ZX-News #24 12 марта 1997

Железо

Iron - Repair Scorpio: How to protect yourself from the trouble to repair.

                  IRON



                          (C) Sergey Zerov


      Continuation of a series of exclusive

  articles on computer repair Scorpio.


  To begin with an indicative price list
repair work in the firm Scorpion:


   1. Minor repairs:

 - Includes a inspection fee and replacement

   02.01 transistors and (or) 1 chip

   1533 Series


  Repair Cost: from 0 to 10 t.p. + Cost of parts


  The repair time: 30 minutes, in the presence of the customer


   2. The average repair:

 - Replacement of 2-4 m / s 1533 Series
 - Replacement of Z80 without panel
 - Replacing more than 2 565RU7
 - Replacement of any panel
 - Restore the board after

    self-repair


  Repair Cost: from 5 to 20 t.p. + Cost of parts


  The repair time: 30 minutes to 2 days

                     (Excluding weekends)


   3. Major repair:

 - Replacing more than 8 m / s of any series


  Repair Cost: 15 t.p. and up + cost of parts


  The repair time is stipulated in addition!


   4. Overhaul:

      (The board walked 220 volts or a herd of elephants)

 - Repairs carried out on request


  Generally cheaper and easier to buy a new card!


        Prices for replacement parts:

 1533 logic .................... 8.5 t.p.
 1533IR22, 23 .................... 8 t.p.
 565RU7 or similar import .. 8 t.p.
 VG93 ........................... 20 t.p.
 Z80 ............................ 20 t.p.
 ALTERA (ims. for turbirovanie). 20 t.p.
 Panel prof.pzu ................ 25 t.p.


  Prices of items are listed with the cost of inspection fees 
on all parameters in the stand in the presence of the customer. 
Permanent customers and simply the well-known personalities

contributing to the "sorpionostroenie"
given the global discount.


  If after the above you still
remains a desire to mend his own
Scorpio, or you are unable to us
come and offer another short article on
repair.


      How to protect yourself from harm

                 during repair.


  1. Axiom. At the sting of any included in the
Network soldering iron, you may receive 220 volts.


  Consequences: The average repair, rolling

               in the capital.


  Remedy:

 a. Use low voltage soldering iron
 b. Ground the soldering tip
 c. If any work off the computer does not
only on the network (unplug it),
but also from all peripheral devices (TV,
printer, tape, etc.).


  2. Axiom. Not picking included blocks
supply.


  Implications: sad. You can lose not only pay, but also part 
of the periphery together with the chunk of health.



  Remedy:

 a. Use high-quality power supplies
 b. Not picking PSU


  3. Axiom. Not everything that is heated - is defective.


  Consequences: The extra work.


  The board can be quite hot the following elements:

 a. RAM, especially in motherboards turbo + imported analogues 
RU7  b. IC 531 Series DD2 and in some older

Boards DD63
 c. 556RT11 (older motherboards RT4)


  Some devices can bask in
because of failure of elements to which they are loaded (the 
breakdown of the entrance). But it can be determined only by 
CAREFULLY cutting tracks. 

 4. Axiom. Duration of the signal INT AS
    tionally 9 ms.

 Implications: Glitches when working with prof. ROM
and with some programs.

 Remedy:

 a. On the old board - selection of RC - chain.
 b. On-board turbo + - check circuit formation.



  A snack a little news specifically
for his beloved newspaper:


    1. Came out the next version of prof.
ROM 3.9e. Working with the controller and the HDD
NETURBIROVANNYMI boards. Is catching bugs ... ;)


    2. Changed the firmware ALTERy for turbo
boards. Increased speed of memory operations by an average of 
20%! Works with ROM V2.95 and prof. ROM V3.9e. Is catching 
bugs;) 


    3. Came to us guys, and showed
2Mb RAM Scorpion (2 SIMM 1Mb)!! Somehow
works!? And it is not buggy with different peripherals.


  That is all. On all questions write
letter ZxNews or call:


      (812) 251-1262, Sergei lasers.


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