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Service Manual
Model
CR200
Compact Disc Recorder
DANGER - LASER RADIATION WHEN OPEN. AVOID DIRECT EXPOSURE TO BEAM.
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.
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 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.
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.
"WARNING"
"TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT EXPOSE THIS APPLIANCE TO RAIN OR MOISTURE."
SAFETY INSTRUCTIONS
1. 2. 3. 4. 5. Read instructions - All the safety and operating instructions should be read before the appliance is operated. Retain instructions - The safety and operating instructions should be retained for future reference. Heed warnings - All warnings on the appliance and in the operating instructions should be adhered to. Follow instructions - All operating and use instructions should be followed. Water and Moisture - The appliance should not be used 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 with a cart or stand that is recommended by the manufacturer. 9. Heat - The appliance should be situated away from heat sources such as radiators, heat registers, stoves, or other appliances (including amplifiers) that produce heat. Power Sources - The appliance should be connected to a power supply only of the type described in the operating instructions or as marked on the appliance. Grounding or Polarization - The precautions that should be taken so that the grounding or polarization means of an appliance is not defeated. Power Cord Protection - Power supply cords should be 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 recommended by the manufacturer. Nonuse Periods - The power cord of the appliance should be unplugged from the outlet when left unused for a long period of time. Object and Liquid Entry - Care should be taken so that objects do not fall and liquids are not spilled into the enclosure through openings. Damage requiring Service - The appliance should be serviced by qualified service personnel when: A. The power supply cord or the plug has been damaged; or B. Objects have fallen, or liquid has been spilled into the appliance; or C. The appliance has been exposed to rain; or D. The appliance does not appear to operate normally or exhibits a marked changed in performance; or E. The appliance has been dropped, or the enclosure damaged. Servicing - The user should not attempt to service the appliance beyond that described in the operating instructions. All other servicing should be referred to qualified service personnel.
10.
11.
12.
6.
13. 14.
15.
7.
8.
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 mounted to a wall or ceiling only as recommended by the manufacturer. Ventilation - The appliance should be situated so that its 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.
16.
17.
CR200
TABLE OF CONTENTS 1. CD-R THEORY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2. SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 3. CONTROLS, INDICATORS & CONNECTORS . . . . . . . . . . . . . . . . . 10 4. ADJUSTING PROCEDURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 5. ADDITIONAL INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . 39 6. EXPLODED VIEW, PCB ASSEMBLY & PARTS LIST . . . . . . . . 65 7. CIRCUIT & BLOCK DIAGRAMS. . . . . . . . . . . . . . . . . . . . . . . . . 77 8. TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
NOTES * 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 Remote control unit Model 8317 Audio cable (L : 1.2m) Power cable : 8288407000 (for export model) : 8270829000 : 8276912000 : 8276910000 (for USA model) : 8276911000 (for EUR model)
* Following is the packing material for the Model CR200. Carton, inner, CR200 : 8228718000 Carton, outer, CR200 : 8228897000 Packing, L, CR200 : 8228443000 Packing, R, CR200 : 8228444000
CAUTION ! 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
CR200
1. CD-R THEORY
120 max 118
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. · 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
44.7 min 33 min 26 15
Center hole
Clamping area
Information area Pregroove area with address (ATIP)
Layout of unrecorded CD-R disc
max 118 max 116 50 46 44.7 MUSIC PCA PMA temporary Table Of Contents (TOC) recorded part
Recordable User Area + Lead-out Area Lead-in Area
Program Area
Layout of partially recorded CD-R disc
max 118 max 116 50 46 MUSIC recorded part
Lead-in Area final Table of Contents (TOC)
Program Area Lead-out Area
Layout of recorded CD-R disc
max 118 max 116 50 46 MUSIC recorded part
TOC
Layout of conventional CD disc
Lead-out Area
Fig. 1 Cross Section of CD-R & CD Disc
4
CR200
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)
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.
PCA Test Area Count Area PMA Lead In Area
Partition
100 98
4 3 2 1
98
5
3
1
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
CR200
1-4. CD-R Disc Structure and Bubbling Process
654321098765432121098765432109876543210987654321 654321098765432121098765432109876543210987654321 654321098765432121098765432109876543210987654321 654321098765432121098765432109876543210987654321 654321098765432121098765432109876543210987654321
The materials of CD-R disc consists of label, protective layer, reflective layer, organic dye layer and transparent substrate.
Label UV protective layer Refective layer Organic dye layer
Transparent 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.
Organic dye becomes black and pit is created.
· Playback Principle NO PITS
ON PITS
A low power laser beam is shot and high reflectance is obtained.
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
CR200
2. SPECIFICATIONS
FUNCTIONS
Sampling rate converter 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 Previous Fader in / fader out Disk remaining time display Sampling monitor Skip play Track skip on / off One song / all songs program repeat Program play Manual search Track search Direct search Program setting / clear Input sensitivity switch Infra-red remote controller on / off switch Digital out on / off switch Copy bit setting switch Fs : 48 kHz / 32 kHz 44.1 kHz
End section of previous track can be reproduced during REC PAUSE mode. Can be controlled only by infra-red remote controller
Can be controlled only by main unit key Can be controlled only by infra-red remote controller
Can be controlled only by infra-red remote controller Can be controlled only by infra-red remote controller SW 1 (+4 dBu / -8 dBu, rear panel) SW 2 (rear panel) SW 2 (rear panel) SW 2 (No restriction / One time only / Prohibited, rear panel)
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
CR200
GENERAL Model Applicable discs Number of channels Power supply Power consumption Weight (without package) Maximum dimensions
Compact disc recorder CDs and CD-Rs 2 channels (stereo) AC 120 V, 60 Hz AC 220 ~ 230 V, 50 / 60 Hz 21 W 6.2 kg / 13.7 lbs 482 (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 characteristics S/N Dynamic range Total harmonic distortion Channel separation De-emphasis deviation Level difference between channels Output voltage Monitoring (analog RCA pin input) Frequency characteristics S/N Dynamic range Total harmonic distortion Maximum input level Minimum input level Record & Playback (analog RCA pin input) Frequency characteristics S/N Dynamic range Total harmonic distortion Monitoring (Digital coaxial input) Frequency characteristics S/N Dynamic range Total harmonic distortion Maximum input level Minimum input level Record & Playback (Digital coaxial input) Frequency characteristics S/N Dynamic range Total harmonic distortion
4 Hz ~ 20 kHz ± 1.0 dB 83 dB or more (EIAJ) 83 dB or more (EIAJ) 0.01 % or less (EIAJ) 90 dB or more (EIAJ) 0 ± 1.5 dB or less (EIAJ) 1.0 dB or less (EIAJ) 2.4 V ± 0.3 V rms 4 Hz ~ 20 kHz ± 1.0 dB 83 dB or more (EIAJ) 83 dB or more (EIAJ) 0.01 % or less (EIAJ) 3.2 V rms or more 0.4 V rms or less 4 Hz ~ 20 kHz ± 1.0 dB 83 dB or more (EIAJ) 83 dB or more (EIAJ) 0.01 % or less (EIAJ) 4 Hz ~ 20 kHz ± 1.0 dB 95 dB or more (EIAJ) 90 dB or more (EIAJ) 0.01 % or less (EIAJ) 0.6 V rms or more 0.2 V rms or less 4 Hz ~ 20 kHz ± 1.0 dB 90 dB (analog) / 105 dB (digital) 90 dB (analog) / 95 dB (digital) 0.01 % (analog) / 0.003 % (digital)
8
CR200
INPUT / OUTPUT JACKS Analog Input XLR-3-31 type (x 2) Standard input level Input impedance RCA type (x 2) Standard input level Input impedance Analog Output (x 2) RCA type Standard output level Load impedance Digital Input XLR-3-31 type RCA type Optical type Digital Output RCA type Optical type Parallel remote
+4 dBu / -10 dBV (switchable) 10 k½ -10 dBV 27 k½ or more
-10 dBV 10 k½ IEC958 Part 2 (AES/EBU) IEC958 Part 3 (S/P DIF) IEC958 Part 3 (S/P DIF) IEC958 Part 3 (S/P DIF) IEC958 Part 3 (S/P DIF) DIN 8-pin connector (Outer shell is grounded.) Pin 1 : PAUSE Pin 2 : Pin 3 : PLAY Pin 4 : NC Pin 5 : Manual track write Pin 6 : REC Pin 7 : Pin 8 : STOP
9
CR200
3. CONTROLS, INDICATORS & CONNECTORS
25
24
23
22
21
20 19
18 17
16
CR200 COMPACT DISC RECORDER
TRACK MIN SEC
REC BALANCE
REC LEVEL RECORD REC MUTE
15
SKIP SET CLEAR SKIP PLAY ON/OFF
TRACK NO.
