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MD-MT866H
Service manual
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User Manual
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Sharp MDMT-866-H, MDMT-866-W Service manual

MD-MT866H/MD-MT866W
SERVICE MANUAL
No. S0079MDMT866H
PORTABLE MINIDISC RECORDER
MD-MT866H(S)
MODEL MD-MT866W(S)
• In the interests of user-safety the set should be restored to its original condition and only parts identical to those specified be used.
CONTENTS
Page
SAFETY PRECAUTION FOR SERVICE MANUAL ............................................................................................................... 2
SPECIFICATIONS ................................................................................................................................................................. 3
NAMES OF PARTS ............................................................................................................................................................... 4
OPERATION MANUAL .......................................................................................................................................................... 6
DISASSEMBLY.................................................................................................................................................................... 12
REMOVING AND REINSTALLING THE MAIN PARTS....................................................................................................... 13
ADJUSTMENT ...................................................................................................................................................................... 14
BLOCK DIAGRAM ............................................................................................................................................................... 29
SCHEMATIC DIAGRAM ...................................................................................................................................................... 30
WIRING SIDE OF P.W.BOARD........................................................................................................................................... 32
VOLTAGE ............................................................................................................................................................................ 36
WAVEFORMS OF MD CIRCUIT ......................................................................................................................................... 37
TROUBLESHOOTING ......................................................................................................................................................... 38
FUNCTION TABLE OF IC.................................................................................................................................................... 41
PARTS GUIDE/EXPLODED VIEW PACKING METHOD (MD-MT866H(S) FOR U.K. ONLY)
SHARP CORPORATION
This document has been published to be used for after sales service only. The contents are subject to change without notice.
MD-MT866H/MD-MT866W
Laser Diode Properties
● Material: GaAIAs
● Wavelength: 785 nm
● Pulse time:
Read mode; 0.8 mW Continuous Write mode; max. 10 mW 0.5S
min. cycle 1.5S
Repetition
SAFETY PRECAUTION FOR SERVICE MANUAL
Precaution to be taken when replacing and servicing the Laser Pickup.
The AEL (Accessible Emission Level) of Laser Power Output for this model is specified to be lower than Class I Require­ments. However, the following precautions must be observed during servicing to protect your eyes against exposure to the laser beam.
(1) When the cabinet has been removed, the power is
turned on without a compact disc, and the Pickup is on a position outer than the lead-in position, the Laser will light for several seconds to detect a disc. Do not look into the Pickup Lens.
(2) The Laser Power Output of the Pickup inside the unit
and replacement service parts have already been adjusted prior to shipping.
(3) No adjustment to the Laser Power should be attempted
when replacing or servicing the Pickup.
(4) Under no circumstances look directly into the Pickup
Lens at any time.
(5) CAUTION - Use of controls or adjustments, or
performance of procedures other than those specified herein may result in hazardous radiation exposure.
LASER KLASSE 1 LUOKAN 1 LASERLAITE KLASS 1 LASERAPPARA
MD-MT866H(S) Except for U.K.
MD-MT866W(S) MD-MT866H(S) Except for U.K.
MD-MT866W(S) MD-MT866H(S) for U.K.
Precaution to be taken when replacing and servicing the laser pickup. The following precautions must be observed during servicing to protect your eyes against exposure to the laser.
Warning of possible eye damage when repairing: If the AC adaptor or batteries are connected when the top housing (disc cover) of the unit is removed, and the PLAY key is pressed, the laser will light up during focus access (2-3 seconds). (Fig. 3-1) During the operation, the laser will leak from the opening between the magnetic head and the mechanical chassis (Fig. 3-2). In order to protect your eyes, you must not look at the laser during repair. Before repairing be sure to disconnect the AC adaptor and remove the batteries.
– 2 –
MD-MT866H/MD-MT866W
Magnet head
Mechanism
Magnet Head
Chassis
Optical pickup
Top Cabinet
Spindle motor
Main PWB
Optical Pick-Up
Figure 3-1 Figure 3-2
FOR A COMPLETE DESCRIPTION OF THE OPERATION OF THIS UNIT, PLEASE REFER TO THE OPERATION MANUAL.
SPECIFICATIONS
Power source DC 1.2V: Rechargeable Nickel-Metal Hydride battery (AD-N55BT) x 1
Power consumption 7 W (AC adaptor) [MD-MT866H(S)] Power consumption 0.15 A (AC adaptor) [MD-MT866W(S)]
Output power RMS; 10 mW (5 mW + 5 mW) (0.2% T .H.D .) Charging time Approx. 3.5 hours Battery life When using the rechargeable battery Continuous recording: Approx. 6.5 hours
Input sensitivity MIC H: reference input level 0.25 mV input impedance 10 k ohms
Output level Earphones: maximum output level 5 mW + 5 mW load impedance 32 ohms
Dimensions Width: 72.0 mm (2-27/32”) Height:19.5 mm (25/32”) Depth: 78.9 mm (3-1/8”) Weight 137 g (0.30 lbs.) with rechargeable battery Input socket Line/optical digital, microphone (powered by the main unit) Output socket Earphones (impedance: 32 ohms)/remote control unit Type Portable MiniDisc recorder Signal readout Non-contact, 3-beam semi-conductor laser pick-up Audio channels Stereo 2 channels/monaural (long-play mode) 1 channel Frequency response 20 – 20,000 Hz (± 3 dB) Rotation speed Approx. 400 – 1,350 rpm Error correction ACIRC (Advanced Cross Interleave Reed-Solomon Code) Coding ATRAC (Adaptive Transform Acoustic Coding), 24-bit computed type Recording method Magnetic modulation overwrite method Sampling frequency 44.1 kHz (32 kHz and 48 kHz signals are converted to 44.1 kHz, and then recorded.) Wow and flutter Unmeasurable (less than ±0.001% W. peak)
DC 5V: AC adaptor (AC 220 - 230V, 50/60 Hz) [MD-MT866H(S) Except for U.K.] DC 5V: AC adaptor (AC 230 - 240V, 50/60 Hz) [MD-MT866H(S) for U.K.] DC 5V: AC adaptor (AC 110 - 240V, 50/60 Hz) [MD-MT866W(S)] DC 1.5V: Commercially available, “AA” size (LR6), alkaline battery x 1 DC 1.5V: Separately available car adaptor, AD-CA55X (for cars with a 12-24V DC negativ e earth electrical system)
(fully charged) included with the unit Continuous play: Approx. 12 hours When using one, commercially available, high Continuous recording: Approx. 6 hours
capacity, “AA” size (LR6), alkaline battery (The Continuous play: Approx. 18 hours rechargeable battery is in the unit, discharged)
When using one, commercially available, high Continuous recording: Approx. capacity, “AA” size (LR6), alkaline battery with Continuous play: Approx. 30 hours the rechargeable battery (fully charged)
●
The continuous recording time is for analogue inputs when the volume level is set to “VOL 0”
● The continuous play time shows the value when the volume level is set to “VOL 15”
● The above values are the standard values when the unit is charged and used at an ambient temperature of 20°C
(68°F).
