Teac VRDS-20 User manual

TEAC,
SERVICE MANUAL
VRDS-20
Compact Disc Player
COMPACT
DIGNAL AUDIO
Effective : March, 1993 574064200

VRDS-20
1 SAFETY INFORMATION
[ SAFETY INFORMATION
This product has been designed and manufactured according to FDA regulations “title 21, CFR, chapter 1, subchapter J, based on the Radiation
Control
for
Health
and
Safety
Act
of
1968”,
and
is
classified
as
class
1
laser
product.
There
is
not
hazardous
invisible
laser
radiation
during
operation
because invisible laser radiation emitted inside of this product is completely confined in the protective housings.
The label required in this regulation is shown (1).
CAUTION
2
@
If
you
remove
the
above-mentioned
housings
under
the
operating
state
of
the
product,
there
is
a
possibility
of
human
access
to
the
invisible
laser
radiation
emitted
from
the
optical
pickup.
Pay
careful
attention,
not
to
let
the
invisible
laser
beam
enter
into
your
eyes.
@
If
you
find
a troubled
state
of
the
laser
diode,
change
to
the
specified
new
optical
pickup.
@
If
you
find
a troubled
state
of
safety
interlock
parts,
change
to
the
same
type
parts
described
in
parts
list.
® CERTIFICATION
THIS PRODUCT COMPLIES WITH DHHS
RULES 21 CFR SUBCHAPTER J APPLI-
CABLE AT DATE OF MANUFACTURE.
TEAC CORPORATION
3-7-3 NAKA-CHO MUSASHINO-SHI TOKYO, JAPAN
MANUFACTURED uF
Optical pickup: Type : KSS-151A
Manufacturer : SONY Corporation
Laser output : Less than 0.2 mW on the objective lens
Wavelength : 760-800nm
* CAUTION * ACHTUNG * OBSERVERA * ADVARSEL
® THIS LABEL 1S ATTACHED TO THE PLACE AS ILLUSTRATED TO INFORM THAT THE
+
Hawise
LASER
mADAtION
WHEN
OPEN
AND
APPARATUS
CONTAINS
A
LASER
COMPONENT.
INTERLOCKS DEFEATED AVOID EXPOSURE TO BEAM
UNSICHTBARE LASERSTRAMLUNG TOITT AUS,
NN CGF NET UND WEN!
Stone ter SvEWIWE GELUNG. Uae ROALCKT 1st
NICHT DEM STRAHL AUSSCTZEN'
AR
OFPSAD
OLN
SPAR
AR
URROOPAD
(4)
DIESE
AUFKLEBEMARKE
IST
AN
DEM
IN
DER
ABBILDUNG GEZEIGTEN
ORT
STRALEN AR FARLIG
ANGEBRACHT UM DARAUF HINZUWEISEN, DASS IM INNERN DES GERATS
EINE LASER-KOMPONENTE BEFINDET. '
‘o PASKRIFTEN SITTER PA APPARATEN SOM VISAS SOM UPPMANING OM ATT
APPARATEN OMFATTAR EN INBYGGD LASERKOMPONENT.
AQVARSEL,
USYNLIG LASERSTRALING VED ABMING, WA
six TUDE AP FUNK TION
Geuin O0oe FTELSE FON SHAKING
NARDIVIS! -SUOIARDTSEO ASA AUNT LATS BSA
FIIQOIN JOKA LAMETTAA (AK YMATONTA)
SUMALLE VAARALUISTA CASERSATERYA
ADVARSEL USYMLIG LASERBESTRALING NAR DENNE DELEN ER
|SSPERREN ER UTKOBLET
CRMGA UISETTECSE FO STRIALING
‘o DETTE M/ERKAT ER ANBRAGT SOM VIST | ILLUSTRATIONEN FOR AT ADVARE
BRUGEREN OM AT APPARATET INDEHOLDER EN LASERKOMPONENT.
@® 2) DETTE M/ERKAT ER SOM VIST PA ILLUSTRATIONEN ANBRAGT PA INDERSIDEN AF
TOPD/EKSLET FOR AT ADVARE BRUGEREN OM AT YDERLIGERE FREMTRAENGEN
VIL VERE FORBUNDET MED FARE FOR AT UDS/ETTE SIG FOR LASERSTRALING.
ADVARSEL — BETJENING AF ANDRE KONTROLLER OG REGULATORER ELLER
BENYTTELSE AF ANDRE FREMGANGSMADER END BESKREVET HERI ER FOR- id
BUNDET MED FARE FOR UDSAETTELSE FOR LASERSTRALING.
VARNIG: APPARATEN INNEHALLER LASER KOMPONENT MED
STRALNING OVERSTIGANDE KLASS 1
“ADVARSEL: USYNLIG LASERSTRALING VED ABNING NAR
SIKKERHEDSAFBRYDERE ER UDE AF FUNKTION. UNDGA
UDSAETTELSE FOR STRALING”
"VAROITUS! SUQJAKOTELOA EI SAA AVATA. LAITE SISALTAA
LASERDIODIN. JOKA LAHETTAA (NAKYMATONTA) SILMILLE
VAARALLISTA LASERSATEILYA’.
ADVARSEL: USYNLIG LASERBESTRALING NAR DENNE
DELEN ER APEN OG SIKKERHETSSPERREN ER UTKOBLET
UNNGA UTSETTELSE FOR STRALING.
CLASS 1 LASER PRODUCT
LUOKAN 1 LASERLAITE
KLASS 1 LASE?APPARAT

