Sindoh A610 Series, Service Manual

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LVPS Components and Main Functions
Block Diagram of Components
Components and Basic Functions
Basic LVPS components and their functions are as follows.
1. AC Switch: Open only one AC line (1-Pole type)
2. Varistor: Prevent rear circuit damage by short circuiting it when over current
leads in to input
3. BRIDGE DIODE / MAIN CAP : Rectify AC waves to DC
4. Noise Filter: Prevent noise lead in at input section
5. Photocoupler: Perform feedback to maintain output constant voltage
6. Photo Triac: Control the heater in the machine to turn on and off
7. Fuse (1
st
& 2
nd
): Protect rear circuit on over current lead in
Pin Array
1. INLET + AC SW
Connector
No.
Connector Name Manufacturer Image
Input Unit Power Converter Output Unit
Inlet
Overvoltage
Protection
Noise
Filter
Inrush Current
Limiter
Primary
Current
Primary Smoothing
Trance
Unit
Start
Circuit
+5V/+24.5V
Power Control
Protective Circuit
(Overcurrent)
(Overvoltage)
Heater Circuit
(Phase Control Zerocross)
Switching Unit
Drive Circuit
Feedback Circuit
Primary Control Unit
(Overcurrent Protection)
(Overvoltage Protection)
Control Circuit
On/Off Control