Minolta Di 620 Manual page 181

Touch Panel Display
Input Image
Encoded Data
System
Comp./Expansion
Tech. Rep. Mode
Checks for correct copy image by writing data in the image input memory and
reading it out for exact correspondence when the copy image is defective.
Note: The Touch Panel shows the percentage of processing completed of
each diagnostic sequence and the number of diagnostic sequences
carried out. If a fault is encountered, it gives the message of "NG"
together with the address at which the fault occurred.
<Procedure>
1. Press the Start key to start the diagnostic sequence.
2. Press the Stop key to halt the sequence.
If an error (malfunction code) frequently occurs as a result of expansion fail-
ure, this function writes data to the page memory and reads it out to check for
exact correspondence.
Note: The Touch Panel shows the percentage of processing completed of
each diagnostic sequence and the number of diagnostic sequences
carried out. If a fault is encountered, it gives the message of "NG"
together with the address at which the fault occurred.
<Procedure>
1. Press the Start key to start the diagnostic sequence.
2. Press the Stop key to halt the sequence.
When the system performs an erratic operation, this function writes data to
the system memory and reads it out to check for exact correspondence.
Note: The Touch Panel shows the percentage of processing completed of the
diagnostic sequence. If the sequence has been completed okay, it
gives the message of "OK"; if a fault was encountered, it gives the mes-
sage of "NG" together with the address at which the fault occurred.
<Procedure>
Press the Start key to start the diagnostic sequence.
Note: The copier automatically stops as soon as it completes the diagnostic
sequence. The Stop key may, however, be pressed to halt the
sequence.
Comp.: If a compression/expansion error (malfunction code) occurs, this
function causes the CPU to write image data to the input page
memory, compress it to the encoder memory, and check the
image against a predetermined value.
Expansion: If a compression/expansion error (malfunction code) occurs, this
function causes the CPU to write image data to the input page
memory, compress it to the encoder memory, and expand it to the
output page memory. Then, it makes the CPU compare the
expanded image data with the original one.
Note: The Touch Panel shows the percentage of processing completed of the
diagnostic sequence. If the sequence has been completed okay, it
gives the message of "OK"; if a fault was encountered, it gives the mes-
sage of "NG" together with the corresponding malfunction code
(C12XX).
<Procedure>
1. Select either Comp. or Expansion.
2. Press the Start key to start the diagnostic sequence.
Note: The copier automatically stops as soon as it completes the diagnostic
sequence. The Stop key may, however, be pressed to halt the
sequence.
S-26
Function
Operation