Pioneer DR-UA124X-2 User manual

@PIONEER ®
The Art of Entertainment
Service
Manual
CD- ROM DRIVE UNIT
.ORDER NO.
RRV1273
DR-UA 124X-2
DR-UA 124X-3
DR-UA 124X·5
(I
DE I NTE:£ffi CE\
Sl~G\-E UN \T )
.Dr< (\/E{2..s ~
THIS MANUAL IS APPLICABLE TO THE FOLLOWING MODEL(S) AND TYPE(S).
Model
Type
Power Requirement Remarks
DR-UA124X- 2 DR-UA124X- 3
DR-UA 124X-5
ZUC/WL 0 0 0 DC powersupply
CONTENTS
1. SAFETY INFORMATION······························ ··2
2. PACKING, EXPLODED VIEWS
AND PARTS LIST ····················3
3. SCHEMATIC AND
PCB CONNECTION DIAGRAMS ·..·..·· .. ······8
4. PCB PARTS LIST··..................................... 19
5. DISASSEMBLY ········································ 21
6. ADJUSTMENTS ······································· 22
7. IC INFORMATION····································· 31
8. BLOCK DIAGRAM··············· ············ ·········· 36
9. PANEL FACILITIES ························ ······· ···· 37
10. SP EC IFICATION ······································ 37
PIONEER ELECTRONIC CORPORATION 4- 1. Meguro 1-Chome. Meguro-k u, Toky o 15 3, Japan
PIONEER ELECTRONICS SERVICE INC. P.O. Box 1760 , Long Beach, California 90801 US.A.
PIONEER ELECTRONICS OF CANADA, INC. 300 Allstate Parkway Ma rkham, Ontario L3R OP 2 Canada
PIONEER ELECTRONIC [EUROPE] N.V. Haven 1087 Keetberglaan 1, 9120 Me lsele, Belgium
PIONEER ELECTRONICS AUSTRALIA PTY. LTD . 178 - 184 Boundary Ro ad, Braeside, Vi ctoria 3195, Au stra li a TEL: [phone]
© PIONEER ELECTRONIC CORPORATION 1995 T- IFY MAR. 1995 Printed in Japan

...
DR- UA124X- 2, DR- UA124X- 3
DR - UA124X- 5
1. SAFETY INFORMATION
This service manual is Intended for qualified 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 as those covered 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 service technician.
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 contact with
the solder. Also, when soldering do not inhale any smoke or fumes produced .
.- (FOR EUROPEAN MODEL ONLY)
r-V ARO'
£
AVATTAESSA
JA
SUO JALUKITU S
OH ITETTAE SSA
OLET
AL TTllN A
NAKYMA TTOM ALLE
LASERSATEIL YLLE.
ALA KATSO SATEESEEN. LASER
Kuva 1
La sersateil yn
.- ADVERSEL: va
roitu s merkki
U SY NLIG LA SERSTRALING VEQ ABNING
NAR SIKKERHEDSAFBRY DERE ER UDE AF
FUNKTION
UNDGA
UDSAETTELSE FOR
STRALING.
r VARNING'
OSYN LI G LA SERSTRALNING NAR DENNA
DE L
AR
OPPNAD
OCH
SP ARREN
AR URKOPPLAD BETRAK TA EJ STRALEN.
LABEL CHECK
AOVARSEL
CLASS 1 LASER PRODUCT
USYNLIG lASERS TRAllG VID AllNING NAR
S IKKERH!D SAFBRYOlll lR OOE AF FUNKTION.
~
UNDGA OOMTHlSI IOI SIRAllllG .
LASER KLASSE 1
VORSICHT !
UNS~HTBARE lASIR · IT!A Hl UNG TRITTAUS ,
Wl'NN DICXR IOOlR nAPPE) GlCFFNET IST I
NICHT DlM STRAll. lllSSIT1lN I
VARO I
CAUTION
A.v1tt.1t111 I• 1uojllt.i:.ltus ohltett11111
INVI SIBL E LASER
~!~!r:~:!W;1~ .
1
lilm:,':~
1
!~1111en .
RADIATION WHEN OPEN,
VARNING!
AVOID EXPOSURE
01ynliq l111r 1t rt \"Ji'IQ nl r d1nn1 del
TO BEAM
DRW1657
~~t~~~d
1
j~ ,. :t:r' " &r urkoppl 1d .
ZUC/WL model
\
REAR VIEW
ce::s I loo
oo l
2
r WARNING!
£
DEVICE INCLUDES LASER DIODE
WHICH
EMITS INVISIBLE INFRARED
RADIATION
WHICH IS DANGEROUS TO EYES. THERE IS
A WARNING SIGN ACCORDING TO PICTURE
1 INSIDE THE DEVICE CLOSE TO THE LASER LASER
DIODE.
Picture 1
Warning sign for
laser radi atio n
I MPORTANT
THIS PIONEER APPARATUS
CONTAINS
LASER
OF
CLASS
1.
SERVICING OPERATION OF THE APPARATUS
SHOU LD BE
DONE BY A SPECIALLY
INSTRUCTED PERSON
~LASER DIODE CHARACTERISTICSl
XIM UM OUTPUT POWER: 5 mw
VELENGTH: 780 - 785 nm
Additional Laser Caution ----- - -.
1. Laser Interlock Mechanism
The position of the switch (S902) for detecting loading
completion is detected by the system microprocessor, and
the design prevents laser diode oscillation when the
switch ($902) is not in CLMP terminal side (when the
mechanism is not clamped and CLMP signal is high level).
Thus, the interlock will no longer function if the switch
(S902) is deliberately set to CLMP terminal side. (if CLMP
signal is low leve l) .
In the test mode * the interlock mechanism will not
function.
Laser diode oscillation will continue, if pin 4 of TA2066F
(IC204) on the MOTHER board assy are connected to
GND, or pin 19 is connected to high level (ON), or else the
t er minals of 0206 are shorted to each other ( fault
condition ).
2. When the cover is opened, close viewing of the Objective
lens with the naked eye will cause exposure to a Class 1
laserbeam.
*:Refer to page 23.
(
(
(

I
1
(
(
(
2. PACKING, EXPLODED VIEWS AND PARTS LIST
NOTES:
•Parts marked by "NSP" are generally unavailable because they are not in our Master Spare Parts List.
• The .&, markfound on some componentparts indicates the importance of the safetyfactor 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.
