Thermo Scientific 20 GENESYS User manual

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GENESYS™ 20
SPECTROPHOTOMETER
SERVICE
MANUAL

GENESYS™ 20
SPECTROPHOTOMETER
SERVICE
MANUAL

Copyright © 1998-2002, Thermo Spectronic
All rights reserved.

i
NOTE
This service manual contains information, instructions, and specifications for the
GENESYS
20 spectrophotometer that were believed accurate at the time this
™
manual was written. However, as part of Thermo Spectronic’s on-going program of
product development, the specifications and operating instructions may be
changed from time to time. Thermo Spectronic reserves the right to change such
operating instructions and specifications. Under no circumstances shall Thermo
Spectronic be obligated to notify purchasers of any future changes in either this or
any other instructions or specifications relating to Thermo Spectronic products, nor
shall Thermo Spectronic be liable in any way for its failure to notify purchasers of
such changes.
FCC COMPLIANCE STATEMENT FOR U.S.A. USERS
This equipment generates, uses, and can radiate radio frequency energy, and if not
installed and used in accordance with the reference guide, may cause interference
to radio communications. It has been tested and found to comply with the limits in
effect at the time of manufacture for a Class A computing device pursuant to
Subpart J of Part 15 of FCC Rules, which are designed to provide reasonable
protection against such interference when operated in a commercial environment.
Operation of this equipment in a residential area is likely to cause interference in
which case the user at his own expense will be required to take whatever
measures may be required to correct the interference.

ii
NEW PRODUCT WARRANTY
Thermo Spectronic instrumentation and related accessories are warranted against
defects in material and workmanship for a period of three (3) years from the date of
delivery.
This warranty covers all parts and labor, and applies only to equipment which has
been installed and operated in accordance with the operator's instruction manual
and which has been serviced only by authorized Thermo Spectronic dealers or
service personnel. This warranty does not apply to equipment and accessories that
have been modified or tampered with in any way, misused, or damaged by
accident, neglect, or conditions beyond Thermo Spectronic's control.
Thermo Spectronic is not responsible under this warranty for loss in operating
performance due to environmental conditions.
THIS WARRANTY IS IN LIEU OF ALL WARRANTIES EXPRESSED, IMPLIED,
OR STATUTORY, INCLUDING, BUT NOT LIMITED TO, WARRANTIES OF
FITNESS FOR A PARTICULAR PURPOSE OR MERCHANTABILITY OR
OTHERWISE, and states Thermo Spectronic’s entire and exclusive liability and the
Customer's exclusive remedy for any claim in connection with the sale or furnishing
of services, goods, or parts, their design, suitability for use, installation, or
operations. Thermo Spectronic will in no event be liable for any direct, indirect,
special, or consequential damages, whatsoever, including loss of goodwill, whether
grounded in tort (including negligence), strict liability or contract, and Thermo
Spectronic's liability under no circumstances will exceed the contract price for the
goods and/or services for which liability is claimed.
UPDATE POLICY
Thermo Spectronic may, from time to time, revise the performance of its products,
and in doing so incur no obligation to furnish any such revisions to any Thermo
Spectronic customer.

GENESYS 20
Service Manual
Table of Contents
iii
Section 1
-
Description
Section 2 - Specifications
Section 3 - Installation and Performance Checks
Section 4 - Troubleshooting
4.1
Error Messages
............................................................
4 - 1
4.2
General Troubleshooting Items
................................................
4 - 3
Section 5 - Routine Maintenance
5.1
Lamp Replacement
.........................................................
5 - 1
5.2
Replace Fuse
..............................................................
5 - 4
Section 6 - Optical Description
Section 7 - Optical Alignment
7.1
Filter and Lens Assembly Alignment
............................................
7 - 2
7.1.1
Alignment Tool
.....................................................
7 - 2
7.1.2
Alignment Check
....................................................
7 - 2
7.1.3
Alignment Procedure
.................................................
7 - 3
Section 8 - Electrical Circuit Description and Adjustment
8.1
Primary Wiring
............................................................
8 - 1
8.2
Universal Input AC/DC Switching Power Supply Board
............................
8 - 2
8.3
Main Board
...............................................................
8 - 3
8.3.1
Digital Circuitry
.....................................................
8 - 3
8.3.2
Analog Circuitry
....................................................
8 - 4
8.4
Mono Drive Board
..........................................................
8 - 8
8.5
Detector Board
.............................................................
8 - 9

