Yamaha DSP-AX620 Service Manual page 58

A B C
DSP-AX620
SCHEMATIC DIAGRAM (OPERATION 2/2)
1
IC581 : TK15420M
VIdeo Amp
OUT 1 8 V
A CC
–IN 2 7 OUT
A B
+ – + –
+IN A 3 6 –IN B
V EE 4 5 +IN B
IC588 : LA7109
2 Ω
75 Video Driver
VIN1+ 1 36 +VCC1
NFB1 2 6dB DR 35 VOUT1
MUTE1 3 34 GND
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.
N.C. N.C.
10 27
3 VIN4+ 11 26 +VCC2
NFB4 12 6dB DR 25 VOUT4
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
4
IC681 : LA7108M-TLM
Ω
75 Video Driver
VIN1+ +VCC
1 16
NFB1 2 6dB DR 15 VOUT1
MUTE1 GND
3 14
VIN2+ 4 13 VOUT2
NFB2 6dB DR MUTE2
5 12
–VCC1 6 11 VOUT3
VIN3+ 7 10 MUTE3
5
NFB3 8 6dB DR 9 –VCC2
IC711 : LA7104M
Double Scart Interface
VIN1+ 1 16 +VCC
NFB1 VOUT1
2 6dB DR 15
6 MUTE1 3 14 GND
VIN2+ VOUT2
4 13
NFB2 5 6dB DR 12 DR CTL
–VCC1 6 11 VOUT3
VIN3+ 7 10 MUTE2
NFB3 8 6dB DR 9 –VCC2
7
IC585 : TC74HCUO4AP
Hex Inverters
1A 1 14 V
DD
1Y 2 13 6A
2A 3 12 6Y
2Y 4 11 5A
3A 5 10 5Y
3Y 6 4A
9
V 7 8 4Y
SS
8
IC586 : TC74HC164AF-EL
8-Bit Shift Register
OUTPUT
V DD QH QG QF QE RESET CLOCK
14 13 12 11 10 9 8
QH QG QF QE RESET
A CK
B QA QB QC QD
1 2 3 4 5 6 7
A B QA QB QC QD V
SS
9
SERIAL OUTPUT
INPUTS
IC582, 583, 682 : TC74HC4051AFEL
Analog Multiplexer/Demultiplexer
INHIBIT VDD
6 16
A 11
LEVEL BINARY TO 1-OF-8
B 10
CONVERTER DECODER WITH INHIBIT
C 9
VSS 8
10
VEE 7
X0 13 SW
X1 14 SW
X2 15 SW
X3
12 SW
X4 1 SW
X5 5 SW
X6 2 SW
X7 4 SW
E-71/J-69
D E F
SAME PAGE
SAME PAGE
J-1
K-4
5.0
5.0
0
–5.0
0 0
–5.0 0
0 0
–5.0
0
0 0
0
0
5.0
0
COMPONENT VIDEO
SELECTOR
0
0 0
0
0
0
5.0
0
0
0
0
0
0 5.0
IC584, 712 : TC74HC4053AP
Triple 2-Channel Multiplexer/Demultiplexer
VDD
16
14 X-COMMON
A 11 OUT C IN 12 OX
IX
OUT C IN 13
B 10 OUT C IN 2 OY
INPUT STATES OUT C IN 1 IY
"ON" CHANNEL (S)
C B A
INHIBIT
C 9
0 0 0 0 0 OUT C IN 5 OZ
0 0 0 1 1
OUT C IN 3 IZ
X 0 0 1 0 2
3
1
0 0 1 3 INH 6 4 Z-COMMON
0 1 0 0 4
0 1 0 1 5 15 Y-COMMON
0 1 1 0 6
0 1 1 1 7 8 7
1 X X X NONE VSS VEE
G H I
4.0
0
4.9
P-E69/J67
M-6
R743
P-E72/J70
K-1
R742
D731
UDZS9.1B
INPUT
SELECTOR
5.0
0 0 0
–0.1
0
–0.1
0 0 0
1.0 0
0
0
4.8 0
–5.0
0 1.0
0
0
0
0 0 1.0
0 1.6 1.6
0
0 0.8
–5.0 0
1.6
0
0.8
0 –5.0
0
0
0
0 0
0
S-VIDEO AMP
0 4.9
0
0.1
5.0 0
0
0 4.9
4.9 –0.1
0 5.0
0 5.0
4.9 –4.9
4.9 –4.9
0 0.1
0 0
5.0 0
0
0 4.9
4.9 –0.1
0 5.0
0 –4.9
S-VIDEO AMP
5.0 5.0
5.0
1.0 1.0
0.4 –0.6 1.0 1.0
1.0
1.7
0
0.7
0
CONTROL INPUTS "ON" CHANNEL
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
J K L
SAME PAGE
SAME PAGE
D-5
J-5
CIRCUIT CHANGES BY MARKET.
INPUT
SELECTOR
0 0
0
0
0
0
0
0
0 5.0
0 5.0
5.0 –5.0 0
0 0
0
–5.0
–5.0
0
–0.1
0
5.0
0
–0.1
0
5.0
VIDEO AMP
0
0
5.0
P-E69/J67
SAME PAGE
SAME PAGE
K-1
F-4
S-SIGNAL DETECTOR
5.0
5.0 2.6
5.0
2.7
2.6
2.7 2.7 2.7
0
0
5.0 4.5
5.0 4.8
5.0
0 0 4.5
5.0
5.0
0 5.0 0 0
5.0
0 4.5 0
0 4.5
0
4.5 0
0
0 4.5
0
–5.0
5.0
5.0
4.3
OUTPUT EXPANSION
0.9
–0.5
0.8
4.3 0
–0.8
–0.6
–0.2
–0.6
–0.5
–0.6
C639
0
r
SUPERIMPOSE
1.7
Point r (Pin 3 of IC587)
V : 1V/div, H : 50 nsec/div
DC, 1 : 1 probe
0V
M N
X : NOT USED
G-1
Conditions
• INPUT: DVD auto
• PROGRAM: PRO LOGIC DSP
* All voltage are measured with a 10MΩ/V DC electric 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.
O