sanyo dp42740

[fixerupper75]

Hello guys, I have this sanyo set. the green light turns on for @ 3 sec.
I've read the service manual that Tom66 has tag to another thread. My question is what is the resistance when it is shorted to ground. (high or low)

Resistance check so far:

P35 pin 1 = 1 M ohm

P25 pin 5 = 4.4 K ohms

SN20 pin 30 = 4.4 K ohms

SS23 pin 1 = 7 M ohms

[fixerupper75]

Re: sanyo dp42740

any help out there

[tw2005]

Re: sanyo dp42740

Hello guys, I have this sanyo set. the green light turns on for @ 3 sec.
I've read the service manual that Tom66 has tag to another thread. My question is what is the resistance when it is shorted to ground. (high or low)

Resistance check so far:

P35 pin 1 = 1 M ohm

P25 pin 5 = 4.4 K ohms

SN20 pin 30 = 4.4 K ohms

SS23 pin 1 = 7 M ohms

none of those are short. short is essentially zero ohms or close to it but then depending on what is being checked hundreds of ohms could indicate part of the circuit shorted.

this being a panasonic based panel, the most common problem is with the SS board going short at ss11 or the rjp30e4 transistors on that board short. but being a Sanyo mainboard could be a mainboard issue too.

SN board could fail too

searching this model, there have been reports of that led on for 3 secs then out. not sure what the fix is

[fixerupper75]

Re: sanyo dp42740

Is there anyway to find the orginal boards for this set. Looks like someone replaced the sn board and I don't know if it is the right one.

[fixerupper75]

Re: sanyo dp42740

Let's revisit this tv. Ok, I've out that the audio 13v is missing. Traced it back to the ic6630
voltage reg. 3.3 on the right leg and 1.8 on the big tab on top and .5 on the left left.

[fixerupper75]

Re: sanyo dp42740

any suggestions?

[fixerupper75]

Re: sanyo dp42740

Does anyone have the service manual for Sanyo DP42740-02? I'm trying the schematic for the 13v audio.

[vbrad511]

Re: sanyo dp42740

https://www.badcaps.net/forum/showthread.php?t=50623