Sharp MD-MT831H Service manual

MD-MT831H/W
SERVICE MANUAL
No. SX963MDMT831H
MD-MT831H(GL)
MD-MT831W(GL)
• In the interests of user-safety the set should be restored to its
original condition and only parts identical to those specified be
used.
Illustration: MD-MT831H
Illustration: MD-MT831W
CONTENTS
Page
SAFETY PRECAUTION FOR SERVICE MANUAL ............................................................................................................... 2
SPECIFICATIONS ................................................................................................................................................................. 3
NAMES OF PARTS ............................................................................................................................................................... 4
OPERATION MANUAL .......................................................................................................................................................... 5
QUICK GUIDE ....................................................................................................................................................................... 8
DISASSEMBLY .................................................................................................................................................................... 10
REMOVING AND REINSTALLING THE MAIN PARTS ....................................................................................................... 11
ADJUSTMENT ...................................................................................................................................................................... 12
MD ERROR MESSAGE DISPLAY CONTENT LIST ........................................................................................................... 26
BLOCK DIAGRAM ............................................................................................................................................................... 27
SCHEMATIC DIAGRAM ...................................................................................................................................................... 28
VOLTAGE ............................................................................................................................................................................ 31
WIRING SIDE OF P.W.BOARD ........................................................................................................................................... 32
WAVEFORMS OF MD CIRCUIT ......................................................................................................................................... 35
NOTES ON SCHEMATIC DIAGRAM .................................................................................................................................. 36
TYPES OF TRANSISTOR AND DIODE .............................................................................................................................. 36
TROUBLE SHOOTING ........................................................................................................................................................ 37
FUNCTION TABLE OF IC .................................................................................................................................................... 40
PARTS GUIDE/EXPLODED VIEW
PACKING METHOD (MD-MT831H FOR U.K. ONLY)
SHARP CORPORATION
–1–
This document has been published to be used
for after sales service only.
The contents are subject to change without notice.
MD-MT831H/W
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.
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 houising (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–
TROUBLESHOOTING
When the unit has condensation inside,
the disc signals cannot be read, and the
unit may not function properly.
● If this happens, remove the disc.
The condensation should evaporate in
approximately 1 hour. The unit will then
function properly.
CAUSE
–6–
● Has the track number or character information been
written on the disc yet?
● Is the unit in the recording or editing mode?
The MiniDisc cannot be
ejected.
When this product is subjected to strong
external interference (mechanical shock,
excessive static electricity, abnormal supply voltage due to lightning, etc.) or if it is
operated incorrectly, it may malfunction.
If such a problem occurs, do the following:
1. Unplug the AC adaptor from the AC
socket.
2. Remove the battery.
■ If trouble occurs
If strange sounds, smell or smoke come out
of the unit or an object is dropped into the
unit, remove the AC adaptor from the AC
socket immediately and contact an
authorised SHARP service centre.
3. Leave the unit completely unpowered for
approximately 30 seconds.
4. Plug the AC adaptor back into the AC
socket and retry the operation.
If trouble occurs with a particular MiniDisc
● Depending on the MiniDisc, sound may skip or stop during playback if there is something wrong with the stored information. In such a case, try another MiniDisc before
calling for service.
Recording and editing
are impossible.
● Is the battery exhausted?
● Is the unit being subjected to excessive vibration?
Some sounds are
skipped.
● 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 external equipment?
Read the operation manual for the external equipment.
● Is the unit in the hold mode?
● Is the battery exhausted?
● Is the remote control unit plug or the earphone plug inserted firmly?
When the operation
buttons are pressed, the
unit does not respond.
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?
No sound is heard from
the earphones.
●
●
●
●
●
● 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?
The unit does not turn
on.
PROBLEM
● Shortly after turning on a heater.
● When the unit is placed in a room where
there is excessive steam or moisture.
● When the unit is moved from a cool
place to a warm place.
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.
In the following cases, condensation
may form inside the unit.
■ Moisture condensation
A track number can be created in
the middle of a track.
When recorded tracks are played
back using the cue and review operations, some sounds may be
skipped.
The total of the recorded time and
time remaining on a disc may not
add up to the maximum possible
recording time.
Two tracks may not be combined
in editing.
Even if several short tracks are
erased, the remaining recording
time may not show an increase.
Even if the number of tracks and
the recording time have not
reached the limit, “DISC FULL”
may be displayed.
Even if the maximum recording
time of a MiniDisc has not been
reached, “DISC FULL” or “TOC
FULL” may be displayed.
If there are scratches or dust on a
MiniDisc, the track numbers following that
track will be increased by one.
For MiniDiscs on which repeated recording and editing were performed, some
sounds may be skipped whilst cueing and
reviewing.
A cluster (about 2 seconds) is normally the
minimum unit of recording. So, even if a track
is less than 2 seconds long, it will use about
2 seconds of space on the disc.
Therefore, the time actually available for recording may be less than the remaining time
displayed.
If there are scratches on discs, those sections will be automatically avoided (no recording will be placed in those sections). Therefore, the recording time will be reduced.
For MiniDiscs on which repeated recording and editing operations were performed, the COMBINE function may not
work.
When the remaining recording time of a
disc is displayed, short tracks less than
12 seconds long may not be included in
the total.
If there are scratches on a disc, the unit
will automatically avoid recording in those
areas. The recording time will be reduced.
When the number of tracks used reaches
the limit, regardless of the remaining recording time, further recording will be
impossible.
(Maximum number of tracks: 255)
If a MiniDisc has been recorded or edited repeatedly or if a MiniDisc has
scratches on it, it may not be possible to
record the maximum number of tracks on
it.
MiniDiscs are recorded using a different system than is used for cassette tapes or DAT
recordings. Therefore, the following conditions may be encountered, depending on how
the disc has been recorded or edited. These are due to system limitations, and should be
considered normal.
MINIDISC SYSTEM LIMITATIONS
MD-MT831H/W
(
● Replace the disc with a recorded disc.
● Record using the analogue cable.
● Change the stop position of the track
and then try editing it.
● Record after you check the remaining recording time.
● Reload the disc or replace it.
● 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.
● If the sound you hear is not right, try
recording 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.
● Return the HOLD switch to its original position.
● Turn off the power and remove the
MiniDisc.
● 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.
● Nothing is recorded.
● No copy can be made because of
the SCMS copyright system.
● A track cannot be edited.
● The recordable time is shorter than
the fading time
● The disc is damaged.
● Recording cannot be performed correctly due to vibration or shock in the unit.
● Editing is impossible.
● Cannot save the TOC information
correctly to a MiniDisc.(A large portion of the disc has been damaged.)
● The disc is scratched.
● The disc is out of recording space.
● You have come to the conclusion
that the unit is out of order.
● The unit is in the hold mode.
● The OPEN lever was moved during
recording or editing.
● A disc has not been loaded.
● Poor connection of the digital cable.
● No output signal comes out from the
external unit to playback.
● You tried to record on a playbackonly disc.
BLANK MD
(BLANK)
Can’t COPY
(Can’t C)
Can’t EDIT
(Can’t E)
Can’t FADE
Can’t A.F
–7–
Er-MD**
(ErMD*)
HOLD
(HOLD)
NO SIGNAL
(noSIG.)
PLAY MD
(PLAY md)
) : Error messages seen on the remote control.
* : Number or Symbol.
NO DISC
LOCKED
(Can’t LOCK)
DISC FULL
DEFECT
(DEFECT)
Can’t WRITE
(can’tW)
Can’t STAMP
Can’t REC
(Can’t R)
Can’t READ*
(Can’tS)
(Can’T)
(Can’tU)
BATT EMPTY
(Lo BATT)
Remedy
● Charge the rechargeable battery or
replace the alkaline battery (or use
the AC adaptor for power).
Meaning
● The battery is run down.
Error messages
ERROR MESSAGES
(
Meaning
Remedy
*
● A disc which contains data other than
music was played.
● There is an error in the signal from
the disc.
● A disc which contains non-music
data cannot be played.
● Replace it with another recorded
disc.
Charging is
needed.
● When the battery is completely discharged,
the whole battery indicator will flash. Recharge the battery or replace the alkaline
battery with a new one.
When the battery needs charging, it is
impossible to start recording or editing.
When the battery is
completely charged
< How to read the battery indicator >
Battery indicator
The remaining amount of battery charge
is shown by the battery indicator (
)
during operation.
■ Checking the remaining amount
of battery charge
Notes:
● When using the unit with an alkaline battery or a rechargeable battery, the battery
indicator will not correctly display the remaining capacity for approximately 20 seconds
after the power has been turned on.
● When the AC adaptor included with this unit
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.
● When the rechargeable battery and the alkaline battery are used at the same time,
the rechargeable battery is used first, then
the alkaline battery.
Since the battery indicator shows the remaining amount of the particular battery
being used, the number of bars will increase when the unit switches to the alkaline battery.
● When the battery has run completely out,
“BATT EMPTY” (main unit) and “Lo BATT”
(remote control unit) will appear. Then, the
power will be disconnected automatically.
CONVENIENT OPERATION OF THE UNIT
) : Error messages seen on the remote control.
: Number or Symbol.
? DISC
(? DISC)
Tr. Protect
● Edit the track with the device on
which it was recorded.
● Replace it with another recordable
disc.
● There is no space left for recording
character information (track names,
disc names, etc.).
TOC FULL
● The track has been protected from
being erased.
● Erase all of the signal errors, and
then try recording again.
● There is an error in the recording signal
TEMP OVER
(TEMP!)
TOC FORM**
(T form**)
● Wait for a while and try the operation again.
● Move the write protection knob back
to its original position.
● Load a recordable MD.
● Replace it with a recordable MD.
● Use one of the specified power
sources.
● Turn off the power, and wait for a
while.
● Since a track number is currently
being located or written to, the unit
cannot accept your command.
● The MD is write protected.
● You tried to record without loading
an MD
● A playback-only MD was loaded
and the REC button was pressed
when the power was off.
● Improper power is being supplied.
● The temperature is too high.
SORRY
(SORRY)
PROTECTED
POWER ?
Error messages
MD-MT831H/W
–8–
Plug the remote control unit into the
unit. Push the plug all the way in.
button again.
Press the • ■/:OFF button whilst in the stop mode.
To turn off the power:
Press the • ■/:OFF button.
To stop playback:
Press the
button.
● To resume playback, press the
To interrupt playback:
4
socket on the main
Insert the earphones plug firmly into the earphones socket
on the remote control unit.
3 Insert a MiniDisc.
2
1
■ Play
PLAYING A MINIDISC
■ Adjust the Volume
MD-MT831H/W
MD-MT831H/W
REMOVING AND REINSTALLING THE MAIN PARTS
Remove the mechanism according to the disassembling methods 1 to 5. (See Page 10.)
How to remove the spindle motor (See Fig. 11-1.)
(A2)x3
ø1.4x2.8mm
1. Remove the solder joint (A1) x 4 of flexible PWB.
2. Remove the screws (A2) x 3 pcs., and remove the spindle
motor.
Spindle Motor
MD Mechanism
How to remove the lift motor (See Fig. 11-2.)
1. Remove the solder joint (B1) x 2 of Lift motor.
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.)
How to remove the sled motor (See Fig. 11-3.)
Mechanism Flexible
PWB Solder Joint
(A1)x4
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 2 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.)
Figure 11-1
Solder Joint
(B1)x2
(B2)x1
ø1.4x4.5mm
Lift Motor
MD Mechanism
How to remove the magnetic head (See Fig. 11-4.)
1. Remove the screws (D1) x4 which connects the magnetic
head to the head relay flexible PWB, remove the spring
washers (D2) x 1 and remove the soldering joints (D3) x 2.
Note:
Mount carefully so as not to damage the magnetic head.
(If the gear is damaged, noise is caused.)
Figure 11-2
How to reinstall the optical pickup unit
(See Fig. 11-4.)
(D2)x1
(C3)x2
ø1.4x1.2mm
(C1)x1
1. Remove the screw (E1) x 1 pc.
2. Slowly raise the optical pickup.
(C2)x1
Sled Motor
(D1)x1
ø1.4x2.2mm
(D1)x1
ø1.4x1.8mm
Shaft
Solder Joint
(D3)x2
Pickup Unit
Magnetic head
MD Mechanism
Solder Joint
(C4)x2
(D1)x2
ø1.4x1.1mm
(E1)x1
ø1.7x3mm
Spring
MD Mechanism
Figure 11-3
Figure 11-4
– 11 –
MD-MT831H/W
ADJUSTMENT
Test disc
MD adjustment needs two types of disc, namely recording disc (low reflection disc) and playback-only disc (high
reflection disc).
Type
Test disc
1
High reflection disc MMD-110 (TEAC Test MD)
2
Low reflection disc
MMD-213A (TEAC Test MD)
3
Low reflection disc
Recording minidisc
Parts No.
88GMMD-110
88GMMD-213A
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 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) When the EL on the remote control turns on, release the "VOL-" button
*Since the unit is changed to the setting for production line inspection , be sure to set it to the default setting state in the following default
setting procedure before returning it to the user.
(5) Normal mode setting initialization (BASS setting, VOL setting, etc.)
(6) Indication of microcomputer version for one second [ X X X X X X ]
Destination
Microcomputer version
EEPROM version
(7) Whole LCD lighting for 2 seconds
(8) Test Mode STOP [ T E S T _ ]
*When the PLAY button is pressed during indication (6) and (7), the process proceeds to (8).
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, adjustment error setting .
(3) Change to standby state
Shipping setting method
Press and hold the "VOLUME-DOWN" and "PLAY" buttons on the main unit at the same time, supply power from the DC IN plug [INIT], then
stop the power supply from the DC IN plug after the "BYE OK" display disappears.
