Xerox 7700 User manual

Warning
The following servicing instructions are for
use by qualified service personnel only. To
avoid personal injury, do not perform any
servicing other than that contained in
operating instructions unless you are qualified
to do so.
This printing: November 2 1
71- 86 - 1
PHASER® 7700
COLOR PRINTER
Service Guide

User safety summary
Terms in manual: Various terms are used throughout this manual to either provide
additional information on a specific topic or to warn of possible danger that might
be present during a procedure or action. Be aware of all symbols and terms when
they are used, and always read NOTE, CAUTION and WARNING messages.
Terms on product:
Power source: For 11 VAC printers, Do not apply more than 127 volts RMS
between the supply conductors or between either supply conductor and ground.
Use only the specified power cord and connector. For 22 VAC printers, do not
apply more than 24 volts RMS between the supply conductors or between either
supply conductor and ground. Use only the specified power cord and connector.
Refer to a qualified service technician for changes to the cord or connector.
WARNING: If the product loses the ground connection, usage of controls and
other conductive parts can cause an electrical shock.
NOTE: A NOTE may indicate an operating or maintenance
procedure, practice or condition that is necessary to
efficiently accomplish a task.
A NOTE may also provide additional information related
to a specific subject or add a comment on the results
achieved through a previous action.
CAUTION: A CAUTION indicates an operating or maintenance
procedure, practice or condition that, if not strictly
observed, could result in damage to, or destruction of,
equipment.
WARNING: A WARNING indicates an operating, or maintenance
procedure, practice or condition that, if not strictly
observed, could result in injury or loss of life.
CAUTION: A personal injury hazard exists that may not be apparent.
For example, a panel may cover the hazardous area.
ANGER: A personal injury hazard exists in the area where you see
the sign.

Power Supply and Electrical Components: Before starting any service procedure,
switch off the printer power and unplug the power cord from the wall outlet. If
you must service the printer with power applied, be aware of the potential for
electrical shock.
Do not touch any electrical component unless you are instructed to do so by a service
procedure.
Mechanical Components: Manually rotate drive assemblies to inspect and gears.
Do not try to manually rotate or manually stop the drive assemblies while any
printer motor is running
Laser Components:
WARNING:This printer generates a laser beam as part of the printing process.
The laser beam in this printer is invisible. Direct eye exposure to the
laser beam may cause eye injury or blindness.
To avoid permanent eye damage, follow these directions:
■Before starting any service procedure, switch off the printer power and unplug
the power cord from the AC wall outlet.
■Do not disassemble the Laser Scanner Assembly.
■Use caution when you are working around the Laser Scanner Assembly or
when you are performing laser related troubleshooting or repair procedures.
■Never place a mirror or a reflective tool or object in the laser beam path.
■Do not disassemble the printer in such a way that the laser beam can exit the
print engine during a print cycle.

Fuser Components:
WARNING:This printer uses heat to fuse the toner image to a sheet of paper. The
Fuser Assembly is very hot. Switch off printer power and wait at
least 3 minutes for the Fuser to cool before you attempt to service
the Fuser Assembly or adjacent components.
Safety Components: Make sure covers and panel are in place and that all interlock
switches are all functioning correctly after you have completed a printer service
call. If you bypass, or cheat, an interlock switch during a service call, use extreme
caution when working on or around the printer.
Warning Labels: Throughout the printer, warning labels are displayed on
potentially dangerous components. When you service the printer, check to make
certain that all warning labels are in place.
Most importantly, read and obey all posted warning labels.
WARNING:Turning the power off using the On/Off switch does not de-energize
the printer. You must remove the power cord to disconnect the
printer from the main power source. Keep the power cord accessible
for removal in case of an emergency.
Safety instructions: Read all installation instructions carefully before you plug the
product into a power source.
Care of product: Disconnect the power plug by pulling the plug, not the cord.
■Disconnect the power plug if the power cord or plug is frayed or otherwise
damaged,
■Or if any liquid or foreign material is spilled into the case,
■Or if the printer is exposed to any excess moisture,
■Or if the printer is dropped or damaged,
■Or if you suspect that the product needs servicing or repair,
■And whenever you clean the product.
Ground the product: Plug the three-wire power cord (with grounding prong) into
grounded AC outlets only. If necessary, contact a licensed electrician to install a
properly grounded outlet.

