Teac VRDS-10 User manual

TEAC,
(ajieler
“w68 es 9298.
SERVICE
MANUAL
VRDS-10
Compact
Disc
Player
COMPACT
glise
DIGITAL AUDIO
Effective
:
October,
1992
5704962700

VRDS-10
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 abel required in this regulation is shown (1).
CAUTION
@ 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 me
Optical pickup: Type : KSS-151A
Manufacturer : SONY Corporation
Laser output : Less than 0.2 mW on the objective lens
For U.S.A. Wavelength : 760 ~ 800 nm
* CAUTION * ACHTUNG * OBSERVERA * ADVARSEL
@M THIS LABEL IS ATTACHED TO THE PLACE AS ILLUSTRATED TO INFORM THAT THE
APPARATUS CONTAINS A LASER COMPONENT. :
CD DIESE AUFKLEBEMARKE IST AN DEM IN DER ABBILDUNG GEZEIGTEN ORT ;
ANGEBRACHT UM DARAUF HINZUWEISEN, DASS IM INNERN DES GERATS
EINE LASER-KOMPONENTE BEFINDET.
oO PASKRIFTEN SITTER PA APPARATEN SOM VISAS SOM UPPMANING OM ATT
APPARATEN OMFATTAR EN INBYGGD LASERKOMPONENT.
‘oO DETTE MAERKAT ER ANBRAGT SOM VIST | ILLUSTRATIONEN FOR AT ADVARE
BRUGEREN OM AT APPARATET INDEHOLDER EN LASERKOMPONENT.
@) DETTE MAERKAT ER SOM VIST PA ILLUSTRATIONEN ANBRAGT PA INDERSIDEN AF
TOPDAEKSLET FOR AT ADVARE BRUGEREN OM AT YDERLIGERE FREMTRA-NGEN
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-
BUNDET MED FARE FOR UDSAETTELSE FOR LASERSTRALING.
VARNIG: APPARATEN INNEHALLER LASER KOMPONENT MED
STRALNING OVERSTIGANDE KLASS 1
“ADVARSEL: USYNLIG LASERSTRALING VED ABNING NAR j
SIKKERHEDSAFBRYDERE ER UDE AF FUNKTION. UNDGA
UDSAETTELSE FOR STRALING”
“VAROITUS! SUOJAKOTELOA El SAA AVATA. LAITE SISALTAA
LASERDIODIN. JOKA LAHETTAA (NAKYMATONTA) SILMILLE
VAARALLISTA LASERSATEILYA’.
CLASS 1 LASER PRODUCT
LUOKAN 1 LASERLAITE
KLASS 1 LASERAPPARAT

VRDS-10
2 SPECIFICATIONS
{t
AUDIO
(A-F
44)
Number
of
Channels
2
A-FAt
AF
vr
VAR
2FeVAay
Frequency
Response
1
—
20,000Hz
+
0.3dB
ARBRE
1~20,000Hz
+
0.3dB
Signal
to
Noise
Ratio
Better
than
110dB
(1kHz)
SN
EE
110dB
LIE
(1kHz)
Dynamic
Range
'
Better
than
Q99dB
(1kHz)
PAF
S9IVYY
99dB
t_F
(
1kHz)
Harmonic
Distortion
0.0013%
(1kHz)
oh
pees
0.0013
%ELF
(1kHz)
Wow
and
Flutter
Unmeasurable
(Quartz
accuracy)
JO
DIBy9I-
AE
PRARMB
LL
OKIE)
Channel
Separation
Better
than
110dB
(1kHz)
FeVRNENL-Yay
110dBUAE(1kHz)
Output
Analog
2.2Vrms
TFOTHA
2.2Vrms
Digital
0.5Vp-p/
75
Q
(Coaxial)
FVINWKHA
0.5Vp-p/75
2
(COAXIAL)
-15dBm
—-21dBm
(Optical)
—
15~-
21dBm
(OPTICAL)
Bitstream Conversion
8-times oversampling 20-bit digital
filter
D/A Converter
Digital Filter
Analog Filter 3rd order Butterworth filter
PICK UP
Type Optical 3-Beam laser pickup
Objective Lens 2-dimensional parallel drive
Laser Type GaAlAs type semiconductor laser
Wave Length 780nm
SIGNAL FORMAT
Sampling Frequency 44.1kHz
Quantization Bit 16-bit linear/ channel
Channel Bit Rate 4.3218Mb/sec
Channel Modulation Code
EFM (Eight to Fourteen Modulation)
CIRC (Cross Interleave Reed
Solomon Code)
Error Correction
GENERAL
Power Requirements 120/230V AC, 50-60Hz
(General Export Model)
120V AC, 6OHz
(U.S.A./Canada Model)
230V AC, 50Hz (Europe Model)
240V AC, 50Hz
(U.K./ Australia Model)
Power Consumption 22 watts
‘Dimensions (W x H x D)
442 x 149 x 331mm
(17-3/8" x 5-7/8" x 13-1/16" )
Weight (net) 10.0kg (22-1/16 Ibs)
Standard Accessories Wireless Remote Control Unit
(RC- 481), RCA pin-plug cord,
Battery (SUM-3, “AA’, ”"R6” type)
x 2, Lock Plate
@improvements
may
result
in
specification
or
feature
changes
without
notice.
D/A DYIN-F— Ey hKARU-L
FVIND 4 NI BSHEA-N-HUYTPUYS
ey kKFYINWI ANI
FHOAI 4 II BRNI-ID-AD 4 II
(Ex IPT)
AH
SLY
ABH
KHARSE-L
WML YARHAN 2 RIFT
UR ate LD ——
BR 780nm
25 94—Vy b)
BAL ARR 44.1kHz
BTiteEy
bk
Ey
h-ULP/F
VAIL
wEL—b 4.3218Mb/ sec
BAX EFM
IS—-TEAX CIRC
(fd)
Big
100V
AC
50-60Hz
BREN 18W
NRE Tie 442 x 149 x 331mm (W xX H x D)
28 10kg
aa
@I{VLAVEIY RC-481
ervaIs7I—-F
@ 8 Bit (#3, SUM-3) x 2
@ RRA
* HRS KOMI, CEOKD PH BETS CEMB”VET ©

