| Make | Model | Problem | Solution | Date |
| | | |
| Found: 355
|
| JVC | AV25TS2EK | Crackling on sound at sw on until warm | SAWF SF012 - fit improved type CE42606-T01 | 14-09-04 |
| JVC | AV25VM1 | St/by only | IC951 KIA7808P 8v reg also replaced Q953 2SA966 & Q954 2PC1815 | 14-09-04 |
| JVC | AV25VM1 JA | Blank raster with fb lines & top cramping | FOP IC TDA8350 | 14-09-04 |
| JVC | AV25VM1EK | Field to & bottom cramp | IC401 Field/EW chip TDA8350Q | 14-09-04 |
| JVC | AV25VM1EK | St/by only & no line drive | TDA8366 jungle chip IC101 pin 35 8v supply missing as IC951 8v reg faulty KIA7808PI | 14-09-04 |
| JVC | AV28F1EG | Flyback lines at top of pic | Dry joints FOP chip | 14-09-04 |
| JVC | AV28F1EG | Int line sync/ col/pic break up from cold | Blanket solder signals board | 14-09-04 |
| JVC | AV28F1EK | INT LOSS OF SOUND AND PICTURE | AGC PRESET INT OC | 14-09-04 |
| JVC | AV28F1EK | NO NICAM LED | D102 DRY ( GREEN LED ) | 14-09-04 |
| JVC | AV28F1EK | NO SOUND | ICP ON AUDIO SUB - PCB ( CHECK 12V ON R911 ) | 14-09-04 |
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| JVC | AV28F1EK | Pic/sound int disappears to blank raster | AGC preset dry jointed | 14-09-04 |
| JVC | AV28F1EK JX | Int reverts to st/by | check for dry joints on regs IC521/522 | 14-09-04 |
| 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 | 14-09-04 |
| JVC | AV28S1EK | Hour Glass effect | Replace both memory chips | 14-09-04 |
| 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) | 14-09-04 |
| JVC | AV28S1EK AV25S1EK MX2 | Width & E-W faulty | Replaced memory chip for electronic screwdriver - 24C01A/P IC1707 | 14-09-04 |
| JVC | AV28S4EK | Field collapse | change micro MN15245. Waveform on pin 25 too low amplitude | 14-09-04 |
| JVC | AV28SD4EK | Brief burst of power then dead | LOPTx | 14-09-04 |
| JVC | AV28SD4EK | Dead, R526 burnt out C468/469 exploded | Replaced D521 BY228, D523 BYW95B R526, 39R D525 27v zener . | 14-09-04 |
| 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 | 14-09-04 |
| JVC | AV28SD4EK | Shuts down aft few secs | EEPROM faulty | 14-09-04 |
| 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: | 14-09-04 |
| JVC | AV28WFR1EK JK | Narrow raster then turns off | C521 Flyback tunning cap o/c
Can also cause failure of Q543 D521 Q521 Q545 Q544 | 14-09-04 |
| JVC | AV28WFR1EK JK | Width reduced & int trip | C521 3.5nF 1.5kv line tuning cap - JVC replacement better quality | 14-09-04 |
| 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 | 14-09-04 |
| 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. | 14-09-04 |
| 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. | 14-09-04 |
| JVC | AV28WR2EK JF | Dead | CP953 N50 prot o/c, D965 BYD33D-T3 s/c in psu | 14-09-04 |
| 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 | 14-09-04 |
| 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 | 14-09-04 |