JVC FS-H30, Руководство по обслуживанию

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(No.22062)1-37
4.13 LC75342 (IC302) : E. volume
• Terminal layout
• Block diagram
• Pin function
30 16 ~
1 15 ~
4
3
2
1
30
29
28
27
26 25 24 23 22 21
20
19
18
17
16
15
14
13
12
11
10 9 8 8 7 5
CONTROL
CIRCUIT
CONTROL
CIRCUIT
LOGIC
CIRCUIT
CCB
INTERFACE
LVref
RVref
Pin No. Symbol Function
1 DI Serial data and clock input for IC control
2 CE Chip enable
3 VSS GND
4 TEST Electric volume connection for test
5 LOUT Volume control and equalizer input
6 LBASS2 Connection for resistor and capacitor that
from the bass band filter
7 LBASS1
8 LTRE Connection for capacitor that from the treble
band filter
9 LIN Volume control and equalizer input
10 LSEL0 Input selector output
11 L4 Not used
12 L3 Input signal connections, not used
13 L2 Input signal connections
14 L1 Input signal connections
15 NC GND
16 NC GND
17 R1 Input signal connections
18 R2 Input signal connections
19 R3 Input signal connections, not used
20 R4 Not used
21 RSEL0 Input selector output
22 RIN Volume control and equalizer input
23 RTRE Connection for capacitor that from the treble
band filter
24 RBASS1 Connection for resistor and capacitor that
from the bass band filter
25 RBASS2
26 ROUT Volume control and equalizer input
27 NC Not used
28 VREF Connection to the 0.5X VDD voltage gener-
ator circuit used as the analog signal ground
29 VDD Power supply
30 CL Serial data and clock input for IC control
Pin No. Symbol Function