Bypass power switch

[kthorpe88]

Hello all,

I have a sanyo fw65d25t that I picked up from someone who knows how a screw driver works. He said the picture just would take longer and longer to come on and then one day it stopped. Well he tried to look at and managed to get the back cover off and wreck the power switch button.

So the indicator light comes on when its plugged in, I can't get it to turn on with a universal remote. He did say the back-light still worked just no picture. I'm wondering if their is a way to solder some jumper wires some place to turn it on with a switch?

Or do I have another issue? I did check all the caps and voltage regs. The voltage reg on the FRC board that is 1117a does not have conductivity to ground at all on any of the 3 pins? Nor does the top tab/pin.

[goontron]

Re: Bypass power switch

Unfortunately, no. jumping out the switch won't force it to turn on, the CPU needs a whole sequence of events to startup.

[dskall]

Re: Bypass power switch

Fixing the switch is not going to fix the problem. Since the switch was broken taking it apart to find out why it doesn't work.

Need voltages from connector that goes from power supply board to main board. Will need pin#- PIN DESCRIPTION -Pin voltage in standby-Pin voltage when pushing power button and picture of connector on power supply board.
Format:
Pin# - Pin Description - Pin Voltage standby - Pin voltage power on
1 - XXXXXXX - XXv - XXXv
2 - XXXXXXX - XXXv - XXXv
3 - XXXXXXX - XXXv - XXXv
4 - etc.

[Andrew F. Ali]

Re: Bypass power switch

If the switch is an open/close type switch, there will be two (2) contacts that can be permanently bridged to put the switch in the closed position. However. if it is a momentary type micro-switch, then NO you can't put a permanent bridge but can use a temporary bridge to momentarily close the switch to trigger the power ON mode.

[kthorpe88]

Re: Bypass power switch

Ok so in picture 1 is the IR&LED CON10 and the Key CN6. The pin voltages are as follows.

*PIC1
*CN10 goes to IR&LED board
L to R
3.2v, 3.2v
3.3v, 3.2v
GND
NC - 5.2v
5.2v, 5.2v

*CN6 Key
(Goes to power button asm that the other guy wrecked)
L to R
3.2v, 3.2v
3.3v, 3.2v
NC - 5.2v
5.2v, 5.2v

*Pic 2
*the first red connector (CN5 AMP PWR)
L to R
VR PWR, 12v
VR PWR, 12v
GND
GND

*Second red connector
L to R
55v
5.2v
GND

*Big white connector (CN2 Main PWR)
L to R
12v
GND
5.2v
5.2v
5.2v
5.2v
GND
GND
4.8v
5.2v

*Pic 3
*CN3
GND
GND
GND
GND
LVCC - 12v
HVCC - 55v?
HVCC - 55v?
HVCC - 55v?

*Pic 4
*CN4
GND
GND
V PWR - 12v
V PWR - 12v

*CN1
VR PWR - 12V
VR PWR - 12V
GND
GND
GND
5.2V - 5.2V
5.2V - 5.2V
VSTB - 5.2V
PWON - 4.8V
5.2V - 5.2V
5.2V - 5.2V
GND
GND

*PIC 6
Power supply

*PIC 7
Key/PWR button asm

Other pics are just of all the boards.

Hope this helps and gives some insight.