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MODEL MD-MT877C(S)
PORTABLE MINIDISC RECORDER -
Service Manual
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MD-MT877/MD-MT877C
SERVICE MANUAL
No. S3118MDMT877/
PORTABLE MINIDISC RECORDER
MD-MT877(S) MODEL MD-MT877C(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 SPECIFICATIONS ................................................................................................................................................................. 2 NAMES OF PARTS ............................................................................................................................................................... 3 OPERATION MANUAL .......................................................................................................................................................... 5 DISASSEMBLY .................................................................................................................................................................... 10 REMOVING AND REINSTALLING THE MAIN PARTS ....................................................................................................... 11 ADJUSTMENT ...................................................................................................................................................................... 12 NOTES ON SCHEMATIC DIAGRAM .................................................................................................................................. 28 TYPES OF TRANSISTOR AND DIODE .............................................................................................................................. 28 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 OF THE SET (MD-MT877(S) FOR U.S.A. 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-MT877/MD-MT877C
FOR A COMPLETE DESCRIPTION OF THE OPERATION OF THIS UNIT, PLEASE REFER TO THE OPERATION MANUAL.
SPECIFICATIONS
Rechargeable Nickel-Metal Hydride battery (AD-N55BT) x 1 AC adaptor (AC 120V, 60 Hz) Commercially available, "AA" size (LR6), alkaline battery x 1 Separately available car adaptor, AD-CA55X (for cars with a 12-24V DC negative ground electrical system) (Used with separately available plug adaptor (AD-M66PA)) Power consumption 7 W (AC adaptor) Output power RMS; 10 mW (5 mW + 5 mW) (0.2% T.H.D.) Charging time Approx. 3.5 hours Input sensitivity MIC H: reference input level 0.25 mV input impedance 10 k ohms MIC L: reference input level 2.5 mV input impedance 10 k ohms LINE: reference input level 100 mV input impedance 20 k ohms Output level Earphones: maximum output level 5 mW + 5 mW load impedance 32 ohms LINE: specified output 250 mV (-12 dB) load impedance 10 k ohms Dimensions Width: 2-27/32" (71.9 mm) Height: 11/16" (16.8 mm) Depth: 3-1/8" (78.7 mm) Weight 0.29 lbs. (131 g) with rechargeable battery Input jack Output jack Type Signal readout Audio channels Frequency response Rotation speed Error correction Coding Recording method Sampling frequency Wow and flutter Battery life Line/optical digital, microphone (powered by the main unit) Earphones (impedance: 32 ohms)/remote control unit Portable MiniDisc recorder Non-contact, 3-beam semiconductor laser pickup Stereo 2 channels/monaural (long-play mode) 1 channel 20 20,000 Hz (± 3 dB) Approx. 400 1,350 rpm ACIRC (Advanced Cross Interleave Reed-Solomon Code) ATRAC/ATRAC3 (Adaptive TRansform Acoustic Coding), 24-bit computed type Magnetic modulation overwrite method 44.1 kHz (32 kHz and 48 kHz signals are converted to 44.1 kHz, and then recorded.) Unmeasurable (less than ±0.001% W. peak) Stereo Continuous Continuous recording: play: Approx. Approx. 6.5 hours 12 hours Continuous Continuous recording: play: Approx. Approx. 6 hours 16 hours Continuous Continuous recording: play: Approx. Approx. 15 hours 29 hours 2 times long Continuous Continuous recording: play: Approx. Approx. 9 hours 13.5 hours Continuous Continuous recording: play: Approx. Approx. 10 hours 19.5 hours Continuous Continuous recording: play: Approx. Approx. 22 hours 33 hours 4 times long Continuous Continuous recording: play: Approx. Approx. 11.5 hours 15 hours Continuous Continuous recording: play: Approx. Approx. 13 hours 22 hours Continuous Continuous recording: play: Approx. Approx. 30 hours 40 hours Power source DC 1.2V: DC 5V: DC 1.5V: DC 1.5V:
When using the rechargeable battery (fully charged) included with the unit When using one, commercially available, high capacity, "AA" size (LR6), alkaline battery (The rechargeable battery is in the unit, discharged.) When using one, commercially available, high capacity, "AA" size (LR6), alkaline battery with the rechargeable battery (fully charged)
q The above values are the standard values when the unit is operated horizontally and charged at an ambient temperature of 77°F (25°C). (The operable duration with the rechargeable battery will be shorter when the unit is carried around.) q The volume level is set at "VOL 15". q The LED is set at "LIGHT OFF".
q Operable duration with a commercially available battery varies depending on its maker, type, and conditions of use. q "Fully charged" means that the charging is complete after approximately 3.5 hours since the remaining amount of the battery is reduced to " " (1 bar).
Specifications for this model are subject to change without prior notice
2
MD-MT877/MD-MT877C
NAMES OF PARTS
Main unit
1. Record/Track Mark Button 2. Mode Button 3. Volume/Cursor/Fast Forward/Fast Reverse/ Recording Level/Name Select Button 4. Stop/Power Off/Hold Button 5. Open Lever 6. Display/Character Select Button 7. Edit/Auto Mark/Time Mark Button 8. Play/Pause Button 9. Enter/Fast Play/Synchro Button 10. Bass/Delete Button 11. Rechargeable Battery Cover 12. Handstrap Holder 13. Optical/Line Input Jack 14. Microphone Input Jack 15. Remote Control/Earphones/Line Output Jack
1
2
3
4
8 9 10
5 6 7 11
15 12
Main unit display panel
1. Level Meter 02. Record Indicator 03. Synchro Recording Indicator 04. Operation Indicator 05. Long-play/Recording Mode Indicator 6. Character/Time Information Indicator 7. Repeat Indicator 8. Battery Indicator 9. Random Indicator 10. Track Number Indicator 11. TOC Indicator 12. Disc Name Indicator
13
14
7 8 9 10 11 12
1 2 3 4 5 6
Yellowgreen Blue Orange
3-color LED
Various modes are indicated with three colors of lights. Charging Lighting starting with yellow-green light. Refresh Extinguishing starting with orange light after all the lights are lit. Playback Flashing the color of the activated playback mode. Recording Flashing the color of the activated recording mode. Fast Forward Flashing starting with yellow-green light. Fast Reverse Flashing starting with orange light. Volume (+) Lighting starting with yellow-green light. Volume () Extinguishing instantly starting with orange light after all the lights are lit. TOC Reading: flashing at random.
3
MD-MT877/MD-MT877C
Remote control unit
1. 2. 3. 4. 5. 6. 7. 8. 9. Earphones Jack Fast Forward/Fast Reverse Button Display Button Play Mode Button Sound/Track Mark Button Stop/Power Off Button Play/Pause Button Volume Button Hold Switch
1
2
3
4
5
6
7
8
9
Remote control display panel
1. 02. 03. 04. 05. 06. 07. 08. 09. 10. Record Indicator Track Number Indicator Operation Indicator Character/Time Information Indicator Battery Indicator Random Indicator Synchro Recording Indicator Total Track Number Indicator Long-play/Recording Mode Indicator Repeat Indicator
1
2
3
4
5
6
7
8
9
10
Battery charger
1. 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 Jack
2
1
CHAR GE OPER ATIO N
3
4 5 6
4
MD-MT877/MD-MT877C
OPERATION MANUAL
Using with the Rechargeable Battery
Charging
Do not force the battery cover open too far.
