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Figure 4: Alternative wiring on the A6 I/O MB for the 1-Hz option in a WJ-8718A and in a
WJ-8718A/MFP. Some strip-line female connectors and stranded wires are used.
8. Final steps:
For receivers with Manual Tuning Module only (WJ-8718A etc.):
a.
Locate the A6A1 Manual Tuning Up-Down Counter card (791575-X) on
the A6 I/O mainboard, sockets XA1 (X7 and X8); unplug and remove it,
replacing with the 796014 type (see Figures 4a-4b).
b. Place the new manual front panel (with an 8-digit frequency display and also
with a 4-section BFO thumbwheel switch eventually) in the front of the
receiver, taking care not to break the power switch shaft.
c. Reconnect to the proper front panel sockets all the plugs that had been
disconnected: the ones coming from J4 (A7P1 to manual tuning board), J2
(A8P1 to display), and J3 (A9P1 to BFO thumbwheel switch) on the new
A6A1 board (796014).
Reconnect also the A10P1 plug to J1 (on the A6A2 Front Panel
Interconnect 791828-X card).
7
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