SHARP 54GT25SC
Service Manual

54GT-25SC 54GT-26SC

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

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 µF, unless otherwise noted (P=

µµF).
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.
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 HAZARD OF ELECTRIC SHOCK. WAVEFORM MEASUREMENT CONDITION: Colour bar genetator signal of 70 dB from RF input.

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

Power circuit drive. Q701 Drain

H-output. Q601 colector

H-drive. Q601 Base

1

V. Division: 100V / Sec. Division: 5uS

2

V. Division: 200V / Sec. Division: 20uS.

3

V. Division: 2.0V / Sec. Division: 20uS

V-output. F 5pin

V-output. F 4pin

Video out. IC201 54pin

4

V. Division: 10V / Sec. Division: 5mS

5

V. Division: 2.0V / Sec. Division: 5mS

6

V. Division: 1V / Sec. Division: 20uS

H-sync. IC1001 19pin

V-sync. IC1001 24pin

Red cathode CRT socket 8pin

7

V. Division: 1V / Sec. Division: 20uS

8

V. Division: 1V / Sec. Division: 5mS

9

V. Division: 20V / Sec. Division: 20uS

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