Pioneer DR-U104X User manual

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@PIO NEER ®
The A rt of Entertainment
ORDER NO.
RRV1140
The chapter 1 of this Service Manual will not be reprinted. On your additional orders, we may supply only the
chapter 2. For the chapter 1, please make copies and attach to the chapter 2 at your side if necessary.
CD-ROM DRIVE UNIT
DR- U10 4X
THIS MANUAL IS APPLICABLE TO THE FOLLOWING MODEL(S) AND TYPE(S).
.
Model
Type
DR-U104X
Power Requirement Remarks
ZUC/WL
0 DC
power supplied from other system component
CONTENTS
CHAPTER 1 CHAPTER 2
1.1 SAFETY INFORMATION ··· .. ···· .. ······· 1- 2
1.2 SPECIFICATIONS ·· ············· ·· ···· ·· ···· 1-4
1.3 PANEL FACILITIES ······ ··········· ·· ·· ······ 1-4
1.4 DISASSEMBLY ································· 1- 5
1.5 ADJUSTMENTS ·· ·· ·························· 1-6
1.6 PARTS LIST FOR PACKING AND
2.1 PACKING AND EXPLODED VIEWS 2- 3
EXPLODED VIEWS ··························· 1- 8
2.2 SCHEMATIC AND PCB CONNECTION
DIAGRAMS ···· ·· ······· ········ ·· ·· ··········· 2-7
2.3 BLOCK DIAGRAM ······ ·· · ·············· · 2-25
PIONEER ELECTRONIC CORPORATION 4-1 . Meguro 1-Chome. Meguro-ku. Tokyo 153. Japan
PIONEER ELECTRONICS SERVICE INC. PO Box 1 760. Long Beach, Cal1 f orn1a 90801 U. SA
PIONEER ELECTRONICS OF CANADA, INC. 300 Allstate Parkway Markham. Ontario L3R OP2 Canada
PIONEER ELECTRONIC [EUROPE] N.V. Haven 1087 Keetbergl aan 1, 9120 Melsele. Belgium
PIONEER ELECTRONICS AUSTRALIA PTY. LTD. 178- 184 Boundary Road. Br aes1de, Victoria 3195, Australia TEL [03] 580-9911
© PIONEER ELECTRONIC CORPORATION 1994 T - DFI JUNE 1994 Printed in Japan

DR-U104X
CHAPTER 1
1.1 SAFETY INFORMATION
This service manual is intended for qu~lified service technicians; it is not meant for the casual
do-it-yourselfer. Qualified technicians have the necessary test equipment and tools, and have been
trained to properly and safely repair complex products such asthose covereq by this manual.
Improperly performed repairs can adversely affect the safety and reliability of the product and may void
the warranty. If you are not qualified to perform the repair of this product properly and safely, you should
not risk trying to do so and refer the repair to a qualified servicetechnician.
WARNING
Lead in solder used in this product is listed by the California Health and Welfare agency as a known reproductive toxicant which
may cause birth defects or other reproductive harm (California Health & Safety Code, Section 25249.5).
When servicing or handling circuit boards and other components which contain lead in solder, avoid unprotected skin cont ac t with
the solder . Also, when soldering do not inhale any smoke or fumes produced .
1- 2
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DR-U104X
(FOR EUROPEAN MODEL ONLY)--------------.,-----------~
VARO !-------------
A VA TTAESSA
O HITETTAESSA
JA SUOJALUKITUS
OLET AL TTllNA
NA KYMATTOMALLE LASERSA TEil YLLE.
ALA KATSO SATEESEEN.
AD V ERSEL : ---------- -
USYNLIG LASERSTRALING V ED ABNING
NAR SIKKERHEDSAFBRYDERE ER UDE AF
FUNKTION UNDGA UDSAETTE LS E FOR
STRALING.
VARNINGI ------ --- ---
OS YNLIG LASERSTRALNING NAR DENNA
DEL AR OPPNAD OCH SPARREN
AR URKOPPLAD. BETRAKTA EJ STRALEN.
