Screw F retaining the SCSI connector functions to
protect the connector. Be sure to remove it as a
last task in disassembly or a first one in assembly.
Removing the rear panel (Figs. 4 & 6)
Front panel
Connector B Connector A Flat wire
A
A
B
B
C
D
D
G
GG
G
Fig. 1
Fig. 2
Fig. 3
Fig. 5Fig. 4

XR-D400SL
1-7
F
E
E
CD-ROM drive
CD-R/RW drive Power supply
connectors
Control cable
Audio signal connector
H
H
Flat cable
Flat cable
Connector
I
I
1. Remove the top cover.
2. Remove the rear panel.
3. Unplug the connectors from the drives (CD-ROM drive:
power supply connector and control cable connector.
CD-R/RW drive: power supply connector, control cable
connector and audio signal connector). (Fig. 7)
4. Remove a total of 8 screws retaining the drives, from
the side panels. (Figs. 4 and 5)
5. Take out each drive in the rear direction.
Removing the CD-ROM and CD-R/RW drives
(Figs. 4, 5 and 7)
1. Remove the top cover.
2. Remove the rear panel.
3. Remove the CD-R/RW drive.
4. Remove the 6 screws H retaining the cover, then remove
the cover. (Figs. 8 and 9)
5. Stand up the board and unplug the 2 flat cables and 1
connector. (Fig. 10)
6. Remove the 4 screws I retaining the circuit board. (Fig. 11)
7. Unplug 1 flat cable and remove the circuit board. (Fig. 12)
Removing the CD-R/RW drive board
(Figs. 8 to 12)
Fig. 6
Fig. 7
Fig.8
Fig. 9
Fig. 12
Fig. 10
Fig. 11

XR-D400SL
1-8
JJ
CD-ROM drive
CD-R/RW drive
Tray eject hole
Tray eject hole
1. Remove the top cover.
2. Remove the front panel.
3. Remove the 13 screws J retaining the board.
Removing the front board (Fig. 13)
1. Remove the top cover.
2. Remove the front panel.
3. When removing a disc from the CD-ROM drive (upper
drive), insert a thin wire or similar object into the tray
eject hole at the right end of the drive. When the drive
comes out, pull it out toward the front.
4. When removing a disc from the CD-R/RW drive (lower
drive), insert a thin wire or similar object into the tray
eject hole at the left end of the drive. When the drive
comes out, pull it out toward the front.
Removing the disc (Fig. 14) Fig. 13
Fig. 14

XR-D400SL
1-9
NO
YES
YES
NO
OK
NO
NO
NO
NO
YES
YES
YES
YES
YES
YES
YES
NO
NO
Troubleshooting(For repairing the audio CD dubbing)
POWER button ON Check the CN991 and S1034
on the Front board.
Does the POWER
indicator light?
Are the pins and of the CN991
on the Front board short-circuited
Go to the "Power
Supply Operation".
Can the tray be
opened/closed with the
OPEN/CLOSE button?
Go to the
"OPEN/CLOSE Operation".
Can the SOURCE disc
drive read the
TOC of the CD?
Go to the
"Reproduction Operation"
Can the REC/PLAY disc
drive play the CD?
Is the audio output from
the CD in the REC/PLAY
disc drive?
Can the data be written
in the REC/PLAY
disc drive?
Are the front keys and
indicators normal?
Check the general
operations.
Go to the
"Audio Operation".
Go to the
"Write Operation".
Go to the "Front Key
/Indicator Operation".

XR-D400SL
1-10
CN991 section
(Note) Connection points of the 4 wires.
Do not disconnect any
other connections.
YES YES
YES
YES
YES
NO
NO
NO
First remove the 4 wires connected to the Power Supply unit (QAL0244-002) (see photo below) to do a check
of the stand-alone mode.
(1) Press the POWER button to ON, and check the voltages at the leftmost wire (red, DC +5 V) and the
rightmost wire (yellow, DC +12 V).
Then connect the wires and check the voltages as described below.
(1) Check the continuity between the GND line and leftmost wire (red, DC +5 V) and the rightmost wire (yellow,
+12 V) to ensure that there is no short-circuiting.
(2) Press the POWER button to ON and check the voltages at the leftmost wire (red, DC +5 V) and the
rightmost wire (yellow, DC +12 V).
If the CD voltage drops abnormally or the protection device (fuse, etc.) is released when the wires are
connected (i.e. load is applied), there may be short-circuiting on the load side or in the connection path.
Power supply operation
OPEN/CLOSE operation
Press the
OPEN/CLOSE button.
OPEN/CLOSE
operation is OK. Is DC power
supply normal?
Does the tray
open or close? Can other buttons
be used?
Can the tray be
opened/closed by the
OPEN/CLOSE button in the
stand-alone mode.
Check connections of
CN602, CN603 and
drives.
Check the Front and
Control boards.
Check connections of
CN111 and CN001.
Check the Front and
Control boards.
Check the connections
of CN602, CN603 and
the drives.
Go to the
"Power Supply Operation".
In the stand-alone mode the
OPEN/CLOSE button can be
pressed by removing the
front panel.
CD-ROM
drive
CD-R/RW
drive

