Schematic Diagram (Dsp) - Yamaha RX-V795a Service Manual

A B
RX-V795a/RDS/HTR-5170/DSP-R795a

SCHEMATIC DIAGRAM (DSP)

1
P-E69/J59
F-2
2
4.9
DIGITAL IN
3 8
0
0
0
1
4
2
0
4.9
14
11 0 0
5
4.9
7
8 13
12 6
7
0 0.1
0 0 10 0
9 2.2
3 0
0
0 0
DIR
0 0
0 0
0
IC3
4.9
4.9 5 0
4.9
4.9
0 2.4
4
4.9 2.3
5 6
DIGITAL IN
5
0
4.9
0
0
4.9
IC14
4.9
0
6
0
4.9
0
6
7
P-E66/J56
G-8
8
E-65/J-55
C D E
3.1
2.4
2.4
2.6
0
2.4
0.9
4.7
0.1
IC4
0
3.1
0
DSP
0
0
+
0
0
DIGITAL PRO-LOGIC
0
0
0 DTS DECODER
0
2.4 2
2.4
1
3
RAM
4.9
4.9
0
4.9
4.9
4.9
4.9
4.9
4.9 3.3
0
t Point y (Pin13 of IC14)
Point (Pin13 of IC3)
V : 2V/div H : 50 nsec/div V : 2V/div
DC range
DC range 1 : 1 probe
F G
4.8
4.8
0
2.4
2.4
2.4 2.4
0 4.8 4.8
0 0 2.4 2.4
0 2.4
2.4 DAC
0 2.4
2.4
2.4 2.4
2.4 2.4
3.1
0 2.4 2.4 2.4
0
2.4
0 0
2.4
2.4 2.4
2.5 2.4
0 2.4 0 0
0 2.4
MAIN L
4.7
4.8 4.7
4.7
0 0
-10.9
-10.9
0
0 0 0
0
0
-10.9
0
0
4.9 0
0
0 4.9
0
2.3 4.9
4.9 2.4
2.4 2.4
2.4
2.4 0
0 4.9
0 0
0
-10.9
4.9 0
0
0
0.5 0
-10.9
-10.9
0 0.2 0.2 0.2
0
4.9 0.5
4.9
0
0
0 0.5
0
-10.9
0
0
-10.9
0
0
-10.9
0
0
-10.9
0
H : 50 nsec/div
1 : 1 probe
H I
11.5 MAIN L
2.4
6
2.4 2.4
8
2.4 2.4
6 7
2.4 4 5
7
-11.5
5
11.5
3 2.4
2.4
8 3
2.4
2.4
1 2.4
-11.5 2
4 2 1
2.4
11.5
0
0
0
0.6 0
0
0
0.6 0
0
0
0
-11.5
0
11.5
0
0
FRONT L
0
0
-11.5
0
CENTER
0
11.5
0
0
REAR L
0
0
-11.5
0
Other ICs
→ See page E-27/J-23
IC3 : YM3436DK
→ See page E-28/J-24
IC4 : YSS918-F
→ See page E-31/J-27
IC14 : LC87F5164
J K L
IC1 : NJM2904M IC2 : HD74HC02FPEL
µ
IC8~11, 13 : PC4570G2 Quad 2 Input NOR
Dual OP Amp
IC5 : M5M51288BKJ-20L
RAM
A0
A1
Vcc(5V)
A2
18 512 MEMORY ARRAY
A3 GND(0V)
131072X8bit
A4
A5 512X2048
A6
A7
A8
2048
COLUMN I/O CIRCUIT
DQ1
DQ2
256
DQ3
COLUMN DQ4
ADDRESS DECODER DQ5
DQ6
16
DQ7
COLUMN DQ8
INPUT BUFFER
A9 A11 A13 A15
A10 A12 A14 A16
S1
CHIP SELECT
S2 CIRCUIT
WRITE ENABLE
W
CONTROL INPUT
OUTPUT ENABLE
OE
CONTROL INPUT
IC6 : AK4526
A/D
IC7 : AK4320
1 bit D/A Converter
* All voltage are measured with a 10M Ω /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.
DSP