Service manual

28KF-84H

Waveform Measurement Condition

1. Test Equipment: Digital Oscilloscope; Colour TV Pattern Generator

2. Test Conditions: CH-12; Colour Bars; 70dB/µV From RF Input

3. TV Condition: Picture and Audio : Settings  Factory Presets ( Only in Audio Measures: Max. Volume With

Unplugged Speakers)

SCHEMATIC DIAGRAMS

Description

Waveforms

NOTE:

1. The unit of resistance « ohm »is omitted (K=1000

ohms. M= Megaohm).

2. All resistors are 1/8 watt. unless otherwise noted.

3. All capacitors are

µF, unless otherwise noted

(P=

µµF).

SERVICE PRECAUTION:

THE AREA ENCLOSED BY THIS LINE ( ) IS

DIRECTLY CONNECTED WITH AC MAINS VOLTAGE.

WHEN SERVICING THE AREA, CONNECT AN ISO-

LATING TRANSFORMER BETWEEN TV RECEIVER

AND AC LINE TO ELIMINATE HAZARD OF ELECTRIC

SHOCK.

CAUTION

This circuit diagram is original one, therefore

there may be slight difference from yours.

SAFETY NOTE:

1. DISCONNECT THE AC PLUG FROM THE AC

OUTLET BEFORE REPLACING PARTS.

2. SEMICONDUCTOR HEAT SINKS SHOULD

BE REGARDED AS POTENTIAL SHOCK HAZ-

ARDS WHEN THE CHASSIS IS OPERATING.

IMPORTANT SAFETY NOTE:

PARTS MARKED WITH « » ( )

ARE IMPORTANT FOR MAINTAINING THE

SAFETY OF THE SET. BE SURE TO REPLACE

THESE PARTS WITH SPECIFIED ONES FOR

MAINTAINING THE SAFETY AND PERFORM-

ANCE OF THE SET.

Red In

Green In

Blue In