Casio LK-125 Service Manual & Parts Manual page 17

F. KEYBOARD LED PCB (M821-LDA1/LDA2, CSM446-LD3M/LD4M/LD5M)
CSM446-LD3M PCB
M821-LDA1 PCB
F-1. Undo 14 screws on the M821-LDA1/LDA2 PCBs.
F-2. Turn over the M821-LDA1/LDA2 PCBs.
NOTE: Do not touch the LEDs.
F-3. Unsolder three FFCs and then remove the M821-LDA1/LDA2 PCBs.
NOTE: After repairing, arrange the FFCs again.
F-4. Undo 12 screws on the CSM446-LD3M/LD4M/LD5M PCBs and then remove the CSM446-LD3M/
LD4M/LD5M PCBs.
NOTE: After repairing, arrange the FFCs again.
FFC (CSM446-LD3M)
CSM446-LD4M PCB
M821-LDA2 PCB
FFC (CSM446-LD4M)
– 15 –
CSM446-LD5M PCB
FFC (CSM446-LD5M)
LK-125