Samsung SCX-4100 Fuser AC Power Control, Feature, Environment Condition, Safty Requrement

Summary of product

6)Feature

-Insulation resistance : over 50M Ω (at DC500V)

-Insulation retest pressure : Must be no problem within 1min. (at 1500Vzc, 10mA)

-Leakage voltage : under 3.5mA

-Running voltage : under 40A peak (at 25°c, Cold start) Under 60A peak (in other conditions)

-Rise Time : Within 2Sec

-Fall Time : Over 20ms

-Surge : Ring Wave 6KV-500A (Normal, Common)

7)Environment Condition

-Operating temperature range : 0°c ~ 40°c

-Storage temperature range : -25°c ~ 85°c

-Storage humidity range : 30% ~ 90% RH

-Operating atmospheric pressure range : 1

8)EMI Requirement : CISPR ,FCC, CE, MIC, C-Tick,

9)Safty Requrement

-IEC950 UL1950, CSA950, C-UL,Semko,iK,CB, CCC(CCIB),GOST, EPA,

4.4.3 Fuser AC Power Control

The Fuser (HEAT LAMP) is heated using AC power. The AC power is controlled by a Triac (THY1), a semiconductor switch. 'On/Off control' is achieved when the gate of the Triac is turned on/off by a Photo triac (PC1), this is an insulting part.

In the other words the AC control part is a passive circuit. It turns the heat lamp on/off by taking a signal from the engine control section. When the 'HEATER ON' signal is activated by the engine the LED of PC1 (Photo Triac) flashes. The flashing light causes the Triac (PC1) to switch and a voltage is supplied to the gate of Triac THY1.

As a result AC current flows in the heat lamp, and heat is produced. On the other hand, when the signal is off, PC1 is off, the voltage is cut off at the gate of Triac THY1, this Triac is therefore off, and thus the heat lamp is turned off.

1)Triac (THY1) feature

-12A,600V SWITCHING

2)Phototriac Coupler (PC3)

-Turn On If Current : 15mA ~ 50mA(Design: 16mA)

-High Repetive Peak Off State Voltage : Min 600V

Service Manual

Samsung Electronics

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