Tally T2150 SprintPro User manual

Maintenance Manual Matrix Printer
T2150
SprintPro
A PRODUCT FROM TALLYGENICOM
T2250
SprintPro
T2150S
SprintPro

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Table of contents
1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
2 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
2.1 Printer specifications . . . . . . . . . . . . . . . . . . . . . . . . 2-1
2.2 Interface specifications . . . . . . . . . . . . . . . . . . . . . . . 2-5
2.3 Paper specifications . . . . . . . . . . . . . . . . . . . . . . . . . 2-6
2.4 Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8
3 Functional description . . . . . . . . . . . . . . . . . . . . . 3-1
3.1 Electronic functions . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
3.2 Mechanical functions FAW . . . . . . . . . . . . . . . . . . . . . 3-2
3.2.1 Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
3.2.2 Pushbar position check . . . . . . . . . . . . . . . . . . . . . . . . 3-2
3.2.3 Pushbar positions . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
3.2.4 Single-sheet mode . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5
3.2.5 Changeover to tractor mode . . . . . . . . . . . . . . . . . . . . . 3-5
3.2.6 Changeover to AGA mode . . . . . . . . . . . . . . . . . . . . . . 3-5
4 Test functions, troubleshooting and maintenance . . . . . 4-1
4.1 Key functions when turning on the printer . . . . . . . . . . . . 4-1
4.2 Testmode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2
4.2.1 Rolling ASCII . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3
4.2.2 Interface test (Hex-Dump) . . . . . . . . . . . . . . . . . . . . . . 4-4
4.2.3 Setting the Form length (Formlen function) . . . . . . . . . . . . . . 4-5
4.2.4 Automatic Gap Adjustment (AGA function) . . . . . . . . . . . . . . 4-6
4.2.5 Paper handling (Paphand function) . . . . . . . . . . . . . . . . . . 4-6
4.2.6 Bidirectional parallel interface (CX-bid function) . . . . . . . . . . . 4-8
4.2.7 Line wrap (Wrap function) . . . . . . . . . . . . . . . . . . . . . . . 4-9
4.2.8 Beep at paper end (Sound function) . . . . . . . . . . . . . . . . . 4-9
4.2.9 Deactivate single sheet feeder (Single function) . . . . . . . . . . . 4-10
4.2.10 Settings for paper with dark back (Pap.back function) . . . . . . . . 4-10
4.2.11 Setting for printing copy paper (HvyForm function) . . . . . . . . . . 4-11
4.2.12 Reduced power in standby-mode . . . . . . . . . . . . . . . . . . . 4-11
4.3 Showon function . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-12
4.4 AGA test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-13
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4.5 Parallelism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-14
4.6 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-15
4.6.1 Problems with the print quality . . . . . . . . . . . . . . . . . . . . 4-17
4.6.2 Error messages via the display . . . . . . . . . . . . . . . . . . . . 4-18
4.6.3 Additional display messages . . . . . . . . . . . . . . . . . . . . . 4-19
4.6.4 Display Message “Hardware Alarm” . . . . . . . . . . . . . . . . . 4-20
4.7 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-22
4.7.1 Replacing the fuse . . . . . . . . . . . . . . . . . . . . . . . . . . 4-22
4.7.2 Cleaning the housing . . . . . . . . . . . . . . . . . . . . . . . . . 4-22
4.7.3 Cleaning the interior . . . . . . . . . . . . . . . . . . . . . . . . . 4-23
4.7.4 Platen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-23
4.7.5 Ribbon . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-24
4.7.6 Upper friction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-24
4.7.7 Carriage shafts . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-24
4.8 Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-25
5 Instructions for disassembly and assembly . . . . . . . . . 5-1
