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
1
2
)-2 M
. echanism A
ssy
-
B
-
c
-
D
2- 5
..,
1
I
I
2 3 4
34
28
2 I 3 I 4
-,
lyJ___ 34
v 31
I
28
10
5
21
2
17
5 I
6
(
A
(
B
c (
D
6

I I 1 I 2
2. 1 PACKING AND EXPLODED VIEWS
Ir (
1). PACKING
'1 A
' (
8
7
~-
c
(
13
17
a
D
(
I 1 I 2
I
I
3 I 4
(2). CD-ROM DRIVE UNIT (DZW1015)
(2)- 1. Exterior
I
I
I
I
I
l
~
3 I . 4
I 5 I
DR-U104X
12~
0 9
A
-
8
14
-
c
10 -
~
' '
8
'
', e I
D
2-4
I 5 I 6 r

.. , ___ r __ _ 1 I 2 -, 3 I
(
I A
2.2 SCHEMATIC AND PCB CONNECTION DIAGRAMS
(1). MAIN PCB UNIT
e MAIN PCB UNIT (1 /5)
en
I
>-
(/)
(/)
(\1 co
a_ I
:::::> :r:
:::.::::0
(
iJ
MAIN PCB unit (1/5) (DWG1456)
. (+SCH-2) ,--------t--t-f-----------__...CK
1.--++-----------ji•Mg
LOON·-------,
1
RFO:!~==-E4~~=:;=~
'----++----------TRl<2 TCMF -
'-----++----------eFCS 1 TCl'15
'-----+t-----------FCS2
4 5
SCH-1
·r ~ ~
01
]
c----++--+-~~~~.~~&<i" ~ ToHEADPHONE
CH
7
l
_Q_ " ~ AMP PCB unit
~--+--+-~~~~~;
----_-_-_-+-+- --r-- ___,~ -=P'.tt~22,1ei~" J_ CN 801 ( +SCH- 6)
""~
··--- ....
DR-U104X
NOTE FOR SCHEMATIC DIAGRAMS (Type 4A)
1. When ordering service parts, be sure to refer to
"PARTS LIST of EXPLODED VIEWS" or "PCB
PARTS LIST".
2. Since these are basic circuits, some parts of them or the
values of some components may be changed for improve-
ment.
3. RESISTORS:
Unit: k:kQ, M:MQ, or Q unless otherwise noted.
Rated power: 1/4W, 1/6W, 1/BW, 1/10W unless otherwise
noted.
Tolerance: (FJ; ±1 %, (G): ±2%, (K): ±10%, (M): ±20% or ±5% un-
less otherwise noted.
4. CAPACITORS:
Unit: p:pF or µF unless otherwise noted.
Ratings: capacitor (µF)/ voltage (VJ unless otherwise noted.
Rated voltage: 50V except for electrolytic capacitors.
5. COILS:
Unit: m:mH or µH unless otherwise noted.
6. VOLTAGE AND CURRENT:
L:::J or -V •
A
~t
0
I-
(+SCH-4)
'-------++------------TRKl X1,X4 CHANCE.--------+-+--t--f--t++-----+--+---
TE•10t------,
CN402
R l
~~
]AUDIO OUT
DC voltage (V) in PLAY mode unless otherwise noted.
¢:i mA or - mA:
DC current in PLAY mode unless otherwise noted . -
(
8
-
c
(
D
(
I
.---------1o_·•_x_,,_,uu_.s_<c_" ___ ,_
0
:_::.~~~--=_-~=~~:::.~J-]
,---------A.MUTE
C340
0.047
EM303
NFM&lR30T'H2
C338
10/16
(' ~02
1
~NO
2 N
3 •
4 c
i fi~
7 L
e /
'\ ~
To SPINDLE MOTOR
CN701 (+SCH- 6)
R Rl04
C Cl 10 C340
IC ICl.02
0 D202
TR TRl
IP IPl
FB F'B3D4
EM EM30S
+lOV
SERVO PART
'--------TCMS
't===Es:~/>==l~~~F
~---~---FE
~------TE
'---------FOK!
