You can find out here if you have the same problems or symptoms of your televison. You can find the other brands of tv with same or similar symptom to get some ideas. Because the tv theory for all brands/manufacturer are same. So, these tv repair tips are suitable for use as a reference. Note: These troubleshooting tips are not guarantee that you can fix your unit right away and won’t solve all the component problems you may run into, but they should solve a good number of them. Servicetron.com is not responsible for any damage as a result of following any of this advice.
TELEFUNKEN TELEVISION REPAIR AND TIPS
Telefunken 415 even white raster t470 (bc238) was found to be leaky base to collector, it`s located along with most of the rest of the i.f circuit between the r.g.b and audio cards
Telefunken 615a chassis int / brightness flashing and int loss of vertical lock change the 2.1v zener in the p.s.u. (it is actually a silicon stabilizer and forward biased, unlike a zener) it can be replaced by three 1n4148 diodes in series
Telefunken 615a chassis narrow concave picture with foldovers about an inch apart check line scan coupling cap c184 (0.235uf,250v) for o/c
Telefunken 615a int. Brightness flashing and jumps. 2,1 volts zener in ps.(3*1n4148)
Telefunken 615a int. Brightness flashing and vertical lock hick-ups. Change 2,1 volts zener in ps. Actually it is a silicon stabilizer and forward biased, unlike a zener. It can be replaced by three 1n4148 diodes in series.
Telefunken 615a lo width/ew c431 4.7uf, 250v.
Telefunken 615a there was a narrow,concave picture. With foldover the line scan coupling capacitor c 184(0.235uf,250v) was open-circuit.
Telefunken 618a chassis dead, lop transistor fails after 1 day - 1 week check capacitor (2.2uf) in the base of the lop driver transistor, also check the (470uf) capacitor in the base of the lop transistor itself
Telefunken 618a not receiving infrared commands remove microcontroler for 3sec - 5sec
Telefunken 709 sync - pic break up & loss of line hold. Ech84.
Telefunken 711 small pic both ew modulator diodes
Telefunken 712 712 dead. Fu421 & bu208 blown.
Telefunken 712 dead. Fu421 & bu208 blown.
Telefunken a520s poor picture / ballooning / may be intermittentcheck for dry joints on the l.o.p transformer
Telefunken f531 int soundcheck for tarnished pins on the a.f panel plug
Telefunken fs533 int sound check for tarnished pins on the a.f panel plug
Telefunken mp514 ( tx805 chassis ) no raster but all other voltages ok dr03 in the microprocessor feedback circuitry, this references the vertical and horizontal outputs, was leaky and caused pin 26 of ir01 to stay at 2.4v.
Telefunken tx90 serv mode stby,off press remote vt & power on, press vt again
Telefunken tx90 service mode from stby, switch off tv mains hold vt on rc and switch on press vt again.