JVC MX-KA3 Service Manual

MX-KA3
1-29
1. Terminal layout
-+
+-
OUT1
- IN1
+IN1
VEE
Vcc
OUT2
- IN2
+IN2
 BA15218 (IC102) : Dual low noise operational amp.
 LA1823DIP (IC1) : 1chip AM/FM, MPX tuner system
Pin
No.
Symbol
Function
I/O
Pin
No.
Symbol
Function
I/O
2. Pin function
1. Block diagram
1 AM_RFIN I AMRF signal input
2 REG. -
3 AM_OSC - AM local oscillation circuit
4 VCC_1 - Power supply terminal
5
FM_MIXOUT O Output terminal for FM mixer
6 GND_1 - Ground
7
IF_BUFFER O IF buffer output
8 ST_IND O Stereo indicator output
9
AM_MIXOUT O Output terminal for AM mixer
10 FM_IF IN I Input of FMIF signal
11 AM_IF IN I Input of AMIF signal
12 AGC I AGC voltage input terminal
13 FM_DET O FM detection signal output
14
ST/MON_SW I Stereo/Monaural switching signal input
15
AM/FM_SW I AM/FM switching signal input
16 L_OUT O Output L-channel
17 R_OUT O Output R-channel
18 MPX_IN I Multiplex signal input
19 DET_OUT O AM/FM detection output
20 FM_OSC - FM local oscillation circuit
21 VCC_2 - Power supply terminal
22
FM_RFOUT O Output of FMRF signal
23 GND_2 - Ground
24 FM_RFIN I
Input of FMRF signal
24
FM
RF
FM
OSC
23
GND2
21
VCC2
20
FM
MIX
PHASE
COMP
15
PILOT
DET
14
FM
DET
1319 18
MUTE
17 16
DECODER
22
1 2 4 5 10 11 126 7 8 93
ST SW
FM
S-METER
AM
DET
VCO FF FF
TRIG
STSD
FF
AG
C
FM
IF
AM
IF
AM
RF
REG VCC1 GND1
AM
MIX
AM
OSC
OSC
B
UFFER
IF
B
UFFER

JVC MX-KA3 Specifications

General

Output Power	80 W per channel
Input Sensitivity/Impedance	300 mV/50 kΩ
Frequency Response	63 Hz - 12, 500 Hz
Wow And Flutter	0.15% (WRMS)
CD Capacity	3 CDs
Dynamic Range	85 dB
Signal-To-Noise Ratio	85 dB
FM Tuner Tuning Range	87.5 MHz - 108.0 MHz
AM Tuner Tuning Range	530 kHz - 1, 710 kHz
Dimensions	267 mm x 305 mm x 433 mm
Mass	7.5 kg
Type	3-way bass-reflex type
Woofer	13.5 cm cone
Mid	5 cm cone
Tweeter	2 cm dome
Power Handling Capacity	80 W
Impedance	6 Ω
Frequency Range	45 Hz - 22, 000 Hz
Sound pressure level	89 dB/W.m
Dimensions	228 mm x 316 mm x 258 mm
Mass	3.1 kg
Power Requirements	AC 120 V, 60 Hz
Power Consumption	125 W (power on mode)
Power Consumption in Standby Mode	17 W