IBM 3900 Continuous‑Form Printers Set‑Up Guidelines

This document is a technical advisory on how to set up IBM continuous-form printers for use with Katun toner and developer.

Brand: IBM
Category: Printer
Document type: Service Manual
Language: English
Pages: 2
File format: PDF
File size: 2.9 MB
Published: 24 February, 2012
Updated: 30 September, 2023
MD5 checksum: 97CC0E8EE532ABB9EF51784EBD974CC9
PDF: IBM 3900 Continuous‑Form Printers Set‑Up Guidelines PDF

About this manual

This document provides step‑by‑step set‑up instructions for IBM 3900 continuous‑form printers when the Katun toner and Katun developer are used. It is intended for experienced service technicians and explains when and why the adjustments should be performed.

The procedure covers removing the OEM developer, setting the contrast switch, measuring voltages with a multimeter, and adjusting several potentiometers (VR1, S1, S2) to specified voltage readings. Adjustments must be made after new developer is installed and before any printing begins.

What's inside

Tools Needed
When to Use This Document
Adjustment Procedure
Voltage Measurements
Potentiometer Settings
Final Verification

Specifications

Contrast Switch setting	4 (middle)
S1 potentiometer voltage	≈2.4 ±0.1 Vdc

Frequently asked questions

When should the printer be adjusted?

Adjustments must be done immediately after new developer is installed and before printing begins, and only by an experienced technician.

Which toner and developer are required for these adjustments?

The adjustments are intended for use with Katun toner and Katun developer.

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