Sharp MD-X8 User manual

– 1 –
MD-X8
CONTENTS
MD-X8
SERVICE MANUAL
SHARP CORPORATION
No. S0778MDX8////
• In the interests of user-safety the set should be restored to its original
condition and only parts identical to those specified should be used.
This document has been published to be used
for after sales service only.
The contents are subject to change without notice.
Page
IMPOTANT SERVICE MANUAL........................................................................................................................................ 2
SPECIFICATIONS ............................................................................................................................................................. 2
NAMES OF PARTS ........................................................................................................................................................... 3
OPERATION MANUAL ...................................................................................................................................................... 5
QUICK GUIDE ................................................................................................................................................................... 7
DISASSEMBLY.................................................................................................................................................................. 8
REMOVING AND REINSTALLING THE MAIN PARTS................................................................................................... 12
ADJUSTMENT ................................................................................................................................................................. 15
NOTES ON SCHEMATIC DIAGRAM .............................................................................................................................. 31
TYPE OF TRANSISTOR AND LED ................................................................................................................................. 31
WIRING DIAGRAM .......................................................................................................................................................... 32
BLOCK DIAGRAM ........................................................................................................................................................... 34
SCHEMATIC DIAGRAM / WIRING SIDE OF P.W.BOARD............................................................................................. 38
VOLTAGE ........................................................................................................................................................................ 68
WAVEFORMS OF CD CIRCUIT...................................................................................................................................... 69
WAVEFORMS OF MD CIRCUIT ..................................................................................................................................... 70
TROUBLESHOOTING (CD SECTION) ........................................................................................................................... 72
TROUBLESHOOTING (MD SECTION) ........................................................................................................................... 76
FUNCTION TABLE OF IC................................................................................................................................................ 81
REPLACEMENT PARTS LIST/EXPLODED VIEW/PACKING OF THE SET
It is the intent of Sharp that this product be used in full compliance
withthecopyrightlawsoftheUnitedStatesandthatpriorpermission
be obtined from copyright owners whenever necessary.
US and foreign patents licensed from Dolby Laboratories Licensing
Corporation.
SRS technology licensed from SRS Labs. SRS technology holds
the following patents: U.S. Patent No. 4,748,669, U.S. Patent No.
4,841,572.
, the SRS Logo and the
are registered trademarks of SRS Labs, Inc.
US and foreign patents licensed from Dolby Laboratories Licensing
Corporation.

MD-X8
– 2 –
SPECIFICATIONS
FOR A COMPLETE DESCRIPTION OF THE OPERATION OF THIS UNIT, PLEASE REFER
TO THE OPERATION MANUAL.
Specifications for this model are subject to change without
prior notice.
IMPORTANT SERVICE NOTES
BEFORE RETURNING THE AUDIO PRODUCT
(Fire & Shock Hazard)
Before returning the audio product to the user, perform the following
safety checks.
1. Inspect all lead dress to make certain that leads are not pinched
or that hardware is not lodged between the chassis and other
metal parts in the audio product.
2.Inspectallprotectivedevicessuchasinsulatingmaterials,cabinet,
terminal board, adjustment and compartment covers or shields,
mechanical insulators etc.
3. To be sure that no shock hazard exists, check for leakage current
in the following manner.
* Plug the AC line cord directly into a 120 volt AC outlet.
* Usingtwoclipleads,connecta1.5kohm,10wattresistorparalleled
by a 0.15µF capacitor in series with all exposed metal cabinet
parts and a known earth ground, such as conduit or electrical
ground connected to earth ground.
* Use a VTVM or VOM with 1000 ohm per volt, or higher, sensitivity
tomeasuretheACvoltagedropacrosstheresistor(Seediagram).
* Connect the resistor connection to all exposed metal parts having
areturnpathtothechassis(antenna,metalcabinet,screwheads,
knobs and control shafts, escutcheon, etc.) and measure the AC
voltage drop across the resistor.
All check must be repeated with the AC line cord plug connection
reversed.
Any reading of 0.3 volt RMS (this corresponds to 0.2 milliamp. AC.)
or more is excessive and indicates a potential shock hazard which
must be corrected before returning the audio product to the owner.
TO EXPOSED
METAL PARTS
CONNECT TO
KNOWN EARTH
GROUND
TEST PROBE
0.15 µ F
1.5k ohms
10W
VTVM
AC SCALE
(General)
Power source: AC 120 V, 60 Hz
Power consumption: 135 W
Output power: 40 watts minimum RMS per
channel into 6 ohms from 60 Hz to
20 kHz,10 % total harmonic distortion
Input terminals: AUX 1 (Analog); 500 mV/47 kohms
AUX 2 (Analog); 500 mV/47 kohms
AUX DIGITAL 1 (Optical)
AUX DIGITAL 2 (Coaxial)
PHONO; 3 mV/47 kohms
Output terminals: Headphones; 16- 50 ohms
(recommended; 32 ohms)
Speakers; 6 ohms
AUX (Analog); 2.0 V (1 kohm)
Dimensions: Width; 9-1/2" (240 mm)
Height; 11-7/16"(290 mm)
Depth; 12-1/2" (317 mm)
Weight: 18.1lbs. (8.2 kg)
Speaker section
Type: 2-way 6" (150 mm) woofer and 1" (25
mm) dome tweeter type
Maximum input power: 100 W
Rated input power: 50 W
Impedance: 6 ohms
Dimensions: Width; 7-13/16" (197 mm)
Height; 11-3/4"(297 mm)
Depth; 11-1/16"(281 mm)
Weight: 9.7lbs. (4.4 kg)/each
Main unit section
(MiniDisc recorder section)
Type: MiniDisc recorder
Signal readout: Non-contact, 3-beam semi-conductor
laser pick-up
Audio channels: Stereo 2 channels/monaural (long-play
mode) 1 channel
Frequency response: 20 - 20,000 Hz (+1/-3 dB)
Rotational speed: 400 - 900 rpm CLV, Approx.
Quantization: 16-bit linear
Filter: 8-times oversampling digital filter
Error correction: ACIRC (Advanced Cross Interleave
Reed-Solomon Code)
Coding: ATRAC (Adaptive TRansform Acoustic
Coding)
Recording method: Magnetic modulation overwrite method
D/A converter: 1-bit
Sampling frequency: 44.1 kHz
Wow and flutter: Unmeasurable
(less than 0.001% W. peak)
Signal/noise ratio: 95 dB (1 kHz)
Dynamic range: 90 dB (1 kHz)
(Compact disc player)
Type: 3 disc multi-play compact disc player
Signal readout: Non-contact, 3-beam semi-conductor
laser pickup
Rotational speed: 200 - 500 rpm CLV, Approx.
Error correction: CIRC (Cross Interleave Reed-Solomon
Code)
Quantization: 16-bit linear
D/A converter: 1-bit
Filter: 4-times oversampling digital filter
Frequency response: 20 - 20,000 Hz (+1/-3 dB)
Signal/noise ratio: 95 dB (1 kHz)
Dynamic range: 90 dB (1 kHz)
Wow and flutter: Unmeasurable
(less than 0.001% W. peak)
(Tuner section)
Frequency range: FM; 87.5 - 108 MHz
AM; 530 - 1,720 kHz
Sensitivity: FM; 2.5 µV (75 ohms, unbalanced)
AM; 650 µV/m

