Sharp 21KF-80 (serv.man10) Service Manual ▷ View online
27
21KF-80H
SCHEMATIC DIAGRAMS
Description
Waveforms
Service precaution:
The area enclosed by this line is directly ( )
connected with AC mains voltage.
When servicing the area, connect an insulating
transformer between TV receiver and AC line to
eliminate hazard of electric shock.
The area enclosed by this line is directly ( )
connected with AC mains voltage.
When servicing the area, connect an insulating
transformer between TV receiver and AC line to
eliminate hazard of electric shock.
Waveform measurement condition:
Colour bar generator signal of 70 dB from RF input.
Colour bar generator signal of 70 dB from RF input.
1. The unit of resistance «ohm»is omitted (K=1000 ohms.
M= Megaohm).
2. All resistors are 1/16 watt. unless otherwise noted.
3. All capacitors are
M= Megaohm).
2. All resistors are 1/16 watt. unless otherwise noted.
3. All capacitors are
µF, unless otherwise noted (P= µµF).
4. The capacitor with Part No. RC-FZ9XXXBMNJ is de-
signed to with stand 63V.
5. The capacitor with Part No. RC-FZ4XXXBMNJ is de-
signed to with stand 50V.
signed to with stand 63V.
5. The capacitor with Part No. RC-FZ4XXXBMNJ is de-
signed to with stand 50V.
Note:
CAUTION
This circuit diagram is original one, therefore
there may be slight difference from yours.
This circuit diagram is original one, therefore
there may be slight difference from yours.
Important safety note:
Parts marked with «
» (
) are important
for 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.
place these parts with specified ones for maintain-
ing the safety and performance of the set.
!
Safety note:
1. Disconnect the AC plug from the AC outlet be-
fore replacing parts.
1. Disconnect the AC plug from the AC outlet be-
fore replacing parts.
2. Semiconductor heat sinks should be regarded
as potential shock hazards when the chassis is
operating.
as potential shock hazards when the chassis is
operating.
28
21KF-80H
29
21KF-80H
Schematic Diagram of CRT Unit (F7341N0)
1
I
H
G
F
E
D
C
B
A
2
3
4
5
6
7
30
21KF-80H
Page 31
1
I
H
G
F
E
D
C
B
A
2
3
4
5
6
7
Schematic Diagram of Mother Unit (F7340N9)
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