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CPU
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2
1
A
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12
11
10
9
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1
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PSR-740 CIRCUIT DIAGRAM (DM1/2, MKS3, MKH, MKL, INV)
PSR-740
PSR-740
PSR-740
MKS3
MKH
DM
MKL
INV
L C D
to Back - light Assembly
Floppy Disk Drive
to PN1-CN8
to JACK-JK5
to AM-CN310
to MIC-JACK - CN5
to PN1-CN1
N.C.
to PN1-CN2
CPU
FDC
SRAM 1M
DECODER
INVETER
EPROM MAIN1 32M
EPROM MAIN2 32M
OR
OR
OR
OR
AND
AND
D-FF
DECODER
D-FF
TRANSISTOR ARRAY
TRANSISTOR ARRAY
TRANSISTOR ARRAY
SRAM 256K
LCDC
INVERTER
INVERTER
DRAM 4M
DRAM 4M
FDC
REG9V
REG5V
DC-DC CONVERTER
1/2
28CC1-8812655
28CC1-8811360
28CC1-8811360
2NA-8814265
28CC1-8814267
Note : See parts list for details of circuit board
component parts
:
: Mylar Capacitor
: Metal Oxide Film Resistor
Ceramic Capacitor
Содержание PortaTone PSR-640
Страница 4: ...4 PSR 740 PSR 640 ...
Страница 22: ...22 PSR 740 PSR 640 DM Circuit Board PSR 640 Component side Pattern side 2NA V350510 1 2 1 ...
Страница 27: ...27 PSR 740 PSR 640 ...
Страница 28: ...28 PSR 740 PSR 640 ...
Страница 32: ...32 PSR 740 PSR 640 ...
Страница 33: ...33 PSR 740 PSR 640 ...