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AV-28WX1EP
AV-32WX1EP
SPECIFICATIONS
Cotour System
Stereo System
Teletext system
Receiving Channels and Frequency
VHF
UHF
Intermediate Frequency
VIF Carrier
SIF Carrier
Colour Sub Carrier Frequency
PAL
SECAM
NTSC
Power Input
Power Consumption
Picture Tube
High Voltage
Speaker
Audio Output
PAL / SECAM / NTSC (only in EXT modes)
NICAM (L, B/G) / A2(B/G)
Content
item
@
28
a ee
Dimensions(W xH xD)
716mm x 489mm x 496mm
805mm
x 550mm x 550mm
Mass
37.5kg
48.4kg
TV RF System
CCIR
L, B/G,1
FASTEXT (United Kingdom system), TOP (Germany system)
WST (Standard system)
47MHz - 470MHz
E2~€12,
ITALY A~H+2,X~Z+2,
S1
[ NF-B~NF-6, B~Q,
F2~F10
470MHz - 862MHz
E21~E69, F21~F69
38.9MHz (L, B/G, I) / 34.25MH2 (L')
zal
32.4MHz (L: 6.5MHz), 33.4MHz (B/G: 5.5MHz)
32.9MHz (I: 6.OMHz) / 40.75MHz (L': 6.5MHz)
4.43MHz
4,40625MHz / 4.25MHz
3.58MHz / 4.43MHz
230V (220~240V) AC , 50Hz
116W(Avg.), 217W(Max)
Visible size: 66cm
Oiagonally measured
32.0kv + By (at zero beam current)
3.5cm round x 2, p10cm round x2 (82)
20W + 20W
——_—}—
External
EXT-1 / EXT-2 (INPUT/OUTPUT)
EXT-3 (INPUT)
Aerial Input Terminal
|
21-pin Euroconnector (SCART socket)
Video
1 1VP-P 752 (RCA pin jack)
Audio(L/R)
75Q Unbalanced, Coaxial
116W(Avg.), 218W(Max)
Visible size : 76cm
Diagonally measured
: 500mVrms (-4dBs) , High impedance (RCA pin jack)
Remote Control Unit
RM-C782 [Battery size ; UM-4
AAA
IECR
Design & specification subject to change without notice.
03 1.5V x2]
%
Manufactured under license from Dolby Laboratories Licensing Corporation.
"Dolby" and the double-D symbol {0 are trademarks of Dolby Laboratories Licensing Corporation.
2-2 (No.51108)
SAFETY PRECAUTIONS
1.
The design of this product contains special hardware, many
Gircuils and Components specially for safely Purposes.
For continued protecuon, no changes should be made to the
original design unless authorized in writing by the manufactur-
er. Replacement paris must be identical io those used in the
original circuits. Service should be performed by qualified per-
sonnel only.
Alterations of the design or circuitry of the products should not
be made.
Any design alterations or additions will void the
manufacturer's warranty and will further relieve the manufac-
turer of responsibility for personal injury or property damage
resulting therefrom.
Many electrical and mechanical
parts in the products have
special safety-related characteristics. These characteristics are
often not evident from visual inspection nor can the protection
afforded by them necessarily be obtained by using replace-
ment components rated for higher voltage, wattage, eic. Re-
placement parts which have these special safety characteris-
tics are identified in the parts list of Service manual. Electri-
cal components
having such features are identified by
shading on the schematics and by ( as )on the parts list
in Service
manual.
The use of a substitute replacement
which does not have the same safety characteristics as the
recommended replacement part shown in the parts list of Ser-
vice manual may cause shock, fire, or other hazards.
Don't short between the LIVE side ground and ISOLAT-
ED(NEUTRAL) side ground or EARTH side ground when
repairing.
Some model's power circuit is partly dillerent in the GND. The
difference of the GND is shown by the LIVE : (_L) side GND,
the ISOLATED(NEUTRAL) : ¢J-) side GND and EARTH : @)
side GND. Don't short between the LIVE side GND and ISO-
LATED(NEUTRAL) side GND or EARTH side GND and nev-
er measure with a measuring apparatus (oscilloscope etc.) the
LIVE side GND and ISOLATED(NEUTRAL)
side GND
or
EARTH side GND at the same time.
