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Ingot MkII upgrade board installation instructions

***WARNING*** Hazardous voltages are located inside this power supply. Do NOT open the cover or work on this unit with the AC power connected or you could be killed. Even with the AC power unplugged failure to completely drain the storage capacitors can also lead to a shock. If you feel uncomfortable performing this work or if this procedure is beyond your skill set or abilities then you need to seek assistance from a professional. I take no responsibility for individuals electrocuting themselves due to a lack of understanding, you have been warned.

READ THIS DOCUMENT THOUGHOUGHLY. MAKE SURE YOU READ EACH STEP COMPLETELY BEFORE BEGINNING THE WORK ON THAT STEP. REMEMBER YOU ARE ULTIMATELY RESPONSIBLE FOR HOW THIS UPGRADE TURNS OUT. DON’T TAKE SHORT CUTS! JUST TAKE YOUR TIME AND DO IT RIGHT!

Begin by disconnecting your IPS or Ingot power supply from the AC wall outlet, but leave the XLR power cable plugged into your Aragon component. Wait until the green power LED on the Aragon component goes all the way dark and then wait an additional 2 – 3 minutes before disconnecting the XLR cable from the Aragon component. Now you have sufficiently discharged the storage capacitors in the power supply and it is safe to upgrade.

Verify one more time that the AC power is unplugged from the wall [you cannot be too safe here] then remove the cover from your Aragon power supply.

Using a phillips head screwdriver remove the 4 retaining bolts (Figure 1 arrows) for the old power supply board, then pull the board up and away from the housing.

[pic]

(Fig. 1)

Now remove the black and white AC wires (Figure 2). You have a choice in how you can disconnect the wiring from the old power supply board. If you are proficient at soldering you may desolder the wires and pull them free. If you are not good at soldering then you can use wire cutters and cut them loose, make sure you cut them right at the board to keep the wires as long as possible. Do NOT cut the green wire bolted to the chassis. This is the chassis AC ground and it remains connected to the chassis, so you may leave it connected during this procedure. It is possible that you may need to loosen the chassis ground nut and rotate the connector out of the way to clear the AC terminal connector on the Ingot MkII board. Don’t forget to retighten the chassis ground nut if you do loosen it.

[pic]

(Fig. 2)

On the XLR cable power connection you should make a note and take a picture of which color wires are going to which connections (Figure 3) on the board before removing those wires, i.e. + is green, - is black, etc. I have read of other owners saying that their DC wires were a different color, so it is up to YOU to keep track of which wire goes to which pin. You may once again either desolder the DC wires from the board or you may cut them as close to the old board as possible.

[pic]

(Fig. 3)

If you desoldered your wires in the previous steps then cut the ends of them back just past where the solder stops. This way you have fresh bare solder free wires to insert into the clamping terminals on the Ingot MkII. Now strip all of the wires back far enough that approximately 3/16” of fresh wiring is exposed and then twist the ends of the stripped wires to tighten up the strands and prepare them to be inserted into the terminal sockets of your Ingot MkII. Try not to leave more than 3/16” of bare wiring because it will be sticking out of the screw terminal connection and could possible cause a short circuit.

Now install your new Ingot MkII circuit board into the chassis in the same orientation as the old board (green 4 pin terminal facing the end the wiring comes in) and bolt it back down using the 4 screws removed in step #3.

The Ingot MkII was designed with Screw type terminal connections on both the AC voltage input (the 4 pin green connector) and on the DC voltage output (the angled 3 pin black connector).

The AC power is supplied to the 4 pin green input connector. The terminals for this connector are labeled 1, 2, 3, 4. This numbering is silk screened on the board between the transformer and the connector.

