Pioneer VSX-C100 Service Manual

VSX-C100-S
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C
D
F
A
B
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7.1.3 Operation of the Fan-Control Line
FAN Driver
Q404
2SC2712(GRBL)
Q405
DTA124EK
Q403
2SC2712(GRBL)
Q406
DTA124EK
1SS355
FAN Drive
+12V
GNDRY
IC4201
PDG269A
CN305
CN306
TERMO
DTC
V+5
FAN+
FAN-
FAN
STOP
1. Temperature detection of the heat sink
The detection is performed every 1 second by taking in the voltage of the thermistor at A/D (PORT 31).
2. Perform the following operation by detection temperature
• 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 µs, 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.
THRMO DCT
(pin 31)
A/D Setting Voltage
FAN LOW
(pin 51)
FAN HIGH
(pin 52)
SP RELAY
(pins 48-50)
AMUTE
(pin 53)
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.
4.0V - (110°C)204 - L H L L "OVERHEAT" flashes
Note: Pin No. shows pin No. of IC4201 (PDG269A).
FAN HIGH
FAN LOW

Pioneer VSX-C100 Specifications

General

Brand	Pioneer
Model	VSX-C100
Category	Stereo Receiver
Language	English