Sharp IM-DR580H(S) User manual

IM-DR580H
CONTENTS
Page
SAFETY PRECAUTION FOR SERVICE MANUAL .......................................................................................................... 2
PRECAUTIONS FOR USING LEAD-FREE SOLDER ...................................................................................................... 3
SPECIFICATIONS ............................................................................................................................................................ 4
NAMES OF PARTS .......................................................................................................................................................... 5
DISASSEMBLY................................................................................................................................................................. 7
REMOVING AND REINSTALLING THE MAIN PARTS .................................................................................................... 9
ADJUSTMENT ................................................................................................................................................................ 10
BLOCK DIAGRAM .......................................................................................................................................................... 31
WIRING SIDE OF P.W.BOARD / SCHEMATIC DIAGRAM ............................................................................................ 33
VOLTAGE ....................................................................................................................................................................... 47
NOTES ON SCHEMATIC DIAGRAM ............................................................................................................................. 48
TYPES OF TRANSISTOR AND DIODE ......................................................................................................................... 48
WAVEFORMS OF MD CIRCUIT .................................................................................................................................... 49
TROUBLESHOOTING .................................................................................................................................................... 51
FUNCTION TABLE OF IC............................................................................................................................................... 54
PARTS GUIDE/EXPLODED VIEW
PACKING METHOD (FOR U.K. ONLY)
SERVICE MANUAL
SHARP CORPORATION
No. SY380IMDR580H
This document has been published to be used
for after sales service only.
The contents are subject to change without notice.
• In the interests of user-safety the set should be restored to its
original condition and only parts identical to those specified be
used.
IM-DR580H(S)
MODEL IM-DR580H(BK)
1-BIT PORTABLE MINIDISC RECORDER

IM-DR580H
– 2 –
Precaution to be taken when replacing and servicing the laser pickup.
The following precautions must be observed during servicing to protect your eyes against exposure to the laser.
Warning of possible eye damage when repairing:
If the AC adaptor or batteries are connected when the top housing (disc cover) of the unit is removed, and the PLAY key is
pressed, the laser will light up during focus access (2-3 seconds). (Fig. 2-1) During the operation, the laser will leak from the
opening between the magnetic head and the mechanical chassis (Fig. 2-2). 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.
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 1 Requirements.
However, the following precautions must be observed during servicing to protect your eyes against exposure to the laser beam.
(1)Whenthecabinet has beenremoved,the power isturnedonwithout a compactdisc,and the Pickupisona position outerthan
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.
SAFETY PRECAUTION FOR SERVICE MANUAL
Magnet Head Laser Beam
Optical Pickup
Main PWB
Spindle motor
Mechanism
Chassis
Figure 2-1 Figure 2-2
For U.K. Except for U.K.
Laser Diode Properties
Material: GaAIAs
Wavelength: 785 nm
Pulse time:
Read mode: 0.8 mW Continuous
Write mode: max 12 mW 0.5S
min cycle 1.5S
Repetition
Laser Diode Properties
Material: GaAlAs
Wavelength: 785 nm
Pulse time:
Read mode: 0.8 mW Continuous
Write mode: max 12 mW 0.5S
min cycle 1.5S
Repetition
WARNUNG - UNSICHTBARE LASERSTRAHLUNG DER
KLASSE 3B WENN GERÄT GEÖFFNET.
UND VERRIEGELUNGEN AUFGEHOBEN. VERMEIDEN SIE,
SICH DER STRAHLUNG AUSZUSETZEN.
ATTENTION - RAYON LASER DE CLASSE 3B INVISIBLE EN
CAS D'OUVERTURE ET DE VERROUILLAGE DÉFECTUEUX.
ÉVTTER UNE EXPOSITION AU FAISCEAU.
VARO - AVATTAESSA JA SUOJALUKITUS OHITETTAESSA
OLET ALTTIINA LUOKAN 3B NÄKYMÄTÖNTÄ
LASERSÄTEILYLLE VARO ALTISTUMISTA SÄTEELLE.
VARNING - KLASS 3B OSYNLIG LASERSTRÅLNING NÄR
DENNA DEL ÄR ÖPPNAD OCH SPÄRREN ÄR URKOPPLAD
UNDVIK EXPONERING FÖR STRÅLEN.
ADVARSEL - KLASS 3B USYNLIG LASERSTRÅLNING VED
ÅBNING, NÅR SIKKERHEDSAFBRYDERE ER UDE AF
FUNKTION UNDGÅUDSÆTTELSE FOR STRÅLNING.
OPEN
OPEN
Magnet Head
Optical Pickup Top Cabinet

