DANGER - LASER RADIATION WHEN OPEN.
AVOID DIRECT EXPOSURE TO BEAM.
Page 2
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
CAUTION:
TO PREVENT ELECTRIC SHOCK, MATCH
WIDE BLADE OF PLUG TO WIDE SLOT,
FULLY INSERT.
CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK,
DO NOT REMOVE COVER (OR BACK).
NO USER-SERVICEABLE PARTS INSIDE.
REFER SERVICING TO QUALIFIED SERVICE PERSONNEL.
The lightening flash with arrowhead symbol,
within an equilateral triangle, is intended to
alert the user to the presence of uninsulated
“dangerous voltage” within the product's enclosure that may be of sufficient magnitude to
constitute a risk of electric shock to persons.
“WARNING”
“TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK,
DO NOT EXPOSE THIS APPLIANCE TO RAIN OR MOISTURE.”
SAFETY INSTRUCTIONS
Read instructions - All the safety and operating instruc-
1.
tions should be read before the appliance is operated.
Retain instructions - The safety and operating instructions
2.
should be retained for future reference.
Heed warnings - All warnings on the appliance and in the
3.
operating instructions should be adhered to.
Follow instructions - All operating and use instructions
4.
should be followed.
Water and Moisture - The appliance should not be used
5.
near water - for example, near a bathtub, washbowl,
kitchen sink, laundry tub, in a wet basement, or near a
swimming pool, and the like.
Carts and Stands - The appliance should be used only
6.
with a cart or stand that is recommended by the manufacturer.
An appliance and cart combination should be moved with
care. Quick stops, excessive force, and uneven surfaces
may cause the appliance and cart combination to overturn.
Wall or Ceiling Mounting - The appliance should be
7.
mounted to a wall or ceiling only as recommended by the
manufacturer.
Ventilation - The appliance should be situated so that its
8.
location or position does not interfere with its proper ventilation. For example, the appliance should not be situated on a bed, sofa, rug, or similar surface that may block
the ventilation openings; or, placed in a built-in installation, such as a bookcase or cabinet that may impede the
flow of air through the ventilation openings.
ATTENTION:
POUR ÉVITER LES CHOCS ÉLECTRIQUES,
INTRODUIRE LA LAME LA PLUS LARGE DE
LA FICHE DANS LA BORNE CORRESPONDANTE DE LA PRISE ET POUSSER
JUSQU' AU FOND.
The exclamation point within an equilateral
triangle is intended to alert the user to the
presence of important operating and maintenance (servicing) instructions in the literature
accompanying the appliance.
Heat - The appliance should be situated away from heat
9.
sources such as radiators, heat registers, stoves, or other
appliances (including amplifiers) that produce heat.
Power Sources - The appliance should be connected to a
10.
power supply only of the type described in the operating
instructions or as marked on the appliance.
Grounding or Polarization - The precautions that should
11.
be taken so that the grounding or polarization means of
an appliance is not defeated.
Power Cord Protection - Power supply cords should be
12.
routed so that they are not likely to be walked on or
pinched by items placed upon or against them, paying
particular attention to cords at plugs, convenience receptacles, and the point where they exit from the appliance.
Cleaning - The appliance should be cleaned only as rec-
13.
ommended by the manufacturer.
Nonuse Periods - The power cord of the appliance should
14.
be unplugged from the outlet when left unused for a long
period of time.
Object and Liquid Entry - Care should be taken so that
15.
objects do not fall and liquids are not spilled into the enclosure through openings.
Damage requiring Service - The appliance should be ser-
16.
viced by qualified service personnel when:
The power supply cord or the plug has been damaged;
A.
or
Objects have fallen, or liquid has been spilled into the
B.
appliance; or
The appliance has been exposed to rain; or
C.
The appliance does not appear to operate normally or
D.
exhibits a marked changed in performance; or
The appliance has been dropped, or the enclosure
E.
damaged.
Servicing - The user should not attempt to service the ap-
17.
pliance beyond that described in the operating instructions. All other servicing should be referred to qualified
service personnel.
Adjusting procedures are given in this manual which also includes a Parts List and circuit diagrams to
*
assist the service technician in maintaining the Model CR200.
*
The following accessory is supplied with CR200 as a standard.
Owner's manual, CR200: 8288407000 (for export model)
Remote control unit Model 8317: 8270829000
Audio cable (L : 1.2m): 8276912000
Power cable: 8276910000 (for USA model)
: 8276911000 (for EUR model)
Following is the packing material for the Model CR200.
Parts marked with this sign are safety critical components. They must always be replaced with identical
!
components. Refer to the Fostex Parts List and ensure exact replacement.
3
Page 4
CR200
1. CD-R THEORY
1-1. Physical layout compared to CD
The conventional CD and CD-R discs basically have the same
physical layout. However, as you can see from the Fig. 1,
comparing to the conventional CD, the CD-R disc also has socalled “minus” areas such as PCA (Power Calibration Area) and
PMA (Program Memory Area) where the temporary information
is recorded.
Φ120
max Φ118
Φ44.7
min Φ33
min Φ26
Φ15
hole
Clamping
area
Pregroove area with address (ATIP)
Center
Layout of unrecorded CD-R disc
Information area
• Unrecorded, blank disc
The information area is located next to the clamping area and the
center hole. This area contains a pregroove with CLV (Constant
Linear Velocity) clocking information and a time code.
• Partially recorded disc
The CD-R system gives the opportunity to record a disc in several
actions at a different time on a different recorder. After the first
recording, the information area is divided into five parts as shown
below and in the right.
1: Power Calibration Area (PCA)
2: Program Memory Area (PMA)
3: Lead-in Area
4: Program Area
5: Lead-out Area
• Finalized disc
After finalizing the disc, the CD-R disc will become compatible
with the RED Book (for regular CD) definitions and specifications.
Therefore, it can be played back on conventional CD players. The
Information Area of a finalized disc consists of three parts:
1: Lead-In Area
2: Program Area
3: Lead-Out Area
max Φ118
max Φ116
Φ50
Φ46
Φ44.7
PCA
Table Of Contents (TOC)
temporary
PMA
MUSIC
Program
Area
Lead-in Area
recorded
part
Recordable
User Area
+ Lead-out Area
Layout of partially recorded CD-R disc
max Φ118
max Φ116
Φ50
Φ46
final Table of Contents (TOC)
Lead-in Area
recorded part
MUSIC
Program Area
Layout of recorded CD-R disc
max Φ118
max Φ116
Φ50
Φ46
recorded part
MUSIC
TOC
Layout of conventional CD disc
Lead-out
Area
Lead-out
Area
Fig. 1 Cross Section of CD-R & CD Disc
4
Page 5
1-2. Pregrooved track wobbling + ATIP
When manufacturing the CD-R disc, it has been ÒpregroovedÓ. This pregroove in the CD-R disc is not a perfect spiral but
is wobbled so that the CD-R disc can be recognized by a CD-R recorder even when it is completely blank.
It has many purposes. It not only helps keep the servo on an exact tracking of outgoing spiral but also the demodulated
wobbling frequency contains the time information in digital format (21.05 kHz = Ò0Ó, 23.05 kHz = Ò1Ó). These frequencies
have been selected so that the mean frequency is equal to Fs / 2 (= 22.05 kHz). Also the interleaved is the manufacturer's
measured default laser power level.