•Parts list without notice are commonfor DR- UA/24X-2, DR- UA124X-3 and DR- UA/24X-5.
2.1 PACKING
(1) CONTRAST OF DR-UA124X-2, DR-UA124X-3 AND DR-UA124X-5
DR- UAI 24X-2, DR- UAI 24X- 3 and DR -UAI24X- 5 have the same construction except for the following:
Part No.
Mark No. Symbol & Description
DR-UA124X-2 DR-UA124X-3 DR-UA124X-5
I Pad L DHA1339 Not used DHA1339
I Pad Not used DHA1340 Not used
2 Pad R DHA1342 Not used DHA1342
NSP 3 Master carton DHG1638 Not used DHG1651
NSP 4 Packing case DHG1646 Not used DHG1653
4 Packing case Not used DHG1647 Not used
6 Polyethylene bag
Z21-016
Not used
Z21-016
8 Audio cord Not
Used Not used DKP3110
9 Polyethylene bag Not used Not used DHL1089
10 Screw Not used Not used PMA30POSOFMC
11
Plate Not used DHC1045 Not used
(2) PARTS LIST FOR DR- UA124X-2
Mark No. Description Part No.
1 PadL
DHA1339
2
PadR
DHA1342
NSP 3 Master carton DHG1638
4 Packing case DHG1646
NSP 5 Polyethylene bag
Z21-019
6 Polyethylene bag
Z21-016
7 Operating instructions DRC1021
(English/French)
Remarks
• Packing for DR- UA124X-2 and DR-UA124X-5
4
DR - UA124X- 2, DR- UA124X- 3
DR- UA124X-5
• Packing for DR- UA124X- 3
7
5
Fro nt
4

DR- UA124X- 2, DR- UA124X-3
DR- UA124X- 5
2.2 EXT~RIOR SECTION
Parts List
Mark No. Descrl~tlon Part No.
.1
A NSP l MOTHER board assy DWX1574
2
EP- ROM (ATAPI) (IC702) DYW1402
3 Tray name plate A (ABS) DAH1775
NSP 4 Top case DNC1394
NSP 5 Loading mechanism A assy DXA1741
6 Heat .sink DNE1291
7 Nylon rivet DEC-117
NSP 8 Bottom case DNC1395
9
-Front bezel assy DXA1748
B
-
<C{
15
c
-
D
5 1 I
2
Referto
2.3 LOADING
MECHANISM
SECTION
2
Mark
NSP
No.
10
11
12
13
14
15
16
17
8
I
Descrl~tlon
Eject knob
Front bezel
65 label
Screw
Short socket
Sheet
Label
Label
13---!
I
3
Part No.
DAC1823
DAH1780
DRW1659
BBZ26P080FMC
DKX1039
DEC1861
DRW1649
DRW1657
Put In the short socket
to SL pin (center) of
pin header.
SL
~
-----.
3
I
I
4 I 5
2.3 LOADING MECHANISM SECTION
Parts List
Mark No.
Descrl~tlon
Part No.
l Clamperassy DXA1752
2 Bridge DNE1288
3 Switch lever DNK3102
4 Lever switch (LOADING) DSKlOOl
5 Connector assy 3P DKP3103
6 Drive cam DNK3097
7 Loading gear DNK3101
8 Belt DE B1316
9 Washer WT21D050D050
10 Gear pulley DNK3099
2
12
17
~
4 I 5
I 6
Mark No.
Desc rl ~tlon Part No.
11
Motor pu ll ey PNW 1634
12 Drive gear DNK31
00
13 Load base DNK3086
14 Motor(LOADING) DXM1077
15 Tray DNK3087
16 Eject lev er DNK3103
17 Dr ive lever DNK3098
18 Screw IBZ26P060FMC
19
TS screw DBA1006
20 S cr ew
JGZ l7P030FMC
21 Servo mechanism assy DXB1552
Ref er to
2.4 SERVO MECHANISM SECTION
21
19
16
NOTE: Screws adjacent to T ma rk on the pr oduct
are used for disassembl y.
I 6
I
(
A
B
---( -
c (
D (
I

-
, ~
I 2.4 SERVO MECHANISM SECTION
Parts List
A Mark No. DescrlQtlon Part No.
1 Spindle mot
or assy- S DXX2266
NSP 2 Centering hub DLA1689
NSP 3
Ta bl e sheet DE C1871
NSP 4 Disc ta
bl e DNH2016
5 .. ...
6 ..
.. .
NSP 7 Magnet DNS
11 86
NSP 8 Spindle motor DXM1073
9 Pickup assy- S DXX2267
10
Gear spring DBH1286
11
Float ru bber DEB1315
12
Connector assy 4P DKP31 04
13 Connector assy I IP
DKP3105
B
[~
....I
-
C)J
c
~22
Top vi ew
24
Bottom view
D
I I
2
Mark
NSP
NSP
NSP
22
2
DR- UA124X- 2, DR -UA124X-3
DR- UA 124X- 5
A
No. DescrlQtlon Part No.
14 Sub guide bar DLA1665
15
Mechan is m base DNK3088
16 Motor pin
io n DNK3090
17
GearA DNK3092
18
GearB DNK3093
19 Guide bar PLA1094
20 Motor (CARRIAGE) DXM1077
....
21 Screw JGZl 7P030FMC
22 Screw PMA26P060FMC
23 Wash
er WT26D060D025
24 INSW unit DWS1246
25 Disc man DNK3089
B
-
c
D
7
I 3 r

-
DR- UA124X- 2, DR- UA124X- 3
DR- UA124X- 5
3. SCHEMATIC AND PCB CONNECTION DIAGRAMS
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 bHlc circuits, some parts of them or th•
values of some components may be changed for Improve-
ment.
3. RESISTORS:
Unit: k:k Q. M:M Q, or Q unless otherwise noted.
Rated power: 1/4W, 1/6W, 1/8W, 1/10W unless otherwise noted.
Tolerance:(F):±1%, (G):±2% , (K) :± 10%, (M):±20% or ±5%
unless otherwise noted.
4. CAPACITORS:
Unit : p:pF or µF unless otherwise noted.
Ratings : capacitor (µ F) /voltage (V) unless otherwise noted.
Rated voltage : 50V except for electrolytic capacitors.
5. COILS:
Unit : m:mH or µ H unless otherwise noted.
6. VOLTAGE AND CURRENT:
'[::J or -v:
DC voltage (V) In PLAV mode unless otherwise noted.