COPY BIT
L
R
MIN
MAX PHONES LEVEL
14 13
1
POWER
(MANUAL)
AUTO/MANUAL WRITE TIME
MIN
MAX
PHONES
INPUT SELECTOR DIGITAL SYNCHRO
FINALIZE
2
3
4
5
6
7
8
9
10
11
12
< Front Panel Section >
1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. Power indicator Power switch [POWER] Input selector button [INPUT SELECTOR] Digital synchro button [DIGITAL SYNCHRO] Finalize button [FINALIZE] Time button [TIME] Disc tray Stop button [ ] Open/close button [ ] Pause button [ ] Play button [ ] Headphone jack [PHONES] Headphone level control [PHONES LEVEL] 14. 15. 16. 17. 18. 19. 20. 21. 22. 23. 24. 25. Skip play on/off switch [SKIP PLAY ON/OFF] Record muting button [REC MUTE] Record indicator Record button [RECORD] Track skip buttons [SKIP SET, CLEAR] Record level control [REC LEVEL] Track search buttons [ ][ ] Record balance control [REC BALANCE] Display panel Remote control sensor Copy bit indicator [COPY BIT] Track no. write button [TRACK NO. AUTO/MANUAL, WRITE]
10
CR200
26
27
28
29
30
31
IN
OUT
IN
OUT
R
L
R
L
AC IN
OPTICAL LINE IN
SW 1
COAXIAL IEC 958 DIGITAL IN/OUT
LINE OUT
R
PUSH HEAR
L
PUSH HEAR PUSH HEAR
1 2 3
BALANCE IN
1 2 3 4
AES/EBU DIGITAL IN
ON
SIGNAL GND
OFF ON DIGITAL OUT
SW 2
PARALLEL REMOTE
36
37
35
34
33
32
< Rear Panel Section >
26. 27. 28. 29. 30. 31. Analog line input connectors [LINE IN L, R] Digital input/output connectors [OPTICAL IN, OUT] Digital input/output connectors [COAXIAL IN, OUT] Analog line output connectors [LINE OUT] GND terminal [SIGNAL GND] AC inlet [AC IN] 32. 33. 34. 35. 36. 37. Parallel remote connector [PARALLEL REMOTE] Digital input connector [AES/EBU DIGITAL IN] Dip switch [SW 2] Digital out on/off switch [DIGITAL OUT OFF/ON] Analog balanced input connectors [BALANCE IN] Input select switch [SW 1]
< Remote Controller Section >
38. Fader button [FADER] 39. Repeat button [REPEAT] 40. Manual search buttons [ ][ ] Track search buttons [ ][ ] Stop button [ ] Pause button [ ] Play button [ ] 41. Numeric buttons [1 to 10, >10] 42. Program button [PGM] 43. Program check button [CHECK] 44. Program clear button [CLEAR] 45. Time button [TIME] 46. Record muting button [ ] 47. Manual track no. write button [TRACK NO. WRITE] 48. Record button [ REC]
MODEL 8317
REC
TRACK NO. WRITE
48 47 46
FADER
38
REPEAT
39 40
1 4 2 5 8 10 3 6 9
TIME
41
7 10
45
PGM CHECK CLEAR
42
44 43
11
CR200
4. ADJUSTING PROCEDURES
4-1. ADJUSTING PROCEDURES
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. 1 2 3 4 5 6 7 8 Item Playback power adjustment Coarse focus offset adjustment Coarse skew adjustment Coarse grating adjustment DPP (tracking offset) adjustment Fine focus offset adjustment Fine skew adjustment Grating readjustment Test Point CN104 Pin-7 (PWAJT) CN204 Pin-1 (RF) CN204 Pin-1 (RF) CN104 Pin-3 (TE) CN104 Pin-3 (TE) CN204 Pin-1 (RF) CN204 Pin-1 (RF) CN104 Pin-3 (TE) Pot VR103 (PB. PW) VR105 (FE. OFS) Radial adjustment screw Tangential adjusting screw Grating adjustment screw VR112 (TE. OFS) VR105 (FE. OFS) Radial adjustment screw Tangential adjusting screw Grating adjustment screw
12
CR200 Adjustment 2
No. 1 2 3 4 5 6 7 8 9 10 11 Item CD-R VCO control voltage adjustment Multi pulse time adjustment EFM rising edge time adjustment 3T rising edge time adjustment WBL + offset adjustment Coarse WBL offset adjustment RF offset adjustment Playback power readjustment Coarse focus offset adjustment Main and sub mix ratio adjustment Tracking amp. gain adjustment Test Point CN331 Pin-1 (VCOIN) CN3506 Pin-6 (MPLS) CN3506 Pin-5 (EFMIN) CN3506 Pin-4 (SEFM) CN3506 Pin-3 (3TIN) CN3506 Pin-2 (3TOUT) CN104 Pin-6 (RWBL) CN104 Pin-5 (WBL) CN204 Pin-1 (RF) CN104 Pin-7 (PWAJT) CN204 Pin-1 (RF) CN104 Pin-1 (STE) CN104 Pin-2 (MSTE) CN104 Pin-3 (TE) Pot VR301 (VCO CON) VR3501 (MPLS DLY) VR3502 (EFM DLY) VR3503 (3T DLY) VR107 (WBL+. OFS) VR108 (WBL. OFS) VR121 (RF. OFS) VR103 (PB. PW) VR105 (FE. OFS) VR110 (MS. MIX) VR111 (TE. GAIN)
SERVO UCOM BOARD ASSY STRATEGY BOARD ASSY
CN3506 1. DGND 2. 3T OUT 3. 3T IN 4. SEFM 5. EFM IN 6. MPLS
1
3
CN5021 1. ACT ERR 2. ACT IN 3. V+5A
1
6
CN3506 1 2
CN5021 CN331 TP30
CN331 1. VCOIN 2. GND
VR202 TE. GAIN
VR3503 VR301 3T. DLY VCO CON
Shorten the two lands to put the CR200 into the TEST MODE.