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 2
AC 120V 60Hz
Insert the rechargeable battery. Move the Charge/Operation switch to charge mode. Place the portable MD into the battery charger and connect the AC adaptor.
3
q After the rechargeable battery is charged or used, it will
Charge mode
get slightly warm. This is normal.
q When the portable MD is turned on or operating, the bat-
tery will not be charged.
To the DC IN 5V jack
Checking Displays
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 low is very low
q When the battery is completely discharged, the battery
indicator will flash. Recharge the battery or replace the alkaline battery with a new one. q When the battery has run completely out, "BATT EMPTY (LoBATT)" will appear. Then, the power will be disconnected automatically. Notes: q If you use the battery which you stopped charging halfway, " " may appear. It does not mean that the battery is completely charged. q The battery indicator will not correctly display the remaining capacity for approximately 20 seconds after the power has been turned on. q When the AC adaptor or a separately available car adaptor is used, the battery indicator will not be shown. q The number of bars shown in the battery indicator may increase or decrease, depending on the operation being performed. This is normal.
5
MD-MT877/MD-MT877C
Error Messages
ERROR MESSAGES BATT EMPTY
(LoBATT)
MEANING
q The battery is run down. q Nothing is recorded. q You tried to record from a copy prohibited MiniDisc. q A track cannot be edited. q The disc data cannot be read because the disc is damaged.
REMEDY
q Charge the rechargeable battery or replace the alkaline battery (or use the AC adaptor for power). q Replace the disc with a recorded disc. q Record using the analog cable. (MD-MT877(S)) q Record using the analogue cable. (MD-MT877C(S)) q Change the stop position of the track and then edit it. q Reload the disc. q Replace it with another recorded disc.
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)
q Recording cannot be performed correctly due to vibration or shock. q Stamp function does not work. q Cannot save the TOC information correctly to a MiniDisc. (A large portion of the disc has been damaged.) q The Charge/Operation switch is not set to the operation mode when using this unit with the AC adaptor. q The disc is scratched. q The disc is out of recording space. q The microprocessor has reported a system fault and the unit is out of order. q The unit is in the hold mode. q You removed a MiniDisc while recording or editing.
q Re-record or replace it with another recordable disc. q Check the number of tracks. q Replace the disc with another recordable disc.
q Set the Charge/Operation switch to the operation mode.
DISC FULL Er-MD **
(ErMD*)
q q q q
HOLD
(HOLD)
If the sound you hear is not right, record again. Replace the disc with another recordable disc. Replace it with another recordable disc. To have it repaired, go to the distributor where you purchased the unit. q Return the HOLD switch to its original position. q Turn off the power and remove the MiniDisc.
LOCKED
(Can'tLOCK)
Error Messages : continued
ERROR MESSAGES NO DISC NO SIGNAL
(noSIG.)
MEANING
REMEDY
PLAY MD
(PLAYmd)
q A disc has not been loaded. q Load a disc. q Poor connection of the digital cable. q Connect the digital cable securely. q No output signal comes out from the connected q If the portable CD player has a function to prevent sound unit to playback. skips, deactivate it. q The input signal has improper sampling fre- q Playback with the connected unit. quency. q You recorded on a playback-only disc. q Replace it with a recordable disc. q The battery charger is defective. q The write protection tab of a MiniDisc is set to the protected position. q You tried to record on a playback-only disc. q Since a track number is currently being located or updated, the unit cannot accept your command. q The temperature is too high. q There is an error in the recording signal. q There is no space left for recording character information (track names, disc names, etc.). q The track has been protected from being erased. q A disc which contains data other than music was played. q There is an error in the signal recorded on the disc. q Stamping is not possible. q To have it repaired, go to the distributor where you purchased the unit. q Move the write protection tab back to its original position. q Replace it with a recordable MiniDisc. q Wait for a while and try the operation again.
POWER ? PROTECTED SORRY
(Sorry)
TEMP OVER
(TEMP!)
q Turn off the power, and wait for a while. q Erase all of the tracks, and then record again. q Replace it with another recordable disc. q Edit the track with the device on which it was recorded. q A disc which contains non-music data cannot be played. q Replace it with another recorded disc. q Retry.
TOC FORM **
(Tform**)
TOC FULL Tr. Protect ? DISC
(? DISC)
( ) : Error messages seen on the remote control. Number or symbol appears in * position.
6
MD-MT877/MD-MT877C
MiniDisc System Limitations
The unit may have the following symptoms while recording or editing. The unit is not out of order. SYMPTOM LIMITATIONS "DISC FULL" or "TOC FULL" appears More than 255 tracks (maximum) cannot be recorded regardless of the reeven though the MiniDisc still has re- cording time. cording time left. 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 remaining recording time does not The unit does not count non-recorded portions that last 12 or fewer seconds increase even though you erased tracks. to display the remaining recording time. The time may not increase even if you erase short tracks. The total of the recorded time and the One cluster (approximately 2 seconds) is the minimum unit for recording. remaining time does not match the maxi- For example, a 3-second track uses 2 clusters (approximately 4 seconds). mum recordable time. Therefore, the actual recordable time may be shorter than the displayed time. Combine function does not work. 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.
Sound skips in fast reverse/forward.
A track number is created in the middle A track number may be created if there are scratches or dust on the MiniDisc. of a track.
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 authorized SHARP dealer or service center. PROBLEM CAUSE PROBLEM CAUSE
The unit does not q Is the AC adaptor disconnected? turn on. q Is the battery exhausted? q Is the unit in the hold mode? q Has condensation formed inside the unit? q Is the unit being influenced by mechanical shock or by static electricity? No sound is q Is the volume set too low? heard from the q Is the remote control unit or the earearphones. phones plugged in? q Are you trying to play a MiniDisc with data on it instead of a MiniDisc containing music? When the opera- q Is the unit in the hold mode? tion buttons are q Is the battery exhausted? pressed, the unit q Is the remote control unit plug or the earphones plug inserted firmly? does not respond. Some sounds q Is the battery exhausted? q Is the unit being subjected to excesare skipped. sive vibration?
The MiniDisc can- q Has the track number or character not be ejected. information been updated on the disc yet? q Is the unit in the recording or editing mode? Recording and q Is the MiniDisc protected against editing are imaccidental erasure? possible. q Is the unit connected properly to the other equipment? q Is the AC adaptor unplugged or did a power failure occur while recording or editing? q Is the unit in the hold mode? q Is an optical signal being output from the stereo system? Read the operation manual for the stereo system. The battery cannot q Is the select switch for charging/ be charged. operation set on the charging side? q Is the jack clean? Nothing appears q Is the remote control display set to on the remote "LIGHT OFF"? control display.