<=imA or ~mA :
DC current In PLAY mode unless otherwise noted.
Value in ( ) Is DC current In STOP mode.
7. OTHERS:
• © or~ : Adjusting point.
• <4 :Measurement point.
• The it mark found on some component parts Indicates the Im -
portance of the safety factor of the parts. Therefore, when replacing,
be sure to use parts of Identical designation.
8. SCH -0 ON THE SCHEMATIC DIAGRAM:
• SCH- O Indicates the drawing number of the schematic diagram.
(SCH stands for schematic diagram.)
9. SWITCHES (Underline Indicates switch position):
MOTHER BOARD ASSY
S701 :EJECT SW
INSW UNIT
S901 :DETECT SW
8
NOTE FOR PCB DIAGRAMS:
1. Part numbers in PCB diagrams match those in the schematic
diagrams.
2. A comparison between the main parts of PCB and·schematic
diagrams is shown below.
Symbol in PCB Symbol
in Schematic Part Name
Diagrams Diagrams
B c E B c E
~
1©J l©J
Transistor
BC E
B c E B c E
~
l©J
141
Transistor
BC E with resistor
D G s D G s
~
l@J 1@J
Field effect
D GS
transistor
.
(o o o~o oo)<l
mm
. Resistor array
loo ol
-g
3-terminal
regulator
(

... ,_ _....,-
1 I 2
I
(
---{
(
A
B
-
c
D
3.1 OVERALL WIRING DIAGRAM
REFL~
MIRROR ' -
-- --->
~
OBJECT I VE
LENS
PI CKUP ASSY -S
(DXX2267)
S902 DKP3
103
LOADING SW
(DSK1001 )
HOLOGRAM LASER UNIT
LTOH4GM 5
r- __ .J
: TRKG
F OCS
: COIL
CO i L
L - ---- - ---- - - - -- - ---- -
ACT UA TOR ASS' Y
.. : RF & AUD IO SIGNAL R OU TE
LOADING MOTOR
(DXM1077 )
E M+
EM-
SCH 1
WIRING
I
OVERALL
----·-- · DIAGRAM
I I 2
2
5
G
8
g
1
4
I 3 I
POWER
ATAPI HOST INTERFACE
4 I
DEV I CE
CONF IGURATION
JUMPER I
\!f AUDIO O UT
r-=--=--=--=-=--=-==--=--=---=---:=--=--=--=---,=--=- --=- ---::--~-=---=---:=--=--=-i
LPS1
GND I CN703 I
LPS2
vcc
VREF
GND
lcN20 1I
LD
GND
MD
vc
VE
VA
GND
VB
VF
ACTT+
ACTF+
ACTF+
I CN1 51
MOT HER B OARD ASS Y
(DWX 157 4)
0 12 : -.scH-2)
c2 12 : -t scH- 3)
ICN 751 I I CN50 1 I
I CN401 I
SLDF
SL DR
lNS W
G ND
W CO IL
V COIL
5
DR- UA124X- 2, DR- UA124X- 3
DR- UA124X- 5
IN SW UNIT
(DWS1246)
l s 901 IINSIDE SW
MOTOR COIL
DKP3 10 5
V CO IL
A
-
B
-
ACTT-
U CO IL 9)1- - -- --1( ~ ------__J
I CN501
B
R
JA501 VR501
D7 02
s 7 01
PHONES PHON E VOLUME BUSY IND ICATOR
EJECT SW
I 3 I 4 I
H-
W-
W+
v-
V+
u-
U+
H+
5
HALL ELEMENT
SP IND LE MOT OR ASS Y- S
( DXX2266 )
DI AGRAM SCH-1
c
-
D.
OVERALL I
WIR I NG
.._ ______________ .....
10
I 6 r

DR- UA124X- 2, DR- UA124X- 3
DR- UA124X- 5 2
3.2 MOTHE_R BOARD ASSY(1/2) AND INSW UNIT
1
A
-
B
-
c
-
D
I
I
u
Cf)
!
Cf)
'
>-
~
<l:
o._
INSW UNIT (DWSl 2 46 )
,--------------1
S4i~~~K-S
CN 201
522r.17-1e.q0
GND
VREF
V+SA
::::> VF l ~~t-t ------------~
t5 AC TT + IUt-t --- -1~ ---- ~
0:: AC TF + l6 ~!-t --- -4- -~- ~
ACTF- I09t-+----4~--+-~
ACTT-l ~~ t-t-~---l-t---t--1-+--'
LIN
;;;
I
&l DRCT
! ~~~~~~~r--~~1--~ --1-~~~~~ i-;J
VREF
I NSW
CN151 (2/2)
9047B-43Z01
F101
VTH1 033
y.,.50 V+SA
L 104
100'3
POWER [:
+12V
11
I I
MOTHER BOARD
Sc
·H-2 ASSY ( 1/2) ,
INSW UNIT
.._ ______________ .....
1 I 2
.
~
N
v
V+ SA
V+ SA V+SA
VR EF
I 3
V+5A
( .. SCH-3)
TCo.F
I 4
MOTH ER BO ARD AS SY (1/ 2)
(DW X1 574 )
I 5
.. : RF & AUDIO SIGNAL ROUTE
COF S
SPOA
SPCK
SBS Y
S FSY
DATA
6 I
A
•r=- _ -:::::: ::::::::::::::::::::::::::::::::::::::::::::::::::::_-_ -:: :::::::::::::::::::::::::: :: ::::::::::::::::::::========== =-=-=-=-=-~::- ;;z;
r----::::======-:----v:;:o.- ----- -~ V:;;;;:E~F----- - ------- 1--1--1--l--l--l-- - -+-+-I ==== ================= C2PO
VREF
C239
4 7/b. 3
OCH1074
~T:i ~T:i
u' 151 u' 151
VREF VREF
.Jr 'r'=~ "'------------- ~ ::: J(-+ SCH -3)
SL TP
I
VREF
SP IND LE
MOTOR
ASSY-S
( .. SC H-1 )
!SPINDLE DR IVEi
V+SA
3 I
V EF
V+ S
( .. SCH-3)
V+ 2 V+SA
4 I
( .. SCH-3)
MU TE
5
V+ SA
0&01
DTA 1 2 4E U
CG0B
10 /£. 3
V+ 1 2
G D
LRCK
AO UT
BCK
( .. SCH -3 )
HEAD PHONE JACK
.JA60 1
OKN 1 12 3
OTU••• PH ON ES
B
c
D
MOTH ER BOARD I I
AS SY (1 /2), SCH-2
IN SW UN IT
________________ .....
I 6 I
(
-
(
(

-I
I
DR - UA 124X-2, DR - UA 124X - 3
DR- UA124X- 5
Waveforms and Voltages of Mother board assy
CD
CD
®
®
RF-TP
0.5VI div. 0.5 µ S/ div
• Xl PLAY
- -~- --·- - - - ~ + ··-- --+ -~
RF - TP
0.5VI div, 0.1 µ S/ div
• X4 PLAY
• .. -- ·· ·- --·--- ---- · ...... .
