Dicas Reparação SONY




Modelo - Chassis


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SonyBE4 KV14T1U
Deadcracks in print around loptx
SonyBE-4 KV14T1U
deadLOPTr Q802 S2055N s/c, R615 0.46R (121737100) o/c, IC601 STRS5706 s/c
SonyBE-4 KV14T1U
coloured lines on topEEPROM IC002 ST24C02CB1 (875937032)
SonyBE4 KV14T1U
Dead - no led lit or flashing0.47R resistor from the 300volts input to the chopper TX was O/C, replace STRS5706 chopper chip, still dead - LOPTr S2055N leaky If LOPTx is grey, R806 1.5R with a 1.8R resistor Part number 1-216-352-11.
SonyBE4 KV14T1U
Auto grey scale lines visible at top of screenEPROM ST24C02CB1 IC002 faulty
SonyBE4 Chassis
Int trips off - led flashing 6 times Blue screen momentarily at sw off - int s/c in crt
SonyBE4
Txt can't be selected - nothing happens when you tryEnter service mode, and at the "TT" prompt type "18". This will turn teletext on or off depending on how it was originally set. Sets which do not feature teletext or have the wrong version of IC001 fitted will only display P100 when teletext is selected.
SonyBE4
Reverts to st/by at sw on with 6 flashes from LEDover-current protection circuit (Q600, 602) is operating, usuallyprobs in LOP. To identify the cause, first dis FOP chip (IC501). If set switches on with frame collapse, replace IC501. If set fails to switch on, dis HT feed to LOPTx. This should give 4 flashes of st/by LED (no horizontal fly-back) showing that problem is in LOP. Check LOP comps before condemning LOPTx. If st/by LED continues to flash 6 times even with LOPTx disd, check R620 (270K) & R622 (470K) in over-current protection cct.
SonyBE4
Pic displaced down by 2cmVolts on Q500 & 501 way out - Jungle chip MC44007P faulty
SonyBE4
No txt or OSDR081 o/c, C810 also failed
SonyBE4
Field collapseNo 24v supply to IC501 - R814 0R47 ¼w fusible o/c - improved type 1-249-443-11 introduced
SonyBE4
Dead - LED flashes 6 times then repeatsOver current problem - Loptx u/s
SonyBE4
Dead - LED blinks 6 times (Field fault)TDA9302H FOP chip dry jointed and u/s
SonyBE4
Dark picC823 0µ022 250v leaky in beam lim cct
SonyBE-3E KV32FX20U
sound crackling, "NICAM" appears on screenreplace X201 18.432MHz on A PCB (176062811)


Assistência TécnicaAs dicas apresentadas destinam-se a técnicos de eletrónica, a tentativa de reparação ou assistência sem ter conhecimentos de eletricidade e eletrónica, podem provocar danos mais graves aos equipamentos e, devido a tensões muito elevadas em alguns circuitos, graves danos fisicos que podem constituir um risco em determinadas reparações.

Não arrisque reparar equipamentos com tensões elevadas se não tiver conhecimentos técnicos para o fazer em segurança.

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