>1. the DQSS-4 series processor direct current
power supply system explained that,
The DQSS-4 series processor direct current input has +8V, -15V,
the +36V three kind of supply voltages, in the processor electric
circuit uses +5V, +8V, +7V, +6V, -7V, -12V, the +36V seven kind of
voltages. Among:
1.1 +5V voltage is (CW7805) two constant voltages produces by
the +8V power source after N3, the digital integrated circuit provides
the DC voltage for the processor electric circuit in.
1.2 +7V voltage is (HZ7B3) two constant voltages produces by the
+8V power source after zener diode VD11, specially is D1, D2 two piece
of multichannel analog switches CD4051 provides the supply voltage.
1.3 +6V voltage is (HZ6C3) two constant voltages produces by the
+8V power source after zener diode VD1 is the A/D switching circuit
provides the supply voltage.
1.4 -12V voltage is (79L12) two constant voltages produces by
the -15V power source after N2, (LF347) provides 负电?the voltage
for operational amplifier N1, the supply voltage directly provides by
the +8V power source.
1.5 -7V voltage is (HZ7B3) the constant voltage produces by -12V
after zener diode VD12, is D1, D2
(CD4051) provides 负电?the voltage.
1.6 +36V1, +36V2 are separately passes through by +36V R30, R31
to C28, the C29 charge, in C28, the C29 beginnings and ends separately
obtains +36V1, the +36V2 voltage. +36V1 is the 1~7 spindle
examines
Measures the cutter relay slaving voltage,
simultaneously for comparator D17: A (LM324) provides the
comparison voltage; +36V2 is the 8~15 spindle examination cutter
relay slaving voltage, simultaneously for comparator D17: B
(LM324) provides the comparison voltage. 2. processors direct
current power supply system common breakdown and processing
2.1 +5V voltage is not normal
2.1.1 breakdowns produce possible reason:
A. The fuse FU2 separation or the contact is not good;
B. Three ends integrations voltage-stabilizer circuit
CW7805 damage or the performance change the difference;
C. In the electric circuit 0.1 mu filter electric capacity
have the leakage or short-circuits the phenomenon;
D. In the processor electric circuit uses the 5V power
source the integrated circuit chip to have the individual damage, or
the interior short-circuits.
2.1.2 processing methods
A. Inspection fuse FU2 breaks otherwise or the
contact is not good;
B. Whether there is inspects CW7805 to damage or the
performance changes the difference, surveys CW7805 with the digital
voltmeter 1 foot to have the +8V voltage, whether there is again
surveys the out-port 3 feet +5V voltage, if does not have or
电压过高, excessively is low, then the CW7805 damage or the
performance change the difference, replaces CW7805.
C. Surveys the +5V voltage resistance to ground, if the
resistance is smaller, only has the number ohm, very possible to have
the filter electric capacity leakage or to short-circuit, or has some
or many integrated circuit chip damage, the interior short-circuits.
Between the one by one inspection integrated circuit VCC foot
and the place the resistance, the replacement interior short-circuits
integrated circuit chip.
2.2 +7V voltage is not normal
2.2.1 breakdowns produce possible reason:
A. Zener diode VD11 (HZ7B3) short-circuits;
B. The electric capacity C1 leakage or short-circuits;
C. The multiway switch CD4051 interior short-circuits.
2.2.2 processing methods
A. The inspection replaces VD11 (HZ7B3)
B. Replacement electric circuit C1
C. Inspects D1, which interior D2 (CD4051) judges
is short-circuits, and replacement.
2.3 +6V voltage is not normal
2.3.1 breakdowns produce possible reason:
A. Zener diode CD12 (HZ6C3) short-circuits;
B. The electric capacity C2 leakage or short-circuits;
The c.A/D switch electric circuit interior short-circuits;
2.3.2 processing methods
Inspects VD12, C2 and the A/D transformation road
whether does short-circuit, replacement damage primary device.
2.4 -12V voltage is not normal
2.4.1 breakdowns produce possible reason:
A. the -15V fuse FU□□1 separation or the contact is not good;
B. The electric capacity C4 leakage or short-circuits;
The c.79L12 damage or the performance change the difference;
D. Transports puts the LF347 damage.
2.4.2 processing methods
Produces the reason inspection primary device according
to the breakdown whether damages, replacement damage primary device.
2.5 -7V voltage is not normal
2.5.1 breakdowns produce possible reason
A. the -12V voltage is not normal;
B. Zener diode HZ7B3 short-circuits;
C. The electric capacity C3 leakage or short-circuits;
The d.CD4051 interior short-circuits;
2.5.2 breakdowns processing method
Produces the reason inspection primary device according
to the breakdown whether damages, replacement damage primary device.
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