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Apple Color OneScanner 600/27 Troubleshooting Guide

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Color OneScanner 600/27 with the cover raised; the carriage lock sits at the top of the glass (photo: Hellisp, CC BY-SA 3.0)

The Apple Color OneScanner 600/27 and the Apple Color OneScanner 1200/30 share one service procedure. Apple's Service Source chapters for the two scanners give the same start-up sequence, the same power supply voltages at J101 and the same symptom charts, and the 1200/30 chapter adds charts for its document feeder and Transparent Media Adapter.[1][2] The chapters give DC voltages, a drive motor resistance and an order for unplugging loads to find a fault; below that level the cures are module swaps.

Warning: several of these checks are made with the covers, glass and optical assembly removed and the scanner switched on. The power supply board carries mains voltage at its AC input. Keep fingers away from it and make the connections with power off.

First checks

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  • Carriage locked: a scanner that chatters at power-on and will not scan, or whose carriage silently fails to move, is usually still locked for transport. Lift off the top cover and turn the lock at the top of the glass 90 degrees with a coin or flat-blade screwdriver. The small arrow on the lock's dial, not the slot, shows the position.[1][3]
  • "Unable to initialize the scanner driver": the commonest cause is switching the scanner on after the Macintosh. Switch the scanner on first, wait about 20 seconds, then start the computer. Watch for the scanner icon (a side view of a scanner) at startup. If it does not appear, reinstall the software. If it appears crossed out, check the SCSI ID and cables.[1][4][5]
  • SCSI ID wrong: the label round the SCSI selector may not line up with the switch. Turn it to 12 o'clock and count clicks clockwise to the ID you want.[6] The selector sits between the two SCSI ports. Each ID has two positions: black numbers with termination off, for use with an external terminator, and red numbers with termination on. The factory setting is ID 2 with termination on. Do not use 0 or 7.[7][5]
  • With an old Apple OneScanner still on the chain, give the new scanner a lower SCSI ID than the old one, or take the old one off the chain.[5]

Normal start-up sequence

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Disconnect the SCSI cable first: some computers stop the sequence from running even when switched off. A healthy scanner then does this:[1][2]

  1. Power on; the power LED lights.
  2. The logic board tests itself.
  3. The lamp turns on and the optical assembly moves to the home position sensor at the top of the glass.
  4. The lamp turns off and on again, and checks its intensity against the white strip on the back of the glass.
  5. The scan origin is found from the black strip on the back of the glass.
  6. The lamp moves about 3 mm down, returns to the home sensor and turns off. The scanner is ready.

Note where the sequence stops; the charts below start from there.

Power supply voltages

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Power supply board connector J101 (Service Source)
J101 pins Nominal DC voltage
GND-1 +5 V 4.75-5.25 V
GND-3 +12 V 11.4-12.6 V
GND-6 +24 V 21.6-26.4 V

Apple's wiring diagram shows +5 V, +12 V and +24 V supplies reaching the logic board at J307.[1] Apple's image-defect chart prints a wider range, 20.4-27.6 V, for GND-6.[1][2]

No LED (no power)

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Apple's procedure isolates a load that is pulling a rail down:[1][2]

  1. Check the power cord and the mains supply.
  2. Remove the covers, glass and optical assembly. Switch on and check for the rated AC voltage at the AC input pin (pin L) of the power supply board. If it is wrong, replace the power supply board.
  3. Switch off, reconnect the optical assembly at J301, switch on and check J101. If any voltage is wrong, replace the power supply board.
  4. Switch off, unplug J301 (optical assembly) from the logic board, switch on and recheck J101. If it is now correct, the CCD driver in the optical assembly is faulty: replace the optical assembly. Reconnect J301.
  5. Repeat with J311 (drive motor), J306 (home position sensor) and J309 (LED cable) in turn, replacing whichever part brings J101 back into range when unplugged.
  6. If J101 stays wrong with all four unplugged, replace the logic board.

