Sony LDP-1500P User manual

SERVICE MANUAL
June, 1986
AEP Model
UK Model
Lasermax
This manual contains the SUPPLEMENT1 -2.
SPECIFICATIONS
Playback system
Disc format
Pick-up method
Laser
Videodisc
Maximum playing time
Spindle revolution
Access time
Video
Signal
Output
Resolution
Audio
Output
Signal-to-noise ratio
Frequency response
Laser Vision
Laser beam (reflective)
Diode laser
(A= 7800A)
12" and 8"
CAV: 36 min/side
CLV:
60 min/side
CAV: 1500 r.p.m.
CLV:
1500 to 570 r.p.m.
CAV:
2.5 sec (by frame)
1
Osec (by chapter)
CLV:
10 sec
CCIR standards, PAL color
1.0 V p-p, 75 ohms unbalanced, sync
negative
Color: 450 lines
Line out: Less than 2 kilohms
0 dB (100% MOD)
unbalanced
Headphones: 8 ohms
-20 dB [V] max
ex ON: 70 dB
ex OFF: 56 dB
20 Hz to 20kHz
Video/Audio (TV connector)
Video 1.0 Vp-p
Audio OdB [V]
Status + 11 V DC
•
General
Power requirements
Power consumption
Operating temperature
Operating humidity
Storage temperature
Dimensions
Weight
Supplied accessory
Optional accessories
220/240V
AC, selectable, 50/60 Hz
35 W
5°C to 35°C (40°F
to 95°F)
25%
to 80%
-20°C to 60°C
(-4°F to 140°F)
Approx.
424x 116x405 mm (w/h/d)
(16
3/4 x 45
/a x 16 inches)
Approx.
10.7 kg (23 lb 9 oz)
AC power cord
Interface Manual LDM-1500
Rack Mount Kit
RMM-201 B
Remote Control Unit
RM-2001
External Sync Lock Board DB-1500P
Design and specifications subject to change without notice.
Note
This appliance conforms with EEC Directives 78/889 and 82/499 regarding
interference suppression.
·· '·
e VIDEODISC PLAYER
SONY.

WARNING
To prevent fire or shock hazard, do not expose the unit to rain or moisture.
To avoid electrical st;iock, do not open the cabinet. Refer servicing to
qualified personnel only.
CAUTION
Use of controls or adjustments or performance of procedures other than
those specified herein may result
in hazardous radiation exposure.
CLASS 1
LASER PRODUCT
DANGER
This videodisc player is classified as a
CLASS 1 LASER PRODUCT.
The CLASS 1 LASER PRODUCT label is
located on the rear panel
of the player.
Invisible laser radiations when open and
interlock failed or defeated.
Avoid direct exposure to beam.
FOR THE CUSTOMERS IN THE UNITED
KINGDOM
THIS APPARATUS MUST BE EARTHED
IMPORTANT
The wires in this mains lead are coloured in accordance with the follow-
ing code:
Green-and-yellow Earth
Blue Neutral
Brown Live
As the colours of the wires in the mains lead of this apparatus may not
correspond with the coloured markings identifying the terminals in your
plug proceed
as follows:
The wire which
is coloured green-and-yellow must be connected to the
terminals
in the plug which is marked by the letter Eor by the safety earth
symbol
-1- or coloured green or green-and-yellow. The wire which is col-
oured blue must
be connected to the terminal which is marked with the
letter N or coloured black. The wire which is coloured brown must
be
connected to the terminal which is marked with the letter Lor coloured
red.
Use PAL/SECAM 525 videodiscs
COLOUR
This player is to be used exclusively with the PAUSECAM colour
videodiscs, and is designed to output video signals conformed with the
PAL colour system. NTSC videodiscs cannot
be used in this player.
laserVision
CED and VHD type videodiscs cannot be used in this player.