● The operating time when using an alkaline battery may be different, depending on the type and manufacturer of the battery, and on the operating temperature.
MIC L: reference input level 2.5 mV input impedance 10 k ohms LINE: reference input level 100 mV input impedance 20 k ohms
LINE: specified output 250 mV (-12 dB) load impedance 10 k ohms
15.5
hours
(LCD edge light off)
Laser Beam
(LCD edge light off)
.
.
Specifications for this model are subject to change without prior notice
– 3 –
MD-MT866H/MD-MT866W
2
1
3
4
5
6
7
8
9
10
11
12
13
14
Main unit
1. Volume/Cursor/Bass/Delete Left Shuttle Switch
2. Display/Character Select Button
3. Stop/Power Off/Hold Button
4. Rechargeable Battery Cover
5. Mode Button
6. Edit/Auto Mark/Time Mark Button
7. Enter/Fast Play/Synchro/F ast Forward/Fast Re verse/ Recording Level/Name Select Right Shuttle Switch
8. Handstrap Holder
9. Record/Track Mark Button
10. Play/Pause Button
11. Optical/Line Input Socket
12. Microphone Input Socket
13. Remote Control/Earphones/Line Output Socket
14. Open Lever
NAMES OF PARTS
Main unit display panel
01. Level Meter
02. Monaural Long-Play Mode Indicator
03. Record Indicator
04. Synchro Recording Indicator
05. Disc Mode Indicator
06. Disc Name Indicator
07. Track Name Indicator
08. Remaining Recording Time Indicator
09. Total Track Number Indicator
10. Fast Play Indicator
11. Repeat Indicator
12. TOC Indicator
13. Battery Indicator
14. Random Indicator
15. Track Number Indicator
16. Character/Time Information Indicator
17. LCD Edge Light
Lights around the LCD show the operating condition.
Charging Flashes slowly. Refresh Flashes quickly. Playback Flashes once slowly every 3 seconds. Recording Flashes twice slowly every 5 seconds.
Fast forward and reverse TOC Reading : Flashes
Flashes
Writing : Flashes quickly
1 2 3 4 5 6 7
17
8
9
10 11 12 13 14 15 16
– 4 –
Remote control unit
1
8
6
7
9
234 5
CHARGE
OPERATION
1
4
5
6
3
2
1. Earphones Socket
2. Fast Forward/Fast Reverse Button
3. Display Button
4. Play Mode Button
5. Sound/Track Mark Button
6. Stop/Power Off Button
7. Play/Pause Button
8. Volume Button
9. Hold Switch
MD-MT866H/MD-MT866W
Remote control display panel
01. Record Indicator
02. Track Number Indicator
03. Disc Mode Indicator
04. Character/Time Information Indicator
05. Random Indicator
06. Synchro Recording Indicator
07. Total Track Number Indicator
08. Battery Indicator
09. Repeat Indicator
Battery stand
01. Remote Control Holder
(You can hang the remote control on it.)
2. Lock Detector
3. Hook For Fixing The Main Unit
4. Charge/Operation Switch
5. Stand
6. AC Adaptor Connecting Socket
6
2
3451
789
– 5 –
MD-MT866H/MD-MT866W
OPERATION MANUAL
MD-MT866H(S) Except for U.K.
Using with the Rechargeable Battery
Charging
Charge mode
MD-MT866H(S) for U.K.
Do not force the battery cover open too far.
AC 220-230V 50/60Hz
To the DC IN
5V socket
When the rechargeable battery is used for the first time or when you want to use it after a long period of disuse, be sure to charge it fully.
1
Insert the rechargeable battery.
2
Move the Charge/Operation switch to charge mode.
3
Place the portable MD into the battery charger and connect the AC adaptor.
●
After the rechargeable battery is charged or used, it will get slightly warm. This is normal.
●
When the portable MD is turned on or operating, the bat­tery will not be charged.
Using with the Rechargeable Battery
Charging
Do not force the battery cover open too far.
Charge mode
AC 230-240V 50/60Hz
When the rechargeable battery is used for the first time or when you want to use it after a long period of disuse, be sure to charge it fully.
1
Insert the rechargeable battery.
2
Move the Charge/Operation switch to charge mode.
3
Place the portable MD into the battery charger
and connect the AC adaptor.
●
After the rechargeable battery is charged or used, it will get slightly warm. This is normal.
●
When the portable MD is turned on or operating, the battery will not be charged.
12
To the DC IN 5V socket
– 6 –
MD-MT866W(S)
Using with the Rechargeable Battery
Charge mode
Do not force the battery cover open too far.
MD-MT866H/MD-MT866W
Charging
When the rechargeable battery is used for the first time or when you want to use it after a long period of disuse, be sure to charge it fully.
1
Insert the rechargeable battery.
2
Move the Charge/Operation switch to charge mode.
3
Place the portable MD into the battery charger and connect the AC adaptor.
●
After the rechargeable battery is charged or used, it will get slightly warm. This is normal.
●
When the portable MD is turned on or operating, the bat­tery will not be charged.
To the DC IN 5V socket
AC 110-240V 50/60Hz
Checking the remaining amount of battery level
The remaining amount of battery level is shown by the battery indicator ( ) during operation.
