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2.2.2. Circuits
1. Video Data Processing
•
Smoothing is as described in section 3-5-1 of the Group 3 Facsimile
Manual
•
There is no reduction.
2. Thermal Head
Both machines use an A4-width [8.3"] thermal head. Refer to section 3-5-2 of
the Group 3 Facsimile Manual for a circuit diagram.
The operation of the thermal head is as explained in the Group 3 Facsimile
Manual, except that when printing a line, blocks 0 and 1 are printed together,
then blocks 2 and 3 are printed together.
The data are printed as explained in section 3-5-3 of the Group 3 Facsimile
Manual. In Fine mode, the pulse width is automatically increased by 50%.
The machine prevents overheat protection by adjusting the pulse width in ac-
cordance with the temperature measured by the thermistor on the thermal
head.
Reference: Group 3 Facsimile Manual, sections 3-5-1, 3-5-2, and 3-5-3.
November 30th, 1991
DETAILED SECTION DESCRIPTIONS
PRINTER
2-6
Summary of Contents for FAX500
Page 1: ...FAX550 SERVICE MANUAL...