Page 13 of 23
Final Wiring and Reassembly
These Steps Are Important!
Done
Done
You’ll see that the PEC 555005 attaches to a number of pins around the
phono inputs. Cut lead 3 of PEC 555005 near where it attaches to the
center conductor of the RCA jack labeled “Phono Low”, leaving the
lead as long as possible. Bend the lead out of the way, and tape it if
necessary to keep it from shorting anything. Repeat this for both the left
and right channel PEC’s. Don’t cut the wire that goes to the selector
switch! It must remain in place.
Using the wire labels to guide you, reconnect the rest of the wires to the
front preamp PCB, with the exception of eyelets 6, 7 and 8.
Run a wire from eyelet 8 of the left-channel board to one of the
negative 17.5 volt outputs (N17P5) of the PAT4PWR board.
Using the wire labels to guide you, reconnect the rest of the wires to the
back preamp PCB, with the exception of eyelets 6, 7 and 8.
Run a wire from eyelet 8 of the right-channel board to the other of the
negative 17.5 volt outputs (N17P5) of the PAT4PWR board.
If you want 5 high level inputs and 1 phono input
Perform the modifications in this section ONLY if you want 5 high level inputs and 1
phono input. After performing these modifications, TAPE HEAD and SPECIAL will
both accept normal high level inputs.
If you want to have the capability for three phono inputs (using the phono, tape head, and
special inputs), then skip this section.
Ground Changes Done
Desolder the ground wire from FRONT PC-16, eyelet 2. Cover the bare
portion with electrical tape, but leave it connected to the switch.
Desolder the ground wire from REAR PC-16, eyelet 2. Cover the bare
portion with electrical tape but leave it connected to the switch.
Remove the following ground wires at the rear panel:
a. Short Lug 2-3 to Short Lug 4-5
b. Short Lug 13-14 to Short Lug 15-16
Add the following ground wires at the rear panel:
a. Short Lug 4-5 to Short Lug 6-7
b. Short Lug 15-16 to Short Lug 17-18
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