– 3 –
MD-X8
NAMES OF PARTS
FRONT PANEL
1.Power Button: POWER
2.Remote Control Sensor
3.MD
MD Edit Button: MD
MD
4.CD Track Select Button: TRACK
5.Personal Computer Mode Indicator
6.LCD Display
7.Name / TOC-Edit Button: NAME/TOC EDIT
8.Auxiliary Input (Digital/Analog / Phono) Button: AUX
9.Tuner Call (Band Select) Button: TUNER (BAND)
10.3D Surround Indicator
11.CD Disc Trays
12.Headphones Jack: PHONES
13.MD Edit/Auxiliary 1 (Analog) Input Jack: MD IN/AUX1
14.Auxiliary Input Level (Analog) Control: INPUT LEVEL
15.Microphone Jack: MIC
16.Microphone Input Level Control: MIC VOL
17.Personal Computer Connect Jack: PC CNT
18.Keyboard Connect Jack: KEYBOARD
19.CD Open / Close Buttons:
20.CD Play Buttons: PLAY 1-3
21.MD Compartment
22.MD Indicator
23.CD Edit Button: CD MD
24.Record Button and Indicator
25.Computer Network Button
26.MD Eject Button:
27.MD Play/Pause Button and Indicator:
28.MD Stop Button :
29.Volume Control: VOLUME
30.3D Surround Button: 3D SURROUND
31.Extra Bass Button: X-BASS
32.Equalizer Button: EQUALIZER
33.Timer/Delete Button: TIMER / DELETE
34.Multi Control Button: MULTI CONTROL
35.Display Button: DISPLAY
36.Enter Button: ENTER
37.Tuning Up-Down/Cursor Buttons:
38.Message Button: MESSAGE
39.CD Play/Pause Button and Indicator:
40.CD Stop Button:
REAR PANEL
1.AM Antenna Terminal
2AM Antenna Ground Terminal
3.FM Antenna Terminal
4.FM Antenna Ground Terminal
5.Analog Output Jacks
6.AUX2 (Analog) Input Jacks
7.Phono Input Jacks
8.Phono Ground Terminal
9.Reset Button
10.Auxiliary Digital 1 Input Jack (Optical)
11.Auxiliary Digital 2 Input Jack (Coaxial)
12.Speaker Terminals
1
2
3
4
5
6
7
8
9
10
11
12
28
29
30 31
32 33
34 35
37
39
36
38
40
21
13 14 15 16 171819 20
22 23 24 25 26 27
POWER MD/CD STEREO MD-X8
MD MD CD MD
CD / MD MD EDIT
TRACK
VOLUME
3D SURROUND
X-BASS
NAME/
TOC EDIT TIMER/ DELETE DISPLAY
MESSAGEAUXTUNER
DISC-1
DISC-2
DISC-3
PHONES MD IN/AUX1 INPUT LEVEL MIC MIC VOL PC CNT KEYBOARD
(BAND)
TUNING / CURSOR
EQUALIZER
ENTER
1 2 3
PLAY
1
2
3
MULTI CONTROL
DOWN UP
REC
1
2
3
4
5
6
7
8
9
12
ANALOG IN/OUT
PHONO
AUX DIGITAL IN
RESET
RIGHT LEFT
RIGHT
GND
LEFT
RIGHT
RATED SPEAKER
IMPEDANCE : 6 OHMS
LEFT
OUT
AM
GND
GND
FM
75 OHMS
AUX 2
IN
DIGITAL 1
OPTICAL
DIGITAL 2
COAXIAL
ANTENNA
SPEAKERS
10
11

MD-X8
– 4 –
REMOTE CONTROL
1.Record Mode Button: REC MODE
2.Record Button:
3.Clear Button: CLEAR
4.Program Button: PRGM
5.Play Mode Button: P-MODE
6.Synchro Record Button: SYNCHRO REC
7.Auto Mark Button: AUTO MARK
8.Time Display Select Button:TIME
9.Auxiliary Input (Digital/Analog / Phono) Button: AUX
10.Tuner Preset/CD/MD Track Number Input Buttons
11.Remote Control Transmitter Window
12.3D Surround On/Off Button: SURROUND ON/OFF
13.Pre-Equalizer Button: PRE-EQ
14.Extra Bass Button: X-BASS
15.Volume / 3D Surround Button: VOLUME / 3D SURROUND
16.Wide/Center Button: WIDE/CENTER
17.Power Button: POWER
18.MD Stop Button:
19.MD Play/Pause Button:
20.Tuner Stereo Button: ST
21.Tuner Band Button: BAND
22.Display Button: DISPLAY
23.Name/TOC-Edit Button: NAME/TOC EDIT
24Tuning Up-Down/Cursor Buttons:
25.Enter Button: ENTER
26.Multi Control Button
27.Message Button: MESSAGE
28.Timer/Delete Button: TIMER/DELETE
29.CD Play Buttons: Play 1- 3
30.CD Play/Pause Button:
31.CD Stop Button:
SPEAKER
1.Dome Tweeter
2.Woofer
3.Speaker Terminals
4.Speaker Duct
1
11
12
13
14
15
16
17
18
19
20
21
2
3
4
8
9
10
22
23
24
25
26
27
28
29
30
31
56 7
VOLUME/
3D SURROUND
POWER
MD TUNER CD PLAY
12
ST BAND 3
PRGM CLEAR P-MODE TIME
> 10
54321
10/09876
REC REC
MODE AUTO
MARK AUX
SYNCHRO
REC
1
23
4

– 5 –
MD-X8
OPERATION MANUAL
SETTING THE CLOCK
When you have set the date and time, this unit can be used as a clock. It can be used for timer recording or for timer playback. It is also used to store the MD recording date in memory. 1
Turn the power on.
2
Press the TIMER/DELETE button.
3
Within10seconds,pressthe or ontheMULTICONTROL
button to select TIME ADJUST.
4
Within 10 seconds, press the ENTER button.
The unit will enter the date setting mode.
5
Press the 1or 0 on the MULTI CONTROL button to adjust
the year.
Press the button once to increase or decrease the year by one. Keep pressing it to advance continuously. For any year after 2000, use "00" for 2000, "01" for 2001, and so on.
6
Press the on the MULTI CONTROL button to select the
month.
7
Pressthe or ontheMULTICONTROL buttontoadjust the
month.
8
Pressthe ontheMULTICONTROLbuttontoselecttheday.
9
Pressthe or ontheMULTICONTROLbuttontoadjustthe
day.
10
Press the on the MULTI CONTROL button to select the
hour.
11
Pressthe or ontheMULTICONTROLbuttontoadjustthe
hour.
On the display, midnight is shown as "AM 12:00" and noon is shown as "PM 12:00". When setting the time, be careful to set AM or PM according to the current time.
12
Press the on the MULTI CONTROL button to select the
minute.
13
Pressthe or ontheMULTICONTROLbuttontoadjustthe
minute.
14
Press the ENTER button to start the clock at the top of the minute.
The clock starts operating.
Notes:
In the event of a power failure or when the AC power cord is disconnected, the clock setting will be lost. Reset the time. While recording an MD, you cannot set the date and clock. Be sure to set the date and clock before recording. The range of dates that can be entered is from July 1, 1997 to December 31, 2049.
To change the setting
After performing steps 1 - 4 above,
➀
Press the or on the MULTI CONTROL button to select
the item (YEAR, MONTH, DAY or CLOCK) you want to change.
➁
Press the or on the MULTI CONTROL button to change
the setting.
➂
Press the ENTER button.
To check the time When the power is off, the time appears on the display. WhenthepowerisonandyoupresstheTIMER/DELETEbutton, the time will appear for about 10 seconds on the display.
The year, month and day will not be displayed.
TIMER/
DELETE
ENTER
MULTI CONTROL
2
3
4 5 6 7 8
9
10 11 12 13 14
TIMEWADJUST
SLEEPWSET
TIMERWSET
TIMEWADJUST
SLEEPWSET
TIMERWSET
CLOCKWWWWW amW0:00 DAYWWWWWWW27WWWWW
MONTHWWWWW09WWWWW
YEARWWWWW '98WWWWW
CALENDARW&WCLOCK
CLOCKWWWWW amW0:00 DAYWWWWWWW27WWWWW
MONTHWWWWW09WWWWW
YEARWWWWW '98WWWWW
CALENDARW&WCLOCK
CLOCKWWWWW amW9:00 DAYWWWWWWW27WWWWW
MONTHWWWWW09WWWWW
YEARWWWWW '98WWWWW
CALENDARW&WCLOCK
CLOCKWWWWW amW9:00 DAYWWWWWWW27WWWWW
MONTHWWWWW09WWWWW
YEARWWWWW '98WWWWW
CALENDARW&WCLOCK
CLOCKWWWWW amW9:35 DAYWWWWWWW27WWWWW
MONTHWWWW ' 09WWWWW
YEARWWWWW '98WWWWW
CALENDARW&WCLOCK
MDLNODDISCWCLOCK
W W
W
CLOCKWWWWW am : DAYWWWWWWW01WWWW
MONTHWWWWW01WWWW
YEARWWWWW '99WWWW
CALENDARW&WCLOCK
000
CLOCKWWWWW am : DAYWWWWWWW01WWWW
MONTHWWWWW01WWWW
YEARWWWWW '98WWWW
CALENDARW&WCLOCK
000
CLOCKWWWWW am : DAYWWWWWWW01WWWW
MONTHWWWWW01WWWW
YEARWWWWW '98WWWW
CALENDARW&WCLOCK
000
CLOCKWWWWW am : DAYWWWWWWW01WWWW
MONTHWWWWW09WWWW
YEARWWWWW '98WWWW
CALENDARW&WCLOCK
000
CLOCKWWWWW am : DAYWWWWWWW01WWWW
MONTHWWWWW09WWWW
YEARWWWWW '98WWWW
CALENDARW&WCLOCK
000
MINIDISC SYSTEM LIMITATIONS
Even if the maximum recording time of a MiniDisc is not When the number of tracks used reaches the limit, regardless of the remainder being reached, “DISC FULL” or “TOC FULL” may be displayed. recordingtime,furtherrecordingwillbeimpossible. (Maximumnumberoftracks:255)
Even if the number of tracks and the recording time have When emphasis information (equalizer treatment in the treble section) in a track reached the limit, “DISC FULL” may be displayed. switches on/off many times, each change is assumed to be the beginning of a new
track, which will quickly use up all available track numbers, making further recording impossible, regardless of the remaining time, recording time or the number of tracks
on the original.
Even if several short tracks are erased, the remaining When the remaining recording time of a disc is displayed, short tracks less than 12
recording time may not show an increase. seconds long may not be included in the total.
Two tracks may not be combined in editing. For MiniDiscs which repeated recording and editing operations were performed, the
COMBINE function may not work.
The total of the recorded time and time remaining on a disc A cluster (about 2 seconds) is normally the minimum unit of recording. So, even if a may not add up to the maximum possible recording time. track is less than 2 seconds long, it will use about 2 seconds of space on the disc.
Therefore,thetimeactuallyavailableforrecordingmaybelessthantheremainingtime displayed. If there are scratches on a disc, those sections will be automatically avoided (no recording will be placed in those sections). Therefore, recording time will be
reduced.
(Continued) RESETING THE MICROCOMPUTER
If a problem occurs
If subjected to any strong external interference (mechanical shock, excessive static electricity, abnormal supply voltage due tolightning,etc.),or ifit isoperatedincorrectly,orifanMDcannot be removed, this product or the display may become damaged.
1
Unplug the AC power cord from the AC outlet.
2
PresstheRESETbuttononthebackoftheunitforatleast10seconds.
3
Plug the AC power cord back into the AC outlet. WhenthzeRESETbuttonispressed,allofthesettingsinmemorywill be erased. Ifstrangesounds,smellsor smoke comeout of the unit, or ifa foreign objectfalls intothe unit, turnoff thepower,unplug theACpower cord from the AC outlet immediately. Contact an authorized sharp serv- ices.
RESET button