'
CHl : FE - TP
1 VI div, 1 OOmS/ di v
CH2 : IC204-pin 13 CSBAD)
1VI div, 1 OOmS / div
·FOCUS IN
: ai -:- iM;t; ·----t "":""" -· ii · .a:.... : 1rhv - ,
: ~~· -f-
1
- ~" - - + - - --+- +· ·--t-· . +····i
~ ' • i;EILIL-r l -~
. : . ~·"• ·; ,, .... _.,
@ Ji;i;~F' T f ; -- -, --· --· ..
CH2 ~ 1 - - - ~- -- - : · - ---~ -- - -·! ·-· r ·· r ·-r . + ·- - -~ ---- · !
®
• · °' m..11' - --~ - - - - - ~ - - - ~ - - . .. ..·- - ~ - - ~ -· .. n... ~
: !!~T. :t ~ ~ ·"? _:_ ~· . , , ~9[!' ~ _g~~
FE -TP
0.5VI div, 5m S/ div
·FOCUS IN
®
FE-TP
0.5VI div, 5mS/ div
• FOCUS UP I DOWN
TE-TP
0.5VI div, 500 µ S/ div
• x 1 STILL
- -· ··- ·· - -· -- - - ....- ·- ···- ··- - -- ·- -- -·--
; cu ; ~~· -· '!....-• ; ll'~li · ;· 1
}-- - -+- -- -t -·--·f--·- t- ·+--·+· --+-· t·- -· +----1
. . .
TE - TP
0.5VI div, 500 µ S/ div
• x 4 STILL
- -·· ·-- ·---·- - -- -·-
, ..,. , ~ ; • !
~- -·· - ~ - - . -1 ,. ·- -- t- -· ~ t- . +
t
: -- + -r -· --+ ; --+ _.,, i--+- ·--t-·
TE - TP
0.5VI div, 1 mS / div
·X4 MULTI TRACK JUMP ( FWD )
--···- · ·- ---- --
: cu SI!-" i .. . ~
0
®
@)
CHI
®
CH2
0
®
®
®
®
CHI
®
CH 2
TE-TP
0.5VI div, 1 mS / div
·X4 MULTI TRACK JUMP (R EV )
--··-- --- ·-----...--
:- - • : '! - : 1191!""
... .
-.+-- -- --- -"+ -- -------
. ' ..
·- i
~i - - - -~-- --t~~r i 1-·--t ..
: ~uf't l . ~ J ~t j ;~ ~ : -GND
CH1 : TE-TP
0.5VI div, 50mS/ div
CH2 : IC501 - pin 22 (EC)
0.2VI div, 50mS/ div
• Xl PLAY
CHl : TE -TP
0.5VI div, 1 OmS / div
CH 2 : IC501 - pin 22 (EC)
0.2VI div, 1 OmS / div
• X4 PLAY
CHl : IC501 - pin 22 (EC)
lV / div, 50mS/ div
CH 2 : IC 2 03 -pin 7 (FGPL)
5VI div, 50mS/ div
• X1 PLAY
13

. ,--
DR- UA124X- 2, DR- UA124X- 3
DR- UA124X- 5
®
®
®
CHI
®
CH2
®
®
®
CHI
®
CH2
®
®
®
C HI
®
CH2
C H1 : IC501-pin 22 ( EC)
1VI div, 1 OmS / div
CH2 : IC203- pin 7 (FGPU
5VI div, 1OmS/div
· X4 PLAY
---·---------·-
" Clil 1-.V ; t ; • l .. t : IU. L!
7 f . Ml .i _ t.~~ --t--- -f-- t· i" . .+ .. f
CH1 : IC501-pin 22 (EC)
1VI div, 20mS/ div
CH2 : IC203- pin 7 (FGPL)
5VI div, 20mS/ div
· X4 SEARCH ( FWD 20--+40 minute )
CH 1 : IC501 - pin 22 (EC)
1VI div, 2 0mS / div
CH2 : IC203- pin 7 ( FGPL)
5VI div, 2 0mS / div
• X4 SEARCH
---- - ------- - ·..--
.... ·- ' .. ,
;. ~Mt L ! '
-··
~ ~- : l~ v
·+-·-1
IC204 (TA2066F) IC
30 I (TC9405F)
Pi n Vo lt age Pin
Voltage
No.
(V)
No.
(V)
Pin V
oltage
Pin
No.
(V)
No.
I 0 13 2.5 I 1.7
16
2 0 14
2.1
2 5
17
3 178m 15 2.1 3 5 18
4 4.4 16 2. 1 4 5 19
5 2.1 17 2.1 5 0 20
6 2
.1 18 2. 1 6 0 21
7 2.1 19
2. 1 7 0
22
8 2.1
20 2.1 8 0 23
9 0 21 0 9 0 24
10 2 .1 22
2.1 10 0 25
II 4.2 23 5
II
0 26
12 4.2 24 0 12 5 27
13 0 28
14 -29
15 -30
14
@
CHI
CD
CH2
@
CHI
CD
CH2
Voltage Pin
(V}
No.
5
31
0 32
-33
-
34
-35
-36
-37
5 38
5 39
5 40
-
41
5 42
2.1 43
2.1 44
0 45
CH1 : TE-TP
1 VI div, 20mS/ div
CH2 : IC401 - pin 18 (SLOUT)
2VI div, 20mS/ div
·X4 SEARCH (FWD 20--+40 minute)
CH1 : TE-TP
1 VI div, 20mS/ div
CH2 : IC401 - pin 18 (SLOUT)
2VI div, 20mS/ div
·X4 SEARCH (REV 20--+40 minute)
CH1 : TE-TP
1 VI div, 50mS/ div
CH2 : IC401-pin 18 (SLOUT)
2VI div, 50mS/ div
·X4 SEARCH (FWD FULL STROKE)
Voltage
Pin
Voltage
Pin Voltage
(V)
No.
