Service manuals, schematics, eproms for electrical technicians
PANAVOX 20LAC
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196.0byte
196.0byte
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Category
TV
EPROM
TV
EPROM
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PANAVOX 20LAC 20 LAC
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Dear Expert
The details of my TV is as follows
1. Philips 40PFL4707/F7 Manufactured March 2012
2. SMPS Board BA21P6F01 01 1
3. SMPS board has a sticker that says A21P6MPW C 7219720
4. This is a 110v Mains Supply TV sold in USA
5. I imported this from USA into my country where we have 230V.
6. I have a simple winding transformer that converts 230v to 110v
The TV has been having this problem. Here are the steps
1. Mains power on
2. Front panel white led blinks 6 times
3. Philips logo display
4. TV shuts down immediately
5. Nothing happens. If i press power button on TV or remote nothing happens
6. Have to power off and then wait for few minutes to experience same repetition.
Last two days, tried several times, only once the TV started and after 10 minutes it did auto shutdown as there was no input signal connected.
Does this indicate issues with SMPS or main cpu board ? Even if its faulty, how did it start once ?
More testing done as follows
1. Removed all connectors. Cleaned all three pcb with liquid cleaner. Cleaned all connectors externally and internally ( holes) using painting brush. Allowed everything to dry.
2. Reconnected
3. Started. This time, went past the Philips logo. I could connect a macbook via HDMI and play youtube videos on the TV for ~1 hours.
4. Using remote, entered service mode and initialized ( factory reset) the TV
5. For 1 hours of proper run, measured voltages. LED+24v was showing properly at 24v, AL+3.3v was at proper 3.3v and the P-ON-H1 was properly at 3.3v
6. After about 1 hrs, the screen shut down. The LED+24v is showing at 6v, AL+3.3v at 3.3v and P-ON-H1 is a 0v. This indicates the main cpu board has turned off the P-ON-H1 signal.
7. Power off, wait for 2 min. Power on... same philips logo and TV shuts down. Problem repeats.
8. Firmware is Code TVNB010_00_PF_XX91_BA PIC code U10_CM08:_40A_C7W_R_02. Did a google search and found no references if this firmware needs any upgrade.
requesting experts next steps to root cause the issue. I suspect the main board is bad and the SMPS is good. What if I manually put a wire from AL+3.3v to P-ON-H1 ? will the TV be on or is it risky for the main cpu board ?
I am attaching the service manual for this TV
The details of my TV is as follows
1. Philips 40PFL4707/F7 Manufactured March 2012
2. SMPS Board BA21P6F01 01 1
3. SMPS board has a sticker that says A21P6MPW C 7219720
4. This is a 110v Mains Supply TV sold in USA
5. I imported this from USA into my country where we have 230V.
6. I have a simple winding transformer that converts 230v to 110v
The TV has been having this problem. Here are the steps
1. Mains power on
2. Front panel white led blinks 6 times
3. Philips logo display
4. TV shuts down immediately
5. Nothing happens. If i press power button on TV or remote nothing happens
6. Have to power off and then wait for few minutes to experience same repetition.
Last two days, tried several times, only once the TV started and after 10 minutes it did auto shutdown as there was no input signal connected.
Does this indicate issues with SMPS or main cpu board ? Even if its faulty, how did it start once ?
More testing done as follows
1. Removed all connectors. Cleaned all three pcb with liquid cleaner. Cleaned all connectors externally and internally ( holes) using painting brush. Allowed everything to dry.
2. Reconnected
3. Started. This time, went past the Philips logo. I could connect a macbook via HDMI and play youtube videos on the TV for ~1 hours.
4. Using remote, entered service mode and initialized ( factory reset) the TV
5. For 1 hours of proper run, measured voltages. LED+24v was showing properly at 24v, AL+3.3v was at proper 3.3v and the P-ON-H1 was properly at 3.3v
6. After about 1 hrs, the screen shut down. The LED+24v is showing at 6v, AL+3.3v at 3.3v and P-ON-H1 is a 0v. This indicates the main cpu board has turned off the P-ON-H1 signal.
7. Power off, wait for 2 min. Power on... same philips logo and TV shuts down. Problem repeats.
8. Firmware is Code TVNB010_00_PF_XX91_BA PIC code U10_CM08:_40A_C7W_R_02. Did a google search and found no references if this firmware needs any upgrade.
requesting experts next steps to root cause the issue. I suspect the main board is bad and the SMPS is good. What if I manually put a wire from AL+3.3v to P-ON-H1 ? will the TV be on or is it risky for the main cpu board ?
I am attaching the service manual for this TV
Üdv Kollegák !
Tegnap hozták a fenti gépet,mindkét hangszóró zárlatossá leégve, hangvégfok ic (tda 7269)szintén.
Cseréltem ic-t illetve a 2db kicsatoló kondit és természetesen a 2 hangszórót. Most jó és éppen járatom.Érdekes, hogy a (félig)döglött végfokból és a leégett hangszórókból (1-2ohm) viszonylag erős "szirénahang" szerű zúgás hallatszott. A végfok ic egyik kimenetén de a kicsatoló kondi előtt teljes tápfesz kint volt, a másik kimenetén az odaillő féltápfesz. Talán valami gerjedés lehetett rajta. Most javitva, a végfok hűtőbordája még langyosnak sem mondható. Érdeklelne a véleményetek.
Köszönettel: Csinti
UDVOZLOM A CSAPATOT !
Elado egy samsung tv 100 Euroert - hibaja: mukodes kozben neha ki es be kapcsol.Ennek a javitasahoz kernem a segitsegeteket.
http://elektro.bazar.sk/4532471-samsung-lcd
Sziasztok!
A szomszédnak bedöglött a tv-je még garos lenne, de nem találja a számlát.
Szétszedtem, már nem garos.
A hibajelenség:
Nem indul, a háttér világítás bekapcsol, majd újra ki, folyamatosan mint ha zárlatot érzékelne a táp.
Ha a kijelzőről lehúzok egy csatit a háttérfény folyamatos lesz.
Működés közben visszateszem a szalagkábelt rendben működik,kép is van egészen addig még ki nem kapcsolom.
Következő bekapcsnál kezdődik minden előről.
Lehet,hogy az egy éves tv-ben már megadta magát a táp?
Üdv:
A szomszédnak bedöglött a tv-je még garos lenne, de nem találja a számlát.
Szétszedtem, már nem garos.
A hibajelenség:
Nem indul, a háttér világítás bekapcsol, majd újra ki, folyamatosan mint ha zárlatot érzékelne a táp.
Ha a kijelzőről lehúzok egy csatit a háttérfény folyamatos lesz.
Működés közben visszateszem a szalagkábelt rendben működik,kép is van egészen addig még ki nem kapcsolom.
Következő bekapcsnál kezdődik minden előről.
Lehet,hogy az egy éves tv-ben már megadta magát a táp?
Üdv:
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