MD-X8
– 6 –
REMEDY • Insert properly. • Replace the batteries. • Operateitwithina rangeof 8" (0.2m) to20' (6m)
andwithinanangleof15°toeithersideofcenter.
• Connect the AC power cord.
REMEDY • Try setting it again. • Turn the power off and on again, and then retry
the operation.
• Connect the wires securely. • Disconnect the AC power cord, and connect it
again.
• Increase the volume level. • Disconnect the headphones. • It is recommended that you use an outdoor an-
tenna.
If a problem occurs
If this unit functions abnormally during operation, first check the following items. If the unit continues to function abnormally, or if an abnormality appears other than listed below, turn off the player’s power and disconnect the AC power plug, then consult your SHARP dealer or service personnel. General
SYMPTOM • The clock is wrong. • When a button is pressed, the unit
does not respond.
• No sound is heard.
• Radios make unusual noise or the
picture on the TV screen is distorted.
CD playback
SYMPTOM • Eventhougha dischasbeenloaded,
“NODISC”or “ERROR”isdisplayed.
• Playback stops in the middle of a
track, or playback is not performed properly. • Playback sounds are skipped.
MD recording and playback SYMPTOM • A recording cannot be made. • Eventhougha dischasbeenloaded,
“NODISC”or“ERROR” isdisplayed.
• Playback sounds are skipped.
Radio reception SYMPTOM • Radiosmakeunusualnoiseconsecu-
tively.
• Thepresetchannelcannot becalled. Remote control SYMPTOM • Theremote controldoes notfunction
or does not operate properly.
• The power cannot be turned on from
the remote control.
POSSIBLE CAUSE • Did a power failure occur? –– • Are the speaker wires disconnected? • Are the speaker wires shorted? • Is the volume level set to "0" ? • Are the headphones connected? • When a radio or TV which uses an indoor an-
tenna is placed near the unit, the picture on the TVscreenmay bedistortedortheradiomay not function properly.
POSSIBLE CAUSE • The disc is loaded upside down. • The disc is very dirty. • The disc which does not satisfy the standards. • Is the unit located near excessive vibrations? • Has condensation formed inside the unit?
REMEDY
• Load the disc with the correct side up. • Clean the disc. • Load the correct disc. • Place the unit on a firm, level surface free from
vibration.
• Removethe discandleave thepowerturned on.
Theunitshouldfunctionproperlyinabout1hour.
POSSIBLE CAUSE • IstheMiniDiscprotectedagainstaccidentalerasure? • Did you try to record on a playback-only MiniDisc? • Can you see the “TOC FULL” message in the dis
play?
• The disc is very dirty. • Is the unit located near excessive vibrations? • Has condensation formed inside the unit?
REMEDY • Slidetheaccidentalerase preventiontab back to
its original position.
• Replace it with a recordable disc. • Put in another recordable disc with recording
space on it.
• Clean the disc. • Place the unit on a firm, level surface free from
vibration.
• Removethe discandleave thepowerturned on.
Theunitshouldfunctionproperlyinabout1hour.
POSSIBLE CAUSE • The unit is placed near the TV or computer. • The antenna direction is not placed properly. • Did a power failure occur?
REMEDY • Place the unit apart from the noise. • Correct the antenna direction. • Preset the channel again.
TROUBLESHOOTING
POSSIBLE CAUSE • The batteries (polarity) are not inserted properly. • The batteries inside the remote control are dead. • The remote control is operated from an incorrect
distance or angle.
• Is the AC power cord plugged in?
(Continued)
When an error message is displayed, proceed as follows:
Error messages Meaning Remedy BLANK MD • Nothing is recorded. • Replace the disc with a recorded disc. Can’t ACCESS • The unit cannot access the personal computer. • Make sure the sound card is plugged in correctly.
• While MD MDEDIT, incorrect digital signals are input • Make sure the personal computer is operating normally. from the portable MD. • Make sure the cable is connected correctly and the portable MDs power
is on.
Can’t COPY • No copy can be made because of the SCMS copyright system. • Record using the analog cable. Can’t EDIT • A track cannot be edited. • Change the stop position of the track and then try editing it. Can’t REC • Recording cannot be performed correctly due to vibration. • Rerecord or replace it. DEFECT • Since this disc has scratches on it, the recording operation • Replace the disc with another recordable disc.
was skipped.
CH ERROR • The CD changer doesn’t work well. • Turn off the power, and disconnect the AC power cord from
the AC outlet.Then connect the AC power cord, and turn on the power again.
CONNECT ERR • While MD MD EDIT, incorrect digital signals are input • Make sure the cable is connected correctly and the portable
from the portable MD player. MD turns on the power.
Din UNLOCK • Incorrect digital signals are input. • Connect correct digital signals.
• Use the analog input jack.
DISC ERR* • The disc is damaged. • Reload the disc or replace it.
• The TOC information is not recorded on the disc.
DISC FULL • The disc is out of recording space. • Replace the disc with another recordable disc. EDIT OVER • There is no space left for recording CD. • Replace it with another recordable disc. FOCUS ERROR • A disc has not been loaded. • Reload the MiniDisc.
• The disc data cannot be read.
MD ERROR • Trouble is found. • Contact a Sharp Authorized Servicing Dealer or Sharp
Authorized Service station.
MECHA ERR* • There is a mechanical problem and the disc is not working • Turn off the power, and press the 7button.
properly.
NAME FULL • The number of characters for the disc name or track name • Shorten the disc or track name.
exceeds 40.
NO DISC • A MiniDisc has not been loaded. • Load a MiniDisc.
• MiniDisc data cannot be read. • Reload the MiniDisc.
NOT AUDIO • The data recorded on this disc is not audio data. • Select another track.
• Replace the MiniDisc.
PLAYBACK MD • You tried to record on a playback-only disc. • Replace it with a recordable MiniDisc.
• The disc and track names cannot be moved on playback discs. • Edit only the sound.
PROTECT • Trouble is found. • Restart the unit. If the unit doesn't work, contact a Sharp
Authorized Servicing Dearer or Sharp Authorized Service station.
PROTECTED • The MiniDisc is write protected. • Move the write protection tab back to its original position. TEMP OVER • The temperature is too high. • Turn off the power, and wait for a while. TOC ERR* • The disc has a large amount of damage. • Replace the disc with another disc. TOC FULL* • There is no space left for recording character information • Replace it with another recordable disc.
(track names, disc names, etc.).
TOC W ERROR • Trouble is found. • Contact a Sharp Authorized Servicing Dealer or Sharp
Authorized Service station.
TRAY ERROR • The disc tray for CD doesn't work well. • Turn off the power, and disconnect the AC power cord from
the AC outlet. Then connect the AC power cord, and turn on the power again.
U TOC ERR* • The TOC information on this disc does not meet the MD • Replace it with another disc.
specifications or it cannot be read. • Erase all the data, and try recording.
U TOC W ERR • The TOC information could not be created properly due to • Turn off the power, and try to write the TOC again.
a mechanical shock or to scratches on the disc. (Remove any source of shock or vibration while writing.)
? DISC • The data contains an error. • Replace the disc with another disc. 00:00 • Music is not recorded. • Replace the disc with a recorded disc. * Number or symbol

