Sharp md sr 50 service manual
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Page 1
MD-SR50H/50W/60E/60W Ð 2 Ð Figure 2-1 Figure 2-2 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. SAFETY PRECAUTION FOR SERVICE MANUAL VARO ! Avattaessa ja suojalukitus ohitettaessa olet alttiina nŠkymŠttšmŠlle lasersŠteilylle. €lŠ katso sŠteeseen. VARNING! Osynlig laserstralning nŠr denna del Šr šppnad och spŠrren Šr urkopplad. Betrakta ej strŠlen. 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. 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. Magnet Head Laser Beam Optical Pick-Up Main PWB Spindle motor Mechanism Chassis Laser Diode Properties l Material: GaAlAs l Wavelength: 785 nm l Pulse time: Read mode: 0.8 mW Continuous Write mode: max 10 mW 0.5S min cycle 1.5S Repetition VAROITUS! LAITTEEN KÄYTTÄMINEN MUULLA KUIN TÄSSÄ KÄYTTÖOHJEESSA MAINITULLA TAVALLA SAATTAA ALTISTAA KÄYTTÄJÄN TURVALLISUUSLUOKAN 1 YLITTÄVÄLLE NÄKYMÄTTÖMÄLLE LASERSÄTEILYLLE. VARNING - OM APPARATEN ANVÄNDS PÅ ANNAT SÄTT ÄN I DENNA BRUKSANVISNING SPECIFICERAS. KAN ANVÄNDAREN UTSÄTTAS FÖR OSYNLIG LASERSTRÅLNING, SOM ÖVERSKRIDER GRÄNSEN FÖR LASERKLASS 1. CAUTION Laser Diode Properties lMaterial: GaAIAs lWavelength: 785 nm lPulse time: Read mode; 0.8 mW Continuous Write mode; max. 10 mW 0.5S min. cycle 1.5S Repetition lThis Portable MiniDisc Recorder is classified as a CLASS 1 LASER product. lThe CLASS 1 LASER PRODUCT label is located on the bottom. l Use the Portable MiniDisc Recorder only in accordance with the instructions given inthis manual and do not attempt to interfere with the interlock switch or make any other adjustment as this may result in exposure to hazardous radiation. (MD-SR50H/SR60E) LASER KLASSE 1 LUOKAN 1 LASERLAITE KLASS 1 LASERAPP ARAT (MD-SR50W/SR60W) (MD-SR50H) Magnet head Optical pick-upTop Cabinet
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MD-SR50H/50W/60E/60W Ð 3 Ð FOR A COMPLETE DESCRIPTION OF THE OPERATION OF THIS UNIT, PLEASE REFER TO THE OPERATION MANUAL. SPECIFICATIONS Specifications for this model are subject to change without prior notice Input sensitivity: Output level: (MD-SR50H/SR50W) Output level: (MD-SR60W/SR60E) Dimensions:Width: 99.9 mm (3-15/16") Height: 22.9 mm (29/32") Depth: 77.9 mm (3-3/32") Weight:168 g (0.37 lbs.) without battery ( MD- SR50H/SR50W) Weight:191 g (0.42 lbs.) with rechargeable ( MD- SR60W/SR60E)battery Input socket:Line/optical digital, microphone (powered by the main unit) Output socket:Earphones (impedance: 32 ohms) ( MD- SR50H/SR50W) Output socket:Headphones (impedance: 16 ohms)/ ( MD- SR60W/SR60E)remote control unit MiniDisc Recorder Type:Portable MiniDisc recorder Signal readout:Non-contact, 3-beam semi-conductor laser pick-up Audio channels:Stereo 2 channels/monaural (longplay mode) 1 channel Frequency response:20 - 20,000 Hz (± 3 dB) Rotation speed:Approx. 