Service safety summary
For qualified service personnel only: Refer also to the preceding Users Safety
Summary.
o not service alone: Do not perform internal service or adjustment of this
product unless another person capable of rendering first aid or resuscitation is
present.
Use care when servicing with power on: Dangerous voltages may exist at several
points in this product. To avoid personal injury, do not touch exposed
connections and components while power is on.
Disconnect power before removing the power supply shield, soldering, or
replacing components.
o not wear jewelry: Remove jewelry prior to servicing. Rings, necklaces, and
other metallic objects could come into contact with dangerous voltages and
currents.
Power source: This product is intended to operate from a power source that does
not apply more than 127 or 24 volts AC RMS (depending on printer model)
between the supply conductors or between either supply conductor and ground.
A protective ground connection by way of the grounding conductor in the power
cord is essential for safe operation.
CLASS 1 LASER PRO UCT
The Phaser® 77 Color Printer is certified to comply with Laser Product
Performance Standards set by the U.S. Department of Health and Human
Services as a Class 1 Laser Product. This means that this is a class of laser product
that does not emit hazardous laser radiation; this is possible only because the
laser beam is totally enclosed during all modes of customer operation.
The laser and output of the laser scanner unit produces a beam that, if looked
into, could cause eye damage. Service procedures must be followed exactly as
written without change.
When servicing the machine or laser module, follow the procedures specified in
the manual to avoid any hazards from the laser.
Laser (FDA): Any laser label visible to service must be reproduced in the service
manual with location shown or indicated. Safe working procedures and clear
warnings concerning precautions to avoid possible exposure must also be
included.

Federal Communications Commission Compliance
This equipment has been tested and found to comply with the limits set for a
Class B digital device, as stated in Part 15 of the FCC rules. These limits are
designed to provide reasonable protection against harmful interference in a
commercial installation. This equipment generates, uses, and may radiate radio
frequency energy. If not installed and used in accordance with the instructions
provided, this equipment may cause disruptive interference to nearby radio and
television communications. Even if the equipment is installed according to the
instructions, there is no guarantee of no interference in a particular installation. If
this equipment does cause disruptive interference to nearby radio and television
reception, switch the equipment off to determine if it is the true cause of the
interference. If the equipment is the cause of the interference, the user should try
to minimize the interference by taking one or more of the following courses of
action:
NOTE: Installation of the Finisher and/or the Token Ring Interface results in an
FCC classification change to Class A.
■Either re–orient or relocate the radio/television receiving antenna.
■Increase the separation between the equipment and the radio/television
receiver.
■Connect the equipment to an AC outlet that is not on the same circuit as the
radio/television receiver.
■If the previous solutions fail to bring results, you should consult either your
equipment dealer or an experienced radio/television technician.
For more information on interference, refer to the Federal Communications
Commission’s booklet “How to Identify and Resolve Radio-TV Interference
Problems”. This booklet is available from the U.S. Government Printing Office,
Washington D.C. 2 4 2, Stock No. 4- - 345-4.

Canadian Notice
This digital apparatus does not exceed the Class B limits for radio noise
emissions from digital apparatus as described in the radio interference
regulations of the Canadian Department of Communications.
NOTE: Installation of the Finisher and/or the Token Ring Interface results in a
classification change to Class A.
Avis Canadien
Cet appareil numerique est conforme aux limites émission de bruits
radioélectriques pour les appareils de classe B stipulés das le réglement sur le
brouillage radioéletrique du Ministére des Communcations du Canada.
European Notice
This equipment was tested and is determined to be compliant with VDE
requirements for a Class B device.
Hinweis
Hiermit wird bescheinigt, dass der Babe Laserdrucker, in bereinstimmung mit
den Betimmunngen der Vfg 1 4ß 984 funkenstört ist. Der Deutschen Bundespost
wurde das Inverkehrbringen dieses Gertëes angqeigt und die Berechtigung zur
berprufung der Serie auf Einhaltung der Bestimmungen eingeräumt.

ES Precautions
Some semiconductor devices are easily damaged from static electricity. These
components are Electrostatically Sensitive Devices (ESDs); examples include
integrated circuits (ICs), Large-Scale Integrated circuits (LSIs), some field-effect
transistors and semiconductor chip components. The following techniques reduce
the occurrence of component damage caused by static electricity:
CAUTION:Be sure the power is off to the chassis or circuit board, and observe all
other safety precautions.
■Immediately before handling any semiconductor components assemblies,
drain the electrostatic charge from your body by touching a known earth
ground. Alternatively, wear a discharging wrist strap device. (Be sure to
remove the strap before applying power to the unit under test to avoid
potential shock.)
■After removing an ESD-equipped assembly, place it on a conductive surface
such as aluminum foil or the static bag to prevent accumulation of an
electrostatic charge.
■Do not use freon-propelled chemicals. These can generate electrical charges
sufficient to damage ESDs.
■Do not remove a replacement ESD from its protective package until you are
ready to install it. Most replacement ESDs are packaged with leads that are
electrically shorted together by conductive foam, aluminum foil or other
conductive materials.
■Immediately before removing the protective material from the leads of a
replacement ESD, touch the protective material to the chassis or circuit
assembly into which the device is to be installed.
■Minimize body motions when handling unpackaged replacement ESDs.
Motion such as your clothes brushing together, or lifting a foot from a carpeted
floor can generate enough static electricity to damage an ESD.
■Handle ICs and EPROMs carefully to avoid bending a pin.
■Pay attention to the direction of parts when mounting or inserting them on a
PCB.