AUDIO
Number of Channels
2 SPECIFICATIONS
ft Ee
2
Frequency Response 1 — 20,000Hz + 0.3dB (RCA)
Signal to Noise Ratio
Dynamic Range
Harmonic Distortion
Wow and Flutter
Channel Separation
Output Analog
Digital
D/A Converter
Digital Filter
Analog Filter
PICK UP
Type
Objective Lens
Laser Type
Wave Length
SIGNAL FORMAT
Sampling Frequency
Quantization Bit
Channel Bit Rate
20 — 20,000Hz + 0.5dB (XLR)
Better than 110dB (1kHz)
Better than 99dB (1kHz)
0.0013 % (1kHz)
Unmeasurable (Quartz accuracy)
Better than 110dB (1kHz)
2.2Vrms (RCA)
2.3Vrms (XLR)
0.5Vp-p/75 Q (Coaxial)
-15dBm —~21dBm (Optical ; TOS)
-12.5dBm —-15dBm (Optical ; ST)
Bitstream Conversion
8-times oversampling 20-bit digital
filter
3rd order Butterworth filter
Optical 3-Beam laser pickup
2-dimensional parallel drive
GaAlAs type semiconductor laser
780nm
44.1 kHz
16-bit linear/ channel
4.3218Mb/sec
Channel Modulation Code
Error Correction
GENERAL
Power Requirements
Power Consumption
EFM (Eight to Fourteen Modulation)
CIRC (Cross Interleave Reed
Solomon Code)
120/230V AC, 50-60Hz (U.S.A./
Canada/ General Export Model)
230V AC, 50Hz (Europe Model!)
240V AC, 50Hz (U.K. Model)
22 watts
Dimensions (W x H x D)
Weight (net)
500 x 146 x 331mm
(19-11/16" x 5-3/4" x 13-1/16" )
13.8kg (30-7/16 Ibs)
Standard Accessories Wireless Remote Control Unit
(RC-481 ; for Gold finish version
/RC-495; for Black finish version),
Battery (SUM-3, “AA”, “R6”" type)
x 2, Lock Plate, Foot Base x 4
@
improvements
may
result
in
specification
or
feature
changes
without
notice.
(A-F 4 7)
A-Frx AF VRE
Bpestoaed
SN EE
FAFRVIVYY
ARES
a i hoe
Fe VRIVEIND-Yay
FFOTHA
FUNDA
DSA DYIN-F-
FUINDANG—
PFFOAI4N9—
(Ex IP uv)
AX
WL VY ARHAX
bint]
RE
25 74—Vvy b)
AER
Btitty hx
ini& LY — b
RRAX
L5—asTIEAHX
(AX)
Ek
BRED
WME TE
28
Raa
VRDS-20
2F ev VAIL
1~20,000Hz + 0.3dB (RCA)
20~20,000Hz + 0.5dB (XLR)
110dB ELE CEIAJ)
Q9dB LIF (EIAJ)
0.0013 %ELF CEIAJ)
AVE RR RB Okan ita)
110dBLiE (EIAJ)
2.2Vrms (RCA)
2.3Vrms (XLR)
0.5Vp-p/75 Q (COAXIAL)
-~ 15~- 21dBm (OPTICAL TOS)
— 12.5~- 15dBm (OPTICAL ST)
Ey bARU-L
BEA-N-TUPUYT
20Ey KF YIN D 4a
SRNI-D-AD4NW9—
HL ASB, HPKBE-L
2 ARTETA
BRL Yt
780nm
44.1kHz
Ey hk UDP/F eR
4.3218Mb/sec
EFM
CIRC
100V AC 50-60Hz
18W
500 x 146 x 331mm (W x Hx D)
13.8kg
@e71VLAVEAY RC-481
@ 8 Bit B3, SUM-3) x2
@nx77L-+t
@7ybkX-A2x4
ORAS
* CBRE KUSH, DESOTO PES BETS CLM) ET.

