Olivetti d-Color MF4003 Service Manual page 282

d-Color MF4003/MF3303
13.7 Memory/Storage Adjustment
13.7.1 Memory Check
• If the copy image is faulty.
• To check correspondence of data written to and that read from memory through write/read check.
• The following shows the memory names that correspond to each memory where check is made.
Memory area
WORK0 (main memory CPU board (CPUB) LPDDR4 main memory ChA/B
ch.A)
WORK0 (main memory CPU board (CPUB) LPDDR4 main memory ChA/B
ch.B)
Rough Check
• A check is made for each memory to see if the image data reading and writing are correctly made in a very limited area.
• This sequence is performed for all memories.
Typical rough check result display: Exemplary display when all memories have been checked okay
<Rough check procedure>
1. Touch [Memory Check] -> [Rough Check].
2. Press the Start key to start the check procedure.
NOTE
▪ The rough check procedure can be interrupted by pressing the Stop key.
3. The progress of the check sequence is displayed in percentage. (calculated based on all checks)
4. When the rough checks of all memories are completed, the diagnosis is finished automatically, and results are shown on the screen. (OK/
NG)
Detail Check
• A write check and a read check are repeated in all areas for each memory.
NOTE
▪ For a write check, a specific write value is set and the specific value is written in all areas of the memory and the written data
is thereafter read. This sequence is performed for all memories. (which forms one cycle of the check sequence)
▪ When one cycle of the check sequence is completed, the write value is changed automatically and a new check cycle is
performed. This sequence is repeated with the write value changed for each sequence.
▪ Unlike the rough check, the detail check is not automatically terminated. The check cycle is repeated until the Stop key is
pressed.
• The press of the Stop key will terminate the detail check.
<Detail check procedure>
1. Touch [Memory Check] -> [Detail check].
2. Press the Start key to start the detail check procedure.
3. The progress of the check sequence is displayed in percentage. (calculated based on all checks)
NOTE
▪ The check progress status display is 100% when one cycle of the check sequence is completed.
▪ The check progress status display is automatically reset to 0% and restarted as soon as a new check sequence is started.
4. When the check progress status display is 100%, the first check cycle is completed.
• The results are displayed on the screen. (The sequence has been checked okay, if NG does not appear.)
NOTE
▪ If a write/read error is detected, NG appears beside the memory display and the check sequence is automatically terminated.
5. Press the Stop key at any timing to terminate the detail check procedure.
If the results are NG:
NG memory area
WORK0 (main memory ch.A)
WORK0 (main memory ch.B)
Service Manual
Check the CPU board for connection or replace it with new one.
Check the CPU board for connection or replace it with new one.
I-66
I SERVICE MODE > 13. State Confirmation
Corresponding memory
Solution
Y119930-3