Make | Model | Problem | Solution | Date |
| | | |
Found: 3443
|
Akai | CT20K2PA | Dark pic - increasing sub brill resulted in field coll | R436 120k o/c | 14-09-04 |
Akai | CT2107MS (Onwa) | Int off with blob in centre of screen | Check for hairline cracks around chopper tfmr pins | 14-09-04 |
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Akai | CT2159 Onwa | Field faulty - int lines at top etc | C417 220mfd 16v, C423 2200mfd 25v, C435 470mfd 16v | 14-09-04 |
Akai | CT2159UT Onwa | No start up | C910 & C912 47µ | 14-09-04 |
Akai | Various | To enter service mode | Press Mute, OK, TV in sequence | 14-09-04 |
Akura | Baby 10 | Brightness - no control | D409 o/c | 14-09-04 |
Akura | Baby 10 | Dead - list of psu 2 faults | Fault 1: Dry joints on IC402, also check 12V socket.
Fault 2: Line output transistor is dry jointed (emitter).
Fault 3: Check if fuse holder 5AT is loose.
Fault 4: Replace D410 in line stage with two RGP30 in parallel.
Fault 5: Check regulator block for dry joints.
Fault 6: Check D410 (FR604) in the line output stage. | 14-09-04 |
Akura | Baby 10 | Dead - list of psu faults | Fault 1: Check output of regulator IC402. S/C in DC jack may blow the 5A/T fuse. Note: IC402 can cause other faults, such as oversized picture with bent verticals.
Fault 2: Check L110 for dry joint.
Fault 3: [No 12V at regulator]. Check R402 (1R/0.5W) for O/C.
Fault 4: Check line drive transformer (TX EM103) for dry joints.
Fault 5: Check print between output and destination of (potted) regulator for O/C.
Fault 6: Check line output transistor for broken print.
Fault 7: Check fuse F402 and diode D402, damage due to incorrect connection of battery.
Fault 8: Replace IC402. Check EEprom chip IC601 (MN1220).
Fault 9: Check regulator IC401 (L7812).
Fault 10: Check the DC input sockets for high resistance.
Fault 11: [5A fuse blown]. Check D412 FR155 diode for S/C a BY299 will do.
Fault 12: [Regulator OK]. Check line drive transformer for dry joints.
Fault 13: Check mains transformer for O/C.
Fault 14: [630mA fuse by switch O/C]. Check bridge rectifier for S/C. Use 1N5401 as replacement.
Fault 15: Check IC402, F401 (630mA) fuse and D403, D405 in the bridge rectifier circuit.
Fault 16: [F401 blown]. Check D404.
Fault 17: [No PSU start up]. Check resistors R301 (330K) and R302 (330K).
Fault 18: Check 12V DC-IN socket. | 14-09-04 |
Akura | CX10 (Baby 10) | Int dead | Dry joints inside discrete type reg module | 14-09-04 |
Akura | CX35 Nicam | No sound | Replace Eeprom | 14-09-04 |
Alba | 4859 11AK19 | No line drive at sw on (150v HT to LOPTr) | Dis'd D814/815 (+14 & -14v audio o/p ic supply diodes). Replacing TDA2615 aud o/p chip resulted in bright white raster & flickering LED; R914 47R 200v feed to IC901 TDA6107Q on crt base o/c & IC s/c | 14-09-04 |
Alba | CTV3409 11AK20S | LED stays green (pic ok) | Q803 BC547 st/by sw tr leaky | 14-09-04 |
Alba | CTV4808 11AK19 | Comes on in st/by then if button pressed blinks pale green | Check R914 47R safety res & TDA6108JK | 14-09-04 |
Alba | CTV4808 11AK19E3 | No tuning but tuning bar moves | Q501 BF240 - BC548C works in this position | 14-09-04 |
Alba | CTV4851 11AK19 | Dead - no LED display | R806 22k o/c | 14-09-04 |
Alba | CTV4851 11AK19B-1 | Dead with 0nly 300v pri HT | Opto coupler faulty - though more faults may be present (esp if it went off in a thunderstorm) | 14-09-04 |
Alba | CTV4855 (Onwa) | Low sound | C202 220µ decoupling cap AND R421 0R68 in line stage hi res (1R5) | 14-09-04 |
Alba | CTV4855 Onwa | No sound/pic - blank raster | 5v line low at 3.6v - Q619 o/c | 14-09-04 |
Alba | CTV4859 11AK10-17 | Dead | Q801 (BUZ77B), R809 (0.47R), IC801 (TDA4605-3), C817 (1µF 63v), R805 (330k 0.5w), D808 (BA159). | 14-09-04 |
Alba | CTV6682 11AK12 | green flyback lines can be seen on the picture, otherwise is Okish | no green output from TDA8362A(2Y), the IC is u/s - caused by intermittently arcing LOPTx (HR6465). | 14-09-04 |
Alba | CTV840 Onwa | Black vert bars with background pic | C420 22µ 160v o/c | 14-09-04 |
Alba | CTV840 Onwa | No tuning although the set displayed tuning drive | R125 ( 47R ) was opencircuit because C127 ( 470uF 16V ) was short circuit .These components form a filter in the 9.25V supply | 14-09-04 |
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Alba | CTV841 Onwa | St/by only - relay chatters when sw held in | D401 | 14-09-04 |
Alba | CTV841 Onwa | No pic - appears bright when A1 advanced | R430 180k in beam lim o/c | 14-09-04 |
Alba | Onwa CTV701 | No sound/pic just pattern on screen | Video reaching Txt pcb but not leaving it. 5v supply missing - check HT smoothing cap 100µ 160v | 14-09-04 |
Alba | Ssangyong ETC. C | DEAD ZD401 12v ZENER SC R414 12R 2W OC LOP TR SC | CHECK HT SHOULD BE 114v CHECK ALL POWER SUPPLY CAPACITORS , ZENERS AND SOLDERING | 14-09-04 |
Amstrad | 3121N 11AK12 | St/by only - psu o/ps present except 12 & 8v | IC301 (CTV352/V1.4) and IC302 (ST24C02AB1). | 14-09-04 |
Amstrad | CTV1410 Onwa | Dead with HT low at 50v (112v) | No st/by relay, R632 33k pin 36 IC603 o/c | 14-09-04 |
Amstrad | CTV1410 Onwa | Sw itself back on when in st/by - int | Flexing panel brought fault on - R920 & R302 were physically touching bypassing relay | 14-09-04 |
Amstrad | CTV1410Onwa | Field cramp atbottom | R408 18k o/c | 14-09-04 |