VRDS-20
3 CASE AND FRONT PANEL REMOVAL
HEB an OLA
number-o emble in
Disass
BSMRCHLT ¢ EA

VRDS-20 _
4 ADJUSTMENT AND CHECKS
aa ae t HERS
1. Replacement of the pickup assembly
@ Before removing the pickup assembly be sure to solder
-bridge where indicated in the inset (Fig. 4-1) to prevent
the laser diode from being electrostatically damaged.
After replacing the pickup assembly, be sure to unsolder
the antistatic bridge. Or else the laser diode.does not
function.
@ Before servicing the pickup assembly be sure to prevent
electrostatic-inducer destruction by grounding not only
test equipment in use but also yourself as shown in
Fig. 4-2,
* Electrostatic charge drastically shortens the operating
life of the laser diode or possibly results in its
destruction.
@During the transportation, mounting and dismounting
of the assembly, support with your fingers at points
A and B as shown in Fig. 4-3. Be particularly careful
not to touch the actuator, photosensor and LD plate
and do not apply force to them.
@Don't touch the plated portion of the flat cable end
directly with fingers.
@Use care not to break the flat cable.
@Soldering must be done quickly at less than 30W, 320°C.
@Don't disassemble the pickup ass’y.
@Don't apply shock to the pickup ass’y.
@Don't place the assembly in a place subject to excessive
dust, heat or moisture.
2. Objective
@lLaser beams are similar to infrared rays. Don’t look at
the beams directly and keep your eyes at least 30cm
away from them.
@Don't touch the objective with fingers.
@If objective becomes dirty, playback will deteriorate.
To clean the objective, moisten a good cleaning tissue,
such as made by KODAK, in isopropy! alcohol and wipe
the objective gently. Wipe off and excess fluid with a
dry cleaning tissue.
Earth ring
(Lead wire)
Pick-up case
Chassis (GND)
Earth
Fig. 4-2
1b y97 17 ASSY OZR
@eyr IT vTSASSY FEAF ERI. VAP AA PORS
DERDIL ORD, BRS (Fig. 4-1) 24M TY y YLT
DOVBELTCR AW. Ek. MOU SBR OM hhh
ICHAT y VEALTCR
MID) y VALHEEE CML AF-S 4a Fide lL EE
Ao
@LYVITITASSY EMYORIBSU. MER CMB
F-AEMAZEHI. MAT -AZEAOW, BBR TOME
LT< HAW, (Fig. 4-2)
KL-F-VAA-— KA, MBAWMDS & HOB AEF
LED, EVIE LET OCLHERBLTC KS.
ORO, ROAL, HEMUORIL, Fig. 4-3SD AME BM
CHATS HEY, B77 Fazt—-F7—-, HREM, LDF
V—bmRid, FRANEOWEMAKY LIEWEC KEW
OVI VhTA-FNVEBO X y HRS} UV EL BEE HART TL US ¢
TEKW
OPT IKTH-TFHNisNET OO CHIERE L THER LTS
TES WG
@ HAF IL380W, 320°CEL FHIBHIL. SIS < MEBL TC KS
Wo
@EYVIT YTASSY AAKORMBS KODE EV LEWECK
Sv,
@EYITYTASSY IBF + HBRUMABEK KAW.
@2ti -KIVREORET Zim, Rik SMO LHY T
CHEWS
Resistor
IMQ~10MQ LO Plate
Photosensor
Fig. 4-3
2. dL vy Z(ICDWT
OL —F-HILLATAROAAHMILRHTT. HORBEOA, A
AVY APS 30cm LEBEL TK KEV,
@VVAIILFEMNEUES CHEW,
@LVVALIENANE ¢ &CHEREFIAVR FL EG OC, ROLZK
fat# UTC TER,
VY AIY-aYVIR—-S— (KODAK HH EY) KL fv o
E-IWPVIA-W (LP.A) BRL CHS LL RAR Ok
DIB RSE ETCH EWS
|

