Sanyo JA20 User Manual

SERVICE
MANUAL
@SANYO
STEREO
AMPLIFIER
JA
20
(EUROPE)
ШИНЕ
ë
a
NOTE:
SPECIFICATIONS
The
below
mentioned
specifications
are
mainly
based
on
the
IHF
measurements
standard.
They
can
therefore
not
directly
be
compared
with
specifications
based
on
the
DIN
standard
or
other
standards.
Continuous
output
power
...........
20
W
x
2
(at
8
ohms,
1%
distortion)
Total
harmonic
distortion
...........
0.1%
(16
W
output,
8
ohms)
Input
sensitivity
and
impedance
PHONG
1.1.1...
Le
2.5
mV/47
kohms
AUX/TUNER/TAPEPLAY
........
150
mV/47
kohms
Phono
overload
level
...............
120
mV
RMS
(at
1
kHz)
Output
level
pai
jan
b.
.........
150
mV
Frequency
тео
S
GG.
10
Hz
—
40
kHz
(AUX)
Tone
control
response
BASS
С
2
ee
+8
dB
(at
100
Hz)
TREBEE2
eee
、。。。、.
+8
dB
(at
10
kHz)
High
filter
respone
an
KAN...
8
kHz
(—6
dB/oct.)
Loudness
control
response
(Vol.
—30
dB)
100
Hz/10
ketenes.
....
*8
dB/+4
dB
Signal
to
noise
таве
ЕЕ...
70
dB
Power
requirements
...............
AC:
220
V,
50
Hz
Power
consumption
TM...
90
W
AC
output
socket
.
.
ШШ
5...
AC:
18
V,
300
mA
(max.)
Dimensions
(Approx)
TET
E...
380
(W)
x
180
(D)
x
88
(H)
mm
шы
жч,
ж
ee
Ta
ЧА
(15-3/16"
x
7-1/8"
x
3-1/2")
Weight
(Approx)
ass
=
ere
sc.
3.6
kg
(7
Ibs.
15
ozs.)
*
Specifications
subject
to
change
without
notice.
WM-6567

Sanyo JA20 Specifications

General

Brand	Sanyo
Model	JA20
Category	Amplifier
Language	English

Summary

Audio Specifications

Continuous Output Power

Amplifier's continuous output power per channel at 8 ohms and 1% distortion.

Total Harmonic Distortion

THD percentage at a specified output and impedance.

Input Sensitivity and Impedance

Sensitivity and impedance for PHONO and AUX/TUNER/TAPE PLAY inputs.

Phono Overload Level

Maximum PHONO input voltage before distortion.

Output Level

TAPE REC output level.

Frequency Response

Frequency range for AUX input.

Tone Control Response

BASS and TREBLE control adjustment range.

High Filter Response

High filter cutoff frequency and slope.

Loudness Control Response

Loudness compensation at -30 dB volume.

Signal to Noise Ratio

Signal-to-noise ratio in dB.

Power Requirements

AC voltage and frequency for operation.

Power Consumption

Maximum power consumption.

AC Output Socket

Details of the AC output socket.

Dimensions

Physical dimensions in mm and inches.

Weight

Approximate weight in kg and lbs.

Front Panel Disassembly

LED Meter PCB Assembly

Adjustment Procedures

Bias Adjustment

Procedure for bias adjustment with specified conditions and settings.

Peak Level Meter Adjustment

Procedure for calibrating the peak level meter.

Exploded View Diagram

Main Circuit Overview

Switch Functions

Description of functions for various switches like FUNCTION, MONITOR, HIGH FILTER, LOUDNESS, POWER.

Control Functions

Details on functions of controls like VOLUME, BALANCE, BASS, and TREBLE.

Circuit Diagrams and Connections

Peak Level Meter Circuitry

Detailed schematic of the peak level meter and its associated components.

Power Supply and AC Input

Information on the AC power input, fuses, and power supply connections.

PCB Layout and Component Identification

Component Identification

List of integrated circuits and transistors with their part numbers and pin configurations.

Transformer and AC Input Connections