Test Mode
1. AUTO 1 Mode
2. AUTO 2 Mode
3. TEST-PLAY Mode
4. TEST-REC Mode
5. MANUAL 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 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. (Updating in real time)
• Seeing the displayed adjustment value, perform
preliminary manual adjustment.
(Error rate indication, jump test
6. MANUAL 2 Mode
7. ERROR INFORMATION
Mode
8. NORMAL Mode
9. EEPROM Mode
10. INNER Mode
– 12 –
• Temperature is displayed. (Updating in real time)
• Seeing the displayed adjustment value perform
manfully the preliminary adjustment.
(Error rate indication, jump test)
• 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 perfomed.
• 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)
• Determine the position where the INNER switch
is turned on. (only high reflection disc).
• The temperature correction is performed only
when servo start is performed, but the posture
correction is not performed.
MD-MT831H/W
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-212.
At this time release the EEPROM (IC402) protection. (Refer to EEPROM write procedure.)
• 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.
• If 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.
• If 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.
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
SKIP UP/DOWN button is changed as follows.
0032 — 0032 — 0032 — 0032 —
• 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.
1 — 10 — 384 — 1
* 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
]
– 13 –
MD-MT831H/W
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.
• When the PLAY button is pressed while the TEST-REC menu appears, the continuous record is initiated from the current pickup position.
• 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.)
[ R P W_
]
* After the laser record power is indicated for one second, the address indication is restored.
•
: 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)
: 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 canceled, and the power is turned off.
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.
9. INNER Mode
• when the STOP button is pressed on the INNER menu (SQ______ ), the state is changed to the TEST mode STOP state.
•
: Address
– 14 –
MD-MT831H/W
EEPROM (IC402) writing procedure
1. Procedure to replace EEPROM and write initial value of microcomputer in EEPROM
(1)
(2)
(3)
(4)
Replace EEPROM.
Refer to the latest EEPROM data list.
Start the test mode. (Refer to "How to enter the test mode".)
Version display
[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 twice 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.
• Set TEST 1, 0 = '01', and turn on power (or set PLAY ON in standby state).
(2) Start the EEPROM mode 'Temp' menu.
• Key operation in order of BASS, SKIP-DOWN x 2 times, 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
Ambient
temperature
+ 9oC ~ +11oC
+12oC ~ +14oC
+15oC ~ +16oC
Temperature
correction
- 05h
- 04h
- 03h
Center
temperature
+ 10.0oC
+ 12.7oC
+ 15.4oC
+17oC ~ +19oC
+20oC ~ +22oC
+23oC ~ +24oC
+25oC ~ +27oC
- 02h
- 01h
± 00h
+ 01h
+ 18.2oC
+ 20.9oC
+ 23.6oC
+ 26.3oC
+28oC ~ +30oC
+31oC ~ +33oC
+ 02h
+ 03h
+ 29.0oC
+ 31.8oC
– 15 –
Ambient
temperature
Temperature
correction
Center
temperature
- 9oC ~ +10oC
+ 3oC ~ +21oC
+15oC ~ +33oC
08h
07h
06h
+ 0.5oC
+ 12.5oC
+ 23.6oC
+26oC ~ +43oC
05h
+ 35.0oC
MD-MT831H/W
EEPROM DATA LIST (EEPROM version c)
Fucus setting
Item display
Spindle setting
Set values
Item display
Set values
FG1_
FG2_
FF0_
FF1_
20H
31H
10H
70H
SPG_
SPi_
SPm_
SPo_
14H
4AH
29H
1FH
FF2_
Ff0_
Ff1_
Ff2_
E8H
10H
40H
E8H
PGM_
SP1_
SP2_
E0H
10H
60H
FZH_
FLn_
FLp_
EDH
0AH
07H
SP3_
SP4_
SP5_
Sp2_
F2H
F2H
10H
60H
DjG_
FSS_
FTS_
FSB_
0DH
1CH
18H
30H
Sp5_
SD1_
SD2_
SPK_
10H
78H
7FH
6BH
FTB_
FGM_
28H
66H
MPG_
48H
Sled setting
Tracking setting
Item display
TG1_
Item display
Set values
18H
TG2_
TF0_
TF1_
TF2_
1FH
10H
70H
E0H
Tf0_
Tf1_
Tf2_
10H
40H
E0H
TFS_
TBo_
TBt_
TKo_
00H
2BH
14H
2BH
TKt_
TDo_
TDt_
12H
67H
34H
SCo_
SCt_
SCm_
CLp_
00H
1AH
53H
24H
CLr_
JPI_
K10_
THP_
3CH
06H
65H
02H
THG_
TOP_
TOG_
02H
00H
F8H
T1P_
20H
Set values
SLG_
SL2_
SLM_
80H
50H
6AH
SKk_
SKt_
SKm_
WTm_
48H
4AH
4DH
24H
SBT_
SBL_
MV1_
0AH
48H
00H
MV2_
SLV_
SIi_
SIm_
FAH
28H
29H
49H
SIo_
SIx_
SLT_
MMV_
59H
AAH
43H
00H
SLP_
4AH
BASS setting
Item display
– 16 –
Set values
B1A_
B1B_
B1C_
3FH
00H
00H
B2A_
B2B_
B2C_
B3A_
1FH
00H
00H
E2H
B3B_
B3C_
00H
00H
MD-MT831H/W
ADJ. SET setting
Item display
Control setting
Item display
Set values
Set values
COK_
FAT_
TAT_
CAT_
38H
C0H
3EH
40H
CT0_
CT1_
CT2_
CT3_
02H
15H
18H
31H
FAB_
E0H
RC0_
RC1_
SYC_
C0H
FEH
A6H
PWC_
PWL_
DR1_
DR2_
12H
26H
09H
47H
IN1_
IN2_
INH_
54H
9DH
64H
DRH_
PLE_
RCE_
ELT_
74H
A6H
94H
A0H
X2T_
SDF_
CHV_
SGP_
C0H
1FH
0CH
B0H
S2P_
SRT_
ST0_
40H
0AH
73H
ST1_
ST2_
ST3_
ST4_
73H
73H
73H
7AH
ST5_
ST6_
ST7_
ST8_
80H
80H
80H
86H
ST9_
STA_
KC0_
8DH
8DH
06H
KC1_
KC2_
KC3_
KC4_
09H
0DH
0FH
11H
KC5_
KC6_
KC7_
12H
16H
17H
KC8_
KC9_
KCA_
1AH
1FH
1FH
TEMP setting
Item display
TM_
Set values
Calculate values
– 17 –
MD-MT831H/W
Test Mode Change Chart
Tset Mode Menu
TEST
: Test Mode STOP
SKIP DOWN
SKIP UP
Slide external
periphery move
Slide internal
periphery move
BASS
SKIP DOWN
AUTO1
SKIP UP
: Pre-auto adjustment menu
SKIP DOWN
AUTO2
SKIP UP
T
SKIP DOWN
PLAY
SKIP UP
T
: ATT auto adjustment menu
SKIP DOWN
REC
SKIP UP
: ATT manual adjustment menu
SKIP DOWN
MANU1
SKIP UP
: Pre-adjustment value check menu
SKIP DOWN
MANU2
SKIP UP
E
: Pre-manual adjustment menu
: ATT adjustment value check menu
SKIP DOWN
DATA
SKIP UP
SKIP DOWN
NORMAL
SKIP UP
INNER
: Error history display menu
SKIP DOWN
EEPROM
SKIP UP
: Digital input signal monitor menu
: EEPROM setting menu
SKIP DOWN
: INNER switch position measurement menu
SKIP UP
* When the [STOP] button is pressed in specific menu, the "TEST MODE STOP" state is set.
* When the [PLAY] button operation is performed in the specific menu, the operation of this
menu is executed.
– 18 –
MD-MT831H/W
Preautomatic Adjustment
AUTO1
: Preautomatic Adjustment menu
PLAY
AT1
: During preadjustment adjustment
Adjustment error
Normal end
ADJ. NG
ADJ. OK
: Preadjustment error (adjustment value output)
: Preadjustment normal end (adjustment value output)
PLAY
AT2
: During ATT automatic adjustment
* When the [STOP] button is pressed in specific menu, the "TEST MODE STOP" state is set.
*"
" represent the adjustment number as follows.
0 0 : Innermost periphery move
0 2 : ABEF offset tentative measurement
0 4 : RF side focus gain coarse adjustment
0 5 : Focus ATT tentative setting
0 6 : RF side bit section tracking gain adjustment
0 7 : COUT level setting for pit section adjustment
0 8 : External periphery move
0 9 : RF side groove section tracking gain adjustment
1 0 : COUT level setting for groove section adjustment
1 1 : RF side TCRS gain adjustment
1 2 : Tracking ATT initial setting
1 3 : RF side focus gain minor adjustment
1 4 : Focus ATT initial setting
1 5 : S gain "High" ABEF offset measurement
1 6 : TCRS offset measurement
1 7 : S gain "Low" ABEF offset measurement
ATT Auto Adjustment
AUTO2
: ATT Autoadjustment menu
PLAY
AT2
: During ATT autoadjustment
Adjustment error
Normal end
ADJ. NG
ADJ. OK
: ATT adjustment error (adjustment value output)
: ATT adjustment normal end (adjustment value output)
PLAY
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.
*"
" represent the adjustment number as follows.
0 0 : Innermost periphery move
0 3 : Pit section tracking ATT setting
0 4 : Pit section focus ATT setting
0 6 : 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)
– 19 –
MD-MT831H/W
Pre-Manual Adjustment
MANU1
: Pre-Manual Adjustment menu
PLAY
TMP
SKIP UP
$ $
SKIP DOWN
: A signal offset (AINO) tentative measurement
: Measurement value
Ah
SKIP UP
SKIP DOWN
: B signal offset (BINO) tentative measurement
: Measurement value
Bh
SKIP UP
SKIP DOWN
: E signal offset (EINO) tentative measurement
: Measurement value
Eh
SKIP UP
SKIP DOWN
Fh
SKIP UP
LON
SKIP UP
P
: AB MAXO measurement
: Measurement value
SKIP DOWN
: B-ATT (focus) tentative setting
: ATT setting
SKIP DOWN
ef
SKIP UP
: Pit section adjustment COUT level setting
: COUT level setting
SKIP DOWN
: Group section LPFEFO measurement
: Measurement value
ef
SKIP UP
SKIP DOWN
: Groove section adjustment COUT level setting
: COUT level setting
GCH
SKIP UP
SKIP DOWN
: TCRSMIO measurement
: Measurement value
TC
SKIP UP
SKIP DOWN
: E-ATT (tracking) initial setting
: ATT setting
SE
SKIP UP
SKIP DOWN
: F-ATT (tracking) initial setting
: ATT setting
SF
SKIP UP
SKIP DOWN
: LPFABO measurement
: Measurement value
ab
SKIP UP
SKIP DOWN
: A-ATT (focus) initial setting
: ATT setting
SA
SKIP UP
SKIP DOWN
SB
SKIP UP
TH
: Bit section LPFEFO measurement
: Measurement value
SKIP DOWN
PCH
SKIP UP
: A-ATT (focus) tentative setting
: ATT setting
SKIP DOWN
Sb
SKIP UP
: Laser ON (Play Power)
SKIP DOWN
Sa
SKIP UP
: F signal offset (FINO) tentative measurement
: Measurement value
SKIP DOWN
AB
SKIP UP
: Temperature code display
$ $ : Temperature code
: B-ATT (focus) initial setting
: ATT setting
SKIP DOWN
: TCRS signal offset (TCRSO) measurement
: Measurement value
– 20 –
MD-MT831H/W
ATT Manual Adjustment
MANU2
: ATT manual adjustment menu
PLAY
TMP
SKIP UP
LON
SKIP UP
$ $
SKIP DOWN
P
: Pit section E-ATT (tracking) setting
: ATT setting
SKIP DOWN
: Pit section F-ATT (tracking) setting
: ATT setting
PF
SKIP UP
SKIP DOWN
: High reflection: A-ATT (focus) setting
: Low reflection: A-ATT (focus) setting
: ATT setting
HA
La
SKIP UP
SKIP DOWN
: High reflection: B-ATT (focus) setting
: Low reflection: B-ATT (focus) setting
: ATT setting
HB
Lb
SKIP UP
SKIP DOWN
GC
SKIP UP
:Groove section E-ATT (tracking) setting
: ATT setting
SKIP DOWN
:Groove section F-ATT (tracking) setting
: ATT setting
GF
SKIP UP
SKIP DOWN
: Low reflection: A-ATT (focus) setting
: ATT setting
LA
SKIP UP
LB
: TCRS ATT setting
: ATT setting
SKIP DOWN
GE
SKIP UP
: Laser ON (Play Power)
SKIP DOWN
PE
SKIP UP
: Temperature code display
$ $
: Temperature code
SKIP DOWN
: Low reflection: B-ATT (focus) setting
: ATT setting
– 21 –
MD-MT831H/W
Continuous Playback
• Continuous playback from current pickup position
T
PLAY
: Continuous playback menu
PLAY
SQ####
AP####
: Continuous playback (pit section)
: Continuous playback (groove section)
# # # # : Address
• Continuous playback from any address
T
PLAY
: Continuous playback menu
DISP
Ad 0 0 3 2
: Start address setting
PLAY
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.
03C0H
0700H
08A0H
0 0 3 2 H (initial value)
DISP
DISP
Ad0 3 C 0
Ad0 0 3 2
DISP
Ad0 7 0 0
950 H
Ad0 8 A 0
DISP
* In the start address setting state the start address change digit changes when the [MODE] button is pressed.
1st digit (initial value)
2nd digit
3rd digit
MODE
MODE
Ad0 0 3 2
Ad0 0 3 2
Ad0 0 3 2
MODE
* In the start address set state the value of selection digit changes in the range of "0h to Fh"
when the [SKIP UP/DOWN] button is pressed
* In the continuous playback state the number of jump lines changes as follows shown
the [BASS] button is pressed.
