Mechanical Section - Hitachi HT-4139-28 Maintenance Manual

2.3 Mechanical Section

Paper feeding mechanism and paper scanning mechanism are show in the figure below.
I/L S e n s o r
1.Transport
E je c t M o to r
P C 4 1 S e n s o r
T 8 R o lle r
T7 R o lle r
T6 R o lle r
C C D 1
T 5 R o lle r
T 4 R o lle r
C C D 2
4.Scanner(Back)
１． Paper Feeding mechanism
Paper Feeding mechanismdrives rollers by the belt of the Stepping motor
(T1,Main,Eject,Brake) and sensors (PC20,21,31,41,42,43) are installed to control the level of
sheets.
２． Hopper Mechanism
Hopper has a swing mechanism by the hopper motor. Its stroke is 55mm. Detection of vertical
position is controlled by the sensor
３． Stacker Mechanism
Stacker Mechanism is a free fall type. Two stackers are equipped in the device and sheets are
ejected to two trays separately by switching gate. Ejecting speed is controlled by the stepping
motor so that the ejected papers are aligned.
４． Scanning Mechanism
Scanning Mechanism consists of the CCD which has the CCD Sensor, Mirror, and Fluorescent
Lamp) and two sets are equipped, one for front and the other for back side.（28 type has one
mechanism for the front side.）
５． Sheet Separator
To feed a single paper for scanning from stack in the Hopper, it consists of Pick Roller,
Separator Roller, and Reverse Roller.
６． Imprint Mechanism
Dot impact printer type is installed for the Imprinting mechanism.
７． Multiple Feed Detection Mechanism
８． Two mechanisms for the dual feed detection are installed in the device, Ultra Sonic Sensor type
and transmitted light type (PC22 Sensor).
G a te S o le n o id
T 1 0 R o lle r
P C 4 2 S e n s o r
P la te n R o lle r
T 9 R o lle r
P C 4 3 S e n s o r
T 11 R o lle r
Im p rin tin g h e a d
R ib o n M o to r
6.Imprinting
4.Scanner(Front)
P C 2 2 S e n s o r
P C 2 1
S e n so r
T 2 R o lle r T 1
P C 3 1
T 3 R o lle r
S e n so r
M irro r M o to r2 M a in M o to r
（F/L､L/L）.
T 1 2 R o lle r
P C 5 2 S e n so r
B ra k e M o to r
P C 5 1 S e n s o r
7.S/S Sensor
M irro r M o to r1
5.Pick･Separator
P C 11
U ltra so n ic P ick M o to r
S e n so r
S e n so r
S e p a ra to r R o lle r
F /L S e n so r
P ic k R o lle r
P C 2 0
R o lle r
S e n so r
R e ve rse
R o lle r
L /L S e n so r
H o p p e r M o to r
T 1 M o to r
3.Stacker
2.Hopper
-H2-3-