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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LA600 Field Service Manual
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LA600 Field Service Manual
Part: Operator Panel DEC P/N: FD-W00CU-01
Part No: 5112 292 38150
REMOVAL
Disconnect mains cable
Remove all encasing parts (see Part: Housing)
⇒Disconnect Operating Panel cable (A)
⇒Loosen the screw (B) located at the bottom of the Operating
Panel
⇒Remove the Operator Panel Assy
REASSEMBLING
Execute the Removal procedure in reverse sequence
Note: Remove the protection foil (C) from the Operator Panel installed
before mounting the housing
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LA600 Field Service Manual
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LA600 Field Service Manual
Part: Power ON/OFF Switch Assy DEC P/N: FD-W02B3-01
Part No: 5112 292 38820
REMOVAL
Disconnect mains cable
Remove all encasing parts (see Part: Housing)
Remove PSU-40A Assy (see Part: PSU-40A Assy)
⇒Loosen the two screws (A)
⇒Remove the power ON/OFF Switch Assy
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: Cable Print Head Assy DEC P/N: FD-W02Y2-01
Part No: 5112 292 38800
REMOVAL
Disconnect mains cable
Remove all encasing parts (see Part: Housing)
⇒a) Disconnect print head cable from the print head
b) Remove the noise reduction foam (A) from the cable channel
c) Clip the plastic support (B) from the print head carriage, by
first releasing clamps (C)
d) Disconnect the wire-to-wire connection (D) of the H-Encoder
Assy
e) Disconnect the colour option, if installed, incl.connector
f) Disconnect cable (E) from the interface connection board
g) Disconnect the print head cable from DEV-40 LA600 Assy
h) Remove the two plastic clips (F)
i) Remove the print head cable
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: Encoder Strip Assy DEC P/N: FD-W0417-01
Part No: 5112 292 37970
REMOVAL
Disconnect mains cable
Remove all encasing parts (see Part: Housing)
⇒Remove the two screws (A) (Detail Y)
⇒Remove the encoder strip 40A Assy (B)
REASSEMBLING
a) Move the carriage to the centre position
b) Execute the REMOVAL procedure in reverse sequence
Caution: Pay attention, that the Encoder Strip Assy is mounted in the
correct position by (Detail Z) and observe that the strip is
slipping under the first two steel noses visible from the
front side of the printer.
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LA600 Field Service Manual
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LA600 Field Service Manual
Part: Kit Lubrication Felt DEC P/N: 29-31804-01. A01
Part No: 5112 270 04541
REMOVAL
Disconnect mains cable
Remove all encasing parts (see Part: Housing)
Remove Encoder Strip Assy (see Part: Encoder Strip Assy)
Remove operator panel, but leave the interface cable connected
(see Part: Operator Panel)
⇒a) Remove the two springs (C)
b) Remove the upper guide rail (D)
⇒Exchange the lubrication felt (E). Insert the new felt with
flatten ear towards the operator panel
REASSEMBLING
Execute the REMOVAL procedure in reverse sequence
Caution: Pay attention that the encoder strip Assy is mounted in a
correct position (Detail Z) and observe that the strip is
slipping under the first two steel noses seen from the front
side of the printer
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LA600 Field Service Manual
Part: Print Head H-Encoder 40A DEC P/N: FD-W0290-01
Part No: 5112 292 43100
REMOVAL
Disconnect mains cable
Remove all encasing parts (see Part: Housing)
Remove encoder strip Assy (see Part: Encoder Strip Assy)
Remove the noise reduction foam (see Part: Cable Print Head
Assy)
⇒Remove the upper screws (A)
⇒Loosen the two screws (B) and remove the mounting
plate and the right side cover plate
⇒Move the Carriage Assy to the cutout (D)
⇒Remove the two screws (E) from the Carriage
Assy
⇒Disconnect the print head cable from the head
⇒Clip the plastic support (F) from the carriage
Assy and disconnect the wire-to-wire
connector (G)
H-Encoder/print head cable
⇒Remove the cable clamp from the carriage
⇒Remove the print head H-Encoder Assy
REASSEMBLING
Execute the REMOVAL procedure in reverse sequence
Note: Pay attention that the logic cable is fixed correctly by clamp (H)
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LA600 Field Service Manual
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LA600 Field Service Manual
Part: Horizontal Motor 40A DEC P/N: FD-W0396-01
Part No: 5112 292 37910
REMOVAL
Disconnect mains cable
Remove all encasing parts (see Part: Housing)
Remove DEV-40 Assy (see Part: DEV-40 LA600 Assy)
⇒a) Disengage the drive belt (A) from the drive wheel of the
horizontal motor by pressing the belt tension element (B),
which is located at the left side of the engine, upwards
b) Pull off the belt from the wheel
c) Disconnect the two pin motor cables (C) from the motors
connector (D)
d) Remove the two cables from the motor fixing plate (E)
e) Remove the horizontal motor Assy
REASSEMBLING
Execute the REMOVAL procedure in reverse sequence
Note: Pay attention that the cable installation is correct (Detail Y)
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LA600 Field Service Manual
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LA600 Field Service Manual
Part: Carriage 40A Assy DEC P/N: FD-W04JL-01
Part No: 5112 292 40940
REMOVAL
Disconnect mains cable
Remove all encasing parts (see Part: Housing)
Remove DEV-40 Assy (see Part: DEV-40 LA600 Assy)
Remove the encoder strip Assy (see Part Encoder Strip Assy)
Remove operator panel, but leave the interface cable connected
(see Part: Operator Panel)
Remove the cable print head Assy from the print head carriage
(see Part: Cable Print Head Assy)
⇒a) Remove the two guide rail springs (A)
b) Remove the upper guide rail (B)
c) Pull the lever (C) from the lock pin and remove the
lever
d) Release spring (F) and remove lever (G) inclusive
springs
e) Remove the screw (H). Push the shaft (I) including the
plastic segment (J) out towards the right hand side of
the chassis
Note: the PCC lever (J) can not be removed
f) Slide the carriage out of the guide rail
REASSEMBLING
Execute the REMOVAL procedure in reverse sequence
Note: Engage the plastic segment such, of the guide rail (J) that the
!marker (K) aligns with the marker (L) on the PCC gear (Detail
"Z").
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LA600 Field Service Manual
Part: Protection Shield DEC P/N: FD-W041W-01
Part No: 5112 292 38390
REMOVAL
Disconnect mains cable
Open top cover
Remove Ink Ribbon
Remove Platen
⇒Dismount protection shield (B) by loosening the two screws (A).
This can easily be done by inserting of a torx screwdriver of at
minimum 110 mm length through the holes (C) in the bottom
plate and the platen channel
REASSEMBLING
Execute the REMOVAL procedure in reverse sequence
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LA600 Field Service Manual
Part: Ribbon Gear 40B Assy DEC P/N: FD-W045W-01
Part No: 5112 292 63840
REMOVAL
Disconnect mains cable
Remove all encasing parts (see Part: Housing)
Remove DEV-40 Assy (see Part: DEV-40 LA600 Assy)
⇒Locate the Ribbon Gear 40B Assy (A)
⇒a) Loosen the cable (F) from the cable guide
b) Loosen the spring (B), remove lever (C) from (D)
c) Disconnect the 2 pin motor cable from the motor
connector (F)
d) Push the lock tab (E) and remove the Ribbon Gear 40B Assy
REASSEMBLING
Execute the REMOVAL procedure in reverse sequence
Note: Pay attention that the cable installation is correct (Detail Y)
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