LABEL CHECK
DRW1605
WARNING
LASER
Kuva 1
L as ersateilyn
va roitus merkki
LEAD IN SOLDER USED IN THIS PRODUCT IS LISTED AS A KNOWN REP RODUCTIVE
TOXICANT BY THE CALIFORNIA HEALTH AND WE L FARE AGENCY.
AL SO. CERTAIN E LECTR ICAL PARTS M AY CONTAIN CHEMICALS LISTED
AS K NOW N TO TH E S TA TE OF CA LI FORNIA TO CAUSE CANCER AND/OR
BIR TH DEFECTS OR O TH ER REPRODUCTI VE H ARM.
{CALIFORNIA HEALTH & SAFETY CODE. SECTION 25249. 5 I
FOLLOW MA NUFACTURER"S SERVICE INSTRUCTIONS AND U SE PRO P ER PRECAU TIONS.
127- 0718-00
DRW1617
WARNING! -- --- ------
DE V ICE IN CLUD ES LASER DIODE WHICH
EMITS INVISIBLE l t'J FRARED RADIATION
W HI CH IS DANGEROUS TO EYE S. THERE IS
A WARNING SIGN ACCORDING TO PICTURE
1 INSIDE THE DEVICE CLOSE TO THE LASER
DIODE.
------IMPORTANT - --- - -
THIS PIONEER APPARATUS CONTAINS
LASER OF C LASS 1.
SERVICING OPERATION OF THE APPARATUS
SHOULD BE DONE BY A SPECIALLY
INSTRUCTED PERSON.
LASER DIODE CHARACTERISTICS
MAXIMUM OUTPUT POWER: 5 mw
WAVELENGTH: 780 - 785 nm
LA SER
Pi c tur e 1
Warning sign for
l as er ra diation
DRW1606
Additional Laser Caution
1. Laser Interlock Mechanism
1) The ON/OFF (ON : low level, OFF : high level) status of
the SW801 switch for detection the loading state is
detected by the system microprocessor, and design the
prevents laser diode oscillation when switch SW801 is
not ON (low level) (clamped state).
Thus, interlock will no longer function if switch SW801
is deliberately shorted.
2) The interlock also operate in the test mode* .
Laser diode oscillation will continue, if pin 5 of IC302 on
Main PCB assembly is connected to Vee+ 5V (Pin 8)
(fault condition) .
2. When the cover is opened with the servo mechanism
block removed to be turned over, close viewing of the
objective lens with the naked eye will cause exposure to a
Class 1 laser beam.
*Refer to page 1- 6.
1-3

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DR-U104X
1.2 SPECIFICATIONS
[General performance)
Readable formats
(only 12 cm discs)
Transfer rate
Sustained
Burst
Data quantity (per block)
User data / block
Access time
Random access ( mean value)
Data buffer capacity
[Audio output part)
Line
[Accessories]
Disc caddy
Jumpers
Operating instructions
[Others)
Power supply '
External dimensions
(except for the front panel)
Weight
Operation temperature
Operation humidity
Storage temperature
Storage humidity
NOTE:
CD-DA
CD-ROM Mode 1
CD-ROM XA Mode 2
(form 1 & form 2)
614 k bytes/ sec (quadruple speed)
150 k bytes/sec (uniform speed)
2.5 M bytes/ sec (asynchronous)
4.0 M bytes/sec (synchronous)
2048 bytes (Mode 1)
2336 bytes (Mode 2)
220 msec ( quadruple speed)
256 k bytes
1.0V ± 0. 2V (10kQload)
1
3
DC + 12V, 2000 mA (Inc luding in-rush current)
DC + 5V, 650 mA (Including in-rush current)
146 (width) x 41 .3 (height) x 202 (depth) mm
5- 3/4 (W) x 1-5/8 (H) x 7-15/16 (D) in
1. 25 kg (2 lbs 12 oz)
+ 5°C to +40°C ( +41 °F to + 104°F)
5% to 90% (no condensation)
-40°Cto +60°C (-40°Fto +140°F)
5% to 95% (no condensation)
Specifications and design subject to possible modification without not fce due to improvements .
1.3 PANEL FACILITIES
REAR PANEL
1- 4
CD Audio output connector (AUDIO OUT)
Outputs the stereo analog signal. Connect to a sound board or audio amp, using a designated
connector .
