DYNACO PAT-4 Instrukcja montażu - Strona 14

Przeglądaj online lub pobierz pdf Instrukcja montażu dla Wzmacniacz DYNACO PAT-4. DYNACO PAT-4 16 stron. Power supply
Również dla DYNACO PAT-4: Instrukcja montażu (20 strony)

Drukuj stronę

Final Test and Assembly

Inspect your work:

1. Make sure that all the new wires are soldered in place.

2. Make sure that there are no solder bridges

Your PAT-4 should still be disconnected from your music system and it should still be

unplugged from the wall outlet.

Carefully plug in the PAT-4 to the wall outlet, taking special care to avoid contact with

the high voltage (either 120 V or 240 Volt) wiring inside the PAT-4. Turn on the power

switch, and give the power supply voltages a few seconds to settle. There is a slow turn-

on built-in to the power supply to avoid clicks and pops upon turn-on. Set your meter to

DCV and measure the following voltages with respect to the ground terminals on the

power supply board:

1. 38V should be between 37 and 39 Volts

2. P17P5 should be between 17 and 18 Volts

3. N17P5, although not used at this point, should be between -17 and -18 volts

Figure 5-New Power Supply Installed in PAT-4 (this PAT-4 has tone control defeat switch)

If the voltages check out in the previous step, then:

1. Remove the AC plug from the wall outlet.

2. Wait one minute to allow the caps to discharge.

3. Put the top back on, and re-install the four screws that hold it in place.

4. Reinstall the PAT-4 to your music system.

The PAT-4 doesn't use negative 17.5 volts, yet! There should be no wires connected to either N17P5 or

its associated grounds.

Page 14 of 16