CopyrightJust some of our many service solutionsCopyright

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Excellent Hi-Quality Cables made by and / or Supplied By Unitech Electronics Pty. Ltd.

Phone: +61 2 9820 - 3555

Major update April 26th 2019
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Current from March 30th 2018


CIRCUIT BOARD LAYOUT and DESIGN     C.A.D. - just one of our services

Please note - we do NOT " mass-manufacture " circuit boards. We do however, design the circuits and

can facilitate the layout, prototyping in either Single-Sided or Double Sided P.C.B. to your specifications.

A more detailed drawing of a six-layer Circuit board

Above is a " reasonable explanation " of a six-layer PTH (Plated Thru-Hole) PCB (Printed Circuit Board).
Note the layer identification names.

A drawing of a multi-layer Circuit board

Above (Fig 1a) is a " quite exaggerated " exposed symbolic picture of a multi-layer thru-hole printed circuit board.
This is only a representation,    whereas in reality,    the process is quite involved and does not have parts on it.

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   As stated, yes, it is an excellent idea to condense a circuit into the smallest possible size thus saving on   
   the board's physical dimensions, doing so, there are strict "electronic" rules that govern the 
   passage of electrons along a particular  circuit board track which may induce a new headache that is called 
   cross-talk or "electronic noise" from one circuit to another, please be very aware of these constraints and 
   there are trade-offs in any circuit board layout or design, speed and noise immunity are the most sought after   
   features requiring " ground planes " to shield or rather contain and reduce "cross talk" or high frequency 
   " parasitic " oscillations from one track through a circuit board track to another.

Circuits for all

Ciruit board

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Ciruit board

Ciruit board2Ciruit board3


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Labour Rates graphic

    Labour rates   Repairs and modifications   
AUD$ 150.00 per hour ( $ 2.50 / min) 10% GST.  
( calculated as time taken in hours and minutes )  

Call-Out rates ( That is, we come to your office or workplace )   Repairs and modifications   
AUD$ 150.00 per hour ( $ 2.50 / min ) 10% GST.
( Calculated as company time taken in hours and minutes plus $1.80 / Km there and back returning to base. )
( Time attending is charged at $ 150-00 per hour or part thereof, calculated from our office and back to our office.)  


Please read this portion now before sending anything.

  As of today, March 15th 2017, unless you provide us with an acccurate circuit diagram of  the goods you 
  wish us to repair, we may not be able to service your goods. This decision was made due to the high amount 
  of customers who have just left their "goods" here, unpaid for and said it is now our problem, without 
  a circuit diagram as they did not wish to pay for our work done, nor pay for their present up-to-date service bill 
  and our company time spent on their behalf and any further works to continue tracing out the faults and 
  effecting a great result ie: A good repair.  Not any more. We are out of pocket for these little gems of deceit.

  Having a good up-to date circuit diagram is in YOUR BEST INTEREST as this cuts fault finding time down, 
  thus our labour time spent is also cut down. Just imagine being blind and being placed at the Sydney Town
  hall and being instructed to walk ( un-aided ) to Parramatta Town Hall.  
  I am quite sure this little example gets the message across. Working without a circuit diagram = No Go.

  We will from now on, be requesting for your credit card details first of all to cover any or all the costs. 
  Simple remedy : No credit card - No work. It's that simple !  This decision is final.

  This decision has been implemented by the given rise in losses in company time and of course, loss of 
  income due to failure by customers to pay us.  If your product's circuit board is less than 3 ~ 5 yrs of age, 
  possibly or maybe, if it is over SIX years, up to TEN years, it may be remotely repairable, 
  depending on the  brand, the accurate age, parts availability and how bad it is damaged. If it is over 10 
  to 15 years, then perhaps it is high time buy a new item and get a 12 or 24 or more month warranty.
  Regarding re-winding of small transformers. We will no longer perform this task, based on the time to very
  carefully disassemble them to carefully study and note the number of windings and what direction they are 
  wound and more importantly, what or why the windings became burned-out. 
  Often the question is asked " why did it burn out in the first place ?" Best guess is it had no thermal fuse.

  These financial losses are costs we cannot and will not absorb. Time spent in carrying out a repair on your
  behalf has to be covered under our company time. Time is money as they say. We are not a charity, nor a
  benelevent society. If you cannot afford to have the item or goods repaired, please choose somewhere else. 
  No " free-bees " here.
  We have increasing expenses and overheads to cover on a daily basis.  We don't want your dead products left 
  here unpaid for as these are re-cycle binned and trashed. 
  We simply do not have the facility to store your dead "junk" per se.