400 - 900 rpm Error correction:ACIRC (Advanced Cross Interleave Reed-Solomon Code) Coding:ATRAC (Adaptive Transform Acoustic Coding), 24-bit computed type Recording method:Magnetic modulation overwrite method Sampling frequency:44.1kHz (32 kHz and 48kHz signals are converted to 44.1kHz, and then recorded) Wow and flutter:Unmeasurable (less than ±0.001% W. peek) General Power source: DC 5V : AC adaptor (AC 220-230V, 50/60 Hz) (MD-SR50H)DC 1.5V: Commercially available, "AA" (LR6) size, alkaline battery x 1 DC 1.2V: Optional rechargeable Nickel-Metal Hydride battery (AD-N70BT) x 1 DC 4.5V: Optional car adaptor, AD-CA20X (for cars with a 12-24V DC negative earth electrical system) Power source: DC 5V : AC adaptor (AC 110-240V, 50/60 Hz) (MD-SR50W)DC 1.5V: Commercially available, "AA" size (LR6), alkaline battery x 1 DC 1.2V: Optional rechargeable Nickel-Metal Hydride battery (AD-N70BT) x 1 DC 4.5V: Separately available car adaptor, AD-CA20X (for cars with a 12-24V DC negative earth electrical system) Power source:DC 1.2V: Rechargeable Nickel-Metal Hydride (MD-SR60E) battery (AD-N70BT) x 1 DC 5V : AC adaptor (AC 230-240V, 50/60 Hz)DC 1.5V: Commercially available, "AA" size (LR6), alkaline battery x 1 DC 4.5V: Separately available car adaptor, AD-CA20X (for cars with a 12-24V DC negative earth electrical system) Power source:DC 1.2V: Rechargeable Nickel-Metal Hydride (MD-SR60W) battery (AD-N70BT) x 1 DC 5V : AC adaptor (AC 220V, 50 Hz)DC 1.5V: Commercially available, "AA" size (LR6), alkaline battery x 1 DC 4.5V: Separately available car adaptor, AD-CA20X (for cars with a 12-24V DC negative earth electrical system) Power consumption: 7W (AC adaptor) (MD-SR50H/60E)Power consumption: 0.15A (AC adaptor) (MD-SR50W)Power consumption: 6W, 0.06A (AC adaptor) (MD-SR60W)Output power:RMS; 20 mW (10 mW + 10 mW) (0.2 % T.H.D.) Charging time:Approx. 3.5 hours (90%) Approx. 5.5 hours (fully charged) (When using the AC adaptor included with the unit) Battery life: (MD-SR50H/SR50W) Battery life: (MD-SR60W/SR60E) The continuous recording time is for analogue input when the volume level is set to "VOL 0" The continuous play time shows the value when the volume level is set to "VOL 15" The above values are the standard values when the unit is charg- ed and used at an ambient temperature of 20ûC (68ûF). Earphones Ñ 10 mW + 10 mW 32 ohms LINE 250 mV (-12 dB) Ñ 10 kohms Maximum output levelLoad impedance Specified output When using a commercially available, high capacity, "AA" (LR6) size, alkaline batteryWhen using the optional rechargeable batter AD-N70BT(full charged) Continuous recording Approx. 3 hours Continuous recording Approx. 4.5 hours Continuous play Approx. 7 hours Continuous play Approx. 6.5 hours MIC H 0.25 mV 10 kohms MIC L 2.5 mV 10 kohms LINE 100 mV 20 kohms Recording levelReference input levelinput impedance When using a commercially available, high capacity, "AA" size (LR6), alkaline batteryWhen using the rechargeable batter (full charged) included with the unit Continuous recording Approx. 3 hours Continuous recording Approx. 4.5 hours Continuous play Approx. 7 hours Continuous play Approx. 6.5 hours Headphones Ñ 10 mW + 10 mW 16 ohms LINE 250 mV (-12 dB) Ñ 10 kohms Maximum output levelLoad impedance Specified output The operation time when using an alkaline battery may be different, depending on the type and manufacturer of the battery and on the operating temperature.