1 (initial value)
10
384
BASS
1TR
BASS
10TR
3 8 4TR
BASS
* When the [SKIP UP] 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 [SKIP DOWN] 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).
– 22 –
MD-MT831H/W
Continuous Rrecord
• Continuous record from the current pickup position
T
REC
: Continuous record menu
PLAY
: Continuous record
# # # #: Address
• Continuous record playback from any address
AP# # # #
T
REC
: Continuous record menu
PLAY
: Start address setting
Ad 0 0 3 2
PLAY
: Continuous record
# # # #: Address
AP# # # #
* 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
Ad0 7 0 0
Ad0 8 A 0
DISP
950 H
* In the start address setting state the start address change digit changes when the [MODE] button is pressed.
1st digit (initial value)
Ad0 0 3 2
2nd digit
MODE
3rd digit
Ad0 0 3 2
MODE
Ad0 0 3 2
MODE
* In the start address set state the value of selection digit changes in the range of 0h to Fh when
the [SKIP UP/DOWN] 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 [VOL UP/DOWN] button is pressed.
Inner Switch Position Measurement
INNER
: INNER switch position measurement menu
PLAY
SQ####
: Continuous playback (pit section)
# # # # : Address
* When the [STOP] button is pressed in specific menu, the "TEST MODE STOP" state is set.
– 23 –
MD-MT831H/W
Test Mode Normal Playback
NORMAL
: TEST mode normal playback menu
PLAY
@@@@@@
: Continuous playback
@@@@@@: Mode and address display
* When the [STOP] button is pressed in specific menu, the "TEST MODE STOP" state is set.
* When the NORMAL mode is canceled, the power is turned off.
Error History Display
• Error history clear
E
DATA
: Error history display menu
PLAY
CLEAR
: Error history clear
• Error history display
E
DATA
: Error history display menu
PLAY
: Error history 0 display
§ § : Error code
E0§§
SKIP UP
SKIP DOWN
: Error history 1 display
§ § : Error code
E1§§
SKIP UP
SKIP DOWN
E2§§
SKIP UP
SKIP DOWN
E3§§
SKIP UP
: Error history 4 display
§ § : Error code
SKIP DOWN
: Error history 5 display
§ § : Error code
E5§§
SKIP UP
SKIP DOWN
E6§§
SKIP UP
: Error history 7 display
§ § : Error code
SKIP DOWN
E8§§
SKIP UP
E9§§
: Error history 6 display
§ § : Error code
SKIP DOWN
E7§§
SKIP UP
: Error history 3 display
§ § : Error code
SKIP DOWN
E4§§
SKIP UP
: Error history 2 display
§ § : Error code
: Error history 8 display
§ § : Error code
SKIP DOWN
: Error history 9 display
§ § : Error code
* When the [STOP] button is pressed in specific menu, the "TEST MODE STOP" state is set.
– 24 –
MD-MT831H/W
EEPROM Setting
EEPROM
: EEPROM setting menu
PLAY
SKIP DOWN
TEMP
SKIP UP
SKIP DOWN
Focus
SKIP UP
: Focus setting menu
SKIP DOWN
Track
SKIP UP
: Tracking setting menu
SKIP DOWN
Spin
SKIP UP
: Spin setting menu
SKIP DOWN
Sled
SKIP UP
: Sled setting menu
SKIP DOWN
Bass
SKIP UP
: BASS setting menu
SKIP DOWN
ADJSET
SKIP UP
: Adjustment setting menu
SKIP DOWN
DEQSET
SKIP UP
SKIP UP
: TEMP setting menu
: Digital EQ setting menu
SKIP DOWN
CTRL
: Control setting menu
* When the [STOP] button is pressed in specific menu, the "TEST MODE STOP" state is set.
* When the [PLAY] button operation is performed in the specific state, the specific setting menu is set.
Setup operation except for TEMP
Menu name
: Each setting menu
PLAY
Item 1
SKIP UP
SKIP DOWN
Item 2
SKIP UP
SKIP DOWN
Item 3
* When the [STOP] button is pressed in specific menu, the "TEST MODE STOP" state is set.
* When the [DISP] button operation is performed in the specific state, the menu changes to
"TEMP SETTING menu".
* In the specific state the setting changes in the range of "00h to FFh" when the
[VOL UP/DOWN] button is pressed.
(The upper limit varies depending on the items)
* When the [MODE] button is pressed in each state, the set digit is changed.
– 25 –
MD-MT831H/W
TEMP Setting
Temp
: Temp setting menu
PLAY
TM§§
SKIP UP
SKIP DOWN
T p i n
: TEMP reference
: Reference
§ § : Temperature code
: TEMP A/D input value
: Measurement value
* When the [STOP] button is pressed in specific menu, the "TEST MODE STOP" state is set.
* When the [DISP] button operation is performed in the specific state, the menu changes to
"TEMP SETTING menu".
* In the specific state the setting changes in the range of "00h to FFh" when the
[VOL UP/DOWN] button is pressed.
* When the [MODE] button is pressed in each state, the set digit is changed.
MD ERROR MESSAGE DISPLAY CONTENT LIST
Display content
(Remote control)
Error content
'Can' tREAD*'
('Can' tS')
Focus lead-in processing time over
Track search processing time over
'Er-MD80'
('Er-MD80')
Er-MD81
EEPROM readout Check sum error 80: EEPROM ERR
'Er-MD**'
('Er-MD**')
'Can' tREAD*'
('Can' tT')
Error code
30: DISC ERR R
31: DISC ERR S
32: DISC ERR W
Wrong combination of PWB and
81: Mismatch of mechanism and
mechanism
PWB
Loading mechanism operation error 10: MECHA ERR 3E fall
11: MECHA ERR 3M
12: MECHA ERR 3L
20: MECHA ERR 2E rise
21: MECHA ERR 2M
23: MECHA ERR 2D
F1: MECHA ERR 1M EJECT
F2: MECHA ERR 1L
F3: MECHA ERR 1D
Readout of the P-TOC information F8: FOCUS ERROR EJECT operation
is not completed.
F9: TOC ERR S EJECT operation
FA: TOC ERR R EJECT operation
'Er-MD41'
('Er-MD41')
Judged it abnormal by the U-TOC
write test.
41: TOC W ERR
'Can' tREAD*'
('Can tU')
Readout of the U-TOC information
is not completed.
TOC FORM**
Abnormal data DISC detection
MD DATA byte 18 bit 5=1
(Only UTOC ERR R ALL ERASE
is possible.)
C0: UTOC ERR L0
C1: UTOC ERR L1
C2: UTOC ERR L2
C4: UTOC ERR L4
DO: UTOC ERR A
FD: TOC ERR T EJECT operation
– 26 –
Remarks
* indicates the detailed factor.
f: Focus error
r: READ ERR
s: Search time over
w: SD write time over
** indicates the operation state.
(Error code)
3*: Recording head fall
2*: Recording head rise
1*: EJECT
** indicates the detailed factor.
a: Servo adjustment error
f: Focus error
s: Search time over
r: READ ERR
** is an error number.
* indicates the detailed factor.
u: UTOC READ ERR
* indicates the detailed factor.
L*: Loop
a_: Address error
t_: FTNO > LTNO
– 27 –
M
Figure 27 BLOCK DIAGRAM
M903
LIFT
MOTOR
M
M902
SLED
MOTOR
M
+2.5V
+2.7V
+B
Q101
SWITCHING
T
M901
SPINDLE
MOTOR
F
PICK
OPIC
LASER
HEAD
21,25,
27,29
7,9,
12,14
Q101
1-2
28
+2.5V
29,40
IC101
RF SIGNAL
PROCESSOR
IR3R58M
HEAD DRIVER
IC351:74ACT02T
IC353:FTD2005
IC354:CPH5608
37
46
+2.5V
40,42 45,47 57,58
+B
26-30,
32-37,
39-46
2-5,
7-11,
14-23
66
55
AVCC
+2.5V
2
VDD
+1.7V
62
73
74
31,87,98
22
8
2,5-7
83,
84
LCD
82 74
+2.7
+2.35V
SW403
LID
DETECTION
SW401
EJECT
3
OPERATION SWITCH UNIT
14-17
97
IC200
POWER DRIVE
62FP2502
2
3
IC203
1.7V REGULATOR
62FP1702
1,20,21,23-30,
73,93-95
2,5,31
82-84,86,
89-100
IC201
ENCORD/DECORD/
SERVO ATRAC
LR37812
17-25
57,58
3
50
+2.7V
1,12
IC202
IX2824AF
16 BIT D-RAM
IC401
SW902
SYSTEM
DISC
MICROCOMPUTER 75
PROTECT
IX2823AF
4
SW402
HOLD
IC402
58X2404T
EEPROM
+4.5V
+2.7V
8,13
41,63
+9V
49
IC601
DRIVE SERVO/MOTOR 2-5,17
35-38,54
CONTROL
BD6603KV
LASER ON/OFF
+2.7V
PLAYBACK SIGNAL
RECORD SIGNAL
IC1
FLIP FLOP IC
7WH74FK
+B
+2.35V 3
5
VCC
+6~8V
8 18,23
–2.3V
17
4
(DOWN)
IC841
RESET 2.35V
REGULATOR
XC66DS01
19,20
3
(UP/DOWN)
5 6
17
20
7,18
VEE
17
8
L-CH
R-CH
24
22
23
18
8
3
+B
4
IC851 POWER DRIVE
NDS331N
9,16
VCC
IC703
AUDIO AMP.
IR3R59N
VEE
VCC
IC701
AUDIO AMP.
IR3R54N
IC821
P CHANNEL
DUAL FET
FDG312P
IC830
DC/DC CONVERTER
IR3M12N
+2.2V
6
10
19 L-CH 21
20 R-CH 4
IC771
2.5V REGULATOR
62GR2522
5
1,2,23,24
+2.5
IC501
AD/DA
12 CONVERTER
15 AK4519VF
+2.7V
2,3
2
1,6-8
+B
L-CH
R-CH
+B
L-CH
R-CH
J701
2
3
J702
MIC IN
2
3
J701
LINE IN
OPTICAL IN
8
(3.3V)
BATTERY
(2.9~4.1V)
J801
DC IN
(4~5.5V)
J703
REMOTE
CONTROL
7
8
J703
HEADPHONES
4
3
RECHARGEABLE
BATTERY
IC801,IC802
OVER
VOLTAGE
REVERSE
CONNECTION
PROTECTION
CIRCUIT
Q891
Q601
Q602
SWITCHING
2
IC871
4.5V REGULATOR
62GR4522
5
+4.5V
Q721
RIPPLE
FILTER
+2.7V
INPUT/OUTPUT
UNIT
MD-MT831H/W
MD-MT831H/W
P28 P29 P30
R
DCNF
GND1 BIAS VCC1
EFMAGC
SW
2-1
ADAGI
and
RF3
ADIP
AGC
RF2
EFMO
PITG
RF1
NIN
PIN
1+2
1234
3+4
A
DIFF
ADAGC
RF4
ADIPNF
ADIPO
REFI
GND2
BPF
REFO
AOUT
WBO
BIAS
FOK
SENSE
VCC2
ASW
B
OPICPW
SW
AIN
MODE
BIN
T-
DISC
CIN
DINT
DISC
SGAIN
SGAIN
TEMP
DTEMP
RFADD
2.0V
TCGO
TCGI
AOUT
BOUT
EOUT
FSW
FOUT
FIN
ESW
EIN
BOUT
EOUT
BSW
T+
F-
F+
XRT
SYD0
SYD1
SYD2
SYD3
SYD4
SYD5
SYD6
SYD7
SYWR
SYRD
SYRS
C
L171
10µH
D
GND
LDON
LDVAR
OPICGA
D2
S2
S2
G2
D1
S1
S1
G1
E
D1 G1
S
D2 G2
VCC
EFMO
PDCNT
INNSW
INNS
PDC
C1M
H3ROUT
C1P
H3PG2
CSL1
CST
SPVM1
SPWOUT
SPPG1
SPVOUT
EXTCLK
SPVM2
STHB
STALL
SPUOUT
VCC1
SPPG2
VCC2
ASGND
BRK+
SGND
SPCOM
H2FPG1
BRK-
SPWIN
H2FOUT
H2ROUT
H1PG2
PWIN1
H1PG1
PW1VM
IN2R
PW1OUT
H1FOUT
SPVIN
H1VM
SPUIN
IN1F
H1ROUT
PWIN2
PWPG
H1PG2
PW2OUT
H2VM
PW2VM
IN1R
IN2F
SPDRF
FG
CSL2
SP
IN4R
IN4F
IN3F
H4VM
H4PG1
H4FOUT
H3PG1
H4PG2
H4ROUT
C2P
H3FOUT
VG
C2M
H3VM
X176KO
DCNT1
F
IN3R
LDCNT1
LDCNT2
SLDRF
SLDRR
DISC
SPDRR
F+
F-
TTRDRF
TRDRR
FODRF
FODRR
T+
G
H
• NOTES ON SCHEMATIC DIAGRAM can be found on page 36.