– 7 –
MD-X8
POWER
MD / CD STEREO
MD-X8
Quick-Guide
Guía rápida
Conexión
Connection
Turning the
power on and off
Conexión y
desconexión de la
alimentación
Remote control
Control remoto
15˚
15˚
RIGHT
RATED SPEAKER
IMPEDANCE : 6 OHMS
LEFT
SPEAKERTS
AM
GND
GND
FM
75 OHMS
ANTENNA
FM Antenna
Antena de FM
●Right Speaker
●
Altavoz derecho
●Left Speaker
●
Altavoz izquierdo
●AM Loop Antenna
●
Antena de cuadro de AM
●AC 120V, 60Hz
To an AC outlet
●
120V CA, 60Hz
A un tomacorriente de CA
● Conecte el cable negro al terminal negativo (-), y el cable rojo al terminal positivo (+).
●Connect the black wire to the minus (-) terminal, and the red wire to the plus (+)
terminal.
Black
Negro
Black
Negro
Precaution
Precaución
●The sound level at a given volume setting depends on a combination of speaker efficiency, location and
many other factors. It is advisable to avoid exposure to high volume levels, which occurs while turning the
unit on with the volume control setting up high, or while continually listening at high volume levels.
●
El nivel de sonido en una posición de volumen fijado depende de una combinación del rendimiento de las
altavoces, la posición y muchos otros factores. Es aconsejable evitar un aumento de volumen. Esto se
produce, por ejemplo, al conectar el aparato con el volumen puesto en una posición alta. Evite continuar la
audición prolongada a altos niveles de sonido.
●2 "AA" batteries
●
Dos pilas "AA"
Sensor remote
Remote Sensor
8" - 20' (0.2m - 6m)
0,2m - 6m
W-WWWWWW -12
WWW -4 WWWW 0 W>W
RWWWWWWWWWWWWWWWWWWWW
LWWWWWWWWWWWWWWWWWWWW
W-WWWWWW
-12 WWW -4 WWWW 0 W>W
FMWSTWWWW87.5WMHzWWWW
CD playback
Reproducción de discos compactos
Radio operation
Funcionamiento de la radio
Playing a MiniDisc
Reproducción de un minidisco
TINSZ0267AWZZ
To remove a MiniDisc
Para extraer un minidisco
Sound control
Control del sonido
Printed in Malaysia
Impreso en Malaysia
A9707.YO
●Pre-programmed equalizer●Volume
●
Volumen
●Extra-BASS
●
Bajos extras
● Sonido perimétrico 3D
● 3D Surround
MD
MD
MD
CD
CD
TUNER
(BAND)
TUNING/CURSOR
UP
DOWN
VOLUME
DOWN UP
X-BASS
3D SURROUND
EQUALIZER


ÇPÇQÇRÇSÇTÇUÇVÇWÇXÇOÇPÇQÇRÇSÇTÇUÇVÇ
W
ÇPÇQÇRÇSÇTÇUÇVÇWÇXÇOÇPÇQÇRÇSÇTÇUÇVÇ
W
ÇPÇQÇRÇSÇTÇUÇVÇWÇXÇOÇPÇQÇRÇSÇTÇUÇVÇ
W
ÇPÇQÇRÇSÇTÇUÇVÇWÇXÇOÇPÇQÇRÇSÇTÇUÇVÇ
W
ÇPÇQÇRÇSÇTÇUÇVÇWÇXÇOÇPÇQÇRÇSÇTÇUÇVÇ
W
ÇPÇQÇRÇSÇTÇUÇVÇWÇXÇOÇPÇQÇRÇSÇTÇUÇVÇ
W
ÇPÇQÇRÇSÇTÇUÇVÇWÇXÇOÇPÇQÇRÇSÇTÇUÇVÇ
W
ÇPÇQÇRÇSÇTÇUÇVÇWÇXÇOÇPÇQÇRÇSÇTÇUÇVÇ
W
FLAT
HEAVY - 2
VOCAL
SOFT - 2
HEAVY - 1
SOFT - 1
● Ecualizador programado

