Soredex CRANEX Novus e - Page 73

64 Service manual
4. Troubleshooting CRANEX
®
Novus e
2. L1600 (Z-motor driver) supplies mains voltage to
the P1910 (FPC board) via a fi lter.
Check that LEDs
A5 = +380V,
A8 = 27V5,
A9 = -20V,
A10 = +17V
and A15 = -15V on P1910 are on.
If they are not on check fuse FH2, and replace if
blown.
If the fuse is not blown check and if necessary re-
place the cables between L1600 and the fi lter and
between the fi lter and P1910.
If the LEDs on P1910 still remain off, replace
P1910.
If the P1910 LEDs are on but the display is not
working, check the LEDs on L1500 (Power Supply
Board). LED:
D8 = +15V on when CCDENA is active
D9 = +3V on when CCDENA is active
D10 = +3.3VD on when CCDENA is active
D12 = +5V, must be on
D13 = +5V on when CCDENA is active
D14 = -9.9V on when CCDENA is active
D16 = +24V, must be on
D17 = +3.3V, must be on
Test jumper J23 can be used to set on CCDENA;
Open=default, closed=CCDENA enabled
If the LEDs do do not function as described above,
check the cable between P1910 and L1500. Re-
place if faulty.
3. L1500 supplies 24V to L900. At normal state, the
leds burn when 24V voltage is connected to L900.
H1 is +3.3V indicator led, touch controller ic pow-
ered with +3.3V. H2 is +15.8V indicator led for LCD
backlight voltage(OPTREX T-55265GD057J-LW-
CAN not default).
Check that LED H1 is on (green). Check that LED
H2 is on (green). If LEDs H1 and H2 are not on
replace L900.
H3 is on (green) as the +5V comes from L1200
(CPU board).
4. Check the cables between L900 and the LCD-dis-
play. If the cables are okay, replace LCD-display.
Check the cable between L900 and L1200, replace
if faulty.