M Ic R O P R O C Es S O R Ba C K -Up; M I C R O P R O C Ess O R R E S; O R D E R I N G S Pa R E Pa R - Kenwood TS-440S Instruction Manual

Symptom
The S -mete r d e f l ects and stays at a
c e rtain position even w it h n o sig nal.
S ig nal is receive d , but no so u nd i s
h e ard.
S S B received sig nal i s extreme l y h ig h
c u t o r l o w c u t .
F re q u e nc y is not c h ang e d b y pressing
t h e BA N D sw itc h o r t u rning t h e t u ning
contro l .
Program sc an fails.
M e m ory sc an fails.
D isp l ay goes out with V F O / M O N .
T RA N S M I S S I O N
S y m ptom
N o output i n SSB (RF and A L C meters
do not d e f l e ct . )
V O X d o e s not operate.
VOX trips by speaker outp ut.
N o output i n C W
Linear am p l ifier d o e s not key.
5-5. MICROPROC ESSOR BACK-U P LITHIUM
BATTERY
l i th i u m batte ry is conta i ned in the tra nsceive r to reta i n
A
m e m o ry . Turn i n g off a n d POW E R switc h , d i sconnec­
ting the powe r cable, or a powe r fa i l u re w i l l not erase
the m e m o ry . The batte ry should last for a p p roximately
five yea rs . When the batte ry d i sc h a rges , a n erroneous
d i splay may a p pear i n the d i splay. Lith i u m batte ry
replacement shou ld be performed by an a u thorized
K E N WOOD servic e fac i l i ty;
dea l e r , o r the fa ctory , since this unit conta i n s CMOS
type c i rc u i try .
Notes :
1 . W h e n t h e l i t h i u m
m i c roprocessor m u st b e reset, u s i n g t h e proce d u re
i n sect i o n 5 - 6 .
2 . W h e n the l ith i u m battery f a i l s , t h e rad i o ' s m ic rocod­
e d f u n c t i o n s are N OT affecte d . O n l y i n f o r m a t i o n
s t o r e d i n m e m o ry w i l l be c l e a red .
22
Probable cause
1 . L o w AC l ine vo ltage.
2. R F g ain c o ntro l c l osed.
M O D E key posit ion is i ncorrect .
I F S H I F T contro l i s w rong adj u sted.
F. L O C K sw i t c h is O N .
M e mory c h an n e l is 6 an d 7 or 8 and 9 are
e m pty.
M e mo ry is e mpty.
W h e n noth ing i s stored in the m e m o ry
c h anne l , a c h a n n e l
b l anked w it h o n l y t h e d e c i m al point d is-
p l ayed.
Probable cause
1 . O p e n m i c r o p h o n e
micro p h o ne.
2.
Low mi c ro p h o ne g ai n .
1 . V O X G A I N control too l o w .
v o x
2 . A N T I
j u stment.
A N T I VOX c o n t r o l req u i res adjust m e nt.
T h e key p l u g i s i n c o m p l e t e l y i n se rted o r
1
K EY c o ntact fai l u re.
1 . I nt e rnal c o n n e c t o r w as n o t moved .
2 . R E MOTE connector i s m i s w i r e d , o r has
a poor conta ct.
either you r K E N WOOD
b a t t e r y i s r e p l a c e d , t h e
1 .
2.
C h ang e t h e M O D E key
m o d e .
S et t h e contro l to t h e c e nter ( c l i c k p o -
sit ion).
S et F. L O C K sw itc h to O F F .
S t o r e t h e f re q u e n c y .
i s d i sp l ayed
and
c a b l e o r b a d 1.
2.
S e e se ct i o n 3- 1-2, V O X G A I N c o n t r o l .
c o ntro l r e q u i r e s ad -
S e e sect i o n 3- 1-2, A N T I VOX c o n t ro l .
1 .
2 .
1 .
2.
5-6. MICROPROC ESSOR RESET
W h e n the m i c roprocessor has f u n ct i o n e d e r r o n e o u s l y
o r w h e n sett i n g t h e t r a n s c e i v e r i n t h e i n it i a l state ,
s w itch on the pow e r w ith t h e A = B s w i t c h presse d .
N ote :
The m icroprocessor c a n be e a s i l y reset . H owever, o n l y
p e r f o r m t h i s o p e r a t i o n w h e n n e cessary s i n c e t h e c o n ­
t e n t s of m e m ory a r e c l e a red b y resett i n g .
5-7. ORDERIN G SPARE PARTS
W h e n o r d e r i n g re p l a c e m e n t o r s p a re parts for y o u r
e q u i pm e n t , be s u re t o s p e c i f y t h e f o l l o w i n g :
Model a n d serial n u m be r o f your transceiver . S chematic
n u m be r of t h e p a rt . P r i nted c i rc u it board n u m be r on
w h i c h t h e p a rt i s located , p a rt n u m be r a n d n a m e , i f
know n , a n d q u a ntity d e s i red . P a rt n u m bers f o r m o st
r e p l a c e m e n t p a rts is c o n t a i n e d i n t h e service m a n u a l
(a va i l a b l e a s a n option f r o m y o u r d e a l e r ) .
Co rrective action
U se a ste p - u p transformer to raise t h e
l ine vo ltage.
U se a 1 2 to 1 6V b attery.
T u rn t h e R F g a i n c o nt r o l
c l o c k w ise .
to t h e corre ct
Corrective action
C he c k the m i c r o p h o n e.
I n c rease t h e M IC gain control.
I n se rt t h e key p l u g f u l l y.
Turn t h e C A R c o n t r o l c l o c k w i s e .
Move t h e c o n n e c t o r a s desc r i bed i n
sect i o n 5-8-10 .
C orrect w i r i n g .
f u l l y