Teac PD-135 User manual

TEAC.
SERVICE MANUAL
Compact Disc Player
COMPACT
olise
DIGITAL AUDIO
Effective;
Octover
1987
5704037300

SPECIFICATIONS
System
Compact
disc
digital
audio
system
AUDIO CHARACTERISTICS
Frequency
Response
5H2-20kHz,
+
1dB
Harmonic
Distortion
Less
than
0.007%
(1kHz)
S/W Ratio
More than 90dB
Wow
and
Flutter
Quartz
precision
Channel
Separation
More
than
80:B
(1kHz)
Output
Voltage
max.
2Vrms
FUNCTIONS
Instant Program Selection
Sequential, with MUSIC SKIP
p> pei andid< buttons
Index Sequential, with SEARCH/INDEX » Pb and
SEARCH/INDEX << buttons (Stop mode only)
Forward/back Forward/back with sound
Program Functions 16 selections
Repeat All selections all programmed selections
Reset Press STOP button
Pause Each selection
Disc Loading Motor driven horizontal loading
DIGITAL SIGNAL PROCESSING
Optical Pickup 3-beam laser
Error Correction CIRC
Sampling Frequency 44.1kHz
D/A Conversion 16-bit linear
Filter Digital filter + (4-pole LC filter)
GENERAL
Power Source 120V, BOHz (U.S.A/CANADA)
220V, 50Hz (EUROPE)
240V, 50Hz (AUSTRALIA)
110/220V, 50/60Hz (GENERAL EXPORT)
9 Watts
Power Consumption
Dimensions (W x H xD) 435 85.5 x 290mm
Weight
3.5kg

FUNCTIONAL BLOCK DIAGRAM
wor
¥SN3IdNOD
3SVHd
AS~
(WN)
¥OLOW
370NIaS
=
IANO OD ONINDVEL
rl
PETEeL, [ese]
OUD
YORLNOD
NNBLSAS
HOLYSN3dNOD 3SVHd
wOIvYaNa9
HQUIMS,
TNS
TEA
D04
JOVILN
43L0dNOD
Cuow
2ONV Ive
snoos
waNaHD
JOULNOD
OD
SIS
VHANIIG
BOL
VEvdsS:
3002-8NS
HOLIMS:
7OuLNOD
ONO VEL
0193130 SSOWD OUIZ
snoos
NOUDIOD
@NOLIILI0
2200
w4LH3ANOD vO ;
Soto
~
WISABD
ed~10 Wes ah
9019 0
woo
SNI04
WOD
ONIN
WHL
521 gl
1@
a
HOLYSN34NOD
'
to
3SVH
dv
43Sv7
cane)

SAFETY CERTIFICATION
This Compact Disc Player is made and tested to meet exacting safety standards.
Laser Diode Properties
Material; Ga-Al-As
Wavelength: 755-815nm (25°C)
Laser Output: Continuous Wave max. 0.7mW
CAUTION - INVISIBLE LASER RADIATION WHEN OPEN AND
INTERLOCKS DEFEATED. AVOID EXPOSURE TO BEAM.
VORSICHT! UNSICHTBARE LASERSTRAHLUNG TRITT AUS
WENN DECKEL GEOFFNET UND WENN
SICHERHEITSVERRIEGELUNG UBERBRUCKT IST.
NICHT DEM STRAHL AUSSETZEN!
\ARNING- QSYNLIG LASERSTRALNING NAR DENNA DEL
AR OPPNAD OCH SPARR AR URKOPPLAD.
STRALEN AR FARLKG.
ADVARSEL- USYNLIG LASERSTRALING VED ABNING. NAR
SIKKERHEOSAFBRYDERE ER UDE AF FUNKTION.
UNDGA UODSAETTELSE FOR STRALING.
CLASS 1 LASER PRODUCT
CAUTION
—
USE
OF
CONTROLS
OR
ADJUSTMENTS
OR
PERFORMANCE
OF
PROCEDURES
OTHER
THAN
THOSE
SPECIFIED
HEREIN
MAY
RESULT
IN
HAZARDOUS
RADIATION EXPOSURE.
THE COMPACT DISC PLAYER SHOULD NOT BE ADJUSTED OR REPAIRED BY ANYONE EXCEPT QUALIFIED
SERVICE PERSONNEL.
LASER BEAM RADIATION SPOT
Optical Pickup Properties
Material: Ga-Al-As
Wavelength: 790“um
Output Power: Max. 1.8mW
Radiant Power: Max. 8uW(Class_ I)
Laser Beam Radiation

