How to choose a good Lexia 3 clone for citroen peugeot

A cheaper lexia 3 citroen peugeot diagnostic tool (sp08-d) for only 71GBP but there are missing some chip, compared to the original one.

cheap lexia 3 is designed with this kind of board

cheap-lexia-3-board

Original lexia 3

good-lexia3-pcb

On original interface “those caps” are resitors (473) 47k – R5 and R6. Optocouplers seems to be HCPL-063N-000E and HCPL-0500-000E. Also the filter from USB input is ACM2012D-900-2P (TDK) – most of clones have not this USB filter (2 resistors of 0 ohms are used).

On relay pcb the round red component is a varistor and original is V18ZA40P (in most clones is blue and have not the same specifications as the red one).

On relay pcb there is another optocoupler ZJYS51R5-2PT-01 (TDK) on the edge area near relays used for VAN BUS.

Some pictures from an original XS EVOLUTION PCB revision C.

lexia3-board-1

lexia3-board-2

lexia3-board-3

there mainly are two kinds of Chinese Lexia3 from different factories. One cheaper but lack some chips, the other with full chips of high quality.

The good Lexia 3 should come with PCBs as follows:

 

sp08-c-lexia-3-pcb-3 sp08-c-lexia-3-pcb-4 sp08-c-lexia-3-pcb-1 sp08-c-lexia-3-pcb-2

It’s item no.sp08-c: (much better quality than sp08-d)
http://www.obd2shop.co.uk/wholesale/professional-lexia3-pp200-v25-with-diagbox-v601.html

even if the PCB is designed as above, there are some different similar clones, not all HQ.
This is the comparison: the left: good ; the right: bad

good-lexia3-vs-bad-lexia3-3 good-lexia3-vs-bad-lexia3-1 good-lexia3-vs-bad-lexia3-2

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