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Series 90 Setup Manual
SERIES 90L4/H8 FUSE REPLACEMENT
There are two fuses in the Series 90L4/90H8. One fuse is internal and is mounted on the power
supply board. The second fuse is on the rear panel and is marked Lamp Fuse.
1. Be sure power is totally disconnected.
2. To gain access to the power supply remove the six screws on the rear panel.
3. Remove the panel and set it down with the power supply board facing up.
When removing the rear panel, be careful not to over-extend the internal cabling.
3. Locate the fuse on the power supply board as shown in Figure 21, below. Use
replacement fuse with the same rating as the one installed. (Replacing the fuse with a
higher rated fuse can cause permanent damage to the power supply, scanner control
board, and scanner boards.)
4. Reinstall rear panel.
Rear Panel
SERIES 90L4
PIN LAYOUT
1
2 129
257
63
64
192
J1
J3
J5
J2
J4
J6
65
193
321
128
256
.100 PIN SPACING
Lamp Fuse
SERIES 90H4
PIN LAYOUT
384
1
2
65
129
193
320
448
31
32
96
160
224
J7
J1
J3
J5
J7
J8
J2
J4
J6
J8
449
33
97
161
225
128
64
192
256
384
512
.200 PIN SPACING - CTR. ROW
& EVERY OTHER PIN BLANK
LAMP
POWER
PROBE
LAMP
SERIAL
FUSE
PORT
Figure 21. Series 90L4/90H8 Fuse Locations
NOTE
Inside View of Rear Panel
Fuse
Power Supply Board
Page 39
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