4220 Flow Meter
Section 6 Maintenance and Service
6.4.3Do Not Disassemble or Lubricate the Printer
6.5Servicing And Troubleshooting
6.5.1Disassembling the Flow Meter
7.Locate the three small pins on each spool of the ink ribbon and turn the spools so the pins face the gears on the two ribbon shafts.
8.Replace the two spools on their respective shafts, pushing the detector levers out of the way so the spools will easily
9.Gently rotate each spool to tighten the ink ribbon. Rein- stall the paper
You do not need to oil the printer mechanism. As long as you keep the lid closed, keep the inside of the cabinet clean, and do not abuse the printer in any way, it should function normally. Teledyne Isco recommends you make no attempt to oil or disas- semble the mechanism if it malfunctions.
Oil attracts dirt; some oils can become gummy over time and may cause parts to bind or stick. Do not attempt to disassemble the printer mechanism, as you may bend or distort the frame or com- ponent parts. This will certainly cause malfunction.
Do not force any part of the mechanism with tools or probes. If you disassemble the flow meter, do not lift the chassis from the case by holding on to any part of the printer. The internal printer contains no
The remainder of this section provides servicing information and a general troubleshooting guide. This information will help you decide whether to attempt to repair the flow meter yourself or return it to the factory.
Included are sections on removing the flow meter chassis and fuse replacement. There are also general comments on servicing electronic equipment with special consideration of CMOS cir- cuitry.
You can remove the flow meter chassis from the cabinet for inspection and servicing. Unscrew the four screws, two at the top, and two at the bottom, that hold the flow meter chassis in the cabinet. You can then lift the chassis out by inserting the thumb or index finger from each hand into the upper right and lower left corners of the opening for the internal printer.
Do not try to lift the flow meter out of its case by holding on to any part of the printer mechanism. This could bend or distort part of the printer, possibly damaging it. Once the chassis has cleared the case, you can hold onto the edges with both hands and lift it free of the case.
