Psr-740 Block Diagram - Yamaha PORTATONE PSR-740 Service Manual

PSR-740/PSR-640

PSR-740 BLOCK DIAGRAM

IC33
IC29
5
7
17-19 21
IC24
13
14
27
28
29
81
101
135
136
IC23
134 102,103
77
76,222,225
IC25
86,98,99
IC30
IC26
6
TA2
123 122
120
114
IC6
108
IC4
94,96
43
5
48
114
IC15
IC10
IC28 IC14 IC14
34
35
234
232
231
IC32
IC22 8
33
IC3
IC31
IC27
PN
TA1 IC16
19
IC21
IC19 IC18 IC20
17
11 11
10 13 14 37
IC11 IC12 IC9 IC13
(2)
(1)
11 13 32 11 13 32 22 24 29 4
14 29 28 13 14 29 28 13
(1) (2)
IC7 IC8
IC2
IC1
IC1
IC17 IC5
6
IC2
4 39
1 3 5 7 20 21 40
PC1
15
14
13
12
11
IC14
IC15
IC310
IC410
IC610
IC210,220
IC320
IC710
IC510
28CA1-8814457