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Outline Of The Operation - Pioneer krp-m01 Service Manual

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5

5.6 OUTLINE OF THE OPERATION

[1] SPECIFICATION OF THE FAN CONTROL
Block diagram
MAIN BLOCK Assy
Main_Ucom
The Main micro-
computer controls
the IF microcomputer
as a port expander.
IF_Ucom
Operation specifications
Exhaust FAN
DAC output
DAC2
(9V)
DAC1
(7V)
STOP
0xFF
Notes:
• The operating temperature of the fan is different from the ambient temperature, because the sensor temperature is read
by the microcomputer.
• The fan may not start rotating until the internal temperature of the unit reaches a certain level, such as immediately after
the unit is turned on.
• When the temperature rises, the sensor voltage of TEMP2 decreases.
• When the voltage of the DAC output for exhaust FAN decreases, rotation speed of FAN rises.
5
6
KEY/LED Assy
TEMP2
R
Detection of
disconnection
TEMP2
FAN_NG2
FAN_ON2
FAN_CONT2
-12.0
14.0
KRP-M01
6
7
Exhaust fan
FAN_VCC2
FAN_2_REG
0 to 9V
VOLT
CONTROL
26.0
30.0
7
8
A
B
C
D
62.0
ºC
E
F
65
8

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