Digital Equipment LA600 MultiPrinter User manual

LA600 MultiPrinter
Field Service Manual
Order No.: ER-LA600-SV
The information in this document is subject to change without notice and should not be construed as
a commitment by Digital Equipment Corporation. Digital Equipment Corporation assumes no
responsibility for any errors that may appear in this document.
Copyright © by Digital Equipment Corporation 1994.
All rights strictly reserved. Reproduction or issue to third parties in any form is not permitted without
written authorization from the publisher.
Pub. No. 5112 991 12932
November 1994

LA600 Field Service Manual
Table of Contents
1. Safety Precautions ..................................... 1-1
2. Preventive Actions for Keeping the Printer Running ........... 2-1
3. Procedures for Removal and Reassembly ................... 3-1
Housing ............................................. 3-2
Printer Engine LA600 .................................... 3-4
PSU-40A Assy ........................................ 3-6
DEV-40 LA600 Assy .................................... 3-8
CU-40 LA600 Assy .................................... 3-10
EEPROM CU-40-00 .................................... 3-12
Operator Panel ....................................... 3-14
Power ON/OFF Switch Assy .............................. 3-16
Cable Print Head Assy .................................. 3-18
Encoder Strip Assy .................................... 3-20
Kit Lubrication Felt ..................................... 3-22
Print Head H-Encoder 40A ............................... 3-24
Horizontal Motor 40A ................................... 3-26
Carriage 40A Assy ..................................... 3-28
Protection Shield ...................................... 3-30
Ribbon Gear Assy ..................................... 3-32
Rep. Kit Ribbon Gear ................................... 3-34
Stepping Motor 7.5 DEG (Platen gap control) ................. 3-36
Stepping Motor 1.8 DEG (Vertical paper transport) ............. 3-38
Tractor Gear 40A ...................................... 3-40
Stacker Elements 40B Assy .............................. 3-42
Print Head LA600 ..................................... 3-44
Paper Run/In Detector Assy .............................. 3-48
Kit Pressure Roll FF1 ................................... 3-50
Kit Vertical Transport A40 ............................... 3-52
Minipitch Belt Stepper .................................. 3-52
Minipitch Belt Form Feed ................................ 3-52
Kit Belt Pulley 40A ..................................... 3-54
Kit Cont. Forms Exit 40A ................................ 3-56
Kit Tractor 40A ....................................... 3-58
Kit Belt Tension 40A ................................... 3-60
Kit ASF Levers ....................................... 3-62
Kit Torsion Spring D-Axis ................................ 3-64
Kit Screws and Springs ................................. 3-66
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LA600 Field Service Manual
4. Wearing Parts ........................................ 4-1
Platen Assy A1 ........................................ 4-2
ASF Pick-up Rollers ..................................... 4-6
5. List of Spares and Repairs .............................. 5-1
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LA600 Field Service Manual
1. Safety Precautions
1. Some of the maintenance procedures described in this section
require that the printers top housing is removed. This exposes
the internal working parts of the printer. During operating some
of these parts are potentially dangerous.
2. All replacement and cleaning procedures should be performed
with the printer switched OFF and the mains connector
disconnected.
3. Only recommended parts should be used to replace defective
parts. Details of field exchangeable parts, including part number
and service number are listed in Chapter 5 ’Spares and Repairs’.
4. Switch the printer OFF while connecting or disconnecting a
Personality Module, a Memory Card or a Colour Option.
5. Never print over the edges of paper or beyond the perforations of
fanfold paper, otherwise the print head can be damaged.
6. Never attempt to print with no paper loaded or no ink ribbon
installed in the printer
7. Put the printer in the STOP mode immediately a paper jam
occurs, using the START/STOP key at the Operator Panel.
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LA600 Field Service Manual
2. Preventive Actions for Keeping the Printer Running
The following points should be additionally checked on a service call.
Item Problem Remedial Action
Platen *) Paper feeding problems Remove platen and clean
surface thoroughly using
platen cleaner S/CP 09.
Paper input transport
rollers Paper feeding problems Disconnect mains cable, remove the ribbon, and
remove housing (see
chapter 3, Part: Housing).
Also remove the paper guide
secured with two green
screws. Clean all transport
rollers using platen cleaner
S/CP 09.
ASF *) Paper insertion problems Remove ASF cassette.
Clean pick-up rollers using
platen cleaner S/CP 09, and
check the paper handling of
the ASF cassette using a
few sheets of paper which
have to be transported
properly by manually rotating
the pick-up wheel of the
ASF-cassette.
*) Refer to Chapter 4 to check a necessary exchange of platen or pick-up rollers.
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LA600 Field Service Manual
3. Procedures for Removal and Reassembly
This chapter describes the removal procedures which are necessary for proper
handling of the spare parts and subunits of the printer.
Note:
All removal procedures consists of several steps indicated with a:
to show preparation and
⇒to indicate the main removal steps.
