Specification Of The Fan Control - Pioneer PDP-6010FD Service Manual

5

5.6.2 SPECIFICATION OF THE FAN CONTROL

Block diagram
The internal fan cools down the MTB and Power blocks.
The external fans cool down the whole unit.
DIGITAL Assy
Module_Ucom
If an emergency signal
is detected, it will be
transmitted.
Main_Ucom
IF_Ucom
MAIN Assy
Operation specifications
Internal FAN
HIGH
LOW
STOP
DAC output
External FAN
DAC2
DAC1
STOP
0xFF
Notes:
• The operating temperature of the fan is higher than the ambient temperature, because the sensor temperature is read by
the microcomputer.
• If the critical values for signals are displayed in the address circuit, the fan may be activated or be rotated at higher speed
in response to values lower than the set temperature values shown above.
• When the temperature rises, the sensor voltage of TEMP2 decreases.
• When the voltage of the DAC output for external FAN decreases, rotation speed of FAN rises.
5
6
TANSHI Assy
TEMP2
R
The Main micro-
computer controls
the IF microcomputer
as a port expander.
TEMP2
FAN_NG1
FAN_ON1
FAN_CONT1
FAN_NG2
FAN_ON2
FAN_CONT2
36.0 ºC 39.0 ºC 39.0 ºC 42.0 ºC
36.0 ºC 38.0 ºC
6
7
Internal fan External fans
Detection of
R
disconnection
Detection of
disconnection
FAN_VCC1
FAN_1_
0 to 12V
REG
VOLTAGE
CONTROL
46.0 ºC 60.0 ºC
PDP-6010FD
7
8
FHD FAN
CONNECT
OR
Assy
FAN_VCC2
FAN_2_
0 to 12V
REG
VOLTAGE
CONTROL
Temperature SD
62.0 ºC
62.0 ºC
8
A
B
C
D
E
F
75