SERVICE MANUAL
HT-65S
SPECIFICATIONS
Type
2-speed direct drive automatic
Platter
Aluminum
diameter
Motor
Brushless,
' 'Unitorque"
Spev,d
2•speeds; 33-1/3 and 45 rpm
Speed change
system
Electronic
SIN
78 dB
Wow
and
Flutter
C025%
Speeo
•teviation
0003%
Speed
drift
(for time)
0003%/hour
(for temperature)
0003%
Effective
length
220
Overhang
15 mm
Track.;ng
error
Lead wire
capacitance
140 pF
Adjustable
force
range
(sca:e)
O — 3 g/ 1 turn of the
(directly
Acceptable
cartridge
weight
4—9
When
a HITACHI
cartridge
Cartridge
Dual magnet type (MT-35)
Frequency
response
10
FEATURES
1.
Unitorque
motor
2.
Manual
priority
and two-motor
mechanism.
3.
Electronic
return
SENSOR
SYSTEM).
4.
Hitachi's
own
HARC
Compound)
SPECIFICATIONS
DIRECT
August
HT-66S
system
alloy die-cast, 310 mm outer
slotless.
coreless
DC servo
motor
change-over
system
WBMS
(5 -
35
mm
balance weight
readable in O
g steps)
g
is attached.
25,000 Hz
with
quartz
lock servo
fully
automatic
detection
mechanism
(PHOTO-
(Hitachi
Anti-Resonance
AND
PARTS
ARE SUBJECT
DRIVE
AUTOMATIC
1981
TOYOKAWA
HT-65S
HT-66S
CONTENTS
SPECIFICATIONS
FEATURES
SERVICE
POINTS
ADJUSTMENTS
DESCRIPTION
CIRCUIT
DIAGRAM
PRINTED
WIRING
REPLACEMENT
EXPLODED
VIEW
TROUBLESHOOTING
BLOCK
DIAGRAM
Output
voltage
2.5
mV at
Channel
difference
dB
Channel
separation
23 dB at I kHz
Tracking
force
1.5 — 2b g (recommended
Sty:as
tip
Diamond
Power
source
120 V 60 Hz for
standard
220 V 50 Hz for Europe
240
standard
110
Asian
Power
consumption
8 watts
Dimensions
435
(17M /8"
Weight
6.0 kg (132 ibso
Other
devices
Auto in, auto repeat. auto return. auto
cut, anti-skating, track:vg force direct-
reading balance weight,
cueing, repeat indicatc.,
indicator.
auto-speed,
one-touch
only))
Highly sensitive straight
tone arm with gimbal support
5.
6.
Front panel operation
with soft fingertip
switches
Viscous damped arm lifter never damages stylus
7.
8.
Easy-to-operate
ONE-TOUCH
9.
Remote
controlled
operation
TO CHANGE
FOR IMPROVEMENT.
TURNTABLE
WORKS
No.
286EGF
.
OF THE NEW
CIRCUITS
BOARD
PARTS
LIST
1 kHz
50 mm/
sec.
at 1 kHz
2 g)
stylus
(DS-ST 35)
A
and
Canada
standard
V 50 H2 for
u.K,
ana
Austrana
12C/220
-
240
V 50:60
and
I-atin
American
coun:ries
x 365
x
mm
Y. 14
x
vtscous damped
quartz locked
speed indicaa.,l, auto-size,
remote controi
terminal and
control
terminal
(HT-66S
touch
SYSTEM
(HT-66S)
(HT-66S)
1
3
6
. 10
13. 15
14. 16
.22
.24
.33