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MD-SR50H/50W/60E/60W Ð 3 Ð FOR A COMPLETE DESCRIPTION OF THE OPERATION OF THIS UNIT, PLEASE REFER TO THE OPERATION MANUAL. SPECIFICATIONS Specifications for this model are subject to change without prior notice Input sensitivity: Output level: (MD-SR50H/SR50W) Output level: (MD-SR60W/SR60E) Dimensions:Width: 99.9 mm (3-15/16") Height: 22.9 mm (29/32") Depth: 77.9 mm (3-3/32") Weight:168 g (0.37 lbs.) without battery ( MD- SR50H/SR50W) Weight:191 g (0.42 lbs.) with rechargeable ( MD- SR60W/SR60E)battery Input socket:Line/optical digital, microphone (powered by the main unit) Output socket:Earphones (impedance: 32 ohms) ( MD- SR50H/SR50W) Output socket:Headphones (impedance: 16 ohms)/ ( MD- SR60W/SR60E)remote control unit MiniDisc Recorder Type:Portable MiniDisc recorder Signal readout:Non-contact, 3-beam semi-conductor laser pick-up Audio channels:Stereo 2 channels/monaural (longplay mode) 1 channel Frequency response:20 - 20,000 Hz (± 3 dB) Rotation speed:Approx. 400 - 900 rpm Error correction:ACIRC (Advanced Cross Interleave Reed-Solomon Code) Coding:ATRAC (Adaptive Transform Acoustic Coding), 24-bit computed type Recording method:Magnetic modulation overwrite method Sampling frequency:44.1kHz (32 kHz and 48kHz signals are converted to 44.1kHz, and then recorded) Wow and flutter:Unmeasurable (less than ±0.001% W. peek) General Power source: DC 5V : AC adaptor (AC 220-230V, 50/60 Hz) (MD-SR50H)DC 1.5V: Commercially available, "AA" (LR6) size, alkaline battery x 1 DC 1.2V: Optional rechargeable Nickel-Metal Hydride battery (AD-N70BT) x 1 DC 4.5V: Optional car adaptor, AD-CA20X (for cars with a 12-24V DC negative earth electrical system) Power source: DC 5V : AC adaptor (AC 110-240V, 50/60 Hz) (MD-SR50W)DC 1.5V: Commercially available, "AA" size (LR6), alkaline battery x 1 DC 1.2V: Optional rechargeable Nickel-Metal Hydride battery (AD-N70BT) x 1 DC 4.5V: Separately available car adaptor, AD-CA20X (for cars with a 12-24V DC negative earth electrical system) Power source:DC 1.2V: Rechargeable Nickel-Metal Hydride (MD-SR60E) battery (AD-N70BT) x 1 DC 5V : AC adaptor (AC 230-240V, 50/60 Hz)DC 1.5V: Commercially available, "AA" size (LR6), alkaline battery x 1 DC 4.5V: Separately available car adaptor, AD-CA20X (for cars with a 12-24V DC negative earth electrical system) Power source:DC 1.2V: Rechargeable Nickel-Metal Hydride (MD-SR60W) battery (AD-N70BT) x 1 DC 5V : AC adaptor (AC 220V, 50 Hz)DC 1.5V: Commercially available, "AA" size (LR6), alkaline battery x 1 DC 4.5V: Separately available car adaptor, AD-CA20X (for cars with a 12-24V DC negative earth electrical system) Power consumption: 7W (AC adaptor) (MD-SR50H/60E)Power consumption: 0.15A (AC adaptor) (MD-SR50W)Power consumption: 6W, 0.06A (AC adaptor) (MD-SR60W)Output power:RMS; 20 mW (10 mW + 10 mW) (0.2 % T.H.D.) Charging time:Approx. 3.5 hours (90%) Approx. 5.5 hours (fully charged) (When using the AC adaptor included with the unit) Battery life: (MD-SR50H/SR50W) Battery life: (MD-SR60W/SR60E) The continuous recording time is for analogue input when the volume level is set to "VOL 0" The continuous play time shows the value when the volume level is set to "VOL 15" The above values are the standard values when the unit is charg- ed and used at an ambient temperature of 20ûC (68ûF). Earphones Ñ 10 mW + 10 mW 32 ohms LINE 250 mV (-12 dB) Ñ 10 kohms Maximum output levelLoad impedance Specified output When using a commercially available, high capacity, "AA" (LR6) size, alkaline batteryWhen using the optional rechargeable batter AD-N70BT(full charged) Continuous recording Approx. 3 hours Continuous recording Approx. 4.5 hours Continuous play Approx. 7 hours Continuous play Approx. 6.5 hours MIC H 0.25 mV 10 kohms MIC L 2.5 mV 10 kohms LINE 100 mV 20 kohms Recording levelReference input levelinput impedance When using a commercially available, high capacity, "AA" size (LR6), alkaline batteryWhen using the rechargeable batter (full charged) included with the unit Continuous recording Approx. 3 hours Continuous recording Approx. 4.5 hours Continuous play Approx. 7 hours Continuous play Approx. 6.5 hours Headphones Ñ 10 mW + 10 mW 16 ohms LINE 250 mV (-12 dB) Ñ 10 kohms Maximum output levelLoad impedance Specified output The operation time when using an alkaline battery may be different, depending on the type and manufacturer of the battery and on the operating temperature.