Sharp LC-60SQ15U TV DPS-167CP - No power

[dskall]

Re: Sharp LC-60SQ15U TV DPS-167CP - No power

If all components off of pin5 are good. May have bad ic.

[romasik]

Re: Sharp LC-60SQ15U TV DPS-167CP - No power

Check pin 5 diode, resistor and cap.

i check, all ok

[dskall]

Re: Sharp LC-60SQ15U TV DPS-167CP - No power

Check pin 5 diode, resistor and cap.

[romasik]

Re: Sharp LC-60SQ15U TV DPS-167CP - No power

CAP c2 (C7907) i change but nothing changed

[romasik]

Re: Sharp LC-60SQ15U TV DPS-167CP - No power

9.1 Startup Operation
Figure 9-1 shows the circuit around IC. Figure 9-2
shows the start up operation.
The IC incorporates the startup circuit. The circuit is
connected to D/ST pin. When D/ST pin voltage reaches
to Startup Circuit Operation Voltage VST(ON) = 38 V, the
startup circuit starts operation.
During the startup process, the constant current,
ISTARTUP = − 2.5 mA, charges C2 at VCC pin. When
VCC pin voltage increases to VCC(ON) = 15.3 V, the
control circuit starts operation

between 3rd and 8th leg 300V

[dskall]

Re: Sharp LC-60SQ15U TV DPS-167CP - No power

9.1 Startup Operation
Figure 9-1 shows the circuit around IC. Figure 9-2
shows the start up operation.
The IC incorporates the startup circuit. The circuit is
connected to D/ST pin. When D/ST pin voltage reaches
to Startup Circuit Operation Voltage VST(ON) = 38 V, the
startup circuit starts operation.
During the startup process, the constant current,
ISTARTUP = − 2.5 mA, charges C2 at VCC pin. When
VCC pin voltage increases to VCC(ON) = 15.3 V, the
control circuit starts operation

[nomoresonys]

Re: Sharp LC-60SQ15U TV DPS-167CP - No power

Hello, please help me i have same problem on my Sharp Aquos 60LC635E No 5V power, tv dead . Blown R7900 and short D7950 . I changed it, than blown R7900 again . D7950 ok. I change IC7903 and cap on 5 leg 50V 47u and R7900 never blown again but 5V not( I do not know what to do . On big two cap 315V, on 5 leg IC7903 9V this very low for start A6069H . Datasheet say min 13V.

Please Help me. board power supply dps-162KP B RUNTKA932WJQZ

The voltage isn't high enough, just like you said here, the question is why, I can't figure it out but one of the pros knows I bet.

[romasik]

Re: Sharp LC-60SQ15U TV DPS-167CP - No power

I see, ok check c7906, r7909, r7919, d7904.

everything is fine in my opinion

[romasik]

Re: Sharp LC-60SQ15U TV DPS-167CP - No power

use data sheet. Pin 7,8 are the startup voltage

[romasik]

Re: Sharp LC-60SQ15U TV DPS-167CP - No power

Use data sheet. Pin 7,8 are the startup voltage

Why??

[dskall]

Re: Sharp LC-60SQ15U TV DPS-167CP - No power

Where should the voltage come from on the 5th leg A6069H?

Use data sheet. Pin 7,8 are the startup voltage

[nomoresonys]

Re: Sharp LC-60SQ15U TV DPS-167CP - No power

Where should the voltage come from on the 5th leg A6069H?

is this the vcc voltage?

[nomoresonys]

Re: Sharp LC-60SQ15U TV DPS-167CP - No power

make sure the resistors are the correct value and not open.

[nomoresonys]

Re: Sharp LC-60SQ15U TV DPS-167CP - No power

I see, ok check c7906, r7909, r7919, d7904.

[romasik]

Re: Sharp LC-60SQ15U TV DPS-167CP - No power

looks like it comes from c7901.

no c7901 leg 8 .

Here is a very similar sheme

[nomoresonys]

Re: Sharp LC-60SQ15U TV DPS-167CP - No power

looks like it comes from c7901.

[romasik]

Re: Sharp LC-60SQ15U TV DPS-167CP - No power

Where should the voltage come from on the 5th leg A6069H?

[romasik]

Re: Sharp LC-60SQ15U TV DPS-167CP - No power

maybe check c7901, c7907, c7818, d7805.

I check, they seem to be ok

wonder if you received faulty IC7903 or if it has gotten damaged.

what do you mean? A6069H defective? was my marriage sold?

[nomoresonys]

Re: Sharp LC-60SQ15U TV DPS-167CP - No power

wonder if you received faulty IC7903 or if it has gotten damaged.

[nomoresonys]

Re: Sharp LC-60SQ15U TV DPS-167CP - No power

maybe check c7901, c7907, c7818, d7805.