C
n:sE========BACT F-
ACT F+
ACT T+
~-++---------1'1ACT T-
'-----------•VRlN-
'-------------VRlN+
4---------------llSPDL+
~--------------FC
SPDL GRIN
SPDL_.SUB
'-------------------i41~:MDS
MOP
MON
SLED
SPOL
[ 100)
~PART
,---------+-rt-f------+-+t--t--t-----+++-----SCOR
,----+--+--+------+-++---+--+-----+++--.SENSE
.--+----4-4~-----+-++-+---l----+++---.tg~~F
.-+::t==+========+==+=i:+=========+=+:t:==1f=::::+=======+++===IFOK
r----iE~~~
rt-+---t-----l--lt-t-t-----+-+t--t--t-------t+--1'1SQCK
MIRR CNG ... --++++t-+-----t--+++----,
14!!EJECT ....
:~:~;E~~~IIIII~~~;~-r---_~ll-+--+++-+----1-t+-+---+-----+--~-r-:~:CT-
11os oi~~ 4 l J r+---+--+++--+----+--++-+---+-----+---~~i AS
CLKj~~EEf~~F~1 r )(RST
DATAI '.J MIRR CNG
SE~~~ 1 ~i!c ~~~=~
'200J
~~~:i===t:l+'.J
~~g~
s~~~~
~--+--+-+---+--+-----+---1<0SlEO SUB INH
~+-+t--+-___,C-----+--SPOL SUB INH
C1"-M
EXCK.-----
MFCK...-----
seso...----
c2Po
~~~~ =52
EHPH
SUB INH
sue INH
~=+==+========::+=::::: 5i~~~Ef~w
~-+---+-----+---.!~~~[ S~G
~~~~~~~T~~
'----++----1---j-t-f---t-+--++-+-+--+--f-------_,.~=~~~
li~~S~A~~
SPDL F'G A. MUTE
:
~=i:tt=iti~~=ta=~~t:tt===t======:t---r-t:::==========~~~':11os SUB
SP.GAIN
(+SCH-3)
'ttt-t=+++================+===============::J:~i~11
A. SV
cs.sv)
vr11
Jj ~~~~
+l~V
IC101 TP~
Rl04 PQ20VZ11
68K R101
l04X 100 . SCH
TP102
t--<>
IP10~
2, 7A
MIRR-t-
,---+--o---'- 3 \JO VI ,_.-1.._..._.-+-~lDV'..l~W-+-~
l 0 c_
100
.. :r Lr{ v• ~ vc ~lo
Cl03 ~
C107
150/16 R103
20K
SCH-1
1
MAIN PCB UNIT (1/5)
I
150/16 ;;:~ T C101
T' ____.___ 0.047
~+---.--~.----, I
2
~~~~8CLK
CATA
LRCK
C2PO
Ef"IPH
~------H-+----------+---------1<0EXCK
'-t=========::+:i:+===========:if=::=========:::~~~~
L
~========a=t=============t========~=VSIN
SLED SUB
SPOL SUB
't================1~========~......,,,_~====1:~~~~0
IOCKO
'------------+----------+~•;~B~~
'------------f'IX1,X4 CHANCE
I~~~~~~ :
'-- - -------------------------MIRR
l04X200. SCH
I 3 I
Value in ( ) is DC current in STOP mode.
rv-h 4
7. OTHERS:
• © or 0 : Adjusting point.
: Measurement point.
A, SV
N 03
11
EJECT+ l
<;N~ ~
4 J
To EJECT MOTOR
• The & mark found on some component parts indicates the im-
portance of the safety factor of the parts. Therefore, when re-
placing, be sure to use parts of identical designation.
8. SCH-0 ON THE SCHEMATIC DIAGRAM:
• SCH - 0 indicates the drawing number of the schematic dia-
gram. (SCH stands for schematic diagram .)
5514 0.047
IDO------
IDl-----1 TDD ~
ID2----L_'.===i!R~l~:J j ~ ~
PART'r'-------~PrfA"'RH<T~Y-a ~ ~ ~
AUT o ___ __,1r=:::::=::BJ=Ru~!:Q:!i~ i1 i~
·1 K 13 14 ?-----1 i P02Dl
TEST . ~~!=>------1nh SMD100
BLOCl<-------'J - '
EJECT·------'
. TS~~~-1. C201
080-------
DBl.i-----·
J; ";);47/!G
SIGNAL ROUTE
SCSI
¢>:RF & AUDIO (DATA) SIGNAL
4 I 5
9. SWITCHES (Underline indicates switch position):
HEADPHONE AMP PCB unil
SW801 DISCSET SW
SW802 EJECT SW
SCH-1
MAIN PCB UNIT (1/5)
I 6
2-8
8
-
c
-
D
r

DR-U104X
e MAIN PCB UNIT (2/5)
(RF SECTION)
I 2
MAIN PCB unit (2/5) (DWG 1456)
3
+1 0V
C333
EM301
Q.047
.--~---.-~~.--~~~~~--.--~~-.~--.---c=r---'
-
8
-
c
-
D
[RF-AMP PART]
C301
(+ lOV)
R3 01
1SK
R302
1. SK
TR301
2SC2223
C303
1s,.