Service Quick Reference Guide - Table of Contents i
Contents
General Information 1-1
Phaser 7700 Prin er overview ..................................................................................1-2
Prin er RAM and prin er capabili ies ................................................................1-4
CRC life coun er behavior ................................................................................1-5
Prin Engine Con rol Boards and Power Supplies ............................................1-6
Auxiliary Feeder Con rol Board .......................................................................1-9
Prin Engine Sensors and Swi ches .................................................................1-10
Auxiliary Feeders Sensors and Swi ches ........................................................1-12
Prin Engine Solenoids, Ac ua ors and Clu ches ...........................................1-14
Image Processor Board ...................................................................................1-16
Assemblies of he Prin Engine .......................................................................1-17
Fron Panel Descrip ion .........................................................................................1-21
Rear panel ..............................................................................................................1-23
Specifica ions .........................................................................................................1-24
Suppor ed paper weigh s, page sizes and prin area .......................................1-27
Diagnostics, Error Codes and Messages 3-31
Error messages .......................................................................................................3-31
Troubleshoo ing Error Codes .................................................................................3-31
Sys em Boo Sequence ....................................................................................3-32
Power On Self Tes (POST) ............................................................................3-32
POST Faul s ....................................................................................................3-33
Faul Repor ing Devices .................................................................................3-33
LED Blink Pa erns .........................................................................................3-33
POST Diagnos ics Tes Descrip ions ..............................................................3-34
Service Diagnos ics .........................................................................................3-35
Service Diagnos ics Tes Menu Func ions ......................................................3-36
Error Codes and Messages Troubleshoo ing .........................................................3-47
Vol age Measuremen s ...........................................................................................3-47
Troubleshooting 3-85
Troubleshoo ing Power Supplies and In erlocks ...................................................3-87
Troubleshoo ing AC Power ............................................................................3-87
Troubleshoo ing he Low-vol age Power Supplies .........................................3-88
Troubleshoo ing he 3.3 VDC and 5 VDC LVPS ...........................................3-88

ii Phaser 7700 Color Laser Printer
Troubleshoo ing he 24 VDC LVPS .............................................................. 3-89
In erlock Circui Diagram .............................................................................. 3-90
The +24 VDC In erlock Circui ..................................................................... 3-90
The +5 VDC In erlock Circui ....................................................................... 3-91
Troubleshoo ing when he Prin er does no come o a “Ready” s a e ................... 3-92
Prin er does no hing when power swi ched on ............................................... 3-92
Fans on, Fron Panel LED never on .............................................................. 3-92
Fans on, Fron Panel LED is red, no Fron Panel message ........................... 3-92
Fron Panel con inually displays he Xerox Phaser 7700 splash screen ........ 3-92
Fron Panel con inually displays "warming up - please wai " message ......... 3-92
Fron Panel displays "Fa al Faul Encoun ered" message ............................. 3-92
Troubleshoo ing - Prin er comes o a “Ready” s a e ............................................. 3-93
False LH Door, RH Door, or Fron Door Open messages ............................. 3-93
False "Load Paper in Tray [1,2,3,4]" Message ............................................... 3-93
False "Tray [1,2,3,4] Missing" Message ........................................................ 3-93
Tray 1 will no lif .......................................................................................... 3-94
Tray 2, 3 OR 4 will no lif ............................................................................. 3-94
Tray 2, 3 AND 4 will no lif or
Prin er will no recognize he Auxiliary Feeder .................................................... 3-95
Prin er will no recognize he Finisher ........................................................... 3-95
Opera ion Sys em and Applica ion Problems ................................................ 3-96
Macin osh prin ing problems ......................................................................... 3-96
Windows prin ing problems ........................................................................... 3-96
Troubleshoo ing Ne work Problems .............................................................. 3-97
Media jams and he paper pa h .............................................................................. 3-98
Prin Image Quali y Problems ............................................................................ 3-101
djustments and Calibration 4-113
In ernal Hard Drive ...................................................................................... 4-113
Regis ra ion Con rol (RegiCon) Adjus men Overview ............................... 4-114
Processes of he RegiCon adjus men .......................................................... 4-117
RegiCon Flowchar ...................................................................................... 4-118
S ep 1: Bel Edge Learn ............................................................................... 4-119
S ep 2: RegiCon #4 Coarse Skew Adjus men ............................................ 4-120
S ep 3: RegiCon #1 Fine Skew Adjus men ................................................. 4-122
S ep 4: RegiCon #2 In/Ou Skew Adjus men ............................................. 4-123
S ep 5: RegiCon #3 Cen er Skew Adjus men ............................................. 4-124
Coarse RegiCon Ini ializa ion ............................................................................. 4-125
ATC Sensor Se up ........................................................................................ 4-127
Addi ional Informa ion ................................................................................. 4-127
Cleaning and Maintenance 5-129