TEST MODE
VR201 FCS. GAIN
VR3502 EFM DLY VR3501 MPLS DLY CN204 1. RF 2. TRKER 3. TRKIN 4. A GND 5. FCSIN 6. FCSER
Fig. 6
13
321 321 321 321 321
321 321 321 321 321
6
1
Fig. 7
CN204 ADJUST TP
CR200
Adjustment 2 (continued)
No. 12 13 14 15 16 17 18 19 20 21 22 Item Tracking offset adjustment ACT offset adfjustment ACT gain adjustment Fine focus offset adjustment WBL balance adjustment Fine WBL offset adjustment WBL focus offset adjustment Recording power adjustment HF amp. gain adjustmnet Focus servo loop gain adjustment Tracking servo loop gain adjustment Test Point CN104 Pin-3 (TE) CN5021 Pin-1 (ACT ERR) CN5021 Pin-1 (ACT ERR) CN204 Pin-1 (RF) CN104 Pin-5 (WBL) CN104 Pin-5 (WBL) CN104 Pin-5 (WBL) CN104 Pin-7 (PWAJT) CN104 Pin-8 (HF) CN204 Pin-5 (FCSIN) CN204 Pin-6 (FCSER) CN204 Pin-2 (TRKER) CN204 Pin-3 (TRKIN) Pot VR112 (TE. OFS) VR1 (ACT. OFS) VR10 (ACT. GAIN) VR105 (FE. OFS) VR106 (WBL. BALANCE) VR108 (WBL. OFS) VR115 (WFE. OFS) VR104 (REC. PW) VR119 (HF. GAIN) VR201 (FCS. GAIN) VR202 (TE. GAIN)
VR10 ACT. GAIN VR1 ACT. OFS
VR103 PB. PW
HEAD BOARD ASSY
VR112 TE. OFS
VR111 TE. GAIN
VR119 HF GAIN VR121 RF. OFS VR105 FE. OFS VR115 WFE. OFS VR104 REC. PW VR108 WBL. OFS VR107 WBL+. OFS VR106 WBL BALANCE
Fig. 8
14
CN104
VR110 MS. MIX
1. STE 2. MSTE 3. TE 4. A GND 5. WBL 6. RWBL 7. PWAJT 8. HF
CR200 Notes
(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.
[ 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 Mode
DIGITAL Playback laser diode ON SYNCHRO
Explanation
Lights up the laser diode by playback power.
FINALIZE
PLAY
PAUSE
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 disc by hand, you can hear the sound of focus servo. If you Focus servo closes 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 Spindle servo ON 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. Tracking servo close/open 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
CR200
Code Key Name Function in Test Mode Explanation
·
·
Moves the pickup position toward the inner diameter of the disc. When this key is pressed with the tracking servo in a closed loop, the tracking servo automatically goes into an MANUAL/ Carriage reverse open loop. TRACK (inwards) Since the motor does not automatically stop at the SEARCH REV 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 MANUAL/ Carriage forward open loop. TRACK (outwards) Since the motor does not automatically stop at the SEARCH FWD mechanical end point in test mode, be careful with this operation. Initializes and the disc rotation stops. STOP The pickup and disc remain where they are when this key is Stop 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, OPEN/CLOSE Disc tray open/close 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 RECORD Maximum recording power normal EFM by pressing REC and REC MUTE keys in order. * The laser diode may be damaged if adjustments are made Laser diode ON before pressing these keys. REC MUTE Switches the focus offset state. AUTO/ Focus offset servo COPY BIT LED Lights UP: C/N in the best condition MANUAL Lights OFF: Jitter in the best condition Switches the ON/OFF of the optical axis servo. Optical axis servo WRITE (MANUAL) LED Lights UP: Optical axis servo ON switching Light OFF: Optical axis servo OFF When using the CD-R disc, search to the lead (0 min. Search to the lead of disc. TIME 0 sec.) of disc. (It works only CD-R use.) (It doesn't work in CD disc use.)
[ 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 Lights up the laser diode and closes the focus servo. Starts the spindle motor and closes the spindle servo. Closes the tracking servo.
Wait at least 2 ~ 3 seconds between each of these operations.
16
CR200
4.2 Adjustment 1
4.2.1 Playback Power Adjustment
DANGER - LASER RADIATION WHEN OPEN. AVOID DIRECT EXPOSURE TO BEAM. · Objective To optimize the playback power of the laser diode. · Symptom when out of adjustment Does not start playing, track search is impossible, tracks are skipped. · Measurement instrument connections Multimeter to CN104, Pin-7 (PWAJT) (HEAD BOARD assy) GND probe can be connected to CN104, Pin-4 (AGND). · Disc None needed · Player state Test mode, Playback laser diode ON · Adjustment location VR103 (PB. PW) (HEAD BOARD assy) CAUTION: (a) Perform this adjustment more than 5 minutes after starting up the test mode. (b) This adjustment cannot be performed accurately if disc is inserted. Be sure to remove disc first before adjustments. (c) If the specified voltage is not obtained by turning VR103, the pickup assy might be defective. Also be careful not to get the pickup lens dirty. [ Procedures ] · When adjusting with the multimeter. (1) Lights up the playback laser diode using the DIGITAL SYNCHRO key. (2) Adjust the voltage value of Pin-7 (PWAJT) of CN104 (TP1) to the voltage value (PB PW voltage ± 5mV) displayed on the pickup flexible cable using VR103 (PB PW).
· Reference: When adjusting with the optical power meter.
(1) Move the pickup to the outer edge of the disc with the MANUAL / TRACK SEARCH FWD key. (2) Lights up the playback laser diode by the DIGITAL SYNCHRO key. (3) Shine the light discharged from the objective lens in the pickup on the light power meter sensor. Adjust VR103 (PB. PW) so that the playback laser diode output is an average 0.65 mW ± 0.05mW. (Wavelength 790nm, Average mode)
P : Playback power R : Recording power
Fig. 9
* Recording on the disc is not possible in test mode.
