philips 32pfl5507k/12

[StromarMiki]

Hi, for philips i need service manual.
I have problem with power supplay DPS-98EP A
I change fuse and TK13A65U. But not have voltage 12V only 3.3V.

[dick_barton]

Have a look at
https://english.electronica-pt.com/e...=32PFL5507K/12

[StromarMiki]

I already found it. i have ERROR CODES - LED BLINKING CODES.
4s pause and 3 fast flashing led blinking. I can't find this error.

[dskall]

Why do you need error codes if you know the problem?

[StromarMiki]

when connected to the power supply, red led blinking. (4s pause and 3 fast flashing led)
Voltage is only 3.3V.

[R_J]

Where is TK13A65U in the circuit? is it in the standby, pfc or main circuit?
Usually when a mosfet like this shorts it opens the source resistor and can damage the drive ic as well.

[StromarMiki]

Originally Posted by R_J

Where is TK13A65U in the circuit? is it in the standby, pfc or main circuit?
Usually when a mosfet like this shorts it opens the source resistor and can damage the drive ic as well.

i can't find it in the service manual.

[R_J]

The service manual does not have the dps-98ep schematic. That does look like the main mosfet that drives the main transformer. There is a resistor R611 0.24Ω (mosfet source) located beside that heatsink, check that it is not open, I expect that it is open. If R611 is open, check R610 as well, it connects the mosfet source to ic601'a CS pin.

[StromarMiki]

Originally Posted by R_J

The service manual does not have the dps-98ep schematic. That does look like the main mosfet that drives the main transformer. There is a resistor R611 0.24Ω (mosfet source) located beside that heatsink, check that it is not open, I expect that it is open. If R611 is open, check R610 as well, it connects the mosfet source to ic601'a CS pin.

I marked it wrong, TK13A65U is located on the second aluminum plate.

[R_J]

What is its board location number? that looks to be a Diode (D120)?
Do you have any voltage across C700A or C120A? (I'm not sure of the numbers).

If it was indeed a mosfet I suspect it is used to switch a voltage

[StromarMiki]

Originally Posted by R_J

What is its board location number? that looks to be a Diode (D120)?
Do you have any voltage across C700A or C120A? (I'm not sure of the numbers).

If it was indeed a mosfet I suspect it is used to switch a voltage

No voltage on c120 and mosfet.
The problem is on the primary of the transformer
IC 601 may not work. How can I check the operation of the transformer.

[R_J]

Originally Posted by StromarMiki

No voltage on c120 and mosfet.
The problem is on the primary of the transformer
IC 601 may not work. How can I check the operation of the transformer.

Check R611 0.24 resistor and see if it is open What is the number on Q601 AND IC601?

[StromarMiki]

Originally Posted by R_J

Check R611 0.24 resistor and see if it is open What is the number on Q601 AND IC601?

R611 is good-closed, Q601 is good, ic601 2QS02G

[R_J]

Do you have vcc voltage (20v) on pin7 of ic601? be careful not to short the ic pins. There is a resistor connected to pin7, check the voltage there instead of on the ic.

I suspect there is no vcc and the supply for the vcc comes from the standby circuit.

I am starting to think there is no power on signal from the main board. I suspect PC903 is the optocoupler that turns on the power supply
CN4 pin 2 standby should be the power supply on. With CN4 disconnected from the main board, connect pin 1 (3.3v) to pin 2 (standby) and see if you get your 12 volts.

[StromarMiki]

Originally Posted by R_J

Do you have vcc voltage (20v) on pin7 of ic601? be careful not to short the ic pins. There is a resistor connected to pin7, check the voltage there instead of on the ic.

I suspect there is no vcc and the supply for the vcc comes from the standby circuit.

I am starting to think there is no power on signal from the main board. I suspect PC903 is the optocoupler that turns on the power supply
CN4 pin 2 standby should be the power supply on. With CN4 disconnected from the main board, connect pin 1 (3.3v) to pin 2 (standby) and see if you get your 12 volts.

ic601 pin7 no VCC
CN4 PIN5 no VCC 12V
Power in pin2 is 3V mainboard is work.

[R_J]

Originally Posted by StromarMiki

ic601 pin7 no VCC
CN4 PIN5 no VCC 12V
Power in pin2 is 3V mainboard is work.

Does ic601 pin 7 connect to J17 and then to J9?
How do you know the main board is working and sending the power ON signal?

[StromarMiki]

Originally Posted by R_J

Does ic601 pin 7 connect to J17 and then to J9?
How do you know the main board is working and sending the power ON signal?

when connect CN4 on main board in pin 2 have 3v vcc.
and dont have 12v. I thinks is problem in power board.

[R_J]

Originally Posted by StromarMiki

when connect CN4 on main board in pin 2 have 3v vcc.
and dont have 12v. I thinks is problem in power board.

Does the voltage on pin2 change when you press the power button?
CN4 pin 1 is the standby 3.3 volts that supplies the main board, CN4 pin 2 turns the power supply on and off.

[StromarMiki]

Originally Posted by R_J

Does the voltage on pin2 change when you press the power button?
CN4 pin 1 is the standby 3.3 volts that supplies the main board, CN4 pin 2 turns the power supply on and off.

When I connect the power cable to 220v only red led blinking.
The main board works but reports an error.
4s pause and 3 fast flashing led blinking. I can't find this error.
Voltage failure is possible.

[R_J]

Originally Posted by StromarMiki

When I connect the power cable to 220v only red led blinking.
The main board works but reports an error.
4s pause and 3 fast flashing led blinking. I can't find this error.
Voltage failure is possible.

Here it is listed under layer 1