(V)
No.
(V)
1.6 46 2.1 61
5
0 47 2.1
62 0
4.2 48 2.1 63 0
1.4 49 2.1 64
5
0 50 4.2
65
0
1.6 51 2.1 66 -
2.1
52
2.1
67 5
5 53 0 68 5
0 54 2.1 69 0
2.1
55
2.1 70
0
2.1 56
2.1
71 0
1.2 57 2.1 72 0
1 58 5 73 0
2.1 59
5
74
5
2.4 60
5
75
2.5
Pin
No.
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
@
CHI
CD
CH2
®
®
CHI
®
CH2
®
®
®
CH2
Voltage
(V)
0
5
2.5
-
0
0
-
-
-
-
5
0
5
5
5
CH1 : TE - TP
1V/div, 50mS/div
CH2 : IC401 - pin 18 (SLOUT)
2VI div, 50mS/ div
·X4 SEARCH (REV FULL STROKE)
CH 1 : IC501 - pin 22 (EC)
1 VI div, 50mS/ div
CH2 : IC203- pin 7 (FGPL)
5VI div, 50mS/ div
·X4 SEARCH (FWD FULL STROKE )
CH1 : IC501-pin 22 (EC)
1 VI div, 50mS/ div
CH2 : IC203- pin 7 (FGPL)
5VI div, 50mS/ div
CH2
-GND
·X4 SEARCH (REV FULL STROKE)
Pin
Voltage
No.
(V)
91
0
92 5
93 -
94
0
95 -
96
-
97 5
98 5
99 5
100 5
c
(
(
(

I I I 2
A
I
LOADING
SW
B
-
c
D
PHO NES
I I 2
DR- UA124X-2, DR- UA124X- 3
DR- UA124X- 5
SP IN DLE
MOTOR ASSY- S
0602
060 3
I C702
IC8 55
I C703
IC707
I
I C709
IC 8 53
IC70 1
060 1
IC8 51
I C60 1
IC713
IC30 1
0 2 06
I C204
I C202
IC2 05
I C20 3
04 01
I
0 403
I C50 1
I C404
IC 40 2
06 19
070 2
I C40 1
0620
I C405
IC 60 2
070 1
• This di agram is viewed from the pink colored foil side.
• This PCB is double sided.
15
I 3
A
-
B
-
c
-
D
r

-C
-X~StAU -RC ,S -X~StAU -Ra
a -X~StAU -Ra
A
-
8
-
J
-
a
I
s oao
rnao
SO'\:)I
ccB:)I
C:O'\ :)I
'\O'\JI
I
eo'\:)1
c:cs:)1
10'\:)1
1oao
1cs:)1
1oaJ1
C:l'\:)I
IOC::)I
aoso
J:>OS:)I
SOS:)I
cOS:)I
COS:)I
IOJ:>O
I
c:oi:-o
IOc:)I
J:>OJ:>:)I
SOJ:>:)I
e1ao
SO'\O
IOJ:>:)I
osao
cOJ:>:)I
soa:)1
10'\0
16
3JOV1192
2 - Y22A S10TOM
• This diagram is viewed from the gray colored foil side.
• This PCB is double sided.
E I
I
(
A
8
...... ( -
J (
a
'-'------'---"
C)VllOAOJ
23VIOH9
(
S10TOM
I I

__ , __ r T
3.3 MOTHER BOARD ASSY(2/2)
1 A
I
(
B
-
c
(
D
I
MOTHER BOARD ASSY (2/ 2)
(DWX1574)
GNDD
V+SA~
e-
~ ~
BUSY LED SI
EJECT SW
v+so v+so
~l"
2
l"
u s u s
G D G D
V+SD
~p;
GNDD ~D
BUSY
EJECT
LP51
LP52
LOADING r O--~·~c ""~~~~-- ----~P ,.,..] C.,.SCH -2)
MOTOR ,... :!: EM--
(-+SCH-1 ), EM-
1 I
2
V+SA
2
I 3 -, 4
C.,.SCH-2)
~
0:0:0:0.-
~§~~
~
V'l<llV'l<JI
eee.e
~
>•
• u
~~
• u
<
..
I~ ( .. SCH-2)
~
~~x~ uu
N Cl U 0 B
u ...J Cll Vl
······~·-··
0
1·1·1·1··~
~~~~~~~~~~~~~~~~~~
RA11 a:
LCB951 7VJW
V+SO
i ~ ~ ~ ~ ~ i ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ x ~ ~ l""-t"f~S."¥17.-ir'f--+-_,...ri::
BUSY -LEO
SYSTEM RESETf'-'-+-+ --~~c+~--+- =-+--- ---+----+-~
I
~--------------<~+--+-f---.J' -=~ ~~
BVS1
~------------------>--+-~"'..BUS 0
3 I
G D IC702
DYW1402
(DSPJ
IDSP)J
{DSP) c .. scH-2)
(DSP}
4
HD
G D
I
5
IC855
W02SC32
DR
DR
ATAPI l/F I
CN751
':llZl22B-06C
MA
SL
5
l
DEVICE
CONFIGURATION
JUMPER
GNDD
UA124X- 2, DR- UA124X- 3
UA124X- 5
"""
V+ D V+SD
LE
MOTHER BOARD
ASSY (2/2)
I 6
HOB?
HOBE.
HOB4
HOB11
HDB3
HDB12
HOB2
HOB13
HOB1
HOB14
HOB0
HOB1 5
GNDD
N.C.
DMARQ
GNDD
DION
GNDO
DIOR
GNDD
IORDY
HCSEL
°""CK
INTRO
IOCS1E>
""
POl/l<G
HA2
CS1FX
CS3FX
DA.SP
GNDD
CN151 (1/2)
90418-43ZIZl1
SCH-3
18
A
w
u
4:
LL
er:
w
t-
~
t-
U)
0
I
a::
-
4:
t-
4:
B
-
c
D,
r

.l
DR- UA124X- 2, DR- UA124X- 3
DR- UA124X- 5
4. PCB PARTS LIST
NOTES:
e Parts marked by "NSP" are generally unavailable because they are nat in our Master Spare Parts List.
e The Lt, markfound on some component part s indicates the importance of the safetyfactor of the part . Th erefor e, when replacing,
be sure to use parts of identical designation.
e Parts marked by"@" are notalways kept in stock. Their delivery time may be longer than usual or they may be un av ailabl e.
