| Marca | Modelo (Chassis) | Sintoma | Causa | Solução | Por: |
|---|---|---|---|---|---|
| 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 | ||
| JVC | AV25S4EK | No sound/piv via tuner - ok via scart | 4Mhz Xtal in tuner can | ||
| JVC | AV25S2EK | SWITCHES ON , EHT RISES THEN GOES TO STANBY | POSSIBLE CORRUPT EEPROM, REMOVE AND SET SHOULD SWITCH ON | ||
| 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 | ||
| JVC | AV25S1EK MXII | Unstable pic with line jitter | Video o/p from IF module has ragged sync pulses - 1µ elect cap in AGC feed | ||
| JVC | AV25S1EK Mk2 | Always comes on in st/by - sometimes at full vol | EEPROM IC104 corrupt - pt no CAT93C66P | ||
| JVC | AV25S1EK | Shuts down immediately after sw on | D521 BY228 s/c, C468 47µ , R526 0R2 | ||
| JVC | AV25S1EK | Shuts down at sw on | D521 BY228 s/c, C468 47µ, R526 0R22? | ||
| JVC | AV25S1EK | NO LINE DRIVE | R903 2.2k BASE BIAS TO Q902 SLIGHTLY HIGH | ||
| 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 | ||
| 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 | ||
| JVC | AV25S1EK | FRAME COLLAPSE | REPLACE FRAME IC TDA3654 | ||
| JVC | AV25S1EK | Field collapse | TDA3654 FOP chip | ||
| JVC | AV25S1EK | Dim pic with green tint | No volts at IC201 contrast control pin as C1206 3µ3 leaky | ||
| JVC | AV25S1EK | DIM PIC | C1206 LEAKY 3.3mfd |