Service Quick Reference Guide - Table of Contents iii
Service preven ive main enance procedure ..........................................................5-129
Recommended ools ......................................................................................5-129
Cleaning ........................................................................................................5-130
Resetting NVR M 6-131
Pos Scrip NVRAM Rese s ..................................................................................6-131
Service Diagnos ics NVRAM Rese s ..................................................................6-135
Pos Scrip NVRAM Rese ............................................................................6-135
Clear Tech Rep Faul s ...................................................................................6-135
Rese CRU Life Coun ers .............................................................................6-135
Rese Engine NVRAM .................................................................................6-136
S ore Engine NVRAM ..................................................................................6-136
Removal and Replacement Procedures 7-137
Rear Cover Assembly ............................................................................7-140
Righ Side Cover Assembly ..................................................................7-141
Top Cover Assembly .............................................................................7-142
Fron Panel Assembly ............................................................................7-143
Rear Cover, Top Rear Power Swi ch Cover and LH Rear Mid Cover ..7-144
Lef -Hand Lower Cover Assembly .......................................................7-146
Fron Cover Assembly ...........................................................................7-147
Fuser Fron Cover ..................................................................................7-148
Rear Shield ............................................................................................7-149
Rear Shield Bracke ...............................................................................7-150
24 VDC Power Supply Shield ...............................................................7-151
Mul i-Purpose Tray (MPT) Assembly ...................................................7-152
Mul i-Purpose Tray Paper Pick Rollers .................................................7-153
Lef -Hand Cover Assembly (Lef -Hand Door) .....................................7-154
Duplex Chu e .........................................................................................7-156
Duplex Uni Assembly ..........................................................................7-157
Transfer Roller Assembly (2nd BTR) ...................................................7-158
Duplex Transpor Assembly ..................................................................7-159
Fuser Uni ..............................................................................................7-160
Regis ra ion Transpor Assembly ..........................................................7-161
Shu er Solenoid Assembly ...................................................................7-162
Tray 1 Feeder Assembly and Paper Lif Mo or .....................................7-163
Was e Car ridge Sensor Holder .............................................................7-164
Prin Car ridge Pla e Cover ....................................................................7-165
Dispense Assembly ................................................................................7-166
Prin Car ridge Pla e Assembly .............................................................7-168
Developer Housing Assembly ...............................................................7-171
New Developer Housing Assembly Charging .......................................7-172

iv Phaser 7700 Color Laser Printer
Toner Dispense Mo or Assembly .......................................................... 7-174
S eering Drive Assembly ...................................................................... 7-175
Was e Toner Agi a or Mo or Assembly ................................................ 7-176
Mark-On-Bel (MOB) Sensor ............................................................... 7-177
Exi Transpor Assembly ....................................................................... 7-178
Fuser Fan Assembly .............................................................................. 7-179
Accumula or Bel Assembly ................................................................. 7-180
Bel Cleaner Assembly .......................................................................... 7-182
Was e Auger Assembly ......................................................................... 7-183
Laser Uni .............................................................................................. 7-184
Image Processor Board Assembly ........................................................ 7-186
In ernal Hard Drive ............................................................................... 7-187
Elec rical Chassis (Card Cage) Assembly ............................................. 7-188
Engine Con rol Board ........................................................................... 7-190
Engine Con rol In erface Board ............................................................ 7-191
T1 and T3 High-vol age Power Supplies .............................................. 7-192
3.3 VDC and 5 VDC Low-Vol age Power Supplies and Bracke ......... 7-194
LD Power Relay .................................................................................... 7-195
24 VDC Low-vol age Power Supply, Fan and Bracke ........................ 7-196
T2 High-Vol age Power Supply ............................................................ 7-197
Chassis AC Power Assembly ................................................................ 7-198
Main Drive Assembly ........................................................................... 7-199
Accumula or Bel Drive Assembly ....................................................... 7-200
Developer Drive Assembly ................................................................... 7-201
Prin Car ridge Drive Assembly ............................................................ 7-202
Tray 1 Paper-Selec Swi ches ................................................................ 7-203
Main Lever Assembly Righ and Lef -Hand Jacks ............................... 7-204
Auxiliary Feeder Covers ....................................................................... 7-206
Auxiliary Feeder Cover Assembly ........................................................ 7-207
High-Capaci y Feeder (HCF) Tray 3 .................................................... 7-208
High-Capaci y Feeder (HCF) Tray 4 and Paper Transpor ...................7-209
Auxiliary Feeder Con rol Boards .......................................................... 7-210
Auxiliary Feeders Mo or Assemblies .................................................... 7-211
Auxiliary Feeder Paper-Selec Swi ches ............................................... 7-212
Auxiliary Feeder Paper Feed Mo or Assembly ..................................... 7-213
Bracke Assembly, Lef -Hand and Righ -Hand Gear (HCF) ................ 7-214
FRU Parts List 8-215
PL 8-1 Accumula or Bel FRUs ................................................................... 8-216
PL 8-2 Lef -Hand Door FRUs ...................................................................... 8-217
PL 8-3 Media Trays FRUs ........................................................................... 8-218
PL 8-4 Duplex Uni FRUs ............................................................................ 8-219
PL 8-5 Cover FRUs ...................................................................................... 8-220
PL 8-6 Cover FRUs (con ’d.) ....................................................................... 8-221

