Hitachi HA-3800 Serviceanleitung

@HITACHI
SAFETY PRECAUTION
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.
critical parts in the power circuit block should not be replaced with other makers.
Critical parts are marked with
2, Before returning
safe to operate without
SPECIFICATIONS
Power output
(Both channels driven)
Power bandwidth
Frequency characteristics
TUNER, TAPE
PHONO
Harmonic distortion (8 ohms)
(at rated output)
(at 1/2 rated output)
Intermodulation distortion
(at 1/2 rated output)
Input sensitivity/lmpedance
PHONO
TUNER. AUX
TAPE PLAY
Output level
TAPE REC OUT
FEATURES
I. Super linear circuit
tion.
2. Equalizer circuit
S/ N ratio.
3. 14 LEDs power
SPECIFICATIONS
April
in the schematic diagram and circuit board diagram.
a repaired unit to the customer, the service technician
danger of electrical shock.
35 watts* per channel, min. RMS at 8
ohms from 20 Hz to 20 kHz. with no more
than 0.05% total hormonic distortion.
35W/ch + 35W/ch (8 ohms, 1 kHz,
T.H.D. 0.05%)
35W/ch + 35W/ch (4 ohms. 1 kHz,
T.H.D. 0.05%)
10 Hz — 30 kHz (8 ohms. 1/2 Rated
T.H.D. 0.1%)
20 Hz — 70 kHz (+0.5, —3.0 dB)
RIAA ±O.5dB
Less than 0.05%
Les than 0.05%
Less than 0.05%
2.5 mV/47 k-ohms
150 mV/40 k-ohms
150 mV/40 k-ohms
150 mV
• Measured pursuant to the Federal Trade Commission's Trade Regulation Rule on Power Output
Claims for amplifiers.
for low switching
with high sensitivity
indication.
AND PARTS ARE
STEREO
1981 TOYOKAWA
TY
CONTENTS
SPECIFICATIONS
FEATURES
ADJUSTMENT...............
DESCRIPTION
CHECKING
THE PROTECTION
CIRCUIT DIAGRAM
PRINTED
DISASSEMBLY
REPLACEMENT
FRONT AND
rnust thoroughly
Phono overload level
Signal-to-noise ratio (IHF A network)
PHONO
TUNER, AUX. TAPE
Damping factor
Bass control
Treble control
Loudness control
Subsonic filter
Power supply
Power consumption
Dimensions
Weight
distor- Electronic protection
4.
Connection
5.
and
speakers.
6. Sleek and chic
SUBJECT TO CHANGE
AMPLIFIER
No. 262EGF
HA-3800
.
.
OF THE NEW CIRCUITS.......4
OF THE OPERATION OF
CIRCUIT.. .. ..............6
WIRING BOARD
AND REPLACEMENT..
PARTS LIST
REAR PANEL
test the unit to ascertain that it is completely
200 mV (at 1 kHz)
80 dB
100 dB
30 (1 kHz, 8 ohms)
dB (100 Hz)
dB (10 kHz)
+6 dB (100 Hz)
+4 dB (10 kHz)
20 Hz
AC 120 V 60 Hz, -220
V 50/60 Hz or -120 V/220
240 v 50/60 Hz
110 W (at 1/10 rated output)
180 W (at 1/3 rated output)
300 W (at rated output)
435(W) x 83(H) x 299(D)
5.8 kg
circuit.
facilities for two
design.
FOR IMPROVEMENT.
WORKS
......3
.10
.12
. .14
17
Especially
V 50/60 Hz, -240
V/
mm
pairs of