Connecting the wiring/jumpers for 120 VAC operation (skip forward to step 15 for 230 VAC connection)

For 120 VAC input power the black wire coming from the wall plug will be inserted into terminal 1 of the green 4 pin input connector. All 3/16” of the stripped wire should go into the terminal socket. If the ends of the wires are longer than 3/16” then the wire may bottom out too soon and all of the stripped end may not go into the socket, in this case trim some of the wire off and try again. Then tighten down the terminal 1 screw by turning the screw clockwise with a small flat head screw driver. Don’t go crazy tightening this screw down, get it decently tight, but be warned that over tightening can strip out the terminal screw. Once the screw is tight try tugging lightly on the black wire to see if you can pull it back out of the socket. It should not budge if you have it properly installed and tightened down. Before proceeding to the next step look closely using a bright light and ensure no stray strands of the wire are left sticking out of the terminal. If they are then remove the wire from the terminal and twist the end of the wire tight again and insert it back into terminal 1 and tighten it, then recheck. Strands left sticking out of the terminal block can short the power supply out and cause damage to the supply and possibly your Aragon component. This check should be performed after every AC and DC wire is installed into the terminal block.

Now move to pin 4 on the 4 pin green connector. You will connect the white incoming AC power wire to pin 4. Pin 4 also has a white jumper going to it from pin 2, the white incoming power wire and the white jumper must both be in pin 4 and tight once you tighten the screw. This makes it a little harder to get the AC wire inserted due to the fact both wires have to be in the terminal socket. Now check for stray wire strands outside of the terminal.

Pin 3 of the green AC incoming power connector should have a short black jumper running to it from the underside of the Ingot MkII board. Ensure that this wire is tight in the pin 3 terminal by tugging lightly on it.

Pin 2 of the green incoming AC power connector should have the white jumper that is also connected to pin 4 in it. Once again tug lightly on this white jumper and ensure that it is tight in Pin 2 of the green terminal block.

Once you are finished connecting the incoming AC power wires your Ingot MkII should look like the picture in Figure 4.

[pic]

(Fig. 4)

Connecting the wiring/jumpers for 230 VAC operation

If you are converting the Ingot MkII from 120 VAC to 230 VAC input power then the black jumper which runs from under the Ingot MkII board to pin 3 of the green 4 pin input connector is not needed. You can remove this wire from pin 3 and either cut it off flush with the Ingot MkII board (on the underside) or if you think you may eventually convert it back to 120 VAC then use a small wire nut on the end of the black wire to secure it (see figure 5). Make certain the wire nut is tight as AC line voltage is present on the end of this wire when the power supply is being powered. I’ve found it is best to fold the strands of wire back over the insulation and then screw the wire nut on to be able to tighten it up well. Once you are certain the wire nut is tight, then move it off to the side and proceed.

For 230 VAC input power the black wire coming from the wall plug will be inserted into terminal 1 of the green 4 pin input connector. All 3/16” of the stripped wire should go into the terminal socket. If the ends of the wires are longer than 3/16” then the wire may bottom out too soon and all of the stripped end may not go into the socket, in this case trim some of the wire off and try again. Then tighten down the terminal 1 screw by turning the screw clockwise with a small flat head screw driver. Don’t go crazy tightening this screw down, get it decently tight, but be warned that over tightening can strip out the terminal screw. Once the screw is tight try tugging lightly on the black wire to see if you can pull it back out of the socket. It should not budge if you have it properly installed and tightened down. Before proceeding to the next step look closely using a bright light and ensure no stray strands of the wire are left sticking out of the terminal. If they are then remove the wire from the terminal and twist the end of the wire tight again and insert it back into terminal 1 and tighten it, then recheck. Strands left sticking out of the terminal block can short the power supply out and cause damage to the supply and possibly your Aragon component. This check should be performed after every AC and DC wire is installed into the terminal block.

Now move to pin 4 on the 4 pin green connector. You will connect the white incoming AC power wire from the wall plug to pin 4. Once it is tightened down, tug lightly on the wire to verify it is tight in the terminal socket. Now check for stray wire strands outside of the terminal.

For 230 VAC operation pins 2 and 3 of the 4 pin green incoming AC power connector should have a white jumper connecting them. Once again tug lightly on this white jumper and ensure that it is tight in Pin 2 and Pin 3 of the green terminal block.

Once you have properly connected your Ingot MkII for 230 VAC operation the wiring should look like the picture shown in Figure 5.

[pic]

(Fig. 5)

Connecting your XLR cable to the Ingot MkII DC output connector

Now turn your attention to the black 3 pin angled DC output connector on the opposite end of the Ingot MkII power supply board (Figure 6). Notice the board near the output connector is silk screened with (+) (C) (-) designations.

