Service manuals, schematics, eproms for electrical technicians

PHILIPS 21GR2750

TV - EPROM
Type: (RAR)
Size
307.0byte
Page
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Category
TV
EPROM
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    PHILIPS 21GR2750 21 GR 2750
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Relevant TV forum topics:
Philips ctv2800 11ak19e3 Tv tápegység probléma ( MEGOLDVA)
Sziasztok! A címbéli szerkezettel gyűjt meg a bajom. Barátomé a készülék. Elmondása szerint villámos volt. Se kép se hanggal indult a javítás. A tápban a stby stab icje kuka volt, táp ic csere. Most ott tart a dolog hogy stby-ban világít a pirosan a led de cincog a táp és el szeretne égni az R831. Ha rajzom jó akkor ez egy 22ohmos ellenállás. P+ szal indítva a led zöldre vált nem füstöl az R831 viszont pulzálnak a feszek. Az izzó is villog amit a sortranyó helyére kötöttem. Optót és tl431-et cseréltem már. Ha valakinek van ötlete kérem a segítségét. Üdv :Gábor
Philips LED 42PFL6907H
Hello Everybody,

I got this TV led philips and I am searching schematic for the power supply.
As of today I don't have led power on.
I got 3.3v On the connector to SSB and that's it

If you have an idea , thanks for your help

BJ
https://www.cjoint.com/c/IAoowgS4BYQ
https://www.cjoint.com/c/IAooxUQJCsQ
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Philips 40PFL7007K/12 does not power on - Chassis QFU1.1E LA
Hi everybody, I have Philips 40PFL7007K/12 on repair. TV does not start up. I have checked the PSU and it seams to be OK. There seam to be problem on the main board. What I have tried… Well, there is +3V3-STANDBY coming from PSU to main board. This feeds up the main processor. This voltage has also been used to switch TV on. I have checked that switching signal from POWER ON button goes back to main board. But I did not check this whole path towards the processor as it is BGA package and it is covered by ceramic cooling plate. And here comes what is not clear to me. 1. How to check if the main processor works? Does it work on the +3V3-STANDBY when TV is is standby mode? 2. Can I somehow check if the PSU is working? May be by activating some pin? 3. I have noticed by measuring (ohm-meter) some capacitors on the main board (in circles on the picture) that there is very low resistance on them (4.5ohms). In the scheme it is shown that these capacitors are on the 1V5 (1.5V) line. Is this OK? Basically it does not give much current as I = 1V5 / 4R5 = 333mAmps. What do you think? Certainly there are low voltage data parts (RAM. Processor …) connected and such resistivity might be correct….?.... What I have also find that this 1V5 is split into 1V5M0 and 1V5M1. See the picture. I have removed the coils and measured resistance. Then 1V5M0 shows about 15ohms and 1V5M1 shows about 6,5ohms. The service manual is on this link: http://elektrotanya.com/philips_ch.qfu1.1e_la.pdf/download.html Thanks Martin
Philips 42PF7320/10 táp nem indul
Sziasztok! A következő problémával fordulok hozzátok: A címben szereplő TV-nek meghalt az 5V a tápban (13-as hibakód az ellenőrző panel alapján) A tápon a 3.3V os részen volt egy púposkondi, amit a szomszédjaival együtt lecseréltem (volt még két db 2200u/10V). Ugyanakkor újraforrasztottam az összes lábat, a biztik okésak, lecseréltem az egyik LM2576-ot is, de hiába. A gond az, hogy csak nem múkodik, ugyanaz a hiba, a többi feszültség megjelenik, de 2mp múlva lekapcsol a védelem. Sajnos a 42PF7320 SM mind a 3 v 4 verziójából hiányzik a tápegység rajza, amit kaptam, az a LJ44-00101C rajza, ami az én tápom is, de semmi szám, alkatrész nem talál, ráadásul hiányos. Ha van valakinek egy komplett kapcs. rajza a tápról, nagyon boldoggá tenne! U.I - van egy kollégának egy LJ44-00092C tápja, mennyire kompatibilis ezzel?
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