Samsung SCX-5530FN/XAZ Service Manual page 48

System Overview
Length of Power Cord : 1830 50mm
Power Switch : Use
Feature
- Insulating Resistance : 100
- Withstanding Voltage : Must be no problem within 1 min.
(at 1000V-LV model / 1500Vac-HV model,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 : Bi-Wave 3kV ? Normal, 6KV - Common
Environment Condition
- Operating temperature range : 0
- Maintaining temperature range : -25
- Preserving Humidity Condition : 30%
- Operating atmospheric pressure range : 1atm
EMI Requirement : CISPR ,FCC, CE, MIC, C-Tick,
Safty Requrement :IEC950 UL1950, CSA950, C-UL,NOM, TUV, Semko, Nemko, iK, CB, CCC(CCIB), GOST, EPA,
Power Save
3) FUSER AC POWER CONTROL
Fuser(e-coil) 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/off 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 e-coil, and heat is occurred.
On the other hand, when the signal is off, the PC501 is off, the voltage is cut off at the gate of Triac, the Triac becomes
off, and then the e-coil is turned off.
Triac (Q501) feature : 24A-LV model / 16A-HV model, 600V SWITCHING
Phototriac Coupler (PC501)
- Turn On If Current : 15mA 50mA(Design: 16mA)
- High Repetive Peak Off State Voltage : Min 600V
Service Manual
3-30
or more (at DC 500V)
40
85
90% RH
Samsung Electronics