@SCSI connector
Connect to an SCSI ho st adapte r board, using a 50-pin flat ribbon SCSI cable.
®Terminator block
Terminator resistance block for the SCSI bus. Remove when the terminator is turned OFF.
@Jumper pin switch
Insert into the attached short-circuit socket and set the SCSI ID number, parity, autofu nc ti on,
block size, and eject-disabled function.
®Power connector (DC INPUT)
Connect to DC + 5V and DC + 12V power sources.
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DR-U104X
FRONT PANEL
CD Front door/Caddy slot
Open the door and insert the disc caddy .
~ Emergency eject hole
® ® © ®
If the eject button does not function, the caddy can be removed by inserting and pushing a hard
cylindrical object into this hole. Turn the power OFF before doing this.
@ Eject button
Press this button to remove the disc caddy .
@B USY indicator
Lights up for about 2 seconds when the power is turned ON . Flashes orange during disc access
and is extinguished at all other times .
@P HONES LEVEL control
Adj usts the headphone terminal audio volume . The output level of the rear panel audio output
terminals cannot be adjusted .
1.4 DISASSEMBLV
• P.U. ASSY
@Headphones jack
Stereo mini-jack for connecting headphones .
1. Remove the mechanism assy from the unit and turn it around so the bottom is facing
you. Peel off the flexible cable that is attached to the mechanism assy with the
double-sided tape.
2. After removing the 4 soldered parts, remove the 4 screws CD.
3. By removing the 2 screws @ holding the linear holder (F) and the linear holder (R),
the P.U. assy can be removed from each pickup shaft. Then, after removing one side
of the rail rubber and pulling out the pickup shaft, only the P.U. assy will be left.
Double-Sided Tape
Flexible Cable
Mechanism Assy Bottom View
Note: When pulling the pickup out of the shaft or inserting it into the shaft, be careful
not to scratch the inner surface of the oilyless metal bearing. Also, make sure the
bearing does not get dirty.
Pickup Shaft
Linear Holder (F)
Screw ~
Linear Holder (R)
1-5

DR-U104X
1.5 ADJUSTMENTS
• This unit cannot be adjusted unless the commander is
used for making adjustments.
(1 ). COMMANDER
Since there are no connectors on the P.C. Board for
installing the commander, install "Nichiatsu" PH
connectors (IOP, 15P, 2mm pitch) on CN204 and CN205 on
the P.C. Board or take lead wires from CN204 and CN205
and connect them to the commander.
For details on using the commander, refer to "(3).
COMMANDER FUNCTIONS."
For normal speed play only, simple operation without the
commander is possible by using the player mode described
in theOperating Instructions. (Refer to thesection on Music
CD Playback.)
(2). LO SHORT CIRCUIT TERMINAL FOR
PROTECTING THE LASER DIODE
When removing the flexible wire from the P.C. Board or
removing the pickup or performing other similar
operations, always carry out an LD short beforehand.
First, turn off the power when the pickup is at its outermost
position. Turn the set upside down. You will see the pickup
P.C. Board LD short circuit terminal through the hole in the
bottom panel. Short here using solder.
After adjustments have been completed, make su re you
remove the solder.
(3). COMMANDER FUNCTIONS
(3) -1. Commander Functions (test mode "6")
when pin setting switch on the product
(DR-U104X) is in test mode ("6": ON)
Illuminated during
LED ON Electronic Subcode
VOL (min./sec.)
