Technical Support - Vintage Products

All PDF documents require Adobe Acrobat Reader 5.0 or later.

Download the FREE Acrobat Reader.

Instruction Manuals and Sheets - Previous Products
Instructions for items previously manufactured or offered by Astro-Physics. We still carry many of the accessory items you may have purchased with previous versions of our products. You will find those items in the "Current Products" section.

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
  • 400QMD - Adjustments to Remove Declination Worm Gear Backlash (09-09-08) - PDF document
  • 400GTO with GTOCP2 Control Box (03-30-00) - PDF document
  • 400GTO - Adjustments to Remove Worm Gear Backlash (11-07-01)

• 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
  • 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

• 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
  • 900 German Equatorial Mount with Servo Motor Drive (900SMD) (12-30-98) - 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
  • Don't see your 900GTO Mount listed? Click here.

• 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
• 1200 German Equatorial Mount with Servo Motor Drive (1200SMD) (08-26-99) - 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
• Don't see your 1200GTO Mount listed? Click here.


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


• GTO Keypad Manuals
• GTO Keypad Controller, Version 2.6 (01-06-00) - PDF document
• GTO Keypad Controller, Version 3.0x (09-24-01) - PDF document
• Addendum to Manual: GTO Keypad Controller, Version 3.0x (10-29-01)
• GTO Keypad Controller, Version 3.2 (11-18-03) - PDF document.

Back to top

• 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)

Back to top

Please see the list of accessory instructions for your telescope under the "Current Products" section.

• Giant Binocular Viewer from Baader Planetarium (03-30-01)


• Collimating the Giant Zeiss/Baader Planetarium Binocular Viewer (08-16-01)