In Case Of Trouble - Yaesu FT-847 Operating Manual

In Case of Trouble . . .

The suggestions below may help you recover from commonly-encountered operational difficulties.
T W
RANSCEIVER
¦ Be sure your power supply is turned on.
¦ If power supply does not turn on, check power sup-
ply fuse(s).
¦ Check connections from DC power supply to en-
sure both ends of cable are securely connected.
¦ Check condition of fuses in DC cable.
¦ Check for poor mechanical connection at fuse hold-
ers in DC cable.
N A O
O UDIO UTPUT
¦ Check position of AF (G
not fully counter-clockwise.
¦ Rotate SQL (S
QUELCH
wise to ensure that audio is not being muted by
normal S
QUELCH
¦ If on FM mode, check to see if the "DEC" or "DCS"
icons are visible on the LCD, indicating that the
CTCSS Decoder or DCS are On (thus muting au-
dio). Press [3 (TONE)] repeatedly until these icons
disappear.
¦ Check to see if an improper cable is connected to
the PHONE or EXT SP jack.
¦ Check to see if the [MOX], microphone [PTT], or
desk microphone [TX/STBY] switch is closed (the
"TX" icon will be visible on the LCD if this is the
case).
S A
IGNALS PPEAR
B P /L
UT OOR OW
¦ Check to see if the DSP LOW CUT or HIGH CUT
controls are improperly positioned. Switch DSP Off
to confirm.
¦ Check IF Shift control to be sure it is not fully clock-
wise or counter-clockwise.
¦ Check operating mode, especially during Satellite
operation. SSB, CW, and/or FM modes can easily
become reversed.
¦ IF FM signals sound distorted, be certain you are
not accidentally receiving in the AM mode.
¦ If YF-115C CW filter is installed, but bandwidth
is too wide, check Menu #33 to ensure that the CW
filter's Menu setting is "On."
¦ If operating on CW, be certain that the DSP's Notch
filter is Off ([D. NOTCH] key).
[ N ] K
D
AR EY OES
( CW M ) :
ODE
¦ Set Menu #33 to the "On" position.
98
N T O :
ILL OT URN N
I B H
S EING EARD
) control to be sure it is
AIN
) control fully counter-clock-
operation.
O S- ,
N METER
A :
UDIO
N R
OT ESPOND
C
ANNOT
¦ Check to ensure that coaxial cable is connected to
correct ANTENNA jack.
¦ On 50 MHz, ensure that coaxial cable is connected
to the same jack as set by Menu #28 ("SEP" = "50
MHz A
¦ Check operating mode, especially during "Split"
or Satellite operation. Be sure that the "TX" VFO's
operating mode is properly set.
¦ Check to ensure that the operating frequency is
:
within an amateur band (if you see an "E
message).
¦ Check to ensure that any FM repeater shift is not
causing transceiver to attempt to transmit outside
an amateur band (if you see an "E
G
ENERAL
SSB/AM Modes
¦ Check setting of MIC (G
is not fully counter-clockwise.
¦ Check position of RF PWR control, to be sure it is
not fully counter-clockwise.
¦ Check operation of MOX or PTT switch to ensure
that the "TX" icon is appearing. See previous sug-
gestions, if not.
¦ Check settings of Menu #92 (USB) and/or Menu
#93 (LSB) if you receive reports of excessively high
or low tonal pitch on your voice. Reset to "0" to
test.
¦ If using an external computer-generated "Voice
Keyer" device, ensure that both "TX Audio" and
"PTT" cables are connected (because the FT-847
does not have "VOX" circuitry).
¦ If using MD-100
ensure that the coiled cord is connected to the
transceiver's front panel MIC jack, and that the
(short) straight cable is connected to the micro-
phone tube.
CW Mode
¦ Check setting of RF PWR control, to ensure that
it is not fully counter-clockwise.
¦ If using external electronic keyer, ensure that key-
ing cable is connected to "Positive" ("+") jack on
external device (not "Negative" or "Grid Block").
¦ If continuous "Key-down" tone is present, check
to ensure that K
reo") type, not 2-conductor.
¦ If using computer-driven keying interface, ensure
that proper computer port (COM or LPT) and any
required "TSR" programs are enabled.
¦ If using a computer-driven keying interface, ensure
that keying cable is connected to correct port (COM
or LPT).
T :
RANSMIT
" jack; "HF" = "HF A
NT
T D
RANSMITTER IFFICULTIES
) control, to be sure it
AIN
or MD-1
Desk Microphone,
A8X C8
plug in use is 3-conductor ("Ste-
EY
FT-847 O
PERATING
" jack).
NT
"
RROR
" message).
RROR
:
M
ANUAL