TECHNICAL SUPPORT

Astro-Physics
Technical Support - Legacy Products

All PDF documents require Adobe Acrobat Reader 5.0 or later.

Download the FREE Acrobat Reader.

Instruction Manuals and Sheets - Legacy Products
Instructions for items previously manufactured or offered by Astro-Physics. For items that we still offer, please search for the product on our Astro-Physics, Inc. website .

Refractors
German Equatorial Mounts
Mount Accessories Telescope Accessories

Technical Support for Current Products (will take you to a new web page)

Refractors

Care of Your Astro-Physics Refractor (9-4-14)

Focuser Pinion Adjustment (07-15-02) - PDF document - for most Traveler, 2.7" and 4" Focusers shipped prior to July 2001

Upgrade Legacy Telescopes with New Focusers

German Equatorial Mounts

If your mount is not listed, please know that we are adding additional instructions as they become available for the web. If your mount is a newer version GTO, please click here.

400 German Equatorial
- 400 German Equatorial Mount with Dual Axis Quartz Drive and Manual Control Knob (updated 08-07-07) - PDF document
- 400 German Equatorial Mount with Dual Axis Quartz Drive and Silver-Domed Knobs (01-22-94) - PDF document
- 400 German Equatorial Mount with Dual Axis Drive (400HDA) (09-27-94) - PDF document
- 400 German Equatorial Mount with Dual Axis Quartz Micro-Drive (400QMD) (04-25-95) - PDF document
- Installation of Encoders and Encoder Housings - 400 Mount - PDF document
- Using 10K-Step Mounted Shaft Encoders with JMI Digital Setting Circles - PDF document
- 400QMD - Adjustments to Remove Declination Worm Gear Backlash (09-09-08) - PDF document
- 400QMD - Greasing Manual - PDF document
- 400GTO with GTOCP2 Control Box (03-30-00) - PDF document
- 400GTO - Adjustments to Remove Worm Gear Backlash (11-07-01)
- 400GTO - Greasing-Manual - PDF document
600 German Equatorial with Tangent Arm
- 600 Model Mount with Dual Axis Stepper Motors and Tangent Arm (updated 08-07-07) - PDF document
600E German Equatorial
- 600E German Equatorial Mount with Dual Axis Stepper Motors and 8010 Hand Controller (updated 08-07-07) - PDF document
- 600E German Equatorial Mount with Dual Axis Quartz Drive (600EDA) (updated 08-07-07) - PDF document
- 600E German Equatorial Mount with Quartz Micro-Drive(600EQMD) (03-28-96) - PDF document
- 600E German Equatorial Mount with Servo Motor Drive (600ESMD) (08-11-98) - PDF document
- Installation of Encoders and Encoder Housings - 600E Mount - PDF document
- Using 10K-Step Mounted Shaft Encoders with JMI Digital Setting Circles - PDF document
- 600EGTO with GTOCP1 Control Box (11-19-98) - PDF document
- 600EGTO with GTOCP2 Control Box (03-03-00) - PDF document
- 600EGTO with GTOCP2 Control Box (07-20-01) - PDF document
- 600EGTO - Adjustments to Remove Worm Gear Backlash (11-07-01)
- 600EGTO - Lubrication/Maintanence Manual (07-28-09)
800 German Equatorial with Tangent Arm
- 800 German Equatorial Mount with Dual Axis Stepper Motors and Tangent Arm (800HDA) (updated 08-07-07) - PDF document
- 800 German Equatorial Mount Regrease Manual - PDF document

900 German Equatorial
- 900 German Equatorial Mount with Dual Axis Quartz Drive (900HDA) (08-07-95) - PDF document
- 900 German Equatorial Mount with Dual Axis Quartz Micro-Drive (900QMD) (09-10-96) - PDF document
- Adjusting 900QMD Backlash - (1-16-18) - PDF document
- 900 German Equatorial Mount with Servo Motor Drive (900SMD) (12-30-98) - PDF document
- Installation of Encoders and Encoder Housings - 900 Mount. Refer to the relevant mount manual.
- Using 10K-Step Mounted Shaft Encoders with JMI Digital Setting Circles - PDF document
- 900GTO with GTOCP1 Control Box (04-16-99) - PDF document
- 900GTO with GTOCP2 Control Box (04-04-01) - PDF document
- 900GTO with GTOCP2 Control Box (11-16-02) - PDF document
- 900GTO with GTOCP3 Control Box (11-04-05) - PDF document
- 900GTO with GTOCP3 Control Box (06-30-06) - PDF document - For mounts shipped starting in October, 2005 - Beginning with serial number 900451
- 900GTO with GTOCP3 Control Box (03-30-07) - PDF Document - For mounts shipped starting in January, 2007 - Beginning with serial number 900602
- 900GTO with GTOCP3 Control Box (05-01-08) - PDF Document - For mounts shipped starting in May, 2008 - Beginning with serial number 900706
- 900GTO with GTOCP3 Control Box (08-11-09) - PDF Document - For mounts shipped starting in August, 2009.
- 900GTO with GTOCP3 Control Box (12-06-11) PDF document - Most Recent Version for mounts shipped starting in November 2011 and all previous 900GTO mounts produced. We strongly recommend that ALL 900GTO owners adopt this version as their manual. Owners of older 900GTOs can benefit from all that we have learned over the years by using this manual. Information on accessories, the servo system and polar alignment will be of particular value. See page 3 for more information about this manual. Note that starting with this manual, the Astro-Physics GTO Servo Drive System has been given its own separate manual.
- Adjustments to Remove Worm Gear Backlash (Revised: 10-06-14)
- 900 Mount Base (Pier Adapter) Dimensions (06-13-08) - PDF Document
- Precision-Adjust Rotating Pier Adapter (900RPA) - Information and Instructions (03-30-06) - PDF document
- Removal of GTOCP1 control box (08-03-04) - PDF document
- Replacing the Latitude Adjuster of the 900 German Equatorial (02-01-06) - PDF document
- Clutch Plug Replacement for 900 or 1200 Mount (08-07-14) - PDF document
- 900GTO German Equatorial Mount - Useful Dimenions for Observatory Planning (10-04-05) - PDF document
- Troubleshooting and Repairing Your 900GTO or 1200GTO Servo "Y" Cable (GTOCP2 or 3 only) (11 -29-07) - PDF document
- Installing the Heavy-Duty Azimuth Adjuster Upgrade Kit for 900 Mounts (03-30-06) - PDF document
1200 German Equatorial

