| Make | Model | Problem | Solution | Date |
| | | |
| Found: 355
|
| JVC | AV25S1EK | Dim pic with green tint | No volts at IC201 contrast control pin as C1206 3µ3 leaky | 14-09-04 |
| JVC | AV25S1EK | Field collapse | TDA3654 FOP chip | 14-09-04 |
| JVC | AV25S1EK | FRAME COLLAPSE | REPLACE FRAME IC TDA3654 | 14-09-04 |
| JVC | AV25S1EK | LED COMES ON AND THEN GOES RED THEN OFF | CHECK FOR S/C E/W STAGE R526, C458 AND D521 39 OHM, 4.7MFD50V AND BY228 | 14-09-04 |
| JVC | AV25S1EK | Led goes red, then green then off at sw on - no start | R526 39R, C458 4µ7 50v & D521 BY228 in E/W cct | 14-09-04 |
| JVC | AV25S1EK | NO LINE DRIVE | R903 2.2k BASE BIAS TO Q902 SLIGHTLY HIGH | 14-09-04 |
| JVC | AV25S1EK | Shuts down at sw on | D521 BY228 s/c, C468 47µ, R526 0R22? | 14-09-04 |
| JVC | AV25S1EK | Shuts down immediately after sw on | D521 BY228 s/c, C468 47µ , R526 0R2 | 14-09-04 |
| JVC | AV25S1EK Mk2 | Always comes on in st/by - sometimes at full vol | EEPROM IC104 corrupt - pt no CAT93C66P | 14-09-04 |
| JVC | AV25S1EK MXII | Unstable pic with line jitter | Video o/p from IF module has ragged sync pulses - 1µ elect cap in AGC feed | 14-09-04 |
|
|
| JVC | AV25S2EK | No start up after initial EHT rush - reverts to st/by | EEPROM corrupt - remove EEPROM to test (should then come on with snowy screen) Pt no CAT93C66P & prog with R/C pt no RM871E | 14-09-04 |
| JVC | AV25S2EK | SWITCHES ON , EHT RISES THEN GOES TO STANBY | POSSIBLE CORRUPT EEPROM, REMOVE AND SET SHOULD SWITCH ON | 14-09-04 |
| JVC | AV25S4EK | No sound/piv via tuner - ok via scart | 4Mhz Xtal in tuner can | 14-09-04 |
| JVC | AV25S4EK | No VSM option & may come on in AV mode | Before you change the IC, go into Service mode (press Display and VSM Standard keys on the remote). Go through all of the deflection settings and write down the values (don't forget to record 16:9 mode as well as 4:3) as you will need to program these into the new EEPROM. When in Service mode, press Display and VSM Standard keys again and the screen will show "System Constant". This determines which facilities the set has (text, surround sound, etc.) You should also record these and program them into the new IC | 14-09-04 |
| JVC | AV25SD4EK | Burring noise for first 20 mins | C409 100µ 65v on Dolby PCB | 14-09-04 |
| JVC | AV25SX1EK | Field - top cramp | TDA8350Q chip faulty | 14-09-04 |
| JVC | AV25SX1EK | Int Field collapse with it turning off | Dry joints around FOP | 14-09-04 |
| JVC | AV25SX1EK | No sound | IC952 5v supply to Dolby pcb low, check for o/c L601 N10 ccct prot. Dis A mute pin 8 IC601 to restore sound. Fault could be due to micro or eeprom caused by crt flashover | 14-09-04 |
| JVC | AV25SX1EK | No sound | IC1952 KIA7805PI 5v reg | 14-09-04 |
| JVC | AV25SX1EK | shuts down almost straight after sw on | HT correct but EHT high due to C1521 3,800pf 1.5kv reduced cap | 14-09-04 |
| JVC | AV25SX1EK JA | Flickering & flashing pic | FOP chip | 14-09-04 |
| JVC | AV25SX1EK JA | Flickering/flashing pic | FOP chip replacement seems to have cured it | 14-09-04 |
| JVC | AV25SX1EK JA | Int pic blanking out | TDA8350Q vertical output chip (IC401). If R971 if fitted & overheating, remove it (should not be fitted in UK models) | 14-09-04 |
| JVC | AV25SX2EK | NO SOUND | REPLACE S/C C613 100MFD25V | 14-09-04 |
| JVC | AV25SX2EK | No sound - pic ok | R617 overheats due to C613 100µ 25v s/c (no 5v suppl) | 14-09-04 |
| JVC | AV25SX2EK | Pic comes on for 5 secs at sw on then off | X ray prot active due to D582 BZV85C6V8 s/c causing Q573 base to rise | 14-09-04 |
| JVC | AV25SX2EK | PICTURE FLUCTUATES ON AND OFF | CHECK D582 FOR S/C (6.8V ZENER) | 14-09-04 |
| JVC | AV25SX2EK | Small pic | C521 3000pF 1.6kv "S" corr cap changed value | 14-09-04 |
| JVC | AV25SX2EK | SMALL PICTURE WITH NO DISTORTION | REPLACE C521 3000PFD16KV | 14-09-04 |
| JVC | AV25SXEK JH | Small pic then reverts to st/by | Line tuning cap C521 (4n 1.5kV for 29" sets (part QFZ0152-4001) or 3n6 1.8kV for 25" (part QFZ0122-362)). | 14-09-04 |