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Explanation of Blocks - 2
2.
Secondary Power Block Circuit
2-1.
Block Diagram of Power Block Circuit
2-2.
Description of Voltage
The following voltages are generated by the power circuit and are used for the logic circuit
(Table 6)
Symbol
Voltage
Remark
VP
DC 25V
For driving printer, drawer
VLL
DC 11.4V~12.6V
For RS232C
VMM
DC –11.5V~ –12.5V
For RS232C
VCC
DC 5V
For LSI’s logic circuit
VBT
DC 5V / 3.6 ~ 4.2V
For memory back up
VBB
DC –25V
For driving display tube
VF
AC 4.0V ~ 4.5V
For heater of display tube
NMIIN#
DC 5V / 0V
Power level monitor signal 5V : normal power 0V : power failure
RES#
DC 5V / 0V
Reset signal for every LSI, and also the positive going edge of this signal is
the start up signal for the CPU
RAME
DC 5V / 0V
To be controlled by RES# signal, and to be used for protection of memory data
(meaning of “#”: ex.RES# = RES)
2-3.
Secondary Fuse
(Table 7)
Parts Number
Rating
Remark
F1
125V 3A
F2
125V 2A
Normal Blow Type
Transformer
Secondary
Tap
VP
DC-DC
Converter
Rectification
Circuit
Voltage
Regulator
VF
VBB
VBT
L.GND
P.GND
P-OFF
VMM
VCC
Power on/off detection circuit
NMIIN#
RES#
RAME
VLL
Voltage
Regulator
Voltage
Regulator
Switching
Regulator
INDEX
Содержание SX-6600F
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Страница 16: ...III ILLUSTRATION OF ECR ASSEMBLY MACHINE PARTS LIST PRINT INDEX ...
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