The Real Buyer’s Guide to Second Hand DJ Equipment
If you are buying used DJ equipment, there are a few things that matter far more than everything else.
The issue is with most used gear does work is that it has not been properly tested, and faults are common. The difference between a good purchase and a bad one usually comes down to knowing what to check.
This is the same process used when sourcing equipment for resale.
Check the mainboard
Every unit is built around a central PCB, known as the mainboard. It is the only part that is not easily or cheaply replaceable.
Components such as faders, EQ pots, jog wheels, screens, and ports can all be repaired or replaced without major cost.
The mainboard is different. On most modern Pioneer DJ and AlphaTheta units, it is expensive and sometimes difficult to source.
The goal when buying used equipment is simple. Confirm the mainboard is healthy. Everything else can be worked around.
Service mode
Most Pioneer units include a built-in diagnostic mode used by technicians.
This allows you to test:
- Buttons
- Knobs and pots
- Faders
- Jog wheel movement and touch
- LEDs and screens
If a button does not register correctly, or a pot shows inconsistent values, that indicates wear. These are repair jobs, not deal breakers.
Service mode is one of the fastest ways to assess a unit properly.
Common wear points
After regular use, certain parts fail more often than others.
Players such as CDJs and XDJs
- Jog wheel touch sensors
- Pitch faders drifting
- USB ports loosening
- Screen wear or dead areas
Mixers
- EQ pots wobbling around, and showing incorrect readings
- Channel faders worn down
- Headphone jacks not working on both L/R
- Crossfaders shaky and loose
- FX pot feeling overly loose
- Cue switches, and other FX switches not responsing
Controllers
- Performance pads losing sensitivity
- USB power issues on bus-powered models
- Jog touch inconsistencies
These issues are normal on used equipment and are usually repairable.
Checks most buyers skip
Audio outputs
Test RCA and master outputs with audio playing. Move the cable slightly at the connection point. Any crackle or drop in signal indicates a problem.
USB ports
Bring a USB stick and test every port. Check for a secure connection. Loose ports are common but repairable.
Encoders
The encoder shoudl click in, and register forward and backwards movements
LINK / Ethernet port
On CDJ setups, this matters.
Connect a cable and test the link. Check that the connection is stable and the port feels secure.
Issues here can indicate deeper problems and should affect the price.
Touchscreen
On newer units, scroll through menus and press across the entire screen. Dead zones are not uncommon on heavily used units.
Buying online
A large number of issues come from shipping rather than the original condition of the unit.
DJ equipment is heavy and tightly packed internally. Poor packaging can cause:
- Intermittent faults
- Loose connections
- Internal damage
If buying privately, how the item is packed matters as much as how it is described.
Simple checklist
Before buying:
- Run service mode if available
- Test all audio outputs
- Check USB and LINK ports
- Test jog wheel and pitch fader
- Inspect screen and pads
- Consider shipping and packaging
If several issues are present, either renegotiate or walk away.
Final point
There are good deals in the second-hand market, but only if the unit has been properly assessed.
Most faults are manageable. The important part is identifying the ones that are not.