0.6µm
(track width)
1.6µm
(track distance)
CR200
22.05 ± 1kHz = ~ 60µm
Fig. 2 Structure of Pregrooved Disc
1-3. PCA + consequence
Each recorder has a tolerance in the laser power and the dye from different manufacturers varies. In order to optimize the
recorder / disc combination, there is a PCA (Power Calibration Area) included in the CD-R disk. This area consists of two
parts, the Count Area and Test Area. In the Test Area, test recordings are made, stepping through several power levels. After
playing back the recorded test signal, the optimum level is automatically determined. This value is memorized until the disk
tray is opened. The Count Area keeps the track on how many of the test areas have been used indicating where to start the
next test. The PCA is designed to accommodate for 100 tests. When the PCA is full, the default value written in the wobbled
groove is used instead.
Test Area
PCA
Count Area
PMA
Lead In
Area
Partition
100
98
4321
98
531
Fig. 3 Organization of PCA, PMA and Lead-In Area
CAUTION :
Every time the CD-R disc is inserted, one test is performed. Also if you leave the disc in the recorder at power off, a test will
be performed when powering on. This might lead to the situation that the PCA might be fully used up even if there is a
remaining space to record audio signal. The recordings made after the PCA is fully used up will not be optimal in performance.
5
Page 6
CR200
6
6
6
1-4. CD-R Disc Structure and Bubbling Process
Label
The materials of CD-R disc consists of label,
protective layer, reflective layer, organic dye
layer and transparent substrate.
2345678901234567890123456789012123456789012345
2345678901234567890123456789012123456789012345
2345678901234567890123456789012123456789012345
Transparent
UV protective layer
Refective layer
Organic dye layer
substrate
Land
Groove
Laser beam
Fig. 4 Cross Section of CD-R disc
During recording, the laser is tracing the wobbled groove. When a pit is to be recorded, the laser fires off a high power beam
and the organic dye will become black and deformed. This is the way a Ònon-reflectiveÓ part is created. When a groove is
to be recorded, the laser is not fired and the high-reflective surface is maintained. If the data word contains successive the
same information (e.g. 111 or 000), the pit will be continuous. When the data word contains changes, the pit - groove status
will also change.
• Recording Principle
A high power laser beam is shot.
• Playback Principle
NO PITS
A low power laser beam is shot
and high reflectance is obtained.
Organic dye becomes black
and pit is created.
ON PITS
A low power laser beam is shot
and only low reflectance is obtained.
Fig. 5 Recording & Playback Principle
1-5. Finalize
In order to be playable on an ordinal CD-player, the CD-R disc must have a corresponding data for TOC (Table Of Contents).
This area is not used until all the recording is completed. Instead, a special area called PMA (Program Memory Area) is used.
When the disk is full or all the recording is completed, the disk can be finalized. This means that the temporary information
in the PMA is checked and transferred to TOC. Now the disk is playable on an ordinal CD player but it will not be recordable
any more.
6
Page 7
2. SPECIFICATIONS
FUNCTIONS
Sampling rate converterFs : 48 kHz / 32 kHz → 44.1 kHz
Automatic disk distinction
Time display switching
Synchronous to one song / All songs / DAT ID
REC mute
Automatic power calibration
Automatic track increment
Manual track increment
Automatic REC PAUSE
PreviousEnd section of previous track can be reproduced during REC
PAUSE mode.
Fader in / fader outCan be controlled only by infra-red remote controller
Disk remaining time display
Sampling monitor
Skip play
Track skip on / offCan be controlled only by main unit key
One song / all songs program repeatCan be controlled only by infra-red remote controller
Program play
Manual search
Track search
Direct searchCan be controlled only by infra-red remote controller
Program setting / clearCan be controlled only by infra-red remote controller
Input sensitivity switchSW 1 (+4 dBu / -8 dBu, rear panel)
Infra-red remote controller on / off switchSW 2 (rear panel)
Digital out on / off switchSW 2 (rear panel)
Copy bit setting switchSW 2 (No restriction / One time only / Prohibited, rear panel)
CR200
FL DISPLAY CONTENTS
PLAY
REC
PAUSE
REPEAT
1-REPEAT
AUTO TRACK No.
PROGRAM
TOC
Level meter
Track number
Input sampling frequency
Elapsed time
Remaining time
Total time
Remaining record time
7
Page 8
CR200
GENERAL
ModelCompact disc recorder
Applicable discsCDs and CD-Rs
Number of channels2 channels (stereo)
Power supplyAC 120 V, 60 Hz
AC 220 ~ 230 V, 50 / 60 Hz
Power consumption21 W
Weight (without package)6.2 kg / 13.7 lbs
Maximum dimensions482 (W) x 134 (H) x 294 (D) mm
18-31/32 (W) x 5-9/32 (H) x 11-9/16 (D) inch
AUDIO UNIT
Playback (CD)
Frequency characteristics4 Hz ~ 20 kHz ± 1.0 dB
S/N83 dB or more (EIAJ)
Dynamic range83 dB or more (EIAJ)
Total harmonic distortion0.01 % or less (EIAJ)
Channel separation90 dB or more (EIAJ)
De-emphasis deviation0 ± 1.5 dB or less (EIAJ)
Level difference between channels1.0 dB or less (EIAJ)
Output voltage2.4 V ± 0.3 V rms
Monitoring (analog RCA pin input)
Frequency characteristics4 Hz ~ 20 kHz ± 1.0 dB
S/N83 dB or more (EIAJ)
Dynamic range83 dB or more (EIAJ)
Total harmonic distortion0.01 % or less (EIAJ)
Maximum input level3.2 V rms or more
Minimum input level0.4 V rms or less
Record & Playback (analog RCA pin input)
Frequency characteristics4 Hz ~ 20 kHz ± 1.0 dB
S/N83 dB or more (EIAJ)
Dynamic range83 dB or more (EIAJ)
Total harmonic distortion0.01 % or less (EIAJ)
Monitoring (Digital coaxial input)
Frequency characteristics4 Hz ~ 20 kHz ± 1.0 dB
S/N95 dB or more (EIAJ)
Dynamic range90 dB or more (EIAJ)
Total harmonic distortion0.01 % or less (EIAJ)
Maximum input level0.6 V rms or more
Minimum input level0.2 V rms or less
Record & Playback (Digital coaxial input)
Frequency characteristics4 Hz ~ 20 kHz ± 1.0 dB
S/N90 dB (analog) / 105 dB (digital)
Dynamic range90 dB (analog) / 95 dB (digital)
Total harmonic distortion0.01 % (analog) / 0.003 % (digital)
Even if nothing is wrong with the pickup section and hardware components in the circuits, due to the misalignment of
various adjustments, there is a possibility that the CR200 does not work properly or at all. According to the following
procedures, make adjustments correctly.
Test equipment and adjusting tools
• Dual trace oscilloscope, 100MHz or higher bandwidth
• Sinewave signal generator
• Test disk: TCD-785 (Almedio) and STD-R03 (Pioneer)
• Low pass filter
15k½ + 0.001µF x 2 pcs.
39k½ + 0.001µF x 1 pc.
• High pass filter
3.9k½ + 180pF x 1 pc.
• Resistor
100k½
• Hex wrench: 1.27mm diagonal
• Regular tools such as a pair of tweezers, cutter, long-nose pliers and minus screw driver
• Ceramic screw driver. Vessel 9000 series are recommended.
• Digital multimeter (measuring voltage: less than 1mV)
Table of adjusting item / test point / pot
Adjustment 1
No.
