| Make | Model | Problem | Solution | Date |
| | | |
| Found: 19
|
| Hitachi | A7 | Dead - overvolts Zener PGK180 s/c | Check dry joints HT pot RV950, R950 68k, R952 8k2 & opto IC901 Pt no T548013 -see write up from Dave Hewitt | 14-09-04 |
| Hitachi | A7 C24W1TN | Trips | Does it trip with A1 volts at min/max? If not, check Nicam chip is fully home in its holder | 14-09-04 |
| Hitachi | A7 series | Field collapse or cramp | Check IC601 & if R616 68k is fitted, if not connect across ZD603 - helps prevent crt flashover damage | 14-09-04 |
| Hitachi | A7 series | Int reverts to st/by - due to high HT of 175v (135v) | Check for dry joints (often invisible) on Set HT pot VR950 | 14-09-04 |
| Hitachi | A7 series | Short pic | Check value of R602 or 603 (1R - 2R2), they can increase in value slightly | 14-09-04 |
| Hitachi | C2886TN A7 | Pic takes long time to appear | Change R896,R897 & R898 from 150R TO 220R & set A1 to 147v at green Tr cath | 14-09-04 |
| Hitachi | C2886TN A7 | Sound - int crackle | Resolder caps around sound o/p IC - build up of residue on legs | 14-09-04 |
| Hitachi | C2886TN A7 | St/by only but LED dim as though working (TDA8375 version) | DJ on the ground link which is located between small caps C528, C529 near the 2 X-tals X501, X502. The DJ was on the component side of the PCB. | 14-09-04 |
| Hitachi | C2886TN A7 | When changing LOPTxs | Pay attention to type of replacement transformer; if not identical you may need to change links (see Serge) | 14-09-04 |
| Hitachi | C28W1TN A7 | Excess height - unable to enter serv mode | Can be altered using EEPROM programmer - address 171H is the location | 14-09-04 |
|
|
| Hitachi | C28W1TN A7 | Service mode entering | Set to Chan 44 & press "Status" button(I or +) then mute & TV | 14-09-04 |
| Hitachi | C32W510SN A7 | Cuts out int | Check earth links & reg heatsinks for dry joints | 14-09-04 |
| Hitachi | C32W510SN A7 | Field faulty - jittery & lines below centre - tappable | Dry joints R602 & 3 connected to pin 5 IC601 (under glue & a plastic strut) | 14-09-04 |
| Hitachi | C32WD2TN2 A7 | Tripping | Check R807/8/9 on crt for burn up - if so CRT is duff (Philips) & crt base reqs replacement pt no A527110 | 14-09-04 |
| Philips | MD1.1A 29PT886A/79R | Dead with burning smell | Cap 2428 330nF 250v conn arcing | 14-09-04 |
| Rowa | 71RA 7102 | Relay won't kick in | C516 47µ | 14-09-04 |
| Samsung | CW30A75S | St/by only with LED flashing | R423 overheats - DZ302 33v zener & IC301 TDA8351 | 14-09-04 |
| Watson | FA7039 11AK19 | Dead with LOPTr s/c | HT at 170v on dummy load - R823 130k hi at 170k | 14-09-04 |
| Watson | FA7039 11AK19 | Width excessive & no E/W adj | L602 loading coil to left of LOPTx dry jointed legs - remove & scrape clean | 14-09-04 |