VRDS-20 |
3. Laser diode check
(lop (Intensity Optimum) check)
Connect a DC voltmeter to both ends of R407 on SERVO
PCB. Measure the DC voltage while playing a disc to check
that the measured value does not exceed the lop value
indicated on the pickup by 10mA. (I= measured value/22}
If the measured value is higher than that indicated, the
pickup may be damaged.
* Pay special attention that parts are not damaged by
static electricity.
@How to read numbers on sticker attached to the pickup
(Example)
KSS-151A
11191
646
Serial No.
lop value 64.6mA
DC voltmeter
3. -¥-Y44A-— kK OWBF x 7
(lop (intensity Optimum) (BFE)
(Ey 7 Ty SIAR SP RITO CE)
DC RIVE X-F-XSERVO PCB ® R407 O lyn ic hexe sd 4.
PLAY POMRBL MEL. CORED 6 mR LK
(1 = gu IE / 22) Dey 77 vy SCRRETHS lop fiik 0
TOMALLEMIMNL TORO LC ERMERT 5. MIMNOWAI. WHA
UTS BHEPED 5 Se
xR TERT SIL.
OCs IT vy TRAY -NORAA
(Fil)
KSS-151A
11191
646
YY FILNo.
lop {8 64.6mA
SERVO PCB
4. Anti-shock bracket
To protect the laser pickup mechanism from shocks and
movement during transit, it is secured by a special anti
-shock bracket. Before starting operation, be sure to
release this bracket, which is accessed from the bottom.
4. ARREST
AAEM GORDO S Cy 77 y TERS tev, Be
LTH VET. AMEMIES USES, BRE
LTC HRS
ects
a
y
ag
e
| wien

| VRDS-20 _
4-1 SERVO ADJUSTMENT 4-1 +I
TEST
DISC:
YEDS-18
or
MCD-111
(Except
4-1-6
and
FAKFIAD:
YEDS-18#KILMCD-111
(4-1-6HkO
4-1-7)
4-1-7
€BRS)
V404 R407
V405 | F.GAIN |
v401
aS) 1
TP1 V402
[* |
[6{ GNO |
SERVO PCB
Fig. 4-6
VOLTAGE CONVERSION
Be sure to remove the power cord from the AC outlet
before repositioning the voltage converter switch.
1. Locate the voltage selector on the rear panel.
2. Using a flat-bladed screwdriver, set to the appropriate
230 V or 120 V position according to your area.
VOLTAGE
SELECTOR
230V
(a)
120V

VRDS-20 |
4-1-1 Checking the pickup actuator operation
Before loading the disc, turn the power ON and check
that the pickup actuator moves up and down three times.
(If the pickup is not at inside on the disc, perform the
above operation after moving the pickup to the inside.)
4-1-2 Sled balance adjustment
1. Adjust V405(S.BAL) for OV potential between TP4
pin 1 and TP4 pin 2(GND).
4-1-3 Tracking balance adjustment
1. Connect the oscilloscope between TP1 pin 4(TE1) and
TP1 pin 6(GND), and press the SEARCH (<4orP> )
button.
2. Adjust V401(T.BAL) so that the upper and lower
amplitudes of the tracking error signal waveform
become equal above and below OV.
4-1-4 Focus balance adjustment
1. Connect the oscilloscope between TP1 pin 5(RF) and
TP1 pin 6(GND).
2. In the play mode, and adjust V402(F.BAL) so that
the waveform on the oscilloscope becomes maximum.
00404
WILY)
WR ‘\)
\}
)
MA
\ WN
HN
nit
AWN
AAA
Wy
AX
400006
Ss
41PeE sy IF ye SP OF aAL—9 BEF cD
BRON 77 vy SP 7Fat—-F-M38BEFHTACE,
(Cy 7 Fy TSHBRARMK BOE Sd. RABE Lacey
Ale) FA ATURE LEW S
41-2Aby KFNGV ARB
1. TPADIBEYE TPAD2ZBE Y (GND) MOM EAOV Ic
BK IZ V405(S.BAL) EHMETS.
41-3 b Sy FYING YRBE
1. TPID4HEY(TE1)E TPIMDEGBREY (GND) ica va
RI-DPEGEL. SEARCH DI VV (4d EKIS PH) LH,
2G FVY FLIES OMEMOV EHIMCHRIS & 5 V401
(T.BAL) #3 ¢ 4.
41-474 -AZNDVYARE
1. TPIOSHEY(RF)é TPIODG6BEY (GND) ica va
AIN-TRERT S.
2. PLAYIKKE CA Y AAD —SORMARA ILI S KITV 402
(F.BAL) © iE o 3.
Ny
MY
WN
iM)
ANY)
)
Maximum
M)
Fig. 4-8
4-1-5 Focus offset check
1. After adjusting the focus balance, stop the player. Check
for an offset voltage of 50mV or less at TP3.
If reading values are out of spec, adjust V402 (F.BAL)
again.
4-1-4574 -HAADEy hE
lL. P#-HAND VY ARRMESTOP IRAE LC TP3OA7t yb
HEA 5SOMVALE CHS IL EHTS.
4 LABILA 6 UBS BE V402 (F.BAL) 2H S.