XR-D400SL
1-11
Note 1) The access condition of each drive is shown by an indicator.
Blinking: The disc TOC data is being read.
Lighting: The disc TOC data has been read or is being reproduced.
Note 2) The TOC data of the disc in the SOURCE disc tray (CD-ROM drive) can be displayed as follows.
When the SOURCE indicator stops blinking and starts constant lighting, press the skip button (rewind
direction) to display the number of tracks on the disc.
Examples ) CTS-1000 Disc with 28 tracks: Track indicators 1 to 20 (Green) and the OVER indicator (Red) lights.
Other Disc with 12 tracks: Track indicators 1 to 12 (Green) light.
Reproduction operation
Audio operation
Insert a disc.
Can the TOC be read?
Is playback possible?
Applicable to REC/PLAY
disc tray only.
Reproduction
operation is OK.
Check the connections of
the CN602, CN603 and
drives.
Check the drives.
Check buttons.
Check the CD-R/RW drive.
YES
YES
YES
NO
NO NO
YES
NO
NO
During playback
Is audio output?
Audio operation is normal.
Is the audio free
from noise or
sound skip?
Is audio normal
at CN401 on
Control board?
Check the surroundings
of J401 on the IC401.
Check the 3-pin wire
connections.
Replace HQA-030A.
Replace HXL-3BSPA.

XR-D400SL
1-12
The REC/PLAY disc tray (CD-R/RW drive) is composed of the mechanism unit (HXL-3BSPA) and the board
ass'y (HQA-030A).
Therefore, in case of a write failure, check the following points first before proceeding to the next step.
The trouble is not due to the disc defect.
The FPC cable connecting the mechanism unit and the board ass'y is not disconnected or unplugged.
1. Symptoms, which may be due to a defect in the mechanism unit (HXL-3BSPA)
(1) There is no trace of writing on the CD-R/RW disc.
(2) Error during write.
(3) Rotation stopped during write.
(4) Write completes normally but the written disc cannot be reproduced.
(5) Either the CD-R or the CD-RW disc cannot be written onto.
(6) Disc cannot be recognized as a recordable CD-R/RW disc.
(7) Abnormal noise from the mechanism during disc rotation.
(8) Disc will not rotate.
(9) Disc rotation is unstable (the rotation speed increases suddenly).
2. Symptoms, which may be due to a defect in the board ass'y (HQA-030A)
(1) Write operation will not start.
(2) Disc will not rotate.
(3) The access LEDs do not light or blink.
Write operation
Front Key/Indicator operation
Press the
POWER button ON.
Are the key
operations normal?
Are the
indicators normal?
Front key and indicator
operations are OK.
Are the
connections of the
CN001 and
CN111 normal?
Check Front and
Control boards.
Connect the
CN001 and CN111.
YES
YES
YES
NO
NO NO

XR-D400SL
1-13
Precaution for servicing
Handling of board ass'y in REC/PLAY disc tray
After replacing the board ass'y (HAQ-030A), be sure to modify it for use with the XR-D400SL by performing
the following operations:
1. Remove 3 condensers and confirm the jumper settings.
2. Rewrite the firmware for XR-D400SL.
Note) The HQA-030A is not a part designed exclusively for the XR-D400.
1. Remove 3 condensers and confirm the jumper settings.
(1) Remove the condensers C429, C430 and C432 (for their locations, see Figs. 1 and 2).
[Fig. 1]
[Fig. 2]
[Fig. 3] [Fig. 4]
(2) Confirm the jumper settings.
The settings should be as shown in Fig. 3 and 4. The jumper should be inserted into the rightmost hole
when the board is seen from the rear.
2. Rewrite the firmware for XR-D400
A PC and firmware software are required to rewrite the firmware.
Create a folder in the hard disk of the PC and store both of these in the same folder.
Applicable PC
Firmware software
OS Windows 95/98
CPU Pentium 133 MHz or higher
Memory 16 MB or more
Model IBM compatible machine
Firmware software Download.exe
Firmware Zcp133s.hex