Playback power adjustment
1
Coarse focus offset adjustment
2
Coarse skew adjustment
3
Coarse grating adjustment
4
DPP (tracking offset) adjustment
5
Fine focus offset adjustment
6
Fine skew adjustment
7
Grating readjustment
8
Item
Test Point
CN104 Pin-7 (PWAJT)
CN204 Pin-1 (RF)
CN204 Pin-1 (RF)
(1) Use a 10 : 1 probe for the oscilloscope.
(2) All the knob positions (settings) for the oscilloscope in the adjustment procedures are for when a 10 : 1 probe is used.
Test Mode
This model has a test mode so that the adjustments and checking required for servicing can be carried out easily.
When this model is put into test mode, the keys on the front panel would work differently from normal condition.
Adjustments and checks can be carried out by operating these keys with the correct procedures. On this model, all
adjustments are carried out in test mode.
[ Setting to Test Mode ]
The way to set this model into test mode.
(1) Plug the power cord back into the AC socket.
(2) Shorten the test mode lands. (See Fig. 6.)
(3) Press the Power SW ON.
When the test mode is set correctly, the display is different from what it usually is when the power is turned on. (lights up
all FL display) If the display is still the same as usual, test mode has not been set correctly, so repeat Steps 1 Ð 3.
CR200
[ Release from Test Mode ]
Here is the procedure for releasing the test mode.
(1) Press the STOP key and stop all operations.
(2) Press the Power SW OFF.
[ Operations of the Keys in Test Mode ]
Code Key Name Function in Test ModeExplanation
DIGITAL
SYNCHRO
FINALIZE
PLAY
PAUSE
Playback laser diode ONLights up the laser diode by playback power.
The laser diode is lit up and the focus actuator is lowered,
then raised slowly and the focus servo is closed at the point
where the objective lens is focused on the disc.
With the player in this state, if you slightly rotate the stopped
Focus servo closes
Spindle servo ON
Tracking servo close/open
disc by hand, you can hear the sound of focus servo. If you
can hear this sound, the focus servo is operating correctly.
If you press the key with no disc mounted, the laser diode
lights up, the focus actuator is pulled down, then the
actuator is raised and lowered three times and returned to
its original position.
Starts the spindle motor in the clockwise direction and when
the laser rotation reaches the prescribed speed (about 500
rpm at the inner periphery), set the servo in a closed loop.
Pressing this key when the focus servo and spindle servo
are operating correctly in closed loops puts the tracking
servo into a closed loop, displays the track number being
played back and the elapsed time on the front panel.
If the elapsed time is not displayed or not counted correctly,
it may be that something is out of adjustment, or that there is
some other problem.
This key is a toggle key and open/close the tracking servo
alternately. This key has no effect if no disc is mounted.
15
Page 16
CR200
y
y
g
CodeKey NameFunction in Test ModeExplanation
Moves the pickup position toward the inner diameter of the
disc. When this ke
MANUAL/
TRACK
•
SEARCH REV
MANUAL/
TRACK
•
SEARCH FWD
STOP
OPEN/CLOSE Disc tra
RECORD
Carriage reverse
(inwards)
Carriage forward
(outwards)
Stop
open/close
Maximum recordin
Laser diode ON
power
REC MUTE
AUTO/
MANUAL
WRITE(MANUAL) LED Lights UP: Optical axis servo ON
TIME0 sec.) of disc.
Focus offset servoCOPY BIT LED Lights UP: C/N in the best condition
Optical axis servo
switching
Search to the lead of disc.
(It works only CD-R use.)
closed loop, the tracking servo automatically goes into an
open loop.
Since the motor does not automatically stop at the
mechanical end point in test mode, be careful with this
operation.
Moves the pickup position toward the outer diameter of the
disc. When this key is pressed with the tracking servo in a
closed loop, the tracking servo automatically goes into an
open loop.
Since the motor does not automatically stop at the
mechanical end point in test mode, be careful with this
operation.
Initializes and the disc rotation stops.
The pickup and disc remain where they are when this key is
pressed.
Open/close the disc tray. This key is a toggle key and
open/close tray alternately.
Pressing this key when the disc is turning stops the disc,
then opens the tray.
This key operation does not affect the position of the pickup.
Lights up the laser diode with maximum recording power and
normal EFM by pressing REC and REC MUTE keys in order.
* The laser diode may be damaged if adjustments are made
before pressing these keys.
Switches the focus offset state.
Lights OFF: Jitter in the best condition
Switches the ON/OFF of the optical axis servo.
Light OFF: Optical axis servo OFF
When using the CD-R disc, search to the lead (0 min.
(It doesn't work in CD disc use.)
is pressed with the tracking servo in a
16
[ How to Play Back a Disc in Test Mode ]
In test mode, each servo operates independently. Thus, it is required to press the keys and close the servo in a correct order
so that a disc can be played
Here is the key operation sequence for playing back a disc in test mode.
FINALIZE
PLAY
PAUSE
Wait at least 2 ~ 3 seconds between each of these operations.
Lights up the laser diode and closes the focus servo.
Starts the spindle motor and closes the spindle servo.
Closes the tracking servo.
Page 17
4.2 Adjustment 1
4.2.1 Playback Power Adjustment
DANGER - LASER RADIATION WHEN OPEN.
AVOID DIRECT EXPOSURE TO BEAM.
• ObjectiveTo optimize the playback power of the laser diode.
• Symptom when out of adjustmentDoes not start playing, track search is impossible, tracks are skipped.
Press the FINALIZE key and the PLAY key in the order to close the focus servo and then the spindle servo.
(1)
Adjust VR105 (FE. OFS) so that the amplitude of waveform at CN204 (TP201), Pin-1 (RF) is maximum.
(2)
NOTE:
The oscilloscope displays a moving image, not a ÒSTILLÓ image as shown below. In order to verify that the focus
servo is on, tap on the machine gently and listen to the sound indicating the servo operation.
Out of adjustment
(Waveform amplitude is at maximum.)
Optimum adjustment
Fig. 10
18
Page 19
4.2.3 Coarse Skew Adjustment
• ObjectiveTo coarse adjust the angle of pickup to the disc for performing the grating and
DPP (tracking offset) adjustments correctly.
• Symptom when out of adjustmentSound is cracking, some discs can be played but not others.
• Measurement instrument connections Oscilloscope to CN204, Pin-1 (RF) (SERVO UCOM BOARD assy)
GND probe can be connected to CN204, Pin-4 (AGND).
[ Settings ]: 20 mV/div., 200 nS/div., AC mode
• DiscTCD-785
• Player stateTest mode, focus and spindle servos: closed, tracking servo: open
• Adjustment locationRadial adjustment screw and tangential adjustment screw
CAUTION:
Before executing this adjustment, you must cut a few wire binders, disconnect cable and loosen 4 screws so that the
HEAD BOARD assy can be tilted up and fixed into the slits.
[ Procedures ]
Move the pickup to the position where the radial/tangential adjustment screws will be seen with the MANUAL / TRACK
(1)
SEARCH FWD or REV keys so that the radial/tangential adjustment screws can be adjusted.
Press the FINALIZE key and the PLAY key in the order to close the focus servo and then the spindle servo.
(2)
(3)
Adjust the RAD (radial direction) and TAN (tangential
direction) adjustment screws alternately with hexagonal
screwdriver (1.27 mm diagonal) to maximize the RF output at
CN204 (TP201), Pin-1.
Hexagonal
screwdriver
CR200
NOTE:
Radial direction and tangential direction
mean the direction relative to the disc
shown in Fig. 11.