How to read the battery indicator
When the battery level is high
●
When the battery is completely discharged, the battery indicator will flash. Recharge the battery or replace the alkaline battery with a new one.
●
When the battery has run completely out, “BATT EMPTY (LoBATT)” will appear. Then, the power will be discon­nected automatically.
Notes:
●
If you use the battery which you stopped charging half­way, “ is completely charged.
●
The battery indicator will not correctly display the remain­ing capacity for approximately 10 seconds after the power has been turned on.
●
When the AC adaptor or a separately available car adap­tor is used, the battery indicator will not be shown.
●
The number of bars shown in the battery indicator may increase or decrease, depending on the operation being performed. This is normal.
” may appear. It does not mean that the battery
When the battery
level is very low
– 7 –
MD-MT866H/MD-MT866W
Error Messages
ERROR MESSAGES
BATT EMPTY
(LoBATT)
BLANK MD
(BLANK)
Can’t COPY
(Can’tC)
Can’t EDIT
(Can’tE)
Can’t READ *
(Can’tS) (Can’tT) (Can’tU)
Can’t REC
(Can’tR)
Can’t STAMP Can’t WRITE
(Can’tW)
CHARGEmode
DEFECT
(DEFECT)
DISC FULL Er-MD **
(ErMD*)
HOLD
(HOLD)
LOCKED
(Can’tLOCK)
● The battery is run down.
● Nothing is recorded.
● You tried to record from a copy prohib-
● A track cannot be edited.
● The disc data cannot be read because the
● Recording cannot be performed correctly
● Stamp function does not work.
● Cannot save the TOC information correctly
● The Charge/Operation switch is not set to
● The disc is scratched.
● The disc is out of recording space.
● The microprocessor has reported a sys-
● The unit is in the hold mode.
● You removed a MiniDisc whilst recording
MEANING
ited MiniDisc.
disc is damaged.
due to vibration or shock.
to a MiniDisc. (A large portion of the disc has been damaged.)
the operation mode when using this unit with the AC adaptor.
tem fault and the unit is out of order.
or editing.
REMEDY
● Charge the rechargeable battery or replace the alkaline battery (or use the AC adaptor for power).
● Replace the disc with a recorded disc.
● Record using the analogue cable.
● Change the stop position of the track and then edit it.
● Reload the disc.
● Replace it with another recorded disc.
● Re-record or replace it with another recordable disc.
● Check the number of tracks.
● Replace the disc with another recordable disc.
● Set the Charge/Operation switch to the operation mode.
● If the sound you hear is not right, record again.
● Replace the disc with another recordable disc.
● Replace it with another recordable disc.
● T o have it repaired, go to the distributor where you purchased the
unit.
● Return the HOLD switch to its original position.
● Turn off the power and remove the MiniDisc.
ERROR MESSAGES
NO DISC NO SIGNAL
(noSIG.)
PLAY MD
(PLAYmd)
POWER ? PROTECTED
SORRY
(SORRY)
TEMP OVER
(TEMP!)
TOC FORM **
(Tform**)
TOC FULL
Tr. Protect ? DISC
(? DISC)
● A disc has not been loaded.
● Poor connection of the digital cable.
● No output signal comes out from the con-
nected unit to playback.
● The input signal has improper sampling frequency.
● You recorded on a playback-only disc.
● The battery charger is defective.
The write protection tab of a MiniDisc is
●
set to the protected position.
●
You tried to record on a playback-only disc.
● Since a track number is currently being located or updated, the unit cannot accept your command.
● The temperature is too high.
● There is an error in the recording
signal.
● There is no space left for recording char­acter information (track names, disc names, etc.).
● The track has been protected from being erased.
● A disc which contains data other than music was played.
● There is an error in the signal recorded on the disc.
● Stamping is not possible.
MEANING
( ): Error messages seen on the remote control. Number or symbol appears in * position.
REMEDY
● Load a disc.
● Connect the digital cable securely.
●
If the portable CD player has a function to prevent sound skips, deacti­vate it.
● Playback with the connected unit.
●
Replace it with a recordable disc.
● To have it repaired, go to the distributor where you purchased the unit. Move the write protection tab back to its original position.
●
● Replace it with a recordable MiniDisc.
● Wait for a while and try the operation again.
● Turn off the power, and wait for a while.
● Erase all of the tracks, and then record again.
● Replace it with another recordable disc.
● Edit the track with the device on which it was recorded.
● A disc which contains non-music data cannot be played.
● Replace it with another recorded disc.
● Retry.
– 8 –
MD-MT866H/MD-MT866W
MiniDisc System Limitations
The unit may have the following symptoms whilst recording or editing. The unit is not out of order.
SYMPTOM
“DISC FULL” or “TOC FULL” appears even though the MiniDisc still has recording time left.
The remaining recording time does not in­crease even though you erased tracks.
The total of the recorded time and the re­maining time does not match the maximum recordable time.
Combine function does not work.
Sound skips in fast reverse/forward.
A track number is created in the middle of a track.
LIMITATIONS
More than 255 tracks (maximum) cannot be recorded regardless of the re­cording time. If the MiniDisc is recorded or edited repeatedly or if it has scratches (record­ing skips scratched parts), you may not be able to record the maximum tracks above.
The unit does not count non-recorded portions that last 12 or fewer seconds to display the remaining recording time. The time may not increase even if you erase short tracks.
One cluster (approximately 2 seconds) is the minimum unit for recording. For example, a 3-second track uses 2 clusters (approximately 4 seconds). Therefore, the actual recordable time may be shorter than the displayed time.
A MiniDisc on which recording and editing are repeated may not allow the combine function.
One track is divided and recorded in separate places on a repeatedly re­corded or edited MiniDisc. Sound may skip.
A track number may be created if there are scratches or dust on the MiniDisc.
Troubleshooting
Many potential “problems” can be resolved by the owner without calling a service technician. If something seems to be wrong with this product, check the following before calling your authorised SHARP dealer or service centre.
PROBLEM CAUSE
The unit does not turn on.
No sound is heard from the ear­phones.
When the operation buttons are pressed, the unit does not respond.