7
MD-MT877/MD-MT877C
1
Insert a MiniDisc Inserte un minidisco
2 4 3
Insert according to the direction of the arrow.
2
Connect the AC adaptor Conecte el adaptador de CA
AC 120V, 60 Hz 120V CA, 60Hz
Insértelo de acuerdo con la dirección de la flecha.
1
RELEASE LOCK
1 Slide the OPEN lever to re- 3 Insert a MiniDisc as shown.
lease the compartment door. Deslice la palanca OPEN para abrir la puerta del compartimiento.
To an AC outlet A un tomacorriente de CA
Inserte un minidisco como se muestra.
To the DC IN 5V jack
A la toma DC IN 5V
Insert securely, all the way in.
4 Close the compartment.
Cierre el compartimiento.
Insértelo con seguridad a fondo.
2 Lift it up.
Levantelo.
1 Move the Charge/Operation
switch to Charge mode (RELEASE).
Mueva el selector de carga/ operación al modo de carga
3 Move the Charge/Operation
switch to Operation mode (LOCK).
Mueva el selector de carga/ operación al modo de operación (LOCK).
When you record on a MiniDisc, check that the erase prevention tab is set to the "recordable" position.
(RELEASE).
Recordable Para poder grabar
Recording prevented Para no poder grabar
Cuando desee grabar en un minidisco, compruebe que la lengüeta de protección contra borrado esté colocada en la posición para "poder grabar".
2 Insert the portable MD into
the battery charger.
Inserte el MD portátil en el cargador de baterías.
4 Plug the AC adaptor.
Enchufe el adaptador de CA.
Before using the unit with a rechargeable battery, the battery has to be charged. Refer to "Using with the rechargeable battery". Antes de emplear el aparato con una batería recargable, se deberá cargar la batería. Consulte el apartado de "Empleo con la batería recargable".
3
Connection Conexión
Red: To Right Rojo: A la derecha
Preparation for use Preparación para su utilización
The unit does not work if the · / HOLD button is set to HOLD. Este aparato no funciona si el botón · / HOLD está puesto en HOLD.
OPTICAL/ LINE IN
Press the · / HOLD button for 2 seconds or more. Pulse el botón · /HOLD durante 2 o más segundos.
White: To Left Blanco: A la izquierda
LINE OUT
Hold Retención
Released Liberación
To a stereo system with "LINE OUT" or "AUDIO OUT" jacks (See left. Analog connection)
Note: If the audio system has only one pair of jack then they are usually input only and recording via this connection is not possible.
RIGHT LEFT
A un sistema estéreo provisto de tomas de salida de línea "LINE OUT" o de salida de audio "AUDIO OUT" (Vea a la izquierda, Conexión analógica)
Nota: Si el sistema de audio sólo tiene un par de tomas, normalmente son sólo de entrada y no puede realizarse la grabación mediante esta conexión.
For operations Para operaciones
Operation mode
Modo de operación
Move it to operation mode when playing back or recording. Muévalo a la posición del modo de operación para la reproducción o grabación.
CAUTION: It is not recommendable to put the MiniDisc into a rear pocket, as this may damage the product when sitting.
PRECAUCIÓN: No se recomienda ponerse un minidisco en el bolsillo trasero del pantalón, porque podría dañarlo al sentarse.
8
MD-MT877/MD-MT877C
Recording Grabación
Check that the unit is connected to the stereo system. Compruebe que el aparato esté conectado al sistema estéreo.
4 Press the PAUSE button on the stereo system to enter the playback pause mode at the point you wish to start recording.
Pulse el botón PAUSE del sistema estéreo para entrar en el modo de pausa de reproducción en el punto en el que desee iniciar la grabación.
5 Press the MODE button repeatedly to select the recording mode.
Pulse repetidamente el botón MODE para seleccionar el modo de grabación.
6 Press the
Pulse el botón
button to start recording.
para iniciar la grabación.
7 Begin playback on the stereo system, the output will be recorded.
Inicie la reproducción del sistema estéreo, y se grabará la salida.
1 Press the REC button.
Pulse el botón REC.
To stop recording Press the · / :OFF button.
When recording stops, "TOC" appears (Table Of Contents). While "TOC" appears, the MiniDisc recorded contents have not yet been updated.
2 Begin playback on the stereo system connected to this unit.
Inicie la reproducción en el sistema estéreo conectado a este aparato.
To update the recorded contents of the MiniDisc Press the · / :OFF button while in the stop mode.
The power turns off after recorded contents have been updated on the MiniDisc.
3 Press the
or
button to adjust the recording level.
Para detener la grabación Pulse el botón · /:OFF.
Cuando se detenga la grabación, aparecerá "TOC" (índice). Mientras aparece "TOC", aún no se habrá actualizado el contenido grabado en el MD.
Adjust the recording level so that the maximum sound volume from the source makes the reading swing somewhere between 4 dB and 0 dB.
Pulse el botón o para ajustar el nivel de grabación. Ajuste el nivel de grabación para que el volumen de sonido máximo de la fuente produzca una indicación de entre 4 dB y 0 dB.
Para actualizar el contenido grabado del MD Pulse el botón · /:OFF en el modo de parada.
La alimentación se desconectará después de haber actualizado el contenido grabado en el MD.
Level meter indicator
Indicador del medidor de nivel
TOC display Visualización TOC
0dB 4dB
Playing Reproducción
1 Insert the earphones plug firmly into the earphones jack on
the remote control unit.
Inserte firmemente la clavija de los auriculares en la toma de auriculares del controlador remoto.
2 Plug the remote control into the 3 Insert unMiniDisc. a Inserte MD 4 Press the
button.
. Pulse el botón
jack on the unit.
del aparato.
Enchufe el controlador remoto a la toma
To stop playback Press the · / :OFF button (Remote control: press the button).
If the unit is not operated for at least 2 minutes while in the stop mode, the power will shut off automatically.
Para detener la reproducción Pulse el botón · /:OFF. (Controlador remoto: pulse el botón .)
Si el aparato no se utiliza durante un mínimo de 2 minutos en el modo de parada, la alimentación se desconectará automáticamente.
9
MD-MT877/MD-MT877C
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.
