Heathkit GR-78 - Page 30

IN CASE OF DIFFICULTY
“Thin sation of the Manual is divided Into two pars, The
fist
art,
titled
General
Troubleshooting
Information,
scribes what to do about any dificult that may oscur
rit aftr the Recover it asembled, The second part, ©
Troubleshooting Chart, lstea numberof posible faites
‘that ould arise, nd sts several pombe cua,
Before strting any troubleshooting. procedure, try 10
rarrow the problem down to «specific area by tryg the
varius unetions of the ecole
GENERAL
TROUBLESHOOTING
INFORMATION
‘Te following paragraphs dal withthe types of difculties
that may show up ight oft a kit ie aiembled, These
ifeutos are most ikely to be caused by assy rors
‘oF
faulty
soldering,
These
checks
wll
help
you
loate
any
‘ror ofthis type that might have baen made,
NOTE: In an xtreme ese where you are unable 0 resolve 8
Aitficlty, rater to the “Customer Service” information
Inside the rear cover of the Manvsl, Your Warranty ie
locate ire the 008 cover
1, Reshock the wirog, 1 is foquently helpful to have &
‘rind check your work, Someone wha i na familiar
with the unit may notice something consistantly
‘averlooked bythe bulkier,
‘About 0% of the kts that are returned for rape da
not function property due to poor connections. and
‘soldering, Therefore, many troubles can be eliminated
‘by reheating all connections to make sure that thay ar
‘odor ascarid in the soldering ction ot the Kit
Builders Guide
‘3. heck the yes ofthe parts. Be sre that the propee
rs hve boen wired into each eeu, a show inthe
Detail dagrams and ot alld out in the wiring
Instructions.
4. Chak for bits of solder, wire ends, cr other foreign
rater which may belo in the wiring,
5, Chock flor solder bridges btwoun clout boar fl
6. Wi, after careful chock, tho rouble is tl not located
ana voltmete cavalabe, check the voltage in the
circuits of your General Coverage Receiver apna
‘those
shown
on
the
Voltage
Charts
(Pages
103,
104,
sand 106) and Schematie (oldout from Page 117),
NOTE: All vottgo readings were taken with on 11
Imegohm input voltmeter, Voltages may vary as much
26 120%,
7.
review
ofthe
Circuit
Deseription
an
a
study
ofthe
Schomatie
Diagam
may
alo
help
you
locate
a
ditietty
in
ve
Racivr,
Rater
to
the
X-Ray
Views
‘of
the
circuit
boards
on
Pape
101
to
help
fate
pats