Some sounds are skipped.
The MiniDisc cannot be ejected.
Recording and editing are impos­sible.
● Is the AC adaptor disconnected?
● Is the battery exhausted?
● Is the unit in the hold mode?
● Has condensation formed inside the unit?
● Is the unit being influenced by mechanical shock or by static electricity?
● Is the volume set too low?
● Is the remote control unit or the earphones plugged in?
●
Are you trying to play a MiniDisc with data on it instead of a MiniDisc containing music?
● Is the unit in the hold mode?
● Is the battery exhausted?
● Is the remote control unit plug or the earphones plug inserted firmly?
● Is the battery exhausted?
● Is the unit being subjected to excessive vibration?
● Has the track number or character information been updated on the disc yet?
● Is the unit in the recording or editing mode?
● Is the MiniDisc protected against accidental erasure?
● Is the unit connected properly to the other equipment?
●
Is the AC adaptor unplugged or did a power failure occur whilst recording or editing?
● Is the unit in the hold mode?
● Is an optical signal being output from the stereo system?
Read the operation manual for the stereo system.
– 9 –
MD-MT866H/MD-MT866W
1
Insert a MiniDisc
2
Connect the AC adaptor
222
1
1
Slide the OPEN lever to re­lease the compartment door.
2
Lift it up the compartment.
Recordable
Recording prevented
4
Insert according to the direction arrow.
33
3
Insert a MiniDisc as shown.
4
Close the compartment door.
When you record on a MiniDisc, check that the erase prevention tab is set to the “recordable” position.
To the DC IN 5V socket.
RELEASE
LOCK
Insert securely, all the way in.
MD-MT866H(S) Except for U.K. AC 220-230V 50/60Hz
MD-MT866W(S) AC 110-240V 50/60Hz
MD-MT866H(S) for U.K. AC 230-240V 50/60 Hz
To wall socket.
3
Connection
OPTICAL/
LINE IN
White: To Left
Red: To Right
AUDIO OUT
NOTE:
Refer to (operation manual) for connecting the unit to a stereo system with “DIGITAL OUT” or “OPTICAL OUT” sockets.
To a stereo system with “A UDIO OUT” or “LINE OUT” soc kets. (See left. Analogue connection)
Note:
LEFTRIGHT
● If the audio system has only one pair of socket then they are usually input only and recording via this con­nection is not possible.
3
1
Move the Charge/Operation switch to CHARGE mode (RE­LEASE).
2
Insert the portable MD into the battery charger.
Before using the unit with a rechargeable battery, the battery has to be charged. Refer to “Using with the rechargeable battery”.
Caution:
● Before setting the main unit to the battery charger, make sure the battery charger is in CHARGE mode (RELEASE). If you insert the main unit by force whilst in OPERATION mode (LOCK), the hook for fixing the main unit may break.
● If the Charge/Operation switch is not set to OPERATION mode, no operation is possible. Ref er to “How to use the Charge/Operation s witch”.
Move the Charge/Operation switch to OPERATION mode (LOCK).
4
Plug the AC adaptor.
– 10 –
MD-MT866H/MD-MT866W
Preparation for use
if the • ■ / :OFF button is set to HOLD.
CAUTION:
It is not recommendable to put the MiniDisc into a rear pocket, as this may damage the product when sitting.
The unit does not work
Press the • ■ / :OFF button for 2 seconds or more.
Hold
Released
Move it to operation mode when playing back or recording.
For operations
Operation mode
Recording
Check that the unit is connected to the stereo system.
1 Press the REC button.
●Record pause mode is entered.
●The REC button does not light.
2 Begin playback on the stereo system connected to this unit.
●To enable the record level to be set.
3 Move the right shuttle switch or to adjust the record-
ing level.
●
Adjust the recording level so that the maximum sound volume from the source makes the reading swing somewhere between –4 dB and 0 dB.
●
This unit can adjust the digital recording level just the same as the ana­logue recording.
Level meter indicator
0dB 4dB
Recording: continued
4
Press the P AUSE b utton on the stereo system to enter the play­back pause mode at the point you wish to start recording.
●
Here you can select the track to be recorded.
5
Press the button to start the MiniDisc unit recording.
6
Begin playback on the stereo system, the output will be re­corded.
To stop recording
Press the • ■ / :OFF button.
● When recording stops, “TOC” ap-
pears (Table Of Contents). Whilst “TOC” appears the MiniDisc re­corded contents have not yet been updated.
● To prevent the new recording from being lost it is not possible to re­move the MiniDisc whilst “TOC” is displayed.
TOC display
To update the recor ded contents of the MiniDisc
Press the • ■ / :OFF button whilst in the stop mode.
● The power turns off after recorded contents have been updated on the MiniDisc.
About the TOC
After any recording or editing function “TOC” (Table Of Contents) is displayed. T o finalise the recording or editing func­tion, press the • ing this process “TOC” will flash and “TOC EDIT!” will be displayed. During any recording or editing func­tion the MiniDisc unit Lid is locked, the MiniDisc can not be removed until the process is finalised.
Warning
●If the power is removed (Battery/AC adapter) whilst “TOC” is displayed the MiniDisc unit lid will remain locked until the battery/main power is restored and the unit is turned on. Your new recordings or edited changes will be lost and your MiniDisc may become unusable.
■ / :OFF button. Dur-
Playing
1
Insert the earphones plug firmly into the earphones socket on the remote control unit.
2
Plug the remote control into the socket on the unit.
3
Insert a MiniDisc.
4
Press the button.
● Playback starts automatically with a playback only MiniDisc or a MiniDisc which is protected against accidental erasure (Auto-play function).
To stop playback
Press the • ■ / :OFF button (Remote control: press the ■ button).
● If the unit is not operated for at least 2 minutes whilst in the stop mode, the power will shut off automatically.
– 11 –
MD-MT866H/MD-MT866W
DISASSEMBLY
Cares before disassembling
When assembling the machine after disassembling or repair, observe the following requirements so as to ensure safety and performance.
1. Remove the batteries from the machine, and take out the mini-disc.
2. When assembling after repair, be sure to position the wires in the same location. Use the specified screws to fix the cabinet and the mechanism unit. The use of the screws with length other than specified may cause contact with the mechanism unit resulting in malfunction.