TABLE OF CONTENTS
1. GENERAL DESCRIPTION
1-1. Features . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
1-2. Tips on Videodiscs . . . . . . . . . . . . . . . . . . 1-2
1-3. Precautions
....................... 1-5
1-4. Notes on Handling Videodiscs ........... 1-6
1-5. Parts Identification . . . . . . . . . . . . . . . . . . 1- 7
1-6. Connections . . . . . . . . . . . . . . . . . . . . . . 1-13
1-7. To Play Back a Videodisc .............. 1-15
1-8. Various Playback Modes
.............. 1-17
1-9. Search and Repeat Operations ........... 1-18
1-10. Notes
on Operation with the RM-2001
Remote Control Unit 1-19
1-11. Connection with an External Computer . . . . 1-20
1-12.
NoteonlnstallingthePlayerinaRack ..... 1-22
1-13. Troubleshooting . . . . . . . . . . . . . . . . . . . . 1-24
2. DISASSEIVIBLY
2-l. Removal of Cabinet ................. 2-1
2-2. Opening of SS-32 and VP-18 Board ....... 2-2
2-3. Removal of Loading Motor ............. 2-2
2-4. Removal of Flexible Card Wire .......... 2-3
2-5. Removal of PR-80 Board . . . . . . . . . . . . . . 2-3
2-6. Removal of the Sled Block ............. 2-4
2-7. Disassembly
of Sled Block . . . . . . . . . . . . . 2-4
2-8. Removal
of Chuck Block . . . . . . . . . . . . . . 2-5
2-9. Removal of F.L Block . . . . . . . . . . . . . . . . 2-6
2-10. Removal of Spindle Motor and
Optical Block Ass'y ................. . 2-7
Note for Handling of Optical Block Ass'y
(KSS-141A)
.......................... · · 2-8
3. MECHANICAL ALIGNMENT
3-1. Photo Interruptor Position Adjustment ..... 3-1
3-2. Chuck Ass'y Pressing Adjustment ........ 3-2
3-3. Loading Switch Position Adjustment ...... 3-2
3-4. Position Gear Fixing Adjustment ......... 3-2
3-5. Position Gear Phase Adjustment ......... 3-3
4. ELECTRICAL ALIGNMENT
4-1.
4-1-1.
4-1-2.
4-1-3.
4-2.
Miscellaneous
Adjustment ............. 4-2
DC
Power Regulator Adjustment ....... 4-2
Spindle
PWM Ref 2H Adjustment ...... 4-2
Decoder Clock
Adjustment ........... 4-2
Focus Servo Adjustment .............. 4-2
4-2-1.
Focus Bias Adjustment ............. 4-2
4-2-2.
Focus Gain Adjustment ............. 4-3
4-3. Tracking Servo Adjustment ............ 4-3
4-3-1. Tracking Bias
Adjustment ........... 4-3
4-3-2. Tracking Gain
Adjustment ........... 4-3
4-3-3. Track
Jump Adjustment ............ 4-4
4-4. IN/OUT Limit Position
Adjustment ....... 4-5
4-4-1. IN Limit Adjustment ............... 4-5
4-4-2. 12
inch Disc Out Limit Adjustment ..... 4-5
4-4-3. 8 inch Disc Out Limit Adjustment . . . . . . 4-5
4-5. Video System
Adjustment . . . . . . . . . . . . . 4-6
4-5-1.
Demodulator Video Level Adjustment ... 4-6
4-5-2.
4-5-3.
4-5-4.
4-5-5.
4-5-6.
4-5-7.
4-5-8.
4-5-9.
4-5-10.
4-5-11.
Dropout Sensitivity Adjustment ....... 4-6
DOC Video Level
Adjustment . . . . . . . . . 4-6
CCD Bias
Adjustment . . . . . . . . . . . . . . 4-7
Video Out Level Adjustment . . . . . . . . . 4-7
TBC Centering Adjustment . . . . . . . . . . . 4-7
TBC
1/2H Rejecter Adjustment ........ 4-7
CF U/V Separator Adjustment ........ 4-8
CF Video Level Adjustment .......... 4-8
CF Chroma: Level Adjustment ......... 4-8
B.B
SC Adjustment . . . . . . . . . . . . . . . . 4-9
4-5-12.
B.B H Sync Adjustment ............. 4-9
4-5-13. Skew Servo Adjustment ............. 4-9
4-6. Audio System Adjustment ............. 4-10
4-6-1. TBC Centering Adjustment ........... 4-10
4-6-2. TBC Gain Adjustment .............. 4-10
4-6-3. LINE OUT Level
Adjustment . . . . . . . . . 4-10
5.
5-1.
5-2.
5-3.
5-4.
DIAGRAMS
Location of the Printed Circuit Boards 5-1
Overall Block Diagram . . . . . . . . . . . . . . . . 5-2
Video System Block Diagram . . . . . . . . . . . 5-4
Focus, Tracking, Slide Servo System
5-5.
5-6.
5-7.
Block Diagram . . . . . . . . . . . . . . . . . . . . . 5-7
Spindle Servo Block Diagram . . . . . . . . . . . 5-9
Audio System Block Diagram . . . . . . . . . . . 5-11
P~inted Wiring Boards and
Schematic Diagrams
................ .
PR-80, DUS-131
................... .
VP-18
...... ~ ................... .
SS-32, SW-138, DUS-127, DUS-129
...... .
SV-79 .......................... .
5-13
5-13
5-18
5-25
5-32
AU-73, HP-25
... · .................. 5-37
KY-93, SW-127, DUS-128, PD-31
........ 5-43
RS-21
........................... 5-47
PS-113, DUS-130 ................... 5-47
6. SPARE PARTS
6-1. Parts Information ................... 6-1
6-2. Exploded Views .................... 6-3
6-2-1. Ornamental Panel . . . . . . . . . . . . . . . . . 6-3
6-2-2. Chuck Ass'y . . . . . . . . . . . . . . . . . . . . 6-5
6-2-3. Front Loading ................... 6-7
6-2-4. Chassis
(1) . . . . . . . . . . . . . . . . . . . . . . 6-9
6-2-5. Chassis
(2) . . . . . . . . . . . . . . . . . . . . . . 6-11
6-2-6. Mechanical Base .................. 6-13
6-3. Electrical Parts List . . . . . . . . . . . . . . . . . . 6-15
SUPPLEMENT-1.
SUPPLEMENT-2.
-1-

