FS-6020
1-5-10
(1-9) Error code F020 [F2] (main PWB RAM checksum error)
Detection conditions
Checksum in the standard RAM mounted on the main PWB or in optional expansion memory is not correct.
Corrective measures
Is expansion
memory added?
O[i
De
O[i
De
No
Replace the expansion memory.
(See page 1-3-8.)
* Use of memory produced by
Melco is recommended. (product
of which operation is guaranteed)
Replace the main PWB. (See
page 1-6-25.)
Remove the expansion
memory and turn on the power.
(See page 1-3-8.)
Replace the main PWB. (See
page 1-6-25.)
Start
* Possible defective locations
(causes)
• Main PWB
• Optional memory