Pioneer CLD-2850 User manual

Service
@ PIONEER’
The Art of Entertainment
PAZEVUED
ORDER NO.
CD._CDV LD PLAYER
CLD-
CLD-2850 HAS THE FOLLOWING :
ARP2787
Power Requirement
@ This manual is applicable to CLD- 2850/WEZ and WB.
For WB type, refer to page 75.
CONTENTS
1. SAFETY INFORMATION -
2. DISASSEMBLY
3. EXPLODED VIEWS, PACKING
AND PARTS LIST -
4, BLOCK DIAGRAM
5. SCHEMATIC AND
PCB CONNECTION DIAGRAMS ---
6. PCB PARTS LIST --
7. ADJUSTMENTS -
8.1C INFORMATION --
9. FOR WB TYPE---
10. CONNECTIONS -
11. PANEL FACILITIES
12. SPECIFICATIONS ----
PIONEER ELECTRONIC CORPORATION = 4-1, Meguro 1-Chome, Meguro-ku, Tokyo #53, Japan
PIONEER ELECTRONICS SERVICE INC. P.O. Box 1760, Long Beach, California 90801 U.S.A.
PIONEER ELECTRONICS OF CANADA, INC. 300 Allstate Parkway Markham, Ontario L3R OP2 Canada
PIONEER ELECTRONIC [EUROPE] N.V._Haven 1087 Keetberglaan 1,9120 Melsele, Belgium
PIONEER ELECTRONICS AUSTRALIA PTY. LTD. 178-184 Boundary Road, Braeside, Victoria 3195, Australia TEL: [03] $80-9911
© PIONEER ELECTRONIC CORPORATION 1993
IFO JUNE 1993 Printed in Japan

CLD ~ 2850
1. SAFETY INFORMATION
- VARO!
AVATTAESSA JA — SUOJALUKITUS
OHITETTAESSA = OLET —ALTTIINA
NAKYMATTOMALLE LASERSATEILYLLE.
ALA KATSO SATEESEEN.
r-~ (FOR EUROPEAN MODEL ONLY)
LASER
Kuve 1
Lasersateilyn
ADVERSEL:
USYNLIG LASERSTRALING VED ABNING
NAR SIKKERHEDSAFBRYDERE ER UDE AF
FUNKTION UNDGA UDSAETTELSE FOR
varoitusmerkki
WARNINGI
DEVICE INCLUDES LASER DIODE WHICH
EMITS INVISIBLE INFRARED RADIATION
WHICH IS DANGEROUS TO EYES. THERE IS
A WARNING SIGN ACCORDING TO PICTURE
7 INSIDE THE DEVICE CLOSE TO THE LASER
DIODE.
IMPORTANT.
THIS PIONEER APPARATUS CONTAINS
LASER
Picture 1
Warning sign for
laser radiation
STRALING. LASER OF CLASS 1.
‘SERVICING OPERATION OF THE APPARATUS,
SHOULD 8E DONE BY A SPECIALLY
SS ANING! INSTRUCTED PERSON.
OSYNLIG LASERSTRALNING NAR DENNA
DEL AR GPPNAD OCH SPARREN
AR URKOPPLAD. BETRAKTA EJ STRALEN
LASER DIODE CHARACTERISTICS —]
MAXIMUM OUTPUT POWER: 5 mw
WAVELENGTH: 780-785 am
LABEL CHECK
WEZ model
WB model
CAUTION
INVISIBLE LASER
RADIATION WHEN OPEN,
AVOID EXPOSURE
TO BEAM
ADVARSEL
LUSYHRIG LASenSTRALING VED ABKING AAR SiKERIED SAF.
DIVDRE ODE AF FLNRTION.
‘UNOGA UOGATTELSE FOR STRAUMG.
Avattaeasa Je suosaluxitus ohitert
ease olet alttiine nakyaattondl)
Aaversdtellylie. Ald hatao sAt
‘VAROING!
Osynlig laseratrdining mdr denna del
‘Ar Oppnad och sparren ar urkopplad.
Detrakta ej atrdlen.
‘VORSICHT?
LUWSICHTARE LASER STRAIRUNG THITT AUS, WENN DECHEL
{BOER ELF GEPIET aT HT DO STN. ler
oT
wens
PRW1018
\
WEZ and WS models
Additional Laser Caution
1. The ON/OFF statuses of the side~A/B detection switch
(TURN switch on the MECHANISM assembly), slider-position
detection switches (PARK 1, 2 and 3 on the MECHANISM
assembly) and loading-status detection switches (SW 1, 2
and 3 on SW board assembly} are detected by the micro-
processor (IC 101 in the MAIN board assembly).
‘To permit the laser diode to oscillate, it is required to set the
side-A/B detection switch for side A (IC101 In the MAIN
board assembly, pin 60 XTURN A=L and pin 61 XTURN B=H)
‘or the slider-position detection switch for the LD ACTIVE
status (PARK 1: OFF, PARK 2: OFF, PARK 3: OFF), and to
‘set the foading-status detection switch for clamped state (SW
4:OFF, SW 2:0N, SW 3:0N). (These requirements assume
that the shipping screws have been removed.) As long as
these requirements are not satisfied, the laser diode will not
oscillate, When the requirements are met in any way, the laser
lode can oscillate. The laser diode oscillation will continue if
the collector and the base of Q822 in the MAIN board
assembly are shorted to each other {fault condition),
In test mode * ; the taser diode oscillates when the
microprocessor detects a PLAY signal, or when the PLAY key
is pressed ($116 : ON in the FLKY assembly), with the above
WEZ and WB model
CLASS 1
LASER PRODUCT
. When the cover is open, close viewing through the objective
lens with the naked eye will cause exposure to a Class 1 laser
beam.
+ : Referto page 64,