(B1) x 2 ø 1.4 x 2 mm Top Cabinet
(A1) x 2 ø 1.4 x 2 mm
(A1) x 1 ø 1.4 x 2 mm
OO P
PE E
N N
Bottom Cabinet EJECT Knob (A1) x 1 ø 1.4 x 2 mm
(B1) x 2 ø 1.4 x 2 mm
OP EN
(A1) x 1 ø 1.4 x 2 mm
STEP 1 2
REMOVAL Bottom Cabinet Top Cabinet
PROCEDURE 1. Screw ..................... (A1) x5 1. Open the Top cabinet. 2. Screw ..................... (B1) x4 3. Flexible PWB .......... (B2) x1 1. Open the rechargeable battery compartment of the direction indicated by arrows. 2. Screw .................... (C1) x1 3. Flexible PWB ......... (C2) x2 1. Pull the main frame to the A direction and remove the MD mechanism upward. 2. Screw .................... (D1) x1 1. Screw ...................... (E1) x6 2. Hook ....................... (E2) x4
FIGURE 10-1 10-1 10-2 10-2
Battery Cover
Figure 10-1
(C2) x 1(1*) Main PWB pull (C1) x 1 ø 1.4 x 2.5 mm
3
Main PWB
(B2) x 1 (C2) x 1
4
MD Mechanism
10-3
2 1
pull
5
LCD PWB
10-4
OP EN
(E1) x 6 ø 1.4 x 2 mm
Main Frame 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.
Figure 10-2
MD Mechanism
(E2) x 4
LCD PWB
OP
EN
A Main Frame (D1) x 1 ø 1.4 x 1.5 mm
Top Cabinet
Figure 10-3 Figure 10-4
10
MD-MT877/MD-MT877C
REMOVING AND REINSTALLING THE MAIN PARTS
Remove the mechanism according to the disassembling methods 1 to 4. (See Page 10.)
How to remove the spindle motor (See Fig. 11-1.)
1. Remove the solder joints (A1) x 4 of flexible PWB. 2. Remove the screws (A2) x 3 pcs., and remove the spindle motor.
(A2) x 3 ø 1.4 x 3 mm Spindle Motor
How to remove the lift motor (See Fig. 11-2.)
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.)
Solder joints (A1) x 4
How to remove the sled motor (See Fig. 11-3.)
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.)
MD Mechanism
Figure 11-1
(B2) x 1 ø 1.4 x 3.8 mm Lift Motor
How to remove the magnetic head (See Fig. 11-4.)
1. Remove the screws (D1) x 2 pcs. of the magnetic head and the optical pickup, and remove the solder joints (D2) 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. 11-4.)
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) x 1 ø 1.4 x 1.8 mm Grip Spring Drive Screw (D1) x 2 ø1.4 x 1.8 mm (D2)x2 Solder Joints (E2) x 1 ø 1.7 x 3.5 mm Optical Pickup
Solder Joints (B1) x 2 MD Mechanism
Figure 11-2
(C3) x 2 ø 1.4 x 1.2 mm Sled Motor (C1) x 1 (C2) x 1 (C4) x 3 Solder Joints
Magnetic head
Thrust Spring
MD Mechanism
Figure 11-3
MD Mechanism
Figure 11-4 11
MD-MT877/MD-MT877C Test disc
ADJUSTMENT
MD adjustment needs two types of disc, namely recording disc (low reflection disc) and playback-only disc (high reflection disc).
Type Test disc Parts No. 1 High reflection disc MMD-110 88GMMD-110 (TEAC Test MD) 2 Low reflection disc MMD-213A 88GMMD-213A (TEAC Test MD) 3 Low reflection disc Recording minidisc disc UDSKM0001AFZZ
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 close the disc lid 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 "VOLUME" button. (4) Normal mode setting initialization (BASS setting, VOLUME setting, etc.) (5) Test Mode STOP [ T E S T _ ] (6) Press "VOLUME+" to check the microcomputer version. (7) Press "VOLUME" 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 rechargeable battery. Do not close the compartment. (2) Close the battery lid twice in succession while pressing the VOLUME button and the PLAY button on the main unit at the same time. (Turn on and off the power twice) (3) Make sure the display changes from [INIT] to [BYE OK].
Test Mode
1. AUTO 1 Mode · Perform preliminary automatic adjustment. · 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 100 steps 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 · 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. · Error information is initialized · 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. · 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.
2. AUTO 2 Mode
3. TEST-PLAY Mode
7. ERROR INFORMATION Mode 8. NORMAL Mode
9. EEPROM Mode
4. TEST-REC Mode
5. MANUAL 1 Mode
12
MD-MT877/MD-MT877C 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.
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. 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. · Each time the MODE button is pressed while the TEST-PLAY mode target address is displayed, the digit which is changed by pressing the FAST FORWARD/REVERSE button is changed as follows. 0032 -- 0032 -- 0032 -- 0032 -- · When the FAST FORWARD 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 FAST REVERSE 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 FAST FORWARD/REVERSE 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. 1 -- 10 -- 100 step -- 1 * After the number of jump lines is indicated for one second, the address indication is restored. [ T R ] or [ 100 stp ] · When the FAST FORWARD button is pressed in the continuous playback mode, the specified number of lines is jumped in the FWD direction. · When the FAST REVERSE button is pressed in the continuous playback mode, the specified number of lines is jumped in the REV direction. * When the FAST FORWARD/REVERSE 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) | Continuous playback (C1 error indication) | Continuous playback (SUBQ address indication) * Recordabl disk Continuous playback (ADIP address indication) | Continuous playback (C1 error indication) | Continuous playback (ADIP error indication) | Continuous playback (ADIP address indication)
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 VOLUME+ button is pressed during adjustment, the setting increases, and the new setting is output. · When the VOLUME button is pressed during adjustment, the setting decreases and the new setting is output. · If the VOLUME+/ 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 VOLUME+ button is pressed during adjustment, the setting increases, and the new setting is output. · When the VOLUME button is pressed during adjustment, the setting decreases and the new setting is output. · If the VOLUME+/ 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".
[ S Q [ C E [ S Q
] ] ]
[ A P [ C E [ A E [ A P
] ] ] ]
13
MD-MT877/MD-MT877C
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.
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) : Address (Sector 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.
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 FAST FORWARD/REVERSE button changes as follows.
0032 -- 0032 -- 0032 -- 0032 --
· When the FAST FORWARD button is pressed in the TEST-REC mode target address is displayed, the digit of address specified by the MODE button is set to +1h.(0 to F) · When the FAST REVERSE button is pressed in the TEST-REC mode target address is displayed, the digit of address specified by the MODE button is set to -1h. (0 to F) * When the FAST FORWARD/REVERSE button is held down, the setting changes continuously, one cycle being 100 ms. · When the VOLUME+/ 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 ad] dress indication is restored. [ R P W _ · : Address · : Laser power cord · Operation is disabled if the premastered disc or disc is in miseraseprotected state.
