40
21YF30
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
" ( ) ARE IMPOTANT FOR
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.
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 (6) of
IC401.
2. Approximately 4V AGC bias .
Summary of Contents for 21YF30
Page 32: ...21YF30 32 SOLID STATE DEVICE BASE DIAGRAM TOP VIEW SIDE VIEW ...
Page 33: ...33 21YF30 M E M O ...
Page 34: ...34 21YF30 WAVEFORMS ...
Page 35: ...35 21YF30 CHASSIS LAYOUT ...
Page 36: ...36 21YF30 1 2 3 4 5 6 7 8 9 10 A B C D E F G H I J BLOCK DIAGRAM PWB A MAIN BLOCK ...
Page 37: ...37 21YF30 10 11 12 13 14 15 16 17 18 19 ...
Page 39: ...39 21YF30 1 2 3 4 5 6 7 8 9 10 A B C D E F G H I J PWB E S CONTROL BLOCK ...
Page 42: ...42 21YF30 1 2 3 4 5 6 7 8 9 10 A B C D E F G H I J SCHEMATIC DIAGRAM MAIN Unit ...
Page 43: ...43 21YF30 10 11 12 13 14 15 16 17 18 19 ...
Page 44: ...44 21YF30 1 2 3 4 5 6 7 8 9 10 A B C D E F G H I J SCHEMATIC DIAGRAM S CONTROL Unit ...
Page 46: ...46 21YF30 1 2 3 4 5 6 7 8 9 10 A B C D E F G H I J PWB A MAIN Unit Component Side ...
Page 47: ...47 21YF30 10 11 12 13 14 15 16 17 18 19 ...
Page 58: ...Ref No Part No Description Code Ref No Part No Description Code 58 21YF30 PACKING OF THE SET ...
Page 59: ...Ref No Part No Description Code Ref No Part No Description Code 59 21YF30 ...