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INamp V1.4 - ASSEMBLY GUIDE Rev. Jun 2019

FRONT PANEL COMPONENTS MOUNTING TIPS:

Now we will proceed to mount the jacks, potentiometers and LED. This part of the assembly is CRITICAL. 
Please take your time and read the following instructions carefully.

These components must NEVER be soldered until they are placed on the PCB and fully attached to the 
front panel.

There are two reasons for this:

The height of the panel components are not all the same. Because of this, if not attached properly 
before soldering, they will not stay properly seated against the panel. This might cause mechanical
stress, reducing their life expectancy and in the worst case cause them to break.

The second reason is that it is very difficult to align the components to the holes if the panel is not
positioned before soldering. In the case of the LEDs, they are almost impossible to set to the 
correct height without reference to the front panel.

The procedure we will follow will be:

Placing mechanicals to both control boards.

Place these boards to front panel.

Place the jacks in main board, then assemble main board to both control ones, making sure they 
are flat and parallel. Then screw the jacks and solder.

So let's go for it! Remember all these steps will be performed 

on both control boards.

LED

Place the LED onto control PCBs (at silkscreen side) minding its polarity, but 

don't solder it

 until the 

front panel is in place. This is the only way to solder it in the right position.

Negative is  the square pad marked at silkscreen with a – symbol. 

Qty

Type

Name on PCB

1

LED

LED

OPEN CONTROL BOARD BAG B

 

MINIJACKS

Place all the mini-jacks onto the PCBS ensuring they are placed over the silkscreen markings, and sitting 
on the PCB flat,  but 

don't solder them yet

POTENTIOMETERS

Now place potentiometers on the PCB over the silkscreen markings (same side as LED) 
Do not put it all the way down, leave it loose so it will be easy to make it flat against the PCB. Place 
washer first so it will stay under the panel... 

Don't solder them

.

Qty Type

Name on PCB

1

Single 

GAIN

4

Summary of Contents for INamp

Page 1: ...main board and two control ones Control boards are identical so you will need to follow the instructions twice GOOD LUCK MAIN PCB OPEN MAIN BOARD BAG A RESISTORS Qty Value Code Name on PCB 2 100k Brown Black Black Orange Brown R2 R8 3 1k Brown Black Black Brown Brown R4 R9 R10 2 10k Brown Black Black Red Brown R1 R7 2 220k Red Red Black Orange Brown R3 R6 FERRITE Solder the two ferrite beads by us...

Page 2: ...ide for help identifying capacitors http www wikihow com Read a Capacitor Qty Value Code Name on PCB 6 100n 104 C2 C3 C7 C8 C9 C12 2 47p 47 C6 C10 2 220n 220n C5 C11 ELECTROLYTIC CAPACITORS3 Values are written on the side of the capacitor Mind their polarity The long leg of the capacitor is the positive Qty Value Code Name on PCB 2 10uf 10uf C1 C4 MALE PIN HEADERS Place and solder the Male Pin Hea...

Page 3: ...104 1 22k Red Red Black Red Brown R106 TRANSISTOR Be sure they are orientated correctly The curved and flat sides of the silkscreen outline of the transistor on the PCB must match that of the transistor s body Qty Value Name on PCB 1 2n3904 Q100 FEMALE PIN HEADER Place the female pin headers at the position JP100 and solder Good job You just finished to solder components to the boards and are abou...

Page 4: ...el The procedure we will follow will be Placing mechanicals to both control boards Place these boards to front panel Place the jacks in main board then assemble main board to both control ones making sure they are flat and parallel Then screw the jacks and solder So let s go for it Remember all these steps will be performed on both control boards LED Place the LED onto control PCBs at silkscreen s...

Page 5: ...acks B Pots Make sure all of the above parts are flush with the panel then solder them Next adjust the LED so that it is flush with the panel and solder it 6 5mm JACKS and final assembly Place both jacks onto main PCB ensuring they are placed over the silkscreen markings but don t solder yet Attach main board to control boards Jacks are fitting tight but with care they will fit perfectly Then scre...

Page 6: ...ads between C11 and R10 at main board Cut the trace connecting upper and middle pad and solder central and bottom one Bridge C11 with a resistor leg or wire With these changes second channel 6 5 Jack will be linked with the output Give it a try Both Inamp channels are made around two inverting amplifier stages The value for the resistor can be changed to have a different response Take a look to Wi...

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