Repair Tips




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MakeModel Ch.SymptomProblem SolutionSolutionBy:
Samsung SV-2303 SV633
Intermittent functionsCheck for dry joints on mode switch and clean off any grease inside the switch
Philips 27CE4599-33R 2B
Red raster and red flyback linesOne of the paralelled 75 kohm resistors of red was open, replaced with 47K in series with 27K and fault gone fault seeking in RGB output difficult due to intelligent auto calibrating-cutoff driver with picture mute TDA4580
Sony KV2032
Keeps changing channelCheck voltage on D12 if below 4.8V then change
Fidelity CTV3221
DeadCheck all high value resistors in primary of the p.s.u. If the fuse is blown, expect to replace I1, Q1 and R1 as well, Probably best to do all three and check the rectifier diodes
Watson FA3629-B 11AK19-E3
No soundR829 4.7 ohm o/c
Panasonic NV-HD100
Display dead rest of functions okChange transistor Q1701 on Timer operation board
Philips 27CE4599-33R 2B
Smearing out of one or several colors, best seen in txt-mode, my 27CE4599/30R smeared out in red and green, not in blue, fully exchanging the drivers input and output complete, otherwise the RGB driver will blank the crt moved the fault to the other colorReplace the 180K feedback resistors in the amplifiers with normal 1/4W metal film instead of 1/8W, they can become open circuited in mine both green and red were faulty in this way. Change all 3 and not just the defective ones, replace also all the paralleled 75K resistors per color fe by 47K+27K to prevent bright color raster they can also become open circuit
Philips L6.2
No sound, no picture and the power supply makes a loud and low tone chirping noiseReplace shorted Capacitor 2912 2n2, 2kV on the deflection module. Note that 2912 is hard to find. It should be blue. If it's brown it's bust
Philips CP110
Operating fine good picture, sound and control but sometimes sharp sounds coming from the set not via audio, sounding like the LOPT but more loud, sharp and variable 15 KhzThe long coil next to the LOPT was resonating/generating sound not the LOPT itself, solved by cleaning the top and putting a bubble of silicone kit on it, and after temporarily removing the coil from the pcb fixating a ty-wrap strongly around the bottom increasing the magnet-ferrite contact-pressure and stiffness of plastic support construction
Philips 37TA1070 CTT-H AA
No tuning voltage on tuner. Goes for: Philips and Magnavox versions. Also the Radiotone TV386VT-SCART which is the sameResistor 3602 8Kohm broken. It is in the 95Volts line providing 33V for tuning circuit. This uses the same processor as the GR1-AX which also might have the same problem. In that case resistor 3702 is to blame
Philips GR1AX
No tuningCheck R3703 for o/c and R3702. Also in CTT-H AA , then R3602
Toshiba 145R7B
DeadD808 s/c due to high HT caused by faulty switch mode ic STR50020
Hitachi C28W410SN
Sound crackles and whistles a short time after switch-on. Gets worse as set warms upSolder all links and components that have unpainted copper areas around component legs on upper side of main board near to the audio processing I.C. The same applies to the components near the microprocessor
Toshiba 219T9B
Intermittent field collapse after a few hoursReplace field output chip IC303 AN5515
Telefunken TX92
Initial rustle of high voltage then nothing, goes to standby, same with remote or front panel controlsR12 burnt out 0.22ohms, replacing this plus the IC01 vertical IC TDA8177 got set working. NB: also check D01 for shorts
Jrc CTV2090 Nokia Graetz
Dead set, line fuse openReplaced shorted chopper transistor S2000AF, replaced bulging/defective caps C507 2.2uF, 160v, C707 4.7uF 160v, C752 10uF, 160v and C759 100uF, 50v. All with 105 degree types . Plus line fuse 2.5amps
Toshiba 215R8N
Severe vertical distortion- `egghead` symptomsReplaced c317 in vertical cct 2.2uf, 50v substituted 4.7uF. Must be 105ºtype!!
Hitachi C28W410SN A7
The set reverts to standby intermittentlySet HT control had invisible dry joints
Philips GR1AX
TV will not start, seems deadFirst measure the 100 volt rail, if it is missing, then desolder the field output transformer, then recheck the 100 volt again, if it is now present, replace the transformer : the type = 37622 replacement = fat 30057 Konig. After that everything was ok!
Saba 615 TX92F
At startup, synchronisation vertical as well as horizontal is very weak, after max. 15 minutes everything is ok. Sometimes there is no pictureFirst check all capacitors in the power supply. The real problem was spotted in the IF-area, the shielded space near the tuner: replace all capacitors there, especially the 2.2uF/100 volt type. I replaced it with a 3.3uF/100 volt type with excellent results!