Ricoh Aficio SP 5100N, Руководство по обслуживанию

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Engine Hardware Specifications
G186 6-14 SM
ƒ Power Consumption
NO ITEM CH1 (+3.3 V) CH2 (+5 V) CH3 (+24 V) System
1 Stand-By 1.0 A 0.07 A 0.4 A AVG: 55 Wh
2 PRINTING 1.0 A 0.14 A 2.0 A AVG: 280 Wh
3 Sleep-Mode 0.8 A 0.01 A 0.4 A AVG: 10 Wh
ƒ Length of Power Cord: 50mm
ƒ Power Switch: Use
ƒ
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)
ƒ Environment Condition
- Operating temperature range: 0°C to 40°C
- Maintaining temperature range: -25°C to 85°C
- Preserving Humidity Condition: 30% to 90% RH
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 a passive circuit, so it turns the heater on/off by 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 occurs.
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.