1
2
3
4
Figure 28 SCHEMATIC DIAGRAM (1/3)
– 28 –
5
6
TP410
MD-MT831H/W
P28 P29 P30
DADATA
ADDATA
DFCK
BCLK
LRCK
ADPON
DAPON
OPTCNT
DIN
EMPH1
EFMO
DADATA
DCNT
OPTCNT
TEST0
TEST1
DILOCK
VXI
LDCNT1
VPO
EMPH
LDCNT2
X1I
VDD1
DIN
X1O
DGND
DOUT
LRCK
DGND
PLLBVC
TEMON
DFCK
BCLK
TOTMON
ADDATA
LDCNT2
LDCNT1
39
RAA11
RAD0
DAPON
RAD1
RAWEX
FOK
RARASX
SENSE
RAA9
COUT
CIN
DINT
RAD3
MCCK
RAD2
DINTX
XRT
SYD0
SYD1
SYD2
SYD3
SYD4
SYD5
SYD6
SYD7
SYWR
SYRD
SYRS
VDD2
RACASX
DGND
DGND
RSTX
RAOEX
SYSD0
RAA8
SYSD1
RAA7
SYSD2
RAA6
SPDRF
RAA5
SYSD3
SPDRR
SYSD4
VDD2
SYSD6
RAA10
SYRDX
SYSD7
SLDRR
SLDRF
TRDRR
TRDRF
FODRR
FODRF
X176KO
TEST2
DGND
VDD1
VBAT
FIN
EIN
BIN
AIN
TCG
WBI
AGND
VREF
AVCC2
RAA1
EFMI
AVCC
RAA0
SYRS
SYWRX
VCC
I/O1
I/O2
WE
RAS
GND
I/O4
I/O3
CAS
OE
A9
A10
A0
A1
A2
A3
VCC
A8
A7
A6
A5
A4
GND
RAA4
SYSD5
EFMMON
2.0V
TCRS
ADPON
FOK
SENSE
EFMO
PLCK
ACRCER
X700KO
FEMON
RAA2
RAA3
X176KO
FODRF
FODRR
TRDRF
TRDRR
SLDRF
SLDRR
SPDRF
SPDRR
VCCDRAM
+2.7V
TP487A
6
3
7
2
8
1
TP407
TP410
Q602
RT1N441 U
HDON
TP414
LDVAR
TEMP
HKEY2
HKEY1
INN
DCI
DRY
R423
22K
DINT
R424
22K
C200
1
R408
100K
R907
180K
XRT
FOK
SENSE
C401
0.1
C130
0.1
RPLAY
EMPH0
INNSW
SPDRR
R405
10K
RKEY
TP403
TP404
BEEP
PBMUTE
DCEXT
ELON
ELLVL
AUSCLK
AUDATA
TP412
R904
12K
R906
270K
R402
100K
XL401
4.19MHz
Q601
RT1P441 U
3
TP406
TP401
TP402
TP400
4
1
R406
100K
TP415
5152 535455 565758 5960 616263 64656667686970 717273 7475
R404
100K
2
+2.5V
EMPH0
PLAY
PF4
VSS
STOP
EXTAL
XTAL
VCC
µSTBY
NMI
MD2
WDTOVF
RESET
INNSW
MD1
MD0
BUZOUT
ARQ
TP405
R425
22K
AVCC
ELONH
KHOLD
P14
PDCNT
SPWDS
DISCPR
VSS
RMDAT
RPLAY
DSPDAT
SCK0
EPCS
DSPSTB
EEPK
EEPD
DSPSCK
WP
VSS
SYRS
SYRD
SYWR
LDON
45 DISCP
46 SGAIN
47 RACLK
48 RADAT
49 VSS
50
ELONL
REC
C902
0.01
APQD
PBAULT
LDON
DISC
SGAIN
SPIN
IC401
IX2823AF
SYSTEM
MICROCOMPUTER
DCEXT
R909
10K
SPIN
DINT
OPICGA
100
99
98
EJSW 97
CKSTP 96
XRST 95
FOK 95
SENSE 93
DCNT1 92
SWPUP 91
MCMON 90
P24 89
VSS 88
AVSS 87
LDVAR 86
TEMP 85
HKEY2 84
HKEY1 83
RKEY 82
PLVINN 81
PLVDCI 80
PLVDRY 79
Vref 78
77
76
HDON
SW401
EJECT
PCNT2
RPLAY
DISCPR
CIN
IC203
62FP1702
1.7V
REGULATOR
4
VCC
SYD2
PBOPON
R422
100K
RCAULT
MCPGIN
INPGIN
INPGCK
RCPCNT2
TP416
TP416A
TP417
TP417A
PCNT1
SYD1
SYD0
25242322 21201918171615 1413121110 9 8 7 6 5 4 3 2 1
26 SYD3
27 SYD4
28 SYD5
29 SYD6
30 SYD7
31 VSS
32 RCLAT
33 MCPGI
34 INPGI
35 INPGCK
36 RCPCNT
37 TEST1
38 TEST0
39 JPNP
40 VCC
41 OPICGA
42
43 PBLAT
3
2
5
SPIN
CIN
PDCNT
DISCPR
DSPDAT
DSPSTB
R416 1K
R414 1K
R415 1K
DSPSCK
SYD7
SYD6
SYD5
SYD4
SYD3
EFMO
INNSW
PDCNT
1
2
3
1
R855
4
SYD2
SYD1
SYD0
SYWR
SYRD
SYRS
5
C206
1
RDATA
PCNT1
TP411
TP413
HDON
IC404
N7SZ86P5
GATE IC
58X2404T
EEPROM
TP409
EMPH0
VCCENDEC
DCNT1
1.7V
VCC2R5V
1
3
2
R407
10K
IC200
62FP2502
POWER DRIVE
SW402
HOLD
TP610
C605
0.1
C600
22/6.3
L600
2.2µH
TP441
• The numbers 1 to 18 are waveform numbers shown in page 35.
7
8
9
10
Figure 29 SCHEMATIC DIAGRAM (2/3)
– 29 –
11
12
MD-MT831H/W
VOLTAGE
IC101
PIN
NO.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
VOLTAGE
0.27V
0.27V
0.27V
0.27V
1.26V
1.26V
1.26V
1.26V
1.26V
1.26V
1.26V
1.26V
1.26V
1.26V
1.26V
1.26V
1.26V
1.26V
1.26V
1.26V
1.26V
1.26V
1.26V
0.27V
1.48V
–
–
2.50V
2.50V
1.55V
–
1.26V
1.26V
0.23V
1.26V
1.26V
1.27V
1.27V
0.25V
2.50V
1.50V
–
1.26V
–
0.28V
1.26V
0.28V
0.27V
PIN
NO.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
IC202
PIN
NO.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
VOLTAGE
2.70V
1.50V
1.50V
2.50V
1.80V
–
1.00V
–
0.10V
0.50V
–
2.70V
–
0.90V
0.90V
0.90V
–
1.20V
1.00V
1.60V
1.80V
1.40V
1.50V
–
IC201
VOLTAGE PIN
NO.
51
1.25V
52
1.25V
53
–
54
–
–
55
–
56
57
2.50V
–
58
59
–
60
1.27V
61
2.50V
2.50V
62
63
–
64
2.36V
65
0.27V
66
0.27V
67
0.20V
68
0.20V
0.32V
69
70
0.20V
71
0.70V
72
0.70V
2.20V
73
2.33V
74
0.36V
75
0.88V
76
77
2.50V
78
1.27V
–
79
2.50V
80
1.26V
81
1.26V
82
83
1.26V
1.26V
84
1.26V
85
1.26V
86
1.26V
87
1.29V
88
1.70V
89
–
90
–
91
1.26V
92
–
93
–
94
–
95
–
96
–
97
–
98
–
99
100
–
VOLTAGE
0.90V
0.50V
2.00V
1.40V
1.00
2.50V
0.90V
0.90V
0.90V
1.20V
1.20V
1.80V
–
2.10V
1.50V
1.70V
1.0V
1.80V
2.40V
1.60V
1.60V
1.00V
2.40V
1.90V
1.10V
1.26V
–
–
–
2.50V
–
–
–
–
–
1.00V
1.70V
–
0.75V
0.75V
2.70V
1.26V
0.27V
–
1.26V
1.26V
2.50V
–
–
1.25V
IC404
IC351
PIN
NO.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
VOLTAGE
–
–
4.41V
–
–
4.41V
0.10V
–
4.40V
–
1.14V
4.41V
–
0.20V
PIN
NO.
1
2
3
4
5
VOLTAGE
–
2.36V
–
–
2.36V
–
2.36V
2.36V
VOLTAGE
2.52V
0.24V
0.10V
2.25V
2.52V
IC354
PIN
NO.
1
2
3
4
5
IC871
PIN
NO.
1
2
3
4
5
IC402
PIN
NO.
1
2
3
4
5
6
7
8
IC401
PIN VOLTAGE PIN VOLTAGE
NO.
NO.
51
2.50V
2.20V
1
2
52
2.36V
2.50V
2.36V
–
53
3
54
4
–
2.30V
–
0.20V
55
5
–
–
56
6
2.36V
–
57
7
2.36V
0.24V
58
8
2.70V
–
59
9
60
10
2.36V
2.30V
61
2.36V
2.20V
11
2.30V
2.00V
62
12
2.36V
2.30V
13
63
2.36V
2.40V
64
14
2.36V
2.36V
65
15
1.07V
–
66
16
1.13V
2.36V
67
17
–
–
68
18
1.17V
2.35V
19
69
2.33V
0.36V
70
20
–
2.33V
71
21
–
2.20V
72
22
2.52V
0.27V
23
73
2.34V
0.11V
24
74
2.28V
0.60V
25
75
0.12V
0.20V
26
76
2.36V
0.20V
27
77
2.36V
0.40V
78
28
–
0.60V
79
29
1.50V
0.44V
80
30
–
1.40V
81
31
–
2.10V
82
32
2.10V
2.36V
83
33
2.70V
2.36V
84
34
2.70V
1.47V
85
35
–
2.36V
86
36
–
2.35V
37
87
–
2.35V
38
88
–
2.34V
39
89
–
2.36V
90
40
–
–
91
41
2.36V
2.32V
92
42
–
2.36V
93
43
–
2.52V
94
44
–
2.36V
95
45
–
1.18V
96
46
–
2.34V
97
47
–
2.36V
98
48
–
2.36V
49
99
–
2.18V
100
50
Preform the measurement on
the IC401 pin 37 in the TEST
mode with GND short-circuited.
(LCD is in "TEST" state.)
VOLTAGE
–
10.90V
2.36V
–
4.45V
IC353
PIN
NO.
1
2
3
4
5
6
7
8
VOLTAGE
2.72V
–
–
–
–
–
–
2.72V
VOLTAGE
0.10V
0.20V
–
–
–
IC200
PIN
NO.
1
2
3
VOLTAGE
0.38V
–
–
–
–
–
–
4.60V
–
–
–
–
4.65V
–
–
0.72V
–
0.15V
0.15V
0.15V
0.40V
–
–
–
0.15V
–
0.15V
–
0.15V
–
0.85V
1.80V
2.44V
2.50V
–
–
–
–
–
–
4.74V
–
–
–
–
0.23V
0.05V
0.05V
4.38V
0.20V
0.26V
0.20V
0.30V
–
–
–
0.20V
0.20V
0.20V
0.20V
–
–
4.90V
–
IC701
PIN
NO.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
VOLTAGE
1.43V
–
–
–
1.40V
–
–
1.32V
–
–
–
–
–
–
–
–
–2.2V
–
–
2.14V
0.83V
–
–
–
IC830
PIN
NO.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
VOLTAGE
–
–
0.47V
–
–
2.14V
–2.2V
–
2.14V
–
1.08V
2.72V
2.36V
–
–
2.14V
–
–2.2V
–2.2V
–
–
0.48V
–
–
PIN
NO.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
VOLTAGE
–
2.72V
2.72V
–
2.51V
VOLTAGE
2.51V
2.51V
–
–
–
–
–
–
1V
1V
1V
0.10V
–
2.51V
–
–
0.18V
–
0.27V
0.36V
–
–
2.51V
2.51V
IC841
IC771
PIN
NO.
1
2
3
4
5
1.25V
1.24V
2.35V
1.22V
1.24V
1.10V
–
0.37V
–
–
–
–
0.86V
2.35V
–
–
2.75V
4.60V
1.21V
1.24V
1.22V
1.24V
4.66V
0.56V
IC501
IC703
PIN
NO.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
VOLTAGE
PIN
NO.
1
2
3
4
5
VOLTAGE
2.36V
–
2.36V
4.60V
–
VOLTAGE
0V
2.5V
2.7V
IC2
PIN
NO.
1
2
3
4
5
6
7
8
IC601
PIN
NO.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
VOLTAGE
1.00V
2.20V
–
–
–
1.76V
1.76V
1.76V
– 31 –
IC801
IC821
PIN
NO.
1
2
3
4
5
6
VOLTAGE
2.77V
2.77V
2.77V
4.66V
2.76V
2.76V
PIN
NO.
1
2
3
4
5
6
IC851
PIN
NO.
D
S
G
VOLTAGE
4.08V
0V
0.36V
VOLTAGE
–
0.20V
–
–
0.72V
0.72V
IC203
PIN
NO.
1
2
3
VOLTAGE
0V
2.0V
2.15V
IC802
PIN
NO.
1
2
3
4
5
6
VOLTAGE
5.10V
5.10V
0.71V
–
5.10V
4.85V
MD-MT831H/W
A
B
C
D
E
F
G
H
• The numbers 1 to 18 are waveform numbers shown in page 35.
