Yamaha RX-V496 Service Manual page 50

A B
DSP-R496/RX-V496/RX-V496RDS/HTR-5240/HTR-5240RDS
I SCHEMATIC DIAGRAM [INPUT (2/2)]
1
2
EXT.DECODER
INPUT
3
OPTICAL
SIGNAL
DETECTOR
3.1
4.7
2.5
COAXIAL
3.1
0
4
0 4.7 0
OPTICAL
DIGITAL IN
OPTICAL
5
6
IC351: TC74HCU04AP IC352 : HD74HC153P
Hex Inverters Dual 4 to 1 Data Selectors
1A 1 14 V
DD
1Y 2 13 6A
2A 3 12 6Y
2Y 4 11 5A
3A 5 10 5Y
3Y 6 9 4A
7
Vss 7 8 4Y
IC101 : LC78211
Analog Function Switch
8
E-61/J-57
C D E
DIGITAL
INPUT
SELECTOR
0 0
0.3
0
0
0 4.7
0
4.7
#1
INPUTS OUTPUTS
SELECT STROBE
Y
B A G
X X H L
L L L C0
L H L C1
H L L C2
H H L C3
H: High Level
L: Low Level
X: Don't care
IC102 : LC78213 IC103 : LC78212
Analog Function Switch Analog Function Switch
L1 1
L2 2
L3 3
LCOM1 4
L4 5
L5
6
L6 7
LCOM2 8
L7 9
L8 10
LCOM3 11
V 19 LEVEL SHIFTER
DD
Vss 16
LATCH
V 12
EE
RES 18 SHIFT RESISTER
S 17
F G
VOLUME AMP
MAIN L
11.8
0
0
0
0
0
0 -11.9
CENTER
11.8
0
0
0
0
0
0 -11.9
LFE
#4
11.8
0
0
0
REAR L
0
0
0 -11.9
MOTOR DRIVE
VOLUME
IC401~403 : uPC4570C IC404 : LB1641
Dual OP-Amp Motor Driver
A OUT V+
A –IN
B OUT
A +IN B –IN
V– B +IN
30 R1
IC105,106 : uPC4570HA
29 R2 IC104 : NJM2068LD
Dual OP-Amp
IC108,109 : M5220L
28 R3
27 RCOM1 Dual OP-Amp
26 R4
+ +
R5
25
– –
24 R6
23 RCOM2 1 2 3 4 5 6 7 8
22 R7
21 R8
20 RCOM3
14
D1
15 CL
13 CE
H I J
POWER SUPPLY
31.3
-0.1 -0.1
-31.7
#11
19.4
-0.1
-0.1
-19.9
4.9
10.5 0
5.0
PIN CONNECTION DIAGRAM OF DIODES, TRANSISTORS AND IC's.
1SS133 HZS5C2TD 2SC2878(A,B) 2SA893A(D,E)
1SS176 HZS11B2TD
DTA144ES
HSS104
Anode
B
C
E
Cathode E
C
B
LB1641 uPC4570C TC74HCU04AP BU2090
HD74HC153P
10
Conditions (RX-V496RDS)
#
→ CD
• INPUT
→ minimum(–∞) #
• VOLUME
• IMPEDANCE
→ Left
SELECTOR
• PRO LOGIC → On
#
K L
AC49.1V
AC
31.3V
AC9.7V
TO
OPE(1)
W502
page
E-62/J-58
H-7
M5220L uPC4570HA
NJM2068LD
8
9
LC78211
LC78212
LC78213
All voltages are measured with a 10M Ω /V DC electric volt meter.
Components having special characteristics are marked and
must be replaced with parts having specifications equal to those
originally installed.
Schematic diagram is subject to change without notice.