MD-X8
– 8 –
Caution on Disassembly
Whe disassembling the machine or assenbling it after
repair, observe the following instructions so as to ensure
safety and keep its performance.
1. Unload the compact disc, and mini-disc from machine.
2. Be sure to unplug the power cable before starting
disasembly of the machine.
3. When disassenbling each section, remove the nylon
band or wire arrangement.
Ifa screw of improper lengthis fit to the MDmechanism.
(a screw fit the part to the mechanism chassis of MD
section), it may cantact the optical pickup, impeding
normal operation. Hence, due care must be taken.
4. While repairing, pay utmost attention to static electricity
on ICs.
1 Cabinet 1. Screw ................ (A1) x9 8-1
2 Rear Panel 1. Screw ................ (B1) x13 8-1
3 MD Unit 1. Flat Cable.......... (C1) x1 9-1
2. Socket ............... (C2) x1
3. Screw ................ (C3) x2
4 Fan Motor 1. Socket ............... (D1) x1 9-1
2. Screw ................ (D2) x3
3. Bracket .............. (D3) x2
5 Main PWB 1. Screw ................ (E1) x4 9-2
2. Socket ............... (E2) x11
6 Front Panel 1. Socket ............... (F1) x2 9-2
2. Screw ................ (F2) x4
7 Power PWB 1. Socket ............... (G1) x1 9-2
2. Screw ................ (G2) x4
8 Power Amp. PWB 1. Screw ................ (H1) x4 9-2
9 CD Changer Block 1. Screw ................ (J1) x4 9-3
2. Screw ................ (J2) x3
10 CD Servo PWB 1. Socket ............... (K1) x5 9-4
(Note 1 ) 2. Screw ................ (K2) x3
11 Tray Switch PWB 1. Screw ................ (L1) x1 9-4
12 Jack PWB 1. Socket ............... (M1) x1 9-5
2. Screw ................ (M2) x1
13 Mic PWB 1. Screw ................ (N1) x3 9-5
2. Screw ................ (N2) x1
14 Switch A PWB 1. Knob .................. (P1) x1 9-5
2. Nat..................... (P2) x1
3. Screw ................ (P3) x11
15 Switch B PWB/ 1. Screw ................ (Q1) x3 9-5
LED PWB 2. Holder................ (Q2) x1
3. Screw ................ (Q3) x6
16 Switch C PWB 1. Screw ................ (R1) x7 9-5
17 Display PWB 1. Flexible PWB .... (S1) x1 9-5
2. Screw ................ (S2) x1
18 Lamp PWB 1. Screw ................ (T1) x1 9-5
DISASSEMBLY
Figure 8-1
STEP REMOVAL PROCEDURE FIGURE
MAIN UNIT
Note 1: After removing the connector for the optical pickup
fromtheconnectorwraptheconductivealuminiumfoil
around the front end of connector so as to protect the
optical pickup from electrostatic damage.
19 CD Mechanism 1. Screw ................ (U1) x2 10-1
2. Top Bord ........... (U2) x1
3. Disc Holder ....... (U3) x1
4. Disc Tray ........... (U4) x3
5. Screw ................ (U5) x1
6. Mechanism Holder
Guide................. (U6) x1
7. Screw ................ (U7) x2
8. Mechanism Holder
Bracket .............. (U8) x1
9.
Mechanism Holder (U9) x1
10. Screw .............. (U10) x4
20 MD Mechanism 1. Screw ................ (V1) x4 10-2
2. MD Mechanism
holder ................ (V2) x2
3. Screw ................ (V3) x4
4. Flat Cable.......... (V4) x1
21 MD Main PWB 1. Screw ................ (W1) x4 10-3
(See page 11 2. Socket ............... (W2) x3
Figure 11-2) 3. Flat Cable.......... (W3) x1
4. Flexible PWB .... (W4) x1
22 MD Mechanism 1. Screw ................ (X1) x4 11-1
STEP REMOVAL PROCEDURE FIGURE
STEP REMOVAL PROCEDURE FIGURE
1 Speaker 1. Net........................... (A1) x1 11-3
2. Net Holder............... (A2) x4 11-4
3. Screw ...................... (A3) x4
4. Front Panel ............. (A4) x1
5. Screw ...................... (A5) x4
6. Screw ...................... (A6) x4
SPEAKER
(A1) x5
ø3 x8mm
(A1) x2
ø3 x8mm
(B1) x13
ø3 x8mm (A1) x2
ø3 x8mm
Cabinet Front Panel
Rear Panel

– 9 –
MD-X8
Figure 9-2
Figure 9-3
Figure 9-1
Figure 9-5
Figure 9-4
(J2) x2
ø3 x8mm
(J2) x1
ø3 x8mm
(J1) x4
ø3 x8mm
Main Chassis
Sub Chassis
CD Changer Block
(K2) x3
ø3 x8mm
(L1) x1
ø2 x7mm (K1) x2
(K1) x3
CD Changer
Block CD Servo PWB
Tray
Switch
PWB
(P3) x11
ø3 x10mm
(Q1) x3
ø3 x10mm
(Q3) x6
ø3 x10mm
(R1) x7
ø3 x10mm
(N1) x3
ø3 x8mm
(N2) x1
ø3 x8mm(M2) x1
ø3 x8mm (S2) x1
ø3 x8mm
(S1) x1
(M1) x1
(P2) x1 (P1) x1
Pawl
Pawl
Switch A PWB
Switch B PWB
Switch C PWB
LED PWB
Mic PWB
Jack PWB
Display PWB
Lamp PWB
Lamp PWB
Display
PWB
(Q2) x1
Front Panel
Washer
(T1) x1
ø3 x10mm
(C3) x2
ø3 x8mm
(C2) x1
(C1) x1
(D1) x1
(D3) x2
(D2) x2
ø3 x10mm
Front Panel
MD Unit
Power PWB
Main PWB
Motor
M971
(D2) x1
ø3 x8mm
Front Panel
Power PWB
(H1) x2
ø3 x12mm
(F2) x4
ø3 x8mm
(G2) x4
ø4 x8mm
(H1) x2
ø3 x8mm
(E1) x4
ø3 x10mm
(E2) x4
(E2) x4
(E2) x3 (G1) x1
(F1) x1
(F1) x1
Main PWB
Lamp PWB
Display PWB
Power Amp.
PWB

MD-X8
– 10 –
Figure 10-2 Figure 10-3
Figure 10-1
Push the pawl of disc tray
with a proper screwdriver.
Back surface
Pawl
Disc Tray 1
Disc Tray 2
Disc Tray 3
Pawl
(After drawing out the disc trays 1, 2, and 3, turn
over the mechanism unit, push two pawls, and
remove successively the three disc trays from the
mechanism unit, starting with the disc tray 3.
Thereby the CD mechanism shown in the right
figure can be removed.)
Shield Case (Top Sode)
Shield Case
(Bottom Side)
(V3) x 1
ø2 x 4mm
(V 1) x 2
ø3 x 10mm
(V3) x 1
ø2 x 4mm
(V1) x2
ø3 x 10mm
MD Mechanism Unit
(V3) x 1
ø2 x 4mm
(V3) x 1
ø2 x 4mm
MD Mechanism
Holder (Right)
(V2) x1
MD Mechanism
Holder (Left)
(V2) x1
Release the
locks at both
side
2
MD Flat Cable
MD Main
PWB
(V4) x1
CNS1902
12
1
3
MD Main PWB
Pull
Frame
(W3) x 1
(W2) x 2
Socket
(W4) x1
Optical pickup
Flexible PWB
(Note 1)
(Note 1) After removing the flexible PWB for optical pickup
from the connector wrap the front end of flexible PWB in
conductive aluminum foil so as to protect the optical pickup
from being damaged electrostatically.
Socket
(W2) x 1
(W1) x 4
ø1.7 x 3mm
(W2) x 1
(U1) x2
ø2 x7mm (U5) x1
ø2.6 x12mm
(U10) x4
ø2.6 x10mm
(U3) x1
(U2) x1
(U6) x1
(U9) x1
Disc Tray 2
Disc Tray 3
Spring
(U4) x3 1
2
3
Normal state
Press in turns the arrow
parts, starting with the
uppermost one, to
withdraw the disc trays
Pawl
Push.
CD
Mechanism
Disc Tray 1
Turn clockwise the
main cam to raise the
CD mechanism up to
the uppermost position.
(U7) x2
ø2 x6mm
(U8) x1

– 11 –
MD-X8
Figure 11-2
Figure 11-3
Figure 11-1
SPEAKER
Figure 11-4
(X1)x4
ø1.7x8.9mm
MD Mechanism
Frame
24Pin Flat Cable (42)
Copper foil tape
Solder joint
CNS1902
(Caution)
The copper foil tape is wound around the 24 pin flat
cable (42) to ground them to the case. Fit them in
the specified direction
MD Main PWB
Speaker Box
Front Panel
Net
(A1) x1
Top Panel
(A2)x4
(A3)x4
Ø4x16mm
(A6)x4
Ø3x12mm
(A5)x4
Ø4x16mm
(A4)x1
Front Panel
Speaker Box
Woofer
Tweeter
Speaker Cord
Speaker Cord
Speaker Cord

