Hitachi HA-2800 Service Manual

No.
263 EGF
HA-2800
HA-1800
CONTENTS
SPEC|F|CAT|ONS..
..'.....'..1
FEATURES..
.......3
DESCRIPTION OF
THE
NEW
CIRCUIT.....3
BLOCK DIAGRAM
,..,..4
PRINTED WIRING BOARD
......"."5
crRcutT
DTAGRAM
........6
RPTNTED WtRtNG BOARD
.....'........'..'.7
CIRCUIT
DIAGRAM
.....".."8
DISASSEMBLY AND REPLACEMENT.......9
REPLACEMENT
PARTS LIST...."'10,11,12,13
FRONT AND
REAR PANEL
.................14
SAIETY
PRECAUTION
SPECIFICATIONS
Power
output
(Both
channels driven)
Power
bandwidth
Frequency characteristics
TUNER. AUX
(HA.I
8OO). TAPE
PHONO
Harmonic distùrtion
(8
ohnrs)
(at
rated output)
(at
I
/l
rated output)
lnlernrodulation
distortion
(at
I
/2
rated
output)
lnpuî
sensitivity/lmpedanee
PHONO
TUNER, AUX(HA-r800)
TAPE PLAY
25 watts*
per
channel,
min.
RMS, at
8
ohms
from 40
Hz
to
20 kHz, with
no
more
than
O.l%
toîal
harmonic
distortion.
15
W/ch
+
l5
W/ch
(4/8
ohms. I
kHz.
T H.D..0
l%)
l0 Hz
-30
kHz
(8
ohrns. T
H.D 0.1% l/l
Rated)
l0 Hz
-
40
kHz
(+l
0.-30
dB)
RIAA
t
0.5 dB
Less
than
0 l%
kss than
0.1%
kss than 0.1%
1.5 mVi47 k-ohms
150 nrV/40
k-ohms
150 mV/40
k-ohms
Output level
TAPE REC
OUT
Phono overload level
(at
I
kHz
)
Signal-to-noise
ratio
(lHF,
A network)
PHONO
TUNER, AUX
(HA-I
8OO). TAPE
Damping
lactor
Bass
control
Treble
control
L.oudhess control
Subsonic fìlter
Power
supply
Power
consumption
Dmensions
Weight
150 mV
ll0 mV
7l dB
93 dB
20
(l
kHz" 8 ohms)
t8dB(l00Hz)
t8dB(l0kHz)
+6dB(l00Hz)
+
4 dB
(10
kHz)
l0
Hz
AC I
20
V
60 Hz,
-
210 V 50/60 Hz
-
240V 50/ó0 Hz
or
-
I 20 V/ll0 v
1240
V 5o160 Hz
90
W (at
l/10
rated ourput)
140
W
(at
I
/3
rated ourput)
210
W
(at
rated out!ut)
435
(W)
x
83
(H)
x
243
(D)
mm
4 8
kg
(HA-2800)
4.6
kg
(HA-l
800)
tMeasured
pursuant
to
the
Federal
Trade
Commission's Trade
Regulation
Rule on Power Output
Claims
for
Amplifiers.
The following
precautions
should be
observed when
servicing
1. Since
many
parts
in the unit have
special
safety related
characteristics,
always use
genuine
Hitachi's
replacement
parts
Especially
critical
parts
in the
power
circuit
block should not be replaced with other
makers.
Critical
parts
are
marked with
A
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
that
it
is
completely
safe
to
operate
without danger of electrical
shock
SPECIFICATIONS
AND PARTS
ARE
SUBJECT
TO
CHANGE FOR IMPROVEMENT.
STEREO
AMPLIFIER
May 1981 TOYOKAWA WORKS

Hitachi HA-2800 Specifications

General

Brand	Hitachi
Model	HA-2800
Category	Amplifier
Language	English