Description Of Schematic Diagram; Voltage Measurement Conditions; Waveform Measurement Conditions - Sharp 21ES251E Service Manual

DESCRIPTION OF SCHEMATIC DIAGRAM

SAFETY NOTES:
1. DISCONNECT THE AC PLUG FROM THE AC OUTLET BEFORE
REPLACING PARTS.
2. SEMICONDUCTOR HEAT SINKS SHOULD BE REGARDED AS
POTENTIAL SHOCK HAZARDS WHEN THE CHASSIS IS OP-
ERATING.
IMPORTANT SAFETY NOTICE:
PARTS MARKED WITH " " (
MAINTAINING THE SAFETY OF THE SET. BE SURE TO RE-
PLACE THESE PARTS WITH SPECIFIED ONES FOR MAINTAIN-
ING THE SAFETY AND PERFORMANCE OF THE SET.
SERVICE PRECAUTION:
THE AREA ENCLOSED BY THIS LINE (
CONNECTED WITH AC MAINS VOLTAGE.
WHEN SERVICING THE AREA, CONNECT AN ISOLATING TRANS-
FORMER BETWEEN TV RECEIVER AND AC LINE TO ELIMINATE
HAZARD OF ELECTRIC SHOCK.
NOTES:
1. The unit of resistance "ohm" is omitted.
2. All resistors are 1/16 watt, unless otherwise noted.
3. All capacitors are m F, unless otherwise noted. (P = mm F).

VOLTAGE MEASUREMENT CONDITIONS:

1. Voltages in parenthesis measured with no signal.
) ARE IMPORTANT FOR
2. Voltages without parenthesis measured with 3mV B & W or Col-
3. All the voltages in each point are measured with VTVM.
) IS DIRECTLY

WAVEFORM MEASUREMENT CONDITIONS:

1. The colour bar generator signal of 1.0V peak applied at pin (24)
2. Approximately 4V AGC bias .
20
(K = 1000 ohms, M = Mega ohm).
our signal.
of IC201.