Reassembly Of Balancer/Analyzer Assembly (Figure 5-17) - Honeywell Chadwick-Helmuth 8500C Maintenance Manual

Balancer/analyzer system
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Chapter 5 - Maintenance And Repair
f.
Feed paper into printer paper path by turning paper advance gear. If paper is not feeding in
straight, hold your finger against an edge to guide it into place as it feeds, or wait until
paper is coming out of unit and then pull it into position.
5.9.2.1.2 Disk Drive Assembly
a.
Install disk drive assembly (10) in disk drive bracket (9) and secure with four 1/4" pan
php. cad. screws (43) and four #4 standard split ring lock washers (46).
b.
Connect harness assembly four-pin power connector to disk drive (10).
c.
Connect A5 ribbon cable to disk drive (10).
d.
Connect ribbon cable to A5J2.
5.9.2.1.3 Distribution Board A5
a.
Attach distribution board A5 to disk drive bracket (9) and secure with two 4-40 nylon lock
thin nuts (47).
b.
Connect connectors to distribution board A5 as follows:
(1) Harness assembly connector R1P5 to A5J5.
(2) Harness assembly connector R2P6 to A5J6.
(3) Harness assembly connector A3P2 to A5J4.
(4) Ribbon connector to A5J2.
(5) Printer board connector 13(A1P3) to A5J3.
NOTE: Connector A5J7 is unused.
c.
Connect A5 ribbon cable to disk drive (10) (if not already connected).
5.9.2.1.4 Power Supply Board A3
a.
Install power supply board A3 on chassis (2) and secure with two #4 std. flt. .315" washers
(42) and four 4-40 nylon lock thin nuts (47).
b.
Connect harness assembly connector (Figure 5-19, A3P2) and LED connector
(Figure 5-19, A3P3) to power supply board A3.
c.
Replace bottom cover (3) on unit and secure with eight 3/16" pan php. blk. screws (32)
and two 1/4" pan php. blk. screws (33).
5.9.2.2

Reassembly of Balancer/Analyzer Assembly (Figure 5-17)

5.9.2.2.1 Heater/EL Control Board A4
a.
Install three #4 clear rnd. 1/4 o.d. standoffs (28).
b.
Install heater/EL control board A4 on keypad panel (1) and secure with one std. flt. .315"
washer (42) and four 4-40 nylon lock standard nuts (49).
NOTE: Be sure to reapply thermal grease between diode bridge, heatsink, and chassis.
c.
Connect the following to heater/EL control board A4: two harness assembly connectors
(Figure 5-19, A4P1-A4P2), keyboard backlight connector A4P5, and graphics module
(24) connectors A4P3 and A4P4.
5-70 Chadwick-Helmuth A Business Unit of Honeywell International, Inc.

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