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Document revision 2.1 – Last modification : 12/11/17
CP5176 Assembly guide – Gain reduction meter
1.
LEDs
For each one of the 16 LED's cut the short leg (cathode)
at 5mm from body and cut the long leg (anode) at 6mm.
Then insert the first green LED on the PCB, long leg (anode) on top. Make sure that
the leg is perfectly parallel to the pad. Solder the anode but leave the cathode free
for now. The position is still easy to adjust until both legs are soldered.
Insert and solder the next LED and repeat until the16 LEDs are in position.
Make a last visual check and correct LED's that are not perfectly lined up, then
solder the cathodes on the PCB back side.
2.
Strap
Solder the strap indicated in red on the layout schematic. Use a resistor
lead that was cut previously.
3.
Resistors
Add R1 to R20.
Control the resistor values with a digital multimeter. Bend the leads at 0.4” with a lead forming tool.
4. Integrated Circuits
Insert U1, U2, U3 and U4 and solder. You will need to bend the pins slightly inwards before inserting.
Warning
: Make sure to respect the IC direction, marked by a semi-circular notch on the IC and a dot on
the PCB.
5. Regulator IC's
Add U5 and U6. The IC's are installed flat on the PCB in order to minimize the components height.
Warning
: Watch out the IC direction.
6. Ceramic capacitor
Add C3. This capacitor is also installed flat on the PCB.
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