Illuminated during
'"~--4---4---4-------+--~ Focus UP
Sled Servo
ON/OFF
CLV Servo
ON/OFF
1- 6
0 0 0 0
Focus Search
Continuous
ON/OFF
TG2 ON
tt--- (CXD 1372)
TG1 ON
(CXD1372) 1
Quadruple Speed
ON/OFF
Press simultaneously
to reset
(3)- 2. Player Mode (test mode OFF)
FOK Monitor
GFS Monitor
Music No. Min . Sec. (HEX)
0
0
0
0
[Q]
[Q]
[Q]
[Q]
[Q]
888888
0
0
[Q] [Q]
PLAY P AUS E
o•u sico
SK IP
RE V
OM U SlC O
SCAN
RE V
D 0
0 0 0
0
[Q]
0
S TO P 0
OM USIC [Q]
SKIP
PW D
OM USIC [Q]
SC AN
PW D
0
0
[Q]
[Q] Quadruple
Speed
ON/OFF
Press simultaneously
to reset
(4). PIN SETTING SWITCH ON THE
PRODUCT (Short: ON)
Rear View
2 3 4
ID
During Test Mode:
5 6 7 8
Test Mode (ON)
Quadruple Speed (ON)
Pa ri ty (ON)
ID= 2 : Omin . 2sec. +-+ 20min. 2sec. search repeated
ID= 3 : Om in. 2sec. +-+ Readout time search repeated
ID=6 : Operating mode according to above-mentioned
+I -switches
ID= 4 : Random seek
Quadruple speed OFF (performed at normal speed by
removing short pin)
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(5). ADJUSTMENTS
1. Sled Offset Adjustment
Adjust the VR103 (SLD OFFSET) so that the DC voltage
between TP120 and TP121 to DC OV ± 0.25V.
2. Tracki ng Balance Adjustment
Adjust the VR301 (TE BAL) so that the center of the
waveform of the tracking error signal (TP304) when the
tracking is OFF is aligned with the center of the waveform
of the tracking error signal when the tracking is ON.
3. FE Bia s Adjustment
Adjust the VR302 (FE. BIAS) so that the jitter meter to its
smallest value.
4. Tracking Gain Adjustment
Waveform measurement poi nts : TP 107 (TE IN)
TP10 9 ( TE 2)
Input l.4kHz, lOOm V to the above measurement points apd
adjust VR101 so that the Lissajous waveform is
symme.trical about the X axis and Y axis. (refer to Fig. 1)
i
.! ••
DR-U104X
5. Focus Gain Adjustment
W avefor m m ea surement poin ts: TP110 (FE IN)
TP 138 (F E)
Input l. lkHz, lOOm V to the above measurement points and
adjust VR102 'so that the Lissajous waveform is
symmetrical about the X axis and Y axis. (refer to Fig. 1)
For th e gain adjustments in 4. Tracking Gain and 5. Focus
Gain, TRK ERR and FCS ERR waveform measurements
are made through a filter, as shown in the diagram below.
33k
ERR~ Oscill ator
1000p
~Standard voltage: 2.75±0.2V
(IC301, Pin 12, etc .)
Higher Gain Optimum Gain Lower Ga in
MAI N PCB U NI T
~ o
Fig. 1 Lissajous Waveform
.,...,.._,.
-
0
o "lll
MAIN PC B
VR103
u .f? w
TP121
0
0
TP120
1 27-5823-61 •MY ·Ol!lllJA
TP138
ll
-
0
VR102 9 :~ VR101
TP1091J,. ._
TP107
. !?
TP11 0
P".. "":--IC 301
VR3 0 2'-- ~ o TP304
,!.. VR 301
Fig. 2 Ad j ustment and Measu rement points
1-7

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DR-U104X
1.6 PARTS LIST FOR PACKING AND EXPLODED VIEWS (
NOTES:
• Parts marked by "NS P" are generally unavailable because they are not in our Master Spare Parts List.
• The Lt mark found on some componentparts indicates the importance of the safety factor of the part. Therefore, when replacing,
be sure to use parts of identical designation.
• Parts marked by "@" are not always kept in stock. Their delivery time may be longer than usual or they may be unavailable .
(1 ). PACKING (2) -
2. Mechanism Assy
Mark No. Description Parts No. Mark No. Description Parts No.
