Sharp MX-1800N (serv.man17) Service Manual ▷ View online
MX-1800N MAINTENANCE 9 – 4
The PM cycle means the replacement timing of periodic replace-
ment consumable parts which are required for maintaining the per-
formance.
The PM cycle is specified only for B/W output. For color output, it is
used as a reference value.
[Reason] Since the ratio of B/W to color differs depending on the
user's operation scene which varies every day, the PM cycle can-
not be specified in a certain cycle for color output.
Replacement of a PM item at the recommended life is performed
by the dealer's judgment or at PM call or at EM call.
Life end definition of a drum
When the drum counter exceeds the specified level of 100% black
output or 100% full color output, it is judged as life end.
However in practice, the number of rotations specifies quality
assurance policy of the tandem engine, where its wear cannot be
solely defined by the number of sheets but other operating condi-
tions including increased slip rotations depending on the ratio of B/
W to color and/or B/W printing in the color mode using the ACS.
The guaranteed number of rotations for the MX-1800 series drum
is 840K.
ment consumable parts which are required for maintaining the per-
formance.
The PM cycle is specified only for B/W output. For color output, it is
used as a reference value.
[Reason] Since the ratio of B/W to color differs depending on the
user's operation scene which varies every day, the PM cycle can-
not be specified in a certain cycle for color output.
Replacement of a PM item at the recommended life is performed
by the dealer's judgment or at PM call or at EM call.
Life end definition of a drum
When the drum counter exceeds the specified level of 100% black
output or 100% full color output, it is judged as life end.
However in practice, the number of rotations specifies quality
assurance policy of the tandem engine, where its wear cannot be
solely defined by the number of sheets but other operating condi-
tions including increased slip rotations depending on the ratio of B/
W to color and/or B/W printing in the color mode using the ACS.
The guaranteed number of rotations for the MX-1800 series drum
is 840K.
The drum life is affected by the number of sheets of one print job.
This is because the actual life is determined by rotations of the
drum. If the number of sheets of one print job is less than 2 sheets,
the number of rotations for page is increased. As shown in the fig-
ure below, therefore, the number of sheets of drum life varies
depending on the number of sheets of one print job.
As a reference of the drum life, "Life meter" can be checked with
SIM22-1 from the accumulated number of rotations of each drum.
"Life meter" indicates the remained life (%) of the drum with the
entire drum life as 100%.
(Example) If the used number of rotations is 588K:
This is because the actual life is determined by rotations of the
drum. If the number of sheets of one print job is less than 2 sheets,
the number of rotations for page is increased. As shown in the fig-
ure below, therefore, the number of sheets of drum life varies
depending on the number of sheets of one print job.
As a reference of the drum life, "Life meter" can be checked with
SIM22-1 from the accumulated number of rotations of each drum.
"Life meter" indicates the remained life (%) of the drum with the
entire drum life as 100%.
(Example) If the used number of rotations is 588K:
588 (K rotations) / 840 (K rotations) x 100 = 070 (%)
* For 100% full color output by the user, the life of the black drum
is 40K similarly to the life of the color drums.
Drum counter
Number of rotations of drum
B/W
Full color
B/W
Full color
Drum
80K
40K
840K rotations
840K rotations
Drum Life
0
50
100
150
200
0
1
2
Number of sheets of one print job
Drum
L
ife
(
-
K
p
ages)
Black Drum
Color Drum
MX-1800N MAINTENANCE 9 – 5
B. LSU
: Check (Clean, replace, or adjust according to necessity.) {: Clean : Replace
: Adjust ✩: Lubricate : Shift the position.
No.
Part name
Monochrome
supply/
Mechanical
parts
When
calling
80
K
160
K
240
K
320
K
400
K
480
K
560
K
640
K
720
K
800
K
~
1200
K
Remark
1
Dust proof glass
Mechanical
parts
parts
{
{
{
{
{
{
{
{
{
{
{
{
{
2
Cleaning base
1
2
MX-1800N MAINTENANCE 9 – 6
C. Developing section
: Check (Clean, replace, or adjust according to necessity.) {: Clean : Replace
: Adjust ✩: Lubricate : Shift the position.
