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TS-440
S
CIRCUIT DESCRIPTIO
N
t
16
. Semi-self test functio
n
Semi-self test is started by turning the POWER switch o
n
with the 4 (AM) and T-F SET switches pressed
.
This test provides a method of testing the TS-440 digita
l
system in a shorter time during production or servicing
. Th
e
test enables the following
:
1.
Circuits which are difficult to test during program execu-
tion to be tested easily
. For example, dynamic data ca
n
be ouput as static data
.
2.
Items on which information is held only by the CPU an
d
is not available to the user to be tested
.
a.
Approximately threshold level inpu
t
b.
Incorrect input due to input pin faul
t
Operation procedur
e
1
.
POWER SW OF
F
2
. The power switch on while pushing switch 4 (AM) an
d
switch T-F SE
T
3.
The test number has starts from
"0"
to
"56"
and EN
D
when turn the VFO knob clockwise
.
Operation chart shows as follow
.
4.
To reset SEMI-SELF TEST function, Power switch OFF
.
TEST NO
. LIST
TES
T
NO
Condition
TES
T
NO
Conditio
n
0
Start All Fip's light's
31
RES = "H
"
All Fip's light's (Segment)
32
2
All Fip's light's
33
CO = "H" (AID
)
3
All Fip's OFF (digit)
34
„
=
"L"
I "'
)
q
Each digit lights G1
35
AX = "H" ( "
1
5
G2
36
="'L"
( )
6
"
G3
37
8255 Port A all = "H" (IC2
)
7
G4
38
"
"
all = "L"
(–
1
8
G5
39
8255 Port B all = "H"
(•
,
1
9
G6
40
„
"'
all
="L"
(„
)
10
„
G7
41
8255 Port C
CO-C3="H”
1,,
)
11
C4–C7
="L
”
"
"
G8
42
CO–C3="L”
(••
1
2
G9
43
C4–C7="H
"
8255 Port C all=
"H"
(IC53
)
13
G10
44
all=
"L"
(••
)
14
G11
45
LOCK,PTT,MIC,U/D,AT,VS-1(BUSY)chec
k
15
G12
46
[SIMPLEX] VS-1(BUSY)chec
k
16
"
G13
47
Key scan inport chec
k
17
BZ
ON
48
1
(LSB), [6
,V/M,VOICE (check
)
8
BZ
OFF
49
2
(USB),
,M/V,RIT,A/B (check
)
19
Mode LED all ON
50
3
(CWI, ] ,SCAN,XIT,SPRIT (check
)
20
all OFF
51
] (AM),
9 ,MIN,T-FSET,A=B,100L 200L 400L (••
)
21
RL
="H"
52
I5
(FM),
0 ,(FSK),CLEAR,IMHz,25L 50L 25U 50
U
22
53
ENT,DOWN,UP, 100U 200U 400
U
23
BAND all = "H"
54
–
24
all =
"
L
"
55
—
25
PD
="H'•
56
EN
D
2
6
27
ENF
= •'H
"
28
= "L" (immediatly
)
29
EN
P
30
2
5