17
CR200 4.2.2 Coarse Focus Offset Adjustment
To coarse adjust the DC offset voltage of the focus servo circuit to perform the tracking and slider adjustments correctly. · Symptom when out of adjustment The unit does not focus in, sound is cracking and the RF signal is dirty. · Measurement instrument connections Osciloscope to CN204, Pin-1 (RF) (SERVO UCOM BOARDassy) GND probe can be connected to CN204, Pin-4 (AGND). [ Settings ]: 20 mV/div., 2 mS/div., DC mode · Disc TCD-785 · Player state Test mode, focus and spindle servos: closed, tracking servo: open · Adjustment location VR105 (FE. OFS) (HEAD BOARD assy) · Objective
[ Procedures ] (1) Press the FINALIZE key and the PLAY key in the order to close the focus servo and then the spindle servo. (2) Adjust VR105 (FE. OFS) so that the amplitude of waveform at CN204 (TP201), Pin-1 (RF) is maximum. 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
Optimum adjustment (Waveform amplitude is at maximum.)
Fig. 10
18
CR200 4.2.3 Coarse Skew Adjustment
To coarse adjust the angle of pickup to the disc for performing the grating and DPP (tracking offset) adjustments correctly. · Symptom when out of adjustment Sound 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 · Disc TCD-785 · Player state Test mode, focus and spindle servos: closed, tracking servo: open · Adjustment location Radial adjustment screw and tangential adjustment screw · Objective
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 ] (1) Move the pickup to the position where the radial/tangential adjustment screws will be seen with the MANUAL / TRACK SEARCH FWD or REV keys so that the radial/tangential adjustment screws can be adjusted. (2) Press the FINALIZE key and the PLAY key in the order to close the focus servo and then the spindle servo. (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. NOTE: Radial direction and tangential direction mean the direction relative to the disc shown in Fig. 11.
Radial adjustment screw
Tangential direction Hexagonal screwdriver
Radial direction
Tangential adjustment screw
Disc
Fig. 2
FR O NT
PA NE L
19
Fig. 11
CR200 4.2.4 Coarse Grating Adjustment
· Objective To align the tracking error generation laser beam spots to the optimum angle on the track. · Symptom when out of adjustment Does 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 · Disc TCD-785 · Player state Test mode, focus and spindle servos: closed, tracking servo: open. · Adjustment location Grating adjustment screw in the slit [ Procedures ] (1) Move the pickup to the position where the grating adjustment slit will be seen with the MANUAL / TRACK SEARCH FWD or REV keys so that the grating adjustment can be adjusted. (2) Press the FINALIZE key and the PLAY key in the order to close the focus servo and then spindle servo. (3) Insert a screwdriver into the grating adjustment slit and adjust the grating to find the null point. For more details, see next page. (4) If you slowly turn the screwdriver clockwise from the null point, the amplitude of the wave gradually increases. Then, if 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. (5) Return the pickup to more or less midway across disc with the MANUAL / TRACK SEARCH key. Then, press the 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
CN104 (TP1) Pin 3 (TE)
LPF 15k 0.001 µF
(10 : 1)
Grating adjustment screw
Pin 4 (AGND)
HEAD BOARD ASSY
Fig. 3
Fig. 12
20
CR200
[ How to find the null point ] 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.
Turning the grating counterclockwise
Turning the grating clockwise
Null point waveform
Maximum 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. Null point Grating adjustment position Waveform of CN104 (TP1), Pin 3 (TE)
Fig. 13 Fig. 4
4.2.5 DPP (Tracking Offset) Adjustment
· Objective To correct for the variation in the sensitivity of the tracking photodiode. · Symptom when out of adjustment The 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 · Disc TCD-785 · Player state Test mode, focus and spindle servos: closed, tracking servo: open. · Adjustment location VR112 (TE. OFS) (HEAD BOARD assy) [ Procedures ] (1) Move the pickup to the midway across the disc (R = 35mm) with the MANUAL / TRACK SEARCH FWD or REV keys. (2) Press the FINALIZE key and the PLAY key in the order to close the focus servo and then spindle servo. (3) Line up the bright line (ground) at the center of the oscilloscope screen and put the oscilloscope into DC mode. (4) Adjust VR112 (TE. OFS) so that the positive amplitude and negative amplitude of the tracking error signal at CN104, Pin-3 (TE) are the same (in other words, so that there is no DC component).
A=B A GND B B A GND A=B
When there is a DC component
When there is no DC component
Fig. 14
21
CR200 4.2.6 Fine Focus Offset Adjustment
· Objective To optimize the DC offset voltage of the focus servo circuit. · Symptom when out of adjustment The unit does not focus in, sound is caracking and the RF signal is dirty. · 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., 500 nS/div., AC mode · Disc TCD-785 · Player state Test mode, play · Adjustment location VR105 (FE. OFS) (HEAD BOARD assy)
[ Procedures ] (1) 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 VR105 (FE. OFS) so that the 3T waveform at CN204, Pin-1 (RF) is maximum.
Out of adjustment
Optimum adjustment
Fig. 15
22
CR200 4.2.7 Fine Skew Adjustment
To 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 adjustment Sound 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 · Disc TCD-785 · Player state Test mode, play · Adjustment location Pickup radial adjustment screw and tangential adjustment screw [ Procedures ] (1) Move the pickup to the position where the radial/tangential adjustment screws will be seen with the MANUAL / TRACK SEARCH FWD or REV keys so that the radial/tangential adjustment screws can be adjusted. (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) First, adjust the radial adjustment screw with the hexagonal screwdriver (1.27 mm) so that the eye pattern (the diamond shape at the center of the RF signal) can be seen the most clearly and the amplitude is at maximum.. (4) Next, adjust the tangential adjustment screw with the hexagonal screwdriver so that the eye pattern can be seen the most clearly. (Fig. 17). (5) Adjust in the order of the radial adjustment screw and the tangential screw again, so that the eye pattern can be seen the 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 (6) screw and the tangential adjustment screw with loc-tite. · Objective
Stabilize each screw with an adhesive.
Hexagonal screwdriver
Radial adjustment screw Tangential adjustment screw
(Front side)
(Rear side)
Fig. 16
23
CR200
Out of adjustment Optimum adjustment Out of adjustment
Optimum Out of Out of adjustment adjustment adjustment
Fig. 17
4.2.8 Grating Re-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
· Objective To optimize the CD-R VCO control voltage adjustment of VCO IC. · Symptom when out of adjustment The unit does not record or playback CD-R discs. · Measurement instrument connections Multimeter to CN331, Pin-1 (VCOIN) (STRATEGY BOARD assy) GND probe can be connected to CN331, Pin-2 (GND). · Disc None needed · Player state Test mode, stop · Adjustment location VR301 (VCOIN) (STRATEGY BOARD assy)
[ Procedures ] (1) Adjust VR301 (VCO CON) so that the voltage at Pin 1 (VCOIN) of CN331 (TP30) becomes 2.5 ± 0.1V.
