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Fuse replacement
Three types of fuse are used in the 9814
1) 2 AMP 20mm quick blow - 5V supply
2) 2 AMP 20mm anti surge - Mains input
3) 2.5 AMP 20mm anti surge - 18V supply
Replacement fuses are available from Time Electronics and R.S. Components. See
SECTION 9 (Spare Parts) for order details.
Fuse location and replacement procedure
1) The mains fuse:- This fuse is located in the mains inlet filter. To replace, discon-
nect equipment from mains and lever down hinged cover to reveal fuse holders.
2) 5V supply:- The 5V supply fuse is mounted on the left hand printed circuit board
of the power unit.
3) +/- 18V fuses:- These fuses are mounted on the right hand printed circuit board
of the power unit.
Main Frame
The 9814 is constructed on a 19 inch Euro-card frame. Cards and modules plug into
the frame from the rear of the unit.
All modules and printed circuit boards connect to the 64-way data bus via a DIN
41612 type connector.
The front panel is removed by unscrewing the four captive screws at each corner.
Then lift away from the frame.
Power Module Replacement
To remove the power unit module which is located on the right hand side of the
frame viewed from the rear, first unscrew the four captive screws in the corners of
the power unit rear panel. The power unit can then be pushed out of the rear of the
frame. DO NOT PULL ON THE MAINS LEAD.
Replacement is in the reverse order.
Replacement of IEEE and Processor Boards
The IEEE and processor boards are located behind the IEEE rear panel. Remove
the panel by unscrewing the four captive screws at each of its corners.
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