R303
100
R304
4.7K
r}:~,o
rBL=>~-i Q-'--3--- -----------+~---JI f-...._--t-7-...._+---K. ~~~~~23
.,....
I
:::r:
()
-en
.!:e. +
.,....
=~
c: a:
:::::J <X:
co a..
uc...
a..::::?!
z <X:
- I
<X: LL.
::::?! a:
0
~
<VC 2 . SV)
C+SV)
CG ND)
R R364
C C3 41
TR TR309
I C I C307
EM EM302
TP TP 303
0.01
R30S
10K
R3 06
470
IC301A : TRKG ERROR AMP. T
P3Cl4
TE
R360
10K
VR302
SOKB
A.SV
A. SV
C318
10/16
R364
24K
R363
10K
VR301 : TRACKING BALANCE ADJ.
R339
!DOK
R340
IC301B : FOCUS ERROR AMP.
R343
VR302 : FE BIAS ADJ.
R361
A.SV
R349
!SOK
R347 6.8K
R348 6.SK
~·~o MAIN: :: CB unit (1/5) RF-AMP PART (+SCH-1)
SCH-2
2- 9
1
MAIN PCB UNIT (2/5)
(RF SECTION)
I 2 I
R344
R307
1K
R308
4 70
A.SV
68
C 320
R332
47K
C 32S
1 0e
R346
10K
IC301C
C332
I
a .o47 I
R3SS Rf17
C32':'
22 / 6. 3
3
TP301
10/16
C309
0 . 01
R311
10K
R312 R3J.S
3.31< 120
R357
30K
C 335
I
313
R314
680 5 10
TR3 0 4
2SC2223
R317
31&
150
100
VDOA
C322
0 . 01.
R323
4.7K
4
RF AMP.
C310
C312
270p
VDDA
320
270
C3 14
1 s,.
R32 1
S&
C3l 3
270p
C316
10 / 16
TR307
2SC2223
C317
0.022
R322
1. 21<
5
SCH-2
•1.DV
EM302
NFM61.R30T472
.Arr
,. TP302
RF
R 0
IC 304: TRKG FAST COMPARATOR
C328
R338
2.21< TP303
TCMF
X4 C HANC
X1 L
X4 H
CHF
R358
6Be
C334
62K
47 00 p
R35~
62K
SIGNAL ROUTE
¢> : RF & AUDIO (DAT A) SIGNAL
TE
FOK
.,....
I
:::r:
(.)
en
+
-
~
a:
<X:
a..
0..
::::?!
<X:
I
LL.
a:
-
lO
-
.,....
-
-
c:
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co
(.)
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z
<(
::::?!
0
~
MAIN PCB UNIT (2/5)
(RF SECTION)
SCH-2
4 I
6
Waveforms
RF x 1 PL~ Y ( TP302 )
· ---"--t--r-.---+--t- fT i,
~- 0.5µs /div. _
11
BM .6 VIiie
RF x 4 PLAY (TP3 02 )
_ BM .5 VAC
TRKG ERROR
OPEN x 1 PLAY ( TP304 )
L __l _L_
CLOSE x 1 PLAY !TP 304)
f 1_v td iv .,
l_ L_
CLOSE x 4 PLAY (TP3 04 )
I
(
A
8
-<
c
D
I
(
(
\
-

(
(
(
-r- 1 I
IC401-IC403 TR401-TR404 IC210 IC214
IC103
2
IC212 IC201
IC105 IC116
I 3 I
IC2 17 IC202 IC207
IC215 IC206
IC307 IC306 IC110
IC304 TR307 TR305 IC303 IC104 TR306 TR308 IC114 IC108 I C1 13 TR201 TR202 I C1 12
IC107
A
B
-
c
D
I
IC109 IC302
IC301 IC305 TR301-TR304
VR101 VR303 VR301 VR102
MAIN PCB unit
1 I
VR302
To PU assy
2
VR103 VR104
To HEADPHONE AMP PCB unit CN801
I 3 I
4
IC203
IC208 I C209
IC117 IC216
IC111 I C1 15 TR203 IC10 2 IC10 1
I
IC2 04
I C 205
To EJECT MOT OR
To SPINDLE MOTOR CN 701
4 I
5
5
DR-U104X
•This diagram is viewed from the pink col-
ored foil side.
