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25

Be sure to take static electricity countermeasures before adjusting the optical system.  Adjust the optical systems according to
the prescribed procedure.

• Optical pickup tilt adjustment is needed after replacement of the following components.

1. Optical pickup unit
2. Disc motor
3. Traverse motor
4. Optical pickup peripheral parts (such as rail)

Adjustment is generally unnecessary after replacing other parts of the traverse unit.  However, make adjustment if there is
a noticeable degradation in picture quality.
Optical adjustments cannot be made inside the optical pickup.

• Follow the adjustment procedures described in this Manual.

Application

Name

Number

Tilt adjustment

DVD test disc

DVDT-S15AS or DVDT-S01

Inspection

Extension cable + PCB
(Traverse ass’y to main P.C.B.)

RFKZ0470 (26Pin) + RFKZ0468(PCB)

Extension cable + PCB
(Traverse ass’y to main P.C.B.)

RFKZ0471 (7Pin) + RFKZ0469(PCB)

Tilt adj. jig

RFKZ0118

Others

Screw lock

RZZ0L01

Grease

JGS0101

Lubricating oil

RFKXGUD24

Confirmation

CD test disc

PVCD-K06
or any other commercially available disc

VCD test disc

PVCD-K06
or any other commercially available disc

• Surface precision is vital for DVD test discs.  Be sure to store and handle them carefully.

1. Do not place discs directly onto the workbench, etc., after use.
2. Handle discs carefully in order to maintain their flatness.  Place them into their case after use and store them vertically.  Store

discs in a cool place where they are not exposed to direct sunlight or air from air conditioners.

3. Accurate adjustment will not be possible if the disc is warped when placed on a surface made of glass, etc.  If this happens, use a

new test disc to make optical adjustments.

4. If adjustment is done using a warped disc, the adjustment will be incorrect and some discs will not be playable.

Measurement point

Adjustment point

Mode

Disc

-----

Tangential adjustment screw
 
(Adjustment screw A)
 
Radial tilt adjustment screw 
 
(Adjustment screw B)

Tracking servo "ON"
 

 
Tracking servo "ON"

DVDT-S01/S15AS

Measuring apparatus

Adjustment value

None (Use the service indication on the main unit)

Adjust the jitter value to the minimum level.

26

Remove the solder shorts before trying to make the adjustment.

1. Connect the main P.C.B. to the traverse ass’y with the extension cable.
2. Install the traverse ass’y to the tilt adjustment jig with three screws and three washers.

Remove the rubber cushion of the traverse ass’y.

3. Install the traverse ass’y to the disc.

Make sure the disc is installed on the disc motor securely.

4. Disassemble the Main P.C.B., Operation P.C.B., Inverter P.C.B. and LCD panel as shown in figure below.
5. The disc cannot be played back with the disc cover removed. Press and hold down the S5201 (Secure with cellulose tape).

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1. Play back the disc (DVDT-S01/S15AS) and make sure the RF signal is outputted.
2. Play back the areas within a radius of 40 ± 1 mm of the disc (middle circumference).
3. Turn the adjustment screw A to minimize the jitter value in the tangential direction.

(*Once turn the screw to the full position and then back off. You should finish tightening in the tightening direction.)

4. Turn the adjustment screw C to minimize the jitter value in the radial direction.

(*Once turn the screw to the full position and then back off. You should finish tightening in the tightening direction.)

5. DISC height measurement (Measure the middle of the deflection of the disc and motor surface.)

*If the measured height is out of range, adjust to the specified value using the adjustment screws A, B, and C (by the same
angle).

Play back the test disc and ordinary discs to make sure that there is not any  deterioration of image quality or missing of sound at

the inner, middle, and outer circumferences.

28

INITIAL/LOGO

ABBREVIATIONS

A

A0~UP
ACLK
AD0~UP
ADATA
ALE
AMUTE
AREQ
ARF
ASI
ASO
ASYNC

ADDRESS
AUDIO CLOCK
ADDRESS BUS
AUDIO PES PACKET DATA
ADDRESS LATCH ENABLE
AUDIO MUTE
AUDIO PES PACKET REQUEST
AUDIO RF
SERVO AMP INVERTED INPUT
SERVO AMP OUTPUT
AUDIO WORD DISTINCTION SYNC

B

BCK
BCKIN
BDO
BLKCK
BOTTOM
BYP
BYTCK

BIT CLOCK (PCM)
BIT CLOCK INPUT
BLACK DROP OUT
SUB CODE BLOCK CLOCK
CAP. FOR BOTTOM HOLD
BYPATH
BYTE CLOCK

C

CAV
CBDO
CD
CDSCK
CDSRDATA
CDRF
CDV
CHNDATA
CKSL
CLV
COFTR
CPA
CPCS
CPDT
CPH1~3
CPUADR
CPUADT
CPUIRQ
CPRD
CPV
CPWR
CS
CSYNCIN
CSYNCOUT

