Fan Control - Pioneer PDP-425CMX Service Manual

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1

7.1.7 FAN CONTROL

The fan is controlled by detecting the installation status (transversely, vertically, or inversely situated) of the unit, based on
A
temperature data from temperature sensors T1-T3 and T5.
(1) Locations of the temperature sensors
B
C
D
(2) Fan control
Menu
Detection Conditions of Installation Status
When the conditions described in the cell below are
not met
OSD ANGLE=H or
Detection conditions of a vertically or inversely:
MIRROR MODE=X
situated unit: T1 + 4 ºC < T3
Conditions for canceling:
Only by turning the power off then back on.
E
OSD ANGLE=V or
MIRROR MODE=Y
or XY
(Table 1) AUTO control
FAN Rotation Speed
OFF ↔ L
L ↔ M
M ↔ H
Abnormal temperature
F
162
1
2
SENB ASSY
* Temperature sensor T4 is not used.
(T1)
T3 > 40
Without Slot or With a
With a Slot Made by
Slot Made by Pioneer
Another Manufacturer
68
70
74
82
PDP-425CMX
2
3
VIDEO SLOT IF ASSY
(T5)
Fan Control
AUTO control
(temperature detection)
See Table 1 below.
Fixed at H
Fixed at H
(Unit: ºC) • The rotation speed of the fan is switched as shown in Table 1
above, upon detecting the temperature with sensors T1-T3 and
T5.
• As hysteresis for switching the rotation speed of the fan, the
55
status before switching is maintained for 30 seconds.
• When the detected temperature reaches the specified abnormal
65
temperature, a shutdown process will proceed.
69
• Even if the detected temperature becomes lower from the
temperatures specified for the rotation speed of L→OFF to those
82
specified for OFF, the fan keeps rotating at low speed (does not
stop). Setting the fan rotation speed to OFF is only possible by
turning the power off then back on.
3
4
SEND ASSY
(T2)
SENC ASSY
(T3)
Judged Installation Status
Transversely situated
Vertically or inversely situated
Vertically or inversely situated
4

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