Hitachi HT-353 Serviceanleitung

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SERVICE MANUAL
SPECIFICATIONS
Type 2-speed direct drive system Output voltage 3.5 mV at 1 kHz 50 mm/sec.
Platter Aluminum alloy die-cast, 324 mm Channel difference 1 dB at 1 kHz
outer diameter Channel separation 20 dB at 1 kHz
Motor Brushless DC servo direct drive Tracking force 1.5 — 2.5 g (recommended 2 g)
motor Stylus tip Diarnond stylus (DS-ST26})
Speed 2-speeds ; 33-1/3 and 45 rpm Power source 120 V GO Hz for U.S.A. & Canada
Speed change system Etectronic change-over system standard
S/N 70 dB (DIN-B) 220 V 50 Hz for Europe standard
Wow & Flutter 0.03% WRMS 240 V 50 Hz for U.K. & Australia
Speed deviation 0.003% standard
Speed drift (for time) 0.003%/hour 120/220 V 50/60 Hz for Asia &
(for temperature) 0.003% (5 — 35°C} Latin America countries
Effective length 220 mm Power consumption 5.5 watts
Overhang 15 mm Dimensions 454 x 390 x 144 mm (17-7/8 x
Tracking error 2° 15-11/32 x 5-21/32'')
Adjustable force range Weight 6 kg (13.2 Ibs.)
(scale) 0 — 3 g/1 turn of the scale ring Other devices Auto return, auto cut, anti-skat-
(directly readabie in 0.1 g steps) ing, tracking force direct-reading
Acceptable cartridge balance weight, straboscope and
weight 4-—10g neon lamp, viscous damped cue-
When a HITACHI cartridge is attached. ing.
Cartridge Vertical moving magnet type
(VFS-261) Design and specifications subject to change without notice
Frequency response 20 ~ 20,000 Hz tor further improvement.
oS ree ee ee
| 1. Uni-torque motor 6. Structure resistant to howling
| 2. Quartz control (quartz lock PLL servo) 7. Handy automatic mechanism
3. Easy-to-operate front panel controls 8. Easy-to-see single-pattern strobo
4. Large-sized platter 9. Viscous damped arm lifter never damages stylus tip
5. Employment of the low center of gravity tonearm 10. Easily removable dust cover
DIRECT DRIVE TURNTABLE
August 1978