CLD - 2850
2. DISASSEMBLY
1. Disc Tray
@Tum the power switch on and press the OPEN button
then pull the tray out from the player.
@®Remove two tray stopper screws ® .
@pPull out the tray toward the front.
Gear pulley
Front side
Fig. 2
Dise tray 2. Clamper Assembly
@Remove four screws@ to remove the clamper
assembly,
Fig. t
Note 1: How to open the tray by hand
@Remove two screws @ for tray stopper. (Fig. 1)
@Remove the front panel. (by loosening three screws at
the top side and a fixing screw of the earth lead.)
@Turh the gear pulley (Fig.2) counterclockwise by hand.
@aAfter the disc tray is lifted up and moved toward you,
pull out the disc tray toward you by hand.
Fig. 3

CLD - 2850
3. Carriage Assembly
@Slide the carriage assembly to the shaft of the turn plate
by hand.
Turn plate
Carriage assembly
Fig. 4
@Disconnect two connectors ®) and © from the CNNB
assembly to remove the flexible cable (Fig. 5).
@Remove six screws ® from the post(L) and (R) to
remove the tilt base.
@Pull out the carriage assembly by setting the tilt base
(upper) toward the upper( Fig. 6).
®Unhook two stoppers and remove a SW.
Unhook two stoppers 4
and remove a SW.
Note: Don't push down the tilt base
while removing screws.
Fig.5
Carriage assembly
‘Tilt base (upper)
Rear
panel
Post
Fig.6
@ How to repiace the flexible cable
tg
ut into the:
guide.
Fig. 7
4. How to install the cam gear
@Grease the cam gear. (Fig.8)
Apply a grease to the grouve
Apply a grease.
Fig. 8
@Move switch levers ® and ® (Fig.9) in the direction of
arrow® (SW is ON), switch lever© in the direction of
arrow @) and lever © in the direction of arrow © .
Switch lever 6)
@ h@ sien tever©)
ron
Switch lever @)
@*-—Fottow gear installation shaft
Lever ®)
Fig. 8
@nsiall the cam gear in the position where projection ®
of the cam gear comes to the front of the follow gear
installation shaft..

5. How to install the spring slanting cam
@ Grease the spring slanting cam. (Fig. 10)
@nstall the cam gear when the cam gear comes to the
position as shown in Fig. 9.
Apply a grease
Apply a grease to APPIY 2 atease tothe grouve,
the side.
NG
Apply a grease
Fig. 10
@nstall a nylon washer and an E ring, and hang the cam
spring on the hook. (Fig.11)
Note: The cam gear and spring slanting cam as shown in
Fig.11 are positioned when installing the slide cam.
Stop ring —@
ey
Follow gear
Nylon
washer
6. How to install the follow gear
@Grease the follow gear. (Fig.12)
‘Apply a grease to round
the gear.
Apply a grease to the
position without gear.
Fig. 12
@nstal! the follow gear where the portion of chipped
tooth of the follow gear come to the position as shown
in Fig. 13.
@nstall the stop ring. (Fig.11)
Triangle mark
Follow gear
Fig. 13
7. How to install the roller plate assembly
@Mount the roller plate assembly in the position where
the tooth with a triangle mark of the follow gear meshes
with the gap of the gear of the roller plate assembly.
(Fig.14)
Fig. 14