3. When repairing, pay close attention so not to damage the IC from static electricity.
STEP
REMOVAL
1 Bottom Cabinet 1. Screw .....................(A1) x5 12-1
2 Top Cabinet 1. Open the Top cabinet.
3 Main PWB 1. Open the Battery Cover.
4 Mechanism Unit 1. Raise the rear part, and 12-3
5 LCD PWB 1. hook........................(D1) x4 12-4
PROCEDURE
2. Screw ..................... (B1) x4
3. Flexible PWB.......... (B2) x1 12-2
2. Screw .................... (C1) x1 12-2
3. Flexible PWB......... (C2) x2
remove in the arrow direction.
2. Screw...................... (D2) x4
FIGURE
12-1
(A1)x2 ø1.4x2mm
Bottom Cabinet
(C2)x1*
Battery Cover
(B1)x2 ø1.4x2mm
OPEN
Eject Knob
(A1)x1 ø1.4x2mm
pull
Top Cabinet
Figure 12-1
Main PWB
pull
(A1)x2 ø1.4x2mm
(B1)x2 ø1.4x2mm
OPENOPEN
(A1)x1 ø1.4x2mm
(B2)x1
(C2)x1
(C1)x1 ø1.4x2mm
(D2)x2 ø1.4x1.5mm
(D1)x2
(D2)x2 ø1.4x1.5mm
Figure 12-4
(D1)x2
LCD PWB
Top Cabinet
Frame Unit
Caution:
Carefully handle the main PWB and flexible PWB. After removing the flexible PWB (1*) for the optical pickup from the connector, do not touch directly the front end of flexible PWB with your hand so as to prevent damage of optical pickup by static electricity.
Main
Figure 12-2
MD Mechanism
Main Frame Unit
Figure 12-3
– 12 –
REMOVING AND REINSTALLING THE MAIN PARTS
Remove the mechanism according to the disassembling meth­ods 1 to 4. (See Page 12.)
How to remove the spindle motor (See Fig. 13-1.)
1. Remove the solder joints (A1) x 4 of flexible PWB.
2. Remove the screws (A2) x 3 pcs., and remove the spindle motor.
How to remove the Lift motor (See Fig. 13-2.)
1. Remove the solder joints (B1) x 2 of lift motor lead wire.
2. Remove the screw (B2) x 1 pc., and remove the lift motor.
Note:
Take care so that the motor gear is not damaged. (If the gear is damaged, noise is caused.)
MD-MT866H/MD-MT866W
(A2)x3 ø1.4x3mm
Spindle Motor
Solder Joints (A1)x4
How to remove the sled motor (See Fig. 13-3.)
1. Remove the stop washer (C1) x 1 pc., and remove the drive
gear (C2) x 1 pc.
2. Remove the screws (C3) x 2 pcs.
3. Remove the solder joints (C4) x 3 of flexible PWB., and
remove the sled motor.
Note:
Take care so that the motor gear is not damaged. (If the gear is damaged, noise is caused.)
How to remove the magnetic head (See Fig. 13-4.)
1. Remove the screws (D1) x 2 pcs. of the magnetic head and
the optical pickup, and remove the soldering (D3) x 2 pcs. of the head flexible plate.
Note:
Mount carefully so as not to damage the magnetic head.
How to reinstall the optical pickup (See Fig. 13-4.)
1. Remove the screw (E1) x 1 pc., and remove the grip spring.
2. Remove the screw (E2) x 1 pc. to remove the thrust
spring, and remove the drive screw and the optical pickup from MD mechanism. Then, remove the drive screw from the optical pickup.
(E1)x1 ø1.4x1.8mm
Drive Screw
Grip Spring
(D1)x2 ø1.4x1.8mm
(D3)x2 Solder Joints
(E2)x1
ø1.4x1.8mm
MD Mechanism
Figure 13-1
Figure 13-2
(C1)x1
(C2)x1
MD Mechanism
(B2)x1 ø1.4x3.8mm
Lift Motor
Solder Joints (B1)x2
(C3)x2
ø1.4x1.2mm
Solder Joints (C4)x3
Sled Motor
Optical Pickup
Figure 13-4
Thrust Spring
MD Mechanism
– 13 –
MD Mechanism
Figure 13-3
MD-MT866H/MD-MT866W
Test disc
ADJUSTMENT
MD adjustment needs two types of disc, namely recording disc (low reflection disc) and playback-only disc (high reflection disc).
Type
1 High reflection disc MMD-110 (TEAC Test MD) 88GMMD-110 2 Low reflection disc MMD-213A (TEAC Test MD) 88GMMD-213A 3 Low reflection disc Recording minidisc UDSKM0001AFZZ
Test disc Parts No.
Note: Use the low reflection disc on which music has been recorded.
Entering the TEST mode
1. Setting at port (in standby state, disc-free state or power nonconnected state)
(1) Set the port as follows. TEST1 : "Low" TEST0 : "High" (2) Press the PLAY button in the standby state (it is allowed to insert the disc or to connect the power supply). (3) Test Mode STOP [ T E S T _ ]
2. Setting by special button operation (in standby state)
Test mode: Perform it with the remote control. (1) Press and hold the "PLAY MODE" button on the remote control and press the "PLAY" button. (2) Release only the "PLAY MODE" button. (3) Press and hold only the "PLAY" button and press the "VOL-" button. (4) Normal mode setting initialization (BASS setting, VOL setting, etc.) (5) Test Mode STOP [ T E S T _ ] (6) Press "VOL+" to check the microcomputer version. (7) Press "VOL–" to light up all the LCDs.
Leaving the TEST mode
(1) Press the STOP button in the TEST mode stop state or version indicating state or whole LCD lighting state. (2) EEPROM rewrite-enable area updating. (3) Change to standby state
Shipping setting method
(1) Insert the battery. (2) Close the battery lid twice in succession while pressing the VOLUME-DOWN button and the PLAY button on the main unit at the same
time.
(3) Make sure the display changes from [INIT] to [BYE OK].