VRDS-10
3 CASE AND FRONT PANEL REMOVAL
a Ge OT LA
e in numbe
mbl
BSMICHLT <A
Disasse

VRDS-10
4
ADJUSTMENT
AND
CHECKS
a
ce
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.
Earth ring
(Lead wire)
Pick-up case
Chassis (GNO)
2. Objective
@Laser
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 isopropyl alcohol and wipe
the objective gently. Wipe off and excess fluid with a
dry cleaning tissue.
Earth
Fig. 4-2
1.Ey97 17 ASSY OR
OLY
ITY
TASSY
EATERS,
V-F-
PA
A
FORE
PBB
ILO
TD,
UT
RRS
(Fig.
4-l
HBT
LUT
DOMEELTCR
EW, Eh.
MOU
ZB
SRO
Mth
BicbAT)
y
VEALTCOR
SAU.
MATYU
y
VELEKECAU-F-P
1A
FUBLER
Ao
Oy
ITY
TASSY
EMYRIBS,
WERE
ECHR
F-REMSEHI,
AKT
-
REAR,
BEBE
TOE
LUC
HAW,
(Fig.
4-2)
KLD-P-YHA-K,
BBROMDS
EARS
CEP
LED, EMBL ETOCHIERL TC KR Sb
OMA,
MOAL,
HE
BVO,
Fig.
4-30AME
BR
CHETCHEU,
M7
IF
aL—-9—-,
KRM.
LDF
D—behlt,
FERNY
NLMAKLY
LIVE
KAU
OFS
YLT
HT
WVIO
A
y
FATS
BS
SANIT
OT
4
TEAWS
OI
Sy
ETAT
MENS
UO
CIHERE
LTHERLT
6
PERV
@
HAF
lS30W,
320°CU
FAA
L,
IEP
<
MEL
TK
ES
Wo
OLY
ITY
TASSY
AAKOBES
KUGABRTE
EIE
LEVEE
Sry
OLY IT yT ASSY BF + SBMA TSK HES 0
Ol
KIVGLORET
SM.
Bi
SEOMM
LH
T
KHER
Resistor
IMQ ~ 10M2
LD Plate
Photosensor
Fig. 4-3
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OL —¥-KALAAROKARUARTH. HOKEOR, E
EV Y ADS 20cm WEBEL TK KEL,
@UVVACSFEMNEOE CR SW.
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UTC RS.
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C—WVFIVA—IW (LP.A) HIB UCHR L. BAR OME
SIMPFRE Lo TCHS
:
:
a
;
2

i
VRDS-10
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 Iop value
indicated on the pickup by 10mA. (1=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. b--F44A-—FOURF cv 7
(lop (Intensity Optimum) (BFEE2)
(Py FT y SRR LDSTRITOC &)
DC #2 -F¥—-*#SERVO PCBO R407 OMIT S.
PLAY PORRBELHELL TOBED CBRRBBUKME
(1 =$BE/ 22) KREv APT vy ASKRARETHS lop Bs Y
TOMALLEBMLTORUC ELHBT A, HMOWA, DE
UTS AREER HS
* BPR WURICTOHERT SIL.
OVI yTRAY —ORAA
(Bil)
KSS-151A
11191
646
YUP IVNo.
lop i 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.
Fig. 4-4
4. PAtRPARB Ic DT
AB ILMERORDD DS Ev IT SEFSRO, iki CH
ELCHVET. AREOES HU SBA, HTVRRASR
LTC KRSU.

