ibanez pt999 repair help.

[inscho]

hey guys this is my first post on the forum...I'm not sure if this is even the right place to post this but I need a little help. this is my first attempt at a repair, so I'm going to try and describe this the best way I can.

I picked up a vintage ibanez pt999 off ebay and it was DOA. I traced the problem to the input jack. I ordered a switchcraft 112a jack to replace the old one. I wired it up the way it arrived, but its not working. there are 4 wires that were soldered to the input jack originally.

1)yellow wire that goes to the board.
2)black battery ground
3)grey wire that goes directly from the input jack to the output jack
4)black wire that goes to the board.

number 3 and 4 were soldered together...but at the moment I have everything soldered up except wire #4, and the signal passes through but there is no effect...when I put it on the lug that #3 is on it kills the signal. when I put it on the lug that #2 is on it makes a quick chriping sound, but still no effect. and when I put it on the lug with #1 it doesn't change anything.

here are a couple pictures...they are a bit blurry but maybe it will help..









help! 

[Barcode80]

there are 4 wires that were soldered to the input jack originally.

1)yellow wire that goes to the board.
2)black battery ground
3)grey wire that goes directly from the input jack to the output jack
4)black wire that goes to the board.

number 3 and 4 were soldered together...but at the moment I have everything soldered up except wire #4, and the signal passes through but there is no effect...when I put it on the lug that #3 is on it kills the signal. when I put it on the lug that #2 is on it makes a quick chriping sound, but still no effect. and when I put it on the lug with #1 it doesn't change anything.

from what i can tell, #4 is the circuit ground and #3 is the bridge ground between the jacks. they should be wired together so that the jacks can ground the circuit. the battery ground is soldered to that jack on that particular pin because this causes the circuit to only be grounded (and thus drawing current) when there is a cable insterted. this preserves battery life.

#1 is the effect input. check to make sure you also have a wire coming from the board to the output jack + lug. if there isn't one, that's your problem. if the signal died when you put #4 on #3, you have a circuit problem, and it could be as simple as this soluton. even if the output jack has the wire from the board intact, check the solder joints. good luck!