Yamaha RX-V750 Service Manual page 81

A B C
SCHEMATIC DIAGRAM (FUNCTION 2/2)
RX-V750/DSP-AX750/DSP-AX750SE/RX-V650
1
IC601, 602, 901 : MM74HC4051SJX IC902 : LA7108M
Analog Multiplexers/Demultiplexers Video Amp
INHIBIT VDD
VIN1+
6 16 1
A 11
LEVEL BINARY TO 1-OF-8 NFB1 2 6dB DR
B 10
CONVERTER DECODER WITH INHIBIT
C 9
VSS 8
MUTE1
3
VEE 7
X0 13 SW
X1 14 SW VIN2+ 4
X2 15 SW
X3 12 SW 3 X NFB2 6dB DR
5
X4 SW
1
X5 5 SW —VCC1
6
2
X6 2 SW
X7 4 SW
VIN3+ 7
NFB3 8 6dB DR
INPUT STATES
"ON" CHANNEL (S)
INHIBIT C B A
0 0 0 0 0
0 0 0 1 1
0 0 1 0 2
0 0 1 1 3
0 1 0 0 4
0 1 0 1 5
0 1 1 0 6
0 1 1 1 7
1 X X X NONE
IC903 : BU2092
IC603, 604 : MM74HC4053SJX Serial In/Parallel Out Driver
Analog Multiplexers/Demultiplexers
VDD
16
3
VSS 1
14 X-COMMON
DATA 2
A 11 OUT C IN 12 OX
OUT C IN 13 IX
CLOCK 3
B 10 OUT C IN OY
2
LCK 4
OUT C IN 1 IY
C 9 Q0 5
OUT C IN 5 OZ
OUT C IN 3 IZ
Q1 6
INH 6
4 Z-COMMON
Q2 7
15 Y-COMMON
Q3 8
8 7
VSS VEE
Q4 9
CONTROL INPUTS "ON" CHANNEL
4 INHIBIT C B A 0X (Pin 12), 0Y (Pin 2), 0Z (Pin 5)
(Pin 6) (Pin 9) (Pin 10) (Pin 11) 1X (Pin 13), 1Y (Pin 1), 1Z (Pin 3)
L L L L 0X, 0Y, 0Z
L L L H 1X, 0Y, 0Z
L L H L 0X, 1Y, 0Z
L L H H 1X, 1Y, 0Z
L H L L 0X, 0Y, 1Z
L H L H 1X, 0Y, 1Z
L H H L 0X, 1Y, 1Z
L H H H 1X, 1Y, 1Z
H * * * NOTE
* Don't Care
IC607, 608 : TK15420MTL IC609 : TC74HCU04AFEL
Video Amp Hex Inverters
1A 1 14 V DD
OUT 1 1 8 +V CC
1Y 2 13 6A
–IN 2 7 OUT
1 2
5 + – + –
3 2A 3 12 6Y
+IN 1 6 –IN 2
2Y 4 11 5A
–V CC 4 5 +IN 2
3A 5 10 5Y
3Y 6 9 4A
V 7 8 4Y
SS
6
7
C-INPUT SELECTOR
0 4.7
0 0
0 0
0 0
0 0
0 4.9
–4.7 0
0 0
0 4.7
0 0
8
0 0
0 0
0 0
0 4.9
–4.7 0
0 0
Y-INPUT SELECTOR
9
–0.5
0.8
0
10
D E F
+VCC
16
15 VOUT1
GND
14
VIDEO SELECTOR
13 VOUT2
12 MUTE2
4.9
0
VOUT3
11 0 0
0 0
0
0
10 MUTE3 0 0
0 4.9
–4.9 0
9 —VCC2
0 0
0
0
0
3.6
0
0
0
18 VDD
3.5
17 OE
CONTROL
16 Q11
CIRCUIT
0 4.9
15 Q10 0
0 0
4.9
14 Q9
–4.9
13 Q8
–4.9
12 Q7
11 Q6
Q5
10
4.7
S-SIGNAL DETECTOR
0
4.7
0
0 0
4.7
0 0
0 0.9
0 0.9 2.5 2.5 2.5
0 1.9
0 4.4
–4.7 4.4
0 4.7
0 0 0
0.9
4.7
0.9 1.9
–4.7
VIDEO DRIVER
0 4.7
0 –0.1
3.5
0
0
0 4.7
–4.7
0
0 4.7
0 –4.7
–4.7 –4.7
–0.9
–4.7 –4.7
0 4.7
0 –0.1
3.5
0
0 0.1
0 4.7
–4.7
0
0 4.7
0 –4.7
4
Y/C MIX
–0.2
–0.2
1.6
0
0.9
1.8
0.9
ON SCREEN
G H
AX750 V750, V650
TO CONVERSION (1) CB704
3 CH1
REGULATOR
Page 85 H-10
TO MAIN (2) CB122
5.0
10.0 5.7 5.7
5.2
5.7
2.5 2.5 2.6
4.7
0 4.4 4.8
5.7 5.0
0 4.4 4.8 4.3
0.1
Page 85 F-1
TO MAIN (1) CB3
RX-V750 (U, C, A)
