ok, a picture will not do this justice, but a verbal description from a halfway decent tech should do it
while looking in the bottom of the chassis, on it's transformer end upright. That puts the faceplate pointing left and the on-off switch down low to the table.
we have:
chassis ground b, a punched tab right above (to the left actually) the b+ terminal of the amp board
chassis ground a, a punched tab between the main cap and the amp board - and the cap is not grounded to it there.
chassis ground c, a soldered point right below (to the right actually) the b+ terminal of the amp board
signal ground for the pre-out / amp in plugs
next - the board pins by their own labels, left to right, component side, pin row facing viewer:
----------------------------
edge of board
out 1
--- short gap, then group of three
e3
e1
in 1
--- long gap until center
+b
--- long gap from center to group of three
in 2
e2
e4
--- short gap,
out 2
edge of board
and here is how they are connected:
out 1 long orange wire to speaker selector switch
e3 black wire to chassis ground a
e1 black wire to chassis ground a
e1 also has ground wire of yellow jacketed shielded cable to signal ground
in 1 white wire center conductor of yellow jacketed shielded cable to amp in left
+b brown wire to main capacitor plus terminal
+b also has 0.01uf cap to chassis ground c
in 2 green hook up wire 2" to amp in right
e2 black wire to chassis ground b
e2 also black hookup wire to signal ground
e4 black wire to chassis ground a
out 2 long white wire to speaker selector switch
hope that's clear enough
while looking in the bottom of the chassis, on it's transformer end upright. That puts the faceplate pointing left and the on-off switch down low to the table.
we have:
chassis ground b, a punched tab right above (to the left actually) the b+ terminal of the amp board
chassis ground a, a punched tab between the main cap and the amp board - and the cap is not grounded to it there.
chassis ground c, a soldered point right below (to the right actually) the b+ terminal of the amp board
signal ground for the pre-out / amp in plugs
next - the board pins by their own labels, left to right, component side, pin row facing viewer:
----------------------------
edge of board
out 1
--- short gap, then group of three
e3
e1
in 1
--- long gap until center
+b
--- long gap from center to group of three
in 2
e2
e4
--- short gap,
out 2
edge of board
and here is how they are connected:
out 1 long orange wire to speaker selector switch
e3 black wire to chassis ground a
e1 black wire to chassis ground a
e1 also has ground wire of yellow jacketed shielded cable to signal ground
in 1 white wire center conductor of yellow jacketed shielded cable to amp in left
+b brown wire to main capacitor plus terminal
+b also has 0.01uf cap to chassis ground c
in 2 green hook up wire 2" to amp in right
e2 black wire to chassis ground b
e2 also black hookup wire to signal ground
e4 black wire to chassis ground a
out 2 long white wire to speaker selector switch
hope that's clear enough
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