24
CR200 4.3.2 Multi Pulse Time Adjustment
· Objective Pulse adjustment for recording (1) · Symptom when out of adjustment The unit does not playback CD-R discs which was recorded with this player . · Measurement instrument connections Oscilloscope to CN3506, Pin-6 (MPLS) (STRATEGY BOARD assy) GND probe can be connected to CN3506, Pin-1 (DGND). [ Settings ]: 1 V/div., 20 nS/div., DC mode · Disc None needed · Player state Test mode, stop · Adjustment location VR3501 (MPLS DLY) (STRATEGY BOARD assy) [ Procedures ] (1) Disconnect a connector CN3502 (white wires with green connector). (2) Adjust the time from rising edge to falling edge of Waveform with 2V level. (3) Adjust VR3501 (MPLS DLY) so that the DC voltage at CN3506 pin-6 (MPLS) becomes 70nS ± 3nS. (4) Press the STOP key. (5) Connect a connector CN3502.
2V
GND 70nS ±3nS
4.3.3 EFM Rising Edge Time Adjustment
· Objective Pulse adjustment for recording (2) · Symptom when out of adjustment The unit does not playback CD-R discs which was recorded with this player . · Measurement instrument connections Oscilloscope to CH1 : CN3506, Pin-5 (EFM IN) (STRATEGY BOARD assy) CH2 : CN3506, Pin-4 (SEFM) (STRATEGY BOARD assy) GND probe can be connected to CN3506, Pin-1 (DGND). [ Settings ] CH1 : 1 V/div. DC mode, 20 nS/div. CH2 : 1 V/div. DC mode · Disc None needed · Player state Test mode, recording power ON · Adjustment location VR3502 (EFM DLY) (STRATEGY BOARD assy) [ Procedures ] (1) (2) (3) (4) Disconnect a connector CN3502. Turn VR104 (REC. PW) fully counterclockwise to reduce the power to minimum. Press RECORD and REC MUTE keys in the order to lights up the laser diode. Adjust the time from rising edge of CN3506 pin 5 to rising edge of pin 4 of waveform at the 2V level. (5) Adjust VR3502 (EFM DLY) so that the delay becomes 80nS ± 3nS.
CH1 CH2 2V
GND 80nS ±3nS
25
CR200 4.3.4 3T Rising Edge Time Adjustment
· Objective Pulse adjustment for recording (3) · Symptom when out of adjustment The unit does not playback CD-R discs which was recorded with this player . · Measurement instrument connections Oscilloscope to CH1 : CN3506, Pin-3 (3T IN) (STRATEGY BOARD assy) CH2 : CN3506, Pin-2 (3T OUT) (STRATEGY BOARD assy) GND probe can be connected to CN3506, Pin-1 (DGND). [ Settings ] CH1 : 1 V/div., DC mode, 20 nS/div. CH2 : 1 V/div., DC mode · Disc None needed · Player state Test mode, recording power ON · Adjustment location VR3503 (3T DLY) (STRATEGY BOARD assy)
[ Procedures ] (1) Disconnect a connector CN3502. (2) Turn VR104 (REC. PW) fully counterclockwise to reduce the power at minimum. (3) Press the RECORD and the REC MUTE keys in the order to lights up the laser diode. (4) Adjust the time from rising edge of CN3506 pin-3 to rising edge of pin 2 of waveform with 2V level. (5) Adjust VR3503 (3T DLY) so that the delay becomes 42nS ± 3nS. (6) Connect a connector CN3502.
CH1 CH2 2V
GND 42nS ±3nS
4.3.5 WBL+ Offset Adjustment
· Objective To adjust the gain balance of the wobble signal. · Symptom when out of adjustment The unit does not record or playback CD-R discs. · Measurement instrument connections Oscilloscope to CN104, Pin-6 (RWBL) (HEAD BOARD assy) GND probe can be connected to CN104, Pin-4 (AGND). [ Settings ]: 1 mV/div., 5 mS/div., DC mode · Disc None needed · Player state Test mode, stop · Adjustment location VR107 (WBL+. OFS) (HEAD BOARD assy)
[ Procedures ] (1) Turn VR108 (WBL. OFS) to fully counterclockwise. (2) Adjust VR107 (WBL+. OFS) so that the DC voltage at CN104 (TP1), Pin-6 (RWBL) is Ð20mV ± 10mV.
26
CR200 4.3.6 Coarse WBL Offset Adjustment
· Objective To optimize the DC offset voltage of the wobble amp. · Symptom when out of adjustment The unit does not record or playback CD-R discs. · Measurement instrument connections Oscilloscope to CN104, Pin-5 (WBL) (HEAD BOARD assy) GND probe can be connected to CN104, Pin-4 (AGND). [ Settings ]: 1 mV/div., 5 mS/div., DC mode · Disc None needed · Player state Test mode, stop · Adjustment location VR108 (WBL. OFS) (HEAD BOARD assy) [ Procedures ] (1) Adjust VR108 (WBL. OFS) so that the DC voltage at Pin 5 (WBL) of CN104 (TP1) becomes 0 ± 10mV.
4.3.7 RF Offset Adjustment
· Objective To optimize the DC offset voltage of the RF amp. · Symptom when out of adjustment The unit does not playback.. · Measurement instrument connections Oscilloscope to CN204, Pin-1 (RF) (SERVO UCOM BOARD assy) GND probe can be connected to CN204, Pin-4 (AGND). [ Settings ]: 1 mV/div., 5 mS/div., DC mode · Disc None needed · Player state Test mode, stop · Adjustment location VR121 (RF. OFS) (HEAD BOARD assy) [ Procedures ] (1) Adjust VR121 (RF. OFS) so that the DC voltage at Pin 1 (RF) of CN204 (TP201) becomes 0 ± 10mV.
4.3.8 Playback Power Re-adjustment
[ Procedures ] (1) Adjust in the same manner as "4.2.1. Playback Power Adjustment " in Adjustment 1.
27
CR200 4.3.9 Coarse Focus Offset Adjustment
· Objective To optimize the DC offset voltage of the focus error amp. · Symptom when out of adjustment The unit does not focus in and the RF signal is dirty. · 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., 2 mS/div., DC mode · Disc TCD-785 · Player state Test mode, focus and spindle servos: closed, tracking servo: open · Adjustment location VR105 (FE. OFS) (HEAD BOARD assy) [ Procedures ] (1) Press the FINALIZE key and the PLAY key in the order to close the focus servo and then the spindle servo. (2) Adjust VR105 (FE. OFS) so that the amplitude of RF signal at CN204, Pin-1 (RF) is maximum.
Out of adjustment
Optimum adjustment
Fig. 18
4.3.10 Main and Sub Mix Ratio Adjustment
· Objective To mix the gain of the main signal output and sub signal output of the pickup. · Symptom when out of adjustment The unit does not playback. · Measurement instrument connections Oscilloscope to CH1: CN104, Pin-1 (STE) (HEAD BOARD assy) CH2: CN104, Pin-2 (MSTE) (HEAD BOARD assy) [These connections must be via low pass filters. ] GND probe can be connected to CN104, Pin-4 (AGND). [ Settings ] CH1 : 50 mV/div. AC mode 10 mS/div. ADD mode CH2 : 100 mV/diV. AC mode · Disc TCD-785 · Player state Test mode, focus and spindle servos: closed, tracking servo: open · Adjustment location VR110 (MS. MIX) (HEAD BOARD assy) [ Procedures ] (1) Press the FINALIZE key and the PLAY key in the order to close the focus servo and then the spindle servo. (2) Set the oscilloscope to ADD mode (waveform adding mode of CH1 and CH2) and observe the adding waveform of CH1 and CH2. (3) Adjust VR110 (MS. MIX) so that the amplitude of waveform becomes minimum.