PROTECTION OF EYES FROM LASER BEAM DURING SERVICING
This set employs a laser. Therefore, be sure to fol-
low carefully the instructions below when servicing.
WARNING!!
WHEN SERVICING, DO NOT APPROACH THE LASER
EXIT WITH THE EYE TOO CLOSELY. IN CASE IT IS
NECESSARY TO CONFIRM LASER BEAM EMISSION,
BE SURE TO OBSERVE FROM A DISTANCE OF MORE
THAN 25 cm FROM THE SURFACE OF THE OBJECTIVE
LENS
ON THE OPTICAL PICK-UP BLOCK.
CAUTION LABEL: Mounting and contents of the
caution lavel is as shown below.
1. Laser Diode Properties
• Material: GaAlAs
• Wavelength: 780 nm
• Emission Duration: continuous
• Laser Output: max. 0.4 mW*
* This output is the value measured at a distance of
about 1.6 mm from the objective lens surface on
the Optical Pick-up Block.
• Classification: Class illb
2. During service, do not take the Optical Pick-up
Block
apart, and do not adjust the APC circuit.
If there is a breakdown in the APC circuit (includ-
ing laser
diode), replace the entire Optiocal Pick-
up Block (including APC borad).
BESKYTTELSE AF 0JNE MOD LASERSTRALING UNDER SERVICE
I dette apparat anvendes laserlys. Derfor skal
nedenstaende instruktioner n0je folges under service.
F0lg i0vrigt instruktionerne i servicemanualen.
ADVARSEL!!
Under service ma 0jnene
ikke komme nan objektiv-linsen
pa den optiske pick-up enhed. I tilfoolde af at det er
n0dvendigt
at kontrollere udsendelsen af laserlys, skal
det ske i en afstand af mere end 25 cm fra den optiske
pick-up.
LASER ADVARSEL MA:RKNING
F0lgende mrerkning findes indvendig i apparatet:
1. Advarsel Mrerkning
VAROITUS! Laite sisaltaa laserdiodin joka lahettaa
(nakymatonta) silmille vaarallista lasersateilya.
Utsnilningen
fnin den laserkomponent som finns i
denna laserprodukt overstiger den stralningsgrans
som stalls
pa Klass 1.
Laser-dioden
data
• Materiale: GaAlAs
• B.elgelrengde: 780 nm
• Udstraling: Kontinuerlig
• Laseroutput: Max. 0,4 mW*
* Malt i 1,6 mm afstand fra overfladen af objektiv-
linsen pa den optiske pick-up enhed.
• Klassifikation: Klasse illb.
2. Adskil aldrig den
optiske pick-up enhed under
service, og juster ikke APC kredslebet (Automatic
Power Control). Hvis APC kredsl.ebet (incl. laser-
dioden) bryder ned, skal hele den optiske pick-up
enhed (incl. APC printkortet) udskiftes.
CAUTION : INVISIBLE LASER RADIATION WHEN OPEN
AND INTERLOCKS DEFEATED. AVOID EXPOSURE TO BEAM.
ADVARSEL : USYNLIG LASERSTRALING VED ABNING
NAR SIKKERHEDSAFBRYDERE ER UDE AF FUNKTION UNDGA
UDSA'TTELSE FOR STRALING.

