Dicas Reparação SHARP
Modelo - Chassis
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| Marca | Modelo (Chassis) | Sintoma | Causa | Solução | Por: |
|---|---|---|---|---|---|
| Sharp | CA1 51DT25H | dead | no volts to micro, replace Q704 (RHTX0130BMZZ) | ||
| Sharp | CA1 51DT25H | dead | C713 , D710 (RHDX0577BMZZ) and Q701 S2055N | ||
| Sharp | CA1 37ET35H | no remote and faint humbar on pic moving upwards, manual ch. change Ok | C706 68uF 400V | ||
| Sharp | CA1 37ET35H | dead | R705 560k o/c | ||
| Sharp | CA1 37DT25H | low contract, poor sync, no text | SMD Q801 (part no VS2SC2412KQ1) leaky (video driver to pin 24 jungle IC201) | ||
| Sharp | CA1 37DT25H | frame foldover at the top | C502 100uF 35V | ||
| Sharp | CA1 37DT25H | blows LOPTr withing 1 min | C604 220uF 16V on -10V rail | ||
| Sharp | CA1 37DM23H | audio buzzing | connection between positions A1 and A2 on main PCB not made during production, connect with a lead | ||
| Sharp | CA1 | Replacing TDA884x/N1 with N2 | TDA884x versions 1Y and 2Y are not interchangeable. Version 1Y is now obsolete. So if you use 2Y instead of 1Y make the following changes: 1. remove L205 (IF-VCO coil pin 13-14) 2. change R407 from 68R to 47R (SCART video out) 3. change R802 from 220R to 150R (Video in) 4. change R204 from 1M to 4.7M (pin 15 - Vcc) 5. write to EEPROM address 0C value 40 | ||
| Sharp | C3720H 14A | St/by only after brief green LED | R521 3R9 in 24v supply o/c - next to LOPTx | ||
| Sharp | C3720H 14A | Reverts to st/by at sw on | 122v HT to LOP but no line drive; R521 3R9 fusible res in FOP 24v supply o/c - check D502 | ||
| Sharp | C3720H | Weak blue drive | D807 on small sub panel connected to crt base leaky (use 1N4148 in lieu) & TDA3566 dec chip | ||
| Sharp | C3720H | Tuning drift | IC1003 - used ZTK33 | ||
| Sharp | C3720H | Striations on picture & 'black fingers' | Lopt o/c pins 6 to 7. Can be replaced with HR7675. Short out Pin 8 to pin 5, then wrap the flying loose wire around the lopt 1 extra turn then fit in pins 11 & 12 reverse them if you get loud whistling ! | ||
| Sharp | C3720H | St/by only - EHT briefly at sw on | No supply to FOP stage - D502 & R521 in 24v supply faulty |