1200 German Equatorial Mount with Dual Axis Quartz Drive - Black, Metric (1200-Black) (05-23-94) - PDF document
1200 German Equatorial Mount with Dual Axis Quartz Drive (1200DA) (08-08-95) - PDF document
1200 German Equatorial Mount with Dual Axis Quartz Micro-Drive (1200QMD Bolted) (09-28-95) - PDF document
1200 German Equatorial Mount with Dual Axis Quartz Micro-Drive (1200QMD Dovetail) (10-02-96) - PDF document
Adjusting 1200QMD Backlash (8-16-07) - PDF document
1200 German Equatorial Mount with Servo Motor Drive (1200SMD) (08-26-99) - PDF document
Installation of Encoders and Encoder Housings - 1200 Mount. Refer to the relevant mount manual.
Using 10K-Step Mounted Shaft Encoders with JMI Digital Setting Circles - PDF document
1200GTO with GTOCP1 Control Box (06-14-01) - PDF document
1200GTO with GTOCP2 Control Box (02-25-02) - PDF document
1200GTO with GTOCP3 Control Box (07-13-04) - PDF document
1200GTO with GTOCP3 Control Box (02-08-05) - PDF document
1200GTO with GTOCP3 Control Box (03-30-07) - PDF document - For mounts shipped starting in May, 2006 - Beginning with serial number 1200572
1200GTO with GTOCP3 Control Box (07-07-07) - PDF document - For mounts shipped starting in July, 2007 - Beginning with serial number 1200723
1200GTO with GTOCP3 Control Box (01-08-10) - PDF document - For mounts shipped starting in December 2009 and through 2010.
1200GTO with GTOCP3 Control Box (06-22-11) - PDF document - Most Recent Version for mounts shipped starting in April 2011 and all previous 1200GTOs produced. We strongly recommend that ALL 1200GTO owners adopt this version as their manual. Owners of older 1200GTOs can benefit from all that we have learned over the years by using this manual. Information on accessories, the servo system and polar alignment will be of particular value. See page 3 for more information about this manual. Note that starting with this manual, the Astro-Physics GTO Servo Drive System has been given its own separate manual.

Adjustments to Remove Worm Gear Backlash (10-06-14) - PDF document
1200 Mount Base (Pier Adapter) Dimensions (07-17-08) - PDF document
Precision-Adjust Rotating Pier Adapter (1200RPA) - Information and Instructions (03-30-06) - PDF document
Removal of GTOCP1 control box (08-03-04)- PDF document
Replacing the Latitude Adjuster of the 1200 German Equatorial (2-6-06) - PDF document
Clutch Plug Replacement for 900 or 1200 Mount (08-07-14) - PDF document
1200GTO German Equatorial Mount - Useful Dimensions for Observatory Planning (08-01-05) - PDF document
Upgrade Replacement of 1200GTO Polar Forks S1200PF-B (06-22-04) - PDF document. Please note that these instructions apply to all 1200 mounts.
Installing the Heavy-Duty Azimuth Adjuster Upgrade Kit for 1200 Mounts (12AZKIT) (03-30-06) - PDF document
Troubleshooting and Repairing Your 900GTO or 1200GTO Servo "Y" Cable (GTOCP2 or 3 only) (11 -29-07) - PDF document
1200 Declination Hub Hole-pattern for attaching mounting plates (12-04-08 ) - PDF document

