Specification About The Thermal Protection - Pioneer PDP-6071PU Service Manual

5
10.5

SPECIFICATION ABOUT THE THERMAL PROTECTION

∗ The change of HI / LO have hysterisis curve below.
Reading Value of The Sensor and FAN Drive.
T4
(Outside air 131F)
T3
(Outside air 100F)
T2
(Outside air 94F)
T1
(Outside air 82F)
T0
(Outside air 77F)
FAN: STOP FAN: LO
Assign
Pin 76
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.
Assign
Pin 149
(FAN_CONT)
Pin 17
(FAN_CONT_POW)
Set State and FAN Drive
Power
ON
OFF
[ Outline Circuit ]
U-COM
5
6
FAN: HIGH
AD Value
10bit
TEMP2 T4 setting 424
T3 setting 566
T2 setting 601
T1 setting 653
T0 setting 679
FAN: HIGH FAN: LO
H H
H
L
PSW1 State
ON ON According to the reading value of above table sensor.
STB FAN_CONT: "L"
15
H : Vo = 11V 47
L : Vo = 7.6V
17
33
149
FAN_CONT
6
7
FAN: LO FAN: STOP
AD Value Sensor Aims
8bit Temp. (Outside Air)
106 268F
142 104F
150 97F
163 86F
170 80F
OFF This model control the FAN drive by pin 149 (FAN ON / OFF)
and pin 17 (Change of FAN control voltage) of MAIN U-com.
L
–
Control
Vo
FAN_vcc
REG
Vref = 2.64V
H: On
L: Off
PDP-6071PU
7
FAN: LO FAN: HIGH
131F SD
Low → High
100F
High → Low
94F
STOP → Low
82F
Low → STOP
77F
Fan Operation
HIGH or LO
OFF
8
A
B
SD
C
D
E
F
193
8