MD-X8
– 12 –
How to remove the sled motor/loading motor
(See Fig. 12-4)
1. Remove the screws (D1) x 4 pcs., and remove the sled
motor/loading motor.
Caution:
Be careful so that the gear is not damaged.
(The damaged gear emits noise during searching.)
Figure 12-4
Sled
Motor
Loading
Motor
(D1)x2
Ø1.7x2mm (D1)x2
Ø1.7x2mm
REMOVING AND REINSTALLING THE MAIN PARTS
MD MECHANISM SECTION
Performsteps1to3ofthedisassemblymethodtoremovethe
MD mechanism.
How to remove the magnetic head
(See Fig. 12-1)
1. Remove the screws (A1) x 1 pc.
2. Remove the solder joint (A2) x 2 connecting the magnetic
head to the head relay flexible board.
Caution:
Takeutmostcaresothatthemagneticheadisnotdamaged
when it is mounted.
How to remove the cartridge holder
(See Fig. 12-2)
1. Open the rpller arm lever in the arrow direction, and lower
the clamper lever to the rear side.
2. Apply +5V to the red line side of blue connector of loading
motor,pushtherackgearinthearrowdirection tomovethe
cam plate lever until tick is heard.
3. Remove the screw (B1) x1 pc., and the spring (B2) x1 pc.,
fitted to the holder arm, and shift the cartridge holder to the
left side to remove it.
How to remove the mechanism switch PWB
(See Fig. 12-3)
1.Removethescrews(C1)x2pcs.,andremovethemechanism
switch PWB.
Figure 12-1
Figure 12-2
Figure 12-3
MD Mechanism
(A1)x1
ø1.7x5mm
Magnetic Head
(A2)
Soldering x2
Soldering
x2
Slider Lever
Cartridge Holder
Clampa Lever
Lack Gear
Roller Arm Lever
Loading Motor
Cam Plate Lever
(B1) x1
Ø1.7x5mm
(B2) x1
(C1)x1
Ø1.7x3mm
(C1)x1
Ø1.7x9.5mm
MD Mechanism
Switch PWB

– 13 –
MD-X8
Figure 13-1
Figure 13-2
How to remove the spindle motor
(See Fig. 13-1)
1. Remove the screws (E1) x 3 pcs., and remove the spidle
motor.
Caution:
Be careful so that the turntable is not damaged.
How to remove the optical pickup
(See Fig. 13-2)
1. Remove the screws (F1) x 3 pcs.
Caution:
Be careful so that the gear is not damaged.
(The damaged gear emits noise during searching.)
Spindle Motor
Turntable
(E1)x3
Ø1.7x2.5mm
Optical Pickup
(F1)x3
Ø1.7x9.5mm
Figure 13-3
How to Replacing the loading pinch roller
(See Fig. 13-3.)
1. Remove the fixing washer (G1) x 1 pc. with small precise
screwdriver, and remove the loading pinch roller upward.
Caution:
The deformed or damaged fixing washer must be replaced
with new one.
How to Cleaning the loading pinch roller
(See Fig. 13-3.)
1. Impregnate swab with several drops of alcohol, and clean
the loading pinch roller with it.
2. Before using make sure that the cleaned parts have dried
sufficiently.
Loading pinch
roller
Fixing washer
(G1) x 1
MD mechanism

MD-X8
– 14 –
Figure 14-1
Figure 14-2
CD MECHANISM SECTION
For the procedure to remove the CD mechanism from the
mainunit,refertoDisassemblingProcedure,Steps1~10,and
19. (p.8).
How to Remove the optical pickup
(See Fig. 14-1.)
1. Remove the screws (A1)x 2 pcs., to remove shaft (A2)x 1
pc.
2.Removestopwasher(A3)x1pc.,toremovegear(A4)x1pc.
3. Remove the optical pickup.
Note:
After disconnecting the optical pickup connector wrap the
front end of connector in conductive aluminum foil so as to
prevent damage to the optical pickup by static electricity.
How to Remove the tray motor/main cam motor
(See Fig. 14-2.)
1. Remove the CD changer section by the method described
in page 8, and disassemble as shown in the figure.
2. Remove the belts (B1)x 2 pcs., from the motor side.
3. Remove the screws (B2)x 4 pc.
4. Remove the tray motor and main cam motor.
How to remove the CD disc
(When CD exists in the tray)
(See Fig. 14-4.)
1. Remove the cabinet and front panel.
2. Disassemble as shown in the figure so that the CD disc of
CD changer can be taken out.
3. Remove the CD disc from the tray as shown in the figure.
How to remove the CD disc
(When CD is in playback state)
(See Fig. 14-3.)
1. Remove the cabinet and front panel.
2. Disassemble as shown in the figure so that the CD disc of
CD changer becomes visible.
3. Remove the CD disc as shown in the figure.
Figure 14-3
Figure 14-4
(A1) x2
ø2.6 x5mm
CD
Mechanism
Stop Washer
(A3) x1
Gear
(A4) x1
Shaft
(A2) x1
Pickup
Tray Motor
Main Cam
Motor
Belt
(B1) x1 Belt
(B1) x1
(B2) x2
ø2.6 x4mm
(B2) x2
ø2.6 x4mm
Disc Tray 1
Disc Holder
CD Disc
Disc Tray 2
Disc Tray 3
CD Mechanism
Press in turns the arrow
parts, starting with the
uppermost one, to
withdraw the disc trays
Turn the main cam clockwise,
and raise the CD mechanism
and disc holder up to
uppermost position.
CD Changer
Block
Main Chassis
(When CD exists in the tray.)
1
2
3
CD Disc
Disc Holder
CD Changer
Block
Main Chassis
(When CD is in playback state.)
Turn the main cam clockwise,
and raise the CD mechanism
and disc holder up to
uppermost position.

– 15 –
MD-X8
ADJUSTMENT
fL: Low-range frequency
fH: High-renge frequency
• AM adjustment and confirmation
Figure 15-1 AM IF
TUNER SECTION • TEST mode setting method
Holdingdownthe ENTER button andTUNER(BAND) button,
turn on the power. Frequency is set in the memory (initial
setting) as shown in Table 15. Call the setting with the
PRESET button to use it for tuner circuit adjustment or
confirmation.
Preset No. Frequency
P01 87.5 MHz P06 530 kHz
P02 108.0 MHz P07 1,720 kHz
P03 90.0 MHz P08 600 kHz
P04 106.0 MHz P09 1,400 kHz
P05 98.0 MHz P10 990 kHz
Figure 15-3 ADJUSTMENT POINTS
Adjusting item Adjusting object Adjusting
method
IF Adjust the indication of Set IF wafeform
T351 set to 1,720 kHz.
450 kHz to maximum.
Frequency cover fL: T302 (530 kHz) fL: 1.1 ±0.1 V
(VT line voltage of Adjust the indication fH: 5.1 ±1.3 V of
pin 20 of IC302) of set to 530 kHz. (Only confirmation)
Tracking fL: T302 (990 kHz) Set the output of
speaker terminal
to maximum.
AM signal oscillator Frequency 400 Hz, 30%, AM modulation
• FM mute level adjustment
Frequency Adjusting
object
Adjusting
method
98.0 MHz 28 dB VR351 Input: SO301
Output: Speaker
Terminal
FM signal oscillator Frequency 400 Hz, 22.5 kHz
Adjusting object
Preset No. Frequency
Figure 15-2 FM Mute Level
Table 15 Initial setting of memory
Electronic
voltmeter
GND
AM Loop Antenna
AM signal oscillator
Loop Antenna
UNIT
IF : Speaker Terminal
Frequency cover: IC302, pin 20
Electronic
voltmeter
UNIT
FM signal oscillator SO301 Speaker
Terminal
20 13
121
AM IF
T302
FE301
IC302
JK501
ANALOG
IN/OUT
SO301
ANTENNA
TERMINAL
VR351
T351
AM TRACKING AM BAND
COVERAGE
FM MUTE
LEVEL
MAIN PWB