CONSTANT ANGULAR VELOCITY
CAP. BLACK DROP OUT
COMPACT DISC
CD SERIAL DATA CLOCK
CD SERIAL DATA
CD RF (EFM) SIGNAL
COMPACT DISC-VIDEO
CHANNEL DATA
SYSTEM CLOCK SELECT
CONSTANT LINEAR VELOCITY
CAP. OFF TRACK
CPU ADDRESS
CPU CHIP SELECT
CPU DATA
CLOCK PULSE SOURCE DRIVE
CPU ADDRESS LATCH
CPU ADDRESS DATA BUS
CPU INTERRUPT REQUEST
CPU READ ENABLE
GATE DRIVER CLOCK PULSE
CPU WRITE ENABLE
CHIP SELECT
COMPOSITE SYNC IN
COMPOSITE SYNC OUT

D

DACCK
DEEMP
DEMPH
DIG0~UP
DIN
DMSRCK
DMUTE
DO
DOUT0~UP
DRF
DRPOUT
DREQ
DRESP
DSC
DSLF
DVD

D/A CONVERTER CLOCK
DEEMPHASIS BIT ON/OFF
DEEMPHASIS SWITCHING
FL DIGIT OUTPUT
DATA INPUT
DM SERIAL DATA READ CLOCK
DIGITAL MUTE CONTROL
DROP OUT
DATA OUTPUT
DATA SLICE RF (BIAS)
DROP OUT SIGNAL
DATA REQUEST
DATA RESPONSE
DIGITAL SERVO CONTROLLER
DATA SLICE LOOP FILTER
DIGITAL VIDEO DISC

INITIAL/LOGO

ABBREVIATIONS

E

EC
ECR

ENCSEL
ETMCLK
ETSCLK

ERROR TORQUE CONTROL
ERROR TORQUE CONTROL REFER-
ENCE
ENCODER SELECT
EXTERNAL M CLOCK (81MHz/40.5MHz)
EXTERNAL S CLOCK (54MHz)

F

FBAL
FCLK
FE
FFI
FEO
FG
FSC
FSCK

FOCUS BALANCE
FRAME CLOCK
FOCUS ERROR
FOCUS ERROR AMP INVERTED INPUT
FOCUS ERROR AMP OUTPUT
FREQUENCY GENERATOR
FREQUENCY SUB CARRIER
FS (384 OVER SAMPLING) CLOCK

G

GND

COMMON GROUNDING (EARTH)

H

HA0~UP
HD0~UP
HINT
HRXW

HOST ADDRESS
HOST DATA
HOST INTERRUPT
HOST READ/WRITE

I

IECOUT
IPFRAG
IREF
ISEL

IEC958 FORMAT DATA OUTPUT
INTERPOLATION FLAG
I (CURRENT) REFERENCE
INTERFACE MODE SELECT

L

LDON
LPC
LRCK

LASER DIODE CONTROL
LASER POWER CONTROL
L CH/R CH DISTINCTION CLOCK

M

MA0~UP
MCK
MCKI
MCLK
MDATA
MDQ0~UP
MDQM
MLD
MPEG

MEMORY ADDRESS
MEMORY CLOCK
MEMORY CLOCK INPUT
MEMORY SERIAL COMMAND CLOCK
MEMORY SERIAL COMMAND DATA
MEMORY DATA INPUT/OUTPUT
MEMORY DATA I/O MASK
MEMORY SERIAL COMMAND LOAD
MOVING PICTURE EXPERTS GROUP

O

ODC
OEH
OEV 1, 2
OFTR
OSCI
OSCO
OSD

OPTICAL DISC CONTROLLER
SOURCE DRIVER OUTPUT ENABLE
GATE DRIVER OUTPUT ENABLE
OFF TRACKING
OSCILLATOR INPUT
OSCILLATOR OUTPUT
ON SCREEN DISPLAY

P

P1~UP
PCD
PCK
PDVD
PEAK
PLLCLK
PLLOK
PWMCTL
PWMDA
PWMOA, B

PORT
CD TRACKING PHASE DIFFERENCE
PLL CLOCK
DVD TRACKING PHASE DIFFERENCE
CAP. FOR PEAK HOLD
CHANNEL PLL CLOCK
PLL LOCK
PWM OUTPUT CONTROL
PULSE WAVE MOTOR DRIVE A
PULSE WAVE MOTOR OUT A, B