• This PCB is double side d.
AU DIO OUT
DC IN
2 - 12
I 6
A
-
B
-
c
-
D
r

X~OtU-flO
I
• This diagram is viewed from the gray col-
,
ored foil side.
• This PCB is double side.
TUO OIOUA
-
8
1282--~
-
0
-
!11180
a
2-13
-,
a I
a I
1>-os:n
cOSJI
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BOERT aOERT l>Ot::JI EOE::JI cOERT \OERT l>OEJI Ot t::JI aoEJI \OEJI
l>OERT- toERT cOE::JI 10EJI SOEJI eO!JI
1>01RV E01RV
SOERV S01RV t OERV EOERV 101RV
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a (
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---.
(
A
(
8
--{
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c
(
e MAIN PCB UNIT (3/5)
(SERVO SECTION)
Ito RF l lIW:>
It o V . SI
[SERVO PART]
IC107 : S.LED DRIVE
2 I 3 4
MAIN PCB unit (3/5) (DWG 1456)
R.L'i1 o.J
R 144 I la 4 . 7 1< ]
I 5 I
SIGNAL ROUTE
Q : RF & AUDIO (DATA) SIGNAL
DR-U104X
SCH-3
_n_ .. .. . . ,,._
=
.,.....
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l-
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C l 'i8 C.L 59
0 . 0 4 7 0 . 047
A
-
8
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1. 6 K ..J.__ij::j' A U 9 3 9 K 1
:~: ~ .;:::::::::::: : ::::::::::::: : ::: : ::::::: :: ::::: :::::= ~ ~~== , :~ , ~ ~ : ,1 :. = -;-~; ; 1o1 J • :~ ~~~~~~.--- - ~ ' ~ o• _ ~..._ -_.__,.,.. _ L'c,, ~ o ~ ,.~ ---------- - -- ----- - --- --ttt-t- -- ------ --- - ---- -- ----- -- ------- --- ----- -< .l ~ ' -" ' -'-'--~!Jl!: >
4 . 71( 34 1 411
..---+- --- · ___,J
-
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R R l OS -R.L8 7 C CONO )
C C l.1 1 - C 1 7 9
I C IC 1 03 - l C l.1.7
fP TP .13 7
VR VIU 0 4
C l'1 El 'll 0 1
SCH-3
1
MAIN PCB UNIT (3/5)
(S ERVO SECTION)
I 2
~
i.rc1 14 Q-l
TC4W(. f;,.
I 3 I 4
~---------~ - _i._ IC1 f- -'-'-i--------~rn;:~U
1
= ~6~ ~ ~z ; ~. ~ : F ~---- -- ------ ~ -< 7' H
~
~7K
I 5
MAIN PC B UNIT (3/5)
(S ER VO SECTION)
I
SCH-3
6
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2 - 16
-
D
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DR-U104X
e MAI~ PCB UNIT (4/5)
(AUDIO SECTION)
I 2 3
MAIN PCB unit (4/5) (DWG 1456)
--
...-
I
:I:
8(.)
CJ)
+
-
.....
a:
<(
0...
0
--
0
::::::>
<(
-
ll)
-
...-
-
-
c::
c::J
co
(.)
0...
z
<(
~
0
- .....
D
A. MUTE
[AUDIO PART]
TP4D1
TP403
TP402
R R421
C C421
TR TR'IO'I
IC IC403
TP TP407
SCH-4
A.SV
2-17
MAIN PCB UNIT (4/5)
(AUDIO SECTION)
..,
1 I
R4D1
1DCHI)
1DCHD
R4D2
•
T
1
2
3
4
C403
22/6.3
IC40
8CK IOR
lolS VREF
DATA IOL
GND VDO
TDA1545
8
7
6
s
C4DS
+111-2_v __ ___.. J? D. 047
R403
22K
R404
33K
C404 •
10/16~
C406
J? D.047
C'll7
R41S
47
Qp
SIGNAL ROUTE
¢> : RF & AUDIO (DATA) SIGNAL
2 I 3
4
TP404
TP406
I 4
C418
lDDOp
R416
10K
I
I
R4D7
R418
8 .2 K
R'll 7
!OK
5
IC403B
NJl'13414Al'1
5
+12V
TR404
RN2402
MAIN PCB UNIT (4/5)
(AUDIO SECTION)
I
6
I
\
A
SCH-4
-
...-
I
:I:
(.)