Test Mode
1. AUTO 1 Mode • Perform preliminary automatic adjustment.
2. AUTO 2 Mode
3. TEST-PLAY Mode
4. TEST-REC Mode
5. MANUAL 1 Mode
• If the combination of mechanism and pickup PWB has been changed, be sure to start from
AUTO1.
• Perform ATT (attenuator) automatic adjustment.
• Perform continuous playback (error rate display, jump test)
• Continuous playback from the specified address is performed.
• 1 line, 10 lines or 384 lines manual jump is performed.
• C1 error rate display (pit section), ADIP error rate display (groove section)
• The temperature correction is performed only when servo start is performed, but the posture correction is not performed during continuous playback.
• Continuous record from the specified address is performed.
• Change of record laser output (servo gain is also changed according to laser output).
• The temperature correction is performed only when servo start is performed, but the posture correction is not performed during continuous recording.
• Temperature is displayed.
• Seeing the displayed adjustment value, perform
preliminary manual adjustment. (Error rate indication, jump test)
6. MANUAL 2 Mode
7. ERROR INFORMATION Mode • Error information is initialized
8. NORMAL Mode
9. EEPROM Mode
• Temperature is displayed.
• Seeing the displayed adjustment value, perform ATT (attenuator) manual adjustment.
• Continuous playback is performed (error rate display, jump test).
• Error information is displayed.
• The mode is changed from the TEST mode to the normal mode without adjustment.
• In the normal mode the internal operation mode, memory capacity, etc. areindicated.
• In the normal mode both temperature correction and posture correction are performed.
• Factors of digital servo are changed manually. (Each servo is turned on individually.)
• Cut-off frequency of BASS1, BASS2 and BASS3 is selected manually.
• Temperature detection terminal voltage is measured, and the reference value is set.
• Defaults are selected and set.
• Setting of EEPROM protect area is updated. (In case of protect releasing)
– 14 –
MD-MT866H/MD-MT866W
Operation in each TEST mode
1. AUTO1 Mode
• When the STOP button is pressed while the AUTO1 menu appears or during automatic adjustment, the mode changes to the TEST mode stop state. At this time the adjustment value is not output.
• Be sure to adjust, using the specified disc MMD-213A.
• Adjustment NG; Adjustment item out of range, focus ON failure, and adjustment error
• When the PLAY button is pressed while ADJ. OK is displayed, AUTO2 is executed.
2. AUTO2 Mode
• When the STOP button is pressed while the AUTO2 menu appears or during automatic adjustment, the mode changes to the TEST mode stop state. At this time the adjustment value is not output.
• Adjustment NG; Adjustment item out of range, and adjustment error.
• When the PLAY button is pressed while ADJ. OK is displayed, TEST_PLAY is executed.
3. MANUAL1 Mode
• Adjustment item to be made in AUTO1 mode is performed manually.
• When the VOL UP button is pressed during adjustment, the setting increases, and the new setting is output.
• When the VOL DOWN button is pressed during adjustment, the setting decreases and the new setting is output.
• If the VOL UP/DOWN button is held down, the setting changes continuously with 100 ms cycle.
*In this operation, the setting change is performed for each digit. The digit is changed by pressing the MODE button.
• If the setting is within the allowable range, the RANDOM display lights.
• When the STOP button is pressed during MANUAL1 menu or measurement or adjustment, the state is changed to the TEST mode stop state.
4. MANUAL2 Mode
• Adjustment item to be made in AUTO2 mode is performed manually.
• When the VOL UP button is pressed during adjustment, the setting increases, and the new setting is output.
• When the VOL DOWN button is pressed during adjustment, the setting decreases and the new setting is output.
• If the VOL UP/DOWN button is held down, the setting changes continuously with 100 ms cycle.
*In this operation, the setting change is performed for each digit. The digit is changed by pressing the MODE button.
• If the setting is within the allowable range, the RANDOM display lights.
• When the STOP button is pressed during MANUAL2 menu or measurement or adjustment, the state is changed to the TEST mode stop state.
• When the PLAY button is pressed in B-ATT set state, the mode is changed to the continuous playback mode.
• As for operation during continuous playback refer to "TEST-PLAY mode explanation".
5. TEST-PLAY Mode
• When the STOP button is pressed while the TEST-PLAY menu appears, or in TEST-PLAY or continuous playback mode, the mode changes to the TEST mode stop state.
• When the PLAY button is pressed while the TEST-PLAY menu appears, continuous playback is initiated from the current pickup position.
• Whenever the DISP button is pressed in the TEST-PLAY menu, the target address changes as follows.
When the PLAY button is pressed while a target address is displayed, continuous playback is performed after searching that address.
• Each time the MODE button is pressed while the TEST-PLAY mode target address is displayed, the digit which is changed by pressing the SKIP UP/DOWN button is changed as follows.
• When the SKIP UP button is pressed in the TEST-PLAY mode target address is displayed, the digit of address specified by the MODE button is set to +1h. (0 to F)
• When the SKIP DOWN button is pressed in the TEST-PLAY mode target address is displayed, the digit of address specified by the MODE button is set to -1h. (0 to F) * When the SKIP UP/DOWN button is held down, the setting changes continuously, one cycle being 100 ms.
• When the BASS button is pressed in the continuous playback mode, the number of jump lines changes as follows.
* After the number of jump lines is indicated for one second, the address indication is restored. [ T R _ ]
• When the SKIP UP button is pressed in the continuous playback mode, the specified number of lines is jumped in the FWD direction.
• When the SKIP DOWN button is pressed in the continuous playback mode, the specified number of lines is jumped in the REV direction. * When the SKIP UP/DOWN button is held down, jump is repeated every approx. 100 ms.