4-1-6 Focus gain adjustment (Use YEDS- 18)
1. Apply 1.16kHz/3.5Vp-p to TP1 pin 1(FE2) from
an external OSC via 100k resistor.
2. Adjust V404(F.GAIN) so that phase at TP1 pin 2
(FE1) is 90° with respect to that of the external OSC
during playback.
Oscillator
1.16KHz/3.5Vp-p
Oscilloscope
| VRDS-20 _
4-1-6 74 —-AATA VIBE (YEDS- 181)
1. ABBOSC & Y 100k Q OF RE LT 1.16kHz/3.5Vp-p®
{224 7P1 O01 BEY (FEQZIZCANTS,.
27 FARK TPL O 2B Y (FEI EAM OSC EMA
90° inte Zk 3 tt V404 (F.GAIN) &3H4 + Z,
SERVO PCB
Fig. 4-9
4-1-7 Tracking gain adjustment (Use YEDS- 18)
1. Apply 1.7kHz/4Vp-p to TP1 pin 3(TE2) from an
external OSC via 100k Q resistor.
2. Adjust V403(T.GAIN) so that phase at TP1 pin 4
(TE1) is 90° with respect to that of the external OSC
during playback.
Oscillator
1,70kH2/4Vp-p
Oscilloscope
4-1-7 KSy FYTT4 VIBE (YEDS- 1816)
1, ABBOSC KY 100k Q OHA LT 1.70kKH2/ 4Vp- p O18
BETPIDZSBEYV (TEI ANTS.
2 TVA TPIO4BE Y (TEL) EWM OSC & OLED
90° Ix H5k5 it V403 (T.GAIN) £39 3.
SERVO PCB
Fig. 4-10

VRDS-20 |
4-2 AUDIO ADJUSTMENT 4-7 470%
. Output level
HALAIL
DISC: YEDS-18 (MCD-111)
TRACK No. } 347
FREQUENCY Bik 2%
SPECIFICATIONS
0.3Vrms (UNBAL)
0.3Vrms (BAL)
REMARKS
i %
load impedance :
BHIVYE-FYA:
50k Q2 (UNBAL)
600 Q (BAL)
. Channel level
difference
Fe VRIVLSIVE
1.0dB or less
. DC offset
adjustment _
DCAD» bE
0 + SmV (UNBAL)
Adjust V151 (bch),
V251 (Rech) on AUDIO
PCB so that the offset
voltage becomes OmV.
AI» bBEAMOMVIC
&HSEKDAUDIO PCB
V151(Leh), V251 (Reh)
ERTS.
. Harmonic
distortion
Bake
. Frequency
response
FEROS TE
. S/N ratio
SAN IE
20Hz~20kHz
0.004 % or less
Within + 1.0dB
100dB or better
AOOHz HPF in
20kHz LPF in
reference level: 1kHz
DIN AUDIO
(Use SHIBASOKU 725
or equivalent)
. Channel
separation
Feely
BNL-Yay
95dB or better
DIN AUDIO
. Emphasis effect
LY 7 YAR
10
AUDIO PCB
— 9.0 = 1.0dB (YEDS-18)
~ 20 + 1.0dB (MCD-111)
reference level: 1kHz
Fig. #-11