SECTION 1
GENERAL DESCRIPTION
1-1. FEATURES
No physical contact between pick-up and disc
A laser beam acts as the signal pick-up for contact-free playback and
no wear on your valuable videodiscs. The audiovisual pit pattern is record-
ed below the surface of the videodisc for safe handling. There is no more
need to be constantly on your guard against fingerprints and dust.
Computer control
The built-in microprocessor controls almost all the functions of this player.
Various functions, such as search and repeat, are possible with an ex-
ternal computer through an RS-232C interface connector.
High speed access
Any frame on the disc can be located within 2.5 seconds.
Remote control operation ,
By using the RM-2001 optional remote control unit, not only the opera-
tion of the main buttons on the front panel but also search and repeat
operation are remotely controlled. Remote control operations are possi-
ble in both wired and wireless modes.
Automatic front loading
Videodiscs are inserted in the front of the LDP-1500P. This represents
a great saving of space when compared with top loading models.
Mountable on a 19" rack
The videodisc player can be mounted on an EIA standard 19" rack. An
optional RMM-201 B rack mount kit is available to install the videodisc
player into the 19" rack.
Black burst video out signals in the search mode
The signal output from the computer are superimposed over the videodisc
picture so that they can even be seen in the search mode.
Screw-less mechanism for transportation
This new mechanism eliminates the need to tighten special screws to
fix the laser pick-up before transporting the videodisc player.
External Sync Lock Board
A sync lock function can be provided by installation of a separate op-
tional board (D8-1500P). This allows various videodisc applications. Con-
tact your authorized Sony representative as adjustment of the unit is
necessary.
1-1

