JVC KS-FX820R, Service Manual

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KS-FX850R/KS-FX835R/KS-FX820R
2-12
2. Pin function
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
PBTC1
PBOUT1
OUTREF1
TAPEIN1
Vcc
NC
LINEOUT1
TCH1
NC
MSLPF
G2FB
G1FB
MSTC
MSOUT
NC
NRSW
MUTESW
TAPESW
DRSW
MSMODE
MSSW
NC
TCH2
LINEOUT2
Pin No. Symbol
-
O
O
I
-
-
O
-
-
-
-
-
-
O
-
I
I
I
I
I
I
-
-
O
Playback equalizer amplifier
capacitance
Playback equalizer amplifier
output
Output reference
TAPE input
Power supply
Line output
Time constant for the HLS
Cut-off frequency adjustment
of the music sensor LPF
Music signal interval detection
Music signal interval detection
Time constant for detecting
music signal interval
Music sensor out
No use
Dolby NR control
Mute function control
Playback equalizer amplifier
control
Head select control
Music sensor mode control
Music sensor control
Time constant for the HLS
Line output
I/O Function
Pin No. Symbol
I/O Function
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
DIREF
GND
TAPEIN2
OUTREF2
PBOUT2
PBTC2
PBFB2
PBRIN2
PBGND
PBFIN2
VCT
PBREF
PBFIN1
PBGND
PBRIN1
PBFB1
-
-
I
O
O
-
I
I
-
I
O
O
I
-
I
I
Resistance for setting the
reference
Ground
TAPE input
Output reference
Playback equalizer amplifier
output
Playback equalizer amplifier
capacitance
Playback equalizer amplifier
feedback
Playback equalizer amplifier
input
Playback equalizer amplifier
ground
Playback equalizer amplifier
input
Center
Playback equalizer amplifier
reference
Playback equalizer amplifier
input
Playback equalizer amplifier
ground
Playback equalizer amplifier
input
Playback equalizer amplifier
feedback
PBFB2
PBRIN2
PBGND
PBFIN2
VCT
PBREF
PBFIN1
PBGND
PBRIN1
PBFB1
MSMODE
DRSW
TAPESW
MUTESW
NRSW
MSOUT
MSTC
G1FB
G2FB
PBTC2 PBOUT2 OUTREF2 T
APEIN2
GND DIREF LINEOUT2 TCH2 NC MSSW
PBTC1
PBOUT1
OUTREF1
T
APEIN1
Vcc
NC
LINEOUT1
TCH1
NC
MSLPF
1 2 3 4 5 6 7 8 9 10
30 29 28 27 26 25 24 23 22 21
20
19
18
17
16
15
14
13
12
11
31
32
33
34
35
36
37
38
39
40
7k/12k
300k
F2
F1
30k
30k
45k
300k
7k/12k
F3
OFF/B
100k
T1
-
+
+ -
70 /120
70 /120
x1
x1
T2
100k OFF/B
NR
NR
BIAS
MUTE
TAPE EQ
FWD/RVS
LPF +
-
DET
Vcc
MS MODE
NR MODE
MS ON/
OFF
- +
NC
+
-
1.Pin layout & block diagram
CXA2560Q (IC401) : Dolby B type noise reduction system with play back equalizer amp.
Descrption of major ICs