VRDS-20
5 IC BLOCK DIAGRAMS
CFOx»7IAVIGA
U121 SM5840AP U151, 251 TDA1547
é a LRCt DIN .
TT Vop VDDD VSSD
FILTER CALCULATION & Vss _ :
ATTENUATION CALCULATING LOGIC Locic INL
TIMING
DRIVERS : DRIVERS
MODE & BCKO
MODE <<
ATTENUATOR i CLKL
INTERFACE
FY
contro
gu
WCKO
CLKR
TT be DOL
EE
DOR
VDDDR
VDDOE
VSSDR VSSDL
SWITCHED i SWITCHED d
VREFR CAPACITOR : CAPACITOR VREFL
NETWORK : NETWORK
AGNDR : AGNDL
—DACR —DACL {
+DACR +DACL
AGNDR AGNDR
NC NC
+OUTR + OUTL
—OUTR — OUTL
RIGHT CHANNEL =} LEFT CHANNEL
VSSA VDDA
U122 SAA7350AGP
ac
“ ou ia core
x
= 5 2 Q «26 oa 44
= le) 2) 7) oa ca aw ‘
x x< x <x a>> > > SS
(14) (15mm) (43 m4) (25N2E) C292) 24)
vss D>+4> aa
Test G))
TEST (40) -
Lele pele yal
tO ae eee | Pp om
0
SHAPER (R) es
+ AEE) Eel 2) FBR
AND OFFSET +5V CT 3) INTR—
SCKI (19) a (8) VSSAT
ws! (3) =>
a a r Ce }--@ ime
mad 5 rr 4 FBL+
spiz (7) tc
= 5 NOISE oe INTL
z SHAPER () breed
IDF1 (5) AND OFFSET oa ——> pat
IDF2 om
IDF3
(3)
Ln
INTL—
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CIDE) C39=G9=C9I-89)
Zz aoa = ee ee pee
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ia) o> Sa >
11

VRDS-20
12
U401 CXA1081S
RFI
PD
PDI
PD2
vc
EO
Et
VR
cc2
U403 CXD2500AQ
XVOD
Q®Q@OOO®
AUTO
ASYMMETRY
AUTO ASYMMETRY = BUFFER
CONTROL AMP
DEFECT
BOTTOM
LD
TRACKING
ERROR AMP
MIRROR HOLD
AM
onan a
MIRROR
—_—_
MIR IRROR
DEFERENTIAL
AMP
32K RAM
+ O
E@2
o
a
ZO
SB8a08
eR ER 2& ZzZ8233
a
a
QOOOQOH
GENERATOR
/
DIGITAL
PLL
\
EFM
REGISTER
VARI
-
PITCH
DEMODULATOR
2
(DOUBLE SPEED /
[> SYNC
PROTECTOR
y
TIMING
GENERATOR 1
ADDRESS PRIORITY
GENERATOR ENCODER
i
ERROR
CORRECTOR
DIA
DATA
PROCESSOR
PEAK P|
DETECTOR =
DIGITAL
mere
CPU
INTERFACE
EFM
ASY
0 GND
cB
cp
MIRR
DEFECT
TE
FE
FE BIAS
VEE
cci
SERIAL/PARALLEL
PROCESSOR @) PLCK
|
|
,
|
:
j
:
|
;

| VRDS-20
U402 CXA1372S
CB
cP
RFI
RFO
INPUT SHIFT REGISTER
DVee
ADDRESS
DECODER
OUTPUT DECODER
TZC
FS1~4 TG1,2 TM1-7 PSi~3
TE
:
Tat
TDFCT */ TMI
ATSC WINDOW
FOCUS
FZC COMPENSATION
FE
FOFCT

VRDS-20
U491 uPD75212ACW
BASIC
INTERVAL
TIMER
T15/S 10
Tt4/S 11
T13/S 12
T12/813
FIP Ti1/S 14
TIMER /EVENT
CONTROLLER
COUNTER
DRIVER T10/S 15
GENERAL
REGISTER
TIMER/PULSE ROM
GENERATOR PROGRAM MEMORY
12160 x8 BITS DECODE
AND DATA MEMORY
CONTROL 512 x4 BITS
SERIAL
INTERFASE
SYSTEM CLOCK
INTERRUPT GENERATOR Srawaey. CPU SLOCK
ce
CONTROL
N
CG) —2O-—G)
U501 uPD7566CS
POO/INTO ()
INTO
CLOCK cP | TIMER/ INT T POt/VrEF
cL
CONTROL
EVENT
COUNTER)
2
ig: PIOCWO (9)
PIV/Ctns (4)
P12/Cin2 (5)
P13/CINa (5)
Pao
PORT 8
LATCH
BUFFER
men
||
Hae
L
PROGRAM
MEMORY
XOX
GENERAL REGISTER
O®
INSTRUCTION
DECODER
PORT 10
LATCH
BUFFER
DATA MEMORY
64x 4 BITS
cli
SYSTEM
@) CLOCK STANDBY
GENERATOR | CONTROL
QOOS—"QDO@®
Voo
(2) ¥ LATCH
@y—Ss
BUFFER
RESET
a3
14

