Iron
(C) Sergey Zerov
Repair Scorpion with his own hands.
Part II.
So, to celebrate rozhdenie Head (Zonova SY), proceed to the
expulsion of a regular Wikipedia repair Scorpions. ;)
Today the paper is devoted to typical faults identified in
the process of setting up and maintenance fees Scorpion ZS256
Turbo + Release 1996. All references are to the concept.
Errors in par.
C17 150 pF for the scheme. Upgradeable
from 120 to 200 pF.
In a number of boards is 270 pF. In consequence
This can not work professionally
ROM (TRAC ROM), especially when installing additional
controllers (IBM Keyboard and HDD). Moreover, conventional ROM
work.
Similarly, the impact R58 (must
be 560 ohms).
In the converter board used 5 volts
in 12 to power the controller VG93. Par
Throttle indicated 10 - 20 mkH. Really should be 20 - 30 mkH.
When the inductance of less than 15 mkH may reduce stress up to
10 volts and as a result, errors write to the disk (disk
damage). Sometimes blame VT7 KT315.
C2, C3 scheme 1n. Due to errors in face or defect in the very
details, the board can spontaneously switch mode
Turbo / Normal.
R33 scheme compact 1.5. Some types
processors may require a reduction
this resistance to 560 ohms (increase
amplitude of the clock signal).
C9 33 uF. When reducing the face value (for
by drying) may not pass the initial power-on reset.
Typical fault.
Whereas the statistics for tuning and repair in the first
place I put the input divider is made on the IC. 531TM2. There
are 3 types of faults:
1. No output 7MHz. Fee is silent, like a log. 531TM2 heated,
such as iron.
2. Board works, but on the initial menu
out slowly, gradually prorisovyvaya
line and beyond.
3. Board is working on the menu comes out fine but does not
respond to the keyboard because of no signal INT-.
A similar problem occurs
because of the strong overheating power supply failure. In this
531TM2 serves as additional protection (usually burning with
stabilitron KS156).
Well enough for today ... Tired ... ;)
In the next room you'll learn a little more sensitive
information about self-medication cards Scorpion ZS-256
traditional medicine:)
All of your questions to the author of this Wikipedia you can
ask by sending Letter to the Editor ZxNews, or soap and water:
E-Mail:
FidoNet (2:5030 / 362.2) @ Ilya Vasilyev
C respect - Sergei lasers.
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