Toshiba Repair Tips

Search: toshiba
Results: 5603

Make	Model	Symptom	Problem
TOSHIBA	TVC2056	Doesn't work, just turns on the stand-by LED	The television does not turn on when the on button on the remote control is pressed. check the power supply voltages, they will be normal, but the horizontal oscillator does not work, as there is no supply voltage for this circuit. This power comes from the power supply, and first passes through the activation circuit, controlled by the microprocessor (ica01), in this case we activate the TV using the remote control. In this circuit, when turning on the TV, the voltage at pin 16 of the computer is at 0v, cutting (qa17) and (q810) allowing the 114v voltage to saturate the (q809) sending the 20v voltage to the horizontal oscillator. check the voltages on these transistors with pin 16 of the computer at 0v (TV on) note that (q809) is cut due to the short found in (q810), which diverts the base voltage from (q809) to ground. Replace the (q810), and the TV will work normally.
TOSHIBA	147CR	No image, normal sound and on-screen functions	Firstly check the voltages on the video output transistors. Note that there is no voltage across the bases of these transistors. the bases are connected to pins 22, 23 and 24 ci (ic501). test the voltages on the other pins of the ci and they will be normal, however with a small drop on pin 17. replace the ci and the television will work normally.
TOSHIBA	FAX TOSHIBA, MODELO 4700	Keyboard and display do not work.	It could be a 10x50v capacitor c1 that sticks to the keyboard board very close to the connector. it bursts and leaks liquid onto the plate. or as a last resort the ic2 (t7778a) which is also on the keyboard board.
TOSHIBA	INFORMAçãO TéCNICA	Some defects vcx 687/688/791/792	C508 does not turn on c545 does not turn on the drum c542 does not turn on the c/r c371 without tape image c325 without tape image c323 without tape image c348 without tape image c351 without color c322 without tape image and rf c326 without tape image and rf obs c542e c371 are 680pf the others are 0.1uf
TOSHIBA	1022HAV/1484HAV/2084HAV/1485HM/2085HM/2087HMS/2086HMS	Burning, heating or non-oscillation of transistor q404 (buh315-ne 587207 or 2sd 1877)	In chassis u13 the transistor q404 used can be either buh315 or 2sd1877, always respecting the value of resistor r444 with its respective transistor. Any change in the value of the res?_ ?d?distor located between the base and emitter of the q404 causes it to not oscillate correctly, causing it to heat up and burn out. We ask that you always check the value of the r444 resistor used in the device, whatever the reason for entering the workshop, in order to avoid further damage later. q404 (buh-315) use resistor pos.sq. r444 (33r). q404 (2sd-1877) use resistor pos.left.r444 (56r).
TOSHIBA	2056	Doesn't start	I got this Toshiba completely inoperative, not even the stand-by LED lit up. Analyzing it I realized that the 5v +b was very low and the regulator (5v) was getting very hot. Following the 5v line I reached pin 42 of the computer, there is a 6v2 zener, it was shorted. I changed it and the TV worked perfectly ok? tip sent by: laureano
TOSHIBA	20A82 EAV	It didn't work and after changing the fly-back the brightness varies.	Change components connected to the abl pin of the fly-back
TOSHIBA	2987	With retrace line and turning off	The solution was a general resoldering of the tube PCI.
TOSHIBA	TV 2998EMS	Flashing green	R512
TOSHIBA	TV 2998EMS	Flashing green	R512
TOSHIBA	SEMP TV2092LAV	Turning on and off	Diodo d448
TOSHIBA	2079FMS	TV doesn't turn on and the voltage above the horizontal output is high	4r7 at r.864
TOSHIBA	SEMP 2070E	Oscillates gives a strong flash on the filament and cuts the oscillator	1000/500v e d827
TOSHIBA	U13	Image looking like a lightning bolt in the center of the screen	Varicap
TOSHIBA	TVC2082 EAV U6	Osd shaking vertically	C325 100uf 35v
TOSHIBA	SEMP U14	Does not obey remote control commandsDoes not obey remote control commands	Sensor with dust residue
TOSHIBA	SEMP U14	Inoperative, power supply does not start	R860 100k
TOSHIBA	SEMP U14	Dead	Q 801 faulty (str w5753) or
TOSHIBA	SEMP U14	Dark band at the top of the screen	C 308 100uf
TOSHIBA	SEMP U14	Dark band on the left side of the screen	C 446