
6–20
ARRANGEMENT AND FUNCTIONS OF ELECTRICAL PARTS
4. FAX Board/NCU
Figure 6-611
RAM-A: Used as page memory. When installed, it enables the use of Ultra Fine mode. (You must
install RAM-B if you have installed RAM-A; 3 MB.)
RAM-B: Used as image memory. When installed, it increases the size of memory for
transmission/reception images. (3 MB or 9 MB)
• NCU Board
Figure 6-612
SW1:
Must be used with all bits OFF.
SW2:
Must be turned OFF first when installing expansion memory; then, must be turned ON after
the work.
LED1:
Turns ON when 5V is supplied normally.
J3
J2
J1
J100
J3
VR1
VR2
J2
SW1
LED1
J5
J4
(RAM-A)
J6
(RAM-B)
SW2
Summary of Contents for GP215
Page 4: ......
Page 36: ......
Page 38: ...3 2 TROUBLESHOOTING IMAGE PROBLEMS ...
Page 39: ...3 3 TROUBLESHOOTING IMAGE PROBLEMS ...
Page 40: ...3 4 B Image Fault Samples ...
Page 80: ......
Page 92: ...6 6 ARRANGEMENT AND FUNCTIONS OF ELECTRICAL PARTS C Fans Figure 6 603 FM6 FM5 FM2 FM3 FM1 FM4 ...
Page 105: ...6 19 ARRANGEMENT AND FUNCTIONS OF ELECTRICAL PARTS 3 Composite Power Supply PCB Figure 6 610 ...
Page 204: ...C GENERAL CIRCUIT DIAGRAM General Circuit Diagram 1 4 A 3 ...
Page 205: ...General Circuit Diagram 2 4 A 4 ...
Page 206: ...General Circuit Diagram 3 4 A 5 ...
Page 207: ...General Circuit Diagram 4 4 A 6 ...