TX-21JT1P, TC-21JR1P, TX-14JT1P, TC-14JR1P - Panasonic TV Service Manual (repair manual)

(Information in brackets {} refer to TX-14JT1P,TC-14JR1P)

220-240V a.c., 50Hz

72W   {47W}

1,1W

75

Ω unbalanced, Coaxial Type

PAL B/G, D/K,PAL-60
SECAM B/G, D/K

Receiving Channels:
VHF E2-E12

    VHF H1-H2 (ITALY)

VHF A-H (ITALY)

    UHF E21-E69       

CATV (S01-S05)                  CATV S1-S10 (M1-M10)

      

CATV S11-S20 (U1-U10)     CATV S21-S41(HYPERBAND)
VHF R1-R2

 VHF R3-R5

VHF R6-R12

Intermediate Frequency:
Video/Audio
Video

38,9 MHz

Audio

33,4 MHz, 32,4 MHz

Colour

34,47 MHz(PAL)
34,5 MHz(SECAM)
34,65 MHz(SECAM)

Terminals:
AV1 IN

Video (21 pin) 1V p-p  75

Ω

Audio (21 pin) 500mVrms 10k

Ω

RGB (21 pin)

AV1 OUT

Video (21 pin) 1V p-p  75

Ω

Audio (21 pin) 500mV rms 1k

Ω

RCA IN

Video  1V p-p 75

Ω

   RCA IN

Audio  500mV rms 10k

Ω

 26,7kV ±1kV   {22,7kV ±1kV}

A51EAL155X13    51cm
{A34EAC01X13   34cm}

6W (M.P.O.)
3W (R.M.S.)
8

Ω Impedance

8

Ω Impedance

Remote Control
2 x R6 (UM3) Batteries

Dimensions:
Height:

476mm

{352mm}

Width:

512mm

{371mm}

Depth:

470mm

{371,5mm}

20,6kg

{9,5kg}

Specifications are subject to change without notice.
Weights and dimensions shown are approximate.

NOTE:    This Service Manual should be used in
conjunction with the Z7 Technical guide.

ORDER No. 00-SM-005

SAFETY PRECAUTIONS..........................................................................................................................................................2
SERVICE HINTS .......................................................................................................................................................................3
ADJUSTMENT PROCEDURE AND FACTORY SETTINGS .....................................................................................................4
WAVEFORM PATTERN TABLE ...............................................................................................................................................5
ALIGNMENT SETTINGS...........................................................................................................................................................6
BLOCK DIAGRAMS ..................................................................................................................................................................7
PARTS LOCATION .................................................................................................................................................................10
REPLACEMENT PARTS LIST ................................................................................................................................................11
SCHEMATIC DIAGRAMS .......................................................................................................................................................20
CONDUCTOR VIEWS.............................................................................................................................................................27

1.  It is advisable to insert an isolation transformer in the

a.c. supply before servicing a hot chassis.

2.  When servicing, observe the original lead dress in the

high voltage circuits. If a short circuit is found, replace
all parts that have been overheated or damaged by
the short circuit.

3.  After servicing, see that all the protective devices

such as insulation barriers, insulation papers, shields
and isolation R-C combinations are correctly
installed.

4.  When the receiver is not being used for a long period

of time, unplug the power cord from the a.c. outlet.

5.  Potentials as high as 27,7kV {23,7kV} are 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 familiar with the precautions necessary when
working on high voltage equipment. Always
discharge the anode of the tube.

6.  After servicing make the following leakage current

checks to prevent the customer from being exposed
to shock hazard.

1.  Unplug the a.c. cord and connect a jumper between

the two prongs of the plug.

2.  Turn on the receiver’s power switch.
3.  Measure the resistance value with an ohmmeter,

between the jumpered a.c. plug and each exposed
metallic cabinet part on the receiver, such as screw
heads, aerials, connectors, control shafts etc. When
the exposed metallic part has a return path to the
chassis, the reading should be between 4M ohm and
20M ohm. When the exposed metal does not have a
return path to the chassis, the reading must be
infinite.

1.  Plug the a.c. cord directly into the a.c. outlet. Do not

use an isolation transformer for this check.

2. Connect 

a 

2k

Ω 10W resistor in series with an

exposed metallic part on the receiver and an earth,
such as a water pipe.

3.  Use an a.c. voltmeter with high impedance to

measure the potential across the resistor.

4.  Check each exposed metallic part and check the

voltage at each point.

5.  Reverse the a.c. plug at the outlet and repeat each of

the above measurements.

6.  The potential at any point should not exceed

1,4Vrms. In case a measurement is outside the 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.

1.  The potential sources of X-Radiation in TV sets are

the high voltage section and the picture tube.

2.  When using a picture tube test jig for service, ensure

that the jig is capable of handling 27,7kV {23,7kV}
without causing X-Radiation.

 It is important to use an accurate periodically

calibrated high voltage meter.
1.  Set the brightness to minimum.
2.  Measure the high voltage. The meter should indicate

 26,7kV  ± 1kV   {22,7kV ± 1kV}.

 If the meter indication is out of tolerance, immediate
service and correction is required to prevent the possibility
of premature component failure.
3.  To prevent any X-Radiation possibility, it is essential

to use the specified tube.

(EARTH)

Ω

Ω

Ω

Ω 10 Watts

1.  Remove the 5 screws as shown in 

  Confirm the following voltages.

10

± 1V

TPE11 -13,2

± 1V

5,2

± 0,3V

{-13,8 ± 1V}

13

± 1V

TPE12 13,2

± 1,5V

{13,5

± 1V}

{12,8

± 1,5V}

21,5

± 1,5V

TPE13 125

± 1,5V

{20,5

± 1,5V}

{104

± 1,5V}

5

± 0,3V

TPE14 7,9

± 1V

9

± 1V

TPE18 8,2

± 1V

30,4

± 2,5V

{8,1

± 1V}

{31

± 2,5V}

TPE19 31

± 1V

TPE10 191

± 10V

{30,6

± 1,5V}

{147

± 10V}

1. Operate the TV set, pattern crosshatch.
2. Set the controls :

Brightness

Minimum

Contrast

Minimum

Volume

Minimum

To return customer settings to factory settings and clear owner ID of all information input by the customer, enter Self-Check
mode. Press the down (-/v) button on the customer controls at the front of the TV set, at the same time pressing the STATUS
button

on the remote control. To exit Self Check, switch off the TV set at the power button.

To aid in the service of our current chassis there are a number of Service Aids which have been made available.
•  LUCI interface kit (Linked Utility Computer Interface)

Part number: TZS6EZ002
This contains interface and cables for connecting TV service connector and a PC as well as diagnostic software. As new
models are introduced upgrade software will become available.

•  VICI (Visual Interactive Computer Information)

These C.D.'s contain multimedia documentation providing quick access to service information.
Part No. TZS7EZ006, TZS7EZ005, TZS8EZ001& TZS9EZ001
1. Service Manuals
2. Instruction Books
3. Technical Information

•  TASMIN (Technically Advanced System for Multimedia Interactive Notes)

As well as providing a first step towards more interactive training this product also achieves quick access to Technical
Information.

OPTION F7

NOTE: Self Check should only be used when refurbishing the TV set and not during normal repair work.