Panasonic Repair Tips

Search: panasonic
Results: 2911

Make	Model	Symptom	Problem
PANASONIC	TC-29V60 / 33V60	Certain devices present a noise coming from the power supply circuit or the deflection yoke, this in turn can be noticed mainly when the television volume is low, in a silent external environment, it is noticed that the noise increases and decreases depending on the scenes lighter or darker.	Changing the power supply transformers t801 - ets39ag115ac t872 - ets29ak1w9ac 2) changing the deflection yoke this yoke cannot be a normal yoke available in stock, so for this change please contact ddg - 0800 55 9180. for information on the procedure to exchange this part.
PANASONIC	TC20C02	Retrace lines, screen with excessive brightness, flay-back focus control does not fully work, screen control cannot darken the screen, it only brightens it, and when you try to darken it using this setting, the screen is all blurred with green. channel indicator characters presenting inverted folding together with the same	Capacitor c519 - 4,7uf/450v aberto (seco)
PANASONIC	TODOS OS TV MODELOS QUE UTILIZAM O CHASSI MX3-R	Loss of tune after a few seconds	Procedures: a) access the service mode (note the values of the dacs). select functions b8 (for aft) and b9 (for rf agc) and change the values to the factory average values, b8 - 085 b9 - 040.( * ) b) check capacitors c121, c116, c112 and c111 , pin 27 - ic6001(rf-agc) and capacitors c122 and c127, pin 21 - ic1101(afc input). comments: (*) the values given for b8 and b9 in procedure a) cannot be used as standard values, but as average values as each TV has to be pre-adjusted later (the values serve only as a reference, in cases where the values are completely altered.)
PANASONIC	TC-14/20A8 / TC-14/20A9	Three to four retrace lines at the top of the screen. This symptom occurs when the memory (ic1102 - code s- 24c02adp) is changed or when the memory data is changed.	Enter service mode .chq3. and lower the vertical center .vc.
PANASONIC	CHASSI BR1L/BR1D -MODELOS TC-20G9 / TC-29A9 / TC-29G9	Problem detecting sap	Include the 820kΩ smd resistor r2212. This component is included on the printed circuit board.
PANASONIC	TV-14G7 TV-21G7	Loses color when playing tapes in places with high radio signal interference.	The video cassette image loses color in a certain place, even when a tape recorded in NTSC is inserted. the color disappears due to RF interference at the crystal frequency. modifications: 1) remove the mechanism and release the vcr plate from the chassis frame. 2) remove resistor r5601 and short circuit the area. If this doesn't work, do the items below: 3) desolder the c3053 capacitor. 4) insert the 3 pf smd capacitor c3002. 5) add the crystal vsxs0195 in position x3001.
PANASONIC	TV-21 / 14 G7	Changes on the power supply board phenomenon: fuse f801 blows.	Modification: 1-c882=0.047: remove capacitor c882 from its original position and solder it under the board between pins 2 and 4 of ic872 (str83159). Note: position the soldered capacitor under the board so that the capacitor is well away from the board, otherwise the capacitor may pick up interference from the AC power supply. 2-c884: change capacitor c884 from 220µ/16v to 10µ/16v. 3-c854: change capacitor c854 from 220µ/16v to 10µ/16v. 4-r878=3k9//33k: add a 33k resistor (1/5w) in parallel with r878(3k9). 5-r848=3k9//33k: add a 33k resistor (1/5w) in parallel with r848(3k9). 6-change the fuse f801 which is next to the main board selector, from 4a/125v (code ba1c40nu100) to a 4a/220v one (code xbav2c4r0tl35bs). 7- eliminate c844=0.033µ/1000v.
PANASONIC	PT-51G45U / PT-46G40U	The television turns off intermittently and none of the functions using the panel buttons or the remote control work. When unplugged and plugged in again, the device works for a while longer.	Resolder potentiometers r1933 and r1908 on board b. The potentiometer must be removed from the PCI and all glue on the PCI must be cleaned using a hot soldering iron, as the shutdown occurs due to glue conduction.
PANASONIC	TC14C6/TC20C6/TC14C7/TC20C7	Firstly, the vertical one is partially closed, and after the technical staff adjusts the vertical height, the device's on screen appears shifted downwards, being cut off at the bottom of the screen. When this defect occurs, the voltages at pin 5 of IC1101 and pin 5 of IC401 go to low level (the device is switched to 50Hz).	Replacement of capacitor c1160.