_VRDS-20_
RDS-20 —
PARTS LIST SECTION
NOTES
@ PC boards shown are viewed from parts side.
@ Parts marked with * require longer delivery time.
@ The parts with no reference number or no parts number in the
exploded views are not supplied.
@<As regards the resistors and capacitors, refer to the circuit
diagrams contained in this manual.
@ A Parts marked with this sign are safety critical components.
They must be replaced with identical components - refer to
the appropriate parts list and ensure exact replacement.
@ Parts of [ ] mark can be used only with the version designated.
[J]:JAPAN (ETC]:GENERAL EXPORT, U.S.A. and CANADA
[GE]:GENERAL EXPORT [E]:EUROPE [UK] :U. K.
OTUY ARORA MORSNTTIET.
@ KNOB RILMMOBFODVET. HODCOHCTR KS
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ODBRICHBOG BARU mBOR BRILHRLETA
OREO, IVFVU-SBBLTHVES. BRR: BR
LTC HAV.
@OAMSREBERRCT. SIRT SRLUST 4 7 vy THEO
Ban ZEAL T< KA.
emt
[J]: JAPAN [ETC] :GENERAL EXPORT, U.S.A. and CANADA
(GE]:GENERAL EXPORT [E]: EUROPE [UK] :U. K.

VRDS-20
6 EXPLODED VIEWS AND PARTS LIST
YUA
S TREE t 18 —
EXPLODED VIEW-1
16

EXPLODED VIEW-1
VRDS-20
REF.NO. PARTS NO. DESCRIPTION REMARKS
I- | *5801565400 CAP [J,GE)
*5801574600 CAP (B) [ETC,E,UK]
Il- 2 *5801565300 STAND (J,GE]
*5801574300 STAND (B) [ETC,E,UK]
jI- 3 *5801565500 BOTTOM CAP (J,GE]
*5801574700 BOTTOM CAP (B) [ETC,E, UK]
I- 4 *5801564400 BOLT, HEXAGON SOCKET (L) [J,GE)
*5801574500 BOLT, HEXAGON SOCKET (L) BLK [ETC,E,UK]
l- 5 *5801567000 COLLAR (L) [J,GE]
*5801574200 COLLAR (L) BLK [ETC,E,UK]
I~ 6 *5801565!100 SIDE PANEL (L)
I- 7 *5801565000 TOP PANEL [J,GE)
*5801566500 TOP PANEL (B) [ETC,E, UK]
l= 8 *5801564300 BOLT, HEXAGON SOCKET (S) [J,GEl
*5801574400 BOLT, HEXAGON SOCKET (S) BLK [ETC,E, UK]
I~ 9 *5801565800 COLLAR (S) [J,GE]
*5801574100 COLLAR (S) BLK [ETC,E,UK]
|-10 *5801564500 BONNET (20)
I-11 *5801565200 SIDE PANEL (R)
I-12 *5801564600 TOP WINDOW
I-13 *5801587100 BONNET CUSHION
1={4 *5801096900 RUBBER SHEET
1-15 *5801563900 TOP CHASSIS (CU)
1-16 *5801564000 REAR PANEL (CU) [J,E, UK)
*5801566600 REAR PANEL (CU=EX) [ETC,GE]
1=17 *5200345600 VOLTAGE SELECTOR PCB ASSY [ETC, GE] Refer to pages 24 and 26
I-18 A\ 5320063300 POWER TRANSFORMER
1-19 *5200360400 POWER PCB ASSY [J] Refer to pages 24 and 26
*5200360430 POWER PCB ASSY [ETC,GE] Refer to pages 24 and 26
*5200360440 POWER PCB ASSY [E] Refer to pages 24 and 26
*5200360450 POWER PCB ASSY [UK] Refer to pages 24 and 26
1-20 *5801406000 TRANS BASE
1-21 *5200358600 ST LINK PCB ASSY Refer to pages 24 and 26
1-22 *5801563100 MOUNTING PLATE (ST)
{+23 A 5317003400 BUSHING, 2271 [GE]
A 5317005600 BUSHING, 2272 (J,ETC,E, UK]
1+24 A\ 5350018400 AC CORD CJ]
A 5350010700 AC CORD, SPT-2 [GE]
A, 5350012200 AC CORD, 3P [ETC]
A, 5128089000 AC CORD, CLASS | [E]
A, 5350018700 AC CORD, BS [UK]
1-25 *5200359000 AUDIO PCB ASSY Refer to pages 24 and 25
1-26 *5801563500 PCB ANGLE (CU)
1-27 *5200358500 BALANCED AMP PCB ASSY Refer to pages 24 and 25
1-28 *5801565900 MOUNTING PLATE (XLR)
1-29 *580153280! JO!NT ROD
I=30 *5801563700 CENTER CHASSIS (CU)
1-3 | *5801563600 CHASSIS ANGLE (CU)
I-32 *5200358900 SERVO PCB ASSY Refer to pages 22 and 23
1-33 *5801564100 FRONT PANEL (20) ASSY [J,GE]
*5801566300 FRONT PANEL (20-B) ASSY [ETC,E, UK]
1-34 *5801532500 BOLT, HEXAGON SOCKET B (J,GE]
*5801539500 BOLT, HEXAGON SOCKET B (BLK) [ETC,E, UK]
1-35 *5801531000 BUTTON CAP (P) ASSY (J, GE]
*5801539600 BUTTON CAP (P) BLK ASSY [ETC,E, UK]
1-36 *5801070200 POWER SPRING
1-37 *5801532700 FL COVER
1-38 *5801531100 BUTTON CAP (0/C) ASSY {J,GE]
*5801539700 BUTTON CAP (0/C) BLK ASSY [ETC,E, UK]
1=39 *5801563800 FRONT CHASSIS (CU)
1-40 *5200345400 KEY PCB ASSY Refer to pages 22 and 23
I-41 eee men enn MAIN CHASSIS (CU)
1-42 *5200364300 MUTE PCB ASSY Refer to pages 24 and 26
(Continued on page 26)
17

