Heathkit GR-78 - Page 4

INITIAL TESTS
NOTE: A VTVM or a VOM wil be necasary to perform the
resistance and voltage tests in this section of the Manual. A
VOM having an impedance lower than 20 Kole should
not be se forthe tests,
RESISTANCE TEST
(09)
Position
alt
front
panel
switches
and
controls
in
the
{following
positions:
BANDSPREAD-ully counterclockwise
[AF GAIN-OFF (black knob),
RF GAIN-llyclockwive (silver knob).
ROV.STBY-=-ACV position.
CAL10 position opposite CAL.
AN.CW/SS8-CW/SSB postion,
AVCMVC-MVC postion.
ANLOFF-OFFpottion.
BAND-band A postion.
MAIN TUNINGfully counterclockwise,
aemarseere®
() Position the METER ADJUST control on recsiver
tlrcult boardotate contro! fully clockwise and then
‘V/4 turn counterclockwise when view from the reer
‘of the Recaiver. See Figure 4 (fold-out frm Page 73).
Refer to Figure 1 (fold-out from Page 69) forthe following
sup,
NOTE: The following tests ae partormed tobe sure thatthe
Kit has boon wired properly and that no short circuits exis
in the supply circuits, Ifthe proper ruts are not obtained,
‘efor to the "in Casa of Dificuty" scton of the Manual.
(2 Connact the meter common ead to the chasis and toch
the ohms lead wo the 5-1/4" white hookup wire
‘extending trom hole 12 In the receiver cirult board as
shown.
(H)Themeter should inca approximataly 120.2.
({) Turon the Receiver, There should be no change inthe
‘meter indication, Thon turn OFF the Receiver,
(4) isconnoet ha ohms la trom the white wire