0.6
RX-V650 (U, C, A)
0 0
only
RX-V750/DSP-AX750/DSP-AX750SE Page 87
RX-V650 Page 88 C-7
TO CONVERSION (1) CB705
I J K
AX750SE V750 V650 V750, V650 AX750 V750, V650
B, G, E
WD19590
47/50 100/35 100/35
59 C535
VG29120 UR85810 UR85810 UR85810
Page 87 C-3 Page 80 C-1
TO FUNCTION (1) CB303
4.9
–11.6
RX-V750 (G) 4.9
RX-V650 (B, G, E)
–11.6
only
4.9
–11.6
4.9
–11.6
4.9
4.9
5.0
4.9
4.9
4.8
4.9
4.8
CPU
4.8
4.8
0
5.0 0
1.7
0.4
M30622MHP-161FP
4.9 3
CH2
0.9
4.9
4.9
2
0
4.9
4.9
5.0
4.8
R511 V750: NONE
V650: 33K
Page 83 C-7 Page 79
TO OPERATION (1) CB801 TO DSP CB1
C-9
* All voltages are measured with a 10M Ω /V DC electronic volt meter.
* Components having special characteristics are marked Z and
must be replaced with parts having specifications equal to those
originally installed.
* Schematic diagram is subject to change without notice.
L M N
RX-V750/DSP-AX750/DSP-AX750SE
RX-V650/HTR-5760
AX750SE V750 V650 V750, V650
B, G, E
IC605 : LA7109-TLM
75Ω Video Driver
VIN1+ 1 36 +VCC1
NFB1 6dB DR VOUT1
2 35
MUTE1 3 34 GND
WD19590
VIN2+ 4 33 VOUT2
NFB2 DR CTL2
5 6dB DR 32
–VCC1 6 31 VOUT3
VIN3+ 7 30 MUTE4
NFB3 8 6dB DR 29 –VCC4
N.C. 9 28 N.C.
100/35 100/35 100/35 100/35 100/35 100/35
UR85810 UR85810 UR85810 UR85810 UR85810 N.C. N.C.
10 27
VIN4+ 11 26 +VCC2
X: NOT USED
O: USED / APPLICABLE
NFB4 6dB DR VOUT4
12 25
MUTE2 13 24 GND
VIN5+ 14 23 VOUT5
NFB5 DR CTL1
15 6dB DR 22
–VCC2 16 21 VOUT6
VIN6+ 17 20 MUTE3
NFB6 18 6dB DR 19 –VCC3
IC503 : LC72722PM
RDS Decoder
Page 80 E-1
TO FUNCTION (1) CB304
1 5 6
VDDA 3 CLOCK 14 VDDD
+ PLL
RECOVERY
REFERENCE (57kHz)
(1187.5Hz)
SW VOLTAGE
VSSA
4 15 VSSD
VREF
57kHz
ANTIALIASING SMOOTHING DATA
MPX IN 2 bpf 19 RDS-ID
FILTER FILTER DECODER
(SCF)
DO 20
CL 21 18 SYNC
RAM ERROR CORRECTION SYNC/EC
DI 22 CCB (24 BLOCK DATA) (SOFT DECISION) CONTROLLER
24 SYR
CE 23
CLK(4.332MHz)
T1
7 MEMORY
CONTROL
T2 8 SYNC SYNC
5.0 TEST
T3 9 DETECT-1 DETECT-2
OSC/DIVIDER
T4 10
11 16 17 13 12
5.0
5.0
Point w (Pin 13 of IC502)
V : 2V/div, H : 40nsec/div
5.0 DC, 1 : 1 probe
5.9
0V
Point e
CH 1 : Cathode of D501
CH 2 : Pin 12 of IC502
0
V : 5V/div (CH 1)
0
0 V : 5V/div (CH 2)
0
DC, 1 : 1 probe, H : 4.0sec/div
5.0
5.0
0
5.0
5.0
0 CH 1
5.9
4.9
5.0
0
0.7
0
0
0
CH 2
0.1
0
↑ ↑
AC POWER ON AC POWER OFF
(Connect the power cable) (Disconnect the power cable)
Point r (Pin 3 of IC606)
V : 2V/div, H : 40nsec/div
DC, 1 : 1 probe
0V
G-1
Z
81