Radial direction
Tangential direction
Disc
Fig. 2
Radial
adjustment
screw
Tangential
adjustment
screw
FRONT PANEL
Fig. 11
19
Page 20
CR200
4.2.4 Coarse Grating Adjustment
• ObjectiveTo align the tracking error generation laser beam spots to the optimum angle on
the track.
• Symptom when out of adjustmentDoes not start playing, track search is impossible, tracks are skipped.
• Measurement instrument connections Oscilloscope to CN104, Pin-3 (TE) via a low pass filter.
(HEAD BOARD assy) See Fig. 14 below.
GND probe can be connected to CN104, Pin-4 (AGND).
[ Settings ]: 50 mV/div., 5 mS/div., DC mode
• DiscTCD-785
• Player stateTest mode, focus and spindle servos: closed, tracking servo: open.
• Adjustment locationGrating adjustment screw in the slit
[ Procedures ]
Move the pickup to the position where the grating adjustment slit will be seen with the MANUAL / TRACK SEARCH
(1)
FWD or REV keys so that the grating adjustment can be adjusted.
Press the FINALIZE key and the PLAY key in the order to close the focus servo and then spindle servo.
(2)
Insert a screwdriver into the grating adjustment slit and adjust the grating to find the null point.
(3)
For more details, see next page.
If you slowly turn the screwdriver clockwise from the null point, the amplitude of the wave gradually increases. Then, if
(4)
you continue turning the screwdriver, the amplitude of the wave becomes smaller again. Turn the screwdriver
counterclockwise from the null point and set the grating to the first point where the wave amplitude reaches its maximum.
Reference : Fig. 13 shows the relation between the angle of the tracking beam with the track and the waveform.
Return the pickup to more or less midway across disc with the MANUAL / TRACK SEARCH key. Then, press the
(5)
PAUSE key and check that the track number and elapsed time are displayed on the front panel. If they are not displayed
at this time or the elapsed time changes irregularly, check the null point and adjust the grating again.
Small
screwdriver
Grating
adjustment
CN104
(TP1)
Pin 3
(TE)
Pin 4
(AGND)
HEAD BOARD
ASSY
LPF
15kΩ
0.001
µF
(10 : 1)
screw
20
Fig. 3
Fig. 12
Page 21
[ How to find the null point ]
Turning the grating counterclockwise
Turning the grating clockwise
Null point
Grating adjustment position
Waveform of
CN104 (TP1), Pin 3 (TE)
Fig. 4
Null point waveformMaximum amplitude
waveform
Waveform other than the
null point
Note : If the difference between the amplitude of the error signal at the
innermost edge and outermost edge of the disc is more than 10%,
adjust the grating again.
When you insert the small screwdriver into the slit for the grating adjustment and change the grating angle, the amplitude
of the tracking error signal at CN104 (TP1), Pin 3 (TE) changes. Within the range for the grating, there are five or six
locations where the amplitude of the wave reaches a minimum. Of these five or six locations, there is only one at which
the envelope of the waveform is smooth. This location is where the three laser beams divided by the grating are all right
above the same track. (See Fig. 13.)
This point is called the null point. When adjusting the grating, this null point is found and used as the reference position.
CR200
Fig. 13
4.2.5 DPP (Tracking Offset) Adjustment
• ObjectiveTo correct for the variation in the sensitivity of the tracking photodiode.
• Symptom when out of adjustmentThe unit does not playback, track search is impossible, tracks are skipped.
• Measurement instrument connections Oscilloscope to CN104, Pin-3 (TE)
[This connection must be via a low pass filter (15kW + 0.001µF). ]
GND probe can be connected to CN104, Pin-4 (AGND).
[ Settings ]: 50 mV/div., 5 mS/div., DC mode
• DiscTCD-785
• Player stateTest mode, focus and spindle servos: closed, tracking servo: open.
Move the pickup to midway across the disc (R = 35mm) with the MANUAL / TRACK SEARCH FWD or REV keys.
(1)
Press the FINALIZE key, the PLAY key and the PAUSE key in the order to close the respective servos and put the player
(2)
into play mode.
Adjust VR105 (FE. OFS) so that the 3T waveform at CN204, Pin-1 (RF) is maximum.
(3)
Out of adjustmentOptimum adjustment
Fig. 15
22
Page 23
4.2.7 Fine Skew Adjustment
• ObjectiveTo adjust the angle of the pickup relative to the disc so that the laser beams are
shone straight down into the disc for the best read out of the RF signals.
• Symptom when out of adjustmentSound is cracking, some discs can be played but not others..
• Measurement instrument connections Oscilloscope to CN204, Pin-1 (RF) (SERVO UCOM BOARD assy)
GND probe can be connected to CN204, Pin-4 (AGND).
[ Settings ]: 20 mV/div., 200 nS/div., AC mode
• DiscTCD-785
• Player stateTest mode, play
• Adjustment locationPickup radial adjustment screw and tangential adjustment screw
[ Procedures ]
Move the pickup to the position where the radial/tangential adjustment screws will be seen with the MANUAL / TRACK
(1)
SEARCH FWD or REV keys so that the radial/tangential adjustment screws can be adjusted.
Press the FINALIZE key, the PLAY key and the PAUSE key in the order to close the respective servos and put the player
(2)
into play mode.
First, adjust the radial adjustment screw with the hexagonal screwdriver (1.27 mm) so that the eye pattern (the diamond
(3)
shape at the center of the RF signal) can be seen the most clearly and the amplitude is at maximum..
Next, adjust the tangential adjustment screw with the hexagonal screwdriver so that the eye pattern can be seen the most
(4)
clearly. (Fig. 17).
Adjust in the order of the radial adjustment screw and the tangential screw again, so that the eye pattern can be seen the
(5)
most clearly. As necessary, adjust the two screws alternately so that the eye pattern can be seen the most clearly.
After the adjustment, remove the float screw, turn over the servo mechanism assembly, then secure the radial adjustment
screw and the tangential adjustment screw with loc-tite.
(6)
CR200
Stabilize each screw
with an adhesive.
(Front side)
Hexagonal
screwdriver
Radial
adjustment
screw
Tangential
adjustment
screw
(Rear side)
Fig. 16
23
Page 24
CR200
Out of adjustment
4.2.8 Grating Re-adjustment
Optimum adjustment
Out of
adjustment
Optimum
adjustment
Fig. 17
Out of adjustment
Out of
adjustment
Adjust in the same manner as "4.2.4 Coarse Grating Adjustment ".
4.3 Adjustment 2
4.3.1 CD-R VCO Control Voltage Adjustment
• ObjectiveTo optimize the CD-R VCO control voltage adjustment of VCO IC.
• Symptom when out of adjustmentThe unit does not record or playback CD-R discs.
Move the pickup to midway across the disc (R = 35mm) with the MANUAL /
(1)
TRACK SEARCH FWD or REV keys.
Press the FINALIZE key and the PLAY key in the order to close the focus servo
(2)
and then the spindle servo.
Line up the bright line (ground) at the center of the oscilloscope screen and put
(3)
the oscilloscope into DC mode.
Adjust VR111 (TE. GAIN) so that the positive amplitude and negative amplitude
(4)
of the tracking error signal at CN104 (TP1), Pin 3 (TE) is 1.0V ± 0.05V.
CR200
4.3.12 Tracking Offset Adjustment
• ObjectiveTo correct for the variation in the sensitivity of the tracking photodiode.
