DOWNLOAD Panasonic TX-32PK3 Service Manual ↓ Size: 10.62 MB | Pages: 39 in PDF or view online for FREE

SAFETY PRECAUTIONS..........................................................................................................................................................2

SERVICE HINTS .......................................................................................................................................................................3

SERVICE POSITION.................................................................................................................................................................4

ADJUSTMENT PROCEDURE AND FACTORY SETTINGS .....................................................................................................5

WAVEFORM PATTERN TABLE ...............................................................................................................................................6

ALIGNMENT SETTINGS...........................................................................................................................................................7

BLOCK DIAGRAMS ..................................................................................................................................................................8

PARTS LOCATION .................................................................................................................................................................12

REPLACEMENT PARTS LIST ................................................................................................................................................13

SCHEMATIC DIAGRAMS .......................................................................................................................................................24

CONDUCTOR VIEWS.............................................................................................................................................................28

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 32.5kV 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

1.4V rms. 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 32.5kV without
causing X-Radiation.

NOTE: It is important to use an accurate periodically
calibrated high voltage meter.
1.  Set the brightness to minimum.
2.  Measure the high voltage. The meter should indicate.

31.5kV

±

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

1. Remove the 10 screws as shown in Fig.2.

1. Remove the bead clamper from the mains lead and affix, using back cover screw, into top right-hand cabinet rib (A),

shown in Fig.4.

2. Remove 2 screws (B), as shown in Fig.5., and remove speaker assembly.

3. Hold and lift the rear of the chassis and gently pull the chassis toward you, as shown in Fig.4.

4. Release the respective wiring clips and rotate the chassis vertically through 90

°

, anti-clockwise.

5. Locate the base of the chassis frame into location (C), shown in Fig.6. / Fig.8.

6. Clip the chassis frame onto the bead clamper, shown in Fig.6. / Fig.7.

7. After servicing replace the bead clamper and speaker, and ensure all wiring is returned to its original position before 

returning the receiver to the customer.

1. Receive 

a 

Greyscale 

signal.

2.  Set the controls :-

Brightness

Minimum

Contrast

Minimum

Volume

Minimum

1.  Set the +B voltage up as follows:-

Adjust R811 so that B2 shows 148V ± 1V.

2.  Confirm the following voltages.

5

± 0,25V

5

±

0,25V

12

±

0,5V

33

±

1,5V

16

± 1V

8

±

0,5V

26

± 1V

5,5

±

0,5V

35

± 1V

15

±

1V

200

± 10V

-15

±

1V

1. Receive a Greyscale signal.
2. Degauss the tube externally.
3. Set the TV into Service Mode 1.
4. Select Cut off mode.

To adjust Cutoff connect an oscilloscope to the Blue
cathode. Press "STR" and adjust "cutoff" value using the
"Yellow" and "Blue" buttons until the black level is
160V ± 5V press "STR" to store the value.
Remove the oscilloscope.
Select Ug2 adjustment and adjust the screen VR until the
display shows "O.K."

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.

If the CCU ports have been checked and found to be incorrect or not located then " - - " will appear in place of "O.K.".

VDP

O.K.

TUN

O.K.

E2

O.K.

MSP

O.K.

DPL

- -

PCB

O.K.

Cab

O.K.

Sum

Factory use only

OPTION 1

00

OPTION 2

A1

OPTION 3

82

OPTION 4

60

OPTION 5

B1

OPTION 6

E9

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