28
CR200 4.3.11 Tracking Amp. Gain Adjustment
· Objective To correct the discrepancy in the tracking error level with the pickup. · Symptom when out of adjustment The unit does not playback, track search is impossible, tracks are skipped. · Measurement instrument connections Oscilloscope to CN104, Pin-3 (TE) (HEAD BOARD assy) [The 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 · Disc TCD-785 · Player state Test mode, focus and spindle servos: closed, tracking servo: open · Adjustment location VR111 (TE. GAIN) (HEAD BOARD assy) [ Procedures ] (1) Move the pickup to midway across the disc (R = 35mm) with the MANUAL / TRACK SEARCH FWD or REV keys. (2) Press the FINALIZE key and the PLAY key in the order to close the focus servo and then the spindle servo. (3) Line up the bright line (ground) at the center of the oscilloscope screen and put the oscilloscope into DC mode. (4) Adjust VR111 (TE. GAIN) so that the positive amplitude and negative amplitude of the tracking error signal at CN104 (TP1), Pin 3 (TE) is 1.0V ± 0.05V.
GND
1.0V ± 0.05V
4.3.12 Tracking Offset Adjustment
· Objective To correct for the variation in the sensitivity of the tracking photodiode. · Symptom when out of adjustment The 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 · Disc TCD-785 · Player state Test mode, focus and spindle servos: closed, tracking servo: open · Adjustment location VR112 (TE. OFS) (HEAD BOARD assy) [ Procedures ] (1) (2) (3) (4) Move the pickup to midway across the disc (R = 35mm) with the MANUAL / TRACK SEARCH FWD or REV keys. Press the FINALIZE key and the PLAY key in the order to close the focus servo and then the spindle servo. Line up the bright line (ground) at the center of the oscilloscope screen and put the oscilloscope into DC mode. Adjust VR112 (TE. OFS) so that the positive amplitude and negative amplitude of the tracking error signal at CN104, Pin-3 (TE) are the same (in other words, so that there is no DC component).
Note : If the great offset is observed, perform the adjustments in the section 4.3.11 and 4.3.12.
A=B A GND B B A GND A=B
When there is a DC component
When there is no DC component
29
CR200 4.3.13 ACT Offset Adjustment
· Objective To optimize the DC offset voltage of the actuator servo. · Symptom when out of adjustment The unit does not pause, track search is impossible, tracks are skipped. · Measurement instrument connections Oscilloscope to CN5021, Pin-1 (ACT ERR) (SERVO UCOM BOARD assy) [ Settings ]: 5 mV/div, 5 mS/div., DC mode · Disc TCD-785 · Player state Test mode, focus and spindle servos: closed, tracking servo: open · Adjustment location VR1 (ACT. OFS) (HEAD BOARD assy)
[ Procedures ] (1) Move the pickup to midway across the disc (R = 35mm) with the MANUAL / TRACK SEARCH FWD or REV keys. (2) Press the FINALIZE key and the PLAY key in the order to close the focus servo and then the spindle servo. (3) Adjust VR1 (ACT. OFS) so that the DC voltage at CN5021 (TP00), Pin 1 (ACT ERR) is 0 ± 20mV.
4.3.14 ACT Gain Adjustment
· Objective To optimize the actuator servo gain. · Symptom when out of adjustment The unit does not pause, track search is impossible, tracks are skipped. · Measurement instrument connections Oscilloscope to CN5021, Pin-1 (ACT ERR) (SERVO UCOM BOARD assy) [ Settings ]: 10 mV/div., 5 mS/div., DC mode · Disc TCD-785 · Player state Test mode, focus and spindle servos: closed, tracking servo: open · Adjustment location VR10 (ACT. GAIN) (HEAD BOARD assy)
[ Procedures ] (1) Move the pickup to midway across the disc (R = 35mm) with the MANUAL / TRACK SEARCH FWD or REV keys. (2) Press the FINALIZE key and the PLAY key in the order to close the focus servo and then the spindle servo. (3) Press the WRITE key to light up the WRITE KEY LED, and short-circuit the Pin-2 and Pin-3 of CN5021. Adjust VR10 (ACT. GAIN) so that the DC voltage at CN5021 (TP00), Pin 1 (ACT ERR) is Ð380 ± 20mV. Note : If the great offset is observed, perform the adjustments in the section 4.3.13 and 4.3.142.
30
CR200 4.3.15 Fine Focus Offset Adjustment
· Objective To optimize the DC offset voltage of the focus servo circuit. · Symptom when out of adjustment The unit does not focus in, sound is cracking and the RF signal is dirty. · 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., 500 nS/div., AC mode · Disc STD-R03 · Player state Test mode, play · Adjustment location VR105 (FE. OFS) (HEAD BOARD assy) [ Procedures ] (1) 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 VR105 (FE. OFS) so that the 3T waveform at CN204, Pin-1 (RF) is maximum. Note : Adjust after confirming that the WRITE KEY LED is OFF.
Out of adjustment
Optimum adjustment
Fig. 19
31
CR200 4.3.16 WBL Balance Adjustment
· Objective To adjust the gain balance of the wobble signal. · Symptom when out of adjustment The 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+3.9k).] GND probe can be connected to CN104, Pin-4 (AGND). [ Settings ]: 5 mV/div., 20 µS/div., DC mode · Disc STD-R03 · Player state Test mode, play · Adjustment location VR106 (WBL. BALANCE) (HEAD BOARD assy)
[ Procedures ] (1) 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 VR106 (WBL. BALANCE) so that the amplitude of waveform at CN104 (TP1), Pin 5 (WBL) is minimum.
Out of adjustment
Optimum adjustment
Fig. 20
32
CR200 4.3.17 Fine WBL Offset Adjustment
· Objective To adjust the gain balance of the wobble signal. · Symptom when out of adjustment The 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+3.9k).] GND probe can be connected to CN104, Pin-4 (AGND). [ Settings ]: 5 mV/div., 20 µS/div., DC mode · Disc STD-R03 · Player state Test mode, play · Adjustment location VR108 (WBL. OFS) (HEAD BOARD assy)
[ Procedures ] (1) 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.
Out of adjustment
Optimum adjustment
Fig. 21
33
CR200 4.3.18 WBL Focus Offset Adjustment
· Objective To adjust the gain balance of the wobble signal. · Symptom when out of adjustment The 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 · Disc STD-R03 · Player state Test mode, play · Adjustment location VR115 (WFE. OFS) (HEAD BOARD assy)
[ Procedures ] (1) 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.
