Panasonic TC-14Z88RQ User manual

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Table Of Contents
COVER
1 Safety Precautions
1.1 General Guide Lines
1.2 Leakage Current Cold
Check
1.3 Leakage Current Hot
Check (Fig. 1)
1.4 X-Radiation
1.5 GP3 Chassis Block
Diagram
2 Service Hints
2.1 Service Position for E-
Board
2.2 Factory Mode Adjustment
2.3 Adjustment for White
Balance
2.4 Adjustment for CRT CUT
OFF
2.5 Adjustment Procedure
2.6 PAL Colour
2.7 Adjustment
3 Conductor Views
4 Schematic Diagram
4.1 A BOARD
4.1.1 A BOARD (1 / 5)
4.1.2 A BOARD (2 / 5)
4.1.3 A BOARD (3 / 5)
4.1.4 A BOARD (4 / 5)
4.1.5 A BOARD (5 / 5)
4.2 L BOARD
4.2.1 L BOARD (1 / 2)
4.2.2 L BOARD (2 / 2)
5 Part Location
6 Replacement Parts List
6.1 Replacement Parts List
Service Manual
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ORDER NO. MTV0308269C3
Colour Television
●TC-14Z88RQ
GP3 Chassis
Specifications
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Power Source : AC AUTO 110-240V, 50/60 Hz
Power
Consumption : 61W
Aerial Impedance : 75Ωunbalanced
Coaxial type
Receiving System : 17 Systems
Receiving
Channels :
VHF 1-11 PAL B (Australia& N.Zealand)
1-12 PAL/SECAM D
1-12 NTSC M JAPAN
2-12 PAL/SECAM B, G
2-13 NTSC M U.S.A.
UHF 21-69 PAL G I/SECAM B, G, K1
28-69 PAL G (Australia)
13-56 PAL D
13-52 NTSC M JAPAN
14-69 NTSC NTSC M U.S.A.
CATV S1-S41 (Hyper)
Intermediate Frequency :
Video 38.0 MHz
Sound 31.5 MHz (D, K, K1)
32 MHz (I)
32.5 MHz (B, G)
33.5 MHz (M)
Colour 33.57 MHz (PAL)
33.6 MHz (SECAM)
33.75 MHz (SECAM)
34.42 MHz (NTSC)
Video/ Audio Terminals :
RAV In Video In 1 Vp-p 75Ω
Audio In Approx. 400mVrms
Monitor Out Video Out 1 Vp-p 75Ω
Audio Out Approx. 400mVrms
High Voltage : 24.5kV± -1.5
at zero beam current
Picture Tube : A34KQW42X
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34cm (14 inches)
Measured diagonally,
90° deflection
Audio Output : 5.0W
Dimensions : Height : 356.0 mm
Width : 459.0 mm
Depth : 379.5 mm
Mass : 10.1 kg (Net Wt.)
Specifications are subject to change without notice.
Mass and dimensions shown are approximate.
© 2003 Matsushita Electric Industrial Co., Ltd. All rights reserved. Unauthorized copying and distribution is a violation of law.
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Service Manual
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ORDER NO. MTV0308269C3
Colour Television
●TC-14Z88RQ
GP3 Chassis
Specifications
Power Source : AC AUTO 110-240V, 50/60 Hz
Power
Consumption : 61W
Aerial Impedance : 75Ωunbalanced
Coaxial type
Receiving System : 17 Systems
Receiving
Channels :
VHF 1-11 PAL B (Australia& N.Zealand)
1-12 PAL/SECAM D
1-12 NTSC M JAPAN
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2-12 PAL/SECAM B, G
2-13 NTSC M U.S.A.
UHF 21-69 PAL G I/SECAM B, G, K1
28-69 PAL G (Australia)
13-56 PAL D
13-52 NTSC M JAPAN
14-69 NTSC NTSC M U.S.A.
CATV S1-S41 (Hyper)
Intermediate Frequency :
Video 38.0 MHz
Sound 31.5 MHz (D, K, K1)
32 MHz (I)
32.5 MHz (B, G)
33.5 MHz (M)
Colour 33.57 MHz (PAL)
33.6 MHz (SECAM)
33.75 MHz (SECAM)
34.42 MHz (NTSC)
Video/ Audio Terminals :
RAV In Video In 1 Vp-p 75Ω
Audio In Approx. 400mVrms
Monitor Out Video Out 1 Vp-p 75Ω
Audio Out Approx. 400mVrms
High Voltage : 24.5kV± -1.5
at zero beam current
Picture Tube : A34KQW42X
34cm (14 inches)
Measured diagonally,
90° deflection
Audio Output : 5.0W
Dimensions : Height : 356.0 mm
Width : 459.0 mm
Depth : 379.5 mm
Mass : 10.1 kg (Net Wt.)
Specifications are subject to change without notice.
Mass and dimensions shown are approximate.
© 2003 Matsushita Electric Industrial Co., Ltd. All rights reserved. Unauthorized copying and distribution is a violation of law.
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1.1 General Guide Lines
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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 circuit 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 26.0kV 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 byanyone 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 leakagecurrent checks to prevent the customer from being exposed to shock hazards.
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1.2 Leakage Current Cold Check
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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
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 4
MΩand 20 MΩ. When the exposed metal does not have a return path to the chassis, the reading
must be infinite.
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1.3 Leakage Current Hot Check (Fig. 1)
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1. Plug the AC cord directly into the AC outlet. Do not use an isolation transformer for this check.
2. Check a 2 kΩnon-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 2 mA DC. In the case of a
measurement 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 returnedto the customer.
Fig. 1
,
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1.4 X-Radiation
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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 26.0kV 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 24.5±-1.5kV . 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 specified picture tube, if service
replacement becomes necessary.
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1.5 GP3 Chassis Block Diagram
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