Jvc JA S310 Service Manual

Page 2

Features

* All-stage Direct-coupled Pure Complementary OCL
Circuit gives undistorted amplification with sufficient
negative feedback from direct current up to over
100kHz.

* Regulated plusminus dual power supply system and
differential equalizer with class A operation to get wide
dynamic range and low distortion.

* Direct phono terminal-torequalizer circuit connection
avoiding shielded wiring in the high impedance Phono
input circuit improves high frequency sound quality
giving clear and transparent highs.

Specifications

DIMENSIONS

* Impact Noise Killer to eliminate impact noise which may
damage the speakers when the power switch turns on and

off.

* High Cut Filter to eliminate tape hiss and record scratch

noise.

* Recording & Play~back through Microphone Mixing

Circuit.

High: 4-3/4(12.Icm) Width: 15-3/4(40.0cm) Depth: 11-3/8 (28.9cm)

WEIGHT
Net: 14.5 lbs. (6.6 kg) Gross: 16.5 lbs. (7.5 kg)

Transistor : 31
Diode : 7
Input Terminal ' PHONO, TUNER, AUX,
TAPE PLAY. MIC
SPEAKER SYSTEM 1 & 2
HEADPHONE JACK
TAPE REC

TAPE

Output Terminal

DIN Terminal
Output Power
Music Power (IHF) 100W (50W + 50W) 4n
80W (40W + 40W) 832
70W (35W + 35W) 49

64W (32W + 32W) 8:2

Continuous Power
(one channel driven)
1kHz 0.8%
Continuous Power
(both channel driven)
1kH z 0.8%
Power Band Width
Total Hamonic Distortion
(output power 22W)
Intermodulation Distortion :

50W (25W + 25W) 49
50W (25W + 25W) 89

10HZ~40kH2 8n IHF.
0.06% 1kHZ

Max. 0.8% at rated
output power
Max. 0.1% (1W)

Damping Factor
Load Impedance
Frequency Response

Tone Control Bass

Treble
Input Sensitivity
(input impedance)

Signal to Noise Ratio

Phono Over Load Level
Recording Output Level

Filter
Loudness Control

Volume at -30dB Position :

from Max.

Min. 50 (89, 1kHz)
4~16n
20Hz~30kHZ i0.5dB
IODHZ iIOdB

IOkHz iIOdB
Phono 2.5mV (47kg)
Mic 5mV (10km)

Tuner, Aux 165mV (50km)
Tape Play 165mV (50kn)

' Phono 63dB (RMSI

Aux BOdB (RMS) i
380mV (P-P)

135mV (RMS, IkHz)

Tape Rec. 160mV

DIN 30mV

High 9kHz, -6dB/oct

50Hz +11.5dB

1kHz +1 .SdB

IOkHz +4.5dB

POWE R SUPPLY

POWE R CONSUMPTION

JA-S310
No. 2355

"U" Type - 100,120,200,240V (Selectable) 50/60Hz
E" Type - 220V 50Hz

A" Type 7 240V 50Hz

66W

Page 8

Voltage Changeover

1. Remove the six screws from the Bottom Board, (see Fig.
10)

AC

FUSE PARTS NO.

LINE VOLTAGE "U" Type

"E" Type

"A" Type

100-120V QMF60R1-2R3

200724OV OMF60R1-1R2

QMF51A2-1R25

OMF60R1-1R2

Fig. 10

2. Remove the Bottom Board from the chassis.

3. The voltage select plug is located at the conner of the
chassis. Remove this select plug and change the position
of it so that the arrow points to the required voltage.
(see Fig. 11)

4. Replace the safety fuse as well as with one of
appropriate capacity.

AC LINE VOLTAGE FUSE
100 - 120V 2.3A
200 - 240V 1.2A

JA-SS10
No. 2355 _ 8 _

Fig. 11