CABINET & CHASSIS EXPLODED VIEW

EXPLODED VIEW -l
REF .NO. PARTS NO.
CA *9A00 765600
*9A0082 2300
CA *9A00 766300
*9A0082 2900
CA 9A00 765800
9A0082 2500
CA 9A00 765900
9A0082 2600
CA 9A00 766000
9A0082 2700
CA 9A00 765700
9A00822400
CA 9A00 766100
9A0082 2800
CA *9A00181500
9A00181700
*9A00179200
*9A00179800
*9A00169900
*9A001 70100
*9A00170200
*9A004 16400
*9A0 0442300
*9A00! 70500
*9A00 170600
*57605 18700
AN *9A001 49600
A *9A001 82200
*9A00 769700
*9A00182500
*9A00 182600
A *576 1246800
A *9A0 04 43300
A *9A00767400
A *9A00770100
9A00767500
9A00 769300
9A00769600
9A00770200
9A00769800
*9A00768500
*9A007685 10
*9A00 768700
*9A00768600
*9A00 767100
*9A00766700
*9A00 767000
*9A00171700
*9A00767200
*9A00181 400
*9A00 767300
(US]:U.S.A.
[A}]:AUSTRALIA
[C1:CANADA
DESCRIPTION REMARKS
ESCUTCHEON DIAL
ESCUTCHEON DIAL [SILVER]
DECORATE PLATE DIAL
DECORATE PLATE DIAL [SILVER]
KNOB EJECT
KNOB EJECT [SILVER]
KNOB A
KNOB A [SILVER]
KNOB B
KNOB B [SILVER]
KNOB C
KNOB C [SILVER]
KNOB POWER
KNOB POWER [SILVER]
PLATE PAD SWITCH [GE]
SLIDE SWITCH 3P [GE]
COVER
SCREW PAN HD.TPG-B M3X8
PLATE BOTTOM
LEG
METAL MOUNT COVER
CHASSIS MAIN [US,C,E,A]
CHASSIS MAIN [GE]
SHAFT
CUSHION RUBBER
SHAFT
BUSHING [US,C,GE)
BUSHING [E,A]
LUG GROUND [US,E]
MOUNT PCB [A]
SHEET [A]
POWER
POWER
POWER
POWER
CORD [GE]
CORD [E]
CORD [US,C}
CORD [A]
POWER
POWER
POWER
POWER
TRANS [US,C]
TRANS [GE]
TRANS [€]
TRANS [AJ
C. CERAMIC 0.022/50V [US,E]}
MAIN PCB ASSY [US,C]
MAIN PCB ASSY [GE,E,A]
POWER SWITCH PCB ASSY
CONTROL PCB ASSY
SCREW
SCREW
SCREW
SCREW
SCREW
S-TPG BRZ M3X8
S-TPG BRZ M3X8
S-TPG BIN M4xX10
TRANSIT
S-TPG BRZ M3X10
SCREW
SCREW
PAN M3x8 [GE]
S-TPG BRZ M3X14
{GE]:GENERAL EXPORT [&]:EUROPE
Parts marked with *require fonger delivery time.

MECHANISM EXPLODED VIEW

EXPLODED VIEW -2
REF NO. PARTS NO.
9A00567000
9A00171900
9A00172000
9A00172100
*9A001 72200
Ul WN —
*5 760707700
*9A00172300
9A00172600
*9A00172800
*9A001 73000
COON D
VW *9A00 767800
*9A00823 300
13 *9A00 173500
15 *9A00173700
16 *9A00 173800
*9A001 73900
9A00 174000
9A001 74100
9A00174200
9A00174300
9A00174 400
*9A00174500
*9A00 174600
*9A001 74700
*9A00 175300
*9A001 75400
*9A001 75500
*9A001 75600
9A00175700
*9A00175800
*9A00 175900
*9A001 76000
*9A001 76100
*9A001 76200
*9A00 1 76300
9A00823 100
*9A00767900
*9A00768000
*9A00 768 100
*9A00768200
*9A00768300
DESCRIPTION
PICK-UP ASSY
LEAF SWITCH
LEAF SWITCH
MOTOR
CHASSIS ASSY
GEAR MOTOR ASSY
SLIDE BASE PICK-UP ASSY T
LEVER LOCK ASSY
TABLE LOAD
TABLE LOAD [SILVER]
HOLDER DISK
SET SCREW V-CONE 2X4
SCREW WASHER
PAD DISK
TURNTABLE
GEAR PINION
GEAR PICK-UP
GEAR LOAD
GEAR CAM
SCREW (B TITE SEMS)
SCREW (B TITE SEMS) Z
FLAP DISK CRAMP
SLIDE EJECT
LEVER STOP
LEVER HOLD DISK RIGHT
LEVER HOLD DISK LEFT
SHAFT PICK-UP
BALL
ROLLER TABLE
SPRING LEVER
SPRING LEVER
SPRING LEVER
SPRING PLATE
SPRING SLIDE
SPRING LEVER
LOAD
RIGHT
LEFT
STOP
EJECT
LOCK
CD MECHA ASSY 86
SCREW S-TPG BIN M2X6
SCREW BIN M2.
6X4
SCREW S-TPG BRZ M3X6
SCREW PAN PCS M1.7X2.5
SCREW PAN PCS MI.7X2
REMARKS
Z
INCLUDED ACCESORIES
REF .NO. PARTS NO.
*9A00768800
*9A0078 | 000
*9A00 768900
DESCRIPTION
REMARKS
OWNERS MANUAL [C,GE,E,A]
OWNERS MANUAL [US]
PLUG CORD
{US1:U.S.A. [C]:CANADA
[A]:AUSTRALIA
{GE]:GENERAL EXPORT [€]:EUROPE
Parts marked with *require longer delivery time.

