Hitachi RAM-71QH5 Service Manual page 56

7. Peripheral circuit of microcomputer
Fig. 7-1 shows the microcomputer and its peripheral circuits.
G
Table 7-1, the basic operations of each circuit block, and Fig. 7-2, the system configuration.
SPM
terminal
DC current
Detection resistor
R24
R245
0V
C282
Is
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C224
0V
Q209
CT1
D104 R110 R338
C103
R108
C105
R221
0V 0V
0V 0V
Fig. 7-1 Peripheral circuit of microcomputer
– 65 –
12V
5V
R290
Q205
R291
0V
0V
5V
IC4
8
5
7
6
4
SPM
terminal
R249
R247
0V
0V
R248
5V
C281
0V
D205
R222
C283
0V
Outdoor
Microcomputer
48
Reset
9 IP cutter
60
Id
61
Is