Final Sanity Checks; Prepare To Reconnect Your Pat-4 To Your Music System; Appendix 1: The Toothpick Trick - DYNACO PAT-4 Assembly Manual

Final Sanity Checks

Here are a few last tests before you reconnect your PAT-4 to your music system. With
the top still off, plug in the AC mains. Turn on the power switch. Set your meter to DC
volts. Connect one lead of the meter to ground.
Be careful! These steps are performed with the power connected and
The voltage on eyelet 8 of both preamp PCB's should measure between
-17 and -18 Volts DC (with respect to ground).
The voltage on eyelet 4 of both preamp PCB's should measure between
17 and 18 volts DC (with respect to ground).
The voltage on eyelet 12 of both preamp PCB's should measure
between 36 and 40 volts DC (with respect to ground).

Prepare to Reconnect your PAT-4 to your Music System

 Turn off the power.
 Remove the AC plug from the wall socket.
 Replace the cover.
 Reinstall the four screws that hold the cover in place.
 Reinstall the PAT-4 to your music system.
 Notes:
o Use the PHONO LOW input for your turntable. The other two PHONO
inputs, PHONO HIGH and PHONO CER are disconnected.
o If you chose the three phono wiring, then:
 The TAPE HEAD input will also be equalized for a turntable, so it
 The SPECIAL input will also be equalized for a turntable, so it
o If you chose the 5 high level and one phono wiring, then:
 The TAPE HEAD input is a high level input
 The SPECIAL input is a high level input

Appendix 1: The Toothpick Trick

This appendix describes an easy way to clear the solder from a hole in the PCB. It can
also be used to clear the solder from terminals on pots or jacks. Doing so makes it easier
to install a new component, or reinstall wires that were temporarily removed to allow
access to some other component.
All you'll need is a soldering iron and some toothpicks with sharp points. The diameter of
the pointed part of the toothpick must be smaller than the diameter of the hole that you're
trying to clear.
Heat the solder land on the component side of the board until the solder flows. Insert the
toothpick from the component side of the board while pushing and twisting the toothpick.
If the solder has melted, the toothpick should push through the board, displacing the
turned on!
could be used as an input for a second turntable
could be used as an input for a third turntable
Page 17 of 23
Done Done
 
 
 
 