1
2
3
4
Figure 32 WIRING OF P.W.BOARD (1/3)
– 32 –
5
6
MD-MT831H/W
A
TO MAIN PWB
P32 4-H
CN601
OPTICAL
PICKUP
UNIT(15)
B
SW901
DISC PROTECT(8-2)
M903
LIFT MOTOR
PH901
PHOTE
INTERRUPTER
(8-3)
C
CN101
TO MAIN PWB
P32 2-H
M902
SPINDLE MOTOR
MECHANISM
FLEXIBLE
PWB Ass'y(8)
D
LCD Ass'y(235)
M901
SLED MOTOR
E
TO MAIN PWB
P32 4-B
CN451
CN451
F
MAGNETIC HEAD(21)
KEY SWITCH
FLEXIBLE PWB Ass'y(234)
G
H
1
2
3
4
Figure 34 WIRING OF P.W.BOARD (3/3)
– 34 –
5
6
MD-MT831H/W
WAVEFORMS OF MD CIRCUIT
T
Stopped
CH1=1mV
DC 10:1
1
CH2=500mV
DC 10:1
CH3=5V
DC 10:1
TP208
(FEOUT)
1994 / 12 / 15 22:54:19
CH4=2V
50ms/div
DC 10:1
(50ms/div)
NORM:200kS / s
1
2
TP122
(F+)
3
CK205
(SENSE)
4
CK204
(FOK)
2
3
T
4
=Filter=
Smoothiing : OFF
BW : FULL
CH1
CH2
CH3
CH4
=Offset=
:
0.00V
:
0.000V
:
0.00V
:
0.00V
=Record Length=
Main :
10K
Zoom : 10K
T
Stopped
CH1=2V
DC 10:1
=Trigger=
Mode : NORMAL
Type : EDGE CH4
Detay :
0.0ns
Hold OFF :
MINIMUM
1994 / 12 / 15 23:31:21
50ms/div
(50ms/div)
ENV
CH2=2V
DC 10:1
T
12
SPDRR
13
TP601
(VM)
1
2
=Filter=
Smoothiing : OFF
BW : FULL
Stopped
CH1=2V
DC 10:1
9
CH1
CH2
CH3
CH4
=Offset=
:
0.00V
:
0.00V
:
0.00V
:
0.00V
=Record Length=
Main :
10K
Zoom : 10K
T
CH2=2V
DC 10:1
CH3=500mV
DC 10:1
=Trigger=
Mode : NORMAL
Type : EDGE CH1
Detay :
0.0ns
Hold OFF :
MINIMUM
1994 / 12 / 15 08:57:26
2ms/div
(2ms/div)
ENV
TP201
(EFM)
2
10
TP210
(TEOUT)
11
TP209
(TOTAL)
T
1
=Filter=
Smoothiing : OFF
BW : FULL
Stopped
CH1=500mV
DC 10:1
CK109
(HPFO)
=Offset=
CH1 :
0.00V
CH2 :
0.00V
CH3 :
0.000V
CH4 :
0.0V
=Record Length=
Main :
10K
Zoom : 10K
=Trigger=
Mode : NORMAL
Type : EDGE CH1
Detay :
0.0ns
Hold OFF :
MINIMUM
1994 / 12 / 15 09:10:03
20us/div
(20us/div)
ENV
CH2=2V
DC 10:1
T
1
CK108
(WBO)
2
=Filter=
Smoothiing : OFF
BW : FULL
=Offset=
CH1 :
0.000V
CH2 :
0.00V
CH3 :
0.000V
CH4 :
0.0V
=Record Length=
Main :
4K
Zoom : 4K
=Trigger=
Mode : NORMAL
Type : EDGE CH1
Detay :
0.0ns
Hold OFF :
MINIMUM
For TP208, TP209, and TP210, use the specific LPF, and
observe the waveform.
10K
When watching the EEM monitor (TP201)
Set MSL from 00H to 80H with EEPROM control setting. After
completion restore 00H.
Measurement
TP
1000P
– 35 –
MD-MT831H/W
NOTES ON SCHEMATIC DIAGRAM
• Resistor:
To differentiate the units of resistors, such symbol as K and
M are used: the symbol K means 1000 ohm and the symbol
M means 1000 kohm and the resistor without any symbol is
ohm-type resistor. Besides, the one with “Fusible” is a fuse
type.
• Capacitor:
To indicate the unit of capacitor, a symbol P is used: this
symbol P means micro-micro-farad and the unit of the
capacitor without such a symbol is microfarad. As to electrolytic capacitor, the expression “capacitance/withstand voltage” is used.
(CH), (TH), (RH), (UJ): Temperature compensation
(ML): Mylar type
B
(G)
(3)
E
(S)
1
TOP
VIEW
DESCRIPTION
REF. NO
POSITION
SW401
EJECT
OFF—ON
SW402
HOLD
OFF—ON
SW403
LID DETECTION
OFF—ON
SW902
DISC PROTECT
OFF—ON
TOP VIEW
TOP VIEW
TOP VIEW
F10J2E
F05J2L
MA793
1SS360
C
(D)
(2)
2SA17457
2SC4738 BL
RN1104
RN1444 A
RT1P441 U
RT1N441 U
TOP VIEW
TOP VIEW
6
1
5
2
4
3
RB731U
• The indicated voltage in each section is the one measured
by Digital Multimeter between such a section and the chassis with no signal given.
• Parts marked with “
”(
) are important for
maintaining the safety of the set. Be sure to replace these
parts with specified ones for maintaining the safety and
performance of the set.
TOP VIEW
SBE803
1SS361
Figure 36 TYPES OF TRANSISTOR AND DIODE
– 36 –
TOP VIEW
2SA1873 GR
MD-MT831H/W
TROUBLE SHOOTING
It is advisable to use the TEST mode (refer to Error Data Display Mode, P14) indicating the causes of troubles before
starting repair. Causes of operation errors (up to 10 errors) are recorded as error codes. This information is useful
for repair.
When does not function
When the CD section does not operate When the objective lens of the optical pickup is dirty,this section may not operate.Clean
the objective lens,and check the playback operation.When this section does not operate even after the above step is taken,check
the following items.
Remove the cabinet and follow the troubleshooting instructions.
"Track skipping and/or no TOC(Table Of Contents) may be caused by build up of dust other foreign matter on the laser pickup lens.
Before attempting any adjustment make certain that the lens is clean. If not, clean it as mentioned below."
Turn the power off.
Gently clean the lens with a lens cleaning tissue and a small amount of isopropyl alcohol.
Do not touch the lens with the bare hand.
Is the power supply turned on when the remote control
button or main unit
button is pressed?
No
Perform the check stated in item "Power is not turned on
when the PLAY button is pressed".
Yes
Does the display operate normally?
Perform the check stated in item "Abnormal display".
No
Yes
Is playback state set?
No
Yes
Perform the check stated in item "Playback state connot be
set".
Perform the check stated in item "Audio playback circuit".
Is audio output normal?
No
Yes
Is recording/playback operation normal?
• Power is not turned on when the
pressed.
/
Is power turned on when the remote control
pressed?
No
Perform the check stated in item "Recording/playback
operation".
Yes
Check the periphery of remote controller and main unit
headphone terminal (J703) and IC401.
button is
button is
No
Is operation normal when the main body button is pressed?
No
Is the pin 55 of IC401 in H state?
Check the position of Hold switch.
No
Yes
Does the pin 66 of IC401 oscillate?
No
– 37 –
Replace XL401.
MD-MT831H/W
• Abnormal display
Is waveform output from CN451 pins 1 to 3?
Are the pin10 (VCC) and pin 6 (GND) normal?
Is waveform output from IC401 pins 9,11,13?
No
No
Yes
Check between IC401 and
CN451.
Check the periphery of IC401.
Yes
Check for pattern breakage of flexible PWB, check for
defects of display microcomputer (replace the display unit).
• Playback state cannot be set
When it has been ascertained that the address up to cluster address is normal in the TEST mode.
Is initialization performed normally in case of high- reflection
disc playback?
Yes
Does the playback time display advance?
No
No
Check IC201 and IC202 connection line.
Is the lead-in photointerrupter set to OFF when the optical
pickup moves to the innermost periphery in NORMAL mode?
(Is TP662 in H level?).
No
Check the lead-in photointerrupter, mechanical flex
PWB soldering and CN601 connection.
Yes
Ia an attempt to repeat repeatedly the TOC part performed
on the low-reflection disc?
No
Replace the disc.
Yes
Position check in INNER mode
• Audio playback clrcult
Although the playback time display is acting., no sound is given during playback in the normal mode.
Is audio wavefrom output from IC501 pins 19 and 20?
No
Check IC201 pins 70 to 72, pin 74 and IC501 pins 9, 10, 11,
15
Yes
Is audio wavefrom output from IC703 pins 8 and 17.
No
Check the pins 4 and 21 of IC703.
Yes
Is audio wavefrom output from J703 pins 3 and 4.
No
Yes
Check headphones jack,and periphery of headphone.
– 38 –
Check whether there is defective solder joint of audio signal
line between IC703 and J703
MD-MT831H/W
• The spindle motor fails to run.Does the head move
Does the waveform appear on the IC201 pins 24 and 25 after
TEST mode AUTO2 completion and in this state?
No
Check the IC201 periphery.
Yes
Does waveform appear on the IC601 pin 64?
No
Replace. IC601
Yes
Does waveform appear on IC601 pins 25, 27 and 29?
No
L608, IC201, IC601, CN601 and flex, etc. soldering check
Yes
Replace the spindle motor.
• Recording/playback operation
Insert a low reflection disc, and ascertain audio output by normal playback, and then set TEST REC mode.
Does the head move down, failing to start record even
when the continuous record mode is set after address?
Yes
Check voltage of pins 57 and 58 of IC201, pins 37, 38, 45, and
47 of IC601, pins 1 and 2 of CN601. Check whether disc is
record-inhibited.
No
Does the RF waveform appear at TP201 (when monitoring
the RF waveform, set to MSL:80H using the control setting
item of EEPROM) when recording/playback is performed?
Yes
No
Is the level during recording different from that during
playback at the pin 86 of IC401?
No
Check periphery of IC401 and IC101.
Yes
Is RF pattern output from IC201 pin 50?
No
Check for soldering failure of IC201 .
Yes
Check whether there is any damage in IC101, periphery of
laser diode.
Check for defects of IC351 in head drive flexible PWB,head,
flexible PWB.
Is audio monitor output given in normal mode LINE IN
record?
Yes
Check waveforms of pins 9 to 12 of IC501, pins 70 to 73 of
IC201.
No
Is waveform obtained on IC501 pins 3 and 6?
Yes
Check whether the pin 7 of IC501 and the pin 81 of IC201 are in
H state.
No
Does voltage on the IC701 pins 13 to 15 change in case of
record VOLUME UP/DOWN?
No
Is audio waveform observed on the pins 18 and 19 of
IC703?
Yes
Check whether input waveform is observed on the pins 8
and 17 of IC703.
– 39 –
MD-MT831H/W
FUNCTION TABLE OF IC
IC202 RH-iX2824AFZZ: 16 Bit D-RAM (IX2824AF)
Function
Terminal Name
Pin No.
1
Vcc
Power supply (2.6V)
2
DQ1
Data input/data output
3
DQ2
Data input/data output
4
WE
Write enable
5
RAS
Low address strobe
6
NC
Not connected
7
A10
Address input
8-11
A0-A3
Address input
12
Vcc
Power supply (2.6V)
13
Vss
Ground (0V)
14-19
A4-A9
Address input
20
OE
Output enable
21
CAS
Column address strobe
22
DQ3
Data input/data output
23
DQ4
Data input/data output
24
Vss
Ground (0V)
IC202 RH-iX2824AFZZ: 16 Bit D-RAM (IX2824AF)
Vcc 1
24 Vss
DQ1 2
23 DQ4
DQ2 3
22 DQ3
WE
21 CAS
4
20 OE
RAS 5
NC
19
6
A9
A10 7
18 A8
A0
8
17 A7
A1
9
16 A6
A2 10
15 A5
A3 11
14 A4
Vcc 12
13 Vcc
Figure 40 BLOCK DIAGRAM OF IC
IC402 VHi58X2404T-1: EEPROM (58X2404T)
Function
Terminal Name
Pin No.
1-3
A0-A2
Device address
4
VSS
Ground
5
SDA
Serial data input/output
6
SCL
Serial clock input
7
WP
Write protect
8
VCC
Power supply
– 40 –
MD-MT831H/W
IC401 RH-iX2823AF04 :System Microcomputer (IX2823AF) (1/2)
Pin No.
1
Port Name
P12/TCLKA
Terminal Name Input/Output
CIN
Input
2
TCLKB
SPIN
Input
3*
P14
P14
Output
Function
Track cross signal/focus drive detection
Spindle motor FG pulse detection input
(not used)
4
P15
DISCPR
Input
Disc record inhibition switch input
5*
TIOCA2
SPWDS
Input
Spindle motor FG pulse width detection
6
P17
PDCNT
Output
7
Vss
VSS
8
TxD0
RMDAT
Output
Output
9
TxD1
DSPDAT
10
P32
P32
11*
P33
DSPSTB
—
Input
Output
Inner detection PD current control output
Ground potential
Remote control indication data output
Unit indication data output
Reserve (_RPLAY (connected to the pin 75)
Main unit display strobe output
12*
SCK0
SCK0
Output
Serial I/O clock output (not used)
13
SCK1
DSPSCK
Output
Unit indication data clock output
14
PE0
_EPCS
Output
EEPROM chip selection output
15
PE1
EEPD
Input/Output
16
PE2
EEPK
Output
EEPROM serial clock output
17*
PE3
EPRT
Output
EEPROM write protection
18
Vss
VSS
19
PE4
PCNT1
Outout
Vref supply control output of power IC
20
PE5
SYRS
Output
System LSI register selection output
21
PE6
_SYRD
Output
System LSI read enable output\
22
PE7
_SYWR
Output
System LSI write enable output
23-30
PD0-PD7
SYD0-SYD7
31
Vss
VSS
32
PC0
PCLAT
33
PC1
_MCPGI
Input
Microphone plug insertion detection input
34
PC2
_INPGI
Input
Line/digital plug insertion detection
35
PC3
INPGCK
Input
36
PC4
RCPCNT
Input/Output
37
PC5
TEST1
38
PC6
TEST0
Input
Test mode setting input 0
39
PC7
JPNP
Input
Kana conversion/Kana input existence/nonexistence discrimination
40
Vcc
VCC
—
41*
PB0
OPICGA
42*
PB1
_LCDRST
43
PB2
PBLAT
Output
Audio IC data latch output
44
PB3
LDON
Output
P.U. laser ON/OFF control output
45
PB4
DISCP
Output
RF amplifier TE polarity switching output
46
PB5
SGAIN
Output
RF amplifier gain polarity switching output
47
PB6
RACLK
Output
Audio IC data clock output
48
PB7
RADAT
Output
Audio IC serial data output
49
Vss
VSS
50
PA0
_ELONH
Output
EL lighting control output H
51
PA1
_ELONL
Output
EL lighting control output L
52
PA2
_REC
53
PA3
PBOPON
Output
Audio IC output stage control output
54
P20
P20
Output
Reserve
55
P21
_KHOLD
Input
Unit key hold switch input
56
TIOCC3
BUZOUT
Output
Beep sound pulse output
57
MD0
MD0
Input
58
MD1
MD1
Input
Operation mode selection input 1
59
P23
INNSW
Input
Mechanism inner SW position detection input
—
Input/Output
—
Output
Input
Output
Input
—
Input
EEPROM serial data input/output
Ground potential
System LSI parallel data bus
Ground potential
Record audio IC data latch output
Line/digital plug type detection
Record circuit power control output
Test mode setting input 1
Positive power supply
P.U detection sensitivity switching output
LCD reset
Ground potential
Unit REC button operation detection input
Operation mode selection input 0
In this unit, the terminal with asterisk mark (*) is (open) terminal which is not connected to the outside.