XR-D400SL
1-14
Rewrite procedure
(1) Connect the REC/PLAY disc tray in the stand-alone mode to the
PC. (Fig. 5)
Note) The PC connection procedure will be described later.
(2) While holding down the switch on the right of the front panel
(encircled in Fig. 5), boot the PC.
(3) Keep holding down the above switch until Windows has started up.
(4) Run firmware software Download.exe.
(5) When the firmware software screen appears (Fig. 6), confirm that;
the Vendor is JVC, the product is XR-W4424 and the Version is 1.00.
Note) If another content than the above is displayed, restart the operation
from step (2).
(6) After confirming that the BUS Type is ATAPI and that Create is checked, click the Update
button. (Fig. 6)
(7) When the screen as shown in Fig. 7 is displayed, select Zcp133s.hex, and click the OK
button.
(8) The firmware rewriting starts and the access LED on the front panel changes from amber
lighting to amber blinking.
Rewriting takes about 60 seconds. The extinction of the access LED indicates the
completion of the firmware rewriting.
(9) When the screen in Fig. 6 is displayed again, click Close to close the firmware software.
[Fig. 5]
[Fig. 6]
[Fig. 8]
[Fig. 9]
[Fig. 7]
Firmware version check procedure
(1) Boot the PC.
Note)If this procedure is started immediately after the rewriting procedure above, do not
simply restart the PC but be sure to switch it off and then on again.
(2) Open the Device Manager.
Click [Start] R [SettingR [Control Panel] R [System].
Select [Device Manager] and click [CD-ROM].
(3) When the screen shown in Fig. 8 is displayed, select JVC XR-RWD400S.
(4) Open the Properties of JVC XR-RWD400S and select Setting.
(5) Confirm that the firmware revision number is 1.33. (Fig. 9)

XR-D400SL
1-15
[Fig. 11]
[Fig. 12]
[Fig. 10]
Figs. 11 and 12 show the actual connections between the REC/PLAY disc tray and the PC.
The connections to the PC consist of connecting the IDE cable (40-pin) and the power supply cable (4-pin)
as shown in Fig. 12.
Connection to a PC
Fig. 10 shows the connection diagram of the PC.
The REC/PLAY disc tray can be set as the master according to the jumper setting. After setting, connect the
REC/PLAY disc tray to the secondary IDE cable.
Do not connect other equipment to the secondary cable.
IDE cable, 40-pin
Primary
Secondary
ISA bus
PC
Master Slave
Master
Hard Disk Drive Other
Equipment
REC/PLAY
Disc Tray

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
COPYRIGHT 2000 VICTOR COMPANY OF JAPAN, LTD.
Printed in Japan
200009 (S)
MULTIPLE COMPACT DISC RECORDER
PO
WER
1 TRACK ALLREPEAT
SPEED
ERASE
OVER
OPEN/CLOSE
SOURCE
SPEED
REPEAT
FINALIZE
PROGRAM
REC
4x 2x 1x
1
11
2
12
3
13
4
14
5
15
6
16
7
17
8
18
9
19
10
20
OPEN/CLOSE
REC/PLAY
SCSI AUTO REC
XR-D400SL
XR-D400SL
XR-D400SL
E Germany
Area Suffix

XR-D400SL
2-1
Block diagram
CD-ROM DRIVE ASSY POWER SUPPLYASSY AC
QAL02335 QAL0244 100V
POWER DC +12V(YELLOW)
SUPPLY
4 PIN DC +5V(RED)
ATAPI I/O
40PIN
2PIN
CD-R/RW DRIVE ASSY
CONTROL PCB ASSY FRONT PCBASSY CN911
LOADER ASSY MAIN PCBASSY LEA10014 CN501 LEA10012 S1034
HXL- 3BSPA 27 PIN HQA-030 CN401 CN602 CN001 CN111 POWER SW
POWER ATAPI 21 PIN
SUB PCB UNIT CN107 CN407 SUPPLY I/O
IC101
IC101 u-COM
PRE AMP CN108 CN408 CN401 CN603 CN201 IC991 IC992
ATAPI 40 PIN ATAPI SCSI LED DRIVER
I/O I/O IC201 INTERFACE
CN101 27 PIN SCSI CONVERTER
50 PIN LED
LASER IC403 IC401
PICK- UP CN405 DAC S202 SCSI
ID SW
SPINDLE MOTOR CN401
FEED MOTOR 18 PIN J401
IC417 AUDIO OUT
LOADING MOTOR CN402 3 PIN
OPEN/CLOSE SW AUDIO OUT
CN401
LOADER UNIT 5 PIN

6
5
4
3
2
1
BCDEFGHI JA
7
XR-D400SL
2-2
Standerd schematic diagrams
Front Key/Indicator circuit

6
5
4
3
2
1
BCDEFGHI JA
7
XR-D400SL
2-3
Control circuit

6
5
4
3
2
1
BCDEFGHI JA
7
XR-D400SL
2-4
Board interconnection