8. Error data display Mode
· Reversing when FAST REVERSE 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 72h : EEPROM data read check sum error 73h : Record head drive disabled (by EJECT lever) 91h : Ambient temperature is higher that the allowable temperature
Error messages
Can't READ The details ' ' 'f': Focus 'a': Servo adjustment 's': Track such 'r': TOC information reading 'u': UTOC information reading 'w': At the time of data writing 'p': Spindle start Er-MD The details ' ' '41': UTOC light test error '80': EEPROM information reading error
14
MD-MT877/MD-MT877C 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 page 12 "Entering the TEST mode".) (4) Version display (At the time of settlement of the test mode by the button operation.) [Ver. ] 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 "FAST REVERSE" 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 VOLUME+ or VOLUME button. (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. · Button operation in order of BASS, FAST REVERSE x 1 time, PLAY, PLAY in the test mode STOP state. · 'TM$$%%' is displayed. ($$= Temperature code, %% = Temperature reference) (3) Once press FAST FORWARD, 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 Ambient temperature + 8oC ~ +10oC +11oC ~ +13oC +14oC ~ +16oC +17oC ~ +19oC +20oC ~ +22oC +23oC ~ +25oC +26oC ~ +28oC +29 C ~ +30 C +31 C ~ +33 C
o o o o
Temperature correction - 05h - 04h - 03h - 02h - 01h ± 00h + 01h + 02h + 03h
Center temperature + 9.1oC + 12.0oC + 14.9oC + 17.8oC + 20.7oC + 23.6oC + 26.9oC + 29.4oC + 32.3oC
[3] Temperature code identification Check that the temperature code indicated after the servo control corresponds to the temperature limits below Ambient temperature - 9oC ~ +10oC + 3oC ~ +21oC +15 C ~ +33 C +26 C ~ +43 C
o o o o
Temperature correction 08h 07h 06h 05h
Center temperature + 0.5oC + 12.0oC + 23.6oC + 35.0oC
15
MD-MT877/MD-MT877C EEPROM DATA LIST (EEPROM version C)
Fucus setting
Item display FG1 _ FG2 _ FF0 _ FF1 _ FF2 _ Ff0 Ff1 _ _ Set values 44H 70H 10H 70H E8H 10H 48H EAH EDH 09H 06H 0FH 28H 18H 40H 38H 66H 84H 50H 58H 58H
Spindle setting
Item display SPG _ SPi _ SPm _ SPo _ PGM _ SP1 _ SP2 _ SP3 _ SP4 _ SP5 _ Sp2 _ Sp5 _ SD1 _ SD2 _ SPK _ MPG _ SPL _ SPW _ SPB _ SRi _ SRm _ SRo _ Set values 14H 2AH 10H 70H E0H 10H 40H E4H 00H 20H 12H 20H 0DH 67H 34H 00H 3AH 48H 24H 30H 0EH 65H 02H 02H 00H F4H 20H 16 Set values 30H 9AH 62H 4FH E0H 10H 60H F2H F2H 10H 60H 10H 7FH 7FH EBH 28H 60H 0FH 66H C0H 9AH 7BH
Ff2 _ FZH _ FLn _ FLp _ DJG _ FSS _ FTS _ FSB _ FTB _ FGM _ TVG _ TO1 _ TO5 _ TOR _
Tracking setting
Item display TG1 _ TG2 _ TF0 _ TF1 _ TF2 _ Tf0 _ Tf1 Tf2 _ _
Sled setting
Item display SKS _ SKL _ SLC _ STL _ STM _ STE _ SDV _ SJP _ WTm _ SRV _ SLT _ MVS _ SLS _ SKE _ SDE _ Set values 7FH 7FH 24H 07H 42H A6H 60H 03H 18H 54H 5CH 0AH 28H 0EH 1CH
TFS _ TBo _ TBt _ TKo _ TKt _ TDo _ TDt _ SCo _ SCt _ SCm _ CLp _ CLr _ JPI _ K10 _ THP _ THG _ TOP _ TOG _ T1P _
MD-MT877/MD-MT877C
BASS setting
Item display B1A _ B1B _ B1C _ B2A _ B2B _ B2C _ B3A _ B3B _ B3C _ Set values 3FH 00H 00H 1FH 00H 00H E2H 00H 00H
Control setting
Item display CT0 _ CT1 _ CT2 _ CT3 _ CT4 _ CT5 _ CT6 _ RC0 _ RC1 _ SYC _ PWL _ Set values 28H C0H 3EH 40H
H
Set values 02H 01H 30H 20H D0H 4BH 18H C0H FEH A6H 54H 24H 22H 17H 11H 00H 64H A6H 94H A0H C0H 1FH 50H 5AH 00H D0H 66H FCH 00H 80H 20H BFH 02H 16H 00H 00H 81H 80H 00H 80H 00H 00H 00H
ADJ.SET setting
Item display COK _ FAT _ TAT _ CAT _ FAB _
DR1 _ DR2 _ IN1 _ IN2 _ INH _ DRH _ PLE _ RCE _
Digital EQ setting
Item display HQ1 _ HQ2 _ HSG _ HSO _ LQ1 _ LQ2 _ LSG _ LSO _ GQ1 _ GQ2 _ GSG _ EQP _ Set values 90H 90H 11H FDH 90H 90H 11H 00H 98H 84H 11H 00H
ELT _ X2T _ SDF _ CHV _ DRS _ DUP _ RFL _ CG1 _ FB0 _ RST _ R20 _ R21 _ R40 _ R41 _ FBL _ MC2 _ MC4 _ L2H _ L4H _ SPM _ MSL _ US0 _ US1 _ US2 _
17
MD-MT877/MD-MT877C
Do the following when replacing the mechanism, the pickup, the EEPROM (IC402), the LSI(IC201) or the main PWB unit.
Enter the test mode, move the pickup to the most internal periphery and execute AUTO1. (Use the disc of MMD-213A.)
AUTO1
PLAY
AT1
Normality completion
(During the spare style automatic adjustment)
ADJ.OK
PLAY
AT2
Normality completion
(During the adjustment that ATT is automatic)
ADJ.OK
Remote controller P-MODE button (During the focus balance adjustment)
The indication of RAMDOM
STOP is pushed (Adjustment completion)
The indication of "TEST" AUTO2 It is made to carry it out
PLAY Move the pickup to the most internal periphery and press the BASS button (Fast Forward Button)
ADJ.OK
PLAY
AP####
STOP is pushed
(Continuance is regenerating) It confirms that an address proceeds
BYE
OK
Indication disappears All the supply of the power supply is turned off
(In such cases as the battery) If you replaced EEPROM, set the EEPROM valume to the final version.
Test Mode Start · Completion methool
· Starting method of the test mode When the unit is in the stand-by state (with no display), the test mode is started by performing the following operation using the remote control. Press the [PLAY] button while pressing the [PLAY-MODE] button, and release the [PLAY-MODE] button while keeping the [PLAY] button pressed, and press the [VOLUME] button. Indication after the start :
TEST
: To the test mode stop ([Test mode menu]) Performance mode Playback volume LINE REC volume Microphone REC volume Resume setting : Version indication 2 seconds EEPROM version Destination =Normal =28 =30 =20 =Cancellation
Volume+
Volume -
Program version : LCD all the lighting two seconds
All the lighting TEST
STOP
· How to cancel the test mode : Test mode stop
BYE BYE OK
: [OK] or [NG] Check the microcomputer RAM and EEPROM with the contents of the preliminary adjustment.
