Fan And Temperature Sensor - Pioneer PDP-5020FD Service Manual

1
A

Fan and temperature sensor

Circuit configuration
IO Assy
SENSOR
B
FAN
FAN
FAN
FAN
C
Specifications for port monitoring
Port Name SD/PD Indication
FAN_NG2 FAN
TEMP2 High temperature at
D
MTB
Panel temperature is
TEMP1
high
Panel temperature is
low
E
F
86
1
2
MAIN Assy
TEMP2
FAN CONNECT
Assy
FAN_VCC1/FA_VCC2
OR
PANEL SENSOR
Assy
SENSOR
Active Monitoring conditions
Shutdown occurs when
RST2 = H and FAN_ON2 = H
the signal is "H."
(Monitoring starts 3 sec after the
1 S ∗ 3 times
above conditions are established.)
Shutdown occurs if any RST4 = H
values equal to or (Monitoring starts 1 sec after the
greater than minimum to above conditions are established.)
require a shutdown are
detected.
1 S ∗ 3 times
Shutdown occurs if any Digital video RST2 = H
values equal to or
greater than minimum to
require a shutdown are
detected.
200 mS ∗ 5 times
(average)
PDP-5020FD
2
3
V+3_3V_UCOM
PULL_U
TEMP2
FAN ON2
Drive
FAN CONT2
Circuit
FAN_NG2 (H act)
DIGITAL Assy
TEMP1
MODULE_
UCOM
PULL_D
Shutdown occurs immediately
Blue LED flashes 10 times
In the Panel screen ON: Shutdown occurs after the
warning indication is displayed for 30 sec.
In the Functional STB: Shutdown occurs immediately
Blue LED flashes 11 times
Shutdown occurs after waiting for 30 sec.
Blue LED flashes 4 times
Shutdown occurs after waiting for 3 sec.
Blue LED flashes 4 times
3
4
IF_UCOM
DAC
MAIN_UCOM
Operation
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