Yamaha RX-V495, Руководство по обслуживанию

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DSP-R495/RX-V495RX-V495RDS/HTR-5140/HTR-5140RDS
A B C D E F G H I J K L M N
1
2
3
4
5
6
7
8
9
10
■
SCHEMATIC DIAGRAM (DSP)
★
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.
IC1 : NJM2904M
IC8~13 : uPC4570G2
Dual OP AMP
IC2 : HD74HC02FP
Quad 2 Input NOR
IC7 : AK4320
1 bit D/A Converter
A OUT
A –IN
A +IN
V–
V+
B OUT
B –IN
B +IN
1B 1A 1Y 2Y 2A 2B
GND
Vcc 4A 4B 4Y 3Y 3B 3A
1 2 3 4 5 6 7
14 13 12 11 10 9 8
Conditions (RX-V495RDS)
• INPUT
→
CD
• VOLUME
→
minimum(–
∞
)
• IMPEDANCE
SELECTOR
→
Upper
• PRO LOGIC
→
On
• IC3~6, 14
→
See page 29~35, IC DATA
PIN CONNECTION DIAGRAM OF DIODES, TRANSISTORS AND IC’s.
M5M51288BKJ-20LTEL LC87F5164A
AK4320 1SS355
AK4526
YSS908-F
NJM2904M
uPC4570G2
UPC29M33T-E1
HD74HC02FP 2SC3326(A,B)
DTA144EKA
DTC144EKA
Anode
Cathode
12
13
24
63
Point
5
Pin 13 of IC3
V : 2V/div
H : 50nsec/div
AC range 1 : 1probe
2V SAMPLE 50ns
0V
Point
6
Pin 13 of IC4
V : 2V/div
H : 50nsec/div
AC range 1 : 1probe
2V SAMPLE 50ns
0V
FRONT L
REAR L
DIGITAL
IN
MAIN L
(DSP)
MAIN
L
CENTER
3. 1
2.2
0
0
4.9
0
4.9
4.9
0
0
0 0
0
0
0.2
0.2
0
0
2. 4
2. 4
~
0
0
0
4.7 2.3
2.4 2.4 0
2.4 2.4
0 0
3.1
4.9 0
0
4.7
2.4
2.4
0 0
2.4 1.5
0
3.1
0
3.1
4.9 4.9 4.9
2. 3
0. 9
4. 6
0. 1
0
3.1
0
0
0
0
0
0
0
0
0
0
0
0
2. 4
2. 4
0
0
0 0
4.
7
0
4.9
0
0 0
0 0
0
4.9
0
4.9
0
4. 9
0
0
4.9
0
0
4.9
0
0
0
0
4.9
4.9
4.8
0
4.9
2.4
2.4
2.4
2.4 2.3 4.9
0
2.4
2.4
0
~
~
2.4
2.4
2.4
2.4 2.4 2.4 2.4 2.4 2.4 2.4
4.7 2.3 4.7 4.6 2.3 0.9 0.1 0.1 0.1 0 0 0.1
0.1 0.1 0.1
0
0
3.1
0
0
4 .9
4.8
2.4
2.4
11.7
2.4
2.4
2.4
2.4
2.4
-11.4
-11.4
11.7
2.4
2.4
2.4
0
0
0
0
0
0
0
0
0
11.7
0
0
0
-11.4
0
0
0
11.7
0
0
0
-11.4
0
0
0
0
- 10.8
- 10.8
0
0
-10.8
0.2
0.2
0
0.5
0. 5
4.8
4.8
0
0
0 0.5
0
0.2
0
0
0
- 10.8
- 10.8
0
0
0
0
- 10.8
- 10.8
0
0
0
0
- 10.8
- 10.8
0
0
-11.4
0
11.7
0.6
0.6
0
2.4
2.4
2.4
4.8
2.4
4.8
4.8
2.4
2.4
2.4
0
0
0
2.4
2.4
2.4
0
0
0
4 .9
2 .4
2.4
2.4
0
4 .8
0
0
0
4. 8
0
0 0
4.7
0
4.6
-10.8
0
0
0
0
2. 3
4. 9
2. 4
2. 4
0
0
4. 8
0
4.9 4.9
0 2.3 0 4.8
4 .8
2.4
0 4.9
4.9
0.8
0.8
4.8
4.9
0.2
0
4.9
4.9
4.9
4.9
4.9
4.9 3.3
0
0
0
0
0
0
0 0 0 0
2.2
4.9 4.9
0
4.8
2.4
2.3
4.7
4.7
~
~
~ ~ ~
~ ~ ~ ~
4.8 4.9
0
4.8 4.9
0 0
4.9 4.9
0
2.1 2.5
4.9
~
~
~
~
~ ~ ~ ~ ~ ~ ~
~
~
~
~
~
0.2 0.1 0.1 0.1 0.1 0 0 1.0 1.0
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
5
6
L.P.F
ADC/
DAC
DSP AMP
DAC
MUTE
DRIVE
RAM DSP
CONTROL
DOLBY DIGITAL
PRO-LOGIC DECODER
+
DSP
DIR
MUTING
1
2
3
5
6
4
7
5
6
1
4
8
14
7
11
12
13
8
9
10
3
2
7
8
5
7
4
5
6
8
1
3
2
3
2
4
1
6
LC87F5164A
(LC875164A-5K20)
TO INPUT(3) CB354
P60
M-8
T
O
INPUT(1) CB102
P60
D-1
TO INPUT(1) CB106
P60
H-8