Monarch 9835TM, 9830TM, 9820TM manual Tests and Adjustments, Service Tests, Continuity Tests

CHAPTER 5 TESTS AND ADJUSTMENTS

SERVICE TESTS

The following tests are described in this section:

∙Voltage Tests

∙Continuity Tests

∙Supply Quality

NOTE: Sensor tests are described in Chapter 8, “Supply Sensing Systems.”

CN6 Power Supply

Pin numbers are read from left to right including empty positions.

∙Transformer secondary non-rect AC output

Pin 1 & 3 = 15VAC Pin 3& 4 = 15VAC

∙Transformer secondary rect DC output Pin 5(+) & Pin 6 (Grnd) = 40VDC

Continuity Tests

WARNING

Failure to turn off and unplug printer for these test

could result in electrical shock.

Transformer - Primary Side

Should be tested at AC Inlet under the boot.

∙Black & Brown = 0-2 ohms

∙Black-White & Brown-White = 0-2 ohms

∙Orange & Orange-White = 0-2 ohms

∙All other combinations must read infinite (open) resistance.

Transformer - Secondary Side

Ohm reading must be taken with power off.

∙At CN6, all combinations of Pins 1, 3, & 4 = 0-1 ohms

∙At bridge rectifier, reading across both Yellow wires = 0-1 ohms

∙All other combinations must read infinite (open) resistance

Bridge Rectifier

1.Set Ohm meter to 2000K scale.

2.Remove wires from device.

3.Black lead on Red wire terminal (labeled + on device, at the notched corner) and leave attached while moving red lead to other terminals of the device should yield:

∙Red lead on either yellow wire 90° from that corner should read approx. 500 ohms.

∙Red lead on black wire (diagonal from red wire terminal) should read approx. 1000 ohms.

Switch Red lead to red wire terminal and move Black lead to all other positions. The result should be infinite ohms.

Head Open Sensor

Hall Effect Sensor (HALL1) is located at the top of the board and must be within 6 mm of the magnet.

Top leg of chip (closest to the top edge of the board) changes between +5VDC and ground in response to the magnet in the Print Module. It should be at 0VDC (with respect to frame ground) when head is closed. If magnet is bent, operation may be affected.

Displaying Machine/Service Totals

This test is performed online using SENDFILE. Only the Service Totals test sequence requires an intermediate step to access. It requires the operator to run Diagnostics (D) from the SENDFILE Format Page screen, resulting in the Sensor Display format, and then run Service Totals (S) from the Sensor Display screen.

1.Press M for Modify Service Totals.

2.The initial Service Totals format has a temporary prompt box in the center of the screen that requests a password.

NOTE: If a password is not given, totals are displayed but can not be changed.

3.To modify totals, enter the applicable number (1,2,3,4 ).

4.Before clearing a totals number, the routine prompts another response. Pressing Y causes a reset to 0. Any other entry results in an abort.

July 1998 TC9830SM Rev. B 7/98 Confidential 23