1-2. TIPS ON VIDEODISCS
TYPES OF VIDEODISCS
CAV (constant angular velocity) disc
The CAV disc always rotates at a constant speed of 1500 r.p.m. and the
laser beam moves from the inner part of the disc to the outer.
Up to 36
minutes of playback (54,000 frames) is possible on one side of the disc.
Each frame of the playback picture is recorded
on one track and is
reproduced in one rotation. The frame number is recorded on the track.
Flexible playback operation such
as variable speed playback, repeat play
or computer-controlled playback is possible using the frame numbers as
reference.
CLV (constant linear velocity) disc
With the CLV disc, the rotational speed varies from 570 r.p.m. to 1500
r.p.m. so that a constant linear velocity is maintained. The laser beam
moves from the inner part of the disc to the outer as with CAV discs.
Playback of
up to one hour is possible on one side of the disc, although
only normal play, scan and search operations
are possible. The elapsed
playback time or the chapter number being played can
be displayed on
the monitor screen. Searches to the beginning of chapters or specified
time codes is possible.
*1) Frames
The
CAV discs have up to 54,000 "frames" which are numbered in sequence. One frame is
recorded
on one track, that is, a frame is played back with one rotation of the disc.
You can search for a particular frame quickly or repeat a particular sequence of frames.
*2) Picture stop
When the player detects this code, the playback enters the still mode. This code may
be ig-
nored in the scan and search modes.
*3) Chapters
There
are CAV and CLV discs on which "chapters," as the chapter of a book, are pre-recorded.
If a chapter number is displayed after a frame number has
been displayed (on a CAV disc)
or after playback time is displayed
in minutes (on a CLV disc) when you change the display
mode, the data are pre-recorded
in chapters.
You can easily search for a particular chapter and play it back repeatedly.
* 4) Lead-in/Lead-out
When the player detects the lead-out code, it returns to the beginning of a disc, detects the
lead-in code and repeats playback or stops at the beginning of the program area according
to the AUTO REPEAT switch setting.
When the player detects the lead-in code or lead-out code in SCAN mode, the same result
will
be obtained.
1-2

Comparison of Sony Videodisc Code Types
customer's creation
type purpose location
on disc capacity method encoding method
I. CAV Discs
Vertical blanking
(partial listing)
-frame number* 1)
frame access all vertical blankings 00001 to 54000
not available added
automatically dur-
(picture numbers) ing
mastering
-picture stop* 2)
automatic stop on a designated vertical inter- up to 54000
list of time codes on a added during mastering
frame, during "play" and vals
master tape to have stops
"slow" modes
-chapter n~mber * 3)
divide content into designated vertical blank-
00 to 79; min chapter=
list of first/last time
added during mastering
chapters ings
30 tracks
codes on a master tape of
alI chapters
II. CLV Discs
Vertical blanking
-time code number
time code access all vertical blankings
00 hr 00 mins 00 sec to 01
not available added
automatically dur-
hr 00 mins
ing mastering
-chapter number
divide content into designated vertical blank- 00
to 79;
minimum =30 list of first/last time added during mastering
chapters ings tracks
codes on a master tape of
all chapters
Ill. CAV/CLV Discs
Vertical blanking
-Leap-in* 4)
locate the beginning of
designated vertical blank-
not available added
during mastering
the program on a disc ings
-Lead-out* 4)
locate the end of the pro-
designated vertical blank-
not available added
during mastering
gram on a disc
ings
1-3 1-4

1-3. PRECAUTIONS
On safety
• Operate the unit with 220/240 V AC, 50/60 Hz.
• Should any solid object or liquid fall into the cabinet, unplug the unit
and have it checked by qualified personnel before operating it any
further.
• Unplug the unit from the wall outlet if it is not to be used for an ex-
tended period of time.
• To disconnect a cord, pull it out by the plug. Never pull the cord itself.
On installation
• Avoid placing the player in a location subject to:
-high humidity
-high temperature
-excessive dust
-mechanical vibration
-direct sunlight
• Allow adequate air circulation to prevent internal heat buildup. Do not
place the unit on surfaces (rugs, blankets, etc.) or near materials (cur-
tains, draperies) that may block the ventilation holes.
On operation
• Do not operate the unit right after having transported it from a cold
location directly to a warm location or in a room where the temperature
rises suddenly because moisture may condense in the operating sec-
tion of the unit. Wait for about an hour before turning the power on
in the new location or keep the rise in room temperature gradual. If
the unit is operated with moisture condensation, the unit and the disc
may be damaged. Therefore remove the disc immediately when there
is a possibility of moisture condensation and no picture is obtained.
To evaporate the moisture rapidly, leave the player turned on without
a disc loaded.
• Remove the disc from the compartment after playing it, if the unit will
not be used for any length of time. Do not transport the set with a
disc in place.
• To open or close the disc compartment, press the OPEN/CLOSE but-
ton. Do not pull or push the disc compartment forcibly.
• When the disc compartment is in the open position, do not press down
on it strongly, or place heavy objects.
On cleaning
Clean the cabinet, panel and controls with a dry soft cloth, or a soft cloth
lightly moistened with a mild detergent solution. Do not use any type of
solvent, such as alcohol or benzine, which may damage the finish.
1-5