If above note will not be kept, a fuse or any parts will be
broken.
\f any repair has been made to the chassis, it is recommended
that the B1 setting should be checked or adjusted (See AD-
JUSTMENT OF B, POWER SUPPLY).
The high voltage applied to the picture tube must conform with
that specified in Service manual. Excessive high vollage can
cause an increase
in X-Ray emission,
arcing and possible
component damage, therefore operation under excessive high
voltage conditions should be kept to a minimum, or should be
prevented. If severe arcing occurs, remove the AC power im-
mediately and determine the cause by visuai inspection (incor-
rect installation, cracked or melted high voltage harness, poor
soldering, etc.). To maintain the proper minimum level of soft
X-Ray emission, components in the high voltage circuitry in-
cluding the picture tube must be the exact replacements or al-
ternatives approved by the manufacturer of the compiete prod-
uct.
Do not check high voltage by drawing an arc. Use a high voit-
age meter or a high voltage probe with a VTVM.
Discharge
the picture lube before attempting meter connection, by con-
necting a clip !ead to the ground frame and connecting
the
other end of the lead through a 10kQ 2W resistor lo the an-
ode button.
When service is required, observe the original lead dress. Ex-
tra precaution should be given to assure Correct lead dress in
the nigh voltage circuit area. Where a short circuit has oc-
curred, those components that indicate evidence of overheat-
ing should be replaced. Always use the manufacturer's re-
placement componenis.
Q)
AV-28WX1EP
AV-32WX1EP
isolation Check
(Salely (or Electrical Shock Hazard)
After re-assembling the product, always perform an isolation
check
on
the exposed
metal paris
of the cabinet
(antenna
ter-
minals, video/audio input and output terminals, Control knobs,
metal cabinet, screwheads, earphone jack, contro! shafts, etc.)
to be sure the product is safe to operate without danger of
electrical shock.
Dielectric Strength Test
The isolation between the AC primary circuit and all metal!
parts exposed to the user, particularly any exposed metal part
having a return path to the chassis should withstand a voltage
of 3000V AC (r.m.s.) for a period of one second.
(. ... Withstand a voltage of 1100V AC (r.m.s.) to an appli-
ance rated up to 120V, and 3000V AC (r.m.s.) to an appli-
ance rated 200V or more, for a period of one second.)
This method of test requires a test equipment not generally
found in the service trade.
Leakage Current Check
Plug the AC line cord directly into the AC outlet (do not use a
line isolation transformer during this check.). Using a "Leak-
age Current Tester", measure the leakage current from each
exposed metal part of the cabinet, particularly any exposed
metal part having a relurn path to the chassis, to a known
good earth ground
(water pipe, etc.). Any leakage current
must not exceed 0.5mMA AC (r.m.s.).
© Alternate Check Method
Piug the AC line cord directly into the AC outlet (do not use a
line isolation transformer during this check.). Use an AC volt-
meter having 1000 ohms per volt or more sensitivity in the fol-
lowing manner. Connect a 15002 10W resistor paralleled by
a 0.15yF AC-type capacitor between an exposed metal part
and a known good earth ground (water pipe, etc.). Measure
the AC voltage across the resistor with the AC voltmeter.
Move the resistor connection to each exposed metal part, par-
ticularly any exposed metal part having a return path fo the
chassis, and measure
the AC voltage across the resistor.
Now, reverse the plug in the AC outlet and repeat each mea-
surement. Any voltage measured must not exceed 0.35V AC
(r.m.s.). This corresponds to 0.5MA AC (r.m.s.).
AC VOLTMETER
(HAVING 10009/V,
OR MORE SENSITIVITY)
D.15uF AC-TYPE
|
1500 10W
GOOD EARTH GROUND
PLACE THIS PROBE
ON EACH EXPOSED
METAL PART
Fig.A
(No.§1108) 2-3
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