5.1 Replacing the casing parts . . . . . . . . . . . . . . . . . . . . . . 5-2
5.1.1 Replacing the upper part of casing . . . . . . . . . . . . . . . . . . . 5-2
5.1.2 Replacing the lower part of casing . . . . . . . . . . . . . . . . . . . 5-6
5.2 Replacing the print head . . . . . . . . . . . . . . . . . . . . . . . 5-8
5.3 Replacing the flap . . . . . . . . . . . . . . . . . . . . . . . . . . 5-10
5.4 Replacing the electronic components . . . . . . . . . . . . . . . 5-11
5.4.1 Replacing the main controller board (incl. casing) . . . . . . . . . . 5-11
5.4.2 Replacing the power supply . . . . . . . . . . . . . . . . . . . . . 5-12
5.4.3 Replacing the panel board . . . . . . . . . . . . . . . . . . . . . . 5-14
5.5 Replacing the FAW motor . . . . . . . . . . . . . . . . . . . . . 5-15
5.6 Replacing the paper transport motor . . . . . . . . . . . . . . . 5-16
5.7 Replacing incremental strip . . . . . . . . . . . . . . . . . . . . 5-17
5.8 Replacing the AGA sensor . . . . . . . . . . . . . . . . . . . . 5-18
5.9 Replacing timing station sensor . . . . . . . . . . . . . . . . . . 5-19
5.10 Replacing the home position sensor . . . . . . . . . . . . . . . 5-20
5.11 Replacing the printhead cable . . . . . . . . . . . . . . . . . . . 5-21
5.12 Replacing the ribbon drive . . . . . . . . . . . . . . . . . . . . . 5-22
5.13 Replacing the carriage . . . . . . . . . . . . . . . . . . . . . . . 5-23
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5.14 Replacing the carriage motor . . . . . . . . . . . . . . . . . . . 5-25
5.15 Replacing the printing bar . . . . . . . . . . . . . . . . . . . . . 5-26
5.16 Replacing the PE sensor . . . . . . . . . . . . . . . . . . . . . . 5-27
5.17 Replacing the Friction Drive . . . . . . . . . . . . . . . . . . . . 5-28
5.17.1 Replacing the friction drive shaft front . . . . . . . . . . . . . . . . 5-28
5.17.2 Replacing the lower friction . . . . . . . . . . . . . . . . . . . . . . 5-29
5.18 Replacing the tractor . . . . . . . . . . . . . . . . . . . . . . . . 5-30
5.19 Replacing the switch paper guide . . . . . . . . . . . . . . . . . 5-32
5.20 Replacing the paper transport . . . . . . . . . . . . . . . . . . . 5-33
5.20.1 Replacing the paper guide . . . . . . . . . . . . . . . . . . . . . . 5-33
5.20.2 Replacing driving shaft . . . . . . . . . . . . . . . . . . . . . . . . 5-34
5.21 Replacing the side plates . . . . . . . . . . . . . . . . . . . . . . 5-35
5.21.1 Replacing the left side plate (with FAW) . . . . . . . . . . . . . . . 5-35
5.21.2 Replacing the right side plate . . . . . . . . . . . . . . . . . . . . . 5-36
5.21.3 Replacing the proof spring . . . . . . . . . . . . . . . . . . . . . . 5-36
5.22 Assembling the FAW . . . . . . . . . . . . . . . . . . . . . . . . 5-37
6 Spare parts and schematics . . . . . . . . . . . . . . . . . 6-1
6.1 Printer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
6.1.1 Housing/Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2
6.1.2 General Arrangement – sheet 1 . . . . . . . . . . . . . . . . . . . 6-4
6.1.3 General arrangement – sheet 2 . . . . . . . . . . . . . . . . . . . . 6-6
6.1.4 Power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-8
6.1.5 Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-9
6.1.6 Panel board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-10
6.1.7 Head connection cpl. . . . . . . . . . . . . . . . . . . . . . . . . . 6-11
6.1.8 Recommended spare parts . . . . . . . . . . . . . . . . . . . . . . 6-12
6.2 Optional Tractor 2/3 . . . . . . . . . . . . . . . . . . . . . . . . . 6-13
6.2.1 Preparing the printer . . . . . . . . . . . . . . . . . . . . . . . . . 6-13
6.2.2 Installing the tractor 2 . . . . . . . . . . . . . . . . . . . . . . . . . 6-13
6.2.3 Installing the tractor 3 . . . . . . . . . . . . . . . . . . . . . . . . . 6-14
6.2.4 Paper specifications . . . . . . . . . . . . . . . . . . . . . . . . . . 6-15
