21HF2-SS
10 – 1
21HF2-SS
Service Manual
CHAPTER 10.
DESCRIPTION OF SCHEMATIC DIAGRAM
[1] DESCRIPTION OF SCHEMATIC DIAGRAM
SAFETY NOTES:
NOTES:
1. DISCONNECT THE AC PLUG FROM THE AC OUTLET BEFORE
1. The unit of resistance "ohm" is omitted.
REPLACING PARTS.
(K = 1000 ohms, M = Mega ohm).
2. SEMICONDUCTOR HEAT SINKS SHOULD BE REGARDED AS
2. All resistors are 1/16 watt, unless otherwise noted.
POTENTIAL SHOCK HAZARDS WHEN THE CHASSIS IS OPERATING.
3. All capacitors are F, unless otherwise noted. (P = F).
IMPORTANT SAFETY NOTICE:
VOLTAGE MEASUREMENT CONDITIONS:
PARTS MARKED WITH "
" (
) ARE IMPOTANT FOR MAIN
1. Voltages in parenthesis measured with no signal.
TAINING THE SAFETY OF THE SET. BE SURE TO REPLACE THESE
2. V oltages without parenthesis measured with 3mV B
PARTS WITH SPECIFIED ONES FOR MAINTAINING THE SAFETY
& W or Colour signal.
AND PERFORMANCE OF THE SET.
3. All the voltages in each point are measured with
VTVM.
SERVICE PRECAUTION:
THE AREA ENCLOSED BY THIS LINE (— - — ) IS DIRECTLY
WAVEFORM MEASUREMENT CONDITIONS:
CONNECTED WITH AC MAINS VOLTAGE.
1. The colour bar generator signal of 1.0V peak
WHEN SERVICING THE AREA, CONNECT AN ISOLATING TRANS-
applied at pin (41) of IC801.
FORMER BETWEEN TV RECEIVER AND AC LINE TO ELIMINATE
2. Approximately 4V AGC bias .
HAZARD OF ELECTRIC SHOCK.
Summary of Contents for 21HF2-SS
Page 52: ...21HF2 SS 9 2 2 BLOCK DIAGRAM MAIN UNIT A B C D E F G H I J 1 2 3 4 5 6 7 8 9 10 ...
Page 53: ...21HF2 SS 9 3 11 12 13 14 15 16 17 18 19 10 ...
Page 56: ...21HF2 SS 11 2 2 SCHEMATIC DIAGRAM MAIN UNIT A B C D E F G H I J 1 2 3 4 5 6 7 8 9 10 ...
Page 57: ...21HF2 SS 11 3 11 12 13 14 15 16 17 18 19 10 ...
Page 59: ...21HF2 SS 12 2 11 12 13 14 15 16 17 18 19 10 ...
Page 60: ...21HF2 SS 12 3 2 MAIN UNIT Wiring Side A B C D E F G H I J 1 2 3 4 5 6 7 8 9 10 ...