IM-DR580H
–3 –
PRECAUTIONS FOR USING LEAD-FREE SOLDER
1. Employing lead-free solder
"All PWBs" of this model employs lead-free solder. The LF symbol indicates lead-free solder, and is attached on the PWBs and
service manuals. The alphabetical character following LF shows the type of lead-free solder.
Example:
Indicates lead-free solder of tin, silver and copper.
2. Using lead-free wire solder
WhenfixingthePWBsolderedwiththelead-freesolder,applylead-freewiresolder.Repairingwithconventionalleadwiresolder
may cause damage or accident due to cracks.
As the melting point of lead-free solder (Sn-Ag-Cu) is higher than the lead wire solder by 40 °C, we recommend you to use a
dedicatedsoldering bit,ifyouarenotfamiliarwithhowtoobtainlead-freewiresolder orsoldering bit,contact ourservicestation
or service branch in your area.
3. Soldering
As the melting point of lead-free solder (Sn-Ag-Cu) is about 220 °C which is higher than the conventional lead solder by 40°C,
and as it has poor solder wettability, you may be apt to keep the soldering bit in contact with the PWB for extended period of
time. However, Since the land may be peeled off or the maximum heat-resistance temperature of parts may be exceeded,
remove the bit from the PWB as soon as you confirm the steady soldering condition.
Lead-free solder contains more tin, and the end of the soldering bit may be easily corrected. Make sure to turn on and off the
power of the bit as required.
If a different type of solder stays on the tip of the soldering bit, it is alloyed with lead-free solder. Clean the bit after every use
of it.
When the tip of the soldering bit is blackened during use, file it with steel wool or fine sandpaper.
Be careful when replacing parts with polarity indication on the PWB silk.
Lead-free wire solder for servicing
Ref No. DescriptionParts No.
PWB-A 92LPWB5593MDSS Main
PWB-B1 92LPWB5484CHRS Multi-Link Station A

IM-DR580H
–4 –
FORACOMPLETEDESCRIPTIONOFTHEOPERATIONOFTHISUNIT,PLEASEREFERTO
THE OPERATION MANUAL.
Specifications for this model are subject to change without prior
notice
SPECIFICATIONS
Power source: DC 1.2 V: Rechargeable Nickel-Metal Hydride Battery (AD-N55BT) x 1
DC 1.5 V: Commercially available, "AA" size (LR6), alkaline battery x 1
DC 3 V: AC adaptor (AC 110 - 240 V, 50/60 Hz), with the multi-link station
Power consumption: 60 mA (AC adaptor)
Output power: RMS: 16 mW (8 mW + 8 mW)
Charging time: Approx. 3.5 hours (90 %)
Approx. 5.5 hours (fully charged)(When using the AC adaptor included with the unit)
Dimensions: Width: 80.1 mm
Height: 16.6 mm
Depth: 72.6 mm
Weight: 120 g with rechargeable battery/95 g without rechargeable battery
USB socket: Multi-link station; exclusive USB socket
Input socket: Main unit; Microphone (powered by the main unit)
Multi-link station; Line/optical digital
Output socket: Main unit; Earphones (impedance: 32 ohms)/remote control
Multi-link station; audio output, speaker output
Type: Portable MiniDisc recorder
Signal readout: Non-contact, 3-beam semiconductor laser pickup
Audio channels: Stereo 2 channels/monaural 1 channel
Frequency response: 20 - 20,000 Hz (±3 dB)
Rotation speed: Approx. 400 - 1,800 rpm CLV (Playback), approx. 400 - 2,700 rpm CLV (Recording)
Error correction: ACIRC (Advanced Cross Interleave Reed-Solomon Code)
Coding: ATRAC/ATRAC3 (Adaptive TRansform Acoustic Coding), 24-bit computed type
Recording method: Magnetic modulation overwrite method
Sampling frequency: 44.1 kHz (32 kHz and 48 kHz signals are converted to 44.1 kHz, and then recorded.)
Wow and flutter: Unmeasurable (less than ±0.001 % W. peak)
Battery life:
Input sensitivity: Output level:
Stereo 2 times long 4 times long
When using the rechargeable
battery (fully charged) included
with the unit
Continuous
recording:
Approx. 8
hours
Continuous
play: Approx.
27 hours
Continuous
recording:
Approx. 12
hours
Continuous
play: Approx.
36 hours
Continuous
recording:
Approx. 15
hours
Continuous
play: Approx.
42 hours
When using a commercially
available, high capacity, "AA"
size (LR6), alkaline battery
Continuous
recording:
Approx. 8
hours
Continuous
play: Approx.
48 hours
Continuous
recording:
Approx. 15
hours
Continuous
play: Approx.
67 hours
Continuous
recording:
Approx. 20.5
hours
Continuous
play: Approx.
75 hours
When using one, commercially
available, high capacity, "AA"
size (LR6), alkaline battery with
the rechargeable battery (fully
charged)
Continuous
recording:
Approx. 20
hours
Continuous
play: Approx.
80 hours
Continuous
recording:
Approx. 30.5
hours
Continuous
play: Approx.
103 hours
Continuous
recording:
Approx. 40
hours
Continuous
play: Approx.
122 hours
The above values are the standard values when the unit is used at an ambient temperature of 25°C.
The continuous recording time is for microphone input when the volume level is set to "VOL 0" and the backlight is set to
"LIGHT OFF".
The continuous play time shows the value when the volume level is set to "VOL 15" and the backlight is set to "LIGHT OFF".
The operating time when using an alkaline battery may be different, depending on the type and manufacturer of the battery,
and on the operating temperature.
"Fully charged" means that the battery is charged for approx. 3.5 hours, and charged for another 2 hours after the battery
indicator disappears.
Reference input
level Input impedance
MIC H 0.25 mV 10 k ohms
MIC L 2.5 mV 10 k ohms
LINE 100 mV 20 k ohms
Specified out-
put Maximum out- put level Load imped- ance
Ear-
phones - 8 mW + 8 mW 32 ohms
Audio out-
put 125 mV (-12 dB) - 10 k ohms
Speaker
output 125 mV (-12 dB) *1 - 10 k ohms
*1 When the speaker output selector switch of the multi-link
station is set to MD.

