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------~~~p~~~-----------------------------------------------------------------
I(~
Yi -
0.'
.
',,"\
o.?-'
6 .
.0
• "j '.
~"'Fig;~5~2 Re~harge
characteristic
i
.~!.
': -" t;:ibiEi'
5-5' Recharge circuit test point,
..
floin! , .
Voltage ,
R9ma~ks
ii'ON at low, c.ontrol with VR1.
B
7,5±0.21(
O:g~l.oN
Vo!t~ge/current ar~ ch~ged
arouhd
this
P9int.
',c'4r~ent reduces around this point.
D
6.5±0.2V
." _ yl,lrr.ent is constant though voltage is
varie~:L
1.i1119: require-d for; chargio!!J, . .th,EJ':ba.ttery;-ia _.ab?!-It 8,.h9Ufs; when the. set
is OFF (IPON is at low), and 20 to 30 hours ..
whe~tl)eset
is ON
(IPON is athigh)..
. ,
. '
,
l:i~g,Qesc:riptionorblacklwhitElllcjuid
·.crystaLbackHgfitinvei1er
(type:IV1
a106) .
, ; i
;
oj:
'
);',
~
!
5·4·1. General
(2)
Electrical characteristics
,
-,,'
This PWB unil is employed to
dri~e
the LCD baqklight (cold cathode
, ray-tube) which will-be directly installed to the plastic cabinet inside
the :dlsplay.
Three
connectors are usee for the'lIO and control.
sign~1
interfacing.
, Parameter
. SYmb.o1
Nominal
NOTES:
1.
,his Unit drives the entire packl,ight circun with
th~
-power supply only; :except, that- it is cOnJ)9cted with an
extern-ai
VA
and control lines.
'
'
. :
'"
,
'"
2. -
Since it is' an
assembly -unit, parts"
replacement
and
'-
r~pair~re
hot allowed. In
cas~
it
t"\as
to·pe,replaced'with
a
~ new onei
unfasten
-the
cormectcirs
'and remove
screws.
3.- Pay attention to a high tension voltage, of 1000V on the
secondary side: 'when_ Qperatiiig. For wires that are ex-
posed over and below the
transformer.
these must be
treated with cats as it may re!3ult in
wire.
breakage.
4 ..
Sh1ce
this: unit
is
,' c brnpElCf' "
~~d,
'jow,
Piofile, the board
heighf'iEf lOW,' width
narrow,
and
long
ill
the
longitudinal
dir~cti~n!_
iLwqulq ,1:I!3
IJabl~_
to,
~ama_ge
if
subjected to
twisting. -So; never ·drop--cr :
twist
it
to
avoid possible
damage;
,54-2.Electrical cl'!ari\cteristics
. (1)
Maximum allQwablE! ratings
' .
Parameter,'
Symbol
Rating
'.'
Inputvoitage
, _ Vin
16V
Input power
Pin
3,6W
Operating temperature
Ta ..
O-SO'C·
,
Stor'ilge
t~r:nper?lture
-.Is
-,20-75'(; .
--
,
',80% with iil'aximum wet
Operating humidity'
RH;·
". ' balihufTlidity at 3S'C
., ),.
TaoleS-6
-?6-
Input voltage
Yin
DC12V
inp-ut current
lin
0.24A
No~load
release voltag,e
Vs
AC100Vrms
.
'
Tube current
IL
S.OmA
Oscillation frequency
f
65kHz
Chipping frequency
fch
60kHz
Table 5-7
The following circuit is used fo'r intensity adjustment.
VR
G)
®
··cW
(3) Connector
pin
layout
ICWXDI
.1~ICN3
CN2
, Fig. 5-3
,
PWi3. top view
1
(a)
CN1 piilconliglliaiion
,.
.
PinNeo
Signal name
----
,
(j)
GND.
<21~
.
.
N.C
@
OUT'
"
'
,
Note
(9.0-16.0V)
Lamp load
Vin=12V •
VR=On
Symbol
GND.
OUT
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