Sharp CX34L3, Service Manual

Page: 2 / 50

2-1
2-2
CX34L3/51L3/51L4
2
SPECIFICATIONS
Convergence
.................................................................................
Self Converging System
F
ocus
.........................................................................
Electrostatic Focus High Bi-Potential
Sweep Deflection
...................................................................................................
Magnetic
Intermediate Frequencies
Picture IF Carrier
...............................................................................................
38.9 MHz
Sound IF Carrier Frequency
5.5 MHz
..........................................................................................................
33.4 MHz
Colour Sub-Carrier Frequency
.......................................................................
34.47 MHz
Power Input
...................................................................................
A
C220 - 240V
, 50/60 Hz
Power Consumption
CX51L3
...................................................................................................................
74 W
CX51L4
...................................................................................................................
79 W
CX34L3
...................................................................................................................
58 W
Audio Power Output Rating
CX51L3, CX34L3
..................................................................................
3.0 W (at Max.)
CX51L4
..................................................................................................
5.0 W (at Max.)
Speaker
Size
CX51L3
.............................................................................................
8
c
m
Round (1 pc)
CX51L4
.....................................................................................
5
×
9 cm Elliptic (2 pcs)
V
oice Coil Impedance
.........................................................................
1
6
ohms at 400 Hz
CX34L3
.....................................................................................
5
×
9 cm Elliptic (1 pcs)
Aerial Input Impedance
VHF/UHF
.......................................................................................
7
5
ohm Unbalanced
Receiving Channels (P
AL-B/G)
»
V
H
F
..........................................................................................
A
U
0
thru
AU12 ch
»
U
H
F
........................................................................................
AU28
thru
AU69 ch
Receiving Frequency
»
VHF-Channels
....................................................................
44.25
thru
463.25 MHz
»
UHF-Channels
.................................................................
471.25
thru
863.25 MHz
Dimensions
CX51L3
..............................................................................................
Width:
499.0 mm
Height:
474.0 mm
Depth:
486.0 mm
W
eight (Appro
x.):
20.0
kg
CX51L4
..............................................................................................
Width:
594.0 mm
Height:
465.0 mm
Depth:
484.0 mm
W
eight (Appro
x.):
20.5
kg
CX34L3
..............................................................................................
Width:
357.0 mm
Height:
361.0 mm
Depth:
368.7 mm
W
eight (Appro
x.):
9.2
kg
Cabinet Material
.................................................................................................
All Plastics
Specifications are subject to change without prior notice
.
IMPOR
T
ANT SER
VICE NO
TES
Maintenance and repair of this receiver should be done by
qualified ser
vice per
sonnel onl
y
.
SER
VICING OF HIGH
V
O
L
T
A
GE SYSTEM AND
PICTURE TUBE
When servicing the high voltage system, remove static charge from it by connecting a 10k ohm Resistor in series with an insulated wire (such as a test probe) between picture tube dag and 2nd anode lead. (AC line cord should be disconnected fr
om A
C
outlet.)
1.
Picture tube in this receiver employs integral implosion protection.
2.
Replace with tube of the same type n
umber f
or contin
ued saf
ety
.
3.
Do not lift picture tube by the neck.
4.
Handle the picture tube only when wearing shatterproof goggles and after discharging the high voltage completely
X-RA
Y
This receiver is designed so that any X-Ray radiation is kept to an absolute minimum. Since certain malfunctions or servicing may produce potentially hazardous radiation with prolonged exposure at close range, the following precautions should be observed:
1.
CX34L3
:When repairing the cir
cuit,
be sure not to increase the high
v
oltag
e
to more than 23.7 kV
±
1.5kV
(at beam 0
µ
A) f
or the
set.
CX51L3/CX51L4
:When repairing the cir
cuit,
be sure not to increase the high
voltage to more than 28.0
kV
±
1.5kV
(at beam 0
µ
A) for the
set.
2
.
CX34L3
:T
o keep the set in a normal operation,
be sure to make it
function on 22.5 kV
±
1.5 kV (at beam 800
µ
A) in the case of the
set.
The set has been factory – Adjusted to the abo
ve-men-
tioned high v
olta
g
e
.
CX51L3/CX51L4 :
T
o
keep the set in a normal operation,
be sure to make it func-
tion on 24.5 kV
±
1.5 kV (at beam 1,100
µ
A) in the case of the
set.
The set has been factory – Adjusted to the abo
ve-men-
tioned high voltage.
If there is a possibility that the high voltage fluctuates as a result of the repairs, never forget to check for such high voltage after the work.
3
.
Do not substitute a picture tube with unauthorized types and/or brands which may cause excess X-ray radiation.
BEFORE RETURNING THE RECEIVER
Bef
ore returning the receiver to the user
, perf
orm the f
ollo
wing saf
ety c
hec
ks.
1
.
Inspect all lead dress to make certain that leads are not pinched or that hardware is not lodged between the chassis and other metal parts in the receiver
.
2
.
Inspect all protective devices such as non-metallic control knobs, insulating fishpapers, cabinet backs, adjustment and compartment covers or shields, iso- lation resistor-capacity networks, mechanical insulators and etc.