HC1 Assembly Guide
Damaged or Missing Parts All kits and parts are checked before being shipped to you. If something arrives damaged or if your kit is missing a part, please open a support ticket to inquire about a replacement. Missing parts will be replaced at our expense. Damaged parts should be returned for verification. If the part shows signs of use beyond what was necessary to determine that it was damaged, DIY Recording Equipment, LLC reserves the right not to replace the part.
Table of contents
- Required Tools
- Optional Tools
- Component Sorting Sheet
- Bend Resistors
- Place Resistors
- Solder Resistors
- Trim Resistors
- Small Capacitors, Diodes, and ICs
- Populate Bypass Capacitors
- Populate Diode
- Populate LED
- Tape and Solder IC Sockets
- Place ICs in Sockets
- Inductor and Large Capacitors
- Populate Inductor
- Populate Large Capacitors
- Potentiometer and Jacks
- Populate Potentiometer
- Populate Jacks
- Final Checks and Testing
- Test Power
- Test Audio
- Help Us Improve
Required Tools top
We recommend an adjustable-temperature station, such as the Weller WLC100.
You can use 60/40 "leaded" solder or lead-free. We recommend 60/40 because it flows better and is easier for beginners to use.
You'll need a pair of good "snips" for cutting of the excess leads after soldering.
Phillips Head Screwdriver
A #1 Phillips head screwdriver.
Optional Tools top
If a problem needs solving, a multimeter can come in handy. You can also use it to sort resistors.
If you accidentally solder something in the wrong place, a desoldering pump can save the day.
Component Sorting Sheet top
To identify and keep track of every part in the kit, download and print the Component Sorting Sheet (PDF).
Bend Resistors top
Bend the resistor leads 90 degrees at the body so they can be inserted into the PCB.
R1, R4, R7, R10, RLED
4.7k resistor (x5)
2.2k resistor (x2)
1k resistor (x2)
R5, R6, R11, R12
1R resistor (x4)
Place Resistors top
Place the resistors into their respective positions on the PCB. As you place each resistor, bend its leads against the bottom of the PCB so that it stays in place during soldering.
Solder Resistors top
Solder the resistors to the PCB. Observe good soldering technique: heat the pad and lead for 2-3 seconds, apply a small bit of solder, and continue to heat the pad for another 2-3 seconds. The finished joints should be shiny and should have just enough solder to cover the pad entirely.
Trim Resistors top
Use clippers to trim away the excess leads. Clip as closely as possible to the joint without clipping the joint itself.
Small Capacitors, Diodes, and ICs top
Populate Bypass Capacitors top
Populate the yellow .1uF capacitors in the positions marked CB etc. These capacitors are known as “bypass capacitors,” hence the designator CB.
.1u ceramic cap (x4)
Populate Diode top
Place the diode so that the line on the component matches the line on the PCB. Double check the orientation, then solder and trim.
Populate LED top
Place the LED with the longer, positive lead in the "+" hole. Notice that the leads have a flat segment about 1/4" from the LED body. Insert the LED until the bottom of this flat segment, then bend it towards where the panel will be, solder it in place, and trim the leads.
Tape and Solder IC Sockets top
Insert the IC sockets so that the notches on the sockets align with the markings on the PCB. Secure in place with tape. Then flip the PCB over and solder in place. Remove the tape.
IC socket (x2)
Place ICs in Sockets top
The leads of the ICs must be slightly bent to fit perfectly into the sockets. For each IC, press one row of leads against a flat surface until they form a 90-degree angle with the body of the IC. Then do this for the other row.
IC polarity is indicated by a dot or notch on one side of the body. Align this side with the notch in the sockets. Place all of the ICs in this direction, and press them completely into the sockets.
NE5532 opamp (x2)
Inductor and Large Capacitors top
Populate Inductor top
Place the inductor, solder, and trim. Inductors are not polarized.
Populate Large Capacitors top
These capacitors are polarized, so they must be placed in a certain direction. The positive lead is slightly longer, while the negative lead is marked with a stripe on the body of the capacitor. Place the capacitors with the positive lead in the pad next to the "+" marking on the PCB. Double check their orientation, then solder and trim.
220u cap (x2)
100u cap (x2)
2200u cap (x4)
Potentiometer and Jacks top
Populate Potentiometer top
Place the potentiometer. Bend the two outer leads against the PCB, then solder and trim.
Populate Jacks top
Place the DC and audio jacks, solder, and trim the leads.
Final Checks and Testing top
Before you wrap up, check the following things:
Test Power top
Plug the external power supply into the wall and the HC1. If the LED on the front panel illuminates, the power is working. If it doesn't illuminate, most likely one of these parts is in backwards: C1, C2, C5, LED1.
Test Audio top
The HC1 accepts unbalanced inputs via either a single stereo cable in the L jack, or two mono cables in both the L and R jacks. Send audio to the HC1's inputs, turn the LEVEL control down completely (counter-clockwise), then plug in headphones. Gradually turn up LEVEL; if you hear the audio clearly in both headphones the HC1 is working correctly.
Help Us Improve top
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