PANASONIC	TC-14C7 E TC-20C7	On Philips and JVC video cassettes with the video output in the NTSC (pure) system, the color does not reproduce correctly (the color is flickering).	Remove the 1.5m resistor r605.
PANASONIC	TC-29S10	Changes on the power supply board phenomenon: burnout of resistor r872 caused by fluctuations in mains voltage. (The TV screen may have a smaller image).	1- change resistor r872 to 2.7. to 1.5. 2- change the capacitor c884 from 220ƒÊf/16v to 10ƒÊf/16v
PANASONIC	TC1420C6, TC1420C7 E TC1420C21	Loses tune after a few seconds.	Check capacitor c151 according to the code termination of ic601, as below: ic601 code. an5192k-a / c151 = 10nf cod. an5192k-b / c151 = 3.3nf depending on the termination of the ic601 code (a or b), the capacitors must be changed as described above.
PANASONIC	TC29S10	On some devices, every time we change the channel, the characters chk appear on the screen after the channel number disappears.	In these devices there was an insertion failure in the production line. modification: please check the presence of resistor r1073, and if it is absent, insert it.
PANASONIC	TC20A7/TC14A7	Sound distortion.	Change capacitor c2304 from 10nf to 47nf
PANASONIC	TC-29S10	At first there is a reduction in the picture, after some time on the television it turns off and does not turn on again.	In places where the current is very low or there are many devices connected to the same socket, the resistor r872 burns and subsequently the capacitor c878 leaks from the power supply. Countermeasure: 1) change the value of the c880 capacitor from 10µf to 1µf. 2) place a diode in parallel with the capacitor c878.
PANASONIC	TC-14C7 / TC-14C21 / TC-20C7 / TC-20C21	Loss of color on channel 6 on mx3-r chassis (in some locations)	There is a loss of color only on channel 6, which in certain locations causes: some video signals originating from local broadcasters have a delayed burst signal, meaning that the BGP (burst gate pulse) cannot identify it. Countermeasure: 1) change to the pal-m board (vep03d36a) a) remove the 2,200pf capacitor from position c823 and place a 3,900pf x 50v polyester capacitor. b) remove the 1,200pf capacitor from position c824 and place a 2,200pf x 50v polyester capacitor (use the capacitor removed from position c823). c) add a 27kΩ 5% 1/4w resistor in parallel with r834, fixing it to the board with an insulating material. or replace the 12kΩ resistor with an 8.2kΩ 5% 1/4w resistor. 2) change in the main board (main pcb - vep06b35c for nv-sd450br, vep06b35q for nv-sd465br, vep06b35n for nv-sd665br). Remove the 4.7uf capacitor from position c3038 and place a 1.0uf x 50v electrolytic capacitor.
PANASONIC	TC-29V50B	Device without sound	Burning of the ic2302 (volume, bass and treble control) the burning of the ic2302 is probably caused by electrostatics. solution: place a ma1150 or bzx79c15t77 zener diode in parallel with the c1166 capacitor, under the board, to protect the ic2302. note:. In every television model tc-29v50b that passes through an authorized workshop for repair, the ma1150 or bzx79c15t77 diode must be installed as a preventive measure, even if it does not have an audio defect.
PANASONIC	TC-29V50B	Cold solder on resistor r-841 burns out of ic802(str), d184, c812, q804	In the first production batches, the r841 resistor was mounted very close to the heatsink, which will cause cold soldering and oxidation on its terminals due to heat dissipation. as this resistor is located between the drive and the base of the power transistor, this bad contact will cause the ic802(str), d814, c812, q804 to burn. solution: 1) after the burnt components are replaced, the resistor r841 must be removed, checking that its value has not changed, and if it has, it must be replaced. If its value is ok, its terminals must be sanded and re-soldered in its position on the board. 2) please take this countermeasure for all devices that pass through the authorized workshop for maintenance, whether or not the device presents problems at the power supply.
PANASONIC	TV 29 V50B	Dead	Resistor r 833 (22Ω) with altered resistance
PANASONIC	TC 29AV1	Dead	Resistor r 820 ( 15Ω ) aberto