– 41 –
MD-MT831H/W
IC401 RH-iX2823AF04 :System Microcomputer (IX2823AF) (2/2)
Pin No.
Port Name
Terminal Name Input/Output
Output
Function
60
WDTOVF
WDTOVF
61
MD2
MD2
Input
62
RES
_RESET
Input
Microcomputer hard reset input
63
NMI
_NMI
Input
Nonmaskable interruption (not used)
64
STBY
_STBY
Input
Microcomputer standby input (not used)
65
Vcc
VCC
—
Positive power supply
66
XTAL
XTAL
—
Crystal connection terminal
67
EXTAL
EXTAL
—
Crystal connection terminal
68
Vss
VSS
—
Ground potential
69
PF7
PF7
Output
70
PF6
_PLAY
Input
71
PF5
EMPH0
Output
72*
PF4
PF4
Output
73
PF3
_DINT
74
PF2
_ARQD
Input
Disk cap opens and closes detection/it is started and required
75
PF1
_RPLAY
Input
Remote control PLAY key operation detection input
76
IRQ0
_ARQK
Input
Start request by the key /DC-IN input
77
AVcc
AVCC
—
A/D and D/A converter positive power supply
78
Vref
VREF
—
A/D and D/A converter reference voltage
79
AN0
PLVDRY
Input
Dry battery voltage detection input
80
AN1
PLVDCI
Input
DC jack voltage detection input
81
AN2
PLVINN
Input
Lithium battery voltage detection input
82
AN3
RKEY
Input
Remote control key operation detection input
83
AN4
HKEY1
Input
Unit key operation detection input 1
84
AN5
HKEY2
Input
Unit key operation detection input 2
85
AN6
TEMP
Input
86
DA1
LDVAR
Output
87
AVss
AVSS
—
A/D and D/A converter ground potential
88
Vss
VSS
—
Ground potential
89*
P24
P24
Output
(not used)
90
TIOCB4
MCMON
Output
Internal operation status monitor
91*
P26
P26
Output
Spare
92
P27
DCNT
Output
Mechanism driver enable output
93
PG0
SENSE
Input
System LSI servo sense input
94
PG1
_FOK
Input
Focus OK signal input
95
PG2
_XRST
Output
System LSI hard reset output
96
PG3
CKSTP
Output
Microcomputer standby operation monitor output
97
PG4
_EJSW
Input
98
Vcc
VDD
99
P10
PCNT2
Output
Vcc supply control output of power IC
100
P11
HDON
Output
Recording head current control output
Input
—
Watch dog timer (not used)
Operation mode selection input 2
Reserve
Unit PLAY button operation detection input
Audio emphasis control output 0
Spare
System LSI interruption
Ambient temperature detection input
P.U. laser power setting output
Ejection lever operation detection input
Positive power supply
In this unit, the terminal with asterisk mark (*) is (open) terminal which is not connected to the outside.
– 42 –
MD-MT831H/W
IC601 VHiBD6603KV-1: Drive Servo/Motor Control (BD6603KV) (1/2)
Function
Terminal Name
Pin No.
1*
PWIN2
Half bridge 2 input
2
IN1F
Half bridge 1 forward input
3
IN1R
Half bridge 1 reverse input
4
IN2F
Half bridge 2 forward input
5
IN2R
Half bridge 2 reverse input
6
H1PG2
Half bridge 1 power section GND 2
7
H1ROUT
Half bridge 1 reverse output
8
H1VM
Half bridge 1 power section power supply
9
H1FOUT
Half bridge 1 forward output
10
H2PG1
Half bridge 1 power section GND 1
11
H2PG2
Half bridge 2 power section GND 2
12
H2ROUT
Half bridge 2 reverse output
13
H2VM
Half bridge 2 power section power supply
14
H2FOUT
Half bridge 2 forward output
15
H2PG1
Half bridge 2 power section GND 1
16
BRK-
Brake comparator input (-)
17
BRK+
Brake comparator input (+)
18
SPUIN
SPIN detection comparator input (U phase)
19
SPVIN
SPIN detection comparator input (V phase)
20
SPWIN
SPIN detection comparator input (W phase)
21
SPCOM
SPIN motor coil midpoint input terminal
22
SGND
Small signal section GND (MOS)
23
ASGND
Small signal section GND (Bip.)
24
SPPG2
Spindle power section GND 2
25
SPUOUT
Spindle motor output (U phase)
26
SPVM2
Spindle power section power supply 2
27
SPVOUT
Spindle motor output (V phase)
28
SPPG1
Spindle power section GND1
29
SPWOUT
Spindle motor output (W phase)
30
SPVM1
Spindle power section power supply 1
31
CST
Start oscillation capacitor connection terminal
32
CSL2
Slope capacitor connection terminal 2
33
CSL1
Slope capacitor connection terminal 1
34
FG
FG output
35
IN4R
Half bridge 4 reverse input
36
IN4F
Half bridge 4 forward input
37
IN3R
Half bridge 3 reverse input
38
IN3F
Half bridge 3 forward input
39
H4PG1
Half bridge 4 power section GND1
40
H4FOUT
Half bridge 4 forward output
41
H4VM
Half bridge 4 power section power supply
42
H4ROUT
Half bridge 4 reverse output
43
H4PG2
Half bridge 4 power section GND2
44
H3PG1
Half bridge 3 power section GND1
45
H3FOUT
Half bridge 3 forward output
46
H3VM
Half bridge 3 power section power supply
47
H3ROUT
Half bridge 3 reverse output
48
H3PG2
Half bridge 3 power section GND2
49
VG
Chargepump output
50*
C2M
CHARGEPUMP capacitor 2 connection terminal -
51*
C2P
CHARGEPUMP capacitor 2 connection terminal +
In this unit, the terminal with asterisk mark (*) is (open) terminal which is not connected to the outside.
– 43 –
MD-MT831H/W
IC601 VHiBD6603KV-1: Drive Servo/Motor Control (BD6603KV) (2/2)
Function
Terminal Name
Pin No.
52*
C1M
53*
C1P
CHARGEPUMP capacitor 1 connection termina l CHARGEPUMP capacitor 1 connection terminal +
54
EXTCLK
Synchronous clock input terminal
55
STHB
Half bridge mute terminal
56
STALL
Stand-by terminal
57
VCC1
Small signal section power supply terminal 1 (MOS)
58
VCC2
Small signal section power supply terminal 2 (Bip.)
59*
PW2VM
Half bridge 2 power section power supply
60*
PW2OUT
Half bridge 2 output
61
PWPG
Half bridge power section GND
62
PW1OUT
Half bridge 1 output
63
PW1VM
Half bridge 1 power section power supply
64
PWIN1
Half bridge 1 input
In this unit, the terminal with asterisk mark (*) is (open) terminal which is not connected to the outside.
H3PG2
H3ROUT
H3VM
H3FOUT
H3PG1
H4PG2
H4ROUT
H4VM
H4FOUT
H4PG1
IN3F
IN3R
IN4F
IN4R
FG
CSL1
IC601 VHiBD6603KV-1: Drive Servo/Motor Control (BD6603KV)
48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
BD6603KV
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
PWIN2
IN1F
IN1R
IN2F
IN2R
H1PG2
H1ROUT
H1VM
H1FOUT
H1PG1
H2PG2
H2ROUT
H2VM
H2FOUT
H2PG1
BRK-
VG
C2M
C2P
C1M
C1P
EXTCLK
STHB
STALL
VCC1
VCC2
PW2VM
PW2OUT
PWPG
PW1OUT
PW1VM
PWIN1
Figure 44 BLOCK DIAGRAM OF IC
– 44 –
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
CSL2
CST
SPVM1
SPWOUT
SPPG1
SPVOUT
SPVM2
SPUOUT
SPPG2
ASGND
SGND
SPCOM
SPWIN
SPVIN
SPUIN
BRK+
MD-MT831H/W
PARTS GUIDE
MODEL
MD-MT831H(GL)
MD-MT831W(GL)
“HOW TO ORDER REPLACEMENT PARTS”
To have your order filled promptly and correctly, please furnish the
following information.
1. MODEL NUMBER
2. REF. No.
3. PART NO.
4. DESCRIPTION
For U.S.A. only
Contact your nearest SHARP Parts Distributor to order.
For location of SHARP Parts Distributor,
Please call Toll-Free;
1-800-BE-SHARP
MARK: SPARE PARTS-DELIVERY SECTION
Explanation of capacitors/resistors parts codes
Capacitors
Resistors
VCC ....................... Ceramic type
VCK ........................ Ceramic type
VCT ........................ Semiconductor type
VC • • MF ............... Cylindrical type (without lead wire)
VC • • MN ............... Cylindrical type (without lead wire)
VC • • TV ................ Square type (without lead wire)
VC • • TQ ............... Square type (without lead wire)
VC • • CY ............... Square type (without lead wire)
VC • • CZ ............... Square type (without lead wire)
VC • • • • • • • • • J .. The 13th character represents capacity difference.
("J" ±5%, "K" ±10%, "M" ±20%, "N" ±30%,
"C" ±0.25 pF, "D" ±0.5 pF, "Z" +80-20%.)
VRD ....................... Carbon-film type
VRS ........................ Carbon-film type
VRN ....................... Metal-film type
VR • • MF ............... Cylindrical type (without lead wire)
VR • • MN ............... Cylindrical type (without lead wire)
VR • • TV ................ Square type (without lead wire)
VR • • TQ ............... Square type (without lead wire)
VR • • CY ............... Square type (without lead wire)
VR • • CZ ............... Square type (without lead wire)
VR • • • • • • • • • J .. The 13th character represents error.
("J" ±5%, "F" ±1%, "D" ±0.5%.)
If there are no indications for the electrolytic capacitors, error is ±20%.
If there are no indications for other parts, the resistors are ±5%
carbon-film type.
NOTE:
Parts marked with “
” are important for maintaining the safety of the set.
Be sure to replace parts with specified ones for maintaining the safety and performance of the set.
MD-MT831H/W
NO.
PRICE
RANK
PARTS CODE
DESCRIPTION
NO.
INTEGRATED CIRCUITS
IC1
IC101
IC200
IC201
VHI7WH74FK/-1
VHIIR3R58M/-1
VHI62FP2502-1
VHILR37812/-1
J
J
J
J
AE
AM
AE
BA
IC202
IC203
IC351
IC353
IC354
IC401
RH-IX2824AFZZ
VHI62FP1702-1
VHI74ACT02T-1
VHIFTD2005/-1
VHICPH5608/-1
RH-IX2823AF04
J
J
J
J
J
J
AX
AE
AE
AG
AH
AV
IC402
IC404
IC501
IC601
VHI58X2404T-1
VHIN7SZ86P5-1
VHIAK4519VF-1
VHIBD6603KV-1
J
J
J
J
AF
AE
AQ
AX
IC701
IC703
IC771
IC801
IC802
VHIIR3R54N/-1
VHIIR3R59N/-1
VHI62GR2522-1
VHIHN1C01FU-1
VHIFDC634P/-1
J
J
J
J
J
AQ
AN
AG
AD
AG
IC821
IC830
IC841
VHIFDG312P/-1
VHIIR3M12N/-1
VHIXC66DS01-1
J
J
J
AD
AM
AF
IC851
IC871
VHINDS331N/-1
VHI62GR4522-1
J
J
AD
AG
Flip Flop IC,7WH74FK
RF Signal Processor,IR3R58M
Power Drive,62FP2502
Encode/Decode/Servo Atrac,
LR37812
16Bit D-RAM,IX2824AF
1.7V Regulator,62FP1702
Head Driver,74ACT02T
Head Driver,FTD2005
Head Driver,CPH5608
System Microcomputer,
IX2823AF
EEPROM,58X2404T
Gate IC,N7SZ86P5
AD/DA Converter,AK4519VF
Drive Servo/Motor Control,
BD6603KV
Audio Amp.,IR3R54N
Audio Amp.,IR3R59N
2.5V Regulator,62GR2522
Dual Transistor,HN1C01FU
Constant Current Drive,
FDC634P
P Channel Dual FET,FDG312P
DC/DC Converter,IR3M12N
Reset 2.35V Regulator,
XC66DS01
Power Drive,NDS331N
4.5V Regulator,62GR4522
VS2SA17457/-1
VSRN1104///-1
VSRT1P441U/-1
VSRT1N441U/-1
VSRN1444A//-1
VS2SC4738BL-1
VSRN1104///-1
VS2SA1873GR-1
VSRN1104///-1
J
J
J
J
J
J
J
J
J
AB
AB
AB
AB
AC
AC
AB
AC
AB
Silicon,PNP,2SA17457
Digital,NPN,RN1104
Digital,NPN,RT1P441 U
Digital,NPN,RT1N441 U
Digital,NPN,RN1444 A
Silicon,NPN,2SC4738 BL
Digital,NPN,RN1104
Silicon,PNP,2SA1873 GR
Digital,NPN,RN1104
VHDSBE803//-1
VHD1SS361//-1
VHDMA793///-1
VHE015Z5R1Y-1
VHE015Z5R1Y-1
VHD1SS360//-1
VHDF05J2L//-1
VHE015Z5R1Y-1
VHD1SS400//-1
VHDF05J2L//-1
VHE015Z2R7Z-1
VHDF10J2E//-1
VHDMA793///-1
VHDRB731U//-1
VHD1SS389//-1
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
AD
AB
AC
AD
AD
AB
AC
AD
AB
AC
AB
AC
AC
AC
AB
Silicon,SBE803
Silicon,1SS361
Silicon,MA793
Zener,5.1V,015Z5.1Y
Zener,5.1V,015Z5.1Y
Silicon,1SS360
Silicon,F05J2L
Zener,5.1V,015Z5.1Y
Silicon,1SS400
Silicon,F05J2L
Zener,2.7V,015Z2.7Z
Silicon,F10J2E
Silicon,MA793
Silicon,RB731U
Silicon,1SS389
TRANSISTORS
Q101
Q102
Q601
Q602
Q711
Q721
Q841
Q891
Q901
DIODES
D351
D431
D432
D491
D493
D800
D801
D802
D803,804
D805
D813
D821
D836
D841
D851
–1–
PARTS CODE
PRICE
RANK
DESCRIPTION
MD-MT831H/W
NO.