6.2.5 Spare parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-16
6.3 Optional automatic sheet feeder front (ASF-F) . . . . . . . . . . 6-17
6.3.1 Preparing the printer . . . . . . . . . . . . . . . . . . . . . . . . . 6-17
6.3.2 Installing the ASF-F . . . . . . . . . . . . . . . . . . . . . . . . . . 6-17
6.3.3 Paper specifications . . . . . . . . . . . . . . . . . . . . . . . . . . 6-19
6.3.4 Spare parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-20
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6.4 Optional automatic sheet feeder rear (ASF-R) . . . . . . . . . . 6-22
6.4.1 Replacing the Friction Rolls . . . . . . . . . . . . . . . . . . . . . 6-22
6.4.2 Replacing the Discharge Axle . . . . . . . . . . . . . . . . . . . . 6-23
6.4.3 Renewing the Metal Paper Baffle with Guide Foil . . . . . . . . . . 6-24
6.4.4 Spare Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-26
6.5 Cutter cpl. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-28
6.6 Interface adapter, cpl. . . . . . . . . . . . . . . . . . . . . . . . . 6-30
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1Introduction
This Matrix Printer has been developed for daily correspondence purposes in the
office. It meets the highest possible technical standards, and with proper use, it
should provide many years of trouble-free operation.
High-performance print qualities as well as operation with fanfold paper and cut
sheets can be chosen.
The following print qualities are available:
Draft Print Quality (DPQ)
Copy Draft Print Qualitiy (CPQ)
Near Letter Quality (NLQ)
Letter Quality (LQ)
The electronic part controlled by a microcomputer operates the needle print head,
menu programming, and interface.
All elements of the printer control are arranged on printed circuit boards so that only
a few additional components are required such as
step motor for selection of paperpath or for automatic gap adjustment
DC-motor for carriage transport
step motor for paper feed
The following features and options will further enhance the printer’s capabilities:
push tractor 1 (front) (standard)
manual single sheet feeder (front) (standard)
automatic sheet feeder rear (ASF-R) (option)
automatic sheet feeder front (ASF-F) (option)
push tractor 2 (front) (option)
push tractor 3 (rear) (option)
We recommend the use of original accessores for our printers. The use of others
than original parts may reduce the performance of the printer and cause defects on
the printer. For errors caused by the use of others than original accessories, your
warranty become invalid.
Caution: Activities described herein must only be performed by specially trained
and qualified service personnel! Harmful voltages can be touched.
STOP
Introduction
1-1
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2 Specifications
2.1
Printer specifications
Printer system Serial impact matrix printer
Printhead with 24 needles ∅0.25 mm
bidirectional printing
Print speed and
character matrices
DPQ = Draft
(Data Print Quality) 500 cps / 10,0 cpi 12 x 12 600 cps / 12,0 cpi 12 x 10
750 cps / 15,0 cpi 08 x 08*
750 cps / 15,0 cpi 12 x 08
515 cps / 17,1 cpi 12 x 12
600 cps / 20,0 cpi 12 x 10
CPQ = Copy Draft
(Copy Print Quality) 225 cps / 10.0 cpi 24 x 12 270 cps / 12.0 cpi 24 x 10
340 cps / 15.0 cpi 16 x 08*
340 cps / 15.0 cpi 24 x 08
230 cps / 17.1 cpi 24 x 12
270 cps / 20.0 cpi 24 x 10
NLQ
(Near Letter Quality) 180 cps / 10.0 cpi 24 x 18 220 cps / 12.0 cpi 24 x 15
270 cps / 15.0 cpi 16 x 12*
135 cps / 15.0 cpi 24 x 12
155 cps / 17.1 cpi 24 x 18
180 cps / 20.0 cpi 24 x 15
LQ
(Letter Quality) 90 cps / 10.0 cpi 24 x 36 110 cps / 12.0 cpi 24 x 30
135 cps / 15.0 cpi 16 x 24*
135 cps / 15.0 cpi 24 x 24
155 cps / 17.1 cpi 24 x 18
180 cps / 20.0 cpi 24 x 15
* Epson emulation only: superscript, subscript, 15 cpi,
microscript and MTPL microscipt
Tab speed 50 inch/sec.
