Hitachi HMDR 50 Service Manual

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-“ 2 -“ AX-F300 Check that exposed parts are acceptably insulated from the supply circuit before returning the repaired instrument to the customer. -    Checking method Checking methodChecking method Checking method Checking method Measure the resistance value between the both poles of attachment cup (Power supply plug) and the exposed parts (Parts such as Knob, Cover, etc. where the cus- tomer is easy to touch.) and check that the resistance value is 500 kohms or more. INSTRUMENT (Exposed part) Insulation tester (DC 500V) SAFETY PRECAUTIONS SAFETY PRECAUTIONSSAFETY PRECAUTIONS SAFETY PRECAUTIONS SAFETY PRECAUTIONS The following precautions should be observed when servicing. 1. Since many parts in the unit have special safety-related characteristics, always use genuine Hitachis replacement parts. Especially critical parts in the power circuit block should not be replaced with other makers. Critical parts are marked with in the circuit diagram and printed wiring board. 2. Before returning a repaired unit to the customer, the service technician must thoroughly test the unit to ascertain that it is completely safe to operate without danger of electrical shock.

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-“ 3 -“ AX-F300


       Reception frequency band: (FM:87.5~108.0MHz(100kHz step) AM:520~1710kHz(10kHz step))   (FM:87.50~108.00MHz(50kHz step) MW:522~1611kHz(9kHz step) LW:153~281kHz(1kHz step))  (FM:87.50~108.00MHz(50kHz step) AM:522~1611kHz(9kHz step) 520~1710kHz(10kHz step))  (FM:76.00~108.00MHz(50kHz step) AM:522~1629kHz(9kHz step) 520~1710kHz(10kHz step)) Rated output power: 40 W + 40 W (6W/ohms, 1kHz, T.H.D. 10%) Audio input / output jacks: CD input jacks, TAPE input/output jacks, AUX input jacks, MD input/output jacks, PRE OUT (MONO) jack, headphones jack Power supply: E,EBS : AC 230 V, 50 Hz UC : AC 120 V, 60 Hz W,WUN : AC 110~127 V, 50/60 Hz AC 220~240 V, 50/60 Hz Power consumption: 74 W (ECO-ON mode : 0.8 W) Maximum external dimensions: 210 (W) -ˆž 96.5 (H) -ˆž 350 (D) mm (including feet, controls and terminals) Weight: 4.5 kg
     Sampling frequency: 44.1kHz Optical source: Semiconductor Power supply: E,EBS : AC 230 V, 50 Hz UC : AC 120 V, 60 Hz W,WUN : AC 110~127 V, 50/60 Hz AC 220~240 V, 50/60 Hz Power consumption: 12 W Maximum external dimensions: 210 (W) -ˆž 96.5 (H) -ˆž 340 (D) mm (including feet, controls and terminals) Weight: 3.2 kg
    System: 2 way BASS Reflex Speaker System Woofer: 10 cm -ˆž 1 Tweeter: 5 cm -ˆž 1 Impedance: 6 ohms Maximum external dimensions: 150 (W) -ˆž 275 (H) -ˆž 227 (D) mm Weight: 3.0 kg (1 speaker)
  System: Digital Quartz Clock Display Format: 12-hour cycle (UC DEST) 24-hour cycle (other DEST) Timer Accuracy: Within 60 seconds at monthly rate
     Remote control system: Infrared pulse Power supply: Two DC 1.5V R6P/AA batteries Maximum external dimensions: 54 (W) -ˆž 27 (H) -ˆž 172.5 (D) mm Weight: 145g (including batteries)
       Type: MiniDisc digital audio system Wow & flutter: Below measurable limits (±0.001% W. peak or less) Sampling frequency: 44.1 kHz Recording method: Magnetic modulation overwriting Light source: Semiconductor Laser Power supply: E,EBS : AC 230 V, 50 Hz UC : AC 120 V, 60 Hz W,WUN : AC 110~127 V, 50/60 Hz AC 220~240 V, 50/60 Hz Power consumption: 14 W Maximum external dimensions: 210 (width) -ˆž 96.5 (height) -ˆž 320 (depth) mm (including feet, controls and terminals) Weight: 2.6 kg Specifications are subject to change or performance improvement without notice.