TX-15PM30T, TC-21X3, TX-21X3T - Panasonic TV Service Manual (repair manual)

tx-15pm30t, tc-21x3, tx-21x3t service manual
Model
TX-15PM30T TC-21X3 TX-21X3T
Pages
28
Size
2.37 MB
Type
PDF
Document
Service Manual
Brand
Device
TV / MX-7
File
tx-15pm30t-tc-21x3-tx-21x3t.pdf
Date

View Panasonic TX-15PM30T / TC-21X3 / TX-21X3T Service Manual online

Service Manual
Colour Television
  
TX-15PM30T
    
MX-7 Chassis
Specifications
Power Source : AC AUTO 110-240V, 50/60Hz
Video / Audio Terminals :
FAV In :  Video In 1 Vp-p 75           
Power Consumption : 69W
Audio In Approx, 400mVrms
RAV In : Video In 1 Vp-p 75           
Aerial Impedance:75    unbalanced
Audio In Approx, 400mVrms
 Coaxial type
Monitor Out :Video Out1 Vp-p 75        
Audio OutApprox, 400mVrms
Receiving System : 17 System
Receiving Channels :
High Voltage : 27.5 kV ( +/- 1.0 )
VHF
2-2 
(PAL/SECAM B,K1)
 at zero beam current
0-12  (PAL B AUST)
1-9
(PAL B N.Z)
Picture Tube : A36LTN194X
1-12  (PAL/SECAM D)
36cm (15 inches)
1-12  (NTSC M JAPAN)
Measured diagony, 90  deflection
2-13 (NTSC M U.S.A)
 
UHF
21-69 (PAL G,H,I/SECAM G,K,K1)
28-69 (PAL B AUST)
Audio Output : 2W x 2 = 4W
13-57 (PAL D,K)
13-62 (NTSC M JAPAN)
       
14-69 (NTSC M U.S.A)
CATV
S1-S41(OSCAR)
Dimensions :  Height  : 373.5 mm
1-125 (U.S.A CATV)
Width  : 485.0 mm
C13-C41(JAPAN)
Depth  : 380.0 mm
S21-S41 (HYPER)
Z1-Z37   (CHINA)
Mass : 12.5 kg
Intermediate Frequency :
Video
38.0 MHz
Specifications are subject to change without 
Sound
31.5 MHz (D,K) / 32.5MHz (B,G)
notice.Mass and dimensions shown are approxi
32.0 MHz (I) / 33.5MHz (M)
mate.
Colour
33.57 MHz (PAL)
33.6 MHz (SECAM)
33.75 MHz (SECAM)
34.42 MHz (NTSC)
Panasonic
             ORDER NO. MTV0008150C3
c
 
 
°
Contents
.Safety Precautions ........................................................................................ 2
.MX-7 Chassis Block Diagram .................................................................... 4
.Service Hints ................................................................................................. 5
.Adjustments ...................................................................................................7
.Conductor Views ........................................................................................... 13
.Schematic Diagrams .................................................................................... 15
.Parts Location ............................................................................................... 18
.Replacement Part List ................................................................................. 19 
 
This service literature is designed for experienced repair technicians only and is not designed for use by the
general public. It does not contain warning cautions to advise non-technical individuals of potential dangers in
attempting to service a product. Product powered by electricity should be serviced or repaired only by 
experienced professional technicians. Any attempt to service or repair the product or products dealt with in this
service literature by anyone else could result in serious injury or death.
WARNING
!
Safety Precautions
General Guide Lines
1. It is advisable to insert an isolation transformer in the AC supply before servicing this hot chassis.
2. When servicing, observe the original lead dress, especially the lead dress in the high voltage circuits. If 
a short circuits is found, replace all parts which have been overheated or damaged by the short circuit.
3. After servicing, see to it that all the protective devices such as insulation barriers, insulation papers, 
shields, and isolation R-C combinations, are properly installed.
4. When the receiver is not to be used for a long period of time, unplug the power cord from the AC cord 
outlet.
5. Potential, as high as 28.5kV. is present when this receiver is in operation. Operation of the receiver 
without the rear cover involves the danger of a shock hazard from the receiver power supply. Servicing 
should not be attempted by anyone who is not thoroughly familiar with the precautions necessary when 
working on high voltage equipment. Always discharge the anode of the picture tube to the receiver 
chassis before handling the tube.
After servicing make the following leakage current checks to prevent the customer from being exposed 
to shock hazards.
Leakage Current Cold Check
1. Unplug the AC cord and connect a jumper between the two prongs on the plug.
2. Turn on the receiver’s power switch.
Measure the resistance value, with an ohmmeter, between the jumper AC plug and each exposed metal-
lic cabinet part on the receiver, such as screw heads, aerials, connectors, control shafts, ect. When the 
exposed metallic part has a return path to the chassis, the reading should be between 4 Mohm and 20 
Mohm.When the exposed metal does not have a return path to the chassis, the reading must be infinite.
Leakage Current Hot Check ( Fig.1 )
1. Plug the AC cord directly into the AC outlet. Do not use an isolation transformer for this check.
2. Check a 2 kohm non-inductive resistor and an AC/DC current meter, in series with each exposed 
metallic part on the receiver in turn and an earth such as a water pipe.
The current from any point should not exceed 0.7 mA peak AC or 2mA DC. In the case of a measure-
ment being outside of these limits specified, there is a possibility of a shock hazard, and the receiver 
should be repaired and rechecked before it is returned to the customer.
Fig.1
X-Radiation
Warning :
The potential sources of X-Radiation in TV set
are the EHT section and the picture tube.
When using a picture tube test jig for service,
ensure that jig is capable of handling 28.5kV
without causing X-Radiation.
Note : It is important to use an accurate 
  periodically calibrated high voltage
  meter.
1. Set the brightness to minimum.
2. Use the remocon to get into Service Mode.
3. Measure the EHT. The meter reading should
 
    indicate 27.5(+-1.0)kV. If the meter 
    indication is out of tolerance, immediate
 
    service and correction is required to prevent
    the possibility of premature component failure.
4. To prevent the possibility X-Radiation, it is
    essential to use the specifield picture tube, if
    service replacement becomes necessary.
MX-7 Chassis Block Diagram
Page of 28
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Download Panasonic TX-15PM30T / TC-21X3 / TX-21X3T Service Manual (Repair Manual)

Here you can view online and download Panasonic TX-15PM30T / TC-21X3 / TX-21X3T Service Manual in PDF. TX-15PM30T / TC-21X3 / TX-21X3T service manual will guide through the process and help you recover, restore, fix, disassemble and repair Panasonic TX-15PM30T / TC-21X3 / TX-21X3T TV. Information contained in service manuals typically includes schematics / circuit diagrams, wiring diagrams, block diagrams, printed wiring boards, exploded views, parts list, disassembly / assembly, pcb.

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