Yamaha RX-V2500 Service Manual page 73

A B C
SCHEMATIC DIAGRAM (FUNCTION 1/2)
1
Page 74 E2
to FUNCTION (3) – C-F_CNCT – CB533
2
3
4
5
6
7
ZONE2/ZONE3 : U, C, A, B, G models only
8
IC358, 532-534: µPC4570G2
IC505: NJU7311AM
9
Dual OP-Amp Analog Function Switch
L1 2 27 R1
OUT 1 1 8 +V CC
L2 3 26 R2
–IN 2 7 OUT L-COM1 4 25 R-COM1
1 2
+ – + –
L3 5 24 R3
+IN 1 3 6 –IN 2
L4 6 23 R4
–V CC 4 5 +IN 2 L-COM2 7 22 R-COM2
L5 8 21 R5
L6 9 20 R6
L-COM3 10 19 R-COM3
L7 11 18 R7
L-COM4 12 17 R-COM4
ST DATA
13 16
CONTROL
10
V DD 28 15 CK
V EE 1 14 V SS
D E F
FUNC (2)
IC515, 516: YAC526-EZE2 IC528: YAC520-EE2
Stereo Digital Volume Controller
VREF
IN1 24 100Ω
0 ~ -95dB
21 OUT1
+
–
Vol B: 10kΩ 0 ~ +31.5dB
OP Amp
LIN2 12
REF1B 22
LIN1 11
REF1A 23
Vol A: 15kΩ
Vref
Generator
256 &
Zero 10 TE1
Reset
AVDD Crossing 11 TE2
pulse
Detector 12 TE3
Generator
DGND 5
1 ZCEN1 DVSS 4 Reset
Control L
REF 6 2 ZCEN2
Register
DVDD 3
AVSS 9 SDATAO (Open Drain)
Zero
S/P 4 SDATAI
DVSS Crossing
7 Register SCLK
Detector 16 8 Zero Cross Control
3 CSN AVSS 13 Detection Register
R S/P
AVDD 6 16
Register
Vol A: 15kΩ
REF2A 14
REF2B 15
256
Vol B: 10kΩ 0 ~ +31.5dB
100Ω
16 OUT2
0 ~ -95dB RIN1 15
IN2 13
OP Amp RIN2
14
VREF
G H I
-11.9 11.7
0
0
0
0
S63
0
0 0
2.6 0 S54
2.6
2.6 11.7
2.6
0 0
0
2.4 2.6
0
2.6 5.1
0 0
5.1 0
0 5.1
0
5.0 0
0
0.1 0
0 -11.9
0 0 S54
0
0
0 0
11.7
0 0 0
0
0
0
0
0 0 0
-11.9
0 0
0
11.7
0
0 S54
0
0
0
S54
0 -11.9
-6.1 0
6.2 0
11.7
0
0
0 0
0
0
S54
0 0 0
0
0
0
0
0 0
0
0
6.2
0
-6.1 0 0
0
0 0 S54
0 -11.9
11.7
0
0
0
0
0
0 -11.9
9 LOUT
8 VREF
17 ICN
16 TE
18 ZCEN
SDATAO
2
SDATAI
20
19 CSN
1 SCLK
7 ROUT
J K L
Page 74 A2
to FUNCTION (3) – C-F_CNCT – CB523
0.1 0.1
-11.9
-11.9
0 0
0 0
-11.9
-11.9
0.1 FRONT L
-0.1
0.1 0.1 0.1
-11.9 -11.9 -11.9
0 0
0
0 0 0
-11.9 -11.9
-11.9
0.1 0.1 0.1
CENTER
0.1 -0.1 -0.1
-11.9 -11.9
-11.9
0 0 0
0 0 0
-11.9 -11.9
-11.9
0.1 -0.1 -0.1
S59 S60
0.1 0.1
-11.9
-11.9
0 0
0 0
-11.9
SURROUND BACK L
-11.9
0.1
0.1
S56 S57
0
0 0
0 0
0
FUNC (1)
★ All voltages are measured with a 10MΩ/V DC electronic volt meter.
★ Components having special characteristics are marked s and must be replaced
with parts having specifications equal to those originally installed.
★ Schematic diagram is subject to change without notice.
M N
RX-V2500/DSP-AX2500
IC529: YAC523-EVR2
Digital Volume
IN1 3
0~95dB
100
+
OPA 34 OUT1
–
REF1B 25
0~+31.5dB
REF1A 24
VolA: 30kohm
IN2 4
0~95dB
100
+
OPA 33 OUT2
–
REF2B 23
0~+31.5dB
REF2A 22
VolA: 30kohm
IN3 5
0~95dB
100
+
OPA 32 OUT3
–
REF3B 21
0~+31.5dB
REF3A 20
VolA: 30kohm
IN4 6
0~95dB
100
+
OPA 31 OUT4
–
REF4B 19
0~+31.5dB
REF4A 18
VolA: 30kohm
Zero Crossing
CH1, 2, 3, 4 Control
Zero Crossing Detector
Zero Crossing Detector
Zero Crossing TE1
Detector 45
Detector
44 TE2
39 ZCEN2
AVDD 2
38 ZCEN1
DGND 46 Control
Register SDATAO (OD)
REF 47 43
41 SDATAI
AVSS 1 S/P
Register 42 SCLK
56
Zero Crossing 40 CSN
Detector Zero Crossing
Zero Crossing Detector
CH5, 6, 7 Control
Detector
VolA: 30kohm
REF5A 17
0~+31.5dB
REF5B 16
100
+
0~95dB
OPA 20 OUT5
–
IN5 7
VolA: 30kohm
REF6A 15
0~+31.5dB
REF6B 14
+ 100
0~95dB OPA 19 OUT6
–
IN6 8
VolA: 30kohm
REF7A 13
0~+31.5dB
REF7B 12
+ 100
0~95dB OPA 18 OUT7
–
IN7 9
IC530: NJM2068MD-TE2
Dual OP-Amp
OUT 1 1 8 +V CC
–IN 2 7 OUT
1 2
+ – + –
+IN 3 6 –IN
1 2
–V CC 4 5 +IN 2
IC542: ADM202JRN-REEL7
RS-232 Driver/Receiver
+5V → +10V
C1+ 1 16 Vcc
Voltage Boost
C1– 3 2 V+
Circuit
C2+ 4
+10V → –10V
6 V–
Voltage Inverter
C2– 5
T1in 11 T1 14 T1out
T2in 10 T2 7 T2out
R1in
12 R1 13 R1out
R2in 9 R2 8 R2out
GND
15
73