Hitachi HT-L70 Serviceanleitung

@HITACHI
SERVICE
SAFETY PRECAUTION
The following precautions
1. Since many parts in the unit have special safety related characteristics,
parts in the power circuit
Critical parts are marked with
2. Before returning
safe to operate without
SPECIFICATIONS
Type
Platter
Motor
Speed
Speed change system
SIN
Wow and Flutter
Speed deviation
Speed drift
(for time)
(for temperature)
Tonearm
Effective length
Tracking error
Lead wire capacitance
Adjustable force range
SPECIFICATIONS
DIRECT
December
MANUAL
should be observed when servicing
block should not be replaced with other makers.
in the schematic
a repaired unit to the customer,
danger of electrical shock.
2-speed quartz controlled direct
automatic turntable
Aluminum alloy dieu•st, 300 mm outer
diameter
Brushless, Slotiess, Coreless
"unitorque" motor
2-speeds, 33-1/3 and 45 rpm
Electronic change-over system
78 dB (DIN 8)
0 025% (WRMS)
0003%
0.003% (5 — 350C)
Dynamic balance type
Linear tracking tonearm
95 mm
140 pF
O — 2 g(directly readable in 0.25 g steps)
AND PARTS
DRIVE
1981
CONTENTS
SPECIFICATIONS
FEATURES
RECORD
SERVICE
PRINTED
CIRCUIT
BLOCK
ADJUSTMENTS
REPLACEMENT
EXPLODED
always use genuine Hitachi's replacement
diagram and circuit board diagram.
the service technician must thoroughly
drive fully Acceptable
cartridge
Cartridge
Frequency
DC servo Output voltage
Channel difference
Channel separation
Tracking
Stylus tip
Power source
Power consumption
Dimensions
Weight
ARE SUBJECT TO CHANGE
AUTOMATIC
TOYOKAWA
.
PLAY AND PRECAUTIONS
POINTS .
WIRING BOARD
DIAGRAM
DIAGRAM
PARTS LIST
VIEW .
parts. Especially critical
test the unit to ascertain that it is completely
weight
MM type (MT 70)
response 10 25,000 Hz
2.5 mV at 1 kHz, 50 rnm/sec.
1 dB at I kHz
23 dB at 1 kHz
1.5 g
force
Diamond stylus (DS-ST70)
120 V 60 Hz for U.S.A.
standard
220 V 50 Hz for Europe
240 V 50 Hz for U.K.
standard
110-120/220-240
and Latin American
17 watts
315 x 83 (H)
5 kg (11 lbs.)
FOR IMPROVEMENT.
TURNTABLE
WORKS
1
3
4
6
11
. 12
13
14
17,20
.20
and Canada
standard
and Australia
V 50/60 Hz for Asian
countries
x 315 (D)mm