Pickup position initialisation EEPROM contents renewal
POWER OFF
18
MD-MT877/MD-MT877C
Change of Tset Mode Menus TEST
SKIP UP BASS SKIP DOWN : Test mode stop
Slide external periphery move
Slide internal periphery move
SKIP DOWN
AUTO1
: Pre-automatic adjustment menu SKIP UP SKIP DOWN : ATT auto adjustment menu SKIP DOWN
AUTO2
SKIP UP
T
SKIP UP
PLAY
SKIP DOWN
: Continuous playback menu
T
SKIP UP
REC
SKIP DOWN
: Continuous record menu
MANU1
SKIP UP SKIP DOWN
: Pre-manual adjustment menu : ATT manual adjustment menu SKIP DOWN : Pre-adjustment value check menu SKIP DOWN : ATT adjustment value check menu SKIP DOWN : Digital input signal monitor menu SKIP DOWN
MANU2
SKIP UP
RSLT1
SKIP UP
RSLT2
SKIP UP
DinMon
SKIP UP
E
SKIP UP
DATA
SKIP DOWN
: Error history display menu
NORMAL
SKIP UP SKIP DOWN
: Test mode normal play menu
EEPROM
SKIP UP
: EEPROM setting menu
* When the [STOP] button is pressed in specific menu, the "TEST MODE STOP" state is set. * When the [VOLUME+] button is pressed in the "TEST MODE STOP" state, the program version is displayed for 2 seconds * When the [VOLUME] button is pressed in the "TEST MODE STOP" state, all the displays appear for 2 seconds.
Servo Preautomatic Adjustment AUTO1
PLAY : Preautomatic adjustment menu Adjustment error : During preautomatic adjustment Adjustment error Normal end
AT1 ADJ. NG
: Preadjustment error (adjustment value output) : Preadjustment normal end (adjustment value output)
ADJ. OK
PLAY
AT2
: During ATT automatic adjustment
* When the [STOP] button is pressed in specific menu, the "TEST MODE STOP" state is set. * Move the pickup lens manually to the innermost periphery before performing the servo preliminary auto adjustment. (Refer to "Change of test mode menus" for the operation method.) *" " is the internal processing number, the meanings of the numbers are as follows. 0 0 : Initial setting 0 2 : ABEF input offset measurement 0 4 : AB input (ABMAXO) level setting 0 5 : Focus ATT tentative setting 0 6 : Pit section EF input level setting 0 7 : COUT level setting for pit section adjustment 0 8 : Sled external periphery move 0 9 : Groove section EF input level setting 1 0 : COUT level setting for groove section adjustment 1 1 : TCRS input level setting 1 2 : Tracking ATT initial setting 1 3 : AB input (LPFABO) level setting 1 4 : Focus ATT initial setting 1 6 : TCRS input offset measurement * It is necessary for each test mode where servo operation is made to complete the preliminary adjustment. (Otherwise, "ErADJ." appears.) * The preliminary adjustment complete state is stored on the EEPROM (protected field).
19
MD-MT877/MD-MT877C
Servo ATT Auto Adjustment AUTO2
PLAY : ATT auto adjustment menu
AT2
Adjustment error Normal end
: During ATT auto adjustment
ADJ. NG
: ATT adjustment error (adjustment value output)
ADJ. OK
PLAY
: ATT adjustment error (adjustment value output)
SQ#### AP####
: Continuous playback (high reflection) : Continuous playback (low reflection)
* When the [STOP] button is pressed in specific menu, the "TEST MODE STOP" state is set. * Move the pickup lens manually to the innermost periphery before performing the servo ATT auto adjustment. (Refer to "Change of test mode menus" for the operation method.) *" " represent the adjustment number as follows. 0 0 : Initial setting 0 3 : Pit section tracking ATT setting 0 4 : Pit section focus ATT setting 0 6 : Sled external periphery move (low reflection only) 0 7 : TCRS ATT setting (low reflection only) 0 8 : Groove section tracking ATT setting (low reflection only) 0 9 : Groove section focus ATT setting (low reflection only)
Continuous Playback
· Continuous playback from current pickup position
T
PLAY
PLAY
NO
: Continuous playback menu
AUTO1 Practice finish?
YES
ErADJ
AUTO2 Practice No error?
NO
AUTO2 Practice finish?
YES
NO
YES
SQ#### AP####
· Continuous playback from any address
A D J. N G
SQ : Continuous playback (pit section) AP : Continuous playback (groove section) # # # # : Address
T
DISP
PLAY
: Continuous playback menu
Ad 0 0 3 2
PLAY
: Start address setting
SQ#### AP####
: Continuous playback (pit section) : Continuous playback (groove section) # # # # : Address
* When the [STOP] button is pressed in specific menu, the "TEST MODE STOP" state is set. * In the start address set state the start address changes as follows when the [DISP] button is pressed. 0 0 3 2 H (initial value) 03C0H 0700H 08A0H
DISP DISP DISP
Ad0 0 3 2
Ad0 3 C 0
0950H
Ad0 7 0 0
DISP
Ad0 8 A 0
Ad0950
MODE MODE
* In the start address setting state the start address change digit changes when the [P-MODE] button is pressed. 1st digit (initial value) 2nd digit 3rd digit
Ad0 0 5 0
Ad0 0 50
Ad0 0 50
MODE
* In the start address set state the value of selection digit changes in the range of "0h to Fh" when the [FAST FORWARD/REVERSE] button is pressed * If the [P-MODE] button is pressed in the continuous playback state, the mode is changed to the B-ATT setting state of the ATT manual adjustment. : Continuous playback (pit section) SQ#### : Continuous playback (groove section) # # # # : Address AP#### P-MODE
HB LB
: High-reflection pit section B-ATT (focus) setting : Low-reflection groove section B-ATT (focus) setting : ATT setting
20
MD-MT877/MD-MT877C
* In the continuous playback state the number of jump lines changes as follows shown the [BASS] button is pressed. 1 (initial value) 10
1TR
BASS
10TR
BASS
100stp
BASS
100s tep
* When the [FAST FORWARD] button is pressed in the continued playback mode, jump of specified number of lines occurs in the external periphery direction. If the key is held down jump occurs continuously (100 ms cycle). * When the [FAST REVERSE] button is pressed in the continuous playback mode, jump of specified number of lines occurs in the internal periphery direction. If the key is held down, jump occurs continuously (100 ms cycle). · Focus balance Adjustment mode
T-PLAY Each indication
PLAY
: Continuous playback menu
b###
DISP
Others indication
: Focus balance Adjustment mode : Focus balance # # # : Jitter error
* The focus balance adjustment mode is available only for low reflection discs. * The RANDOM marker lights up in the focus balance adjustment mode. * The focus balance ( ) can be changed by the VOL UP/DOWN button operation. * If the PLAY button is pressed in the focus balance adjustment mode, the unit returns to the continuous playback mode.