• Symptom when out of adjustmentThe unit does not playback, track search is impossible, tracks are skipped.
• Measurement instrument connections Oscilloscope to CN104, Pin-3 (TE)(HEAD BOARD assy)
[ This connection must be via a low pass filter (15k½ + 0.001µF).]
GND probe can be connected to CN104, Pin-4 (AGND).
[ Settings ]: 20 mV/div., 5 mS/div., DC mode
• DiscTCD-785
• Player stateTest mode, focus and spindle servos: closed, tracking servo: open
Move the pickup to midway across the disc (R = 35mm) with the MANUAL / TRACK SEARCH FWD or REV keys.
(1)
Press the FINALIZE key, the PLAY key and the PAUSE key in the order to close the respective servos and put the player
(2)
into play mode.
Adjust VR105 (FE. OFS) so that the 3T waveform at CN204, Pin-1 (RF) is maximum.
(3)
Note : Adjust after confirming that the WRITE KEY LED is OFF.
CR200
Out of adjustmentOptimum adjustment
Fig. 19
31
Page 32
CR200
4.3.16 WBL Balance Adjustment
• ObjectiveTo adjust the gain balance of the wobble signal.
• Symptom when out of adjustmentThe unit does not record or search or pause CD-R discs.
• Measurement instrument connections Oscilloscope to CN104, Pin-5 (WBL) (HEAD BOARD assy)
[ This connection must be via high-pass filter (180pF+3.9kΩ).]
GND probe can be connected to CN104, Pin-4 (AGND).
[ Settings ]: 5 mV/div., 20 µS/div., DC mode
[ This connection must be via high-pass filter (180pF+3.9kΩ).]
GND probe can be connected to CN104, Pin-4 (AGND).
[ Settings ]: 5 mV/div., 20 µS/div., DC mode
Move the pickup to midway across the disc (R = 35mm) with the MANUAL / TRACK SEARCH FWD or REV keys.
(2)
Press the FINALIZE key, the PLAY key and the PAUSE key in the order to close the respective servos and put the player
into play mode.
(3)
Adjust VR108 (WBL. OFS) so that the amplitude of waveform at CN104, Pin-5 (WBL) is minimum.
CR200
Out of adjustmentOptimum adjustment
Fig. 21
33
Page 34
CR200
4.3.18 WBL Focus Offset Adjustment
• ObjectiveTo adjust the gain balance of the wobble signal.
• Symptom when out of adjustmentThe unit does not record, search or pause CD-R discs.
• Measurement instrument connections Oscilloscope to CN104, Pin-5 (WBL)(HEAD BOARD assy)
[ This connection must be via high-pass filter (180pF+3.9k½).]
GND probe can be connected to CN104, Pin-4 (AGND).
[ Settings ]: 5 mV/div., 20 mS/div., DC mode
Move the pickup to midway across the disc (R = 35mm) with the MANUAL / TRACK SEARCH FWD or REV keys.
(2)
Press the FINALIZE key, the PLAY key and the PAUSE key in the order to close the respective servos and put the
CR200 into play mode.
(3)
Press the AUTO/MANUAL key to light up the COPY BIT LED.
(4)
Adjust VR115 (WFE. OFS) so that the amplitude of waveform at CN104, Pin-5 (WBL) is minimum.
34
Out of adjustmentOptimum adjustment
Fig. 22
Page 35
4.3.19 Recording Power Adjustment
DANGER - LASER RADIATION WHEN OPEN.
AVOID DIRECT EXPOSURE TO BEAM.
• ObjectiveTo optimize the recording power of the laser diode.
• Symptom when out of adjustmentThe unit does not either record or playback self-recorded discs. It also skips
tracks and the RF waveform is dirty. (No problem shown during CD playback)
• Measurement instrument connections Multimeter to CN104, Pin-7 (PWAJT) (HEAD BOARD assy)
GND probe can be connected to CN104, Pin-4 (AGND).
• DiscNone needed
• Player stateTest mode, maximum recording power ON
Perform this adjustment more than 5 minutes after starting up the test mode.
(a)
Power more than ten times greater than playback power is released during these adjustment. Never look directly at the
(b)
objective lens.
This adjustment cannot be performed accurately if disc is inserted. Be sure to remove disc first before adjustments.
(c)
The laser diode may be damaged if the recording power is greater than the specified value. Always perform the step 1
(d)
below before making adjustments and be careful not to exceed the adjustment value by more than 50mV from the
specified value in the step 3 below).
CR200
[ Procedures ]
• When Adjusting with the multimeter
(1)
Fully turn VR104 (REC. PW) counterclockwise to reduce the power to the minimum.
(2)
Press RECORD and REC MUTE keys in this order to lights up the laser diode.
(3)
Adjust the voltage value of Pin 7 (PWAJT) of CN104 to the voltage value (REC. PW voltage ± 10mV) displayed on the
pickup flexible cable using VR104 (REC. PW).
• Reference: When adjusting with optical power meter
CAUTION:
(a)
Perform this adjustment more than two minutes after starting up the test mode (after inserting the AC plug).
(b)
The laser diode may be damaged if the recording power is greater than the specified value. Always perform step 1 before
making adjustments and be careful not to exceed the adjustment value by more than 0.3mW (specified value in step 3).
(c)
Power more than ten times greater than playback power is released during this adjustment. Never look directly at the
objective lens.
35
Page 36
CR200
[ Procedures ]
Fully turn VR104 (REC. PW) counterclockwise to reduce the power to the minimum.
(1)
Move the pickup to the outer edge of the disc with the MANUAL / TRACK SEARCH FWD key.
(2)
Press RECORD and REC MUTE keys in that order to lights up the laser diode.
(3)
Shine the light discharged from the objective lens in the pickup on the light power meter sensor and adjust VR104 (REC.
(4)
PW) so that the recording laser diode output is an average of 4.7mW ± 0.1mW (Wavelength 790nm, Average mode).
P : Playback Power
R : Recording Power
4.3.20 HF Amp. Gain Adjustment
• ObjectiveTo correct the discrepancy in the HF level with the pickup.
• Symptom when out of adjustmentThe unit does not record, track search is impossible.
¥Seek to TOC area.
¥Turn on Focus servo.
¥Spindle kick and turn on CAV servo.
¥Distinguish disc.
¥Adjust tracking gain.
¥Turn on Tracking servo.
¥CD Turn on Spindle EFM servo.
¥CD-R Turn on Spindle Wobble servo.
TOC read
¥CD Read TOC information.
¥CD-R Read ATIP special information.
Is battery okay ?
Yes
Disc and TOC exist ?
No
Confirmed by
RAM (IC352) checksum.
Confirmed by
backed up data in RAM.
Yes
STOP
¥Turn off servo.
¥Stop spindle.
¥Seek to end of TOC area.
(Home Position)
Operation image (carriage movement)
NoYes
EndEnd
(STOP mode)
Is there
PLAY request ?
4
SEARCH
¥Search to requested track
no. or ABS time.
¥Turn off mute.
(PLAY mode)
(Searching TOC area three times at max.)
No
2
PMA read
¥Search beginning position of PMA.
¥Read PMA data.
3
Search to 00:00:00
¥Search absolute time 00:00:00.
¥Measure disc rotation ratio.
Is disc CD-R ?
Yes
1
1
2
3
PLAY
4
49
Page 50
CR200
(5) Operation Flow Chart 2
STOP to PLAY sequence.
(From STOP mode)
Press PLAY key.
