I get Locked scan head error When I try to scan.
I figured out that the scanner looks for black, then white on the underside of the flatbed at the beginning of scan cycle not seeing this it assumes the head did not move and it therefore locked.
Lamp works. Stepper motor drive system works. One touch software detects scanner as present.
I found 4 expled 100 ufd 15 V caps on logic board and replaced them.
No help. The circuit appears to be similar to a series 5 V regulator in my Radio Shack Power Supply Book. I think part marked TR3 is blown. TR3 screened onto logic board. Chip is 3 lead + heat sink tab transistor and has B A R U printed on it as part ID in 2 lines. I cannot figure out exactly which lead is which except that tab is collector. I tried replacing with both PNP and NPN transistors and neither help. Unit draws 470- 480 ma at 12 v from a lab quality DC supply.
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Sounds like the scan head is locked. This is usually done so you can transport the scanner without bouncing the scan head out of alignment. Look under the scanner and you will see it. Make sure it's in the UNLOCKED position. You may need to power the unit off/on to reset it or restart your computer to get a fresh attempt at the scanner.
This is a typical problem with this printer also followed with scanner error. Most likely cause is scanner optics dirty causing the scan head to be unable to find home position ( white strip on the underside of the glass). Note cleaning the scanner optics requires technical know how as its fairly difficult to remove the glass. Damage to optics may cause image defects on output.
Sounds like the scanning mirror might be locked - during shipping, the mirror is locked to prevent damage. Look around the back or the underside of the unit and look for a slider with a lock/unlock picture on it. Slide it to unlock and the mirror should be free to move.
L1-00 indicates feeding is not completed within the specified time after starting feeding. (The scan head locking switch is locked)
The white area and the black marking on the shading plate are used to obtain the difference in the CCD level values for judgment of lock. When the difference in the levels of which and black is small, it is judged that the black mark could not be scanned by lock and the trouble code “L1” is displayed.
If the lamp simply will not move then the green latch on the bottom of the scanner is locked and holding the scan head in the locked position.
If it is a scan to network issue or scan to E-mail you need to use a USB or parallell cable and you may have to change the USB port speed, But without knowing which problem you have I am not sure exactly where to head with this problem.
The scanner lock is located on the underside of the scanner. If you look in where you reach to remoce your copies, you will see on the bottom of the scanner a green latch, about 2 inches long and a half an inch wide. Push it in then pull it toward you until you feel it snap locked . Then power the machine off and back on.
If you get a "Scanner failure" message then the problem is the motor itself. Notice how the motor works fine when the scanner is moving slowly, like copies or faxing with the original laid on the glass. HOWEVER, the scanner failure comes up when you use the automatic document feeder on top. Why? Because the scanner assembly has to move to the other side of the printer at high speed to get into position, and it's the high speed movement that triggers the error on the printer. The motor is expensive, part number Q3450-60003. Many other models use the same motor, maybe you could find one cheap somewhere and swap the motor?