Table of Contents
Advertisement
1-3.
SERVICE MODE TO CHECK FL TUBE AND KEY
INPUT
It is possible to check FL tube all ON grid, segment and key
input.
(1) Connect
the equipment
to the amplifier DXA-H2750/
H3750 and remove the AC cord of the amplifier out of the
AC receptacle.
(2) While pressing 3 switches "BAND",
"—"
and "MEM-
ORY/NEXT" at the same time, insert the AC cord of the
amplifier into the receptacle.
(3) Thus, all FL display tubes light up. By pressing "+" or
"TIMER
CONTROL"
in this state, partial lighting or
key input checking, respectively, is effected.
Partial lighting: Indicates the mode to check complete con-
nection between the grid and segment of
the FL tube. The condition is normal when
the
following
indication
is effected.
By
pressing "+" or "—" in the partial lighting
mode, the status returns to key input check-
ing or all ON in (8), respectively.
7G 66 5G
3G 4G
26
;
P3 P4 P5
P7 P6
PB
G: Grid
P: Segment
Key input checking:
Shows
the mode
to check
key input
into 9 keys on the front panel. "0" is
indicated
at first,
and
every
time
a
different key is pressed, indicated num-
ber is increased. After completion
of
pressing all 9 keys, "PASS" is indicat-
ed.
(Once
a key
is pressed,
pressing
it
again is rejected.)
(4) After the completion
of the checking,
the equipment
recovers normal operation by once removing the AC cord
and inserting it again into the AC receptacle.
| ST-H2750/H3750
1-4.
HOW TO FORCEFULLY TURN POWER ON
The
equipment
is not provided
with
any
power
switch.
Therefore, power ON/OFF is controlled in the amplifier side.
However, even without an amplifier, power is supplyable to
the equipment according to the following methods provided
any type of power is available, e.g. using a special jig or
supplying the 4 types of voltages individually.
(When power is supplied from the amplifier, power is turned
ON only for the tuner.)
(1) Supply power.
(2) Press 3 switches "STEREO/MONO",
"—"
and "MEM-
ORY/NEXT" at the same time.
(Press
"STEREO/MONO"
and
"—"
beforehand,
and
finally press "MEMORY/NEXT",)
However, when the equipment is started up by the methods
above, service modes TIMER ON/OFF and FL tube and key
input checking are not operable.
Advertisement
Table of Contents