C753
C754
C758
C760
C763,764
C765,766
C771
C773
C774
C775
C800
C801
C805
C806
C807
C808
C821
C822
C823
C825
C826
C831
C833
C836~838
C841
C842
C851
C853
C854
C855
C856
C857
C858
C859
C861
C869
C871
C872
C891
C902
C905~907
C908
C909,910
C911
PRICE
RANK
PARTS CODE
VCKYCY1AF105Z
VCKYCY0JB105K
RC-KZ1184AFZZ
VCKYCY1CB104K
VCKYCY0JB105K
VCKYCY1AB224K
VCSATK0JJ476M
VCKYCY1AB224K
VCKYCY1AF105Z
VCKYCY1EB103K
VCKYCY0JB105K
VCKYCY1CB104K
VCEAPW0JW107M
RC-KZ1186AFZZ
VCKYCY1EB103K
VCKYCY0JB105K
VCCCCY1HH560J
VCCCCY1HH100D
VCKYCY1CB104K
VCKYTQ1CB225K
VCEAPW0GW227M
VCKYCY0JB105K
RC-KZ1205AFZZ
VCKYCY1CB104K
VCSAFA0JJ106M
VCKYCY0JB105K
VCKYCY1EB103K
VCCCCY1HH470J
VCKYCY1EB103K
VCCCCY1HH181J
RC-KZ1184AFZZ
VCKYTQ0JB106K
VCCCCY1HH470J
VCCCCY1HH271J
RC-KZ1184AFZZ
VCSATK0JJ476M
RC-KZ1228AFZZ
VCSATA1AJ106M
VCKYCY1AB474K
VCKYCY1EB103K
VCKYCY1HB222K
VCKYCY1AB224K
VCKYCY1CB273K
VCKYCY1CB104K
DESCRIPTION
1 µF,10V
1 µF,6.3V
1 µF,16V,Ceramic
0.1 µF,16V
1 µF,6.3V
0.22 µF,10V
47 µF,6.3V,Electrolytic,Tantalum
0.22 µF,10V
1 µF,10V
0.01 µF,25V
1 µF,6.3V
0.1 µF,16V
100 µF,6.3V,Electrolytic
3.3 µF,10V,Ceramic
0.01 µF,25V
1 µF,6.3V
56 pF (CH),50V
10 pF (CH),50V
0.1 µF,16V
2.2 µF,16V
220 µF,4.0V,Electrolytic
1 µF,6.3V
0.33 µF,10V
0.1 µF,16V
10 µF,6.3V,Electrolytic,Tantalum
1 µF,6.3V
0.01 µF,25V
47 pF (CH),50V
0.01 µF,25V
180 pF (CH),50V
1 µF,16V,Ceramic
10 µF,6.3V
47 pF (CH),50V
270 pF (CH),50V
1 µF,16V,Ceramic
47 µF,6.3V,Electrolytic,Tantalum
1 µF,10V
10 µF,10V,Electrolytic,Tantalum
0.47 µF,10V
0.01 µF,25V
0.0022 µF,50V
0.22 µF,10V
0.027 µF,16V
0.1 µF,16V
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
AB
AC
AC
AB
AC
AB
AD
AB
AB
AA
AC
AB
AD
AD
AA
AC
AA
AA
AB
AC
AD
AC
AB
AB
AD
AC
AA
AA
AA
AA
AC
AE
AA
AA
AC
AD
AC
AE
AC
AA
AA
AB
AA
AB
VRS-CY1JB000J
J
VRS-TV2AB000J
VRS-TV2AB5R6J
VRS-CY1JB223J
VRS-CY1JB122J
VRS-CY1JB123J
VRS-CY1JB224J
VRN-CY1JD124D
VRS-CY1JB824D
VRN-CY1JD124D
VRS-CY1JB824D
VRN-CY1JD563D
VRS-CY1JB394D
VRN-CY1JD563D
VRS-CY1JB394D
VRS-CY1JB393J
VRS-CY1JB394J
VRS-CY1JB122J
VRS-CY1JB102J
VRS-CY1JB683D
VRN-CY1JD273D
VRN-CY1JD681D
VRS-CY1JB105J
VRS-TV2AB100J
VRS-TQ2BB150J
VRN-CY1JD104D
VRS-CY1JB102J
VRS-CY1JB104J
VRS-CY1JB103J
VRS-CY1JB104J
VRS-CY1JB103J
VRS-CY1JB104J
VRS-CY1JB104J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
AA 0 ohm,Jumper,
0.8×1.55mm,Green
AA 0 ohm,Jumper,1.25×2mm,Green
AA 5.6 ohms,1/10W
AA 22 kohms,1/16W
AA 1.2 kohms,1/16W
AA 12 kohms,1/16W
AA 220 kohms,1/16W
AA 120 kohms,1/16W,1%,Metal Film
AA 820 kohms,1/16W
AA 120 kohms,1/16W,1%,Metal Film
AA 820 kohms,1/16W
AA 56 kohms,1/16W,1%,Metal Film
AA 390 kohms,1/16W
AA 56 kohms,1/16W,1%,Metal Film
AA 390 kohms,1/16W
AA 39 kohms,1/16W
AA 390 kohms,1/16W
AA 1.2 kohms,1/16W
AA 1 kohm,1/16W
AA 68 kohms,1/16W,1%
AA 27 kohms,1/16W,1%,Metal Film
AA 680 ohms,1/16W,1%,Metal Film
AA 1 Mohm,1/16W
AA 10 ohm,1/10W
AA 15 ohms,1/8W
AA 100 kohm,1/16W,1%,Metal Film
AA 1 kohm,1/16W
AA 100 kohm,1/16W
AA 10 kohm,1/16W
AA 100 kohm,1/16W
AA 10 kohm,1/16W
AA 100 kohm,1/16W
AA 100 kohm,1/16W
RESISTORS
L202
R101~104
R106
R111
R112
R131
R132
R133
R134
R135
R136
R137
R138
R139
R140
R161
R204
R205
R206
R207
R222
R351
R361
R402
R403
R404
R405
R406
R407
R408
R411
–2–
NO.
PARTS CODE
R412
R413~416
R422
R423
R424,425
R431
R492
R500
R501A,502A
R701,702
R703
R711,712
R713,714
R715,716
R717,718
R719,720
R723,724
R725
R726
R727
R728
R729,730
R754
R757
R758
R761
R762
R765,766
R800
R801
R802
R804
R805
R806
R808
R809
R810
R811,812
R813
R815
R816
R821
R823
R824
R825
R826
R831
R832
R838
VRS-CY1JB153J
VRS-CY1JB102J
VRS-CY1JB104J
VRN-CY1JD223D
VRS-CY1JB223J
VRS-CY1JB334J
VRS-CY1JB102J
VRS-CY1JB4R7J
VRS-CY1JB471J
VRS-CY1JB220J
VRS-CY1JB104J
VRS-CY1JB562J
VRS-CY1JB103J
VRS-CY1JB104J
VRS-CY1JB102J
VRS-CY1JB822J
VRS-CY1JB682J
VRS-CY1JB101J
VRS-CY1JB393J
VRS-CY1JB822J
VRS-CY1JB102J
VRS-CY1JB272J
VRS-CY1JB154J
VRS-CY1JB222J
VRS-CY1JB101J
VRS-CY1JB224J
VRS-CY1JB913J
VRS-CY1JB200J
VRS-TV2AB223J
VRN-CY1JD222D
VRS-CY1JB102J
VRN-CY1JD681D
VRS-CY1JB684D
VRN-CY1JD304D
VRS-CY1JB153J
VRS-CY1JB222J
VRS-CY1JB562J
VRN-CY1JD104D
VRN-CY1JD102D
VRN-CY1JD563D
VRN-CY1JD243D
VRS-CY1JB104J
VRS-CY1JB104J
VRN-CY1JD274D
VRS-CY1JB106J
VRN-CY1JD224D
VRN-CY1JD184D
VRN-CY1JD204D
VRS-CY1JB470J
PRICE
RANK
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
DESCRIPTION
15 kohms,1/16W
1 kohm,1/16W
100 kohm,1/16W
22 kohms,1/16W,1%,Metal Film
22 kohms,1/16W
330 kohms,1/16W
1 kohm,1/16W
4.7 ohms,1/16W
470 ohms,1/16W
22 ohms,1/16W
100 kohm,1/16W
5.6 kohms,1/16W
10 kohm,1/16W
100 kohm,1/16W
1 kohm,1/16W
8.2 kohms,1/16W
6.8 kohms,1/16W
100 ohm,1/16W
39 kohms,1/16W
8.2 kohms,1/16W
1 kohm,1/16W
2.7 kohms,1/16W
150 kohms,1/16W
2.2 kohms,1/16W
100 ohm,1/16W
220 kohms,1/16W
91 kohms,1/16W
20 ohms,1/16W
22 kohms,1/10W
2.2 kohms,1/16W,1%,Metal Film
1 kohm,1/16W
680 ohms,1/16W,1%,Metal Film
680 kohms,1/16W
300 kohms,1/16W,1%,Metal Film
15 kohms,1/16W
2.2 kohms,1/16W
5.6 kohms,1/16W
100 kohm,1/16W,1%,Metal Film
1 kohm,1/16W,1%,Metal Film
56 kohms,1/16W,1%,Metal Film
24 kohms,1/16W,1%,Metal Film
100 kohm,1/16W
100 kohm,1/16W
270 kohms,1/16W,1%,Metal Film
10 Mohm,1/16W
220 kohms,1/16W,1%,Metal Film
180 kohms,1/16W,1%,Metal Film
200 kohms,1/16W,1%,Metal Film
47 ohms,1/16W
MD-MT831H/W
NO.
PRICE
RANK
PARTS CODE
J703
QJAKM0205AFZZ
J
J801
M901
M902
M903
SW401
SW402
SW403
SW901(8-2)
QJAKC0146AFZZ
RMOTV0529AFZZ
RMOTV0530AFZZ
RMOTV0531AFM1
QSW-M9015AFZZ
QSW-S0948AFZZ
QSW-M9016AFZZ
————
J
J
J
J
J
J
J
DESCRIPTION
NO.
AH Jack,Remote Control/
Headphones
AE Jack,DC In
AS Motor Ass’y [Sled]
AS Motor Ass’y [Spindle]
AQ Motor Ass’y [Lift]
AD Switch,Push Type [Eject]
AC Switch,Slide Type [Hold]
AD Switch,Push Type [Lid Detection]
— Switch,Push Type [Disc Protect]
(Supplies at REF No.8)
MECHANICAL PARTS
1
2
3
4
5
6
7
8
8- 1
!