[pic]

(Fig. 6)

Now remember the notes & pictures I asked you to take back in step 5, here is where you’ll use them if your wire colors/positions are different than those shown in figure 7. Take the wire that was removed from the (+) position on the old power supply board and insert it into the black 3 pin angled DC output connector with the same (+) label. Do the same for the wire from the terminal labeled (-) on the old board, inserting it into the matching terminal on the Ingot MkII. The remaining wire which went to the terminal labeled (8) will go the center terminal labeled (C) on the Ingot MkII. Remember to check each wire after tightening it in the terminal connector to ensure that no stray strands of wiring are loose. Also tug gently on each wire to ensure it is tight in the terminal connector.

[pic]

(Fig. 7)

Once you are through connecting the XLR cable you should verify that your DC wires are connected properly to the XLR connector. You can do this one of two ways, by a visual check or by using a DC meter to check the pins.

To perform the visual check take the XLR connector apart and check their positions. The rear cover of the XLR connector typically just spins CCW to loosen. Some of the XLR connectors I have seen from Mondial used a small screw to hold the cable cover in place. Once the cable cover is loose pull it away from the plug. The XLR connector has small numbers imprinted on the face of the plug, but you may need a flashlight and if your eyes are as bad as mine a magnifying glass to see them. The wire connected to the (+) terminal should be going to pin 1 on the XLR connector. The wire connected to the (-) terminal should be going to pin 2 on the XLR connector. Lastly the (C) terminal should be connected to pin 3. In the image shown in figure 8 the XLR connectors cable shield has been removed and the connector is being held as if it was being plugged into the back of the Aragon component with the XLR locking clip facing upwards. You can see that holding the XLR connector in this manner the wiring order matches the Ingot MkII output connector wiring order. Left is red (pin 1), lower center is white (pin 3), and right side is black (pin 2), once again with the XLR locking clip at the top

[pic]

(Fig. 8)

The visual check is a good check, but the best way to verify that the Ingot MkII XLR cable is wired properly is to use a volt meter and check the voltage at the XLR pins. This is done just before you hook it up to your Aragon component and we’ll cover that in a minute.

There is one other visual check you can do to verify the Ingot MkII unit is working properly. This involves checking the LED indicators in the center of the board. This step does however require that you leave the cover off of the power supply and plug it back into the AC power. If you are uncomfortable doing this with the cover off then just skip this step. To check these LED indicators, KEEP YOUR HANDS AND BODY CLEAR OF THE HOUSING and plug the unit into the wall AC outlet. You should see the two green LED’s brightly lit in the center of the board (Figure 9). If either of the LED’s is not illuminated unplug the power supply from the wall AC outlet and contact me for assistance.

[pic]

(Fig. 9)

Once you have verified that the power wiring is correct you may now reinstall the housing cover.

If you are checking the Ingot MkII power with a multimeter then proceed to step 28 before hooking the power supply up to your Aragon component. If you performed the visual check in step 23 and are not testing the DC power output with a multimeter then you may plug the XLR cable into your component and then plug the power supplies AC power connector into the wall AC outlet. You should see the green power indicator on your Aragon component illuminate. You are now through and ready to enjoy some music.

Once the cover has been reinstalled if you planned to use a multimeter to check the DC power to your Aragon component then you can do that now. Leave the XLR disconnected from the Aragon component and plug the power supply back into the AC outlet. If you set the multimeter for DC volts and put the black probe into the XLR pin 3 socket then with the red probe you should read approx. +24VDC at PIN 1 and approx. –24VDC at pin 2, these readings are +/- 1.5 volts. If you put the black probe into pin 2 and the red probe into pin 1 you should read approximately +50 VDC. If you read negative volts where there should have been positive then something is not right. You should unplug the AC power from your Ingot MkII and allow it to power down for a couple of minutes, remove the cover and perform the visual check listed in step 23.

Ingot MkII replacement fuses

For 120 VAC operation the Ingot MkII uses a 250 V, .75A slow blow, 2AG size

Mouser PN - 576-0229.750HXP

Digikey PN - F2467-ND

For 230 VAC operation the Ingot MkII uses a 250 V, .375A slow blow, 2AG size

Mouser PN - 576-0229.375HXP

Digikey PN - F2465-ND

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