IM-DR580H
–5 –
NAMES OF PARTS
Main unit
1. Stop/Power Off/Hold Button
2. Record Indicator
3. Play/Fast Forward/Fast Reverse/
Volume Button
4. Battery Connection Terminals
5. Multi-link Station Connection Terminal
6. Microphone Input Socket
7. Remote Control/
Earphone Output Socket
8. Open Lever
9. Rechargeable Battery Cover
Multi-link station display
1. Record Indicator
2. TOC Indicator
3. Level Meter
4. Repeat Indicator
5. Random Indicator
6. Synchro Recording Indicator
7. Disc Information Indicator
8. Group Information Indicator
9. Track Information Indicator
10. Battery Indicator
11. Track Protection Indicator
12. Disc Mode Indicator
13. Character/Time Information Indicator
14. Long-Play/Recording Mode Indicator
15. Monaural Mode Indicator
16. Group Indicator
17. My Entry Indicator
1
2
3
4
5
6789
13 5410
11
12
13
14 15 16 17
6
7
8
9
Remote control unit
1. Earphones Socket
2. Record Button
3. Display/Bass Button
4. Playback or Recording Mode
Switching Button
5. Menu Button
6. Volume Buttons
7. Stop/Power Off Button
8. Fast Reverse/Recording Level/
Menu Select Button
9. Play/Pause Button
10. Fast Forward/Recording Level/
Menu Select Button
11. Hold Switch
12. Disc Mode Indicator
13. Total Track Number Indicator
14. Track Number Indicator
15. Character/Time Information Indicator
16. My Entry Indicator
17. Random Indicator
18. Repeat Indicator
19. TOC Indicator
20. Record Indicator
21. Group Indicator
22. Battery Indicator
23. Synchro Recording Indicator
24. Auto Track Mark Record Indicator
25. Alarm Indicator
12
19
13 14 15 16 1817
20 21 22
23
24
25
11
1
8
6710
245
3
9
2

IM-DR580H
–6 –
Multi-link station
1. Playback/Recording Mode Switching/
Charge Button
2. Display/Bass Button
3. Record Button
4. Erase Button
5. Power On or Off/Stop Button
6. Fast Forward/Fast Reverse/
Recording Level/Volume Button
7. Play/Pause Button
8. Enter/USB Switching Button
9. Menu Button
10. Connection Terminal to Main Unit
11. Speaker Output Selector Switch
12. 3 V DC Input Socket
13. USB Socket
14. Optical/Line Input Socket
15. Audio Output Socket
16. Speaker Output Socket
1
2
34
5
6
7
11
10
12 13 14
15
16
8
9