VRDS-20
EXPLODED VIEW-2
ae.
“e\
\
i
ek

VRDS-20
EXPLODED VIEW-2
REF.NO.
PARTS
NO.
DESCRIPTION
REMARKS
2-
|
*5801532300
TRAY
PANEL
2~- 2 *5801512600 TRAY (C)
2- 3 *5801564700 TOP ANGLE (CU)
2- 4 *5801132601 CUSHION
2-5 *5801203100 GUIDE (L)
2- 6 *5801203001 GUIDE (R)
2-7 5301754000 SW, LEAF LSC=!220=!AU
2- 8 5800979500 LOADING BELT
2- 9 5800979400 GEAR (B)
2-10 5800979300 GEAR (A)
2-11 *5801497100 CUSHION
2-12 *5801497000 STOPPER
2-13 *5801564800 MECH BASE CHASSIS (CU) ASSY
2-14 *5801535300 SPINDLE SUPPORT (G)
2-15 *5801506800 HOUSING ASSY
2-16 *5801096900 RUBBER SHEET
2-17 *5801513200 ROTOR STOPPER
2-18 *5801057510 COIL SUPPORT ASSY
2-19 *5801117100 ROTOR MAGNET ASSY
2-20 *5801507100 TURN TABLE ASSY
2-21 *5801057000 CLAMPER YOKE
2-22 *5801493500 MAGNET
2-23 *5801096300 PRESSURE SPRING (C)
2-24 *5801167701 CENTER CAP
2-25 *5801056900 CENTER RING
2-26 *5801057200 MAGNET HOLDER
2-27 5800979200 MOTOR PULLEY
2-28 5370009200 DC MOTOR, RF-500TB
2-29 *5200344900 T=-MOTOR PCB ASSY Refer to pages 22 and 25
2-30 *5800846500 RUBBER BUSH
2-31 *5800875001 FROATING SPRING C
2-32 *5800846700 SPRING SUPPORT
2-33 *5801086601 FLOATING SPRING A
2-41 5783543008 SCREW, BIND P=TITE M35X8 (NI BLK)
2-42 5783783006 SCREW, BIND B-TITE M5X6 (CU)
2-43 5783693008 SCREW, BIND S=TITE M3X8 (NI BLK)
2-44 *5786772000 CABLE CLAMP, WS-IN
2-45 5786003000 ExRING, E=3 (JIS)
2-46 5783693006 SCREW, BIND S-TITE M3X6 (NI BLK)
2-47 5780002603 SCREW, BIND M2.6X3
2-48 5780023006 SCREW, BIND M3X6 (NI BLK)
2-49 5783663010 SCREW, FLAT B-TITE M3X10 (NI BLK)
2-50 5780023008 SCREW, BIND M3X8 (NI BLK)
2-51 5783533008 SCREW, BIND B-TITE M3X8 (NI BLK)
2-52 5780022004 SCREW, BIND M2X4 (NI BLK)
2-53 5785342200 WASHER, POLY 2.6X5X0.25T
2-54 5780212004 SCREW, FLAT M2X4 (NI)
2-55 5780023010 SCREW, BIND M3XI0 (NI BLK)

VRDS-20
EXPLODED VIEW-3
20