Yamaha TYROS 2 Service Manual page 42

Digital workstation / monitor speaker
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Tyros2
M51132L (XE470A00)
VCA
AJK: IC3
Refarence Voltage
1
Filter
2
NC
3
GND
4
Controled
Volume/Volume2 control
5
Voltage
Noise reduction
6
Balance/VOLUME2
7
Pass/VCA Switching
8
Switching
UPD16875G-E2-A (X4722A00)
USB Power switch
HUB: IC004
DM: IC904,IC906
CTL1
1
FLG1
2
FLG2
3
CTL2
4
PIn No.
Pin Name
1/4
CTL1/CTL2
2/3
FLG1/FLG2
6
7
8/5
OUT1/OUT2
42
LA6517M (XT131A00)
Dual Power Operational Amplifier
AJACK: IC003
AJK: IC6
OUT1
16
IN1
15
VDD
14
Regulater
NC
13
NC
12
IN2
11
OUT2
10
Balance/Indivdual
9
Volume control
OUT1
8
(Output 1)
Reference
voltage
Overcurrent
OUT1
8
detection block
IN
2
FLG1
7
(Flag output 1)
GND
6
OUT2
5
6
GND
Pin Function
Control input: Active-low, TTL input
Detection flag (output): Active-low,Nch open-drain
GND
Ground
IN
Power input: Source of MOSFET for output. Power supply to internal circuitry of IC.
Switch output: Drain of MOSFET for output. Usually, connected to load.
1
16
NC
NC
2
15
NC
NC
3
14
OUT 1
INPUT -1
Amp1
4
13
VCC
INPUT +1
Thermal Shut
Doun and
Current Limiter
OUT 2
5
12
INPUT +2
Amp2
VEE
6
11
INPUT -2
NC
7
10
NC
8
9
NC
NC
IN (Input)
7
5 OUT2
(Output 2)
Reference
voltage
Gate
Gate
Overcurrent
control
control
detection block
g e
Overvoltage
t a
v o l
e r
O v
4 FLG2
t
lockout circuit
c u i
c i r
u t
k o
l o c
(Flag output 2)
Thermal
l
m a
e r
T h
shutdown circuit
u i t
i r c
n c
o w
u t d
s h
1
4
CTL1
CTL2
(Control input 1)
(Control input 2)
NJM12904M(TE1) (X5475A00)
Dual Operational Amplifier
LCL: IC1
+DC Voltage
Output A
1
+V
8
Supply
Inverting
Output B
2
7
Input A
-
+
Inverting
Non-Inverting
3
6
+
-
Input A
Input B
Non-Inverting
Ground
4
5
Input B
MO
TR
OWNE
BEDIE
MODE

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