Lamp and motor

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Lamp and drive faults (Service Source)
Symptom Checks, in Apple's order
Lamp does not light Check the connection at J402 on the inverter board. Check J101 with the optical assembly connected; replace the power supply board if wrong. Ground J310 pin 2: if the lamp still does not light, replace the logic board. Ground J402 pin 2 on the inverter board: if the lamp does not light, replace the inverter board; if it does, replace the optical assembly.
Lamp lights but the drive motor does not work Check the carriage is unlocked. Check J307 and J311. Remove the optical assembly and switch on: if the motor runs, check the glass is the right way round. Check J101. With power off, measure the motor at J311: about 17.3 ohms between pins 1 and 2 and between pins 3 and 4. Wrong resistance means a new drive motor; right resistance and a good J311 connection mean a new logic board.
Lamp intensity or scan origin problem Check the glass is the right way round and nothing blocks the black strip or the top of the glass; replace the glass.
Home sensor not found; motor does not move the mirror even with the optical assembly removed Check the home position flag on the mirror assembly for damage (replace the optical assembly if needed); replace the home sensor (photo-interrupter); replace the logic board.

Source: Service Source general troubleshooting charts.[1][2] The lamp is a xenon lamp built into the optical assembly and is not sold separately; Apple rated it for 100,000 scans or five years.[8]

Image defects

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Image defects (Service Source)
Symptom Checks, in Apple's order
White only, black only or grey Check the SCSI cable; check the lamp lights; unplug J307 and check J101; replace the logic board; check J301, then replace the optical assembly
Blurred Clean the top of the glass with a soft dry cloth; check the mirror for dust or obstructions; replace the optical assembly
Uneven density or horizontal lines Clean the glass; check the white plate under the glass is intact; check J301 and J310 on the logic board; replace the logic board; replace the optical assembly
Uneven density or vertical lines Clean the glass; check the white plate; check the mirrors for dust; replace the logic board; replace the optical assembly
Misaligned vertically Check nothing obstructs the mirror; replace the optical assembly
Distorted Replace the optical assembly; replace the logic board

Source: Service Source image-defect charts.[1][2] Black arcs of different sizes on 600/27 scans come from dust on the two mirrors of the optical assembly, which Apple sent to a service provider for cleaning.[9] A thin white line about five pixels tall along the bottom of every Dispatcher scan is caused by the Dispatcher software, not the scanner.[10]

Document feeder

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  • Blank page or a strange vertical pattern: something has been left on the glass. Clear the flatbed before using the feeder.[11]
  • Paper not fed: check the feeder's connector cable, close the feeder cover fully, and keep to standard office paper no more than 2 mm or 20 sheets thick, without tears, punch holes, curls, carbon backing, labels, tape, glue, staples or clips. Then replace the logic board.[1][2]
  • Feeder option dimmed in the software: the feeder's small cable has come loose. Switch off, reconnect it, switch the scanner on, wait about 20 seconds, then start the Macintosh.[5]
  • Multiple pages cannot be faxed from the feeder: scan the pages and merge them before faxing.[1]

Transparent Media Adapter (1200/30)

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Transparent Media Adapter faults (1200/30 Service Source)
Symptom Cure
Lamp does not light or move Connect the adapter's cable; then follow "Lamp does not light" above
Chattering at power-on, no scan Tilt the adapter up and press the lock switch between the hinges to unlock its lamp
Overexposed image Load the film so there are no gaps round it and fill empty film-guide slots with shutter strips; close the cover securely
Image reversed left to right Place the original face down
Poor colour Align the "V" mark on the film guide with the "V" on the glass, or keep the original at least 15 mm from the top edge; do not cover the calibration strip
Mark or line in the same place Clean the diffuser with a soft dry cloth; clean or replace the film
Dark edge Move the film 7 mm from the edge of the glass; close the cover securely
Striped pattern Clean the diffuser, film or glass with a soft dry cloth

Source: 1200/30 Service Source.[2] A scratched diffuser cannot be cleaned out; Apple's answer was a replacement adapter.[5]

Software faults

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  • Photoshop plug-in stops working after being moved to the Acquire folder, and Dispatcher stops too: put the original back in its folder, unrenamed, and place a copy or alias in the Acquire folder.[1][12]
  • For Apple OneScanner Dispatcher problems (missing window, straightening, memory, display size), see that page.
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References

