powersoft DSP LITE User manual

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©2017 Powersoft
powersoft_DSPLITE_2incong_en_v1.1
DSP LITE
Two-Input Configuration

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INDEX
DSP Lite | 3
DSP-Lite Two-Input Configuration
The factory default hardware conguration features an XLR/TRS female input connector and an input-thru XLR male output (Figure 1).
This manual guides you through the steps to customise the DSP-Lite board for the two-input conguration (Figure 2).
The modication consists in replacing the male XLR with a female XLR/TRS connector, in addition to a few PCB adjustments.
(Figure 1 - One Input Configuration) (Figure 2 - Two Input Configuration)
(Figure 3 - Removing the Male XLR)
(Figure 4 - Removing the solder)
(Figure 5)
Required Tools:
• Soldering Iron (possibly Temperature Controlled)
• Desoldering pump/Desoldering gun
Procedure:
The rst step consists in desoldering the male XLR.
We suggest to use a desoldering gun but a good quality
temperature controlled soldering iron should do the job.
Perform this operation carefully, avoiding excessive heat or
mechanical stress in order to safeguard solder pads and through-
hole plating (Figure 3).
Remove solder from PCB holes with a desoldering pump or a
desoldering gun (Fig. 4).
Figure 5 portrays the end result.

INDEX
4 | DSP Lite
The next stage consists of removing SMD resistors: R7, R53,
R147, R148.
Locate the “LINK” marking on the PCB, close to the top-right
edge of the XLR silkscreen layout (Figure 6).
Use the soldering iron with some added solder to heat the four
pads simultaneously and remove the resistors (gure 7).
Don’t short the pads and take extra care to clean up any solder
excess.
Repeat the procedure to remove R147 and R148 (Figure 8).
(Figure 6 - R7 and R53 detail)
(Figure 7 - Removing R7 and R53)
(Figure 9 - Pads Location)
(Figure 10 - Shorted Pads)
(Figure 8 - R147 and R148 detail)
The following step consists of shorting the pads in gure 9.
Use the soldering iron with some added solder to ensure proper
joining.
The solder joints should look like in gure 10.

INDEX
DSP Lite | 5
(Figure 11 - Modified DSP Lite)
The last stage consists in soldering the XLR/TRS female
connector.
We strongly recommend Neutrik NCJ6FA-V for assured PCB
layout and mechanical compatibility.
Simply hold the connector in place and solder it (Figure. 11)
The DSP-Lite is now hardware-congured for two-input
operation.
Please refer to the DSP-Lite User Guide for two-input DSP
routing conguration.
Warning: in order to avoid unwanted short circuits between the conductive parts of the XLR connec-
tor, do not use exceeding quantities of solder, as it may seep trough the PCB with unwanted results.
Please avoid pushing the XLR connector with too much force when soldering, as this may also yield to
unwanted short circuits between the delicate components.

INDEX
6 | DSP Lite
IMPORTANT SAFETY ADDENDUM
The aim of this addendum is to describe the safety precautions to be undertaken when servicing any Powersoft amplier/module.
WE RECOMMEND THAT ALL SERVICE OPERATIONS ARE CARRIED OUT BY A TRAINED TECHNICIAN
IF NOT EXPLICITLY STATED OTHERWISE, DISCONNECT THE AMPLIFIER FROM THE MAINS.
Common signs description:
The following is a description of all the warning signs that are commonly implemented throughout our range of products, and those that
are mandatory in every service station or workplace.
Label Meaning
General Danger
Danger: High Voltage
Danger: Hot Surface
Danger: Electrostatic Discharge (ESD)
Electrical Grounding Point
Protective Footwear Must be Worn
Observe precaution for handling Electrostatic
Discharge sensitive devices
Safety precautions:
We recommend to follow all precautions stated by the law while
handling sensitive electrical components.
All of the servicing work must be carried in a EPA ESD compliant
environment, with the exception of the mere handling of the mechanical
parts.
An ESD protected workstation consists in:
• Static-Dissipative working surface connected to the EBP (Farnell 1503198)
• Wrist-chord and wrist band connected to the EBP (Farnell 1546970)
The technician must wear:
• Protective Footwear
• ESD EPA clothing (Farnell 1735510)
• Static dissipative gloves (Farnell 1503210)
ALWAYS DISCHARGE THE INTERNAL CAPACITORS BANK PRIOR TO SERVICING THE AMPLIFIER
The following pictures portray the minimum ESD-Protected setup,
including static dissipative working surface and wristband connected
to an Earth Bonding Point connected to the ground.

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Data are subject to change without notice. For latest update please refer to the online version available on www.powersoft-audio.com
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