IM-DR580H
–7 –
1 Bottom Cabinet 1. Remove the rechargeable . 7-2
battery cover as indicated
by the arrow.
2. Screw .....................(A1) x5 7-1
2 Main PWB 1. Screw .....................(B1) x2 7-2
2. Screw .....................(B2) x1
3. Flexible PWB..........(B3) x3
3 Top Cabinet 1. Open the Top cabinet. 7-1
2. Screw .................... (C1) x4 7-2
4 MD Mechanism 1. Remove the center cabinet 7-3
as indicated by the arrow.
2. Screw .................... (D1) x1
5 Operation Button 1. Screw ......................(E1) x1 7-4
Flexible PWB Ass'y
DISASSEMBLY
Cares before disassembling
When assembling the machine after disassembling or
repair, observe the following requirements so as to ensure
safety and performance.
1.Removethebatteriesfromthemachine,andtakeoutthe
mini-disc.
2. When assembling after repair, be sure to position the
wires in the same location.
Use the specified screws to fix the cabinet and the
mechanismunit. Theuseofthescrewswithlength other
than specified may cause contact with the mechanism
unit resulting in malfunction.
3.Whenrepairing,paycloseattentionsonottodamagethe
IC from static electricity.
REMOVAL PROCEDURE STEP FIGURE Figure 7-1
Figure 7-2
Figure 7-4
Caution:
Carefullyhandle the mainPWBand flexible PWB.Afterremoving the
flexible PWB (1*) for the optical pickup from the connector, do not
touch directly the front end of flexible PWB with your hand so as to
prevent damage of optical pickup by static electricity.
Figure 7-3
Top Cabinet
Bottom Cabinet
EJECT Knob
(A1)x2
ø1.4x1.5mm
(A1)x1
ø1.4x1.5mm
(A1)x1
ø1.4x1.5mm
(A1)x1
ø1.4x1.5mm
(B1)x2
ø1.4x2.5mm
Pull
Pull
Pull
Pull
Pull
Pull
Battery
Cover
Center Cabinet
Top Cabinet
Main PWB
1
2
(B3)x1(1*)
(B3)x1
EJECT Frame
Ass'y
(B3)x1
(C1)x2
ø1.4x1.5mm
(B2)x1
ø1.4x1.5mm
(C1)x2
ø1.4x1.5mm
MD Mechanism
(D1)x1
ø1.4x1.5mm
Center
Cabinet
EJECT Frame
Ass'y
Main Frame Ass'y
(E1)x1
ø1.4x1.5mm
Operation Button
Flexible PWB Ass'y
Top Cabinet
Main Unit

IM-DR580H
–8 –
1 Bottom Cabinet 1. Screw .....................(A1) x4 8-1
2 Multi-Link Station 1. Hook .......................(B1) x3 8-2
B PWB 2. Flat Cable...............(B2) x1
3. Hook .......................(B3) x2
4. Multi-Link Station B PWB
Holder.....................(B4) x1
3 Multi-Link Station 1. Hook ...................... (C1) x2 8-2
A PWB
REMOVAL PROCEDURE STEP FIGURE
Multi-Link Station
Figure 8-1 Figure 8-2
(A1)x4
ø2x5mm
Bottom Cabinet
Top Cabinet
Pull
Pull
(B1)x2
(C1)x2
(B3)x2
(B2)x1
(B1)x1
(B4)x1
Bottom Cabinet
Multi-Link Station
A PWB
Multi-Link Station
B PWB