Continuous Record
Enter the EEPROM setting mode, and press the FAST FORWARD button. Change the MSL setting value from 00 to 08 by using CTRL_ (control setting menu). (If the MSL remains in 00, no signal is recorded.) · Continuous record from the current pickup position
T
PLAY
REC
NO
: Continuous record menu
AUTO1 Practice finish?
YES
ErADJ
AUTO2 Practice No error?
NO
AUTO2 Practice finish?
YES
NO
YES
AP#### T REC
DISP
A D J. N G
: Continuous record # # # #: Address
· Continuous record playback from any address : Continuous record menu
Ad 0 0 3 2
PLAY
: Start address setting
AP# # # #
: Continuous record # # # #: Address
* When the [STOP] button is pressed in specific condition, the "TEST MODE STOP" state is set. * In the start address set state the start address changes as follows when the [DISP] button is pressed. 0 0 3 2 H (initial value) 03C0H 0700H 08A0H DISP DISP DISP
Ad0 0 3 2
Ad0 3 C 0
Ad0 7 0 0
DISP
Ad0 8 A 0
0950H
Ad0950
* In the start address setting state the start address change digit changes when the [P-MODE] button is pressed. 1st digit (initial value) 2nd digit 3rd digit MODE MODE
Ad0 0 50
Ad0 0 5 0
Ad0 0 5 0
MODE * In the start address set state the value of selection digit changes in the range of 0h to Fh when the [FAST FORWARD/REVERSE] button is pressed. * In the continuous record state and start address set state the record laser power changes in the range of "0h to Fh" when the [VOLUME +/] button is pressed. (Initial value 0DH)
21
MD-MT877/MD-MT877C
Servo Pre-Manual Adjustment MANU1
PLAY : Pre-Manual Adjustment menu : Temperature code indication $ $ : Temperature code : A signal offset (AINO) measurement : Measurement value SKIP DOWN : B signal offset (BINO) measurement : Measurement value SKIP DOWN : E signal offset (EINO) measurement : Measurement value SKIP DOWN : F signal offset (FINO) measurement : Measurement value : Laser ON (play power) : AB signal level measurement (ABMAXO) : Measurement value SKIP DOWN : A-ATT (focus) tentative setting : ATT setting : B-ATT (focus) tentative setting : ATT setting SKIP DOWN : Pit section EF signal level measurement (LPFEFO) : Measurement value : Pit section adjustment COUT level setting : COUT level setting SKIP DOWN : Groove section EF signal level measurement (LPFEFO) : Measurement value SKIP DOWN : Groove section adjustment COUT level setting : COUT level setting SKIP DOWN : TCRS signal level measurement (TCRSMIO) : Measurement value SKIP DOWN : E-ATT (tracking) initial setting : ATT setting SKIP DOWN : F-ATT (tracking) initial setting : ATT setting SKIP DOWN : AB input level measurement (LPFABO) : Measurement value SKIP DOWN : A-ATT (focus) initial setting : ATT setting SKIP DOWN : B-ATT (focus) initial setting : ATT setting : TCRS signal offset (TCRSO) measurement : Measurement value
TMP
SKIP UP
$ $
SKIP DOWN
Ah
SKIP UP
Bh
SKIP UP
Eh
SKIP UP
Fh
SKIP UP SKIP DOWN
LON
SKIP UP
P
SKIP DOWN
AB
SKIP UP
Sa
SKIP UP SKIP DOWN
Sb
SKIP UP
ef
SKIP UP SKIP DOWN
PCH
SKIP UP
ef
SKIP UP
GCH
SKIP UP
TC
SKIP UP
SE
SKIP UP
SF
SKIP UP
ab
SKIP UP
SA
SKIP UP
SB
SKIP UP SKIP DOWN
TH
* When the [STOP] button is pressed in specific condition, the "TEST MODE STOP" state is set. * If the [BASS] button is pressed in the laser ON state (with no disc or the lid open), laser power changes as follows. Play back Record power Maximum power BASS BASS 1 (initial value) 10 384
LON
P
LON
R
LON
BASS
M
* In the specific setting display state the setting change digit changes when the [P-MODE] button is pressed. · In the case of the setup value two digits. 1st digit (initial value) 2nd digit
P-MODE P-MODE
· In the case of the setup value three digits. 1st digit (initial value) 2nd digit
P-MODE P-MODE
3nd digit
P-MODE
* In the specific state the setting changes in the range of "0h to Fh" when the [VOLUME +/] button is pressed. * If the [DISP] button is pressed, the display changes as follows.
22
MD-MT877/MD-MT877C
· ABMAXO measurement value
Sa Sb
DISP DISP
: A-ATT (focus) tentative setting : B-ATT (focus) tentative setting : ABMAXO measurement value indication "1" Mark lighting
AB
· LPFABO measurement value
SA SB
DISP DISP
: A-ATT (focus) tentative setting : B-ATT (focus) tentative setting : LPFABO measurement value indication "1" Mark lighting
ab
· LPFEFO measurement value
PCH GCH
DISP DISP
: Pit section adjustment COUT level setting : Group section adjustment COUT level setting
ef
· LPFEINO/EFMIO measurement value
: LPFEFO measurement value indication "1" Mark lighting : E-ATT (tracking) initial setting : LPFEINO measurement value indication "1" Mark lighting DISP : EFMIO measurement value indication "REPEAT", "1" Mark lighting : F-ATT (tracking) initial setting : LPFFINO measurement value indication "1" Mark lighting DISP : EFMIO measurement value indication "REPEAT", "1" Mark lighting
SE
DISP
e i
DISP
EF SF
DISP
· LPFFINO/EFMIO measurement value
f i
DISP
EF
Servo ATT Manual Adjustment MANU2
PLAY : ATT manual adjustment menu : Temperature code indication $ $ : Temperature code : Laser ON (play power) : Pit section E-ATT (tracking) setting : ATT setting SKIP DOWN : Pit section F-ATT (tracking) setting : ATT setting SKIP DOWN : High reflection A-ATT (focus) setting : Low reflection A-ATT (focus) setting : ATT setting SKIP DOWN : High reflection B-ATT (focus) setting : Low reflection B-ATT (focus) setting : ATT setting SKIP DOWN : TCRS ATT setting : ATT setting :Groove section E-ATT (tracking) setting : ATT setting SKIP DOWN :Groove section F-ATT (tracking) setting : ATT setting SKIP DOWN : Low reflection A-ATT (focus) setting : ATT setting SKIP DOWN
TMP
SKIP UP
$ $
SKIP DOWN
LON
SKIP UP
P
SKIP DOWN
PE
SKIP UP
PF
SKIP UP
HA La
SKIP UP
HB Lb
SKIP UP
GC
SKIP UP SKIP DOWN
GE
SKIP UP
GF
SKIP UP
LA
SKIP UP
: Low reflection B-ATT (focus) setting : ATT setting * When the [STOP] button is pressed in specific condition, the "TEST MODE STOP" state is set. * If the [PLAY] button is pressed in the B-ATT setting state, the mode is changed to the continuous playback mode. And if the [P-MODE] button is pressed in the continuous playback state, the mode is changed to the B-ATT setting state of the ATT manual adjustment.