Service Quick Reference Guide - Table of Contents v
PL 8-7 Cover FRUs (con ’d.) .......................................................................8-222
PL 8-8 Swi ch and Sensor FRUs ..................................................................8-224
PL 8-9 Swi ch and Sensor FRUs ..................................................................8-226
PL 8-10 Circui Boards FRUs .......................................................................8-228
PL 8-11 Power Supplies FRUs .....................................................................8-230
PL 8-12 Power Supplies FRUs .....................................................................8-232
PL 8-13 Mo ors/Drivers FRUs .....................................................................8-234
PL 8-14 Elec ropho ographic Componen s FRUs ........................................8-236
PL 8-15 Elec ropho ographic Componen s FRUs (con ’d.) .........................8-238
PL 8-16 Mul i-Purpose Tray FRUs ..............................................................8-240
PL 8-17 Paper Feed FRUs ............................................................................8-242
PL 8-18 Paper Feed FRUs (con ’d.) .............................................................8-244
PL 8-19 Fans .................................................................................................8-246
PL 8-20 Lif Componen s FRUs ...................................................................8-248
PL 8-21 Wiring FRUs ...................................................................................8-250
PL 8-22 Auxiliary Feeder FRUs ...................................................................8-252
PL 8-23 Lower Tray Deck (LTD) FRUs ......................................................8-254
PL 8-24 Lower Tray Deck (LTD) FRUs (con ’d.) .......................................8-255
PL 8-25 High-Capaci y Feeder FRUs ...........................................................8-256
PL 8-26 High-Capaci y Feeder FRUs (con ’d.) ............................................8-257
PL 8-27 High-Capaci y Feeder FRUs (con ’d.) ............................................8-258
PL 8-28 High-Capaci y Feeder FRUs (con ’d.) ............................................8-259
PL 8-29 High-Capaci y Feeder FRUs (con ’d.) ............................................8-260
Ki s ................................................................................................................8-261
Manual Packs & Service Manual ..................................................................8-262
Sof ware ........................................................................................................8-263
Supplies and accessories ...............................................................................8-263
Recommended Service Tools .......................................................................8-264
Test Prints 9-265
Analyzing he Tes Prin ...............................................................................9-266
Prin Color Tes Prin s ..................................................................................9-267
Diagnos ics Mode .........................................................................................9-269
Wiring Diagrams 10-273
Phaser 7700 Finisher 11-291
Finisher Overview ..............................................................................................11-292
General Informa ion ...........................................................................................11-293
Assemblies of he Finisher .................................................................................11-295
In ernal Assemblies of he Finisher ...................................................................11-296

vi Phaser 7700 Color Laser Printer
Horizon al Transpor Sensor, In erlock and Swi ch Loca ions ........................ 11-297
Finisher Sensor, In erlock and Swi ch Loca or Map ................................. 11-298
Finisher Sensor, In erlock and Swi ch Loca or Map .................................. 11-299
Removal and Replacement Procedures 11-301
Horizon al Transpor Assembly .......................................................... 11-302
Horizon al Transpor Top Open, Fron , and Rear Cover .................... 11-303
Horizon al Transpor En rance Upper Cover Assembly ..................... 11-304
Horizon al Transpor Bel s .................................................................. 11-305
Horizon al Transpor En rance Sensor and Top Tray Full Sensor ...... 11-306
Ga e-In Solenoid Assembly ................................................................ 11-307
Finisher Covers ................................................................................... 11-308
S ack Heigh -Sensor Assembly ........................................................... 11-310
S acker Paper-Sensor Assembly ......................................................... 11-311
Se Clamp Clu ch and Gear ................................................................. 11-312
Ejec Roll Assembly ............................................................................ 11-313
Finisher Con rol Board, Bracke and Shield ...................................... 11-314
S acker Mo or Assembly ..................................................................... 11-316
Paddle Shaf ........................................................................................ 11-317
Paper Transpor Mo or (Mo or Assembly Main) ................................ 11-318
Cam Bracke Assembly ....................................................................... 11-319
S aple Uni Assembly and Mo or ........................................................ 11-320
Compiler Tray ..................................................................................... 11-322
Finisher FRU Parts List 11-323
Finisher Wiring Diagrams 12-353