• When ordering resistors, first convert resistance values into codeform as shown in thefollowing examples.
Ex.I When there are 2 eff ective digits(any digit apartfrom 0), such as 560 ohm and47k ohm(tolerance is shown by 1= 5% , and K=1 0%).
560 Q --+ 56 X JO / --+ 561 ••oo• • • •oooooo • •• • • OOOO••••••oo••••••••ooooooooooo RDJIBPM~[§] OJ J
47k Q --+ 47 x J O' --+ 473 .. ...... ...... ... .. ............................... RD1 / 4PS@][l]~J
0.5 Q --+ ORS .... .... ........ .. ...... .... ... ..... .......... ...... . ........ ...... RN2H[QJ(B]~ K
J Q --+ 010 .. .. ... .... .... ... .......... .... ...... .. .... ... .. ......... .... ...... RSJP[QJ [j][QJ K
Ex.2 When there are 3 effective digits(such as in high pr ecision metalfilm resistors).
5.62k Q --+ 562 x 101 --+ 5621 .... .. ............ .. ........... ..... ...... RNJ/4PC~[§] [2] 0JF
Mark No. Description
LIST OF ASSEMBLIES
NSP
NSP
MAIN E ASSY
t
INSW UNIT
MOTHER BOARD ASSY
INSW UNIT
SWITCH
S901
OTHERS
C N901 KR CO NNEC TOR
MOTHER BOARD ASSY
SEMICONDUCTORS
19
IC702
IC20 3
IC 401
IC 5 01
IC 85 1
IC 8 53
IC 713
IC602
IC701
IC 204
IC404
IC 707
IC 708, IC709
IC 703
IC 3 01
I C8 55
IC 2 05 , IC40 2, IC40 5, IC601
I C2 02
Q401
Q206
Part No.
DWM1490
DWS1246
DWX1574
DSG1048
S4B -PH-K
DY W1402
BA10393F
BA6797FP
BA6840FP
KM681000BLG-7
LC895170ll'
M51953 BFP
NJM3415M
MB90T678
TA2066F
TC4ll'53F
TC74H C 138AF
TC74HC573AF
T C7S04F
TC9405F
ll'D25 C 32
XRA4558F-P
XRA4560F
2 SA1576A
2S B11 89
Mark No.
Descrl~tion
Q602,Q603,Q 6 19,Q620
Q402 , Q403,Q 60 1
Q701,Q70 2
D702
COILS AND FILTERS
F301 , F601 , F602,F851,F85 2
L301
Ll04 , L601 ( 22 µ H)
L602,L603
FlOl, Fl0 3
SWITCH
S701
CAPACITORS
C314
C302
C4 27
C 861
C3 16
C428
C601 , C604
C222 ,C228 , C7 13 ,C7 14
C244
C60 2,C60 3, C60 5, C 606
C501 - C5 03,C617
C60 7,C 608
Cl05,C609,C610
C424
C510
C2 31
Cl07
C404
C2 41 , C407
C315,C720
C227 , C230 , C304- C3 07
C711, C71 2
C309, C 310,C 4 14,C415, C5 12
C 42 6
C506, C5 08
Part No.
2 SC4081
D TA 1 24EU
D TC 1 24EU
SLB - 25 Y YTB7
DTH11 22
DT L1 0 15
OTL1009
OTL10 40
VTH10 33
DS G10 49
C CS RCH10 0D 50
CCSRCH101J 50
CCSRC H1 5 1J 50
C CS RC H181J 50
CCS RC H220J50
C CSR C H271J 50
C CSRCH 33 0J 50
CCSR CH39 0 J50
C CS RCH 47 0 J50
C CS R CH820J50
C EAL 10 0M l6
CEAL10 0M6 R3
CEAL101M6R3
C EAL22 0M l6
CE A L47 0M l6
CEAL 470M 6R3
C EAS101Ml 6
CEV470 Ml6
CEV4 70M6 R3
CKSRYB 1 02K50
CK SRYB 10 3 K50
C KS R YB 1 03K50
CKSRYB 153 K 50
CKS RYB223K 25
C KS RYB82 2K 50
Mark No. Description
C l01 ,C l0 3, Cl l2, C201, C2 02
C 23 8, C242 ,C 243,C245 ,C246
C 30 1,C 303,C3 08,C31 2
C321,C32 2,C 390,C 4 03,C 416
C419,C4 23,C 42 5, C 504,C 505
C511 ,C 611, C612 , C61 8
C70 1-C 70 4 ,C715 , C71 8,C72 1
C83 1 ,C 832 , C85 1- C85 3
C405 ,C 41 7 ,C 418,C7 10
C3 11
C239
RESISTORS
R2 53(2 2Q )
R403 ( 1. O Q)
R5 0 6, R507 (0. 4 7Q )
R276, R7 42
R2 01 ,R202, R 867, R 873
R31 7 ,R323, R7 43 ,R 74 4, R86 6
R868
R429, R4 32
R40 2, R4 41-R 44 3
R2 44 ,R2 45,R 27 5,R 30 2
R3 07 ,R 308 , R4 30 ,R4 31 ,R5 14
R533 ,R 537 ,R 705 -R 707
R71 3,R 7 14 ,R727-R 73 0,R73 2
R73 6, R738 -R74 0, R 746 ,R 747
R8 69 -R872
R2 46, R254 , R272 , R613, R614
R 72 5
R502-R 504
R2 78
R408,R 436
R 27 4,R324
R 409,R 453
R 23 2, R236,R 26 6,R26 7, R 28 0
R73 7
R 231,R 23 3, R 460,R633
R4 58, R4 59
R4 26 ,R 4 27
R 30 3,R 437
R2 47, R5 36 ,R 62 1
R3 13
R3 04
R309
R 424, R425, R 605 ,R 606
R 611, R 61 2
R305
R 461
R2 79,R312
RS Ol, R5 10
R3 18, R448, R4 49
R30 1, R 538
R86 2- R 86 5
R 31 1
R 44 4- R4 46,R 454 ,R4 56, R45 7
R264 ,R 46 2,R6 01 - R604
R6 07 -R 610
Part No.