  We do like being paid for the sweat and time searching various resources to locate what a particular part is, 
  in consideration there are literally many millions of electronic parts made since 1970 by many manufacturers  
  of their own devices, some still in business, some are gone or absorbed into newer companies by Mergers 
  and Aquisitions (aka M & A). Fairchild Semiconductor is now owned by ON Semiconductors
  Eg: Phillips, then NXP, then EXPERIA and possibly it will alter within the next few  months, who knows ?
  The search for electronic component data sheets takes company time, circuit diagrams can sometimes 
  assist in most most cases, a with good and positive result for the items you brought for us to repair are 
  working.  The time spent , ON YOUR BEHALF looking to see what the parts actually are and their function
  is accountable company time spent and it must be paid for by your good self. We are not a charity and do not 
  work for free and please note, our component suppliers do not give away free samples of their parts just for you.
  We continually strive for perfection in all we do, that has been our hallmark since July 14th 1978 (Bastille day) 
  Do it well or not at all.   That is our everyday goal. 

  There's no-one called Nostradamus working here to make predictions or no-one with Superman's X-ray 
  vision to diagnose your problems by just  looking or glancing at a PCB.  The age old question, how much is 
  it going to cost me ?  Can you give me a quote first ?  What am I up for ? How long will you take ? etcetera.

  Hold on,...... where's my crystal ball ?.....  '   It is not a broken cup, it is not a bent table leg, nor is it a
  cracked engine piston.   We only deal in and work in absolutes. It is black or white, no shades of grey.
  In electronics, THERE IS NO ROOM FOR ERROR !  It is an exacting science learned over many, 
  many years.  Try 48 years of time spent servicing and designing various electronic equipment.

So, in re-capping, No accurate circuit diagram, No service work will be done.
____________________ Resolution meeting 7:00 pm 15/03/2017 ____________________

  Please note: For repair work , it is advisable to acquire a correct circuit diagram prior to delivery of your 
  goods or equipment to be serviced and repaired. If one is not supplied, then we will need to do " reverse 
  engineering " of the circuit and tracing it out fully, thus establishing a correct operational circuit schematic 
  diagram to work with for fault finding. Without a circuit diagram is like trying to drive to Canberra blindfolded. 
  It simply costs time and money. Remember, this is not a free service. Company time is costed per minute.
  The cost of tracing out and creating a circuit diagram is always borne by the customer/client. No free rides.

  If you do not have a schematic, you should procure one as soon as possible, making sure it is the best 
  and most up-to-date circuit diagram exactly for your valuable PCB (s) you wish repaired. Also, does your 
  PCB have esoteric components ?   If it does, then data sheets must be found to support what these 
  esoteric parts are. There have been many millions of components made since 1970. What do you have ?  
  Are they specialised ?  Are they still available even as new old stock ?  Who stocks them today ?
  We do not do quotes for electronic equipment work as no-one can make asumptions without fully finding 
  the faults by simply "sniffing the circuit board" or for that matter, stating "Gee mate, the fuse is blown !"  
  That is not going to get you through the job of finding out what died and why. The why is more important.
  There are so many variables in service work and no-one is Nostradamas here and can make a certain 
  prediction just by looking at your dead printed circuit board.   Superman's X-Ray vison will not work either. 

  Having an accurate circuit diagram will typically make service work a whole lot simpler and more precisely
  better.   This will cut down wasted time in trying to establish how the circuit works and what faults stop 
  it.  There is no  guess-work here.     We do not own a "crystal ball"     and as mentioned, no-one here
  answers to the name of  " Nostradamus ".


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H O U R L Y    L A B O U R   R A T E S   F O R   R E P A I R S

Labour Rates graphic

Major billing update April 26th 2019

   Labour rates for al lREPAIRS and / or all SERVICING WORK is billed at $ 150.00 per hour or 
   ( $150 divided by 60 = $ 2.50 per Min ) plus 10% GST.  We bill for actual company time spent.

   This equates thus as for 1 hour, $150 plus 10% GST = $165 including GST or if we calculate 
   in minutes, whereas $ 2-50 per Minute + GST = $ 2-75.So, therefore 47 minutes = 47 x $2.50
   equals $117.50 plus 10% GST ($11.75) = $129.25 total including GST. Some jobs take minutes.

   This increase today, April 26th 2019 is our first price increase since May 1st 2002 
   (ie: 17 years to cover ever increasing costs and overheads and updating service equipment.

   Please Note : Labour rates DO NOT include any materials or components we actually stock 
   or we have to "order-in" NOR DO they include any GST component. 
    GST is added and charged at 10% of the final sales price, this includes parts, labour and freight.

