Description Of Major Ics - JVC CA-MXKA6 Service Manual

MX-KA6
Description of major ICs STK412-010 (IC301) : Dual low noise operational
1. Block Diagram
D2
TR1 TR2
C2
R1 C1
14
R4
TR3
TR4
R5
15
16
TR5
D1
R2
2. Test Circuit
1 2 3 4 5 6 7 8 9 10 11 12 13 14
+VH
100uF
/100V
+VL
100uF
1.5kohm
/50V
GND
100uF
/50V
-VL
100uF
/100V
-VH
1-22
13
R3
TR6
TR9
TR8
TR10
R6
TR7
R7
12 9 8 1110
*1
100ohm/1W
GZA GZA
15X 15X
100uF
/100V
1.5kohm
/1W
/1W
100uF
/100V
100ohm/1W
SUB.GND
R13
D12
TR12
TR16
TR19
C11
R11
C12
TR14 TR13
TR18
R14
TR20
R15
R16
TR15
TR17
R17
R12
*1
56kohm
*1 *1
3pF
56kohm
3pF
(*1)Metal Plate Cement Resistor 0.22ohm+-10%(5W)
TR41
18 17
R41
Comparator
TR11
D42
D43
D41
SUB
D51
D53
D52
Comparator
TR51
R51
15 16 17 18
100pF 100pF
2.2uF
1kohm
/50V
100uF 100uF
/10V /10V
2.2uF
1kohm
/50V
3uH
0.1uF
4.7ohm
4.7ohm/1W
4.7ohm/1W
3uH
0.1uF
4.7ohm
1
3
2
7
5
4
6
Ch2 IN
GND
Ch1 IN
Ch2 OUT
GND
Ch1 OUT