53
VSX-C300
7.1.3 Operation of the Fan-Control Line
1. Detection of the heat sink
The detection is carried out every other second by taking in the voltage of the thermistor at A/D (PORT 31).
2. According to the temperature detected, the following operation will be executed:
THRMO DCT Set voltage of A/D FAN START FAN MAX SP RELAY AMUTE
Display
0 to 0.1V
< 5
L
L
L
L
"THDCT NG" flashes for 5 seconds.
0.1V to 2.4V
5 to 122(60
°
C)
L
L
H
H
2.6V to 2.8V
(70
°
C)134 –
H
L
H
H
2.8V to 3.4V
(75
°
C)145 –
L
H
H
H
3.4V to 4.1V
(90
°
C)174 –
L
H
H
H
"HEAT UP" flashes for 5 seconds at 20-sec intervals.
4.1V –
(115
°
C)210 –
L
H
L
L
"OVERHEAT" flashes.
31 pin
15 pin
25 pin
64,66,67 pin
19 pin
• If you wish to switch FAN START from "H" to "L" and FAN MAX from "L" to "H," first set FAN START to "L," then after 100
µ
s, set
FAN MAX to "H."
• While "OVERHEAT" is flashing, only the POWER key is functional.
3. FAN operation
• Once the fan starts rotating, it continues to rotate at the same speed until the temperature falls to 65
°
C.
• Once the fan starts rotating, it continues to rotate for at least 20 seconds even after the temperature falls to the above-mentioned level.
4. Detection of abnormalities in the fan
• If any abnormality is detected in the fan 5 seconds after it starts rotating at high speed, and if H (abnormal) is indicated for the FANDCT
connector, "FAN STOP" is displayed for 5 seconds, then the power is turned off.
• While "FAN STOP" is displayed, AMUTE is on, and RELAY is off.
• While "FAN STOP" is displayed, only the POWER key is functional.
• While the fan is rotating at low speed, abnormality detection is not carried out.
5. Abnormality in the thermistor
If an abnormality (A/D voltage: 0.1 V or less) is detected in the thermistor, "THDCT NG" is displayed for 5 seconds, then the power is turned
off.
FAN Driver
Q404
2SC2712(GRBL)
Q405
DTA124EK
Q402
DTA124EK
R420
Q403
2SC2712(GRBL)
Q406
DTA124EK
1SS355
1SS355
1SS355
FAN Drive
5V
SW DCT
12V
V+12
+6V
-11.6V
IC4201
PDG264A
CN305
CN306
TERMO
DTC
V+5
FAN+
FAN-
FAN
STOP
Содержание VSX-C300
Страница 24: ...A B C D 1 2 3 4 1 2 3 4 24 VSX C300 CN802 B 1 5 VIDEO ASSY AWX7928 E VIDEO SIGNAL ROUTE E 3 9 VIDEO ASSY ...
Страница 36: ...VSX C300 36 A B C D 1 2 3 4 1 2 3 4 B IC1102 Q1101 IC1105 IC1401 IC1405 IC1403 Q1102 IC1101 IC1202 DSP ASSY B ...
Страница 41: ...VSX C300 41 A B C D 5 6 7 8 5 6 7 8 J SIDE B Q201 ANP7396 B ...
Страница 63: ...63 VSX C300 Pin Connection Anode Connection ...