No.
Part name
Monochrome
supply/
Mechanical
parts
When
calling
80
K
160
K
240
K
320
K
400
K
480
K
560
K
640
K
720
K
800
K
~
1200
K
Remark/Refer to
the Parts Guide.
Block/Item No.
(Only the
replacement parts
are described.)
Color supply
40
K
80
K
120
K
160
K
200
K
240
K
280
K
320
K
360
K
400
K
~
1200
K
1
Developer (BK)
Monochrome
supply
supply
2
DV blade N kit (BK)
(P/G No.: [22]-22)
3
DV side seal F (BK)
(P/G No.: [23]-26)
4
DV side seal R (BK)
(P/G No.: [23]-15)
5
Toner filter unit
(P/G No.: [22]-37)
6
Developer (C)
Color supply
7
Developer (M)
8
Developer (Y)
9
DV blade N kit (C/M/Y)
(P/G No.: [22]-22)
10
DV side seal F/R (C/M/Y)
(P/G No.: [23]-26,
[23]-15)
[23]-15)
11
Toner filter unit
(P/G No.: [22]-37)
12
Toner cartridge
(BK/C/M/Y)
(BK/C/M/Y)
Monochrome/
Color supply
Color supply
User replacement for every toner empty (or the specified traveling distance).
13
Bias pin/Connector
Mechanical
parts
parts
1,6,7,8
2,9
13
13
3,10
4,10
5,11
13
12
MX-1800N MAINTENANCE 9 – 7
D. Transfer section
: Check (Clean, replace, or adjust according to necessity.) {: Clean : Replace
: Adjust ✩: Lubricate : Shift the position.
No.
Part name
Monochrome
supply/
Mechanical
parts
When
calling
80
K
160
K
240
K
320
K
400
K
480
K
560
K
640
K
720
K
800
K
~
1200
K
Remark/Refer to
the Parts Guide.
Block/Item No.
(Only the
replacement parts
are described.)
1
Intermediate transfer
belt
belt
Mechanical
parts
parts
(P/G No.: [26]-3)
2
Primary transfer coat
roller
roller
{
{
{
{
{
{
{
{
/
(P/G No.: [27]-9,
[28]-27)
[28]-27)
3
Primary transfer blade
(P/G No.: [25]-19)
4
Belt drive gear
/
(P/G No.: [27]-13)
5
Primary transfer
conduction collar
conduction collar
(P/G No.: [27]-8,
[28]-25)
[28]-25)
6
Transfer drive roller
{
{
{
{
{
{
{
{
{
{
{
{
7
Transfer follower roller
{
{
{
{
{
{
{
{
{
{
{
{
8
Tension roller
{
{
{
{
{
{
{
{
{
{
{
{
9
Roller CL brush
10
Y auxiliary roller
{
{
{
{
{
{
{
{
{
{
{
{
11
Resist backup roller
12
Secondary transfer
belt
belt
/
(P/G No.: [30]-21)
13
Secondary transfer
roller
roller
/
(P/G No.: [30]-6)
14
Secondary belt drive
roller
roller
{
{
{
/{
15
Secondary belt tension
roller
roller
{
{
{
/{
16
Secondary belt
follower roller
follower roller
{
{
{
/{
17
Secondary transfer
idle gear
idle gear
/
(P/G No.: [29]-6)
18
Sensors (Process
control resist sensors)
control resist sensors)
{
{
{
{
{
{
{
{
{
{
{
{
19
Cleaner seal
20
Cleaner seal R
21
Transfer toner
reception seal
reception seal
5
1
4
21
12
17
10
8
8
7
7
6
15
16
14
15
13,17
16
4,6
10
2,5
11
9
3
13
11
9
14
2
3
20
19