Print width Narrow printer 80 characters at 10 cpi
Wide printer 136 characters at 10 cpi
Character pitch 5 / 6 / 7,5 / 8.6 / 10 / 12 / 15 / 17.1 / 20 cpi
Character size
Height 3,32 mm (incl. descenders)
Width 2,19 mm, max. 2,43 mm
Specifications Printer specifications
2-1

Fonts
Standard Print qualities: Data Print Quality, Copy Draft
Quality, Near Letter Quality, Letter Quality Fonts:
Courier, Roman, Sans Serif, OCR-A, OCR-B (all
resident in NLQ und LQ)
Roman scalable, Sans Serif scalable (only in
LQ-2170 emulation);
DLL is standard, but not battery-buffered
Barcodes (standard) A 2/5 Matrix (default)
B 2/5 Industrial
C 2/5 Interleaved
D Code 11
E BCD Matrix
F Code 39
G Codabar
H EAN 8 (with HRI*)
I EAN 8 (without HRI)
J EAN 13 (with HRI)
K EAN 13 (without HRI)
L MSI/modified PLESSEY
M UPC A (with HRI)
N UPC A (without HRI)
O UPC E (with HRI)
P UPC E (without HRI)
Q Delta Distance (IBM)
R Code 128
SEAN128
Large Character Printing (LCP)
US-Postnet Barcode
Kix
Royal Mail Customer Barcode
* HRI = human readable index
Emulations
Standard – MTPL (Tally Printer Language)
– Epson LQ-2550/Epson LQ-2170
– IBM Proprinter XL24e/IBM XL24e + AGM
Optional on request
Resolution 60 to 360 dpi horizontal
90 to 360 dpi vertical
Print attributes in all
character pitches Double width, italics, right justification, shadowed, auto centered, double height, bold,
proportionally spaced, underlined, overlined,
superscript, subscript
scalable with special LQ-2170 fonts
Self-test – ASCII test
– Hex-dump
– Fault display
– Ribbon test
Printer buffer 64 KB max.
Panel LCD display, 2 x 16 digits
Printer specifications Specifications
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6 function keys:
– Online
– Setup
– 4 softkeys
Sound power level
Sound pressure level
LWAd ≤7.2 B(A)
(EN 27779, Print in highest print quality)
LPAm ≤55 dB(A)
(EN 27779, Print in highest print quality)
Continuous operation
Throughput (ECMA 132)
MTBF
MTTR
>26 000 pages/month DPQ
T2150/T2250: >430 pages/hour
T2150S: >400 pages/hour
>10 000 h; 25% DC
<15 min.