Cl)
+ (
-
.....
a:s
<(
0...
0
0
::::::>
<(
-
~--<
-
TP407
-
-
c::
::J
co
(.)
0...
~c
<(
(
~
0
.....
D
SCH-4
..._ ________ .......
6 I

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(
1 A
B
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(
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Cf)
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c:
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CD
(.)
a..
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<
~
0
I-
1
e MAIN PCB UNIT (5/5)
(SCSI SECTION)
2
MAIN PCB unit (5/5) (DWG 1456)
< CKO
TR 203
2 50 .1.626
1
""
to•
IC207 : SAAM
[SCSI PART]
SCH-5
MAIN PCB UNIT (5 /5 )
(S CSI SECTION)
1 I 2
r 3
I 3
I
I
4 I 5
SIGNAL ROUTE
¢> RF & AUDIO (DATA) SIGNAL
l C23'JI C2 "1 0 I C2 41 I C2 41 2 I C2 43
T 0.0 4 7[ 0 .0 4 7 I 0.0 4 7 I 0.0 4 7 I 0 .0 4 7
4 I 5
I
MA IN PCB UNIT (5/5)
(SCSI SECTION)
I
DR-U104X
SCH-5
J
R255
AZ'Eif. 4 7K
"o
--···
SCH-5
6
T"""
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I
(.)
Cf)
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Cf)
(.)
Cf)
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CD
(.)
a..
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0
I-
2 - 20
A
-
B
-
c
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D
r

DR-U104X
,- 2 I
-
8
-
c
-
D
(2). REFLECTOR PCB UNIT, HEADPHONE AMP PCB UNIT,
SPINDLE MOTOR AND PICKUP ASSY-S
PICKUP ASSY-S (DXX2224)
2-21
C12
0.04
R11
1 2k
_:AXA_
.,rr
·w··
SHORT
LAND
GND
--------1
LO
'
'
'
1
C11
0. 1
LD POWER
Q1
2SK217ZD
""' ~~.op A rJ, :~f: ~~/1f, f©'vRIN-
~-----{'V~--------4;}[1 '"V ~ iJry lvR I N+
"" C2 _l_o____. -"' ..--n !'U'I
-V 470p•-L
1'
~ro~~Cf\Lil h.'l.GND
. • -, ~ii'. Lil ~ 0:: " =
r-E"':-7----:=:~u"-- ~ ~--=---H-t-t-i-t-L::,.~-v:Tii.lqc.IRF
-v c3,_!l- a~~ VRIN-0-- · f'UI
470p ~ .g: ~GND
o:: ~ ">: VR I N+ J"3·
I J __ztz_ t@j+sv
C1 0 ,:b ,--, C9 ~NDJ GND ~;VC
.--+---0-.1-~rc_'I~~-o_.1_~ ~~RK
2
~-------------+-~~t-t---t---t---~~FCS1
rt-1-t--r-i---~fQJFcs2
; C7
-t-t---t---~~~RK1
r----f<CJl GND
, R3 4p !C1 ~
I G D 5. f,k C'' . N.JM20E>OM -~
~-+----~~'"--t---t---+--'7\."1\'1\1,;'N.,.._, '-er-' ,,!'