SETUP
¥Seek to TOC area.
¥Turn on Focus servo.
¥Turn on Spindle servo (CAV).
¥Turn on Tracking servo (CLV).
SEARCH
Track count search
1
Using N track move, search to destination coarsely.
This operation is repeatedly executed unless
position is closed within 500 track. Zigzag search is
used afterwards.
Operation image
2
96, 48, 32, 16 track FWD/RWD jump.
3
10 track FWD/REV jump.
4
1 track FWD/REV jump.
PAUSE
PLAY request ?
No
1 track REV jump
Unit actually locates to
the position 5 frame before
desired destination.
Yes
No
Desired
Destination ?
Yes
End
(PLAY mode)
Velocity
1
Distance
Tracking Error Waveform
2
About 16 - 96 track
3
50
About 10 track
4
1 track
Page 51
(6) Operation Flow Chart 3
STOP to REC sequence.
(From STOP mode)
Start recording.
SETUP
Same as ÒSTOP to PLAY sequenceÓ.
No
OPC
Execute test recording (sweep recording)
1
at inner section of disc (power calibration
area).
Execute OPC ?
Yes
If OPC (Optical Power Calibration) is
already executed on presently inserted
disc after powering on, no more OPC
will be executed.
ATIP
sync
The optimum recording power is automatically adjusted
by making 15 levels of sweep recording every 13.3ms.
1 ATIP (sub code) frame : 13.3ms
1 2 3 4 5 6
13 14 15
CR200
2
Playback recorded area.
Upon result of playback, optimum power
3
is decided.
SEARCH
Search section to be recorded continuously
(end of last recording section).
REC - PAUSE
REC request ?
No
Pass through
end of recording
1 track REV jump
No
section ?
Yes
Yes
Recording
power
Reproduce
RF waveform
(AC coupled)
REC
¥Set EFM Encoder and Servo circuit to REC
mode.
¥Output optimum recording power obtained
by OPC.
End
(REC mode)
51
Page 52
CR200
(7) Operation Flow Chart 4
STOP to OPEN sequence.
(From STOP mode)
Press OPEN/CLOSE key.
No
No
Arrange data to be recorded in PMA.
SEARCH
Search section to be additionally recorded
in PMA.
PMA REC
Record PMA data additionally.
STOP
¥Turn off servo controling.
¥Stop rotating spindle.
CD-R disc ?
Yes
PMA REC required ?
Yes
If addional recording is made or skip information is
changed on disc presently inserted, data has to be
added to PMA before disc is ejected.
During these operations,
will blink.
52
OPEN
¥Release disc clamper.
¥Open disc tray.
End
(REC mode)
Page 53
(8) Timing Chart
Timing chart when powering on
1
2
POWER (IN)
XRST (IN)
XPFAIL (IN)
RAME
XSVRST
MACK (IN)
XTAL OFF
1) Turn on the power.
2) XRST goes ÒHÓ and reset is turned off.
3) After reset is turned off, the unit stands by till XPFAIL goes ÒHÓ.
4) After XPFAIL goes ÒHÓ, the microprocessor starts operating. RAME goes ÒHÓ and the external RAM is put into ÒenableÓ condition.
5) XSVRST goes ÒHÓ and the servo circuit starts operating.
POWER (IN)
XRST (IN)
XPFAIL (IN)
XSVRST
RAME
1) If power supply voltage drops and at a certain level, XPFAIL goes ÒLÓ.
2) When XPFAIL is at ÒLÓ, the unit is in internal interruption mode and the Current Operation mode and disc data wiill be backed up.
3) At the same time, XSVRST goes ÒLÓ and the servo circuit will be reset. RAME goes ÒLÓ and the external SRAM will be disabled.
4) XRST also goes ÒLÓ and is reset.
CAUTION : If XRST goes ÒLÓbefore RAME goes ÒLÓ, value of backup RAM (IC352) will not be memorized correctly.
Timing chart when in blackout.
About 100us
About 5ms
1)
2)
3)
4)
5)
CR200
53
Page 54
CR200
Seek track 0
3
Carriage moves toward the TOC area (Home Position).
Carriage movement will be decided by the TOCP condition.
Signal
TOCP (IN)
Command
Start the operation 1 .
Move to
inner direction.
Program Area
Limit 3.4SLimit 300msLimit 500ms
23 : Tracking OFF
Slider REV
Start the operation 2 .
Move to
outer direction.
TOC Area
22 : Tracking OFF
Slider FWD
Move to
inner direction
at slow speed.
Program Area
23 : Tracking OFF Slider FWD
30 : Slider at slow speed command
20 : Tracking and Slider OFF
33 : Slider at high speed command
STOP
TOC Area
Focus ON
4
Signal
FCSON
(Servo signal)
FOK
BUSY
(Decoder
internal signal)
Command
Auto Focus condition
Focus
down
9B20 : DCLV, ASEQ = 1, DPLL = ON, FLFC = H
33 : Slider kick height + 4
40 : Auto sequence OFF
02 : Focus servo OFF, Focus gain NORMAL, Search ON, Focus DOWN
Focus down when
Òno discÓ condition
is detected 3 times.
600ms
200ms
Focus in when disc
is inserted.
600ms
54
55 : Blind time 0.112ms
47 : Start Auto Focusing
OC : Focus servo ON, Focus gain DOWN
Page 55
(9) Tracking Error Gain Adjusting Flow Chart
Focus servo ON
Spindle CAV servo
Tracking servo OFF
START
•SSEL output H = Reset of TEPP hold circuit is cancelled.
•Setting of Tracking Gain 7 STEP (Judgement STEP)
•Stand by till the disc makes one rotation.
•Detect if thre is a RF signal or not.
CR200
•SSEL output H = Reset of TEPP hold circuit is cancelled.
•Stand by till the disc makes one rotation.
•Calculate TEPP value in every 13.3ms.
No
Calculate 9 times ?
Yes
•SSEL output L = TEPP hold circuit is reset.
•Average TEPP value obtained in the Judgement STEP.
RF signal ?
No
•Recognize disc as CD-R temporarily.
Yes
•Recognize disc as
CD temporarily.
•Calculate TEPP value in every 13.3ms.
No
Calculate 9 times ?
Yes
•SSEL output L = TEPP hold circuit is reset.
•Average TEPP value obtained in the Optimum STEP.
TEPP value in the
Optimum STEP in the CD/CD-R
at optimum range ?
No
•Present STEP is memorized
as Optimum STEP and the
adjustment will be completed.
Yes
By average TEPP value, an Optimum STEP for CD
and CD-R will be set temporarily and the mode is
changed to Optimum STEP.
NOTE : Precise Optimum STEP
=
Decision STEP TEPP value - Optimum STEP TEPP value
Decision STEP - Optimum STEP
Precise Optimum STEP is calculated by Decision STEP,
Decision STEP TEPP value, Optimum STEP, Optimum
STEP TEPP value and CD/CD-R optimum TEPP value.
This STEP is memorized in the Optimum STEP and the
adjustment will be completed.
CD/CD-R Optimum
TEPP value
Optimum STEP
-
TEPP value
+ Optimum STEP
55
Page 56
CR200
(10) Tracking Gain Adjusting Timing Chart(11) Loading Control for Turntable
Optimum TEPP value : 2.494V ± 0.103V (2.372 - 2.649V)
2.26V ± 0.103V (2.157 - 2.372V)
1) Example when the gain increases to the maximum
after the disc gain decreases.
