Pioneer PDP-507XC Service Manual page 291

1
10.5
SPECIFICATION ABOUT THE THERMAL PROTECTION
∗ The change of HI / LO have hysterisis curve below.
Reading Value of the Sensor and FAN Drive
A
T4
(Outside air
55 ºC)
T3
(Outside air
40 ºC)
T2
(Outside air
37 ºC)
T1
B
(Outside air
33 ºC)
T0
(Outside air
30 ºC)
FAN: STOP FAN: LO
Assign
T4 setting
C
T3 setting
Pin 76 TEMP2 T2 setting
T1 setting
T0 setting
Assign
Pin 149 (FAN_CONT)
Pin 17 (FAN_CONT_POW)
Unit State and Fan Drive
D
POWER PSW1
ON ON
ON ON DT_REC
−
OFF
[System block diagram]
MAIN UCOM
E
Operation when executing FAN control command
When executing [FCNS00], [FCNS01], [FCNS02] command, detect the FAN_NG signal. When NG is detected, it becomes shutdown.
When [FCNS03] command is executed, FAN_NG detection is not operated.
F
182
1
2
FAN: HIGH
AD Value
10 bit (Sensor Position)
440
568
592
627
653
FAN: HIGH FAN: LO
H H
H L
State
ON According to the reading value of above table sensor.
According to the reading value of above table sensor.
STB FAN_CONT: "L"
H: Vo = 9.5 V
L: Vo = 7 V
17
149
2
3
FAN: LO FAN: STOP
Aims Aims
(Outside Air)
55 ºC 55 ºC
40 ºC 40 ºC
37 ºC 37 ºC
33 ºC 33 ºC
30 ºC 30 ºC
STOP
L
−
Control
Vo
FAN_Vcc
REG
Vref=2.64V
H: On
L: Off
PDP-507XD
3
4
FAN: LO FAN: HIGH
FAN Operation
HIGH or LO
HIGH or LO
OFF
4
SD