Pioneer PDP-5010FD Service Manual page 78

1
A
Fan and temperature sensor
Circuit configuration
TANSHI Assy
SENSOR
FAN
1
B
FAN
FAN
FAN
C
Specifications for port monitoring
Port Name SD/PD Indication
FAN_NG1 FAN1
D
FAN_NG2 FAN
TEMP2 High temperature at
MTB
E
High temperature in
TMP_NG
the drive circuits
Low temperature in
the drive circuits
F
78
1
2
MAIN Assy
V+3_3V_UCOM
PULL_U
TEMP2
FAN_12V
Drive
Circuit
FHD FAN
CONNECT Assy
FAN_12V
OR
PANEL SENSOR
Assy
SENSOR
Active Monitoring conditions
Shutdown occurs when
RST4 = H and FAN_ON1 = H
the signal is "H."
(Monitoring starts 3 sec after the
1 S ∗ 3 times
above conditions are established.)
Shutdown occurs when
RST4 = 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-5010FD
2
3
V+3_3V_UCOM
PULL_U
TEMP2
FAN ON1
FAN CONT1
FAN_NG1 (H act)
V+3_3V_UCOM
PULL_U
FAN ON2
Drive
FAN CONT2
Circuit
FAN_NG2 (H act)
DIGITAL Assy
TEMP1
MODULE_
UCOM
PULL_D
If FAN_NG1 (for details on detection logic, see "File of
fan-control specifications") is detected (established) under the
monitoring conditions, a shutdown process starts. A specific
LED flash pattern (blue LED, 10 times) starts.
The next PON operation is valid, and the flag is cleared upon
the next power-on.
If FAN_NG2 (for details on detection logic, see "File of
fan-control specifications") is detected (established) under the
monitoring conditions, a shutdown process starts. A specific
LED flash pattern (blue LED, 10 times) starts.
The next PON operation is valid, and the flag is cleared upon
the next power-on.
If any values equal to or greater than minimum to
require a shutdown are detected (established) under
the monitoring conditions, a warning indication will be
displayed for 30 sec, after which a shutdown process
starts. A specific LED flash pattern (blue LED, 11 times)
starts.
The next PON operation is valid, and the flag is cleared
upon the next power-on.
If any values equal to or greater than minimum to
require a shutdown is detected (established) under the
monitoring conditions, those changes in status will be
transmitted to the main microcomputer via the UART.
Upon receiving the data, a warning indication will be
displayed for 30 sec, after which a shutdown process
starts. The main microcomputer orders a specific LED
flash pattern (blue LED, 4 times).
The next PON operation is valid, and the flag is cleared
upon the next power-on.
If any values equal to or greater than minimum to
require a shutdown is detected (established) under the
monitoring conditions, those changes in status will be
transmitted to the main microcomputer via the UART.
Upon receiving the data, the main microcomputer
orders a specific LED flash pattern (blue LED, 4 times).
The next PON operation is valid, and the flag is cleared
upon the next power-on.
3
4
IF_UCOM
DAC
MAIN_UCOM
Operation
4