Hitachi HT-20S Serviceanleitung

CONTENTS
SPECIE FICATIONS . ee
FEATURES (2 08e a eee ere ee
ADJUSTMENTS 52) See re es
EXPLODED VIEW..... Sea
REPLACEMENT PARTS LIST edie 91
CIRCUIT. DIAGRAM 20k le ea ee
PRINTED WIRING BOARD Goer ee cee 4
1
3
SERVICE POINTS. §. se. 0osc pclae 8
8
8
si Ss a eS NR SEE ES REDCAR MOTI
SAFETY PRECAUTIONS
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The following precautions should be observed when servicing.
:
1. Since many parts in
the unit have special safety
related characteristics,
always use genuine Hitachi
Especially critical parts in the power circuit block should not be replaced with other makes.
Critical parts are marked with
/\ in the schematic diagram and circuit board diagram.
2. Before returning
a repaired unit to the customer, the
service technician must thoroughly
test the unit to ascertain
Mat it is
completely safe to operate without danger of electrical shock.
:
é
replacement parts.
eR CIC ECE NEL BEL
sumaenanssosicnenshntsesaanttaneantnsestheessaithnsenteaneasatae reso NOONE CIID AARNE NERA ALONE EMMERSON NELSON EN ESN SIAN THUS ORONA SCRE UDI ASAE OSEAN OHARA AE ARMENIAN AAO treenarsinens cteacninonteaogiinia
_ 2-speed belt drive system Frequency response 10 — 25,000 Hz
Platter
Aluminum alloy die-cast, 310 mm outer
Output voltage 2.5mV
(MT-35) or 3mV (MT-15)
diameter at 1 kHz 50 mm/sec.
Canada)
Moving magnet type (MT-15) (except
U.S.A. & Canada)
cit as cu NNO A SRLS AIA EE SEO EEA OER ATT NOIRE ea ARAL NMSA SSRN E — we ct Ss m ye
SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT.