Apple Laserwriter 16.600 Ps Service Manual

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K Service Source

LaserWriter 16/600 PS

LaserWriter 16/600 PS

K Service Source

Basics

LaserWriter 16/600 PS

Basics Read Me First - 1

Read Me First

The LaserWriter 16/600 PS has the same form factor as the LaserWriter Pro 600/630, though some functions and parts are entirely different. If you want a detailed description of the new servicing issues presented by this printer, go to the document “New Servicing Issues” that is included on this CD. Below is a brief outline of this document.

New rear housing layout

– I/O controller easier to access

– D/C controller harder to access

– New I/O connectivity procedures

– Fax card option

– Internal hard drive option

Basics

Read Me First - 2

 

 

 

Faster engine

 

– Modules not backward-compatible

 

– Feeders not backward-compatible

 

– Two new fans for ventilation

 

– Slightly louder (52 dB vs. 49 dB printing)

 

New printer utilities

 

Advanced multi-platform performance

 

New printer diagnostic

 

 

 

 

 

 

 

 

Basics

Printer Utilities - 3

 

 

Printer Utilities

The printer utility that you use depends on the type of computer you use. This topic briefly describes the various utilities. Refer to chapters 3 and 4 of the user’s guide for complete information

Note: Settings made with any of these printer utilities become default parameters and affect all printed documents, regardless of the computer that originated the print request.

Basics Printer Utilities - 4

Apple Printer Utility for Macintosh Computers

The Apple Printer Utility for Macintosh computers works only with the LaserWriter 16/600 PS. You use this utility to set parameters that reside on the printer’s I/O controller board. You can use this utility to perform many functions, some of which are listed below.

– Naming the printer

– Initializing SCSI hard drives

– Downloading fonts

– Setting default printer resolution

– Setting default paper-handling options

– Setting default print density

– Printing configuration page

– Turning off the startup test page

– Setting communication protocols

Note: The LaserWriter Utility for Macintosh computers

Basics

Printer Utilities - 5

 

 

 

does not work with the LaserWriter 16/600 PS.

 

The Apple Printer Utility has a hierarchical interface that

 

is completely different than the LaserWriter Utility for the

 

Macintosh that serves other laser printers.

 

After you launch the Apple Printer Utility and select a

 

printer, a window opens that shows four headings. These

 

headings are like folders in the Finder. If you click an

 

arrow, the folder expands to show more items. The command

 

“Print Configuration Page” is located in the File menu in

 

the menu bar.

Basics

Printer Utilities - 6

 

 

LaserWriter Utility for Windows

The LaserWriter Utility for Windows has the same functions as the Apple Printer Utility for Macintosh computers, except for certain hard drive and font functions which are absent from the Windows printer drive interface.

NetWare Utilities

There are two DOS utilities, LWPMAN and LWFORM, that perform a subset of Apple Printer Utility functions in a NetWare environment.

TCP/IP Printer Configuration Utility for UNIX

To configure the printer from a UNIX environment, run the TCP/IP Printer Configuration Utility by using the Telnet program.

Basics

Paper Path - 7

 

 

Optional

* Envelope

Feeder (75)

Multipurpose

Tray (100)

Standard

Cassette (250)

Optional Sheet

Feeder (500)

Paper Path

There are four paper sources and one output tray in a complete system. The number in parenthesis is the capacity of the paper source.

Note: The asterisk at the point where the paper paths meet denotes a synchronization pause. See PS602 in “Sensing System Theory” in this chapter.

Basics

Mechanical Drive Theory - 8

 

 

M1

M2

M3

 

Mechanical Drive

M4

Theory

 

 

 

There are four motors and

 

four separate drive trains in

 

a complete system. Two are

 

in the printer engine and one

 

is in each of the optional

 

feeders.

 

• M1

Main Motor

 

• M2

Pickup Block Motor

 

• M3

Sheet Feeder Motor

 

• M4

Envelope Feeder

 

Motor

Basics

Mechanical Drive Theory - 9

 

 

Power

DC Controller Board

A

Supply

 

 

 

 

 

 

Connecting Cable

 

 

 

Main Motor

B

 

 

 

 

Drive Assembly

C

 

 

Toner Cartridge

D

Fuser Assembly

 

 

 

 

Gears/Rollers

Transfer Roller

E Delivery Roller Assy

 

 

 

Gears/Belt/Rollers

F G

M1 Main Motor Drive

The main motor powers the system that transports paper from the toner cartridge to the delivery tray on top of the printer.

Note: The letters next to the boxes correspond to the labels in the mechanical drive animations that are available on the CD.

Basics

Mechanical Drive Theory - 10

 

 

Power

DC Controller Board

A

Supply

 

 

 

 

Connecting Cable

 

 

Pickup Controller Board

H

 

 

 

Pickup Sensor Board

J

 

 

 

Pickup Block Motor

K

 

 

Pickup

 

 

Solenoids

 

 

 

Gear/Roller System

 

M2 Pickup Block Motor Drive

The pickup block motor powers the system that transports paper into the engine, through the pickup block, and up to the toner cartridge.

Note: The DC controller board does not connect directly to the pickup block motor. Make sure to troubleshoot the three intermediate blocks if there is a failure in pickup block drive.

Basics

Mechanical Drive Theory - 11

 

 

Power

Supply

ENGINE

SHEET FEEDER

Pickup

Solenoid

DC Controller Board

A

 

Connecting Cable

 

Pickup Controller Board

H

 

Connecting Cable

 

Controller Block

L

 

Feeder Controller Board

M

 

Sheet Feeder Motor

N

 

Gear/Roller System

 

M3 Sheet Feeder Motor Drive

The sheet feeder motor powers the system that transports paper from the 500-sheet cassette upward into the printer engine.

Note: Once the paper reaches the lower feed roller in the pickup block, engine components supply mechanical drive.

Apple Laserwriter 16.600 Ps Service Manual

Basics

Mechanical Drive Theory - 12

 

 

Power

Supply

ENGINE

ENV FEEDER

Pickup

Rollers

DC Controller Board

A

 

Connecting Cable

 

Pickup Controller Board

H

 

Connecting Cable

O

 

Connecting Cable

 

Feeder Controller Board

P

 

Envelope Feeder Motor

Q

 

Drive Assembly

 

Primary Feed Roller

 

Separation Drive Assy

 

M4 Envelope Feeder Motor Drive

The envelope feeder motor powers the system that separates envelopes and feeds them into the printer engine.

Note: Once an envelope reaches the upper feed rollers in the pickup block, engine components supply mechanical drive.

Basics

Sensing System Theory - 13

 

 

Sensing System Theory

There are six paper sensors, one dual-purpose sensor, and seven sensing switches in a LaserWriter 16/600 PS system:

Paper Sensors

– PS601: Cassette Paper Sensor

– PS602: Registration Paper Sensor

– PS701: Multipurpose Paper-End Sensor

– PS702: Multipurpose Paper-Present Sensor

– PS851: Sheet Feeder Paper-Present Sensor

– PS931: Envelope Paper-Present Sensor

– PS201: Delivery/Interlock Sensor

Sensing Switches

– SW601: Top Cover Interlock Switch

– SW603: Upper Cassette Size Sensing Switch

Basics

Sensing System Theory - 14

 

 

 

– •SW604: Upper Cassette Size Sensing Switch

 

– •SW605: Upper Cassette Size Sensing Switch

 

– •SW851: Lower Cassette Size Sensing Switch

 

– •SW852: Lower Cassette Size Sensing Switch

 

– •SW853: Lower Cassette Size Sensing Switch

Basics

Sensing System Theory - 15

 

 

Actuator

Paper Sensors

 

 

Paper sensors consist of an

Photointerrupter

actuator, a U-shaped photo

 

interrupter, and circuitry.

 

Sensors are tripped as the

 

actuator swings against

OPEN

movement of paper and

 

blocks the gap of the U. An

 

actuator can be passive

 

(governed by gravity) or

 

spring-loaded.

 

Note: Sensor failure can be

 

either mechanical or

 

electrical. When

 

troubleshooting sensors,

CLOSED

first confirm that the arm

 

Basics

Sensing System Theory - 16

 

 

 

or lever moves freely without snagging, that any springs are

 

applying correct resistance, and that the actuator is not

 

broken. Then check that all cable connections are secure. If

 

you have eliminated mechanical issues, proceed with

 

electrical troubleshooting.

