WLPCBoard

Lb50u Schematic

12 Schematic Diagram

Schematic Diagram for Model PT-LB50NTU/LB50U/LB50SU

IMPORTANT SAFETY NOTICE

THE SHADED AREA ON THiS SCHEMATIC DIAGRAM INCORPORATES SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM FIRE AND ELECTRICAL SHOCK HAZARDS,

WHEN SERVICING, IT IS ESSENTIAL THAT ONLY MANUFACTURER'S SPECIFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SHADED AREAS OF THE SCHEMATIC.

Schematic Diagram for Model PT-LB50NTE/EA, LB50E/EA, LB50SE/EA

Important Safety Notice

Components identified by the international symbol/^have special characteristics important for safety. When replacing any of these components, use only the manufacturer's specified ones.

Notes: 1. Resistor

All the resistors are carbon 1/4W resistors, unless marked as follows: The unit of resistance is an OHM [O] (K=1 000 M=1 000 000).

& : Temperature Compensation © : Polyester © : Metalized Polyester E3 ' Polypropylene

"S : Electrolytic

3. Coil

The unit of inductance is a H, unless otherwise noted.

4. Test Point

5. Voltage Measurement

The voltage is measured by art electronic voltmeter receiving the colorbar signal when af! the customer's controls are set to the standard condition.

6. Cofor code for the links between diagrams and circuit boards

From/To

To/From

Color code

Block diagram

Schematic diagram

Magenta

Schematic diagram

Schematic diagram

Green

Schematic diagram

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Circuit boards

Yellow

Schematic diagram

Waveforms

Cyan (Light blue)

7. HOT and COLD indications

The power circuit board contains a circuit area using a separate power supply to isolate the ground connection. The circuit is defined by HOT and COLD indications in the schematic diagram. Take the precautions below:

8. This schematic diagram is the latest at the time of printing and the subject to change without notice. Precautions:

1. NEVER touch the HOT part or the HOT and COLD parts at the same time, or you may get an electric shock.

2. NEVER short-circuit the HOT and COLD circuits, or the fuse may blow and the parts may break.

3. NEVER connect an instrument such oscilloscope to the HOT and COLD circuit simultaneously, or the fuse may blow. Connect the ground of instruments to the ground of the circuit being measured.

4. MAKE SURE to unplug the power cord from the power outlet before removing the chassis.

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