NGERH0597AFZZ
NSFTD0334AFZZ
LANGF1612AFM1
MARMM0172AFFW
LHLDX3144AFM1
LCHSM0948AFM1
PCUSG0599AFZZ
QPWBH0348AFM1
————
J
J
J
J
J
J
J
J
AC
AD
AF
AF
AT
AS
AB
AN
—
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
AD
AD
AE
AD
AE
AE
BM
AD
AC
AC
AG
AD
AN
AA
AA
AA
AB
AC
AC
AA
AA
AA
AA
AA
AA
AB
AS
AS
AQ
Wheel,Drive
Screw,Drive
Bracket,Magnetic Field Ass’y
Bracket,Magnetic Head
Cartridge Holder Ass’y
Main Chassis Ass’y
Cushion
Mechanism Flexible PWB Ass’y
Mechanism Flexible PWB
(Supplies at REF No.8)
Switch,Push Type [Disc Protect]
(Supplies at REF No.8)
Photo Interrupter,CPI100
(Supplies at REF No.8)
Lever,Eject
Spring,Bracket
Spring,Thrust Plate
Driver Screw Bracket
Gear,Drive
Spring,Magnetic Field
Optical Pickup Ass’y
Spring,Drive Grip
Shaft,Guide
Spring,Eject Lever
Lift Working Lever Ass’y
Lever,Lift
Magnetic Head
Screw,ø1.4×2.5mm
Screw,ø1.4×2.2mm
Screw,ø1.4×1.2mm
Screw,ø1.4×1.8mm
Screw,ø1.4×4.5mm
Screw,ø1.4×1.0mm
Screw,ø1.7×3mm
Screw,ø1.4×2.8mm
Screw,ø1.4×2.5mm
Washer,ø0.8×ø2.4×0.2mm
Screw,ø1.4×1.5mm
Washer,ø1.4×0.5mm
Screw,ø1.4×1.1mm
Motor Ass’y [Sled]
Motor Ass’y [Spindle]
Motor Ass’y [Lift]
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
J
AU
AS
AS
AU
AB
AB
AB
AB
AD
AB
AC
AM
AF
AB
AE
AD
AA
AE
AC
AH
AL
Top Cabinet
Bottom Cabinet [MD-MT831H]
Bottom Cabinet [MD-MT831W]
Main Frame Ass’y
Cushion
Sheet,Microphone Insulation
Sheet,Line Insulation
Sheet,Capacitor Insulation
Terminal,Rechargeable Battery,+
Terminal A,External
Terminal B,External
Center Cabinet A
Button,Eject
Cover,DC Jack
Junction Flexible PWB
Knob,Hold
PU Felt
Cover,Battery
Terminal,Rechargeable Battery,Decoration Plate
Button,Operation
8- 2(SW901)
————
—
8- 3(PH901)
————
—
9
10
11
12
13
14
15
16
17
18
19
20
21
501
502
503
504
505
506
507
508
509
510
511
512
513
M901
M902
M903
MLEVF2664AFFW
MSPRD1367AFFJ
MSPRP0959AFFJ
MSPRP0925AFFJ
NGERH0603AFZZ
MSPRP0958AFFJ
RCTRH8194AFZZ
MSPRP0922AFFJ
NSFTM0292AFFW
MSPRT1638AFFJ
MLEVF2662AFM1
MLEVF2663AFFW
RCILH0114AFZZ
LX-BZ0800AFZZ
LX-BZ0804AFFF
LX-BZ0823AFZZ
LX-BZ0959AFZZ
LX-BZ0997AFZZ
LX-BZ0998AFZZ
LX-JZ0148AFZZ
LX-JZ0154AFZZ
LX-JZ0158AFZZ
LX-WZ9290AFZZ
XSPSN14P01500
XWSSD14-05000
LX-BZ1004AFZZ
RMOTV0529AFZZ
RMOTV0530AFZZ
RMOTV0531AFM1
224
225
226
227
228
229
230
231
JKNBZ2212AFSA
JKNBZ2213AFSA
JKNBZ2214AFSA
JKNBZ2215AFSA
LANGT1979AFM1
LANGT1980AFM1
PFLT-1158AFZZ
PFLT-1163AFZZ
J
J
J
J
J
J
J
J
AF
AF
AF
AC
AH
AE
AB
AB
232
233
234
235
237
238
239
PSHET0462AFZZ
PSHEZ1097AFZZ
RUNTK0525AFZZ
RUNTZ0742AFZZ
PSHET0442AFZZ
PSHET0472AFZZ
PFLT-1157AFZZ
J
J
J
J
J
J
J
AB
AB
AS
AX
AC
AB
AB
240
241
242
247
248
249
250
251
253
PSHET0463AFZZ
PSHET0464AFZZ
PCUSS0784AFZZ
PFLT-1159AFZZ
PSHET0469AFZZ
GCABA2912AFSA
GCOVA2328AFSA
LHLDZ1777AFSA
PSHEZ1143AFZZ
J
J
J
J
J
J
J
J
J
AB
AB
AB
AB
AB
AH
AC
AC
AB
255
256
258
259
PSHEZ1138AFZZ
PSHEZ1139AFZZ
PCUSS0787AFZZ
PSPAZ0594AFZZ
J
J
J
J
AC
AC
AB
AC
260
261
262
263
601
602
603
604
605
TLABS0507AFZZ
TLABS0508AFZZ
PFLT-1160AFZZ
PSHET0473AFZZ
LX-BZ1008AFFC
LX-BZ0805AFFN
LX-BZ0966AFFC
LX-BZ1005AFFW
LX-BZ1006AFFW
J
J
J
J
J
J
J
J
J
AD
AD
AB
AB
AB
AB
AB
AB
AB
GFTAC3160AFM1
GCABD4419AFSA
GCABD4420AFSA
LHLDZ3192AFM1
PCUSG0693AFZZ
PSHET0455AFZZ
PSHET0456AFZZ
PSHET0457AFZZ
QTANB9412AFFQ
QTANZ9176AFFQ
QTANZ9177AFFQ
GCABA2911AFSA
JKNBZ2216AFSA
GCOVA2329AFSA
QPWBH0349AFZZ
JKNBZ2217AFSA
PFLT-1127AFZZ
GFTAB1372AFSA
QTANB9413AFFQ
HDECQ0607AFSA
JKNBZ2210AFSA
DESCRIPTION
Button,Play
Button,Record Level
Button,Volume
Button,Record
Bracket,Display
Bracket Fitting Ass’y
Sheet,LCD Flexible Insulation
Sheet,LCD Flexible PWB
Protection
Sheet,Key Flexible Insulation
Sheet,Bracket Fitting
Key Flexible PWB Ass’y
LCD Ass’y
Insulation Sheet,Bottom Cabinet
Sheet,Junction Insulation
Sheet,Head Flexible PWB
Insulation
Sheet A,Jack PWB Insulation
Sheet B,Jack PWB Insulation
Cushion,LCD
Sheet,Key Flexible PWB Holder
Sheet,Play
Center Cabinet B
Cover,External Terminal
Cover,Terminal,+
Sheet,Microphone Jack
Insulation
Sheet,External Terminal
Sheet,Terminal,+
Cushion,Driver
Spacer,Top Cabinet Fulcrum
Bracket Fitting
Label,Laser Caution
Label,Laser Mark
Felt
Sheet, Flexible PWB
Screw,ø1.4×2mm
Screw,ø1.7×2.5mm
Screw,ø1.4×1.5mm
Screw,ø1.4×12.5mm
Screw,ø1.4×8.6mm
ACCESSORIES/PACKING PARTS
!
RADPA6435AFZZ
J
!
RADPA5402AFZZ
J
!
RADPA7486AFZZ
J
!
RADPA8493AFZZ
J
SPAKC6953AFZZ
SPAKZ0537AFZZ
J
J
SPAKZ0539AFZZ
J
SPAKZ0541AFZZ
J
TGANE1220AFZZ
J
TINSE1220AFZZ
J
TINSZ1407AFZZ
J
TINSZ1408AFZZ
J
TLABG0527AFZZ
J
TLABM0671AFZZ
J
TLABN1578AF01
J
TLABN1579AF01
J
CABINET PARTS
201
202
202
203
204
205
206
207
211
212
213
214
215
216
217
218
219
220
221
222
223
PRICE
RANK
PARTS CODE
–3–
BG AC Adapter [MD-MT831W for
Australia/New Zealand]
BF AC Adapter [MD-MT831W
Except for Hong Kong/
Australia/New Zealand]
AY AC Adapter
[MD-MT831H for Europe]
BH AC Adapter
[MD-MT831W for Hong Kong
AM Packing Case [MD-MT831W]
Pad,AC Adapter
[MD-MT831H for Europe]
Pad,AC Adapter
[MD-MT831W for Hong Kong/
Australia/New Zealand]
Pad,AC Adapter [MD-MT831W
Except for Hong Kong/
Australia/New Zealand]
AB Guarantee Card
[MD-MT831W for Australia/
New Zealand]
Operation Manual
[MD-MT831W for Australia/
New Zealand]
AR Operation Manual
[MD-MT831H for Europe]
AR Operation Manual [MD-MT831W
Except for Australia/
New Zealand]
AC Label,Hong Kong [MD-MT831W
for Hong Kong Only]
AC Label,Feature
[MD-MT831H for Europe Only]
Label,Serial No.Packing Case
[MD-MT831H for Europe]
Label,Serial No.
[MD-MT831H for Europe]
MD-MT831H/W
NO.
!
PRICE
RANK
PARTS CODE
TLABN1581AF01
J
TLABN1582AF01
J
TLABN1583AF02
J
TLABS0478AFZZ
J
1
2
2- 1
3
4
5
6
GCASZ0090AFSA
RPHOH0176AFZZ
PCAPH8107AFZZ
UBNDT0086AFSA
UBATI0088AFSA
RRMCW0051AFSB
SPAKZ0541AFZZ
J
J
J
J
J
J
J
7
RADPA8487AFZZ
J
8
9
10
QCNWG0382AFZZ J
SPAKA2748AFZZ J
TINSE1652AFZZ
J
11
SPAKZ0475AFZZ
J
12
13
14
UBAGC0083AFSA
SPAKC6952AFZZ
TLABN1580AF01
J
J
J
15
16
QCNWG0422AFZZ J
TCADS0085AFZZ J
17
TINSE1654AFZZ
J
18
TLABN1578AF02
J
DESCRIPTION
NO.
AC Label,Serial No.
[MD-MT831W for Hong Kong]
AC Label,Serial No. [MD-MT831W
Except for Hong Kong/
Australia/ New Zealand]
Label, Serial No.
[MD-MT831W for Australia/
New Zealand]
AC Label,CPA [MD-MT831W Except
for Hong Kong]
AW Battery Case
AR Headphones
AD Cap,Headphones
AF Handstrap
BD Rechargeable Battery
BC Remote Control
Pad,AC Adapter
[MD-MT831H for U.K.]
BC AC Adapter
[MD-MT831H for U.K.]
AK Connecting Cord,RCA Type
AD Packing Add.,Accessories
AH Operation Manual
[MD-MT831H for U.K.]
AD Spacer,Operation Manual
[MD-MT831H for U.K.Only]
AH Carrying Case
AM Packing Case [MD-MT831H]
AC Label,Serial No.
[MD-MT831H for U.K.]
AQ Connecting Cord,Optical Type
AD Service Card
[MD-MT831H for U.K.Only]
AE Quick Guide
[MD-MT831H for U.K.Only]
AB Label,Serial No.Packing Case
[MD-MT831H for U.K.]
P.W.B. ASSEMBLY (Not Replacement Item)
PWB-A1,2
DHAIK3132AF01
J
—
Main/Jack (Combined Ass’y)
[Except for Europe]
OTHER SERVICE PARTS
UDSKM0001AFZZ
88GMMD-110
J
J
88GMMD-213A
J
AZ Recording Mini Disc
BV High Reflection Disc MMD-110
(TEAC Test MD)
BT Low Reflection Disc MMD-213A
(TEAC Test MD)
–4–
PARTS CODE
PRICE
RANK
DESCRIPTION
MD-MT831H/W
504
502
512
3
A
506
509
511
14
8
10
8-3
(PH901)
4
501
B
8-1
17
21
16
503
2
513x2
8-2(SW901)
12
1
C
503x2
508x3
510
15
507
M902
D
13
11
7
M901
9
6
E
505
M903
19
F
5
G
20
H
18
1
2
3
4
Figure 5 MD MECHANISM EXPLODED VIEW
–5–
5
6
MD-MT831H/W
239
MD MECHANISM
A
249
222
B
214
601x2
601x2
605
215
220
201
260
259
C
204
601x2
204
238
204
207
604
204
205
203
D
233
253
251
242
258
250
PWB-A2
241
206
239
229
217
226
221
227
225
E
232
224
213
212
240
263
211
212
223
PWB-A1
234
255
256
247
248
262
F
262
247
602
237
219
258
235
231
601x2
261
216
601
G
603
230
601x2
228
218
603
H
202
1
2
3
4
Figure 6 CABINET EXPLODED VIEW
–6–
5
6
MD-MT831H/W
PACKING METHOD (MD-MT831H FOR U.K. ONLY)
Setting position of switches and knobs
UNIT
HOLD
OFF
Remote Control
HOLD
CANCEL
5
8
1
2
4
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
18.
Battery Case
Headphones
handstrap
Rechargeable Battery
Remote Control
AC Adapter Pad
AC Adapter
Connecting Cord, RCA Type
Packing Add., Accessories
Operation Manual
Operation Manual Spacer
Carrying Case
Packing Case
Serial No. Label
Connecting Cord, Optical Type
Service Card
Quick Guide
Serial No. Label, Packing Case
GCASZ0090AFSA
RPHOH0176AFZZ
UBNDT0086AFSA
UBATi0088AFSA
RRMCW0051AFSB
SPAKZ0541AFZZ
RADPA8487AFZZ
QCNWG0382AFZZ
SPAKA2748AFZZ
TiNSE1652AFZZ
SPAKZ0475AFZZ
UBAGC0083AFSA
SPAKC6952AFZZ
TLABN1580AF01
QCNWG0422AFZZ
TCADS0085AFZZ
TiNSE1654AFZZ
TLABN1578AF02
10
3
7
12
15
17
16
9
6
11
14
18
13
COPYRIGHT
©
1999 BY SHARP CORPORATION
ALL RIGHTS RESERVED.
No part of this publication may be reproduced,
stored in a retrieval system, or transmitted in
any from or by any means, electronic, mechanical,
photocopying, recording, or otherwise, without
prior written permission of the publisher.
SHARP CORPORATION
Communication Systems Group
Quality & Reliability Control Center
Higashihiroshima, Hiroshima 739-0192, Japan
Printed in Japan
A9911-3264NS•HA•J
SG • SK • EX