Ic Data - Yamaha CRX-E300 Service Manual

CRX-E300
QQ
3 7 63 1515 0
I IC DATA
IC301: BU2092 (INPUT P.C.B.)
Serial In / Parallel Out Driver
No. Name
1 VSS
2 DATA 1
3 CLOCK 1
4 LATCH 1
5 TUNER MUTE
6 MUTE A
7 LED
8 NC
9 SPRLY
10 PRLY
TE 11 V-DN
L 13942296513
12 V-UP
13 4051 1/2
14 4051 2A
15 4051 2B
16 4051 2C
17 VSS
18 VDD
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VSS 1
DATA 1 2
CLOCK 1 3
LATCH 1
4
TUNER MUTE 5
MUTE A
6
LED
7
NC 8
SPRLY 9
Tuner Mute out
Amp Mute out
LED
Speaker Relay Out
Power Relay Out
Motor VR Down Out
Motor VR Up Out
TC74HC4051A 1/2 Select Out
TC74HC4051A Control A Out
TC74HC4051A Control B Out
TC74HC4051A Control C Out
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8
18 VDD
17 VSS
Control 16 4051 2C
Circuit
4051 2B
15
14 4051 2A
4051 1/2
13
V-UP
12
11 V-DN
10 PRLY
Function
Q Q
3 6 7 1 3
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2 9 9 4 2 8
[1: MUTE ON]
[0: MUTE ON]
[0: ON, 1: OFF]
[0: ON, 1: OFF]
1 5 0 5 8 2 9 9 4
[0: IN-2, 1: IN-1]
[pull-up required]
[pull-up required]
[pull-up required]
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9 9
2 8 9 9