iv
Section 9 - Disassembly and Replacement
9.1
External Covers
............................................................
9 - 2
9.1.1
Lamp Door Assembly
................................................
9 - 2
9.1.2
Printer Cover
.......................................................
9 - 3
9.1.3
Cover Assembly
....................................................
9 - 3
9.1.4
Sample Compartment Cover Assembly
...................................
9 - 6
9.1.5
Rear Panel
.........................................................
9 - 8
9.2
Front Panel Assemblies
......................................................
9 - 9
9.2.1
Display
...........................................................
9 - 9
9.2.2
Key Pad
...........................................................
9 - 9
9.3
Internal Assemblies
........................................................
9 - 11
9.3.1
Main Circuit Board
.................................................
9 - 11
9.3.2
Power Entry Module
................................................
9 - 13
9.3.3
Power Supply
.....................................................
9 - 15
9.3.4
Detector Assembly
.................................................
9 - 17
9.3.5
Entrance Slit/Illumination Assembly
....................................
9 - 17
9.3.5.1
Lamp Socket
...............................................
9 - 18
9.3.5.2
Spring
....................................................
9 - 19
9.3.6
Filter and Lens Assembly
............................................
9 - 20
9.3.6.1
Filter Wheel
...............................................
9 - 21
9.3.6.2
Filter Wheel Motor
..........................................
9 - 22
9.4
Limit Switch
.............................................................
9 - 24
Section 10 - Accessories
Section 11 - Spare Parts and Special Tools
Section 12 - Drawings and Schematics
Section 13 - Update Information

GENESYS 20
Service Manual
List of Illustrations
v
Section 1
-
Description
Figure
1.1
-
GENESYS 20 Components
...........................................
1 - 2
Figure
1.2
-
Keyboard Layout
...................................................
1 - 3
Section 2 - Specifications
Section 3 - Installation and Performance Checks
Section 4 - Troubleshooting
Section 5 - Routine Maintenance
Figure
5.1
-
Lamp Compartment
.................................................
5 - 2
Figure
5.2
-
Removing Fuse Cover
...............................................
5 - 4
Figure
5.3
-
Remove and Replace Fuses
...........................................
5 - 4
Section 6 - Optical Description
Figure
6.1
-
Optical Path
.......................................................
6 - 1
Section 7 - Optical Alignment
Figure
7.1
-
Fabricated Alignment Tool
...........................................
7 - 2
Section 8 - Electrical Circuit Description and Adjustment

Outline
vi
Section 9 - Disassembly and Replacement
Figure
9.1
-
Cover Assembly: Side View
..........................................
9 - 2
Figure
9.2
-
Cover Assembly: Top View
...........................................
9 - 3
Figure
9.3
-
Base Assembly: Bottom View
.........................................
9 - 4
Figure
9.4
-
Connections to Main Board
...........................................
9 - 5
Figure
9.5
-
Sample Compartment Cover Assembly
..................................
9 - 6
Figure
9.6
-
Sample Compartment Cover Hinge Mounting
.............................
9 - 7
Figure
9.7
-
Connections to Main Board
..........................................
9 - 11
Figure
9.8
-
Main Circuit Board
................................................
9 - 12
Figure
9.9
-
Interior Layout
....................................................
9 - 14
Figure
9.10
-
Entrance Slit/Illumination Assembly
...................................
9 - 19
Figure
9.11
-
Filter and Lens Assembly
...........................................
9 - 21
Figure
9.12
-
GENESYS 20: Bottom View
.........................................
9 - 24
Section 10 - Accessories
Section 11 - Spare Parts and Special Tools
Section 12 - Drawings and Schematics
Section 13 - Update Information