Sharp 72GF-66E service manual Description of Schematic Diagram

72GF-66E

DESCRIPTION OF SCHEMATIC DIAGRAM

SAFETY NOTE:

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 OPERATING.

IMPORTANT SAFETY NOTE:
PARTS MARKED WITH « ! » (	) ARE

IMPORTANT FOR MAINTAINING THE SAFETY OF THE SET. BE SURE TO REPLACE THESE PARTS WITH SPECIFIED ONES FOR MAINTAIN- ING 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 TRANSFORMER BETWEEN TV RECEIVER AND AC LINE TO ELIMINATE HAZ- ARD OF ELECTRIC SHOCK.

WAVEFORM MEASUREMENT CONDITION: Colour bar generator signal of 70 dB from RF input.

1 2

GND	GND
580V	1.3 KV 31.25 KHz
5	6
GND

NOTE:

1.The unit of resistance «ohm»is omitted (K=1000 ohms. M= Megaohm).

2.All resistors are 1/8 watt. unless otherwise noted.

3.All capacitors are mF, unless otherwise noted (P= mmF).

4.The capacitor with Part No. RC-FZ9XXXBMNJ is designed to with stand 63V.

5.The capacitor with Part No. RC-FZ4XXXBMNJ is designed to with stand 50V.

CAUTION

This circuit diagram is original one, therefore there may be light difference from yours.

3	4
GND	GND
4 Vp-p 31.25 KHz	350 Vp-p 100Hz
7	8

41 Vp-p 31.25 KHz	1.8 Vp-p 100Hz		3.3V 100Hz	45 Vp-p 113 KHz FM
9	10		11	12
19Vp-p 100Hz	GND	25 Vp-p 100Hz	1.15 Vp-p 31.25KHz	400Hz
13

400Hz

27