Mains voltage 120 V ±10%, 60 Hz, ±2%
230 V ±10% 50/60 Hz, ±2%
Power consumption
When Printing
with Sleepmode = On 40 W ≤10 W
Main fuse T2,5AH/250V
Approvals VDE/GS, cULUS Listing, FCC Class B, CE,
GOST, CCC (China), IEC 60950, Energy Star
MOU 3.0
Dimensions
Width
Height
Depth
Narrow printer Wide printer
424 mm 600 mm
300 mm 300 mm
399 mm 399 mm
Weight Narrow printer Wide printer
10.5 kg 13.2 kg
Paper feed
Feed speed
Feed first line (6 lpi)
T2150/T2250 T2150S
3.8 inch/sec 2.8 inch/sec
48 ms 60 ms
Reverse motion Up to max. form length (22 inch)
max. 1 inch for automatic single sheet feeder
Printhead gap
Standard Automatic gap adjustment
Paper transport
Standard – Tractor with parking position
– Manual single sheet via front insertion
(friction rollers)
Optional – Automatic single sheet feeder front and/or rear
(capacity: 50/80 sheets per feeder)
– Tractor 2 (front) and Tractor 3 (rear)
Service life
Printhead 250 millions /DPQ 12 x 12 Matrix
Ribbon Narrow printer 3.5 million characters/10 cpi Draft
Wide printer 5.0 million characters/10 cpi Draft
Specifications Printer specifications
2-3

Environmental conditions
Operation
Temperature +10° to +35°C
Rel. humidity 16 to 73%
Climate IEC 721-3-7, Class 7K1
Storage
Temperature -5° to +45°C
Rel. humidity 5 to 95%
Climate IEC 721-3-1, Class 1K3
Transport
Temperature -40° to +70°C
Rel. humidity 5 to 95%
Climate IEC 721-3-2, Class 2K4
Printer specifications Specifications
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2.2
Interface specifications
Parallel interface bidirectional
Type of data
transmission 8-bit parallel interface (Centronics compatible) IEEE-1284; Nibble mode
Transmission rate Max. 12 KHz
Signal status Low: 0.0 V to +0.4 V
High: +2.4 V to +5.0 V
Connection cable Material AWG no. 28 at least
Length up to 2.0 m
Twisted-pair cable with double-shield,
acc. IEEE Std 1284 – 1294
Interface connections Printer side: Amphenol 57-40360 (or compatible)
Cable side: Amphenol 57-30360 (or compatible)
Voltage supply of ex-
ternal devices on pin 18 U=+5 V ±10% I=0,5 A max.
Serial interface
Type RS232C interface
Synchronization Asynchronous
Transmission rate 600 bauds to 19,200 bauds
Signal status OFF (log. 1) -3 V to -15 V
ON (log. 0) +3 V to +15 V
Connection cable Length up to 15 m
Interface connections ITT Cannon connector
Series DB-9 S
Transmission protocol XON/XOFF, ENQ/STX, READY/BUSY,
Robust XON/XOFF, ACK/NAK, ETX/ACK
Capacity of data buffer 64 KB max.
Specifications Interface specifications
2-5

2.3
Paper specifications
Tractor 1 Continuous paper,
single part forms
Weight 60 to 120 g/m2
Width 76 to 254 mm (narrow printer)
76 to 420 mm (wide printer)
Form length 76 to 559 mm
Multi part forms
(to be tested
individually!)
Copies 1 + 5
Weight of original 45 to 65 g/m2
Weight of copies 45 to 56 g/m2
Weight of bottom sheet 45 to 65 g/m2
Thickness (max.) 0.6 mm
Width 76 to 254 mm (narrow printer)
76 to 420 mm (wide printer)
Form length 76 to 559 mm
Manual single
sheet feeder Single part forms
Weight 80 to 120 g/m2
Width 76 to 254 mm (narrow printer)
76 to 420 mm (wide printer)
Form length 76 to 305 mm
Multi part forms
(to be tested
individually!!)
Copies 1 + 5
Weight of original 50 to 60 g/m2
Weight of copies 45 to 56 g/m2
Weight of bottom sheet 50 to 60 g/m2
Thickness (max.) 0.6 mm
Width 76 to 254 mm (narrow printer)
76 to 420 mm (wide printer)
Form length 76 to 305 mm
Envelopes
Width 76 to 420 mm
Length 76 to 305 mm
Thickness 0.32 mm
Paper specifications Specifications
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Printing paper Recycling paper made of 100% waste paper (to DIN 19 309)
can be processed.