CKS RY F1 0 4Z 25
CKS RYF1 04 Z25
CKSRY F1 04 Z25
CKS RYF1 04Z 25
CK SRY F1 04 Z2 5
CKS RYF1 04 Z2 5
C KS RY F1 0 4Z 25
CK S RY F1 04 Z2 5
C KS RY F4 7 3Z 25
CK S YF 1 54Z 25
DCH1 07 4
DC Nl OSO
DC N 10 51
OC N10 24
RS 1/ 16 S OO OJ
RS l/ 16 SlOOJ
RS 1/ 16S l0 1J
RS 1/16 Sl0 1J
RS1/16S l0 2J
RS1 / 16 S l0 3F
RS1 / 16 Sl03J
RS 1/ 16 Sl03J
RS1 / 16 S l0 3J
RS1/ 16 S l0 3J
RS 1/16 S l0 3J
RS 1/16 S l0 3J
R S1 /1 6S l0 4J
RS 1 /1 6S l0 5J
RS1 /1 6S l 20 J
RS1 /16 Sl5 1J
RS1/ 16S l53F
RS 1/1 6Sl53J
RS 1/1 6Sl 62 F
RS1/16Sl63J
RS 1/1 6S20 1J
RS1/ 16S2 02J
RS 1/16S 20 3F
RS 1/1 6S 20 3J
RS 1/16 S20 4J
RS1/16S 222 J
RS1/ 16 S 22 3J
RS 1/ 16 S 225 J
RS 1/ 16 S302J
RS1/ 16S3 03J
RS 1/ 16 S303J
RS 1/ 16S33 3J
RS 1/ 16 S392F
RS1/16S 392 J
RS1/16S470J
RS1/16S472J
RS 1/1 6S473J
RS1 / 16S5 10J
RS1 / 16 S51 1J
RS1 /16S 51 3F
RS1 / 16 S513J
RS 1/1 6S 51 3J
Mark No.
Desc rl ~tlon
Part No.
R61 7 ,R 61 8,R 631 ,R632 RS1/1
6S 56 1J
R450 ,R 45 2 RS1/1
6S 56 2F
R422,R 423
RS1/1 6S 562 J
R447, R451 RS1/16S
622 J
R43 8 RS1/16S
68 3J
R 45 5 RS1/16S7
52F
R51 3 RS1/16S7
53 J
R2 56- R25 9 RS1/16S
822 J
R 260,R26 1 RS1/1
6S 823F
VR6 01 (47kQ)
DC S10 29
VR 201(2.2kQ) PCP
10 25
OTHERS
CN601 C ON NEC TOR 1036 72 -3
CN201
FL EXI BL EC ONN ECT OR 522 07-1 69 0
C N7 51 P IN HE AD ER (6P)
90 22 B- 06C
CN 151 ATAP l/CONN EC TO R 90 478- 432 01
X 301 C RY S TA L RES ONAT OR
A SS 7 000
( 33 . 8688 MH z± 700 PPM)
C NS Ol CO NNE CTO R llP BllB-ZR-S
M3
CN 401
KR C ONNEC TOR
B4 B- PH -K (
X70 1 CERAM ICOS CI L LAT OR ( 4M Hz)
CS AC 4. 00M GC M
IC SOCKE T (40P)
DKH1 01 6
JA601 M IN I JA CK
DK N1123
CN703 CONNEC TO R3P S
3B - ZR -S M3 A
(

l
I ( .
5. DISASSEMBLY
5.1 DISASSEMBLY THE FRONT BEZEL
ASSY
• Open the tray
l. Make the key by using clip etc.
(It may use to the metal stick which is extent of Imm in
diameter and 50mm long.)
2. Open the door by moving the eject lever which is
inserted the key to the hole in vertically and pressing it
as show n in Fig. 5- 1.
3. Unhook the two hooks of the tray name plate.
• Remove the bottom case
1. Remove the five screws CD to remove the bottom case.
• Remove the top case
1. Be careful of the hooks (right and left) of the front bezel
assy.
bezel
assy
DR - UA124X- 2, DR - UA124X- 3
DR- UA124X- 5
Eject
lever
~Upper side
Clip
\
Bottom case
Front
bezel
assy
Fig. 5-1 Disassembly (Bottom view)
21

-
DR- UA124X- 2, DR - UA124X- 3
DR- UA124X- 5
6. ADJUSTMENTS
22
6.1 Adjustment Methods
If a disc player is adjusted incorrectly or inadequately, it may malfunction or not work at all even though there is
nothing at all wrong with the pickup orthe circuitry. Adjust correctly following the adjustment procedure.
e Adjustment ltemsNerification Items and Order
If the specified values cannot be obtained or no adjustment is possible by performing the veri fications or adjustments
described in steps I - 3, the pickup block may be defective.
Step Item Test Point
1 Focus offset verification FCS.ERR
2 Tracking error balance verification
IRK.ERR
3
RF level adjustment (RF level) RF .
Note : The digital servo IC (TC9405F) being used in this set has the following
functions and does not provide focus offset, focus servo loop gain and
tracking servo loop gain adjustments.
I. Average function
For accurate servo control, FCS. ERR and RF average measurements are
perfonned and the measured values are compensated through a
compensation circuit.
Thus, volume control for FCS. OFS adjustment is not provided.
2. Auto gain control function
The gain inside the filter is automatically adjusted to obtain a proper gain
in the servo loop. Th is function pennits the optimum gain to be obtained
on each disc.
Thus, volume controls for FCS. GAIN and TRK . GAIN adjustments are
n ot provided.
The gain adjustment is done before TOC reading.
•Measuring Instruments and Tools
I. Dual trace oscilloscope ( 10: I probe)
2. Test disc (YEDS -7)
3. Standa rd tools
Adjustment Location
None
None
YR201
•Abbreviation table
FCS. ERR
IRK.ERR
FCSGAN
TRKGAN
FCS. IN
IRK.IN
:Focus Error
: Tra cking Error
:Focus Gain
:Tracking Gain
:Focus In
:Tracking In
(
(
(
(

-
(
,I
DR- UA124X-2, DR- UA124X- 3
DR- UA124X- 5
6.2 FUNCTION TABLE OF THE REMOTE CONTROLLER (RU-V101) FOR SERVICE
•Test mode
Shows the function table of the remote controller (RU-VI0I) for service as follows. When operating the CD-ROM
directly, it is possible to operate as shown below by connecting the wired-remote control to the CD-ROM with the
interface.