    Please also note :-  Time taken is as with some jobs is calculated in months, weeks, days, 
    hours and / or minutes, this is depending on complexity and the availability of a accurate circuit.  
    diagram.    As you may have deduced, a circuit diagram is invaluable an accessory to success.


    Labour rates design work  Prototyping ......... AUD $ 150.00 per hour ( AUD$ 2.50 / Min )..... Plus GST.     

   ( time taken is calculated in months, weeks, days, hours and / or minutes depending on complexity )   

    Please Note : Labour rates do not include any materials or components nor do they include GST. 

    All parts and materials used are in addition to time spent on the client's behalf to get a project to fruition.   

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Labour Rates graphic

S E R V I C E    and     R E P A I R S
Updated April 26th 2019

      Please be aware, we are not a " results only company ", that is to state as in " only " being paid "only" 
      if the result is goods or equipment works.  We accept  "your goods" for repair or service in good faith, however  
      if it is found at some stage during the repair(s) that the said item (s) for repair or service are not going result 
      in a  positive working outcome, either due to the age of item(s) or component(s) that are " still now " available
      in stock, we will advise you of the costs so far in arriving at this conclusion. There are no "Free lunches".

      If we have to leave our premises and obtain parts on your behalf, making sure the parts are the correct size, 
      or correct dimensions and equal to or better than the original, then this service is charged at the same rate 
      as $150 per hour + GST, $2.50 per minute plus GST, this accounts for driving time to and from a suppliers 
      premises to inward goods inspect the parts / components and pay for them on your behalf. This cost is borne 
      by you the customer and vehicular running costs based at $1.80 cents per kilometer there and back to our office
      are to be applied. So, recapping, time spent collection the parts, ( to and from ) plus kilometer costs + time.
      All company time is accountable for. This is only fair as where you work, you would not like be NOT PAID as a 
      result of a project or job not working out right and your boss telling you, "tough luck mate.... it did not work so
      no pay for the hours you wasted on trying to get it going".   Resolution Meeting: August 12th 2012   7:35 pm .

      New resolution and meeting, ( after maintaining a $100 per hour from May 1st 2002 ) until today April 26th 2019, 
      we have caved in to pressures after 17 years, to raise our labour rates to $150 per hour, plus GST.  This is largely   
      to do with increased running costs of which we can no longer absorb and our continued investments in new and
      current technologies, technical electronic measurement tools, Digital Storage Oscilloscope,  CRO's as well as a
      far higher than any previously maintained stock level overheads. Being a Lawyer or Barista would have been a far
      better paying career and charging between $6,000 to $10,000 per day with no parts to stock is outstanding.  
      Resolution Meeting:  April 26th 2012   9:30 am .

Labour Rates graphic

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      We require payment for company time spent on your behalf working on your goods or equipment irrespective of   
      the final results that the item(s) in question are working. We strive for perfection in servicing and repairs, however    
      there are times where component tolerances change over the years, often resulting in undesirable board faults  
      that are "hard to diagnose" along with often inherent stray capacitances and weird parasitics etcetera, plating 
      "growths and spurs" or "Whisker formation" that creep into circuit boards over time. Many companies, including 
      NASA have notes on this strange and very undesirable phenomenon.

      Other servicing prblems to be remembered are the adhesive holding copper tracks and pads (aka lands) onto a 
      PCB.    Over time, the copper foil "adhesive" between the fibre glass board does break down to a gritty powder, 
      thus if a circuit board is quite old, it will inevitabley become a major issure or problem for who ever solders or 
      repairs that "older" PCB ( Printer Circuit Board ). That is just one "age old" issue to seriously contend with. 

      Copper tracks and pads tradionally do not like being heated too much and the net result of the heat from a hot 
      soldering iron, it can and does become annealed or brittle and fractures. This too is simply not good.

Labour Rates graphic

This rule ( above ) does not apply to goods or products manufactured by us, here at     Unitech Electronics Pty. Ltd. We support our own manufactured goods & equipment    with stocks of quality original "backup service" parts for up to 5 years Ts & Cs apply. 

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There are Circuit Rules

What is involved in a simple design, taking an idea or concept through to a completed product

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Flow chart on Ciruits

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Please note - we do NOT "mass-manufacture" circuit boards, we do
however, design the circuit layouts and single-sided prototypes.

Unitech Electronics Pty Ltd is your one stop "global shop" for all your "computer" and "Electronic"
Hardware solutions , we design and manufacture for you.         We make it happen for you!

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Why am I getting small shocks from my Electronic equipment & it is biting me with electrical sparks ?

  Why am I getting small shocks from my Electronic equipment & it is biting me with nasty electrical sparks ?

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