Hunter wheel alignment Dsp600 board - Page 1
Forum section: electronics / repair

author: hmetro24
author_rank: Newbie
timestamp: August 20, 2025, 12:18:00 pm
content: I have a board from hunter wheel alignment dsp600 , the board connects to pc using usb typ b cable, the board get power from external power supply.the pc suddenly stopped recognizing the board , cable is not the problem neither the usb b port.there is not short in data line D+ D- , it use pdiusbd12d usb controller , i replaced it but still not recognized by pc, there is 3.3v power at vcc and 3.3out .i dont have oscilloscope(should have 1 soon), to test the crystal, however on the pads it is showing 1.5v 1.6v.there is a resistor r139(in the 2nd photo beside the 510 resistor) that goes to the vcc line and it is getting super hot, marking been wiped , it measure 11ohm. so i dont know if the actual ohm is 11 or has been dropped, also not sure what type of resistor it is normal resistor, sense resistor , fusible resistor....what could be the problem with it. what to look for?

author: Swake
author_rank: Frequent Contributor
timestamp: August 20, 2025, 06:45:23 pm
content: 3,3V.... This board looks like it is from an era that used 5V for logic. Maybe something is wrong with the power supply, or some component is breaking it down (could be that unmarked 'resistor')Please measure voltage of the external power supply without it being connected to the board. Are there specs written on that power supply?It would help somewhat if you could post higher resolution pictures of the main board. It is ok if you have to take multiple pictures to have the whole board. I'd like to read what is written on the chips.That green resistor might indeed be something other than a resistor. One side is on Vcc, but what is on the other side?What are those circles marked with SK#, battery connectors of some sort? Is there something on the other side of the board?

author: Swake
author_rank: Frequent Contributor
timestamp: August 20, 2025, 06:52:49 pm
content: Hooo.... those round things are connectors for 1-wire buttons. They contain codes/keys.

author: hmetro24
author_rank: Newbie
timestamp: August 20, 2025, 07:33:22 pm
content: there is 5volt 12volt and 3.3v from the psu( it is regular atx pc psu) , but the pdiusbd12d either use 5volt or 3.3v which is soft connect. The 5volt from the usb port goes no where.yes those round battery look are keys for software different software versions, and they are expensive.https://www.ebay.com/itm/205656004925?itmmeta=01K34EYX2M92KZCP17F8ZMDRYH&hash=item2fe20d993d:g:mFYAAeSwPJ9ok2MC

author: Swake
author_rank: Frequent Contributor
timestamp: August 20, 2025, 07:52:58 pm
content: These new pictures are from a different board.You focus on the USB, but is the rest of that board working normally?On the pdiusbd12d the pins 1 to 4 and 5 to 9 are data lines connecting to the MCU. Any activity in these lines?

author: hmetro24
author_rank: Newbie
timestamp: August 20, 2025, 08:01:34 pm
content: The are 3 leds for the board, 2 led lights up, just the usb led does not light up . regarding the 1-4 5-9 pins , i don't have tools oscilloscope to test data communication, should have 1 next week .what about this greenish resistor ? any idea, it connect from vcc to ground

author: hmetro24
author_rank: Newbie
timestamp: August 21, 2025, 09:56:00 pm
content: this is a similar board to the 1 i have it has a black look resistor with writing on it. the one i have became green color with no marking, who can tell or guess what it is possible to be . it is between the 2 black colored plugs

author: Swake
author_rank: Frequent Contributor
timestamp: August 22, 2025, 06:15:14 am
content: That picture is not readable, can't make anything of it.Green resistors exist. The green colour might be a sign (or not) of a speciality such as 0.1% precision resistor or high voltage. Not having markings is not common but I have seem plenty. The ceramic base is also an indicator. It is marked R139, this is in line with the rest of the board. So yes, it is a resistor.It does not make much sense to put a resistor across Vcc and GND on a board like this. Double check that please.

author: coromonadalix
author_rank: Super Contributor
timestamp: August 22, 2025, 01:54:52 pm
content: any older computer who can talk to it, drivers updates who messed up thingsthe pcb could be okay after all ??in device manager is it declared or have exclamation marks ?

author: hmetro24
author_rank: Newbie
timestamp: August 22, 2025, 03:57:48 pm
content: no not at all , not recognizing any thing even on another pc/laptop. not showing as new device is being connected