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

A B

SCHEMATIC DIAGRAM (INPUT)

1
2 PHONO MM EQ AMP
8
11.2
0 3
0
0 2 1
3
0 6
0
0 5
7
-11.1
4
4
INPUT SELECTOR
5
6
7
P-E69/J59
C-2
8
C D E
P-E65/J55 P-E69/J59
J-4
21.8
0 3 8
0
0 2
1
0.1
6
0.1
0.1 5
7
4
-22.2
FRONT L
11.6
0
0
5
0 0
8
0
6
7
0
MAIN L
0
2
0
0 0 3 1
-11.5
0 0
4
TAPE MONITOR
3
8
1
2
6
7
5
4
TO VIDEO(1)
P-E67/J67
D-8
P-E72/J62 (J,U,C,A,L,R,T models)
P-E73 (B,G models)
H-5
F G
P-E69/J59
I-3 A-5
0
0
0
CENTER
MAIN L
0 0
0
0
0 2 8 21.8 0 0 0
0
1
0
0 0 3
0
0 5
0
0
0
0
0 6 0 0 0
7
-22.2
4
0
0
0 0
0
0 0
REAR R
0 0
0
0
0 0 5
0 8
0
0 7
6
0 2
0
3
0 0 1
0 0
4
-22.2
0
0
P-E65/J55
B-8
H I J
P-E71/J61
A-5
e
Point (Pin3 of IC21)
V : 2V/div H : 50 nsec/div
DC range 1 : 1 probe
0V
CIRCUIT CHANGES BY MARKET.
-11.4 4.9
4.9
4.9
0
4.8
0
4.9
4.9
0
IC21
0
4.9
4
0
0
4.9
4 3
4.9
4.7 4.7
4.9 4.9
P-E68/J58
H-2
* 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.
INPUT
K
RX-V795a/RDS/HTR-5170/DSP-R795a
r
Point
V : 2V/div (CH1)
CH1 : Pin1 of IC21
CH2 : Pin29 of IC21 V : 2V/div (CH2)
H : 0.5 sec/div DC range 1
: 1 probe
(This waveform is not available by pushing the power switch ON and OFF.)
With the POWER ON, dis- Disconnect the power cord
connect the A/C power cord. from the AC outlet.
Reconnect the A/C power
cord and the above wave-
forms will start.
: NOT USED
: USED
0
0
0.7
0
4.5
0.3
4.9
0.3
0
0.2
1.4
0
0.3
0
1.2
0
1.2
4.9
4.9
0
4.9
0.1
4.9
0
4.9
0
0
4.9
0
0
E-66/J-56