MD-X8
– 16 –
CD TEST MODE
CD test mode setting
Any one of test mode can be set by pressing several buttons as follows.
Holding down CD PLAY/PAUSE and TACK UP/CUE, turn on POWER. TEST: CD operation test
Test Mode
Function - CD TEST mode
Setting of Test mode
Indication of CD TEST mode
OPEN/CLOSE operation is manual operation.
The pickup can be moved with the ( ) or ( ) button.
<MEMORY> <MEMORY> <MEMORY> <STOP>
LASER ON Tracking on the spot. Tracking on the spot. STOP
SERVO OFF PLAY SERVO ON PLAY
<PLAY> button input - TOC. Initialization performed, and the ordinary PLAY is performed.
Press the <STOP> button. Stop
If the following button is pressed during PLAY, it is possible to specify directly any Track No.
<Disc Number 1> button: Track 4
<Disc Number 2> button: Track 9
<Disc Number 3> button: Track 15
Note:
Only in STOP state it is possible to slide the pickup with the ( ) or ( ) button.
VOL: Last memory
BAL: CENTER
R.GEQ: FLAT
X-BASS.OFF
Cancel method: POWER OFF
Initialization is not performed.
CD SECTION
Since this CD system incorporates the following automatic adjusting function, when the pickup is replaced, it is not necessary
to the readjust it .
Since this CD unit does not need adjustment, the combination of PWB and laser pickup unit is not restricted.
Automatic adjustment items
1. Focus Offset (Fig. 16-1)
2. Tracking Offset (Fig. 16-2)
3. E/F Balance (Tracking Error Balance) (Fig. 16-3)
4. R/F level AGC function (HF level: Constant)
5. RF level automatic follow-up of the tracking gain
This automatic adjustment is performed each time a disc
is changed. Therefore, each disc is played back using
the optimal settings.
Figure 16-1
Figure 16-2 Figure 16-3
2
0.1s
0.50 V
IC1 20 FE
0.1s
0.50 V
IC1 7 TE
1
FOCUS
OFF-SET
ADJUST
TRACKING
OFF-SET
ADJUST
2
1
10ms
0.50 V
IC1 20 FE
10ms
0.50 V
IC1 7 TE
Enlarged
View
TRACKING
OFF-SET
ADJUST
2
1
TO
TE
200 ms
1V/diV
IC 1 15
200 ms
1V/diV
IC 1 7
TRACKING/
ERROR
BARANCE
ADJUST

– 17 –
MD-X8
Figure 17
1. Preparation for adjustment
Test disc
MD SECTION
Type Test disc Part No. Price Code
1 High reflection disc TGYS1 (SONY) RRCDT0101AFZZ CB
2 Low reflection disc Recording minidisc UDSKM0001AFZZ AZ
3 Head Adjusting transparent RRCDT0103AFZZ BK
Extension Cable (See Fig. 17)
Type Part No.
1 Extension PWB for servicing RUNTK0457AFZZ
2 Extension Connector (2 Pin) QCNWK0059AFZZ AF
3 Extension Connector (6 Pin) QCNWK0107AFZZ
4 Extension Cable (5 Pin) QCNWK0109AFZZ
3 Extension Cable (28 Pin) QCNWK0108AFZZ
Price Code
2. Test mode
Test mode setting method
1. Holding down the + button and MD (PLAY/PAUSE) button, press the POWER button.
(State A is changed to state B .)
2. Insert the playback disc 1 (high reflection disc) or recording disc 2 (low reflection disc). (State C is set.)
Thus, the test mode state is set.
A tsm e : TEST MODE represents version of MD microcomputer.
TEST STOP state (When the MD (STOP) button is ressed in the C state, the indication A
is restored. To restore C again, press the CD (PLAY/ PAUSE)
button.)
B EJECT
TEST
C AUT YOBI
TEST
Entering the specific mode
Whenever the CD (PLAY/PAUSE) button is pressed, the mode is changed.
AUTO pre-adjustment AUTO adjustment RESULT Pre-adjustment
EEPROM setting MANUAL adjustment RESULT MANUAL pre-adjustment
• Canceling the test mode
When the POWER button is pressed, the test mode is canceled, and the POWER OFF state is set.
• Note
Remove the MD unit for repeir, ansd after installing it in the set, be dure to reset it and ascertain that reset has been done.
Resetting procedure (1) Unplug the AC cord from the socket, and hold down the RESET buttonm provided at the rear side
for more than 10 seconds.
(2) Once set the TEST MODE (holding down the TEST MODE (X-BASS botton) and botton
together, press the POWER button), and then turn off power.
5Pin extension flat cable
QCNWK0109AFZZ
2Pin extension connector
QCNWK0059AFZZ
CNP1601(Bottom side)
CNP1602
CNP1252
CNP1603
CNP1604(Bottom side) CNS1101
MD MAIN PWB
6P-2P extension connector
QCNWK0107AFZZ
28Pin extension flat cable
QCNWK0108AFZZ Extension PWB for service
(RUNTK0457AFZZ)
Fit the extension PWB for service to the mechanism
From Optical
Pickup Unit
From Magnetic Head
From
motor
From mecha-
nism switch
PWB

MD-X8
– 18 –
• Test Mode
1. AUTO pre-adjustment mode • Automatic pre-adjustment is performed. (After adjustment the grating adjustment mode is set.)
• The adjustment value is output with the aid of system controller interface.
2. AUTO adjustment mode • Automatic adjustment is performed.
• The adjustment value is output with the aid of system controller interface.
• Continuous playback is performed. (Error rate indication, jump test)
3. RESULT sub-mode • The measurement value, set value and calculated value are indicated.
• The set value is changed manually (in servo OFF state).
4. RESULT mode (final adjustment) • The set value (after calculation) is indicated.
• The set value is changed manually (in servo OFF state).
5. MANUAL pre-adjustment mode • RF side manual adjustment is performed.
• Focus and tracking signal ATT manual adjustment is performed.
• Focus and tracking signal offset setting is performed.
6. MANUAL adjustment mode • Focus and tracking signal ATT manual adjustment is performed.
7. EEPROM setting mode • Various coefficients of digital servo are changed manually.
• Each servo is set to ON individually.
• Temperature detection terminal voltage is measured, and the reference value is determined.
8. TEST-PLAY mode • Continuous playback from the specified address is performed.
• C1 error rate measurement, ADIP error rate measurement.
9. TEST-REC mode • Continuous recording from the specified address is performed.
• Change of record laser output (servo gain is also changed according to laser output)
10. INNER mode • The position where the INNER switch is turned on is measured.
11. EJECT mode • TEMP setting (of EEPROM setting)
• CONTROL setting (of EEPROM setting)
• Setting of laser power (record/playback power)
1. AUTO pre-adjustment mode (Low reflection disc only)
Step No. Setting Method Remarks Display
Step 1 Testmode STOP state [ t s m e ]
Step 2 Press once the CD PLAY button. AUTO pre-adjustment menu [ _ A U T _ Y O B I _ ]
Step 3 Press once the MD PLAY button. The slide moves to the innermost periphery, and automatic [ : _ _ _ _ _ _ ]
pre-adjustment is started.
• During automatic adjustment changes as follows.
HAo→RFg→SAg→SBg→PTG→PCH→GTG→GCH→RCG→
SEG→RFG→SAG→HAO→HEO→TCO→LAO
End of adjustment If adjustment is OK, Step 4.
If adjustment is NG, Step 5.
Step 4 Grating adjustment, [ _ C O M P L E T E _ ]
adjustment value output
Press once the MD STOP button. STEP 2
Step 5 Adjustment value output [ C a n ' t _ A D J . ]
Press once the MD STOP button. STEP 2 AUTO pre-adjustment menu
• : Adjustment name, : Address

