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Extracted text from yamaha rxv 795a (Ocr-read)
Page 1
RX-V795a/RDS/HTR-5170/DSP-R795a
ABCDE FGH I J K
1
2
3
4
5
6
7
8
SCHEMATIC DIAGRAM (INPUT)
E-66/J-56
* All voltage are measured with a 10M
-„¦/DC electric volt meter.
* Components having special characteristics are marked
Zand
must be replaced with parts having specifications equal to those
originally installed.
* Schematic diagram is subject to change without notice.
INPUT
(This waveform is not available by pushing the power switch ON and OFF.)
Disconnect the power cord
from the AC outlet. With the POWER ON, dis-
connect the A/C power cord.
Reconnect the A/C power
cord and the above wave-
forms will start.
0V Pointe (Pin3 of IC21)
V : 2V/div H : 50 nsec/div
DC range 1 : 1 probe
Pointr CH1 : Pin1 of IC21 CH2 : Pin29 of IC21
H : 0.5 sec/div DC range 1
: 1 probeV : 2V/div (CH1)
V : 2V/div (CH2)
FRONT L
REAR R
MAIN L
MAIN LCENTER
43
4
00
0 04.9
11.3-11.5
11.6
11.6
0
0 0
0
0
-11.5
11.6
11.6
0
0 0
0
0
-11.5
4.7 2.04.8 4.9 4.90 0 4.90
0 4.9
4.90 4.80 4.9
00 1.2 0 0.3
0 0.2 0.7 -11.4 0
011.2
0
0
0
0
0
0
00
0
00
0
0 0
0
0
00
0
0
0
0
0
0
0
0
00
0 11.6
0
0
00
00
0 0 0 0
000 0 0
0 0 0 00
00 00
00
0
0
0 000 0
0
0 0 0
-22.20.1 0.1
0.10
0
0
0 0.3
0.3
021.8
0
00 0 0
0
000 21.8
0 00
0
-22.2
0
0
0
0
0
-22.2 0
-11.5
0 -11.10
4.9
0
0
4.9
0
0.3
0 4.9
0
0
4.9 04.9 0.1
4.9
4.9
4.9
01.2
0.3
1.4
0 4.9
4.5
2.2
4.7
4.9
4.9
4.7
4.9
4.9
0
0
0
0
4.9
4.9
0
4.9
4.9
04.9 4.9 4.9 0
0
0
0
0
4.9
4.9
0
0
4.9
4.9
4.5 4.94.7
4.9
11.6
11.6
0
0 0
0
0
PHONO MM EQ AMP
INPUT SELECTOR
TAPE MONITOR
P-E69/J59
TO VIDEO(1) C-2
P-E67/J67
D-8
P-E65/J55
B-8
P-E68/J58
H-2
P-E71/J61
: NOT USED
: USED CIRCUIT CHANGES BY MARKET. A-5
P-E69/J59
A-5
P-E69/J59
I-3
P-E65/J55
J-4
P-E72/J62 (J,U,C,A,L,R,T models)
P-E73 (B,G models)
H-5
8
1 3
2
6
5
47
5
68
7
2
3
41
1
7
45 6 83
22
3 65
7 8
41 5 32
1 8
6
47 3
6
5
47 2
1 8
IC21
Page 2
RX-V795a/RDS/HTR-5170/DSP-R795a
ABCDE FGH I J K
L
1
2
3
4
5
6
7
8
INPUT & VIDEO SCHEMATIC DIAGRAM (INPUT & VIDEO)
* All voltage are measured with a 10M
-„¦/DC electric volt meter.
* Components having special characteristics are marked
Zand
must be replaced with parts having specifications equal to those
originally installed.
* Schematic diagram is subject to change without notice.
E-67/J-57
IC17 : LC78211
Analog Function Switch IC11 : NJM2068MD
IC12, 20 :
µPC4570G2
IC13, 15, 16 : M5220FP
Dual OP Amp
IC18 : LC78213
Analog Function Switch
IC19 : LC78212
Analog Function SwitchIC402~404, 407, 408 : LA7956
Video Switch IC401 : TC4053BP
Triple 2-Channel Analog Multiplexers/
Demultiplexers
Other ICs
IC21 : HD6433397A97F-†’ See page E-36/J-30
IC406 : LC74781-9626-†’ See page E-35/J-29
IC405 :
µPD4066BC
Quad Analog Switch/Multiplexer
16VDD LOGIC LEVEL CONVERTER
12OX
7VEE
6INH
OUT C IN
13IX
OUT C IN
2OY
OUT C IN
1IY
OUT C IN
5OZ
OUT C IN
3IZ
OUT C IN
4Z-COMMON15 14X-COMMON
Y-COMMON
9C10B11A
8VSS
REAR L
CENTER
5.0
5.7
5.6
5.6 11.1
0
0
11.1
0
0
5.0
0 0.11.11.8
0.7
00 8.88.8
9.3
9.39.8
0
0 9.8 0
0.5 0.5
1.1 2.7 2.7 2.7 3.4 0.1
0.311.1
1.52.12.5
2.5
0.5
0.50
5.0
0
4.4
4.9
1.9
1.1 4.3 4.35.0
1.1000 2.5
0
11.1 3.8
3.83.8
5.3
3.8
3.8
3.85.30
11.5
11.3
11.1
0
11.5
11.3
0 0
11.1 11.3
3.8
3.8
11.1
3.8
0
3.8
11.5
11.3
5.6
2.40 5.0
5.0
5.0
0
5.0
0
2.0
5.0
1.1
0
1.1 2.5
0
0.1
2.4
2.4
4.9
4.9
0
5.011.1
3.8
0
3.8
11.5
11.3
5.711.1
3.8
0
3.8
11.5
11.3
5.7
1.1 1.52.2
1.0
0
0.5
0.5
5.0
5.0 0
0
011.1
5.6
5.6
11.1
11.5
0
5.0 11.1
5.7
0 11.1
5.60.7
0.7
0.7
023.8
23.8 0.7
0.7 1.3
AC12.6
SUB POWER SUPPLY S-VIDEO AMP & SELECTOR
SUPERIMPOSE
REGULATOR SYNC SIGNAL
DETECTORSPEAKER
RELAY DRIVE
P-E66/J56
D-8
P-E69/J59
I-2
P-E70/J60
I-6
TO MAIN (1) TO MAIN (5)
P-E68/J58
A-1
P-E71/J61 TO MAIN (2)
G-2
P-E70/J60 TO MAIN (1)
I-5
CIRCUIT CHANGES BY MARKET.
: NOT USED
: USED
IC406
