jvc Repair Tips
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Results 369
Results 369
| Make | Model Ch. | Symptom | Problem Solution | Solution | By: |
|---|---|---|---|---|---|
| JVC | AV28WT4 | St/by only with ECO light flashing | B1 sec read s/c; E/W cct s/c due to D521, C470 & Q466 | ||
| JVC | AV28WR4EKS | Dead | Replaced s/c MC44604P chopper chip, CP953 blown, optocoupler TLP721FD4GR and the error amp SE-135N finally cured the problem (HT was rising above its correct 145v) | ||
| JVC | AV28WR4EK | Pic shifted to right in all modes - may be int | Loss of hor fback pulses to IC101 due to Q501 2SC1815 s/c | ||
| JVC | AV28WR4EK | Crackle on sound oc Sky dig via scart - ok on RF | Audio o/p of dig Rx set too high - enter system set up in Menu & adj/store vol in audio menu | ||
| JVC | AV28WR2EK JF | Dead | CP953 N50 prot o/c, D965 BYD33D-T3 s/c in psu | ||
| JVC | AV28WR2EK | To access service menu | Press the information "I" key and the mute key on the remote simultaneously.You then use the numbered keys to select the relevant submenu. Option 2 "V/C" is used to greyscale, for the cut offs and drives you use the numbered keys to alter the values eg. Red cut off, 4 to increase, 7 to decrease. Green cut off, 5 to increase, 8 to decrease. Blue cut off, 6 to increase, 9 to decrease etc. | ||
| JVC | AV28WR2EK | Service mode entering | press "i" & mute buttons together, select "2" for cut-off adjusts, correct setting with function +/- keys & store with menu button. | ||
| JVC | AV28WFT1EKS | Reverts to st/by aft pic appears with lack of width at sw on | C521 2nF 1.5kv tuning cap breakdown - pt no QFZ0196-202 | ||
| JVC | AV28WFR1EK JK | Width reduced & int trip | C521 3.5nF 1.5kv line tuning cap - JVC replacement better quality | ||
| JVC | AV28WFR1EK JK | Narrow raster then turns off | C521 Flyback tunning cap o/c Can also cause failure of Q543 D521 Q521 Q545 Q544 | ||
| JVC | AV28SD4EK MXIV | No sound and all programs show the same channel | Check the data lines on pins 14 and 13 of the connector CNO13 on the sound subboard. If they are low, disconnect the lines one by one from all the chips until the correct level is restored (about 4 V p-p). Also check IC001 5V regulator for DJs, as this could be the culprit. In this case all 3 chips on the sound board had leaky data line inputs: | ||
| JVC | AV28SD4EK | Shuts down aft few secs | EEPROM faulty | ||
| JVC | AV28SD4EK | Service mode entering | press "DISPLAY" and "VSN Standard" together & note settings While still in the service mode, press "Display" and "VSN Standard" again to enter the system constants menu. Now write down all the settings in the system constants menu. Press EXIT twice to return to the normal screen. Switch the set off and replace the EEPROMs with a new ones. Then go back to the service/system menu and enter all the data what you have written down. After all the items have been set, press "OK" to store.zbv | ||
| JVC | AV28SD4EK | Dead, R526 burnt out C468/469 exploded | Replaced D521 BY228, D523 BYW95B R526, 39R D525 27v zener . | ||
| JVC | AV28SD4EK | Brief burst of power then dead | LOPTx | ||
| JVC | AV28S4EK | Field collapse | change micro MN15245. Waveform on pin 25 too low amplitude | ||
| JVC | AV28S1EK AV25S1EK MX2 | Width & E-W faulty | Replaced memory chip for electronic screwdriver - 24C01A/P IC1707 | ||
| JVC | AV28S1EK AV25S1EK MX2 | St/by light changes col but no line drive | No supply to line dr tfmr as R903 2k2 hi res (switches st/by tr Q902) | ||
| JVC | AV28S1EK | Hour Glass effect | Replace both memory chips | ||
| JVC | AV28GS1EK | Electronic screwdriver | vsm >-< and the display button (the one above the menu botton left of the mute button) brought up the electronic screwdriver for height and vert posn |