Yamaha RX-V1500 Service Manual page 79

A B C
SCHEMATIC DIAGRAM (FUNCTION 1/2)
1
Page 84 C2
to VIDEO (2)
2
3
4
EPROM
3.0 1.8
1.5
-11.8 11.4 2.9 0
0.1
11.4 3.0 3.0
0.1 11.4
2.6 2.9
0.1 0
2.4 2.7
4.9 2.3
4.7 1.6
1.8
5
2.5
2.2
4.9
4.9
-11.8 11.4
4.9
0.1 2.7
11.4
0.1 11.4 3.1
0.1
0.1 0 2.1
0.1 2.5
4.9 2.6
2.4
2.7
2.8 1.9
2.6 2.8
2.1 3.0
-11.8 11.4
2.8 0
0.1
11.4
2.8 1.6
0.1 11.4
3.9 3.9
0.1 0
6
-11.8 11.4
0.1
11.4
0.1 0
0.1 0
11.4
-11.8
7
0.1
11.4
0.1 0
0.1 0
8
FUNCTION(1)
9
IC502, 509: LC78212 IC503: LC78211
Analog Function Switch Analog Function Switch
1 30
L1 R1 L1 1
2 29
L2 R2 L2 2
L3 3 28 R3 3
L3
LCOM1 4 27 RCOM1
L4 4
L4 5 26 R4 LCOM1 5
L5 6
L5 6 25 R5
L6 7
7 24
L6 R6
8
LCOM2
10 8 23
LCOM2 RCOM2
L7 9
L7 9 22 R7
10
L8
L8 10 21 R8
LCOM3 11
11 20
LCOM3 RCOM3
V 19 LEVEL SHIFTER
DD
V DD 19 LEVEL SHIFTER
16
V SS
V 16 ZZ
SS LATCH
ZZ 14 D1 V EE 12
LATCH
V EE 12
18 ZZ
15 CL RES
RES 18 ZZ SHIFT REGISTER
SHIFT REGISTER
S 17 ZZ
17 13
S ZZ CE
D E F
Page 84 C3 Page 77 G1
to VIDEO (2) to DSP
5.6
0
EXTEND
PORT
0 0
0 0
4.9
1.9
2.9
2.3
1.8
2.2
0
4.9
4.9
5.1
CPU
5.1
3.1
2.5
2.4
2.8
5.1
5.1
5.1
5.1
0.1
0.1
0.1
0
4.9
4.9
5.1
0
0.3
5.2
5.2
0.8
0.5
0.4
0
0.2 1.2
0.2 5.2
4.9
0 0
1.2
0.4
0
0
8.7 5.8
5.8 5.8
A
0.8
5.2
0.8
0
3
IC504, IC510: LC78213 IC505: M62320FP
Analog Function Switch I/O Expander
16 15
30 R1 L1 1 30 R1
29 L2 2 29
R2 R2
SCL 2
28 3 28
R3 LCOM1 RCOM1 I 2 C Bus Interface
SDA 3
4 27
27 R4 L3 R3
Output Data
26 RCOM1 5 26
L4 R4
25
R5 8
LCOM2 6 25 RCOM2
24 R6 Output
L5 7 24 R5
23 Data Latch
RCOM2
22 R7 L6 8 23 R6
8
21 9 22 Reset
R8 LCOM3 RCOM3
20 RCOM3 VDD 13 Power On
L7 10 21 R7
Reset
GND 8
LCOM4 11 20 RCOM4
14 D1 19
V DD LEVEL SHIFTER
15 V SS 16
CL 14 D1 12 11
LATCH ZZ
V 12
EE
13 CE
18 ZZ 15 CL
RES
SHIFT REGISTER
S 17 13 CE
ZZ
G H
Page 82 E7
to MAIN (1)
5.2
0.1
0
5.2
1.6
10.9
0
0
4.9
3.0
4.9
0.1
4.9
5.7
0
4.9
4.9
4.9
0
4.9
5.0
0.1
0
4.9
4.9
4.9
4.8
4.9
0
2
4.8
4.9
4.3
5.5
5.8 4.9
5.8 5.2
B
4.9
0.1
0.1
0
0
IC522: AN78N05
IC508: SN74AHCT126PW
Voltage Regulator
Quadruple Bus Buffer Gates with 3-state Outputs
14
1A 1 14 VCC Output Pass Transistor
1Y 2 13 6A
Excessive Electric
Current Protection
2A 3 12 6Y
Shift Register 1 SO
Input/Output
2Y 4 11 5A
8 8
Standard
3A 5 10 5Y
Voltage
I/O Setting I/O Setting
Register Register
3Y 6 9 4A
Starter
8 8 GND 7 8 4Y
Circuit
Input Data
I/O Port
1 2
10 9 7 6 5 4
I J K
Page 81 H1 Page 81 E8
to OPERATION (1) to OPERATION (2)
11.5
10.9 10.9
Point 2 Pin 20 of IC520
10.9 -11.9
10.9
0
10.9 10.9
10.9 -11.8
0
0
10.9 10.9
10.9 -11.8
Point 3 emitter of Q511
0
and collector of Q512
0
10.9 10.9
A Q511 E
10.9 -11.8
0
B Q512 C
0
0.1 6.7
POWER ON POWER OFF
(Connect the power cord) (Disconnect the power cord)
0.1 5.2
0.8
0
7.0 7.6
0.1 7.8
0.8
0
IC512: MX29F400BTC-70
4Mbit CMOS Flash Memory
CE
Control Program/Erase
Write State
OE Input Logic High Voltage
Machine (WSM)
WE
Address State
Flash
Latch Register
A0~A17
and Array Array
Buffer Source
HV
Command
Y-Pass
Data Decoder
Gate
Command
Sense PGM Data Latch
Amplifier Data HV
Program
Data Latch
Rsc
Q0~Q15/A-1 I/O Buffer
+
Amp.
–
Heat
Protection
★ All voltages are measured with a 10MΩ/V DC electronic volt meter.
★ Components having special characteristics are marked s and must be replaced
3
with parts having specifications equal to those originally installed.
★ Schematic diagram is subject to change without notice.
L M N
RX-V1500/DSP-AX1500
x: NOT USED
O: USED / APPLICABLE
79