Fuser Ac Power Control - Xerox WorkCentre PE16 Service Manual

6) Feature
- Insulating resistance : over 50M
- Insulating revisiting pressure : Must be no problem within 1 min. (at 1500 Vzc, 10 mA)
- Leaking voltage : under 3.5mA
- Running voltage : under 40 A peak (at 25°c, Cold start) Under 60 A peak (in other conditions)
- Rising Time : Within 2 Sec.
- Falling Time : Over 20 mSec.
- Surge : Ring Wave 6 KV-500 A (Normal, Common)
7) Environment Condition
- Operating temperature range : 0°c ~ 40°c
- Maintaining temperature range : -25°c ~ 85°c
- Maintaining humid range : 30% ~ 90% RH
- Operating atmospheric pressure range : 1
8) EMI Requirement :
CISPR ,FCC, CE, MIC, C-Tick,
9) Safety Requirement
- IEC950, C-UL, TUV, Semko, iK, CB, CCC, EPA,

4.4.3 Fuser AC Power Control

Fuser (HEAT LAMP) gets heat from AC power. The AC power controls the switch with the Triac, a semicon-
ductor switch. The 'On/Off control' is operated when the gate of the Triac is turned On/Off by Photo Triac
(insulting part).
In the other words, the AC control is a passive circuit, so it turns the heater On/Off using a signal from the
Engine Control.
When the 'HEATER ON' signal is turned on at Engine Control, the LED of PC1 (Photo Triac) turns on.
The blinking 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, supplying
heat to the heat roller.
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
remains off, and 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 Repetitive Peak Off State Voltage : Min 600V
WorkCentre PE16
(at 500 VDC )
Summary of product
Service Manual
4-15
July 2003