| VRDS-10
4-1
SERVO
ADJUSTMENT
4-1
+-—hKiGE
TEST
DISC:
YEDS-18
or
MCD-111
(Except
4-1-6
and
FARFIAD:
YEDS-18£€EIZMCD-111
(4-1-668kU
4-1-7)
4-1-7TERS)
at 404 R407
V405 F.GAIN
oa
V401
6
ita
SERVO PCB
Fig. 4-6
VOLTAGE CONVERSION
(For general export models)
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.
—
SCLECTOR
2.
Using
a
flat-bladed
screwdriver,
set
to
the
appropriate
230
V
or
120
V
position
according
to
your
area.
230V
G4
120V

VRDS-10 |
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 (<<or PP )
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.
41-1 E IF vA TOF 2 LFF ty 7
BRONBEy 779 ATIF aL-F-M3IBELFHT 4c.
(Cy AP vy PRBARIBOE SI. RAMI BHR LICE
Biko) FA AT VURBLEW.
41-2 2by KNSY RAE
1. TPADIBEY SE TPAD2BE Y (GND) HOBWMEAOV ic
WAKA V405 (S.BAL) FHT 4.
A1-3ShSyY FYING VRE
1. TPID4BEY (TE) E TPIMDSGBEY (GND) Micra
AI—-TeEREL. SEARCH RY (dd EK LPP) ET,
2 bG yt VILLI -fES ORD OV EBINCHRNS & 5 V401
(T.BAL) & HS 4.
AAA D+ -HANDVARBE
1. TPIOSHYY (RFE TPIODSBEY (GND) ict va |
AI-TSEBRT S.
2. PLAYIRME CA YO AI-TFOREMARAI SEI V402
(F.BAL) +39 4.
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.
Fig. 4-8
41-574 -AAZAICy heER
lL. DHA -HANDY ABBERSTOPIREC LUT TP3OA7¢Yb
BEM SOmMVIAF CHS EL LHRT A,
b LABIA STOMA BE V402 (F.BAL) FBT Se

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
Q
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
Oscilloscope
| VRDS-10
4-1-6 74—-AATA VIB (YEDS- 1818)
1.
ASBOSC
&
Y
100k
Q
OLA
LT
1.16kKHz/3.5Vp-p
©
EEA
TPIOLREY(FEZIADTS.
2.
SUAIRAES
TPIT
©
2B
(FEL)
&EH@BOSC
EC
OHTA
90°
te
ZKID
It
V404
(F.GAIN)
HBTS.
SERVO PCB
1.16kHz/3.5V p-p
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
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
1.70kHz/4V p-p
Oscilloscope
Fig. 4-9
4-1-7 Koy Ft UTT4A VRB (YEDS- 1816)
1. ABBOSC £9 100k Q OHH LT 1.70kHz/4Vp-p Of
BX TPID3SHEY (TEZICANTS.
2.7
UF
IRRES
TP1
©
4B
Y
(TET)
EAB
OSC
&
OHLAOS
90°
izttZk
51
V403
(T.GAIN)
FHT
5.
SERVO PCB
Fig. 4-10

VRDS-10 |
4-2 AUDIO ADJUSTMENT 4-747
. Output level
HALAL
. Channel level
difference
F 4 VRIVDLAIVE
ake
DISC: YEDS-18 (MCD-111)
TRACK No. 577
FREQUENCY 282%
SPECIFICATIONS
me
2.2 + 0.3Vrms
REMARKS
1)
1.0dB or less
— ——_+—_—_
. DC offset
adjustment
DC ADZy bE
Adjust V151(Lch),
V251 (Rch) on AUDIO
PCB so that the offset
voltage becomes OmV.
ADewy bBEMOMVIc
B&D AUDIO PCBO
V151 (Leh), V251
(Reh) HHS So
. Harmonic
distortion
Saas
. Frequency
response
Byeestoacd
. S/N ratio
SANE
20Hz~20kHz
=
0.004 % or less
Within + 1.0dB
100dB or better
A00Hz HPF in
20kHz LPF in
reference level: 1kHz
DIN AUDIO
(Use SHIBASOKU 725
or equivalent)
. Channel
separation
Fv VAIL
GINY-Yayv
95dB .or better
DIN AUDIO
. Emphasis effect
LUI rp yVAMR
AUDIO PCB
~ 9.0 = 1.0dB (YEDS-18)
— 20 + 1.0dB (MCD-111)
reference level: 1kHz
Fig. 4-11