3600GTO German Equatorial

Unpacking the 3600GTO Mount (02-02-09) - PDF document.
3600GTO with GTOCP3 Control Box (05-31-11) - PDF Document - Current Version for mounts shipped starting in September 2010 and all previous 3600GTO mounts produced. Owners of 3600GTO mounts from the first production run may wish to download this manual even though there are some differences between the two production runs. Keep the old manual as an added reference. New information on accessories, the servo system and polar alignment will be of particular value. See page 3 for more information about this manual.
3600GTO with GTOCP3 Control Box (03-03-09) - PDF document - For mounts shipped starting in December, 2008 - Beginning with serial number 36003
3600GTO - Remeshing the Worm Gears

Mach1GTO German Equatorial

Mach1GTO with GTOCP4 Control Box (05-22-18) PDF document - Current Version for mounts shipped starting in May 2018 and all previous Mach1GTO mounts produced. We strongly recommend that ALL Mach1GTO owners adopt this version as their manual (note that some aspects may not apply to earlier versions of the mount). Owners of older Mach1GTOs can benefit from all that we have learned over the years by using this manual. Information on accessories, the servo system and polar alignment will be of particular value. See page 3 for more information about this manual. Note that the Astro-Physics GTO Servo Drive System has been given its own separate manual - see below.
Mach1GTO Auto-Adjusting Gearbox - No More Worm Meshing! (05-30-18) PDF document - For mounts with serial # M10803 and later. **Use this document for worm mesh information instead of the Gear Mesh page in printed manuals dated before February, 2017.**
Mach1GTO with GTOCP3 Control Box (08-14-14) PDF document - For mounts shipped starting in July 2014
Mach1GTO with GTOCP3 Control Box (08-05-11) PDF document - For mounts shipped starting in July 2011.
Mach1GTO with GTOCP3 Control Box (02-05-10) PDF document - For mounts shipped starting in February 2010.
Mach1GTO with GTOCP3 Control Box (05-05-09) PDF document - For mounts shipped starting in April, 2009.
Mach1GTO with GTOCP3 Control Box (02-21-08) PDF document - For mounts shipped starting in March, 2008.
Mach1GTO with GTOCP3 Control Box (03-30-07) PDF document - For mounts shipped starting in April, 2007.
Adjustments to Remove Worm Gear Backlash Serial # M10669 and Earlier (07-24-14) - PDF Document - For Mach1GTO mounts with serial # M10669 and earlier
Adjustments to Remove Worm Gear Backlash Serial # M10670 through # M10803 (10-24-14) - PDF document - For Mach1GTO mounts with serial # M10670 through # M10803.
Additional Backlash Issues that are NOT Caused by a Loose Mesh Between the Worm Gear and Worm Wheel (06-27-11) - PDF Document - These instructions apply to the Mach1GTO, 900GTO and 1200GTO and deal primarily with the set screw on the worm spur gear.
Tightening the Main Bearing Pre-load Retaining Ring of Your Mach1GTO (03-18-08) - PDF Document - For all Mach1GTO mounts produced.
Removing and Re-installing the Motor / Gearbox on your Mach1GTO (07-30-08) - PDF Document - For all Mach1GTO mounts produced prior to July 2014 (serial # M10670).
Re-packing your Mach1GTO in its Original Boxes (05-17-12) - PDF Document - For all owners who still have the original shipping containers.

GTOCP1 Servo Drive

GTO Control Box for Servo Drive, Model GTOCP1 (09-11-08) - PDF document

GTOCP3 Servo Drive

Astro-Physics GTO Servo Motor Drive System - Model GTOCP3 (10-2-15) PDF document

GTO Keypad Manuals

GTO Keypad Controller, Version 4.12 (11-18-03) - PDF document
GTO Keypad Controller, Version 4.17 - Addendum. (12-18-12) This is addendum to 4.12 manual that discusses v4.17 - PDF document

Mount Accessories

Instructions

Polar Alignment Telescope (PASILL2) (06-12-02) - PDF document. This model shipped from January 2001 through July 2002.
Polar Alignment Telescope (PASILL) (03-14-02) - PDF document. This is the original model which was shipped until January 2000.

Which polar alignment scope do I have?

Click here to find out.

Dimensions and Useful Information

Mounting Plate Fastener Chart (05-08-00)

Telescope Accessories

Please see the list of accessory instructions under the "Current Products" for more recent items.
Diagonals & Binoviewer

Giant Binocular Viewer from Baader Planetarium (03-30-01)
Collimating the Giant Zeiss/Baader Planetarium Binocular Viewer (08-16-01)

Imaging - Photo
These diagrams and instructions include adapters and other items that are no longer available.

Field Flatteners, TCCs & QuadTCC Imagaing Train Options (05-25-21)
13035FF Field Flattener Spacing Requirements (05-27-21)

This section of our website will be updated periodically. Our goal is to provide a wide range of instructions and information that will prove to be valuable to those who own our products as well as those who are considering the purchase of our products. We realize that we have only scratched the surface and look forward to incorporating additional instruction pages.

If you have further questions, or the answer you are looking for is not included in this section.
You may contact Astro-Physics' technical support staff at support@astro-physics.com.

Astro-Physics, Inc.
11250 Forest Hills Road, Rockford, IL 61115, U.S.A.
Phone: 815-282-1513 Fax: 815-282-9847