Read Sharp AL-840 (serv.man5) Service Manual online
No.
Parts
Model
Note
Name
Function/Operation
1
Copy image mode select
key/Copy image mode
display lamp
key/Copy image mode
display lamp
Selects the copy image mode in auto,
character, photo, toner save mode. Displays
the copy image mode.
character, photo, toner save mode. Displays
the copy image mode.
2
Copy density adjustment
key/Copy density level
display lamp
key/Copy density level
display lamp
Selects the copy density. Used to set the
power save mode. Displays the copy density
mode (level).
power save mode. Displays the copy density
mode (level).
3
Developer cartridge
warning lamp
warning lamp
Turns on or blinks to show that the consumable
part (developer cartridge) must be replaced.
part (developer cartridge) must be replaced.
Turns on when there is little toner, and
blinks when there is no toner to disable
printing.
blinks when there is no toner to disable
printing.
4
OPC cartridge warning
lamp
lamp
Turns on or blinks to show that a consumable
part (developer cartridge, OPC cartridge) or
that there is a paper jam.
part (developer cartridge, OPC cartridge) or
that there is a paper jam.
At 19,000 print, the lamp lights up to
show the life is up. At 20,000 print, the
lamp lights up to disable printing.
show the life is up. At 20,000 print, the
lamp lights up to disable printing.
5
Paper jam warning lamp
Turns on or blinks when there is a paper jam.
6
Copy magnification ratio
select key/Copy
magnification ration display
lamp
select key/Copy
magnification ration display
lamp
Selects the copy magnification ratio.
7
Zoom mode display lamp
Turns on when the zoom key is used to set the
coy magnification ratio.
coy magnification ratio.
8
Copy magnification display
key
key
Used to display the copy magnification ratio set
by the zoom key on the value display.
by the zoom key on the value display.
9
Value, code display LED
Displays the value information (copy quantity,
copy magnification ratio, etc.) and codes (error
code, test command code and its information).
copy magnification ratio, etc.) and codes (error
code, test command code and its information).
10
On-line lamp
Turns on during operation in the printer mode.
(Print data is received from the host in the
printer enable state or during printing.)
(Print data is received from the host in the
printer enable state or during printing.)
11
Pre-heat mode display
lamp
lamp
Blinks in the pre-heat mode.
12
Zoom key
Sets the copy magnification ratio in the range
of 50%
of 50%
∼
200% by the increment of 1%.
13
Value setting key
Used to input various set values (copy quantity,
test command setting, power save mode
setting, etc.). Used to set the power save mode.
test command setting, power save mode
setting, etc.). Used to set the power save mode.
14
Clear key
Cancels various setting and operations.
15
Start key
Starts operations and stores various set data.
Ready lamp
Turns on when in print ready state.
B. Internal parts
(1) Parts in each section
a. Operation section
No.
Parts
Model
Note
Name
Function/Operation
1
Operation control PWB
Displays various number information and
messages. Outputs the key operation signal.
messages. Outputs the key operation signal.
2
Number display
Displays various value information and
messages.
messages.
1)
2)
5 – 3
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