Table of Contents
Advertisement
E
Market
21Q-FG1F
Service Manual
21Q-FG1F
TV
CHAPTER 9.
DESCRIPTION OF SCHEMATIC DIAGRAM
[1] DESCRIPTION OF SCHEMATIC DIAGRAM
SAFETY NOTES:
1.
DISCONNECT THE AC PLUG FROM THE AC OUT-
LET BEFORE REPLACING PARTS.
SEMICONDUCTOR HEAT SINKS SHOULD BE RE-
2.
GARDED AS POTENTIAL SHOCK HAZARDS
WHEN THE CHASSIS IS OPERATING.
IMPORTANT SAFETY NOTICE:
PARTS MARKED WITH "
TANT FOR MAINTAINING THE SAFETY OF THE SET.
BE SURE TO REPLACE THESE PARTS WITH SPECI-
FIED ONES FOR MAINTAINING THE SAFETY AND
PERFORMANCE OF THE SET.
SERVICE PRECAUTION:
THE AREA ENCLOSED BY THIS LINE (
RECTLY CONNECTED WITH AC MAINS VOLTAGE.
WHEN SERVICING THE AREA, CONNECT AN ISOLAT-
ING TRANSFORMER BETWEEN TV RECEIVER AND
AC LINE TO ELIMINATE HAZARD OF ELECTRIC
SHOCK.
CAUTION:
This circuit diagram is a standard one, prited circuits may
be subject to change for product improvement without pri-
or notice.
" (
) ARE IMPO-
-
) IS DI-
21F-PD250 / 21F-PT220 / 21F-PA18 / 21F-PA18(B)
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 µF, unless otherwise noted.
(P = µµF).
VOLTAGE MEASUREMENT CONDITIONS:
1.
Voltages in parenthesis measured with no signal.
2.
Voltages without parenthesis measured with 3mV B & W
or Colour 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 (41) of IC801.
25
2.
Approximately 4V AGC bias.
9 – 1
Hide quick links:
Advertisement
Table of Contents
