Key Board - Sony MEX-BT2500 Service Manual

IC401 BD3444FS-E2
20 19 18 17 16
VCC/2 VCC
2
I C BUS
VCO
LOGIC
BASS:
• fc = 100Hz
• GAIN = ±20dB/1dB step
• Q = 1
1 2 3
– KEY Board –
IC901 LC75836WH-US-E
48 47 46 45
CCB INTERFACE
SHIFT REGISTER
1
P1/S1
2
P2/S2
3
P3/S3
4
P4/S4
5
S5
CONTROL
6
S6
REGISTER
7
S7
8
S8
9
S9
10
S10
11
S11
SEGMENT DRIVER & LATCH
S12 12
13 14 15 16
15 14 13 12
FADER FADER FADER FADER
BASS/TREBLE
PRIMARY VOLUME
(+12dB – -20dB/1dB step)
MUTE
INPUT GAIN
(0 – -20dB/1dB step)
INPUT SELECTOR
4 5 6
44 43 42 41 40 39 38 37
COMMON
DRIVER
CLOCK
GENERATOR
17 18 19 20 21 22 23 24
11
FADER:
0 – -62dB/1dB step
TREBLE:
• fc = 10kHz
• GAIN = ±20dB/1dB step
• Q = 1
7 8 9 10
36 COM2
35 COM1
34 S34
33 S33
32 S32
31 S31
30 S30
29 S29
28 S28
27 S27
26 S26
25 S25
MEX-BT2500
35