Mitsubishi Electric PD-4265, Service Manual, Page: 117 / 127

FAN
→
MAIN
MAIN
→
FAN
3
2
2
VDD+3.3V 3.3V power supply for analog signals
MAIN
→
FAN
TR
Clock line of the I2C bus
SENB
→
SEND
SENB
→
SEND
4 SDA5 Data line of the I2C bus
SENB
←→
SEND
TS 1 SCL5
SEND
→
SENC
3 VDD+3.3V 3.3V power supply for analog signals SEND
→
SENC
4 SDA5 Data line of the I2C bus
SEND
←→
SENC
AC power
OFF(Power
cord pulled
out ofthe wall
outlet)
AC power ON
(Power
cord connected
to the wall outlet)
Basic operation (Numerical unit: Vdc; except for the case when units are individually indicated)
No signal With signal
Signal direction
Main power ON (POWER button ON)
Power
management
Standby
Main power
OFF name Pin NO Pin name Function
During data
exchange:Clock
signal(3.3Vac),
Data not
exchanged:
3.3Vdc
During data
exchange:Clock
signal(3.3Vac),
Data not
exchanged:
3.3Vdc
Clock signal
used during
transmission
(3.3Vac)3.3Vdc
when no data
are transmitted.
During data
exchange:Clock
signal(3.3Vac),
Data not
exchanged:
3.3Vdc
During data
exchange:Clock
signal(3.3Vac),
Data not
exchanged:
3.3Vdc
Clock signal
used during
transmission
(3.3Vac)3.3Vdc
when no data
are transmitted.
GND
0
0
0
0
-
-
0 0
-
-
0
0 0
0
0
0
0 0
0 0
-
-
-
-
-
-
- - - - -
- - - - -
-
-
-
GND
FAN
→
MAIN
2
3 ALARM
2 GND GND
3 ALARM FAM Lock
0
0
0 0 0 0 0
0 0 0
-
-
0 0
-
0 0 0
-
0 0 0
-
-
3.3 3.3
0
0 0
-
-
-
-
-
0
0
0
0 0 0 0 0 0 -
-
-
0 0 0
0 0 0
0 0 0
0
0
0 0
0 0
0
0 0
0 0 0
3.3 3.3
FA
1
FAN-CTL
Voltage-
controllable
power supply
PD-4265
PD-5065
PD-4265
PD-4265
PD-5065
PD-5065
11.5Vdc
during high-
speed
revolution
(Fan mode H);
8.5Vdc during
medium speed
revolution
(Fan mode M);
6.5Vdc during
low-speed
revolution
(Fan mode L) 11.5Vdc
during high-
speed
revolution
(Fan mode H);
8.5Vdc during
medium speed
revolution
(Fan mode M);
6.5Vdc during
low-speed
revolution
(Fan mode L)
11.6Vdc
during high-
speed
revolution
(Fan mode H);
7.8Vdc during
medium speed
revolution
(Fan mode M);
5.3Vdc during
low-speed
revolution
(Fan mode L) 11.6Vdc
during high-
speed
revolution
(Fan mode H);
7.8Vdc during
medium speed
revolution
(Fan mode M);
5.3Vdc during
low-speed
revolution
(Fan mode L)
2 GND GND
3 ALARM FAN lock detect
signal output
FAN lock detect
signal output
0V during
normal fan
operation;3.3V
dc while the
fan is stopped.
0V during
normal fan
operation;3.3V
dc while the
fan is stopped.
0V during
normal fan
operation;3.3V
dc while the
fan is stopped. 0V during
normal fan
operation;3.3V
dc while the
fan is stopped.
FB
FC
1
1
FAN-CTL
FAN-CTL
Voltage-
controllable
power supply
Voltage-controllable power supply
0 11.5Vdc
during high-
speed
revolution
(Fan mode H);
8.5Vdc during
medium speed
revolution
(Fan mode M);
6.5Vdc during
low-speed
revolution
(Fan mode L)
11.5Vdc
during high-
speed
revolution
(Fan mode H);
8.5Vdc during
medium speed
revolution
(Fan mode M);
6.5Vdc during
low-speed
revolution
(Fan mode L)
0 11.5Vdc
during high-
speed
revolution
(Fan mode H);
7.6Vdc during
medium speed
revolution
(Fan mode M);
5.3Vdc during
low-speed
revolution
(Fan mode L)
11.5Vdc
during high-
speed
revolution
(Fan mode H);
7.6Vdc during
medium speed
revolution
(Fan mode M);
5.3Vdc during
low-speed
revolution
(Fan mode L)
GND
GND
GND
GND
PD-5065
115