Intelligent UFM-B, Maintenance Manual, Page: 17 / 43

16
CHECK LOAD CELL,
A/D UNIT,OFFSET
VALUE
CHECK POWER
SUPPLY,LCD,LCD
DRIVER IC,R37,38
CHECK PLATFORM
STOPS,LOAD
CELL,A/D UNIT,
BAD SOLDERING
RE-CALIBRATE
THE SCALE CHECK PLATFORM
STOPS,LOAD
CELL,OFFSET
VALUE
3. TROUBLE SHOOTING
3.1 TROUBLE SHOOTING LOOP
POWER ON
COUNT DOWN?
NO DISPLAY
DISPLAY RANDOM
FIGURE
CHECK POWER SUPPLY,
CPU,LCD,KEYBOARD CHECK CPU,LCD,
LCD DRIVER IC
OK
COUNTS AND
THEN ZERO?
OK
PROPER READOUT?
CORRECT READOUT?
NORMAL OPERATION
SHOW
“
00000
”
UNSTABLE GHOST
OK
OK
INCORRECT
CAN
’
T REACH FULL
CAPACITY