Basics

Sensing System Theory - 17

 

 

Sensor

Holder

Assembly

PS601

Paper

Pickup Block

PS601

Cassette Paper Sensor

Actuator: A passive lever in the sensor holder assembly is tripped by insertion of a loaded cassette tray.

Basics

Sensing System Theory - 18

 

 

Sensor

Holder

Assembly

PS602

Paper

Pickup Block

PS602

Registration Paper Sensor

Actuator: A spring-loaded lever in the sensor holder assembly is tripped by arriving paper.

All paper stops at PS602 and waits for proper synchronization with drum rotation and mechanical drive.

Note: If paper does not reach sensor PS602 within the prescribed time after the pickup signal is issued, a

Basics

Sensing System Theory - 19

 

 

 

pickup unit delay jam exists and the controller stops

 

printing.

 

If paper reaches the sensor but does not clear it within the

 

correct time, a pickup unit stationary jam exists. The time

 

allowed for paper to clear is a function of paper size, which

 

is detected by PS701 (for manually fed paper) and by

 

sensing switches (for cassette-fed paper).

Basics

Sensing System Theory - 20

 

 

Pickup

Sensor

Board

PS702

Multipurpose PaperPresent Sensor

Actuator: A spring-loaded lever in the paper pickup block is tripped by the leading edge of paper as it is loaded in the multipurpose tray.

PS702

Paper

Pickup Block

Basics

Sensing System Theory - 21

 

 

Pickup

Sensor

Board

PS701

PS701

Multipurpose Paper-End Sensor

Actuator: A passive lever in the paper pickup block is tripped by the trailing edge of paper leaving the multipurpose tray.

Sensor PS701 detects the size of paper fed from the multipurpose tray.

Paper

Pickup Block

Basics

Sensing System Theory - 22

 

 

PS201

Delivery/Interlock Sensor

Actuator: A plastic tab on the fuser door and a sensing lever in the fuser assembly

Delivery/Interlock Sensor act independently to trip a photo interrupter.

PS201 detects two things: paper exiting the fuser and closure of the fuser door.

Note: If paper does not reach sensor PS201 within 5.2 seconds after it reached registration sensor J602, a delivery unit delay jam

Basics

Sensing System Theory - 23

 

 

 

exists and the controller stops printing.

 

If paper reaches the sensor but does not clear it within the

 

correct time, a delivery unit stationary jam exists. The

 

time allowed for paper to clear is a function of paper size,

 

which is detected by PS701 (for manually fed paper) and by

 

sensing switches (for cassette-fed paper).

Basics

Sensing System Theory - 24

 

 

PS851

Sheet Feeder PaperPresent Sensor

Actuator: A passive lever in the controller block is tripped by insertion of a loaded cassette tray.

PS851

Controller

Block

Basics

Sensing System Theory - 25

 

 

PS931

Envelope Feeder PaperPresent Sensor

Actuator: A spring-loaded lever is tripped by placement of envelopes into the feeder.

Basics Sensing System Theory - 26

Circuit Board

Sensing Switches

 

 

 

Sensing switches attach to a

Leaf Spring

circuit board and do not use

 

 

photo interrupters.

Microswitch

Switches are actuated by leaf

 

 

Actuator

 

springs that press inward as

Microswitch ON

you insert a cassette tray or

 

 

close the top cover.

 

 

 

 

Failure in sensing switches

 

 

can be either mechanical or

 

 

electrical. When

 

 

troubleshooting switches,

 

 

first confirm that the

 

 

actuator has not broken off

 

Microswitch OFF

and then confirm that the

 

 

leaf springs are not bent or

Basics

Sensing System Theory - 27

 

 

 

misshapen. You should be able to press the leaf spring with

 

your finger and hear the clicking of the microswitch.

 

If you have eliminated mechanical issues, proceed with

 

electrical troubleshooting.

Basics

Sensing System Theory - 28

 

 

Cover Interlock Arm

Cover Interlock Spring

Cover Interlock Actuator

SW601

Pickup

Controller

Board

Paper

Pickup Block

SW601

Top Cover Interlock Switch

Actuator: A tab on the top cover actuates a leaf spring and pin, which press the microswitch on the pickup controller board. See “Troubleshooting Tips” in Troubleshooting for information on defeating the top cover interlock switch.

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