Yamaha RX-V2500 Service Manual page 79

A B C
SCHEMATIC DIAGRAM (INPUT 2/2)
1
Page 80 I8
to CONTROL_CB518_5Pin
2
3
4
5
6
7
8
0
0.1
4.7
0.1
4.7
3.9
4.7
9
10
D E F
SELECTOR
0 4.9
0 0
0 0
0 0
4.9
2.5
0 0
2.6 2.5
2.6 2.5 2.6
0 0
-4.7 0
0 0
0
4.9
0 0
0 0
0 0
0 0
0 0
0
-4.7
0 0
4.9
0
0
0
0
4.9
0 0
1.8K
0 0
0 0
0 0
0 0
0
-4.7
0 0
0 4.9
0
0 0 0
-4.8
0
0 0
0 0
0 0
0 0
-4.7 0
0 0
0
0
0 4.9
3.4
0 0
0
0 0
0
0 0
-4.8
0 0
0
0 0
0
-4.7 0
-4.8
0 0
-4.8
0
0
3.4
0 4.9
0
0 0
0
0 0
-4.8
0 0
0
0 0
0
0 0
-4.7 0
0 0
4.9
0
0 0
0
0 0.1
0
3.4
0 0.1 0
0 0
0 4.7 0
0
-4.7 4.7 3.4
0 -4.8
0 4.7
0
0
3.4
0
3.2
-4.8
0
-4.8
0.5 4.7
-4.8
-0.2
-0.2
0.8
-0.2
0
0
0
-4.8
100
G H I
Page 80 G2
from FUNCTION (3) – C-F_CNCT – CB536_13Pin
4.7
4.9
0.1 0 0.1
4.8
0.1
0.1
0 4.6
0.1
4.2 4.2
0
0 4.9
0 0.1
0 0
0
-0.6
0 0.7
0
0
-4.8 0
0 0
4.8
0
0
0
4.8
0
5.0
-4.8
-4.8
-4.8
4.7
0
0
0
4.7
0
5.0
-4.8
4.7
0
-4.8
4.7
4.4
4.7 4.7
1.0
0.7 4.4
1.5
0.6
-0.6
0.7
0.6
0 0
0.9
0.1
1.4
0.1
0.1
Page 74 C8
to FUNCTION (6) – V-CNCT – CB501_11Pin
J K L
IC701 - 706: MM74HC4051SJX
8-Channel Analog Multiplexer
IN/OUT
VCC Y7 Y6 Y5 Y4 Y3 Y2 Y1 Y0
16 4 2 5 1 12 15 14 13
TG
TG
A 11
TG
TG COMMON
B 10 3
Logic Binary to 1 OUT/IN
TG
Level of 2 Decoders
Conversion with INHBIT
9 TG
C
TG
6 TG
INH
8 7
GND VSS
IC708: TC74HCU04AFEL IC709, 714: TK15420M
Hex Inverters Video Amp
1A 1 14 VCC
OUT A 1 8 VCC
1Y 2 6A
13
2 7
–IN A OUT B
2A 3 12 6Y + – + –
+IN A 3 6 –IN B
2Y 4 11 5A
3A 5 5Y
10 VEE 4 5 +IN B
3Y 6 9 4A
GND 7 8 4Y
O : USED / APPLICABLE
X : NOT USED
★ 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
IC707, 710, 713: MM74HC4053SJX
Triple 2-Channel Analog Multiplexer
IN/OUT
VCC CY CX BY BX AY AX
16 3 5 1 2 13 12
TO
OUT/IN
Logic Binary to 1 AX or AY
A 11 Level of 2 Decoders YG
Conversion with INHBIT
Logic TG
OUT/IN
B 10 Level
Conversion Binary to 1 BX or BY
of 2 Decoders TB
with INHBIT
Logic
4
C Level
Conversion TC
OUT/IN
Binary to 1 CX or CY
Logic
9 of 2 Decoders TG
INH Level
with INHBIT
Conversion
8 7
GND VSS
IC711: LA7109
6CH 75Ω Video Driver
VIN1+ +VCC1
1 36
NFB1 2 35 VOUT1
6dB DR
MUTE1 3 34 GND
VIN2+ VOUT2
4 33
6dB DR
NFB2 5 32 DR CTL2
-VCC1 6 31 VOUT3
VIN3+ 7 6dB DR 30 MUTE4
8
NFB3 29 -VCC4
N.C. 9 28 N.C.
N.C. 10 27 N.C.
VIN4+ 11 11 26 26 +VCC2
NFB4 12 6dB DR 25 VOUT4
MUTE2 13 24 GND
VIN5+ 14 23 VOUT5
6dB DR
NFB5 DR CTL1
15 22
-VCC2 16 21 VOUT6
VIN6+ 17 6dB DR 20 MUTE3
NFB6 18 -VCC3
19
IC712: LA7108M
Video Amp
VIN1+ 1 16 +VCC
NFB1 2 6dB DR 15 VOUT1
MUTE1 3 14 GND
VIN2+ 4 13 VOUT2
6dB DR
NFB2 5 12 MUTE2
-VCC1 6 11 VOUT3
VIN3+ 7 MUTE3
6dB DR 10
NFB3 8 9 -VCC2
IC715: BU2092F-E2
Serial In/Parallel Out Driver
Vss 1 18 VDD
DATA OE
2 17
CLOCK 3 Control 16 Q11
Circuit
LCK Q10
4 15
Q0 5 14 Q9
Q1 Q8
6 13
Q2 7 12 Q7
Q3 8 11 Q6
Q4 9 10 Q5
IC716: NJM2581M
Video Amp
75Ω
6dB
VIN1 1 AMP Driver 14 V+1
BIAS
NEE1 2 13 VOUT1
6dB 75Ω
VIN2 3 12 V+2
AMP Driver
BIAS
VEE2 4 11 VOUT2
75Ω
VIN3 5 6dB 10 V+3
AMP Driver
BIAS
VEE3 6 9 VOUT3
7 REF
PowerSave 8 GND
79