1 BAG DHL1096 1 REFLECTOR PCB
UNIT
DWX1555
2 SOCKET DKX1007 2 RELEASE SPRING DBH1263
3 OPERATING INSTRUCTIONS DRC1013 3 PICK LOCK SPRING DBH1264
(English, French, German, 4 RELEASE LEVER SPRING DBH1265
Japanese) 5 DAMPER V DEB1297
NSP 4 CD CADDY DXA1728
5 CUSHION R DHA1309 6 RAIL RUBBER DEB1299 (
7 PICKUP SHAFT
DLA1639
6 CUSHIONL DHA1310 8 PICKUP
SHAFT DLA1640
7 PACKING CASE DHG1610 9 LINEAR HOLDER F DNF1490
8 ACCESSORY CASE DHG1611 10 LINEAR HOLDER R DNF1491
9 POLY BAG DHL1094
10 POLY BAG DHL1095
11 HEAT SINK DNG1058
12 PICK LOCK PLATE
DNH1951
13 SENSOR I YOKE DNH1953
14 LINEAR I YOKE DNH1954
15 PULL PLATE
DNH1955
(2). CD-ROM DRIVE UNIT (DZW1015)
16 LOCK RELEASE LEVER DNK3007 (
17 SLIDE STOPPER
DNK3008
(2) -1. Exterior 18 SENSOR YOKE HOLDER F DNK3022
19 SENSOR YOKE HOLDER R DNK3023
Mark No. Description Parts No. 20 MECHA CHASSIS ASSY DXA1716
1 HEADPHONE AMP PCB UNIT DWX1556
21 SLIDE PLATE ASSY DXA1719
2 MAIN PCB
UNIT
DWG1456
22
SHUTTER ARM PLATE ASSY DXAl720
3 SCREW DBA1080
23
GEAR PLATE FULL ASSY DXA1721
4 FLOATING SPRING DBH1267 24 SPINDLE MOTOR DXM1070
5 CUSHION (LOWER) DEB1295
25
LINEAR COIL ASSY DXP1032
6 CUSHION (UPPER) DEB1296 26 SENSOR COIL ASSY DXP1033 (
7 DAMPER H DEB1298 27 SENSOR SIDE YOKE ASSY DXP1034
8 DUST COVER DEC1806 28 LINEAR SIDE YOKE ASSY DXP1035
9 COVER
PLATE
DNA1169 29 LASER IEC LABEL DRW1605
10
BOTTOM CASE DNA1170 30 LASER IEC LABEL DRW1606
11
FRONT VESSEL ASSY DXA1717 31 LINEAR M LABEL DRW1607
12
LASER IEC LABEL DRW1604
32 PICKUP ASSY- S DXX2224
13
SCREW BSZ26P050FMC 33 SCREW PMZ20P030FMC
14 EPROM (IC205) DYW1373 34 SCREW BSZ26P050FMC
NSP 15 CD-ROM DRIVE
UNIT
DZW1015 35 SCREW JBZ20P030FZK
16
TERMINATER RESISTOR DCP1072 36 SCREW BSZ26P040FMC
17 TOXICANT LABEL DRW1617
1-8

I
,
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Service
Manual
@PIONEER ®
The Art of Entertainment
ORDER NO.
RRZ1140
The chapter 1 of this Service Manual will not be reprinted. On your additional orders, we may supply only the
chapter 2. For the chapter 1, please make copies and attach to the chapter 2 at your side if necessary.
CD-ROM DRIVE UNIT
DR-U104X
CHAPTER 2
CONTENTS
CHAPTER 2
2. 1 PACKING AND EXPLODED VIEWS 2- 3
2.2 SCHEMATIC AND PCB CONNECTION
DIAGRAMS · .. ·························· .. ····· 2- 7
2.3 BLOCK DIAGRAM ............... ......... 2-25
PIONEER ELECTRONIC CORPORATION 4-1, Meguro 1-chome. Meguro-ku, Tokyo 153 , Japan
PIONEER ELECTRONICS SERVICE INC. P.O. Box 1760, Long Beach, California 90801 U.SA
PIONEER ELECTRONICS OF CANADA, INC. 300 Allstate Parkway Markham, Ontario L3R OP2 Canada
PIONEER ELECTRONIC [EUROPE] N.V. Haven 1087 Keetbergl aan 1, 9120 Melsele, Belgium
PIONEER ELECTRONICS AUSTRALIA PTY. LTD. 178-184 Boundary Road, Braeside, Victoria 3195, Australia TEL [03] 580-9911
© PIONEER ELECTRONIC CORPORATION 1994 T - DFI JUNE 1994 Printed
in Japan

DR-U104X I
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