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LA600 Field Service Manual
Part: Housing DEC P/N: FD-W03RF-01
Part No: 5112 292 38200
REMOVAL
Disconnect mains cable
Remove the manual front insertion (A)
⇒Remove the front cover (B) resp. the ASF cassette(s) out of the
mounting slots (C)
⇒Swing cover (D) to its nearly upright position and remove it
⇒a) Remove the cover (E) by releasing the cover snap locks
(F) with a flat bladed screwdriver
b) To remove the cover (E) grasp it by the sides, raise the
front slightly, push the cover back until the metal snaps
are out of the slots at the rear of the printer and then lift
the cover
REASSEMBLING
Execute the REMOVAL procedure in reverse sequence
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LA600 Field Service Manual
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LA600 Field Service Manual
Part: Printer Engine LA600 DEC P/N: 29 31790-01.A01
Part No: 5112 292 62901
REMOVAL
Set the printer into "LOCAL MODE"
Disconnect the system interface cable
Remove the ribbon cartridge
Switch the printer off and disconnect the mains cable
⇒Remove all encasing parts
⇒Remove the personality module (A)
⇒Remove the plastic insert of the memory card
interface (B)
⇒Loosen screw (C)
⇒Remove screws (D)
⇒Disconnect the Device Electronic (E)
⇒Disconnect the Control Unit (F)
⇒Loosen the fixation screws of the power on
switch and remove it (G)
⇒Swivel the printer as shown in figure 2.
Note: For protection of the operator panel please use a part of the
packaging material of the new printer engine as support.
⇒Shift the entire Electronic Subassembly
to the left. (1)
⇒Swivel it in the direction towards you
and remove it from the printer
engine. (2)
REASSEMBLING
Unpack the new printer engine
Execute the REMOVAL procedure with the new printer engine in reverse
direction.
⇒Change the print head from the "old" printer engine into the "new"
one.
⇒Perform an AGC Adjust procedure
⇒Adjust the parameter "Paper In Adj." to the value indicated on
the field service instruction attached to the new printer engine.
⇒Perform "PRINT TEST 3" and check for proper operation of
the printer.
Note: Take a note of the value of the page counter (PGCNT) on the
FRU-label of the new printer engine.
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LA600 Field Service Manual
Figure 1
Figure 2 Value of PAPER-IN ADJ.:
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LA600 Field Service Manual
Part: PSU-40A Assy DEC P/N: FD-W02BY-01
Part No: 5112 292 38110
REMOVAL
Disconnect mains cable
Remove all encasing parts (see Part: Housing)
Loosen the two screws (A) securing the PSU-40A assy
⇒Lift the complete Power Supply Unit (PSU), using a screwdriver
⇒Disconnect plug (C)
⇒Remove clamp (D) and disconnect plug (B)
REASSEMBLING
Execute the REMOVAL procedure in reverse sequence
ATTENTION:
Do not touch the PSU board within min. 2 minutes after power OFF
Before exchanging the PSU, please check the fuse (F)
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LA600 Field Service Manual
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LA600 Field Service Manual
Part: DEV-40 LA600 Assy DEC P/N: 29-31791-01 A01
Part No: 5112 292 62921
REMOVAL
Disconnect mains cable
Remove all encasing parts (see Part: Housing)
⇒Loosen the two screws (A) and remove screw (B)
⇒Remove the DEV-40 LA600 Assy
a) while removing, DEV-40 LA600 assy (K) is automatically
disconnected from CU-40 LA600 assy (C)
b) disconnect all plug connections from the DEV-board:
- plug (D)
- plug (E)
- plug (F)
Reassembly
Execute the REMOVAL procedure in reverse sequence
Attention: Wire (L) has to be fastened by screw (B) as shown in Detail Z
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LA600 Field Service Manual
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LA600 Field Service Manual
Part: CU-40 LA600 Assy DEC P/N: 29-31792-01. A01
Part No: 5112 292 62991
REMOVAL
Disconnect mains cable
Remove all encasing parts (see Part: Housing)
Remove DEV-40 LA600 Assy (see Part: DEV-40 LA600 Assy)
⇒Remove if plugged in memory card (A)
⇒Remove the Personality Module after loosing the two
lockscrews (B)
⇒Disconnect plug (C) from CU-40 LA600 Assy and
remove CU-40 LA600 Assy
⇒Remove the EEPROM CU-40-00 (D) and plug it
into the new CU-40 LA600 assy.
Note: Pay attention, that EEPROM (D) is stuffed correct
position (pin marker (E))
Reassembly
Execute the REMOVAL procedure in reverse sequence
Note: Start the function ’Print Out’ and check ’Current Settings’
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LA600 Field Service Manual
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LA600 Field Service Manual
Part: EEPROM CU-40-00 DEC P/N: 29-31802-01. A01
Part No: 5112 208 07590
REMOVAL
Disconnect mains cable
Remove all encasing parts (see Part: Housing)
Remove DEV-40 LA600 Assy (see Part: DEV-40 LA600 Assy)
Remove CU-40 LA600 Assy (see Part: CU-40 LA600 Assy)
⇒Exchange the EEPROM CU-40-00 (D)
Note: Pay attention, that EEPROM (D) is stuffed correctly
position (pin marker (E))
Reassembly
Execute the REMOVAL procedure in reverse sequence
Note: Start the function ’Print Out’ and check ’Current Settings’
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