Service Quick Reference Guide - List of Tables vii
List of Tables
Table 1-1 CRC Life ......................................................................... 1-5
Table 1-2 Fron Panel Key Descrip ions........................................ 1-21
Table 1-3 Fron Panel Shor cu s .................................................... 1-22
Table 1-4 Rear panel DIP swi ch se ings...................................... 1-23
Table 1-5 Physical dimensions of prin er ...................................... 1-24
Table 1-6 Physical dimensions of lower ray feeder...................... 1-24
Table 1-7 Prin er Clearances.......................................................... 1-24
Table 1-8 Func ional specifica ions............................................... 1-25
Table 1-9 Elec rical specifica ions................................................. 1-25
Table 1-10 Environmen al specifica ions ...................................... 1-26
Table 1-11 Special y paper ............................................................ 1-28
Table 1-12 Prin area...................................................................... 1-28
Table 3-1 POST Diagnos ics Tes Descrip ions ............................ 3-34
Table 3-2 Service Diagnos ics Tes Menu Func ions .................... 3-36
Table 8-1 Accumula or Bel FRUs Lis ....................................... 8-216
Table 8-2 Lef -Hand Door FRUs Lis .......................................... 8-217
Table 8-3 Media Trays FRUs Lis .............................................. 8-218
Table 8-4 Duplex Uni FRUs Lis ................................................ 8-219
Table 8-5 Cover FRUs Lis .......................................................... 8-220
Table 8-6 Cover FRUs (con ’d.) Lis ........................................... 8-221
Table 8-7 Covers FRUs (con ’d.) Lis ......................................... 8-223
Table 8-8 Swi ch and Sensor FRUs Lis ...................................... 8-225
Table 8-9 Swi ch and Sensor FRUs Lis ...................................... 8-227
Table 8-10 Circui Board FRUs Lis ............................................ 8-229
Table 8-11 Power Supplies FRUs Lis ........................................ 8-231
Table 8-12 Power supplies FRUs (con ’d.) Lis .......................... 8-233
Table 8-13 Mo ors / Drivers FRUs Lis ....................................... 8-235
Table 8-14 Elec ropho ographic Componen s FRUs Lis ............ 8-237
Table 8-15 Elec ropho ographic componen s FRUs (con ’d.) Lis 8-239
Table 8-16 Mul i-Purpose Tray (MPT) FRUs Lis ...................... 8-241
Table 8-17 Paper feed FRUs Lis ................................................ 8-243
Table 8-18 Paper feed FRUs (con ’d.) Lis ................................. 8-245
Table 8-19 Fans Lis .................................................................... 8-247
Table 8-20 Lif Componen s FRUs Lis ...................................... 8-249

viii Phaser 7700 Color Laser Printer
Table 8-21 Wiring FRUs Lis ...................................................... 8-251
Table 8-22 Auxiliary Feeders FRUs Lis ..................................... 8-253
Table 8-23 Lower Tray Deck (LTD) FRUs Lis ......................... 8-254
Table 8-24 Lower Tray Deck (LTD) FRUs Lis (con ’d.)........... 8-255
Table 8-25 High-Capaci y Feeder FRUs ..................................... 8-256
Table 8-26 High-Capaci y Feeder FRUs Lis (con ’d.)............... 8-257
Table 8-27 High-Capaci y Feeder FRUs Lis (con ’d.)............... 8-258
Table 8-28 High-Capaci y Feeder FRUs Lis (con ’d.)............... 8-259
Table 8-29 High-Capaci y Feeder FRUs (con ’d.) ...................... 8-260
Table 8-30 Ki s ............................................................................ 8-261
Table 8-31 Manual Packs/Service Manual .................................. 8-262
Table 8-32 Sof ware .................................................................... 8-263
Table 8-33 Supplies ..................................................................... 8-263
Table 8-34 Accessories................................................................ 8-264
Table 8-35 Recommended Tools Lis .......................................... 8-264
Table 11-2 Finisher Specifica ions ............................................ 11-293
Table 11-3 Finisher Uni Main Assemblies............................... 11-325
Table 11-4 Finisher Covers ....................................................... 11-327
Table 11-5 Finisher S and.......................................................... 11-329
Table 11-6 Ga e Uni ................................................................. 11-331
Table 11-7 Horizon al Transpor Assembly .............................. 11-333
Table 11-8 Horizon al Transpor Assembly (con ’d.) ............... 11-335
Table 11-9 Top Cover and Ejec Roll........................................ 11-337
Table 11-10 Paper Transpor ..................................................... 11-339
Table 11-11 Paper Transpor (con ’d.) ...................................... 11-341
Table 11-12 S aple Uni Assembly............................................ 11-343
Table 11-13 Compiler Tray Assembly ...................................... 11-345
Table 11-14 S acker Eleva or Assembly ................................... 11-347
Table 11-15 Exi Assembly ....................................................... 11-349
Table 11-16 Elec rical................................................................ 11-351

