Summary of Product
Service Manual
3-19
Samsung Electronics
• Feature
- Insulating Resistance : 50
or more (at DC 500V)
- Insulating revisiting pressure : Must be no problem within 1 min. (at 1500Vac,10mA)
- Leaking Current : under 3.5mA
- Running Current : under 40A PEAK (AT 25
, COLD START)
under 60A PEAK (In other conditions)
- Rising Time : within 2Sec
- Falling Time : over 20ms
- Surge : Ring Wave 6KV-500A (Normal, Common)
• Environment Condition
- Operating temperature range :
- Maintaining temperature range : -25 85
- Preserving Humidity Condition : 30% 90% RH
- Operating atmospheric pressure range :
3.3.2.3 FUSER AC POWER CONTROL
Fuser(HEAT LAMP) gets heat from AC power. The AV power controls the switch with the Triac, a semiconductor switch.
The
ON/OFF control is operated when the gate of the Triac is turned on/off by Photo triac (insulting part).
In other words, the AC control part is passive circuit, so it turns the heater on/off with taking signal from engine control
part.
When the
HEATER ON signal is turned on at engine, the LED of PC1 (Photo Triac) takes the voltage and flashes.
From the flashing light, the Triac part (light receiving part) takes the voltage, and the voltage is supplied to the gate of
Triac and flows into the Triac. As a result, the AC current flows in the heat lamp, and heat is occurred.
On the other hand, when the signal is off, the PC1 is off, the voltage is cut off at the gate of Triac, the Triac becomes off,
and then the heat lamp is turned off.
Triac (THY1) feature :12A, 600V SWITCHING
Phototriac Coupler (PC3)
Turn On If Current : 15mA 50mA(Design :16mA)
High Repetive Peak Off State Voltage : Min 600V
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