Waveforms; Description Of Schematic Diagram - Sharp 21XF30 Service Manual

2) 4.08 Vp-p
1) 0.98 Vp-p
Horiz Rate Horiz Rate
7) 109.6 Vp-p 8) 3.32 Vp-p
Horiz Rate Vert Rate
13) 0.18 Vp-p 14) 5.72 Vp-p
Vert Rate
Vert Rate
19) 1.9 Vp-p (V)
Horiz Rate

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 " å " (
MAINTAINING THE SAFETY OF THE SET. BE SURE TO REPLACE
THESE PARTS WITH SPECIFIED ONES FOR MAINTAINING THE
SAFETY AND PERFORMANCE OF THE SET.
SERVICE PRECAUTION:
THE AREA ENCLOSED BY THIS LINE ( —– - —– ) IS DIRECTLY
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.

WAVEFORMS

3) 3.68 Vp-p
Horiz Rate
9) 2.28 Vp-p
Horiz Rate
15) 55.2 Vp-p
Vert Rate
) ARE IMPORTANT FOR
31
4) 4.2 Vp-p
5) 88.8 Vp-p
Horiz Rate Horiz Rate
10) 138 Vp-p
11) 9.12 Vp-p
Horiz Rate Horiz Rate
17) 1104 Vp-p
16) 170 Vp-p
Horiz Rate Horiz Rate
NOTES:
1. The unit of resistance "ohm" is omitted.
(K = 1000 ohms, M = Mega ohm).
2. All resistors are 1/16 watt, unless otherwise noted.
3. All capacitors are µ F, unless otherwise noted. (P = µµ F).
VOLTAGE MEASUREMENT CONDITIONS:
1. Voltages in parenthesis measured with no signal.
2. Voltages without parenthesis measured with 3mV B & W or Col-
our signal.
3. All the voltages in each point are measured with VTVM.
WAVEFORM MEASUREMENT CONDITIONS:
1. The colour bar generator signal of 1.0V peak applied at pin (24)
of IC201.
2. Approximately 4V AGC bias .
21XF30
21XF50
6) 107.2 Vp-p
Horiz Rate
12) 0.13 Vp-p
Vert Rate
18) 324 Vp-p (AC110V)
485 Vp-p (AC220V)