Service Quick Reference Guide - List of Figures i
List of Figures
Figure 1-1 The 7700 Color Laser Prin er (w / High-Cap Feeder) .... 1-1
Figure 1-2 Engine Con rol In erface Board and Power Supplies ....1-6
Figure 1-3 Power Supplies ............................................................... 1-7
Figure 1-4 Prin Engine Con rol Boards ..........................................1-8
Figure 1-5 Auxiliary Feeder Con rol Board .................................... 1-9
Figure 1-6 Prin Engine Sensors and Swi ches .............................. 1-10
Figure 1-7 Prin Engine Sensors and Swi ches (con ’d.) ............... 1-11
Figure 1-8 Auxiliary Sensors and Swi ches ................................... 1-12
Figure 1-9 Auxiliary Feeder Ac ua ors and Clu ches .................... 1-13
Figure 1-10 Prin Engine Solenoids, Ac ua ors & Clu ches .......... 1-14
Figure 1-11 Prin Engine & Aux. Feeder In erlocks & Sensors ....1-15
Figure 1-12 Image Processor Board .............................................. 1-16
Figure 1-13 Assemblies of he Prin Engine .................................. 1-17
Figure 1-14 Assemblies of he Prin Engine (con ’d.) ................... 1-18
Figure 1-15 Assemblies of he Prin Engine (con ’d.) ................... 1-19
Figure 1-16 Auxiliary Feeder Assemblies ..................................... 1-20
Figure 1-17 Fron Panel ................................................................. 1-21
Figure 1-18 Prin er Rear Connec ions ...........................................1-23
Figure 3-1 Convenien Vol age Measuremen Poin Loca ions ..... 3-47
Fig 3-2 Fuser Connec or Pin Loca ions ......................................... 3-48
Figure 3-1 Circui Diagram ............................................................ 3-90
Figure 4-1 Coarse RegiCon Ini ializa ion .................................... 4-114
Figure 4-2 Coarse and Fine Skew Adjus men s ........................... 4-115
Figure 4-3 In/Ou Skew Adjus men ............................................ 4-115
Figure 4-4 Cen er Skew Adjus men ........................................... 4-116
Figure 4-5 RegiCon Flowchar .................................................... 4-118
Figure 4-6 Grid 1-Do pa ern orien a ion for A-size paper .........4-125
Figure 4-7 Grid 1-Do pa ern anno a ions .................................. 4-126
Figure 7-1 Rear Cover Assembly ................................................7-140
Figure 7-2 Righ Side Cover Assembly ....................................... 7-141
Figure 7-3 Top Cover Assembly .................................................7-142
Figure 7-4 Con rol Panel Assembly ............................................. 7-143
Figure 7-5 Top Rear Pwr Swi ch Cover and LH Rear Mid Cover 7-144
Figure 7-6 Lef -Hand Lower Cover Assembly ............................ 7-146