ADJUSTMENT PROCEDURES
CAUTION:
Avoid eye exposure to invisible laser beam which is emitted from
laser pickup.
PRECAUTIONS REGARDING ADJUSTMENT
e
Adjustment is performed in the indicated order.
e@ When adjustment is made for one item, check the other items
which follow.
@ The laser pick-up has already been precisely adjusted. Do not
touch its mounting screws or controls.
Laser power control knob
— Do not adjust.
@ When the diffraction grid is adjusted, remove the mechanism.
It is convenient to place an insulating panel on top of the chassis
and then to place the mechanism on top of this. (The wires are
connected.)
Insulator Board
(wood, plastic etc.)
® Refer to the adjustment diagram for the test points and adjust-
ment controls.
The ground point for the measurement equipment is the test
point indicated as GND.
REQUIRED EQUIPMENTS
DC Voltmeter
Dualtrace Oscilloscope
Frequency Counter
Signal Generator
Plastic Screwdriver
Diffraction Grating Adjustment Jig
Test Disc (SONY:YEDS4)
CHECKING FOCUS ERROR SIGNAL
Checking the focus error signal of the pick-up allows for an evalu-
ation of the pick-up. Be sure this is carried out before repair.
1.
2.
Turn on the power and set the unit to the STOP mode.
Connect an oscilloscope between test pin FE of connector
CN7 and test pin GND (Set the time axis to 0.5 seconds/
division.)
. Connect test pin GND to the collector of Q125.
4. Press the OPEN/CLOSE button and place the test disk YEDS4
on the table load. Press the OPEN/CLOSE button again.
The waveform shown below is displayed six times on the
oscilloscope when the table load closes. Check that the p-p
voltage is about 2.5V and that the top and bottom of the
waveform are symmetrical.
Repeated six times
Hee c@en es
i 1
' ' ' ' 4
1
1
1
1 1 1
1 1
i 1 4 ‘ 1 '
i 1
'
‘ t
' ‘
(When recorded on a memory scope)
l
'
4
1
|
*p-p voltage of 2.5V
*+ and — voltage roughly same

ADJUSTMENT PROCEDURES (continuea)
6. The waveform appears again if the OPEN/CLOSE button is
pressed again. This allows for confirmation to be made. The
pick-up is faulty if confirmation cannot be made.
SETTING OF INITIAL POSITION OF VOLUME
The variable resistors are set to the following initial positions.
P102 (FOCUS OFFSET) ......... Mechanica! center
P103 (FOCUS GAIN) ............. Mechanical center
P104 (TRACKING GAIN) ......... Mechanical center
P105 (TRACKING OFFSET) ...Mechanical center
P106 (E/F BALANCE) .............. Mechanical center
FREE RUN FREQUENCY ADJUSTMENT
1. Turn on the power and set the unit to the STOP mode.
2. Connect the frequency counter between test pins VCO and
GND (use probes).
3. Short test pins EFM and GND.
4. Rotate the core of the PLL coil (T101) with a plastic screw-
driver so that the frequency counter indicates 4.3218+ 10KHz.
FOCUS OFFSET ADJUSTMENT
1. Turn on the power and set the unit to the STOP mode.
2. Short test pins FON and GND, and connect a DC voltmeter
between test pins FC and GND.
3. Unload the test disc and adjust P102 so that indication of the
DC voltmeter is OV+50mV.
NOTE:
This adjustment should be made again after the adjustment
of Tracking Gain.
TRACKING OFFSET ADJUSTMENT
1.. Turn on the power and set the unit to the STOP mode.
2. Short test pins TON and GND and connect the DC voltmeter
between test pins TC and GND. ;
3. Unload the test disc and adjust P105 so that indication of the
DC voltmeter is OV+50mV.
NOTE:
This adjustment should be made again after the adjustment
of Tracking Gain.
ADJUSTMENT OF DIFFRACTION GRID
The adjustment cannot be made with this unit. When the adjust-
ment is necessary, replace the mechanism including laser pick-up
with a new one, or replace the pick-up with an already adjusted
one (forwarded by us).
| NOTE:
When the pick-up is replaced, it must be replaced as a unit.
Never replace only laser didde.
ADJUSTMENT OF PICK-UP ANGLE
1. Remove the table load.
2. Directly mount test disc YEDS4 on the turntable.
3. Turn on the power and play back the fourth selection.
4. Connect the oscilloscope between test pin HF and test pin
GND. Monitor the waveform of HF and rotate the angle
adjustment screw so that the waveform is at its maximum.
Angle
Adjustment Screw
E-F BALANCE ADJUSTMENT
1. Short test pins DO and E3, and connect an oscilloscope and a
DC voltmeter to test pins TE and GND through the low-pass
filter.
2. Mount test disc YEDS4 and set the player to the playback
mode. Load +5V to test pin TON and turn off the tracking
servo.
3. Adjust P106 so that indication of the DC voltmeter is within
+5mvV.