Out of adjustment
Optimum adjustment
Fig. 22
34
CR200 4.3.19 Recording Power Adjustment
DANGER - LASER RADIATION WHEN OPEN. AVOID DIRECT EXPOSURE TO BEAM. To optimize the recording power of the laser diode. The 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). · Disc None needed · Player state Test mode, maximum recording power ON · Adjustment location VR104 (REC. PW) (HEAD BOARD assy) CAUTION: (a) Perform this adjustment more than 5 minutes after starting up the test mode. (b) Power more than ten times greater than playback power is released during these adjustment. Never look directly at the objective lens. (c) This adjustment cannot be performed accurately if disc is inserted. Be sure to remove disc first before adjustments. (d) The laser diode may be damaged if the recording power is greater than the specified value. Always perform the step 1 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). [ 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
· Objective · Symptom when out of adjustment
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
CR200
[ Procedures ] (1) Fully turn VR104 (REC. PW) counterclockwise to reduce the power to the minimum. (2) Move the pickup to the outer edge of the disc with the MANUAL / TRACK SEARCH FWD key. (3) Press RECORD and REC MUTE keys in that order to lights up the laser diode. (4) Shine the light discharged from the objective lens in the pickup on the light power meter sensor and adjust VR104 (REC. 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
· Objective To correct the discrepancy in the HF level with the pickup. · Symptom when out of adjustment The unit does not record, track search is impossible. · Measurement instrument connections Oscilloscope to CN104, Pin 8 (HF) (HEAD BOARD assy) GND probe can be connected to CN104, Pin-4 (AGND). [ Settings ]: 50 mV/div., 500 nS/div., DC mode · Disc TCD-785 · Player state Test mode, play · Adjustment location VR119 (HF. GAIN) (HEAD BOARD assy) [ Procedures ] (1) 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) Line up bright line (ground) at the center of the oscilloscope screen and put the oscilloscope into DC mode. (4) Adjust VR119 (HF. GAIN) so that the amplitude of waveform at CN104 , Pin-8 (HF) is 2.0V ± 0.1V. NOTE : Adjust after checking that the COPY BIT LED is OFF.
2.0V ± 0.1V
Fig. 23
36
CR200 4.3.21 Focus Servo Loop Gain Adjustment
· Objective To optimize the focus servo loop gain. · Symptom when out of adjustment Playback does not start or focus acutuator noisy. · Measurement instrument connections Oscilliscope CH1 to CN204, Pin-5 (FCSIN) via 100k½ resistor Oscilloscope CH2 to CN204, Pin-6 (FCSER) (SERVO UCOM BOARD assy) See Fig.23 below. [ Settings ] CH1 : 0.1 V/div., X-Y mode CH2 : 10 mV/div. GND probe can be connected to CN204, Pin-4 (AGND). · Disc TCD-785 · Player state Test mode, play · Adjustment location VR201 (FCS. GAIN) (SERVO UCOM BOARD assy)
[ Procedures ] (1) Set the AF generator output to 1.4kHz and 1Vp-p. (2) Move the pickup to midway across the disc (R = 35mm) with the MANUAL / TRACK SEARCH FWD or REV keys. (3) 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. (4) Adjust VR201 (FCS. GAIN) so that the lissajous waveform is symmetrical about X axis and the Y axis.
CN204 (TP201) Pin 5 (FCSIN) Pin 4 (AGND) Pin 6 (FCSER) (10 : 1)
(10 : 1) 100k X Y
1.4kHz 1Vp-p
Fig. 24 Fig. 6
Higher gain
Optimum gain
Lower gain
37
CR200 4.3.22 Tracking Servo Loop Gain Adjustment
· Objective To optimize the tracking servo loop gain. · Symptom when out of adjustment The unit does not start, during searches the acutuator is noisy, or tracks are skipped. · Measurement instrument connections Oscilliscope CH1 to CN204, Pin-3 (TRKIN) via 100k½ resistor Oscilloscope CH2 to CN204, Pin-2 (TRKER) (SERVO UCOM BOARD assy) See Fig.24 below. [ Settings ] CH1 : 0.1 V/div., X-Y mode CH2 : 10 mV/div. GND probe can be connected to CN204, Pin-4 (AGND). · Disc TCD-785 · Player state Test mode, play · Adjustment location VR202 (TE. GAIN) (SERVO UCOM BOARD assy) [ Procedures ] (1) Set the AF generator output to 1.2kHz and 2Vp-p. (2) Move the pickup to midway across the disc (R = 35mm) with the MANUAL / TRACK SEARCH FWD or REV keys. (3) 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. (4) Adjust VR202 (TE. GAIN) so that the lissajous waveform is symmetrical about X axis and the Y axis.
CN204 (TP201) Pin 3 (TRKIN) Pin 4 (AGND) Pin 2 (TRKER)
(10:1) 100k X Y
1.2kHz (10:1) 2Vp-p
39k 0.001µF Low pass filter Fig. 7
Fig. 25
Higher gain
Optimum gain
Lower gain
38
CR200
5. ADDITIONAL INFORMATION
5-1. WAVEFORM AND VOLTAGES
HEAD BOARD ASSY
· Measuring condition: DC input unless otherwise noted.