Phaser 7700 Color Laser Printer
Figure 7-7 Fron Cover Assembly ............................................... 7-147
Figure 7-8 Fuser Fron Cover ...................................................... 7-148
Figure 7-9 Rear Shield ................................................................. 7-149
Figure 7-10 Rear Shield Bracke ................................................. 7-150
Figure 7-11 24 VDC Power Supply Shield ................................. 7-151
Figure 7-12 MPT Assembly ........................................................ 7-152
Figure 7-13 Mul i-Purpose Tray Pick Rollers ............................. 7-153
Figure 7-14 Lef -Hand Cover Assembly (Lef -Hand Door) ........ 7-154
Figure 7-15 Damper Tee h Alignmen ........................................ 7-155
Figure 7-16 Duplex Chu e ........................................................... 7-156
Figure 7-17 Duplex Uni Assembly ............................................. 7-157
Figure 7-18 Transfer Roller Assembly (2nd BTR) ...................... 7-158
Figure 7-19 Inver er Transpor Assembly ................................... 7-159
Figure 7-20 Fuser Uni ................................................................. 7-160
Figure 7-21 Regis ra ion Transpor Assembly ............................ 7-161
Figure 7-22 Shu er Solenoid Assembly ...................................... 7-162
Figure 7-23 Tray 1 Feeder Assembly .......................................... 7-163
Figure 7-24 Was e Car ridge, Cover & Sensor Holder. ............... 7-164
Figure 7-25 Prin Car ridge Pla e Cover (plas ic) ........................ 7-165
Figure 7-26 Dispense Assembly .................................................. 7-166
Figure 7-27 Prin Car ridge Pla e Assembly ................................ 7-168
Figure 7-28 Prin Car ridge Pla e Assembly (con ’d.) ................. 7-169
Figure 7-29 Developer Housing Assembly ................................. 7-171
Figure 7-30 Developer Housing Assembly Recharge ................. 7-172
Figure 7-31 Toner Dispense Mo or Assembly ............................ 7-174
Figure 7-32 S eering Drive Assembly ......................................... 7-175
Figure 7-33 Was e Toner Agi a or Mo or Assembly. .................. 7-176
Figure 7-34 Mark-On-Bel Sensor ............................................... 7-177
Figure 7-35 Exi Transpor Assembly ......................................... 7-178
Figure 7-36 Fuser Fan Assembly ................................................. 7-179
Figure 7-37 Accumula or Bel Assembly .................................... 7-180
Figure 7-38 Bel Cleaner Assembly ............................................ 7-182
Figure 7-39 Was e Auger Assembly ............................................ 7-183
Figure 7-40 Laser Uni Assembly ................................................ 7-184
Figure 7-41 Laser Uni Label ...................................................... 7-185
Figure 7-42 Image Processor Board Assembly. .......................... 7-186
Figure 7-43 In ernal Hard Drive .................................................. 7-187
Figure 7-44 Elec rical Chassis Assembly .................................... 7-188
Figure 7-45 Engine Con rol Board .............................................. 7-190

Service Quick Reference Guide - List of Figures i
Figure 7-46 Engine Con rol In erface Board ............................... 7-191
Figure 7-47 T1 and T3 High-vol age Power Supplies ................. 7-192
Figure 7-48 3.3 VDC and 5 VDC Low-Vol age Power Supplies 7-194
Figure 7-49 LD Power Relay .......................................................7-195
Figure 7-50 Low-vol age Power Supply, Fan and Bracke .........7-196
Figure 7-51 T2 High-Vol age Power Supply ............................... 7-197
Figure 7-52 Chassis AC Power Assembly ................................... 7-198
Figure 7-53 Main Drive Assembly .............................................. 7-199
Figure 7-54 Accumula or Bel Drive Assembly .......................... 7-200
Figure 7-55 Developer Drive Assembly ...................................... 7-201
Figure 7-56 Prin Car ridge Drive Assembly ............................... 7-202
Figure 7-57 Tray 1 Paper-Selec Swi ches .................................. 7-203
Figure 7-58 Main Lever, Righ -Hand and Lef -Hand Jacks ........7-204
Figure 7-59 Auxiliary Feeder Covers .......................................... 7-206
Figure 7-60 High-Capaci y Feeder (HCF) Cover Assembly ....... 7-207
Figure 7-61 High-Capaci y Feeder (HCF) Tray 3 ....................... 7-208
Figure 7-62 High-Cap Feeder (HCF) Tray 4 & Paper Transpor 7-209
Figure 7-63 LTD Con rol or HCF Con rol Board ........................ 7-210
Figure 7-64 Transpor Mo or Assembly ...................................... 7-211
Figure 7-65 Paper-Selec Swi ches .............................................. 7-212
Figure 7-66 Paper Feed Mo or Assy. & Chu e (LTA & HCF) .... 7-213
Figure 7-67 Bracke Assembly, Gear RH & Gear LH (HCF) .....7-214
Figure 8-1 Accumula or Bel FRUs .............................................. 8-216
Figure 8-2 Lef -Hand Door FRUs ............................................... 8-217
Figure 8-3 Media Trays FRUs .....................................................8-218
Figure 8-4 Duplex Uni FRUs .....................................................8-219
Figure 8-5 Cover FRUs ................................................................ 8-220
Figure 8-6 Cover FRUs (con ’d.) ................................................. 8-221
Figure 8-7 Cover FRUs (con ’d.) ................................................. 8-222
Figure 8-8 Swi ch and Sensor FRUs ............................................ 8-224
Figure 8-9 Swi ch and Sensor FRUs ............................................ 8-226
Figure 8-10 Circui Boards FRUs ................................................ 8-228
Figure 8-11 Power Supplies FRUs .............................................. 8-230
Figure 8-12 Power Supplies FRUs (con ’d.) ............................... 8-232
Figure 8-13 Mo ors/Drivers FRUs ............................................... 8-234
Figure 8-14 Elec ropho ographic componen s FRUs .................. 8-236
Figure 8-15 Elec ropho ographic Componen s FRUs (con ’d.) ... 8-238
Figure 8-16 Mul i-Purpose Tray FRUs ........................................ 8-240
Figure 8-17 Paper Feed FRUs ..................................................... 8-242