•Whenever the DISP button is pressed in the continuous playback mode, the indication changes as follows. * Pre-mastered disc
Continuous playback (SUBQ address indication) [ S Q ]
Continuous playback (C1 error indication) [ C E ]
Continuous playback (SUBQ address indication) [ S Q ]
* Recordabl disk
Continuous playback (ADIP address indication) [ A P ]
Continuous playback (C1 error indication) [ C E ]
Continuous playback (ADIP error indication) [ A E ]
Continuous playback (ADIP address indication) [ A P ]
0032 — 03C0 — 0700 — 08A0 — 0950— 0032 —
0032 — 0032 — 0032 — 0032 —
1 — 10 — 100 step — 1
|
|
|
|
|
– 15 –
MD-MT866H/MD-MT866W
6. TEST-REC Mode
• When the STOP button is pressed while the TEST-REC menu appears, or in the TEST-REC mode or continuous record mode, the mode changes to the TEST mode stop state.
• Whenever the DISP button is pressed in the TEST-REC menu, the target address changes as follows.
0032 — 03C0 — 0700 — 08A0 —0950 — 0032 —
When the PLAY button is pressed while a target address is displayed, continuous playback is performed after searching that address.
• Whenever the MODE button is pressed in the TEST-REC mode target address is displayed, the digit which is changed by the SKIP UP/ DOWN button changes as follows.
0032 — 0032 — 0032 — 0032 —
• When the SKIP UP button s pressed in the TEST-REC mode target address is displayed, the digit of address specified by the BASS button is set to +1h.(0 to F)
• When the SKIP DOWN button is pressed in the TEST-REC mode target address is displayed, the digit of address specified by the BASS button is set to -1h. (0 to F) * When the SKIP UP/DOWN button is held down, the setting changes continuously, one cycle being 100 ms.
• When the VOL UP/DOWN button is pressed in the TEST-REC mode or continuous record mode, the laser record power changes. (Servo gain changes also according to record power.) * After the laser record power is indicated for one second, the address indication is restored. [ R P W _ ]
• : Address
• : Laser power cord
• Operation is disabled if the premastered disc or disc is in miserase-protected state.
7. NORMAL Mode
• When the STOP button is pressed while the NORMAL menu appears, the mode changes to the TEST mode stop state.
• Indication during operation Indication of memory capacity on main unit LCD [ ] + Level meter
: Internal mode : Address (Cluster section)
• Selection of sound volume, BASS, etc. is possible (without indication)
• Recording is also possible.
• If the STOP button is pressed during operation in the NORMAL mode, the NORMAL mode is cancelled, and the power is turned off.
: Address (Sector section)
8. Error data display Mode
• Reversing when SKIP DOWN button is pressed
• When the STOP button is pressed while the error data indication menu appears or during error data indication, the mode changes to the TEST mode stop state.
• Error data 0 is the latest error.
• Error which occurred in the TEST mode is also stored in the memory.
• When the DISP button is pressed while the error data indication menu appears, the error data is initialized. [ C L E A R _ ]
• : Error Code
Explanation of error history code
13h : Adjustment servo retraction excessive retrial 16h : C. IN detection time-over 17h : A, B, E, F, and TCRSO offset measurement value out of tolerable range 21h : Focus retraction completion allowable time-over 23h : Track search completion allowable time-over 32h : P-TOC read failure 42h : U-TOC read failure 44h : U-TOC write data write disabled/read check error 45h : U-TOC write test failure 52h : SD write data write disabled 71h : Pickup position initialization time-over 72h : EEPROM data read check sum error 73h : Record head drive disabled (by EJECT lever) 82h : Power overvoltage detection 91h : Ambient temperature is higher that the allowable temperature.
– 16 –
MD-MT866H/MD-MT866W
EEPROM (IC402) writing procedure
1. Procedure to replace EEPROM and write initial value of microcomputer in EEPROM
(1) Replace EEPROM. (2) Refer to the latest EEPROM data list. (3) Start the test mode. (Refer to "How to enter the test mode".) (4) Version display (At the time of settlement of the test mode by the button operation.)
[ V e r . ]
EEPROM version (C ~ Z)
Microcomputer ROM version (5) The whole LCD lights. (6) Test mode stop state.
[ T E S T ]
(7) Press the "BASS" button, and press 1 time the "SKIP DOWN" button.
[ E E P R O M ]
(8) Perform the operation to display "EEPROM SETTING MODE CHART", compare the EEPROM DATA LIST with the display,
and set according to the EEPROM DATA LIST with the VOL UP or VOL DOWN key.
(9) Set the temperature reference. (Refer to the Temperature Reference Setting Method.)
(10) Set according to the EEPROM DATA LIST.
(11) Press the stop button.
[ T E S T ] (12) Press the stop button. (13) After data is written in EEPROM, turn off power .
2. Temperature reference setting method
[1] Measurement, calculation and setting procedure
(1) Set the TEST mode. (2) Start the EEPROM mode 'Temp' menu.
• Key operation in order of BASS, SKIP-DOWN x 1 time, PLAY, PLAY in the test mode STOP state.
• 'TM$$%%' is displayed. ($$= Temperature code, %% = Temperature reference) (3) Once press SKIP-UP, and determine the displayed microcomputer TEMP input AD value.
• 'TPin##' is displayed. (## = TEMP input AD value) (4) At the ambient temperature, determine the temperature corrected value from the temperature measurement value
correction table.
(5) Determine the temperature reference, using the following formula.
• Temperature reference = Microcomputer TEMP input AD value + Temperature corrected value (6) Set the temperature reference value by button operation, and check whether the temperature code indication corresponds to "Temperature
Code Identification Table".