On packing
Do not throw away the carton and packing materials. They make an ideal
container in which to transport the unit. When shipping the unit to another
location, repack it as illustrated on the carton.
If you have any questions about'1his unit, contact your authorized Sony
service facility.
1-4. NOTES ON HANDLING VIDEODISCS
Handle the disc by its edge, and keep the disc clean.,
Do not stick paper or tape on the disc surface.
Not this way
Do not expose the disc to direct sunlight or heat sources such as hot
air ducts, or leave it in a parked car in direct sunlight which can result
in a considerable rise in the temperature.
Before playing, clean the disc with a soft cloth.
Do not use solvents (such as benzine or thinner) or commercially available
cleaners or anti-static sprays intended for audio discs.
After playing, store the disc in its case.
1-6

1-5. PARTS IDENTIFlCATION
FRONT PANEL
0 SCAN buttons----------
$ PLAY button and indicator---..J
8 OPEN/CLOSE button ----
PAUSE button and indicator
CLV disc
indicator
,_ _____________ ..1r-
1
;.£i~~-tl EXT CPU
indicator
ex indicator
REMOTE
LEVEL control
--111i1a HEADPHONES jack
(Stereo phone jack)
"-----'1.u POWER switch
0 SCAN buttons
6) SENSOR
and indicator
--11:!ll AUTO REPEAT
ON/OFF switch
AUDIO signal
--- a.m selector and
indicators
REMOTE
----'llllllllll connector
Keep one of these buttons depressed for high-speed playback (about
100 times normal speed). The 8 button initiates scanning in the
forward direction, and the 8 button in reverse. When the button
is released, normal speed playback will be resumed. With the chapter
number displayed on the monitor screen, chapter stop at the begin-
ning of the present chapter (when the S button is pressed) or at
the beginning of the next chapter (when the s· button is pressed)
is possible. The player enters the still mode with a GAV disc, and
the normal playback mode with a CLV disc.
f) PLAY button and indicator
Press this button for normal playback. The indicator blinks while
loading or unloading a videodisc.
1-7

8 OPEN/CLOSE button
Press to open the disc compartment and again to close it. The
compartment will also close automatically when it is pushed lightly.
Be sure to press the center of the compartment for proper operation.
8 PAUSE button and indicator
Press this button to set the player to the pause mode. A still picture
is displayed for CAV discs. No picture will be displayed on the screen
if the disc being played is CLV (muted state). The pause indicator
lights up when the videodisc is in the pause mode. The indicator
blinks if the disc compartment movement is interrupted while being
opened or closed.
The pause indicator also lights up when the player is placed in still
or stop mode using the RM-2001 optional remote control unit.
C, CLV disc indicator
Lights when the disc being played back is CLV. This indicator is not
illuminated for CAV discs.
G) EXT CPU indicator
Lights when the player is controlled by an external computer through
the RS-232C interface connector. In this mode, pressing the function
buttons (PLAY, PAUSE, SCAN and AUDIO) on the player and optional
remote control unit has no effect. The videodisc player will
automatically respond to commands given by the external computer.
8 ex indicator
The indicator will light up when a videodisc containing a special code
for activation of the CX Noise Reduction System* is played.
C) REMOTE SENSOR and indicator
The sensor on the right acts as a receptor for infrared control signals
from the optional RM-2001 remote control unit. When a button on
the RM-2001 is pressed, the red lamp on the left blinks to indicate
command detection.
f) AUTO REPEAT ON/OFF switch
When this switch is ON, the videodisc will be automatically played
again from the beginning when it reaches the end. The OFF posi-
tion means that playback of the videodisc will not be repeated. Like
the other controls on the front panel, this switch has no effect when
the player is controlled by an external computer (indicated by illumina-
tion of EXT CPU indicator).
1-8