Set of forms Sets of forms may be used only if the top edge is bound. The
binding edge should be as soft as possible. A wavy binding
edge may hamper the smooth feeding of these sets. Multi-part
forms have to be inserted with the glued top facing down.
Multi-part forms should be tested for suitability.
Paper quality Light pulp paper of medium fine quality, paper bearing the
quality mark SM Post and photocopy paper are suitable for
use. Unsuitable are: satin-finisch or coated papers, imitation
art papers, and embossed papers.
Since paper as natural material reacts strongly to
environmental influences (e.g. humidity, temperature), the
place of storage should be selected carefully. We recommend
that this kind of paper should be tested extensively before
larger quantities are acquired.
Coloured
paper Should papers with a dark reverse side be used, these should also be tested for their functionality. Please pay attention to the
use of infrared reflecting colors, when acquiring these papers.
Specifications Paper specifications
2-7

2.4
Dimensions
pulltoopenpulltoopen
456/600
narrow printer/wide printer
Standard, closed
Left paper edge
1) Tractor 1
2) Tractor 2 and tractor 3 (options)
70
74
1)
2)
110
114
1)
2)
Right paper edge
minmin
Adjustable area:
Narrow printer: 266 /252
wide printer: 420 /406
1) 2)
1) 2)
Top view
Dimensions Specifications
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Tractor 3 (option)
Tractor 1
Tractor 2 (option)
300
294
150
265 Tear edge
Side view, left
Fanfold paper mode
300
399
185
100
254
Single sheet mode
300
175
228
217
217
Options:
ASF-F and ASF-R
Specifications Dimensions
2-9

300
370
385
Cutter version with
installed interface adapter
45
150
228
105
175
107
Wide 428
Narrow 321
67
47
Wide 463
Narrow 321
91 80
772
70
Top view withASF-F, ASF-R
and interface adapter
Dimensions Specifications
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3 Functional description
3.1
Electronic functions The control electronic consists of 8 different assemblies. These are:
Power supply
Control board including parallel and serial interface
Print head
Head connection
Panel board with LC display
Paper feed motor
Carriage motor
Motor FAW (AGA/paper tray selection)
CR
PE + TOF
SENSOR
Pushbar
position
check
SENSOR
CUTTER
AGA Timing
station
LF FAW
PRINT
HEAD
CONTROL BOARD
PANEL
POWER SUPPLY
X9
Functional description Electronic functions
3-1

3.2
Mechanical functions
FAW
3.2.1
Function The motor FAW controls the pushbar which is used to select the functions. After
switch-on, the carriage moves to the left-hand side of the printer and presses
against the seesaw lever, thus pushing the seesaw outwards. This causes the see-
saw to tilt, and the FAW motor proceeds to control paper tray selection.
The pushbar can execute 6 steps, each 5.5 mm apart. It engages with either the
gear shaft front, the gear shaft rear or the friction front and rear. The gear shafts
control the position of the gears which are used to drive tractors 1, 2 and 3, sheet
feeder rear (ASF-R) and sheet feeder front (ASF-F) respectively.
3.2.2
Pushbar position check The home position sensor checks the position of the pushbar and, therefore, the se-
lected paper source. There is a position ruler located on the pushbar. After switch-
on, the photoelectric barrier in the home position sensor scans this ruler; it moves to
the next ridge edge and measures the width of the ridge. The position of the
pushbar is fed back to the firmware in this way.
Ridge 1 (narrow) Tractor 2
Ridge 2 Tractor 3
Ridge 3 Tractor 1
Ridge 4 (wide) Friction switched on (friction front
and rear)
3.2.3
Pushbar positions Possible pushbar positions:
The numbers in brackets in the following description of the pushbar positions are
items which can be found in chapter 6 Spare parts and schematics.
612 3
4
5
Trac2
Tr a c 3
Tr a c 1
Friction
ASF-F
Friction
ASF-R +
Single
1234
Ridge
Mechanical functions FAW Functional description
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