When the test command is used, put in the short socket to MA, SL and GND pins of pin header (CN 75 1) on the rear
panel, and turn the power on. (Refer to Fig . 2)
• Schematic Diagram of the Conversion Jig for Remote Control Operation
~G~ ~10 1S>
Interface
r------------ - -------------,
I
I !Ok
3 2.2k
2
1 3p mi ni jac k 01
I
1PH type
co nn ecto r (4P)
I
I
I
1 QI : DTCI24ES or UN4212 I
L--------------------------J
MOTHER BOARD ASSY
Fig. 1
23

-DR -
UA124X- 2, DR- UA124X- 3
DR - UA124X- 5
24
REJECT•
PAUSE II PLAYll>
= =
<11111 STILL/STEP 1111>
- MUL Tl- SPEED+
.. SCAN """'
= =
CLEAR FUNC
7 8 9
= = =
AUDIO SPEED OPEN
4 5 6
= = =
VIDEO STOP.M START
1 2 3
= = =
DISPLAY STILL
C-MODE
0 SEARCH
=
CR
FRAME TIME CH APTER
= = =
A B c
RU-V101
• Test command
Key operation
[O]+[TIME]
[I]+[TIME]
[2]+[TIME]
[3]+[TIME]
[4]+[TIME]
[S]+[TIME]
[6]+[TIME]
[?]+[TIME]
[8]+[TIME]
[9]+[TIME]
[STILL/STEP» ]
[STILL/STEP« ]
[ * ]+[*]+[ *]+[MULTI-SPEED+]
[ * ]+[ *]+[ *]+[MULTI-SPEED - ]
REJECT : Spindle stop
PAUSE : Pause
PLAY : Play
STILL/STEP
II~
:JTest command
~II
STILL/STEP
MULTI- SPEED+ :JTest command
MULTI-SPEED -
SCAN
SCAN
CLEAR
FRAME
TIME
CHAPTER
SEARCH
!Okey
DISPLAY
STILL
C-MODE
VIDEO
STOP.M
START
AUDIO
SPEED
OPEN
Command
{OTM}
{lTM}
{2TM}
{3TM}
{4TM}
{STM}
{6TM}
{?TM}
{8TM}
{9TM}
{SF}
{SR}
{***MF}
{***MR}
~~ : Scan FWD
~~
: Scan REY
: Clear
: Frame set
: Time set
: Track set
: Search
: Numerical input
(FUNC+I) : No entry
(FUNC+2) : No entry
(FUNC+3) : No entry
(FUNC+4) : No entry
(FUNC+S) : Stop marker
(FUNC+6) : Start
(FUNC+7) : No entry
(FUNC+8) : No entry
(FUNC+9) : Door open
Description
All servo OFF
Laser-diode(LD)ON
Focus ON
Spindle ON
Slider(fracking ON/OFF
Not used
Lens UP/DOWN(Twice)
Spindle UP/DOWN(30 sec.)
Spindle rotation frequency : Normal speed
Spindle rotation frequency : Fourfold sp ee d
1Track jump : FWD
I Track jump : REY
* * * Track jump : FWD
* * * Track jump : REY
c
(
(

..
( .
(
DR- UA124X-2, DR- UA124X-3
DR- UA124X- 5
Fig. 2 Ad justment Locations
1. Focus Offset Verification
•Objective Verify the DC offset for the focus error a mp .
•Symptom when out of The model does no t focus in and the RF signal is dirty.
adjustment
•Measurement instru-
ment connections
[Procedure]
Connect the oscilloscope to
VREF (CHI), FCS . ERR
(CH2). Refer to Fig. 2.
[Se ttin gs ] 1V/division
10 ms /division
DC mode
• Player state Focus
and spindle servos closed
•A dj ustment location
None
•Disc
YEDS -7
I. Perform the a utom atic a dju s tm e nt (offset, balance and gai n) at the player is pl ay backed by pressi ng the PLAY key.
2. Close th e focus servo.
3. Verify th efocus error voltage at c lo sed is the same voltage (A = B) as the VREF vo lta ge.
CH 1 r :1; •• Ii . 1· .. l!iiliM!!l ·. ~ - r· l .Uii§: VREF }
-GND
Note : Ifthe specified values cannot be obtained or no adjustment is possible by performing the verifications
or adjustments described in adjustment items 1 - 3, the pickup block may be defective.
25

..
DR - UA124X- 2, DR- UA124X- 3
DR - UA124X- 5
2. Tracking Error Balance Verification
•Objective To verify that there
is no variation in the sensitivity ofthe tracking photo diode.
•Symptom when out of Play does not start or track search is impossible.
adjustment
•Measurementinstru- Connect the oscilloscope to
ment connections TRK. ERR. (This connection
may be via a low pass filter.)
•Playerstate Test mode, focus and spindle servos
closed and tracking servo open
[Procedure]
[Settings] 50 mV/division
5 ms /division
DC mode
•Adjustment location None
•Disc
YEDS-7
I. Move the pickup to midway across the disc (R=35 mm) with the SCAN FWD[>[> or REV <l<l key.
2. Press the ( l) +(TIME) key, the (2) +(TIME) key, then the (3) +(TIME) key in that order to close the focus servo
then the spindle servo. •
3. Line up the bright line (ground) at the center ofthe oscilloscope screen and put the oscilloscope into DC mode.
4. Supposing that the positive amplitude of the tracking error signal at TRK ERR is (A) and the negative amplitude is
(B), the following expression is satisfied.
TI
A*B
T
A=B
When
A ~ 8,
A-
9
x-1so5
GND 1
c 2 - . c 1 GND
When
A<8,
9
-A x-1 s os
li
1f\
J
~
c 2 - . l
When there is a DC When there is no DC
component component
3. RF Level Adjustment
•Object iv e To optimize
the playback RF signal amplitude
• Symptom when out of
No play or no search
adjustment
•Measurement instru -Connect the oscilloscope
to RF.
• Player state Test
mode , play
ment connections [Settings] 50 mV/division •Adjustment
location
VR20I (Laser Powe r)
10 ms/division
AC mode
•Disc
YEDS -7
[Procedure]
I. Move the pickup to midway across the disc (R=35 mm) with the SCAN FWD[>[> or REV <l<l key, then press the (1)
+ (TIME) key, the (2) +(TIME) key, the (3) +(TI ME) key , then the (4) +(TIME) key in that order to close the
r es pec tiv e se rvos a nd put the player into play mode. -
2. Adjust VR201 (Laser Power) so that the RF signal amplitude is 1.8Vp-p ± O. l V.
26
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(
(
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