HP (Hewlett-Packard) 5345AOPT12 Fish Finder User Manual


 
TB 9-6625-1996-35
10
a. Performance Check
(1) Mount circuit board A6 (fig. 1) on extender boards.
(2) Connect multimeter between A6TP6 and + 5 V RET (fig. 4). If multimeter
does not indicate between 4.98 and 5.02 V dc, perform b(1) below.
(3) Connect multimeter between A6TP3 and - 5.2 V RET (fig. 4). If multimeter
does not indicate between -5.18 and -5.22 V, perform b(2) below.
(4) Replace circuit board A6 in TI and mount circuit board A7 (fig. 1) on extender
boards.
(5) Connect multimeter between A7TP1 (A7TP2; serial prefix 1428A and prior)
and + 15 RET (fig. 4). If multimeter does not indicate between 14.98 and 15.02
V, perform b(3) below.
(6) Connect multimeter between A7TP3 (A7TP7; serial prefix 1428A and prior)
and -15 V RET (fig. 4). If multimeter does not indicate between -14.98 and -
15.02 V, perform b(4) below.
b. Adjustments
(1) Adjust R19 (fig. 4) for 5.00 V indication on multimeter (R).
(2) Adjust R29 (fig. 4) for 5.20 V indication on multimeter (R).
(3) Adjust R16 (fig. 4) (R18 (fig. 4); serial prefix 1428A and prior) for +15.00 V
indication on multimeter (R).
(4) Adjust R17 (fig. 4) (R24 (fig. 4); serial prefix 1428A and prior) for -15.00 V
indication on multimeter (R).