– 19 –
MD-X8
Step 1 Testmode STOP state [ t s m e ]
Step 2 Press the CD PLAY button three times. RESULT sub-menu [ _ R S T _ Y O B I _ ]
Step 3 Press once the MD PLAY button. Indication of measurement value [ R F G : _ _ _ ]
Step 4 Press once the CD PLAY button. Indication of measurement value [ R C G : _ _ _ ]
Step 5 Press once the CD PLAY button. Indication of measurement value [ R T G : _ _ _ _ _ ]
Step 6 Press once the CD PLAY button. Indication of measurement value [ G T G : _ _ _ _ _ ]
Step 7 Press once the CD PLAY button. Indication of measurement value [ P C H : _ _ _ _ ]
Step 8 Press once the CD PLAY button. Indication of measurement value [ G C H : _ _ _ _ ]
Step 9 Press once the CD PLAY button. Indication of measurement value [ S A G : _ _ _ ]
Step 10 Press once the CD PLAY button. Indication of measurement value [ S B G : _ _ _ ]
Step 11 Press once the CD PLAY button. Indication of measurement value [ S E G : _ _ _ ]
Step 12 Press once the CD PLAY button. Indication of measurement value [ S F G : _ _ _ ]
Step 13 Press once the CD PLAY button. Indication of measurement value [ H A O : _ _ _]
Step 14 Press once the CD PLAY button. Indication of measurement value [ H B O : _ _ _]
Step 15 Press once the CD PLAY button. Indication of measurement value [ H E O : _ _ _]
Step 16 Press once the CD PLAY button. Indication of measurement value [ H F O : _ _ _]
Step 17 Press once the CD PLAY button. Indication of measurement value [ L A O : _ _ _]
Step 18 Press once the CD PLAY button. Indication of measurement value [ L B O : _ _ _]
Step 19 Press once the CD PLAY button. Indication of measurement value [ L E O : _ _ _]
Step 20 Press once the CD PLAY button. Indication of measurement value [ L F O : _ _ _]
Step 21 Press once the CD PLAY button. Indication of measurement value [ T C O : _ _ _ _]
Step 22 Press once the CD PLAY button. Indication of adjustment error sequence No. [ Y O B : _ _ _ _]
Step 23 Press once the CD PLAY button. Indication of adjustment status [ D I F : _ _ _ _]
Step 24 Press once the CD PLAY button. Indication of pre-adjustment not completed (00)/completed (4B) [ A D J : _ _ _ _]
Step 25 Press once the MD PLAY button. RESULT sub-menu state [ _ R S T _ Y O B I _ ]
2. AUTO adjustment mode
Step No. Setting Method Remarks Display
Step 1 Testmode STOP state [ t s m e ]
Step 2 Press the CD PLAY button two times. AUTO adjustment menu [ A U T O _ A J S T _ ]
Step 3 Press once the MD PLAY button. The slide moves to the innermost periphery, and automatic [ : _ _ _ _ _ _ ]
adjustment is started.
• In case of high reflection disc changes as follows.
PEG→HAG
•In case of low reflection disc changes as follows.
PEG→LAG→GCG→GEG→LAG
End of adjustment If adjustment is OK, Step 4.
If adjustment is NG, Step 7.
Step 4 Adjustment value output [ _ C O M P L E T E _ ]
Press the MD PLAY button. STEP 5
Press the MD STOP button. STEP 2
Step 5 Continuous playback (pit section) [ s c ]
Continuous playback (groove section) [ a c ]
Step 6 Press the CD STOP button. Continuous playback (groove section) [ a a ]
Press the MD STOP button. STEP 2 AUTO adjustment menu
Step 7 Adjustment value output [ C a n ' t _ A D J . ]
Press the MD STOP button. STEP 2 AUTO adjustment menu
• : Adjustment name, : Measurement value, : Address
3. RESULT sub-mode
Step No. Setting Method Remarks Display
• : Measurement value, : Adjustment value, : Other various informations
• ressing the REC button causes reversing.
• If the VOL UP button is pressed while the set value is indicated, the set value increases, and the new set value is stored in RAM.
• If the VOL DOWN button is pressed while the set value is indicated, the set value reduces, and the new set value is stored in RAM.
• If the VOL UP/VOL DOWN button is held down, the set value changes continuously with 100 ms cycle.
• The digit of increase/decrease by the VOL UP/VOL DOWN button can be shifted with the aid of CD STOP button.

MD-X8
– 20 –
Step 1 Testmode STOP state [ t s m e ]
Step 2 Press the CD PLAY button four times. RESULT menu [ _ R E S U L T _ _ _ ]
Step 3 Press once the MD PLAY button. Indication of set value [ H A G : _ _ _ ]
Step 4 Press once the CD PLAY button. Indication of set value [ H B G : _ _ _ ]
Step 5 Press once the CD PLAY button. Indication of set value [ L A G : _ _ _ ]
Step 6 Press once the CD PLAY button. Indication of set value [ L B G : _ _ _ ]
Step 7 Press once the CD PLAY button. Indication of set value [ P E G : _ _ _ ]
Step 8 Press once the CD PLAY button. Indication of set value [ P F G : _ _ _ ]
Step 9 Press once the CD PLAY button. Indication of set value [ G E G : _ _ _ ]
Step 10 Press once the CD PLAY button. Indication of set value [ G F G : _ _ _ ]
Step 11 Press once the CD PLAY button. Indication of set value [ G C G : _ _ _ _ ]
Step 12 Press once the MD STOP button. RESULT menu state [ _ R E S U L T _ _ _ ]
3. RESULT mode (final adjustment)
Step No. Setting Method Remarks Display
• : Measurement value
• ressing the REC button causes reversing.
• If the VOL UP button is pressed while the set value is indicated, the set value increases, and the new set value is stored in RAM.
• If the VOL DOWN button is pressed while the set value is indicated, the set value reduces, and the new set value is stored in RAM.
• If the VOL UP/VOL DOWN button is held down, the set value changes continuously with 100 ms cycle.
• The digit of increase/decrease by the VOL UP/VOL DOWN button can be shifted with the aid of CD STOP button.
Step 1 Testmode STOP state [ t s m e ]
Step 2 Press the CD PLAY button five times. MANUAL auxiliary adjustment mode [ _ M N U _ Y O B I _ ]
Step 3 Press once the MD PLAY button. Initial setting →Temperature measuring mode [ T M P : _ _ _ _ ]
Step 4 Press once the CD PLAY button. Offset "0" setting →A signal offset tentative measurement [ H A o : _ _ _ ]
Step 5 Press once the CD PLAY button. B signal offset tentative measurement [ H B o : _ _ _ ]
Step 6 Press once the CD PLAY button. E signal offset tentative measurement [ H E o : _ _ _ ]
Step 7 Press once the CD PLAY button. F signal offset tentative measurement [ H F o : _ _ _ ]
Step 8 Press once the CD PLAY button. Offset tentative measurement →Laser ON [ L O N : _ _ _ _ _ _ ]
Step 9 Press once the CD PLAY button. Innermost periphery move →RF side FG rough adjustment [ R F g : _ _ ]
Step 10 Press once the CD PLAY button. Focus ATT (A signal) tentative setting [ S A g : ]
Step 11 Press once the CD PLAY button. Focus ATT (B signal) tentative setting [ S B g : ]
Step 12 Press once the CD PLAY button. RF side pit section TG adjustment [ P T G : _ _ ]
Step 13 Press once the CD PLAY button. Pit section COUT level setting [ P C H : _ ]
Step 14 Press once the CD PLAY button. Outer periphery move →RF side groove TG adjustment [ G T G : _ _ ]
Step 15 Press once the CD PLAY button. Groove section COUT level setting [ G C H : _ ]
Step 16 Press once the CD PLAY button. RF side TCRS adjustment [ R C G : _ _ ]
Step 17 Press once the CD PLAY button. Tracking ATT (E signal) setting [ S E G : ]
Step 18 Press once the CD PLAY button. Tracking ATT (F signal) setting [ S F G : ]
Step 19 Press once the CD PLAY button. Indication of tracking EFMIO measurement [ g M I : _ _ _ ]
Step 20 Press once the CD PLAY button. RF side pit section FG adjustment [R F G : _ _ ]
Step 21 Press once the CD PLAY button. Focus ATT (A signal) setting [ S A G : ]
Step 22 Press once the CD PLAY button. Focus ATT (B signal) setting [ S B G : ]
Step 23 Press once the CD PLAY button. Offset "0" setting →A signal offset measurement [ H A O : _ _ _ ]
Step 24 Press once the CD PLAY button. B signal offset measurement [ H B O : _ _ _ ]
Step 25 Press once the CD PLAY button. E signal offset measurement [ H E O : _ _ _ ]
Step 26 Press once the CD PLAY button. F signal offset measurement [ H F O : _ _ _ ]
Step 27 Press once the CD PLAY button. TCRS signal offset measurement [ T C O : _ _ _ ]
Step 28 Press once the CD PLAY button. A signal offset measurement [ L A O : _ _ _ ]
Step 29 Press once the CD PLAY button. B signal offset measurement [ L B O : _ _ _ ]
Step 30 Press once the CD PLAY button. E signal offset measurement [ L E O : _ _ _ ]
Step 31 Press once the CD PLAY button. F signal offset measurement [ L F O : _ _ _ ]
5. MANUAL auxiliary adjustment mode (only low reflection disc)
Step No. Setting Method Remarks Display
• : Measurement value, : Set value, : Account value