Huazheng CS2670A User Manual

41
Maintenance of Withstanding Voltage Tester（Ref. to below list）
Maintenance Guidance of Withstanding Voltage Tester
(6)Whether three-terminal
Steady pressure machine 7812
is broken?
Change 7812
(7)Whether C1~C4 capacitor is
electric short
Change relevant
capacitor
(2) Alert when open
the instrument
(1)Keys of leakage current level
flick
Press down any key
(2)LM324 is broken.
Change 324
(3)Sample resistor on Leakage
current switch is open.
Change relevant resistor
(3)Start, Reset failure
(1)556 is damaged
Change 556
(2)Relative Start or Reset key is
broken.
Change the relevant
switch
(3)The linking jack is loose on
main circuit board.
Secure the jack
(4)Lead on main circuit board is
open.
Weld the lead well
(4) State in test while
turn on the machine
556 is damaged.
Change 556
(5) Timer fails in start
when testing.
(1) Timer plug is loose.
Secure the plug
(2)4060 is broken.
Change 4060
(6) Timer cannot reset
when time is up.
(1) Timer plug is loose.
Secure it
(2)Timer 9013 is broken.
Change 9013
Faults
Reasons
Measurements
(1)Power light cannot
be bright when turned
on, and no indication
and output.
(1) Whether power supply is
connected well？
Connect power supply
well and test by
multimeter, there
maybe 220V.
(2)Whether fuse is OK？
Change fuse
(3)Whether power switch is
OK？
Change power supply
switch
(4)Whether there is about 17V AC
voltage at the output terminal
of transformer, if no, the power
transformer maybe broken.
Change power
transformer
(5)Whether rectifier diode is
broken?
Change corresponding
rectifier diode

Huazheng CS2670A Specifications

General

Brand	Huazheng
Model	CS2670A
Category	Measuring Instruments
Language	English