LB
23
MD-MT877/MD-MT877C
g j : High-reflection pit section B-ATT (focus) setting : Low-reflection pit section B-ATT (focus) setting : Low-reflection groove section B-ATT (focus) setting : ATT setting P-MODE : Continuous playback (pit section) : Continuous playback (groove section) # # # # : Address
HB Lb LB
PLAY
SQ#### AP####
* If the [BASS] button is pressed in the laser ON state (with no disc or the lid open), laser power changes as follows. Playback power Record power Maximum power
BASS BASS
LON
P
LON
R
LON
BASS
M
* In the specific setting display state the setting change digit changes when the [P-MODE] button is pressed. 1st digit (initial value) 2nd digit 3rd digit
P-MODE P-MODE
MODE * In the specific state the setting changes in the range of "0h to Fh" when the [VOLUME +/-] button is pressed. * If the [DISP] button is pressed, the display changes as follows. · LPFABO measurement value
HA HB La Lb LA LB
DISP DISP
: High-reflection pit section A-ATT (focus) setting : High-reflection pit section B-ATT (focus) setting : Low-reflection pit section A-ATT (focus) setting : Low-reflection pit section B-ATT (focus) setting : Low-reflection groove section A-ATT (focus) setting : Low-reflection groove section B-ATT (focus) setting
ab
· TCRSMIO measurement value
: LPFABO measurement value indication "1" Mark lighting
GC
DISP DISP
: TCRS ATT setting
TC
· LPFEINO/EFMIO measurement value
: TCRSMIO measurement value indication "1" Mark lighting : Pit section E-ATT (tracking) setting : Groove section E-ATT (tracking) setting
PE GE
DISP
e i
DISP
: LPFEINO measurement value indication "1" Mark lighting DISP : EFMIO measurement value indication "REPEAT", "1" Mark lighting : Pit section F-ATT (tracking) setting : Groove section F-ATT (tracking) setting
EF PF GF
DISP
· LPFFINO/EFMIO measurement value
f i
DISP
: LPFFINO measurement value indication "1" Mark lighting DISP : EFMIO measurement value indication "REPEAT", "1" Mark lighting
EF
24
MD-MT877/MD-MT877C
Servo Pre-adjustment Value Check RSLT1
PLAY : Pre-adjustment Value Check menu
AH
SKIP UP SKIP DOWN
: A signal offset measurement value (setting)
BH
SKIP UP SKIP DOWN
: B signal offset measurement value (setting)
EH
SKIP UP SKIP DOWN
: E signal offset measurement value (setting)
FH
SKIP UP SKIP DOWN
: F signal offset measurement value (setting)
TH
SKIP UP SKIP DOWN
: TCRS signal offset measurement value
ef
SKIP UP SKIP DOWN
: EF signal measurement value
TC
SKIP UP SKIP DOWN
: TCRS signal measurement value
ab
SKIP UP SKIP DOWN
: AB signal input measurement value : Pit section adjustment COUT level setting SKIP DOWN : Groove section adjustment COUT level setting SKIP DOWN : A-ATT (focus) initial setting SKIP DOWN : B-ATT (focus) initial setting SKIP DOWN : E-ATT (tracking) initial setting SKIP DOWN : F-ATT (tracking) initial setting
PCH
SKIP UP
GCH
SKIP UP
SA
SKIP UP
SB
SKIP UP
SE
SKIP UP
SF
* When the [STOP] button is pressed in specific menu, the "TEST MODE STOP" state is set. * In the specific setting display state the setting change digit changes when the [P-MODE] button is pressed. · In the case of the setup value two digits. 1st digit (initial value) 2nd digit
P-MODE P-MODE
· In the case of the setup value three digits. 1st digit (initial value) 2nd digit
P-MODE P-MODE
3nd digit
P-MODE
* In the specific state the setting changes in the range of "0h to Fh" when the [VOLUME +/] button is pressed.
25
MD-MT877/MD-MT877C
Error History Display
· Error history clear
E
DISP
DATA
: Error history indication menu
After one second : Error history clear
CLEAR
· Error history indication
E
DATA
: Error history indication menu : Error history 0 indication $ $ : Error code
PLAY
E0$$
SKIP UP SKIP DOWN
E1$$
SKIP UP SKIP DOWN
: Error history 1 indication $ $ : Error code : Error history 2 indication $ $ : Error code : Error history 3 indication $ $ : Error code : Error history 4 indication $ $ : Error code SKIP DOWN : Error history 5 indication $ $ : Error code SKIP DOWN : Error history 6 indication $ $ : Error code : Error history 7 indication $ $ : Error code SKIP DOWN : Error history 8 indication $ $ : Error code : Error history 9 indication $ $ : Error code SKIP DOWN : Total recording time
E2$$
SKIP UP SKIP DOWN
E3$$
SKIP UP SKIP DOWN
E4$$
SKIP UP
E5$$
SKIP UP
E6$$
SKIP UP SKIP DOWN
E7$$
SKIP UP
E8$$
SKIP UP SKIP DOWN
E9$$
SKIP UP
RC
* When the [STOP] button is pressed in specific menu, the "TEST MODE STOP" state is set.
ATT Setting Check RSLT2
PLAY : ATT Setting Check menu
PE
SKIP UP SKIP DOWN
: Pit section E-ATT (tracking) setting
PF
SKIP UP SKIP DOWN
: Pit section F-ATT (tracking) setting
GE
SKIP UP SKIP DOWN
: Groove section E-ATT (tracking) setting
GF
SKIP UP SKIP DOWN
: Groove section F-ATT (tracking) setting
HA
SKIP UP SKIP DOWN
: High-reflection A-ATT (focus) setting
HB
SKIP UP SKIP DOWN
: High-reflection B-ATT (focus) setting : Low-reflection A-ATT (focus) setting SKIP DOWN : Low-reflection B-ATT (focus) setting SKIP DOWN : TCRS-ATT setting
LA
SKIP UP
LB
SKIP UP
GC
* When the [STOP] button is pressed in specific menu, the "TEST MODE STOP" state is set. * In the specific setting display state the setting change digit changes when the [P-MODE] button is pressed. · In the case of the setup value three digits. 1st digit (initial value) 2nd digit 3nd digit
P-MODE P-MODE
* In the specific state the setting changes in the range of "0h to Fh" when the [VOLUME +/] button is pressed.
26
MD-MT877/MD-MT877C
Test Mode Normal Playback NORMAL
PLAY : Test mode normal playback menu
@@@@@@
: Normal playback mode @@@@@@: Mode and address indication
* When the [STOP] button is pressed in specific menu, the "TEST MODE STOP" state is set.
EEPROM Setting
· Menu transition
EEPROM
PLAY
: EEPROM setting menu SKIP DOWN
Temp
SKIP UP
: TEMP setting menu
SKIP DOWN : Focus setting menu SKIP DOWN : Tracking setting menu SKIP