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  1. ↑ 1.00 1.01 1.02 1.03 1.04 1.05 1.06 1.07 1.08 1.09 1.10 1.11 Apple Computer, Service Source: Color OneScanner 600/27, PDF dated February 1996, from the Service Source 2.5 CD of 1997. Hosted as File:Apple Color OneScanner 600-27 Service Source (1996).pdf. Basics PDF pp. 3-9 (overview, features, optical assembly handling precautions); Specifications pp. 11-14; Troubleshooting pp. 16-27 (wiring diagram, normal start-up sequence, general troubleshooting with J101 voltages, image defects); Take Apart pp. 29-77; Additional Procedures pp. 79-86 (unlocking, SCSI ID, optical assembly to service position); Exploded View p. 88.
  2. ↑ 2.0 2.1 2.2 2.3 2.4 2.5 2.6 2.7 Apple Computer, Apple Color OneScanner 1200/30 (Service Source), 97 pages. Hosted as File:Color onescanner 1200 30.pdf and described on Apple Color OneScanner 1200/30 Service Source. Specifications PDF pp. 12-16; Troubleshooting pp. 18-31 (wiring diagram, normal start-up sequence, J101 voltages, symptom charts for the scanner, image defects, the document feeder and the Transparent Media Adapter); Take Apart pp. 33-86; Additional Procedures pp. 88-95; Exploded View p. 97.
  3. ↑ Apple Computer, Tech Info Library article 19448, "Color OneScanner 600/27: Chattering Sound due to Lock", created 5 March 1996, updated 29 April 1996. Copy at absurdengineering.org. The carriage is locked for shipping; a locked scanner may chatter or make no sound and will not scan; remove the top cover and turn the lock at the top of the glass 90 degrees; the arrow on the dial, not the slot, shows the position; relock before moving the scanner.
  4. ↑ Apple Computer, Tech Info Library article 19449, "Color OneScanner 600/27: Scanner Driver isn't Initalizing", created 5 March 1996, updated 13 March 1996. Copy at absurdengineering.org. "Unable to initialize the scanner driver": switch the scanner on before the Macintosh; the scanner extension icon at startup; reinstall the software if it is missing; a crossed-out icon means a SCSI problem.
  5. ↑ 5.0 5.1 5.2 5.3 5.4 Apple Computer, Apple Color OneScanner User's Manual for the Color OneScanner 600/27 and 1200/30, 1996. Hosted as File:Apple Color OneScanner 600-27 and 1200-30 User's Manual (1996).pdf. Chapter 1 system requirements p. 2; chapter 2 set-up, locking, SCSI ID and termination pp. 5-17; chapter 8 cleaning pp. 111-112; chapter 9 document feeder maintenance pp. 129-136; chapter 10 Transparent Media Adapter (1200/30 only) from p. 137; Appendix B troubleshooting pp. 155-158; Appendix C SCSI chains pp. 159-164.
  6. ↑ Apple Computer, Tech Info Library article 19455, "Color OneScanner 600/27: SCSI Selector Has Wrong SCSI ID", created 6 March 1996, updated 12 March 1996. Copy at absurdengineering.org. The label around the 600/27's SCSI selector may be misaligned; set the switch to 12 o'clock and count the clicks clockwise.
  7. ↑ Apple Computer, Tech Info Library article 19550, "Apple Color OneScanner 600/27: Terminator isn't required", created 1 April 1996, updated 17 April 1996. Copy at absurdengineering.org. Built-in termination; the selector between the SCSI ports has black (termination off) and red (termination on) numbers; default ID 2 with termination on.
  8. ↑ Apple Computer, Tech Info Library article 20065, "Color OneScanner 600/27: Expected Lamp Life", created 20 June 1996. Copy at absurdengineering.org. The 600/27 xenon lamp is designed for 100,000 scans or five years and is supplied only as part of the optical assembly (661-1084).
  9. ↑ Apple Computer, Tech Info Library article 19451, "Color OneScanner 600/27: Cause of Black Arcs on Pages", created 6 March 1996, updated 12 March 1996. Copy at absurdengineering.org. Black arcs on scans come from dust on the mirrors of the 600/27's two-mirror design.
  10. ↑ Apple Computer, Tech Info Library article 19784, "Color One Scanner 600/27: White Border Using Dispatcher", created 14 May 1996. Copy at absurdengineering.org. A white line about five pixels tall at the bottom of scans is caused by the Dispatcher software and can be removed in any image editor.
  11. ↑ Apple Computer, Tech Info Library article 19452, "Color OneScanner 600/27: Blank Scans With Document Feeder", created 6 March 1996, updated 12 March 1996. Copy at absurdengineering.org. Blank pages or vertical patterns with the document feeder usually mean paper left on the scanner glass.
  12. ↑ Apple Computer, Tech Info Library article 19450, "Color OneScanner 600/27: PhotoShop Plug-in Doesn't Work", created 5 March 1996, updated 12 March 1996. Copy at absurdengineering.org. The Apple Color OneScanner plug-in must stay in its original folder under its original name; put a copy or alias in Photoshop's Acquire folder.


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