IM-DR580H
–9 –
REMOVING AND REINSTALLING THE MAIN PARTS
Remove the MD mechanism according to the disassembling
methods 1 to 4. (See Page 7.)
Figure 9-1
Figure 9-2
Figure 9-3Figure 9-4
How to remove the spindle motor
(See Fig.
9 -1.)
1. Remove the solder joints (A1) x 4 of flexible PWB.
2. Remove the screws (A2) x 3 pcs., and remove the spindle
motor.
How to remove the lift motor (See Fig. 9-2.)
1. Remove the solder joints (B1) x 2 of lift motor lead wire.
2. Remove the screw (B2) x 1 pc., and remove the lift motor.
Note:
Take care so that the motor gear is not damaged.
(If the gear is damaged, noise is caused.)
How to remove the sled motor (See Fig. 9-3.)
1.Remove thestop washer(C1)x1pc.,andremovethedrive
gear (C2) x 1 pc.
2. Remove the screws (C3) x 2 pcs.
3. Remove the solder joints (C4) x 3 of flexible PWB., and
remove the sled motor.
Note:
Take care so that the motor gear is not damaged.
(If the gear is damaged, noise is caused.)
How to remove the magnetic head ass'y
(See Fig.
9 -4.)
1. Remove the screws (D1) x 2 pcs., of the magnetic head
ass'y and the optical pickup, and remove the solder joints
(D2) x 2 of the head flexible plate.
Note:
Mount carefully so as not to damage the magnetic head.
How to reinstall the optical pickup
(See Fig. 9-4.)
1.Removethescrew(E1) x1pc.,andremove thegripspring.
2.Removethescrew(E2)x1pc.,toremovethethrust spring,
andremovethedrivescrewandtheopticalpickup fromMD
mechanism.
Then, remove the drive screw from the optical pickup.
(A2)x3
ø1.4x1.8mm
MD Mechanism
Spindle Motor
Solder Joints
(A1)x4
Solder Joints
(B1)x2
Lift Motor
MD Mechanism
(B2)x1
ø1.4x3.3mm
(C1)x1
(C2)x1
(C3)x2
ø1.4x1.2mm
Sled Motor
Solder
Joints
(C4)x3
MD Mechanism
(E2)x1
ø1.4x1.2mm
(E1)x1
ø1.4x1.8mm (D1)x2
ø1.4x1.8mm
Thrust
Spring
Optical Pickup
Magnetic
Head Ass'y
Drive Screw
Grip Spring
MD Mechanism
Solder
Joints
(D2)x2

IM-DR580H
–10 –
Entering the TEST mode
1. Setting by main unit or multi-link station operation (in
the stand-by state)
1 Keep holding down the VOLUME + button and press the PLAY
button.
2 With the PLAY button pressed, release the VOLUME + button.
3 With the PLAY button pressed, release the VOLUME –button.
4 Keep holding down the VOLUME –button, release the PLAY
button and then release the VOLUME –button.
5 The test mode stops, and [ T E S T _ ] appears.
2. Setting by remote control operation (in the stand-by
state)
1 Switch the HOLD button from OFF to ON.
2 Hold down the VOLUME –button.
3 With the VOLUME –button pressed, switch the HOLD button
tofromONtoOFF.(Completesteps 1 to 3 within2seconds.)
4 Keep holding down the VOLUME –button and release the
PLAY button.
5 With the PLAY button pressed, release the VOLUME –button
and then release the PLAY button.
6 The test mode stops, and [ T E S T _ ] appears.
7 Press “VOLUME +”to check the version of the microcomputer.
(It is displayed on the remote control only.)
8 Press “VOLUME –” to light up the whole LCD.
1 High reflection disc MMD-110 (TEAC Test MD) 88GMMD-110
2 Low reflection disc MMD-213A (TEAC Test MD) 88GMMD-213A
3 Low reflection disc Recording mini disc UDSKM0001AFZZ
4 Extension cable Performance test (extension cable for motors) QCNWN6936AFZZ
5 Extension relay PWB Performance test (extension relay PWB for motors) RUNTK0613AFZZ
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 Parts No.
Note: Use the low reflection disc on which music has been recorded.
Figure 10
Leaving the TEST mode
1 PresstheSTOPbuttoninthetestmodestopstate,andwiththe
version displayed or the whole LCD on.
2 Update the rewritable area of EEPROM.
3 Switch to the stand-by mode.
Shipping setting method
(Perform it with the battery removed)
1 Keepholding downthe VOLUME –andthe PLAYbutton on the
main unit, and then plug in the AC adapter.
2 Make sure [INIT] changes to [BYE OK] on the main unit or the
remote control.
Extension Relay PWB
(RUNTK0613AFZZ)
Extension Cable
(QCNWN6936AFZZ)
MD Mechanism
Mechanism Flexible PWB
CN601
Operation Button
Flexible PWB Ass'y
(230)
CN451
CN101
MAIN PWB
Optical Pickup(17)