UNITED PRODUCTS & INSTRUMENTS INC. UNICO 1100, Руководство по обслуживанию

Страница: 22 / 36

4.3 TROUBLE SHOOTING #1
36-22
Pilot light
on?
Display on?
Check if LCD display
and wiring OK?
Is 115V or 230v
Power on?
Switch function?
PC power Function?
Check the +8V and
–8V On the power
supply board?
Refer to Fig.5.1.1 to
check +8V and –8V
power supply
supply
Problem:Turn on, No display
A:Replace CPU board
B:Sloving wiring problem or
replace socket A2,A3
Line power on
Replace R13-69A switch
Replace PC power
Is diode working fine?
How about wiring?
A:Replace φ3
green diode
B:Sloving wiring
problem
Y N
Y
Y
Y
Y
N
N
N
N
N
N
N