G) AUDIO signal selector and indicator
Each videodisc has two audio channels: channel 1 and channel 2.
When the player is turned on, both channels are selected and the
CH-1 and CH-2 indicators will light up. Pressing the selector once
will select audio channel 1 and pressing it again will select audio
channel 2. The original state (both channels selected) can be restored
by pressing the selector once more.
a, REMOTE connector
This special mini jack allows for wired connection of the optional
RM-2001 remote control unit. Use of a wire allows for remote control
from locations which are not in line of sight with the LDP-1500P.
f) LEVEL control
Turn to adjust the volume of the headphones. Rotation to the right
increases the volume.
G) HEADPHONES jack (Stereo phone jack)
Headphones for audio monitoring are connected here. The volume
is adjusted with the LEVEL control.
4D POWER switch
Press to turn on the power of the player. The CH-1 and CH-2 indicators
function as power indicators. Press the button again to turn the power
off.
*CX Noise Reduction System
This system is employed to improve the signal-noise ratio and enlarge the dynamic range
of audio signals recorded on video discs.
CX is a trademark of CBS.
1-9

REAR PANEL
---0 BAUD RATE
selector
f) RS-232C
connector
---0 VIDEO OUT connector
0 LINE OUT jacks
8 Series number label
C, AC inlet
0 TV connector
--- C, VOLTAGE SELECTOR
0 BAUD RATE selector
Select the speed at which data is transmitted over the RS-232C line.
The baud rate can be set
to 9,600,4,800,2,400or 1,200 baud. Be sure
that the selector is matched to the baud rate of theexternal com3
puter. The factory setting is 1,200 baud.
up
down
BAUD
RATE
2 3 4
8 RS-232C connector
Switch setting
1 2 3 4
u d d d
d u d d
d d u d
d d d u
u: up
d: down
Baud rate
1,200
2,400
4,800
9,600
Standard 25-pin
RS-232C interface connector for communication with
an external computer.
Refer
to page 1-20 for connection with an external computer.
1-10

Pin assignment
13
0000000000000
000000000000
25
14
Pin No.
Signal
1
FG (Frame ground)
2 TxD (Transmit data)
3 RxD (Receive data)
::J
RTS (Request to send)
CTS (Clear to send)
6 DSR (Data set ready)
7 GND
20 DTR (Data terminal ready)
Each signal conforms to the RS-232C specifications.
(Output level ON: more than + 5V, OFF: less than -5V)
Note: Check the RS-232C pin assignment of the external computer
to be connected. There is a modem mode and terminal mode for pin
assignment. The RS-232C pin assignment for LDP-1500P is for the
terminal mode.
6) VERSION number label
Shows the ROM version on the player.
8 Series number label
This number distinguishes if an optional board is installed or not.
0 AC inlet
Grounded three-prong AC power inlet. The power cord is connected
here and the other end is inserted into the appropriate AC wall outlet
(220V or 240V).
C) VOLTAGE SELECTOR
This selector is set to either the 220V or 240V position according to
the power supplied from the wall outlet.
8 VIDEO OUT connector
BNC connector for the output of composite video signals.
1-11

C, LINE OUT jacks
Phone jacks (RCA-type) for audio signal output.
The audio signals of channel 1 (CH-1) are output from the 1/L jack,
and the signals of channel 2 are output from the 2/R jack.
0 TV connector
21-pin (CENELEC standard) connector for video and audio signal
outputs.
If your monitor
TV has a connector of the same type, connect the
cable (with the square 21-pin plugs) to this connector to supply the
video and audio signals to the monitor TV with a single cable.
Pin assignment
Pin No.
Signal Pin No. Signal Pin No. Signal
1 Audio B 8 Status (+
11V) 15
NC
2 NC
9 NC 16
NC
3 Audio A 10 NC 17
Video (G)
4 Audio (G)
11 NC 18
NC
5
NC
12 NC 19
Video
6 NC 13 NC 20
NC
7 NC 14 NC 21
GND
NC: no connection
G Hours meter (on the bottom)
Indicates the accumulated time for which laser diode is on. Each seg-·
ment shows 1,000 hours, up to a total of 10,000 hours.
1-12

