Repair tips database, Service Manual free download,schematics,datasheets,eeprom bins,pcb,repair info for test equipment and electronics

Repair tips

Make	Model	Problem	Solution	Date

Found: 4
Sharp	DV3750	Dead - burnt out safety res R728	Replaced R728 3k3 ?w caused by D707 - pin 7 loptx	14-09-04
Sharp	DV3750H	Blank raster, virtually no pic/sound at sw on - int	Aft chan change no sound/pic, caused by corrupt NVM IC1002 24C02; replace with empty memchip & set up customer & service mode settings - usually caused by noisy 5v line; - replace D710 by 1N4937 - increase the value of C7145 to 2200uF/16V - add a 10nF/50V ceramic capacitor from pin 10 of IC1001 to ground - add a 10nF/50V ceramic capacitor from pin 39 of IC1001 and ground - fit a 8,2V zener diode between pins 4 and 5 of IC1002 (anode to pin 4) - fit a 8,2V zener diode between pins 3 and 6 of IC1002 (anode to pin 3)	14-09-04

Sharp	DV3750H	CHANGING SDA20561 - ( A528 ) TO SDA20561- ( A535 )	CHANGE BOTH IC 1001 AND IC1OO2 IC1001 Sharp RH-IX1492BMN2 IC1002 Sharp CH-IX1463CJH6	14-09-04
Sharp	DV3750H	Service mode entering	connect a jumper wire between terminals 2 and 6 of the service slot on the video PWB - press the MODE button on remote - SERV will appear on the screen - remove the jumper wire - use channel up/down to move between the options - use volume control buttons to change the data - use the standby button on remote to store settings - turn the set OFF with mains to exit service mode	14-09-04

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