TEPP
7 STEP
About 200ms
13 STEP
About 200ms
SSEL
2) Example when the gain increases after the disc
gain decreases.
TEPP
7 STEP
About 200ms
9 STEP
About 200ms
SSEL
3) Example when the gain decreases to the minimum
after the disc gain increases.
TEPP
7 STEP
About 200ms
7 STEP
About 200ms
Optimum
TEPP value
Optimum
TEPP value
Optimum
TEPP value
OPEN/CLOSE control & SW condition
The figure below indicates the relationship of loading
input/output by the timing chart.
Loading
condition
OPENCLOSEIn between
XCLMP
While
Loading
TIME
LIN
LOUT
While
opening
Loading request
LIN
LOUT
Open request
TIME
SSEL
(12) Spindle Servo Selection in STOP PLAY SEARCH Operation on CD-R
TER
Spindle
rotation
speed
CVL (H)/
CAV (L)
EFM (H)/
WOBBLE (L)
MODE
STOP
Focus
ON
WOBBLE CLV
CAV
Accelerate
Spindle
CAV
Search
completed
Start searching
track 1
→→
WOBBLE CLV
EFM CLV CAV
Start searching
track 10
WOBBLE
CLV
EFM CLVCAV
Search
completed
WOBBLE
CLV
Start searching
track 1
EFM CLVCAVSTOP
Search
completed
STOP procedure
completed
Start
STOP procedure
500ms/div.
1
2
3
4
56
SETUPTRACK 1 PLAYTRACK 10 PLAYTRACK 1 PLAYSTOP
Page 57
PD4760A9 (IC351) on the SERVO UCOM BOARD ASSY
(1) General Function
1. Operation key input analysis
The key matrix method is adopted by 5 output x 4 input (20
key max.).
The KEYIN0 is also used as a test mode detection port when
powering on.
4. Display Output
FL display :
LED :Direct driving (REC indicator, manual, track
CR200
Dynamic scan method.
Sound quality improvment is realized by Display OFF.
increment)
2. Remote controller input analysis
It corresponds to the two-fold cord complying to the universal
standards. [It receives CD-R remote commands (A3**,
AF**).]
3. Parallel remote controller input analysis
The CR200 receives the key input from DIN 8-pin connector
on the rear panel.
The input command can be distinguished by the analog data
(0 ~ 5V) applied to pin-28.
The table below indicates the relationship between the analog
data and key distinction.
Analog
Data (V)
4 ~ 4.5
4.5 ~ 5
3.5 ~ 4
2 ~ 2.5
3 ~ 3.5
1.5 ~ 2
1 ~ 1.5
2.5 ~ 3
MANUAL TRACK NO
Key
Distinction
STOP
REV TRACK
REC
Not used.
PLAY
FWD TRACK
PAUSE
Pin No. of
DIN connector
8
7
6
5
4
3
2
1
5. Communication with mechanical contorl microcomputer
Reading/Transferring of information on mechanical opeation,
disc and time information inside disc, skip information.
6. Communication with LSI (LC89585)
Reading of information such as C bit, U bit, Unlock.
Reading of data for level meter
Swiching and setting of digital interface
Controlling of digital circuit
Controlling of attenuator
Controlling of digital memory delay circuit
7. Controlling of Fs converter (PDC020A)
Controlling of Fs converter
Controlling of parallel output
8. Audio Circuit
Controlling of DAC, emphasis
Turning on/off of crystal
TK16124M (IC333, 334, 340) on the STRATEGY BOARD ASSY
(1) Block Diagram
VCC
GND
VOUT
1
TTL - ECL
Interface
DELAY
Circuit
2
Reference
TTL - ECL
Interface
3
Output
Circuit
VIN
6
GND
5
VCR
4
62
Page 63
PEL1086 (V701) on the FUNCTION BOARD ASSY
FL INDICATOR TUBE
PATTERN AREA
Grid Assignment
Anode Connection
11G10G9G8G7G6G5G4G3G
3G9G7G2G
1G
ee
e
ee
e
e
e
e
e
e
ff
f
ff
f
f
f
f
f
h
h
h
h
hh
h
h
h
h
h
h
h
h
h
f
g
g
g
gg
gg
g
g
g
gg
g
g
g
g
g
g
i
i
i
iii
i
i
i
i
i
i
j
j
j
j
j
j
jjjjjjj
j
j
k
k
k
kkk
k
k
k
k
k
k
k
a
aa
a
a
aa
a
a
a
a
b
bb
b
b
b
bb
b
b
bb
c
c
c
c
c
c
c
c
c
c
c
c
ddd
ddd d
d
d
d
d
11G
a
b
c
d
e
f
g
h
i
j
k
a
b
c
d
e
f
g
h
i
j
a
b
c
d
e
f
g
h
i
j
k
a
b
c
d
e
f
g
h
i
j
k
a
b
c
d
e
f
g
h
i
j
k
a
b
c
d
e
f
g
h
i
j
k
a
b
c
d
e
f
g
h
i
j
k
a
b
c
d
e
f
g
h
i
j
k
a
b
c
d
e
f
g
h
i
j
a
b
c
d
e
f
g
h
i
j
k
10G9G8G7G6G5G4G3G2G1G
Pin Connection
Connection1F1
Pin No.
2F13
NP
CR200
4
5
6
7
8
9
10
11
12
13
14
P
P
P
P
P
P
P
P
P
P
a
b
c
d
e
f
g
h
i
P
j
k
15
11G
16
10G
17
9G
NOTES :1) F : Filament 2) G : Grid 3) P : Anode 4) NP : No Pin
Pin No.
Connection188G
197G20
215G22
6G
4G
23
3G
24
2G
251G26
NP
27NP28NP29NP30
31NP32NP33NP34F235
NP
F2
63
Page 64
CR200
5.3 DISASSEMBLING
(1) REMOVE THE TRAY PANEL
Hold the tray panel with your hands as shown in Fig. 1, and
grasp the tray with your thumbs and then lift the tray panel
up while pulling it toward you with the other fingers. (Fig. 2)
(3) REMOVE AND SET UP THE HEAD BOARD ASSY
Remove the rack mount angle L, R and bonnet.
1.
Remove the tray panel (Refer to section 1).
2.
Remove the five screws of the front panel and remove a
3.
screw of HEADPHONE BOARD ASSY.
4.
Remove the under panel to sliding it towards the right.
Tray panel
Pull
Fig. 1
1
Rack mount
angle L
1
3
3
(Right side)
HEADPHONE
BOARD ASSY
3
3
Front panel
4
Under panel
5.
Pull out the right side of the front panel to the front and
3
4
Fig. 4
Rack mount
angle R
remove the four screws of the board.
HEAD BOARD
ASSY
Front panel
Screw
Fig. 5
Fig. 2
(2) INSTALL THE TRAY PANEL
Align the tray panel with the grooves located at both edges
of the tray. And then press it down till it stops. (Fig. 3)
Tray panel
Tray
Fig. 3
Remove the fixtures of the wires connected to the board
6.
(cord holder, PCB binder).
Place the HEAD BOARD ASSY upright against the slit
7.
of the float base.
HEAD BOARD
ASSY
Slit
Cord holder
Loosen
(Unfasten the
fixed wire rod)
Float base
Servo mechanism
assy TT
Fig. 6
Slit
64
Page 65
6. EXPLODED VIEWS AND PARTS LIST
NOTES:
• Parts marked by “NSP” are generally unavailable because they are not in our Master Spare Parts List.