1-6. CONNECTIONS
If your monitor has a 21-pin CENELEC connector, video and audio signals
can be connected with a single cable. If the monitor is not equipped with
a 21-pin CENELEC connector, use a BNC-BNC coaxial cable for the video
signal connection and a cable with phono plugs for the audio signal
connection.
When the monitor is equipped with a CENELEC connector.
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Video monitor cable
VMC-2121CE (optional)
1-13

When the monitor is not equipped with a CENELEC connector
Monitor TV
LDP-1500P
BNC-BNC
video cable
(optional)
Align the slot with the projection.
Tighten the knurl.ed locking ring
by
turning it clockwise.
• To play back the audio on a stereo system, connect the LINE OUT
connectors to the auxiliary (or tape or tuner) inputs of the amplifier.
• Use the red plug of the audio cable for the right channel (R) connection.
1-14

1-7. TO PLAY BACK A VIDEODISC
The procedure outlined below deals with operation of the LDP-1500P when
it is used by itself. These operations are only possible when the unit is
not connected to an external computer (EXT CPU indicator is not il-
luminated). The optional RM-2001 remote control unit can be used in this
mode to control the player. Refer to the manual of the remote control unit.
Before starting the operation, keep in mind the following precautions.
• To open and close the disc compartment, press the OPEN/CLOSE
button.
• Place a disc in the tray with the side to be played back facing down
(with the label of the desired side up). Note that the laser reads from
below.
• If a disc is not placed correctly in the tray or the disc has a defect
which prevents normal playback, the disc compartment will
be ejected
as soon
as the defect is encountered.
1. Turn on the power of the videodisc player by depressing the POWER
switch.
2. Press the OPEN/CLOSE button to open the disc compart-
ment.
OPEN/CLOSE
1-15

3. Place the disc with the desired program label facing up.
Place in the indentation.
4. Press the OPEN/CLOSE button. The disc starts rotating and the lamp
on the PLAY button blinks for a few seconds. Playback begins
automatically when the lamp lights up.
To stop the playback
Press the PAUSE button. A still picture will be displayed on the monitor
screen for GAV discs, and the video picture will be muted for CLV discs.
If any function button is pressed, playback will begin in the selected mode
from the point at which the
PAUSE button was pressed.
To remove the disc
Press the OPEN/CLOSE button to stop the playing of the disc, no matter
what mode the player is in.
The disc will stop rotating, and the disc compartment will be ejected.
Notes
• At the beginning of the playback, the picture may be distorted. This
symptom tends to occur especially when a CLV disc is used.
• To avoid damaging the disc, do not move the videodisc player while
it is operating or while it contains a disc.
1-16

1-8. VARIOUS PLAYBACK MODES
HIGH SPEED PLAYBACK (GAV and CLV)
Keep one of the SCAN buttons pressed. The 8 button quickly advances
the picture in the forward direction and the 8 button advances it in
reverse. When you release the button, normal playback will be resumed.
~REV
Reverse direction ---~
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I{'3 FW!}- Forward direction
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Note: The picture of a CLV disc may be distorted in this mode.
CHAPTER STOP (GAV or CLV disc with chapter codes)
Display the chapter number by pressing the INDEX button on the remote
control and then press either of the SCAN buttons.
The S button locates the beginning of the next chapter and
the 8 button locates the beginning of the chapter being played back.
When the chapter stop activates, the still mode is obtained with a GAV
disc and normal playback will be resumed with a CLV disc. If you want
to continue the SCAN mode, keep the button again.
Note
Chapter stop code is not provided according to a type of videodisc.
1-17