: 1 ~;, 1 lli ill~--+'-~~~_._..,~V.,S.A,.H
41 ~f-+---4:~--+-+-~ ~ Q Q k I + + I 12. 1 Q Q k
' 6 ] ~ .--r-rll---] ---+-
"-T--r-t-------t1t@fv D
'- 04 ~~r+--' -'-v""-E:-7--1 1=l~ ~ 10 R4
' -v _;;.u:. R5 _E , • + , ~i-=
9
--t-_2_2_o_k
~ j ~;:' 1J~ 'C ~r:-.,-.,,l~-~;---r-;--
-t-;-__,,1@ LD
t-----f@ GND
_z!z_ lf7\ +1 0 v
GND TV
HOLOGRAM ___ 22o 22p
LASER UNIT
lf2I SLD
~----~f\'.V ORV
j.(E;\KSJ SLD
~------,.,1~ RTN
TRK
~---,.,fe ACTF -
GND m ,----10 ACTT-
5.E>k
SLD ORV(\___ !'-=-'
FCS ACT 'J ~ACTT+
~
SLD RTN o----J f\V
.----1-----t--nL--'----lfi' ACTF+
ACT ~---,l ~
O'------------
R12-R27---CHIP JP (Ofl)
VR1-------VCP1053-A(47KO)
SIGNAL ROUTE
¢> : RF & AUDIO (DATA) SIGNAL
SCH-6
PICKUP ASSY-S, REFLECTOR PCB UNIT,
HEADPHONE AMP PCB UNIT,
SPINDLE MOTOR
1 I 2 I
3 I
- ~
I
I
(.)
Cl)
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~
0
v
z
(.)
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co
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0
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co
(.)
D...
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<(
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0
I-
3 I
4 I 5 I
HEADPHONE AMP PCB unit (DWX 1556)
~.sv
VR901
Volume
Voo
LD801 OR R810
'------ti~~~~--, lDDk
SW801
OISCSET St.l
SW802
EJECT SW
RB11
lOOk
A.5V
R804
Slk
• CB03
~ l.00/6 . 3
LB01C
C804 CM04RC02
R805
Slk
7
100/6. 3
CBOS
100/6.3
IC801B
NJM34141'1
RB07
100k
• CS 10
L801A
CM04RC02
JK801
GND
PHONE JACK
l 22/6.3
L8018
CM04RC02
_/VY"'-.
•
SPINDLE MOTOR (DXM 1070)
1
l__g_
3
-1.!<..!2.1
FRAME
FRAME
VCCl
FRAME r3 '"-0"------,
FRAME f-
2
~
9
=------1
6
SCH-6
+5v
R701 <
100 s
1
I
4 U
OUT
~
~ 1
C708. J 1=C709 ::::::::: ClO '"-+-+------'-1
0.047 0.047 0.047
+~ v
GND
28
~
~7 JL 8~8I
FC 1 r ~----'-<
~ ~:: ~_±J_~ J
4
o-;oI]
R706 (
13 <
rt7
V OUT
6 W
OUT
< R707 <) R708
( 13 13
7
RF
8
VCC2
~---~~v----~4
rJ
...2.
FG
IN-
...1.2.
FG IN+
_L
C7~2j ~-----t
o.1m
.---~
1
~
1
-1 FG OUT
+~ v ___!£....CR
Rj30k4 > ~ VCREF
R
705
t--+- ~ FRAME
lk ~FRAME
>
C704 <<)R703
220p lM
SA..,ulO
"T :""»l REF501
"°T --=~ N.JL5183KA-F10
R501
330
R503 CN501'
_ __lK FG OUT _.r:--
V IN-
24
-
VIN+~~ C706
I !___l_0.01
W IN-
22
-_L
W IN+ 121 --, C707
ll.__.1._ 0. 01
FRC f-'2 "-
0
"-----,
CD
19
vc
18
FRAME
..1-,-
FRAME
...1.§_
n
REFLECTOR PCB unit (DWX 1555)
PICKUP ASSY- S, REFLECTOR PCB UNIT,
HEADPHONE AMP PCB UNIT,
SPINDLE MOTOR
4 I 5 I
3
H701
HZ-106C-FT
1
I
4
o-; o• o
3
H702
HZ-106C-FT
1
I
4 +
0- ! O+ 0
3
H703
HZ-106C-
FT
R702 >
100
n
SCH-6
6
I
(
A
(
8
--{
-
c (
D (
I

11--- ...
( A
I
B
-
c
D
I
1
REFLECTOR PCB unit
CN702
SPINDLE MOTOR
CN701
To MAIN PCB unit CN102
To MAIN PCB unit CN103----..
l
_f
PICKUP ASSY - S
• This diagram is viewed from th e pink col-
ored foil side.
• This PCB is double sid ed .
1 I
2 I
DR-U104X
HEADPHONE AMP PCB unit
A
IC801
-
B
-
c
V R8 01
-
D·
2- 23
2 I 3 r