2 3
CN111 pin 1 (EFM) CN105 pin 4 (XSAMP) Test mode During maximum recording power laser diode ON 2V/div 0.2µS/div
7 2 GND 10 3 GND 6 GND
7 6
IC202 pin 7 (TRKCON) 2V/div 0.5mS/div IC202 pin 1 (TD) 0.2V/div 0.5mS/div During PLAY
11 10
CN106 pin 5 (SPDL) 1V/div 2mS/div IC203 pin 4 (SPD MT) 2V/div 2mS/div During PLAY
14 15
TP1 pin 5 (WBL) CN105 pin 11 (WBL) During CD-R PLAY 100mV/div 20µS/div
GND
11 GND GND
14
GND
15
GND
5 4
IC202 pin 6 (FCS ON) IC202 pin 3 (FD) During PLAY 5V/div 1mS/div
9 8
IC203 pin 1 (SLDCON) IC203 pin 3 (SLD MT) During PLAY 0.5V/div 0.2mS/div
12 13
IC101 pin 47 (MTE) 200mV/div CN105 pin 3 (M+STE) 500mV/div Test mode CD FCS CLOSE SPDL TRK OPEN
Q101 (2SC2412K) [V]
Pin MODE No. STOP PLAY E 0.6 0.6 C B 1.2 1.2 REC 0.8 1.4
9 5 4 GND GND 8
GND GND 12
GND
Q102 (2SB1189) [V]
Pin MODE No. STOP PLAY E 5.0 5.0 C 1.5 1.5 B 4.3 3.8 REC 4.5 1.8 3.8
13
GND
IC101 (PA4022A) [V]
Pin MODE No. STOP PLAY 1 0.01 2 0.02 -0.12 3 0 -0.16 4 -4.9 -4.9 5 0 0 6 0 0 7 0 0 8 0 0 9 0 0 10 0 0 11 0 0 12 0 0 13 0 0 14 0 0 15 0 0 16 0 0 17 0 0 18 0 0 19 0 0 20 0 0 21 0 0 22 0 0 23 1.4 1.4 24 1.4 1.4 25 0 0 26 0 0.2 27 0 0 28 0 0 29 5.0 5.0 30 4.2 1.2 31 -3.4 -1.7 32 0 0 33 -1.0 0 34 4.3 3.6 RE C -0.1 -0.4 0 -4.9 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1.4 1.4 0.9 0.2 1.2 0 5.0 1.2 -1.7 0 0 3.6 Pin MODE No. STOP PLAY 35 0.6 0.6 36 0.6 0.6 37 1.2 1.2 38 0.1 0.1 39 5.0 0 40 0 0 41 0 0 42 0 0 43 0 0 44 0 -0.1 45 -4.9 -4.9 46 0 -0.1 47 0 0 48 0 0 49 0 0 50 0 0 51 0 0 52 0 -0.1 53 0 -0.1 54 0 0.2 55 0 0 56 0 0 57 0.1 0.1 58 -4.0 -4.0 59 -2.9 -2.7 60 0 0 61 0 0 62 0 0 63 5.0 5.0 64 -0.1 0.3 65 0 -0.1 66 -0.3 1.4 67 0 0 68 -0.1 0 REC 0.8 0.8 1.5 3.1 0 -0.1 0 0 0.1 -0.1 -4.9 -0.1 0 0 0 0 0 0 -0.1 0.2 0 0 0.1 -4.0 -2.7 0 0 0 5.0 0.3 0 1.2 0 0
IC102 (BA4560F) [V]
Pin MODE No. STOP PLAY 1 0 0.2 2 1.4 1.4 3 4.4 1.4 4 -5.0 -5.0 5 0 0 6 0 0 7 8 0 5 0 5 REC 1.5 1.5 1.4 -5.0 0 0 0.1 to 0.6 5
IC202 (LA6517) [V]
Pin MODE No. STOP PLAY 1 0 0 2 9.4 3 -0.4 -0.4 4 -10.0 5 -0.4 -0.4 6 -0.4 -0.4 7 0 0 8 0 0 REC 0 -0.4 -0.4 -0.4 0 0
Q103~5 (2SA1037K) [V]
1Pin MODE No. STOP PLAY E 5.0 5.0 C 1.0 1.0 B REC 4.8 2.2 -
Q106 (2SA1037K) [V]
Pin MODE No. STOP PLAY E 5.0 5.0 C B REC 4.8 -
IC103 (TC7S08F) [V]
Pin MODE No. STOP PLAY 1 0 0 2 0 0 3 0 4 0 0 5 5 REC 0 2.0 2.0 -
IC203 (LA6520) [V]
Pin MODE No. STOP PLAY REC 1 0.01 0.01 0 to 0.2 0.1 to 2 0.01 0.3 0.4 0.2 to 3 0 0.3 0.3 -0.5 to 4 0.04 -0.1 -0.7 5 2.2 2.2 2.2 6 2.2 2.2 2.2 7 0 0 0 8 0 0 0 9 0 0 0 10 11 12 9.4 -10.0 -
Q107 (2SA1461) [V]
Pin MODE No. STOP PLAY E C 1.5 1.5 B 3.0 3.0 REC 1.8 3.0
IC104 (BA4560F) [V]
Pin MODE No. STOP PLAY 1 0 -0.1 2 0 -0.1 3 0 -0.1 4 -5.0 5 0 0 6 0 0 7 0 0 8 5.0 REC -0.2 -0.1 -0.1 0 0 0 -
Q109 (DTC114TS) [V]
Pin MODE No. STOP PLAY E 0 C 0 1.1 B 5.0 0 REC 1.2 0
Q111 (DTA114TK) [V]
Pin MODE No. STOP PLAY E 5.0 C 0 0 B 5.0 0 REC 4.4 0
39
CR200 SERVO UCOM BOARD ASSY
· Measuring condition: DC input unless otherwise noted.
1 2
J201 pin 10 (HF) CN204 pin 1 (RF) During CD PLAY 500mV/div 0.5µS/div
5 2
IC205 pin 63 (MIRR) 2V/div CN204 pin 1 (RF) 0.5V/div During manual search 0.5mS/div
9 10 11
IC356 pin 48 (SPSP) 2V/div IC205 pin 13 (CLV) 10V/div IC205 pin 14 (ECLV) 10V/div In the FCS ON test mode SPDL ON (CD) 20µS/div TRK OPEN
1 19 20
J201 pin 10 (HF) IC356 pin 23 (RFT)
IC356 pin 24 (RFB) During CD-R PLAY (in common with GND of 1 and 19) 1V/div 1mS/div
1
5 GND 2 GND GND GND 9 GND 10 11 GND GND 19 20 GND 1 GND
2
3
CN204 pin 2 (TE) Test mode TRK, CLOSE state Top : FILTER exist Bottom : FILTER none 500mV/div 0.5mS/div
6 10 11
IC206 pin 4 (MDP) 2V/div IC205 pin 13 (CLV) 10V/div IC205 pin 14 (ECLV) 10V/div During CD PLAY 20µS/div
12 13
IC205 pin 19 (FGIN) IC205 pin 17 (FGOUT) In the test mode FCS ON SPDL ON (CD) TRK OPEN 2V/div 2mS/div
21 22
J209 pin 5 (DOUT) 5V/div J208 pin 13 (MCK) 2V/div During CD PLAY 0.1µS/div
6 GND 10 GND 11 GND GND GND
12 GND
21 22
GND
13 GND
GND
3
CN204 pin 2 (TE) Test mode FSC, SPDL ON TRK, OPEN state Top : FILTER exist Bottom : FILTER none 500mV/div 0.5mS/div
7 10 11
IC207 pin 4 (MDP) 2V/div IC205 pin 13 (CLV) 10V/div IC205 pin 14 (ECLV) 10V/div During CD-R REC 20µS/div
14 15 16
IC206 pin 34 (DATA) IC206 pin 32 (LRCK) IC206 pin 35 (BCLK) During CD PLAY (1kHz 0dB) 10V/div 2µS/div
IC208 (LM2940CT-5.0) [V]
Pin MODE No. STOP PLAY U 9.3 G 0 +5 5.0 REC -
GND GND
7 GND 10 11 GND GND
14 15 16
GND GND GND
IC311 (PST529C) [V]
Pin MODE No. STOP PLAY 1 5. 0 5.0 2 0 0 3 5. 0 5.0 REC 5.0 0 5.0
4
CN204 pin 6 (FE) Test mode TRK, CLOSE state 0.5V/div 2mS/div
8 10 11
IC205 pin 9 (SPDLO) 1V/div IC205 pin 13 (CLV) 10V/div IC205 pin 14 (ECLV) 10V/div During STOP 20µS/div
17 18
J201 pin 11 (WBL) 50mV/div IC207 pin 1 (WBL) 2V/div During CD-R PLAY 2