System Outline
Length of Power Cord : 1830 
50mm
Power Switch : Use
Feature
Insulating Resistance : 100
or more (at DC 500V)
Withstanding Voltage : Must be no problem within 1 min. (at 1000V
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 :
Environment Condition
Operating temperature range : 0 
40
Maintaining temperature range : 
85
Preserving Humidity Condition : 30% 
90% RH
Operating atmospheric pressure range : 1atm
EMI Requirement : CISPR ,FCC, CE, MIC
Safety Requrement :IEC950 UL1950, CSA950,
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 Phototriac (insulting part).
In other words, the AC control part is passive circuit, so it turns the heater on/of f with taking signal from engine control part.
When the HEATER ON signal is turned on at engine, the LED of PC501 (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 of f, the PC501 is off, the voltage is cut off at the gate of Triac, the Triac becomes off, and then the heat lamp is turned of f.
Triac (Q501) feature :
Phototriac Coupler (PC501)
Turn On If Current : 15mA 
50mA(Design: 16mA)
High Repetive Peak Off State Voltage : Min 600V
Service Manual