• The mark found on some component parts indicates the importance of the safety factor of the part.
Therefore, when replacing, be sure to use parts of identical designation.
• Screws adjacent to mark on the product are used for disassembly.
6.1 PACKING
(1) PARTS LIST
Mark No. DescriptionPart No.
1 Audio cable (L : 1.2m)8276 9120 00
13
1
6
4
5
7
3
NSP3 Caution
NSP5 Battery Cover
NSP6 Dry Cell Battery (R03,AAA)
NSP7 Polyethylene Bag
NSP8 Sheet
The CR200 displays the “CHECK” or “CHECK” “DISC?” prompts during abnormal operations and it stops.
•
When the STOP or CLEAR key on the remote control unit Model 8317 is pressed continuously for about 10 seconds, the
last service number will be displayed even though the CR200 is once turned off and back on.
•
To correct the error, check the “Checkpoint” device and its surrounding circuit indicated in the table below.
8-2. Service Codes and Countermeasures
Code
H0
H1
H2
H5
L*
E*
P*
C*
F*
A*
B*
Contents
Unit does not operate.
Recording preparations
cannot be performed and
tray does not open.
(“CHECK” is displayed.)
Recording is impossible.
(“CHECK” is displayed.)
Unit stops operating while
tray is open/close.
(“CHECK” is displayed.)
Operations stop when disc
is inserted, playback start
is requested, REC/PLAY is
requested and operations
are acknowledged.
(“CHECK” is displayed.)
Unit stops when disc is
inserted without reading
internal information.
(“CHECK” is displayed.)
Operations stop before
REC/PLAY is set.
(“CHECK” is displayed.)
Operations stop before
playback or recording.
(“CHECK” is displayed.)
“CHECK” “DISC” is
displayed and unit stops
during operations related
to recording.
Same as “A*” above.
Internal information on disc
cannot be read. Unit stops
when disc is inserted.
Location of fault
H0:
Communication is not properly made
between mechanism and mode controllers.
H1:
Fault on mechanism controller is detected.
H2:
Voltage error on Mechanism controller pin22, 23 and 24.
(See page 42 to check voltage.)
IC360
Fault on loading section is detected.
Fault on slider section is detected.
• Pickup cannot be moved to designated position.
Fault on spindle section is detected.
• Disc is placed upside-down.
• Disc with scratches or dusts is inserted.
• Disc does not rotate regularly.
• Designated signal cannot be obtained from disc.
Fault on recording laser power is detected.
• Disc with scratches or dusts is inserted.
• Proper recording power is not output.
• RF is not properly detected.
Fault on pickup section is detected.
•
Disc with scratches, dusts, etc obstructs
operations and unit stops.
• Proper laser power is not output.
• Not focused.
Stop is detected during recording.
Disc with scratches, dusts, etc obstructs
•
operations and unit stops.
Cause
• Faulty soldering
• PCB pattern is shorted or open.
• Parts next to each other is shorted.
• Faulty power supply
• IC 360 is faulty.
• Faulty tray position sensor.
• Faulty loading motor.
• Faulty soldering
• PCB pattern is shorted or open.
• Faulty power supply.
• Flexible cable is not properly connected.
• Faulty drive circuit.
• Faulty TOC position SW.
• Faulty soldering.
• PCB pattern is shorted or open.
• Faulty power supply.
• Faulty spindle motor.
• Faulty spindle drive circuit.
• Error in FG detection.
• Faulty WBL circuit.
• ATIP or subcodes cannot be read.
• Error rate is high.
• Faulty laser diode.
• Error in RF detection.
• Faulty RFT, RTB circuit.
• Insufficient recording power.
• Faulty soldering.
• PCB pattern is shorted or open.
• ATIP or subcodes cannot be read.
• Faulty laser diode.
• Faulty focus drive circuit.
• Faulty pickup.
• Faulty soldering.
• PCB pattern is shorted or open.
• Faulty power supply.
If hardware problems occur before A* or
B* is displayed, unit stops with displaying
service codes other than these.
Consequently, these service codes are
displayed only when disc is faulty.
Faulty soldering, shorted / open PCB
pattern and faulty power supply would
cause same symptom.
Checkpoint
IC356, IC357,
IC207, IC358,
IC352, IC353
IC205
IC360
IC203
D1001, IC203,
IC201, IC206
PC1001, IC202,
IC201, IC206
IC205, IC101,
IC362, IC363
IC206, IC203
CR200
89
Page 90
CR200
NOTE : * indicates the mechanism mode listed in the chart below.
No.
0
1
2
3
4
Mechanism Mode
PLAY
OPEN
STOP
-
-
No.
5
6
7
8
9
Mechanism Mode
SETUP
TOC read
SEARCH
REC/PAUSE
8-3. Judging Method of Unit
1. Look into the symptom thoroughly
•
Check the location of fault (optical, electrical or mechanical system).
•
Check if the disk is okay or faulty.
•
Check if external unit connected to the CR200 is faulty.
2. Remembering the operation flow chart
Example of fault : The CR200 does not play.
•
If the initial operation is completed.
•
If the pickup is at initial position.
•
If the laser diode is lighting.
•
If the LD ON signal is output.
•
If the lens is making the sweep operation.
•
If the spindle is rotating.
•
If the spindle is locked.
•
If the FG signal is output.
•
If the proper laser power is output.
•
If the RF signal (eye pattern) is clear.
No.
A
B
C
D
E
Mechanism Mode
REC
TOC REC
OPC
TOC check
PMA, actual pause recording
8-4. Judging Method of Pickup
Item
If the slider operation is normal ?
Check if the laser diode is lit.
Check if the lens is moving up/down.
8-5. Typical Cause & Symptom
Cause
The laser diode is not lit.
The laser diode is deteriorated.
The lens is dirty.
The coil is cut or broken.
The actuator is bent.
Frequency
* * *
*
* *
* * * *
Checking Method
• Check the slider circuit and mechanism in the TEST mode.
• If not, check the LD ON signal.
• If the lens is dirty, clean it and check the RF level before and after cleaning.
• If not, check the actuator, FSC and TRK coil.
• Check if the actuator is bent by the contact with cleaning disc, etc.,
Symptom
• The unit does not focus-lock.
• The RF level is not normal. (Normal value : 1.2Vp-p at middle of test disk)
• The RF waveform is dirty.
• The FSCG or TRKG is small.
• TRK : The unit cannot close the TRK servo.
• FSC : The unit cannot move the lens up/down.
• The TRK error level is small.
• The unit cannot search the designated position.
90
Page 91
8-6. Typical Faults on CD-R
1. Signal skipping or interruption
•
There are scratches, dusts and / or fingerprints on the disc.
•
The pickup is faulty.
•
Misalignment (Screw, etc.).
2. Signal skipping or interruption occurs when the disc is recorded and then played back on the same CD-R unit.
•
The recording power is too low.
•
The pickup is faulty.
•
Some of the section on the disc where dusts were attached could not be properly recorded.
3. SEARCH operation cannot be executed.
•
AC voltage is too low (-15% or more).
•
The gear in the servo mechanism is faulty (scratches, etc.).
•
Misalignment (Screw, etc.).
•
The pickup is faulty.
CR200
4. The unit cannot be put into REC-PAUSE mode.
••The recording power is too low.
The pickup is faulty.
5. The tray cannot be open.
•
There are scratches or dusts on the FG detection photo reflector pattern attached to the bottom side of disc table.