Yamaha RX-V495, Руководство по обслуживанию

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DSP-R495/RX-V495/RX-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 (OPERATION)
★
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.
IC801, 802 : NJM2068LD
Dual OP-Amp
1
OUT1
2
–IN1
3
+IN1
4
–Vcc
5
+IN2
6
–IN2
7
OUT2
8
+Vcc
+
–
+
–
• IC800
→
See page 26~28, IC DATA
Conditions (RX-V495RDS)
• INPUT
→
CD
• VOLUME
→
minimum(–
∞
)
• IMPEDANCE
SELECTOR
→
Upper
• PRO LOGIC
→
On
62
PIN CONNECTION DIAGRAM OF DIODES, TRANSISTORS AND IC’s.
2SC4488(S,T) LC87F65C8A
2SA933A(Q,R)
2SC1740S(R,S)
DTA144ES
DTC144ES 1SS133
1SS176
HSS104
HZS5B2TD
HZS6C2TD
HZS7B2TD
NJM2068LD
Anode
Cathode
S1NB20
HZS7C2TD
HZS12B2TD
2SD2396(J,K)
E
C
B
E
C
B
8
2SC2878(A,B)
MAIN L
AC6.8
AC47.6
AC32.3
AC9.6
4
-30.2
0
29.9
19.7
-20.2
10.2
-29.8 -29.8 -22.4 -22.4 -29.8 -29.8 -29.8 -29.8 -24.5 -27.1 -24.5 -24.5 -27.1 -27.4 -27.4 -27.4 -27.4 -27.4 -27.4 -27.4 -27.4 -27.4 -27.6 -27.6 -27.6 -27.6 -27.6 -27.7 -27.6
4.7
-9.2
-20.0
-27.4
-27.4
-27.4
-27.4
-27.4
-27.4
-27.4
-27.4
-27.4
-27.6
-27.6
-27.6
-27.6
-27.6
-27.7
4.0
4.0
0
4.7
-11.5
4.2
4.7
2.4
4.7
4.6
0
0
0
4.7
5.5
6.0
13.1
6.6
12.4
0
13.1
7.3
0
5.5
4.7
-30.0
-23.0
4.7 4.7
0
13.1
4.7
0
0
4.7
4.7
0
4.7
0
4.7
0
0
0
0
4.7
4.7
4.7
4.7
4.7
0
0.6 0.6 4.7 4.7 4.7
4.
7
4.7 4.7
0
0 0
4.9
0
2.2 2.5 4.7 4.7 4.7 4.7 4.7
0
0.3
0
1.9 4.9 4.8
4.7
--27.6
-22.4 -22.4 -27.6 -24.5 -27.6 -24.8 -20.0 -9.2
~ ~ ~
-29.8 -29.8 -29.8 -29.8 -29.8 -29.8
4.7 2.4 4.6 4.7
4.7
4.7
3.2
0
-29.6 -27.1 -29.6 -24.5 -27.1 -29.6 -24.5 -29.6 -24.8 -30.0
~ ~
~
~
~
~ ~
~ ~
3
0
0
0
1.9
0
0.3
0
0.2
0.3
0
0
0
13.1
13.1
0.7
AC12.6
0
0
-11.6
0
0
0
11.8
0
0
0
0 0
0 0
0.7
0.7
11.8
0
0
0
-11.6
0
4.0 4.0
0
SYSTEM & DSP
CONTROL
TONE CONTROL
SUB POWER SUPPLY
POWER SUPPLY
#17
AC OUTLETS
VOLTAGE
SELECTOR
AUDIO
VIDEO
TAPE/MD MON
/EXT.DECODER
T
O
INPUT(1) CB104 P60
G-8
OPE(1)
#13
LC87F65C8A
(LC876564A-5K19)
T
O
MAIN(1) CB505
P61
I-4
T
O
INPUT(2) CB302
P58
E-3
T
O
INPUT(1) CB108
P60
I-1
T
O
MAIN(1) CB506
P61
I-5
T
O
MAIN(7) CB722
P61
M-9
:NOT USED
:USED
OPE(2),(3),(4)
RJ-1086-01-0300
Point
3
(Pin 16 of IC800)
V : 2V/div
H : 50nsec/div
AC range 1 : 1 probe
2V SAMPLE 50ns
0V
Point
4
CH1 : Pin 11 of IC800
CH2 : Emitter of Q806
V : 2V/div
H : 0.5sec/div
DC range 1 : 1probe
2V 2V SAMPLE 0.5s
0V
CH1
(CH1)
(CH2)
CH2
0V
Disconnect the
power cord from
the AC outlet.
This waveform is not available by pushing the
power switch ON and OFF.
With the POWER
switch turned ON,
connect the
power cord to the
AC outlet.