«NPK Morsvyazavtomatica» LLC
Operating manual
Page 14
4
CURRENT REPAIR OF THE PRODUCT
4.1
G
ENERAL DESCRIPTION
Operability of the Product is indicated by presence of piano type switch backlight,
located on the casing.
To diagnose the problem, see table 9.
If you cannot diagnose the problem, contact the Manufacturer’s service centre.
4.2
S
AFETY FEATURES
Any repair works must be provided by personnel examined and received proper
qualifications in the area of the occupational safety.
Check grounding of the PSU before providing any repair works.
It is PROHIBITED to put a poster “DO NOT switch on! Under Operation!”, when
power supply switch is in OFF position.
Replacing damaged parts, boards, modules is
PROHIBITED
if power supply
of the repaired unit is on
Installation, aligning and repair works are
PROHIBITED
in the room, where
less than 2 people are present
4.3
C
URRENT REPAIR OF THE
P
RODUCT
The list of malfunctions that can be eliminated by own employees is represented
in table 9.
The repair of other malfunctions can be done only by Manufacturer’s specialists or
Manufacturer’s authorized representatives.
Table 9 – The list of possible malfunctions and troubleshooting
Malfunction
Possible reasons
To be done
Voltage is absent on
the PSU output when
SB is switched off
Power supply voltage is ab-
sent (piano type switch
doesn’t glow)
Check the power cable connection
Supply the power (a circuit breaker on the
power mains switchboard might be probably
switched off)
Fuse malfunction (PS-103)
Replace the fuse
Circuit breaker is switched
off
(PS-103-20)
Take off the PSU cover, switch on the circuit
breaker inside the PSU