SHARP 14R2DC
Instrukcja Serwisowa

14R2DC 14AG2-DC

TROUBLE SHOOTING FLOWCHART

NO RASTER
AC and DC AC

Is the power source AC or it is DC 12V?

DC

Is voltage (DB of the battery cable. Check F701. Blown out. Connector) terminal normal? Check F1701, F1702, Is DC POWER. R1732, R1742 or the circuit of the periphery. Replace the fuse.

Check T701 pin (11) voltage (Approx. 310V at 220V AC) R701 R707 Check IC701, D701 and C705.

DC POWER SW by The fuse is again blown out. Check Q1705, Q1707, does the reray S2201 and peripheral circuit. (RY1701) turned on. Does the voltage of about
Check Secondary Main+B

Does the pulse appear at 5 V appear at Pin(14) Pin(9) and (10) of IC1702?
(Approx. 130V) Check F1707, F1702. K1-K5 bias. brightly) turns on. drain of Q1709,Q1710.

Does the pulse appear at Check CRT Unit connector D1001 (Power LED Red Check D751 IC1702 2 pin terminal voltage is about 3V. D1001 (Power LED Red

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Q1701, Q1706, IC1707, Q1701 and Unit. IC801. oscillate ? Check IC1702 and peripheral circuit.

Check Q1709, Q1710, dimlr) on or turns Q1702, Q1703 and ON/OFF. peripheral circuit. R618 and R619. CRT Check Check IC1701,

+B(130V), S-OUT VCC? Does horizontal circuit

Checking the Does the voltage appear at peripheral circuit. protector circuit.

Check F1703, F1704, F1705, F1706 Check Q752 and IC801. peripheral circuit.

~ DC12V use the car battery of 12V or DC power supply more than 10A.

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