Make | Model | Problem | Solution | Date |
| | | |
Found: 10
|
Bush | 2714 | Dead with 2.5A mains fuse blown | Tr801 BU508A s/c, R801 2R2 5w o/c, R809 270k o/c, IC801 TDA4601 & therm TH802 CHS pt no 12001GT | 14-09-04 |
Bush | 2714 | Stuck in st/by | R603 3k9 5w HT feed to LOP o/c | 14-09-04 |
Bush | 2714 | Stuck in StBy - Psu ok | R603 3k9 5W oc ( line driver feed ) | 14-09-04 |
Ferguson | TX90 37140 | Corrugated verts | C189 22µ 50v between LOPTx & chan sel | 14-09-04 |
Hitachi | C1714T | Pic size decreases with brightness | HT low - CNX82A opto coupler IC901 s/c pri | 14-09-04 |
Hitachi | C1714T | St/by only | Dis supply to fop chip to check if this is cause - if then ok apart from field collapse, check fop chip TA8427k & D702 | 14-09-04 |
Hitachi | C1714T etc | Field o/p chip repeatedly fails | Replace ic 601. get two 33v Zener diodes and connect them in series ( BZX79C33V) connect the anode to pin 1 of ic601 cathode to pin 2 of ic 601. Fit 10nF 50v capacitor across the frame scan plug E701 on print side of the plug. If the ic still blows after this mod. a new CRT is required. The tube is flashing over. This applies to all sizes of 14T/TE range of sets | 14-09-04 |
Hitachi | C1714TE (A15 chassis) | No Txt & delay in returning to st/by | Check 5v supply pin 44 micro - if low ZD4001 5v1 zener is sus | 14-09-04 |
Hitachi | C1714TE (A15 chassis) | To acess service menu | press the following buttons on the remote:
4 4 STATUS MUTE TV in that order and fairly quickly. The service menu is displayed.
Check that BYTE 1 = 7D; BYTE 2 = 20 These are two hex digits - to exit menu press st/by | 14-09-04 |
Nokia | 7142 Euromono 2 | Flyback lines after fitting Konig FAT 30091 LOPTx | 1) adjust H sync 2) fit 1nF 5C40 3) remove 5C17 (12pF) & fit 22K res in 5C17's place | 14-09-04 |