| Marca | Modelo (Chassis) | Sintoma | Causa | Solução | Por: |
|---|---|---|---|---|---|
| Panasonic | TX21S3T | Whistle only | Dist line drive wfrm - Pin 9 IC601 only 3.7v (8v); D861 1SS133T-77 hi res | ||
| Panasonic | TX21S3T | Service mode entering | select chanel 60 set sharpness to minimum press timer on remote at the same time as the down arrow on the front of the set - press store after each adj to store | ||
| Panasonic | TX21S3T | No sound - ok thro scart I/p | No o/p from IC601 - chip faulty | ||
| Panasonic | TX21S3T | NEGATIVE PICTURE WITH AGC OVERLOAD ON TUNER PICTURES OK FROM SCART | REPLACE EEPROM (STORE PREVIOUS DATA VALUES AND THEN ENTER INTO NEW CHIP | ||
| Panasonic | TX21S3T | Lack of height | Adj in service mode | ||
| Panasonic | TX21S3T | Dead & buzzing | D861 faulty - checks ok out of cct | ||
| Panasonic | TX21S3T | Dead - no HT to IC601 | Check D861 for o/c | ||
| Panasonic | TX21S1T/BH | To tune press "F" button on front of set | Until "tuning" shows - then pres "^" key. You can enter Chan no. by prefixing with "C". Then select pos with chan up/down keys & press "S" to store. Exit by pressing "F" key | ||
| Panasonic | TX21S1T | Brightness increases over time causing trip | LOPTx had faulty A1 sect | ||
| Panasonic | TX21MD3 | Tripping slowly | Line Driver Transformer (T501, pt no.5270103200) s/c | ||
| Panasonic | TX21MD3 | Blank screen with small white dashes. OSD, Txt & sound ok | IC601 (VDP3108APPA1) | ||
| Panasonic | TX21MD1, TX21AD2, TX25MD1, TX28LD1, TX25AD1, TX25AD1DP, TX29AD1, TX29AD1DP | Black & white vert lines - replace VDP3108 | Orig IC601 nla - use kit TZS9EK002-2, which includes EEPROM with nec software changes to use VDP3108APPA1 | ||
| Panasonic | TX21MD1 Euro2 | Int sw to st/by on bright scenes | Change EAROM IC1203 X24C0803AF and the matching updated EPROM IC1202 27C010-800SA. If you do not change the EPROM there is an afc problem with the picture constantly wavering about and the set will not lock onto channels in the tuning mode. | ||
| Panasonic | TX21MD1 | Tuning int when disturbance tested | 2 x 82R sm res in the tuner, in line with pins 3 & 5 of IC type MT02B. You will find that any or all of the 4 connections to these resistors are dry jointed. | ||
| Panasonic | TX21MD1 | Snowy effect on bright parts of pic only | BIG chip IC601 VDP3108A |