[2] Temperature measurement value correction table [3] Temperature code identification
Ambient
temperature
+ 9oC ~ +11oC - 05h + 10.0oC +12oC ~ +14oC - 04h + 12.7oC +15oC ~ +16oC - 03h + 15.4oC +17oC ~ +19oC - 02h + 18.2oC +20oC ~ +22oC - 01h + 20.9oC +23oC ~ +24oC ± 00h + 23.6oC +25oC ~ +27oC + 01h + 26.3oC +28oC ~ +30oC + 02h + 29.0oC +31oC ~ +33oC + 03h + 31.8oC
Temperature
correction
Center
temperature
Ambient
temperature
- 9oC ~ +10oC 08h + 0.5oC
+ 3oC ~ +21oC 07h + 12.5oC +15oC ~ +33oC 06h + 23.6oC +26oC ~ +43oC 05h + 35.0oC
Temperature
correction
Center
temperature
– 17 –
MD-MT866H/MD-MT866W
EEPROM DATA LIST (EEPROM version g)
Fucus setting
Item display
FG1 _ 44H FG2 _ 7AH FF0 _ 10H FF1 _ 70H FF2 _ E8H Ff0 _ 10H Ff1 _ 48H Ff2 _ EAH FZH _ EDH FLn _ 08H FLp _ 08H DJG _ 0DH FSS _ 28H FTS _ 18H FSB _ 40H FTB _ 38H FGM _ 66H TVG _ 84H TO1 _ 50H TO5 _ 58H TOR _ 58H (RESERVE) 00H (RESERVE) 00H
Tracking setting
Item display
TG1 _ 14H TG2 _ 32H TF0 _ 10H TF1 _ 70H TF2 _ E0H Tf0 _ 10H Tf1 _ 40H Tf2 _ E4H TFS _ 00H TBo _ 20H TBt _ 12H TKo _ 20H TKt _ 0DH TDo _ 67H TDt _ 34H SCo _ 00H SCt _ 3AH SCm _ 48H CLp _ 24H CLr _ 3CH JPI _ 0EH K10 _ 65H THP _ 02H THG _ 02H
Set values
Set values
Tracking setting
Item display
TOP _ 00H TOG _ F4H T1P _ 20H (RESERVE) 00H (RESERVE) 00H (RESERVE) 00H (RESERVE) 00H
Spindle setting
Item display
SPG _ 30H SPi _ 9AH SPm _ 62H SPo _ 4FH PGM _ E0H SP1 _ 10H SP2 _ 60H SP3 _ F2H SP4 _ F2H SP5 _ 10H Sp2 _ 60H Sp5 _ 10H SD1 _ 7FH SD2 _ 7FH SPK _ EBH MPG _ 28H SPL _ 60H SPW _ 0FH SPB _ 66H SRi _ C0H SRm _ 9AH SRo _ 7BH (RESERVE) 00H (RESERVE) 00H (RESERVE) 00H
Set values
Set values
– 18 –
MD-MT866H/MD-MT866W
Sled setting
BASS setting
Item display
SKS _ 7FH SKL _ 7FH SLC _ 42H STL _ 07H STM _ 42H STE _ A6H SDV _ 60H SJP _ 03H WTm_ 18H SRV _ 54H SLT _ 5CH MVS _ 0AH SLS _ 28H SKE _ 0EH SDE _ 1CH (RESERVE) 00H (RESERVE) 00H (RESERVE) 00H (RESERVE) 00H (RESERVE) 00H (RESERVE) 00H
Item display
B1A _ 3FH B1B _ 00H B1C _ 00H B2A _ 1FH B2B _ 00H B2C _ 00H B3A _ E2H B3B _ 00H B3C _ 00H
Set values
Set values
Digital EQ setting
Item display
AHl _ 00H AHu _ 00H BHl _ 00H BHu _ 00H EHl _ 00H EHu _ 00H FHl _ 00H FHu _ 00H ALl _ 00H ALu _ 00H BLl _ 00H BLu _ 00H ELl _ 00H ELu _ 00H FLl _ 00H FLu _ 00H TH _ 00H
Item display
(RESERVE) 00H (RESERVE) 00H PCH _ 04H GCH _ 03H AGl _ 54H AGu _ 0DH BGl _ 54H BGu _ 0DH EGl _ 25H EGu _ 04H FGl _ 55H FGu _ 04H AJC _ 00H
Set values
Set values
ADJ.SET setting
Item display
COK _ 28H FAT _ C0H TAT _ 3EH CAT _ 40H FAB _ 60H
Set values
– 19 –
Item display
HQ1 _ 90H HQ2 _ 90H HSG _ 11H HSO _ FDH LQ1 _ 90H LQ2 _ 90H LSG _ 11H LSO _ 00H GQ1 _ 98H GQ2 _ 84H GSG _ 11H (RESERVE) 00H (RESERVE) 00H (RESERVE) 00H
Set values
MD-MT866H/MD-MT866W
Sled setting
Item display
CT0 _ 06H CT1 _ 01H CT2 _ 30H CT3 _ 20H RC0 _ D5H RC1 _ DEH SYC _ A6H PWL _ 54H DR1 _ 34H DR2 _ 12H IN1 _ 17H IN2 _ 11H CT6 _ 18H INH _ 00H DRH _ 64H PLE _ A6H RCE _ 94H ELT _ A0H X2T _ C0H SDF _ 1FH CHV _ 50H CT5 _ 4BH DRS _ 5AH DUP _ 00H RFL _ D0H CT4 _ D0H CG1 _ 66H R30 _ 01H R31 _ 00H FB0 _ FCH RST _ 00H (RESERVE) 00H (RESERVE) 00H (RESERVE) 00H (RESERVE) 00H (RESERVE) 00H (RESERVE) 00H (RESERVE) 00H (RESERVE) 00H (RESERVE) 00H (RESERVE) 00H (RESERVE) 00H (RESERVE) 00H (RESERVE) 00H (RESERVE) 00H (RESERVE) 00H (RESERVE) 00H (RESERVE) 00H (RESERVE) 00H (RESERVE) 00H (RESERVE) 00H
Set values
Sled setting
Item display
(RESERVE) 00H (RESERVE) 00H (RESERVE) 00H (RESERVE) 00H (RESERVE) 00H (RESERVE) 00H (RESERVE) 00H (RESERVE) 00H (RESERVE) 00H (RESERVE) 00H (RESERVE) 00H (RESERVE) 00H (RESERVE) 00H (RESERVE) 00H (RESERVE) 00H (RESERVE) 00H (RESERVE) 00H (RESERVE) 00H (RESERVE) 00H (RESERVE) 00H (RESERVE) 00H (RESERVE) 00H (RESERVE) 00H (RESERVE) 00H (RESERVE) 00H (RESERVE) 00H (RESERVE) 00H (RESERVE) 00H (RESERVE) 00H (RESERVE) 00H (RESERVE) 00H (RESERVE) 00H (RESERVE) 00H (RESERVE) 00H (RESERVE) 00H (RESERVE) 00H
Set values
– 20 –
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