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Model
TX-37LX85F TX-37LX85L TX-37LX85P TX-32LX85F TX-32LX85L TX-32LX85P TX-R37LX85 TX-R32LX85
Pages
70
Size
16.41 MB
Type
PDF
Document
Service Manual
Brand
Device
TV / GLP23 CHASSIS
File
tx-37lx85f-tx-37lx85l-tx-37lx85p-tx-32lx85f-tx-32l.pdf
Date

Panasonic TX-37LX85F / TX-37LX85L / TX-37LX85P / TX-32LX85F / TX-32LX85L / TX-32LX85P / TX-R37LX85 / TX-R32LX85 Service Manual ▷ View online

Service Manual
Colour LCD Television
TX-37LX85F
TX-37LX85L
TX-37LX85P
TX-32LX85F
TX-32LX85L
TX-32LX85P
TX-R3
7LX85
TX-R3
2LX85
                                                          
GLP23 Chassis
Specifications
(Informations in brackets [ ] refers to model 32”)
      
Power Source:
220-240V AC, 50Hz
Power Consumption
180W [140W]
Stand-by Power Consumption: 0.4W
Aerial Impedance:
         75
Ω unbalanced, Coaxial Type
Receiving System:
PAL-I/H, B/G, D/K
 
SECAM B/G, D/K, L/L’
PAL-525/60 (AV only)
M.NTSC (AV only)
NTSC (AV only)
Receiving Channels:
VHF E2-E12
VHF H1-H2 (ITALY)
VHF A-H (ITALY)
VHF R1-R2
VHF R3-R5
VHF R6-R12
UHF E21-E69
CATV (S01-S05)
CATV S1-S10 (M1-M10)
CATV S11-S20 (U1-U10)
CATV S21-S41 (Hyperband)
            Operating Conditions:
Temperature:
0°C 
÷ 35°C
Humidity:   20% 
÷ 80% RH (non condensing)
Scanning format:
480i(60Hz), 480p(60Hz), 576i(50Hz), 576p(50Hz), 720p(60Hz), 720p(50Hz), 1.080i(60Hz),
1.080i(50Hz), 1.080p(60Hz), 1.080p(50Hz) ), 1.080p(24Hz)
  
PC signals:
VGA, SVGA, XGA, SXGA(compressed)
Horizontal scanning frequency
31 – 69 kHz
Vertical scanning frequency
59 – 86 Hz
ORDER No. PCZ0804035CE
WILLOUGHBY ROAD,
BRACKNELL,
BERKS.,
RG12 8FT.
Intermediate Frequency:
Video/Audio 
   
Video
38,9MHz, 33,9MHz
Audio
33,4MHz (B/G), 33,16MHz (A2)
33,05MHz (NICAM B/G, D/K, L’)
32,4MHz (D/K), 32,66MHz (CZ STEREO)
40,4MHz (L’), 39,75MHz (L’ NICAM)
Colour
34,47MHz (PAL)
34,5MHz, 34,65MHz (SECAM)
38,3MHz, 38,15MHz (SECAM L’)
            Terminals:
AV1 IN
Video (21 pin) 1V p-p 75
Ω
Audio (21 pin) 500mV rms 10k
Ω
RGB (21 pin) 0,7V p-p 75
Ω
AV1 OUT
Video (21 pin) 1V p-p 75
Ω
Audio (21 pin) 500mV rms 1k
Ω
AV2 IN
Video (21 pin) 1V p-p 75
Ω
Audio (21 pin) 500mV rms 10k
Ω
RGB (21 pin) 0,7V p-p 75
Ω
S-video IN (21-pin)Y: 1V p-p 75
Ω
C:0,3V p-p 75
Ω
AV2 OUT
Video (21 pin) 1V p-p 75
Ω
Audio (21 pin) 500mV rms 1k
Ω
AV3 IN
S-Video IN (4-pin) Y: 1V p-p 75
Ω
                             C:0,286V p-p 75
Ω
Audio (RCAx2) 500mV rms 10k
Ω
Video (RCAx1) 1V p-p 75
Ω
HDMI1, HDMI2, HDMI3
Type A Connector
COMPONENT 
Video (RCAx3) Y:1V p-p 75
Ω (including synchronization)
Pb, Pr: ±0,35V p-p 75
Ω
AUDIO IN
Audio (RCAx2) 500mV rms 10k
Ω (for YUV; HDMI1)
AUDIO OUT
Audio (RCAx2) 500mV rms 1k
Ω (high Impedance) 
CARD SLOT                                 SD CARD slot 
×1
PC
HIGH-DENSITY D_SUB 15PIN  R,G,B: 700mV p-p 75
Ω
HD,VD:TTL Level 2-5V p-p (high impedance)
LCD screen:
L5EDD9Q00004     [L5EDD8Q00040]
1366 x 768 XGA, 16:9
Visible Diagonal 940mm    [800mm]
Audio Output:
20W (2x10W)
Headphones:
3,5mm (M3), 8
Ω Impedance
Accessories supplied :
Remote Control
2 x R6 (UM3) Batteries
Dimensions:
Height:
Width:
Depth:
Including TV stand
645mm
940mm 
294mm
[572mm]
[820mm] [250mm]
TV set only
605mm
940mm  
120mm
[534mm]
[820mm] [119mm]
Net weight:
             Including TV stand                        21.0kg
[17.0kg]
             TV set only                                   
 17.5kg        [14.0kg]
            Specifications are subject to change without notice.
Weights and dimensions shown are approximate.
This service information is designed for experienced repair technicians only and is not designed for use by the general public. It does not
contain warnings or cautions to advise non-technical individuals of potencial dangers in attempting to service a product. Products
powered by electricity should be serviced or repaired only by experienced professional technicians. Any attempt to service or repair the
product or products deal within this service information by anyone else could result in serious injury or death.
Warning
2
CONTENTS
SAFETY PRECAUTIONS .......................................................................... 4
GENERAL GUIDE LINES..................................................................... 4
TOUCH – CURRENT CHECK.............................................................. 4
PREVENTION OF ELECTROSTATIC DISCHARGE (ESD)
TO ELECTROSTATICALLY SENSITIVE (ES) DEVICES .......................... 5
ABOUT LEAD FREE SOLDER (PBF)........................................................ 6
SUGGESTED PB FREE SOLDER....................................................... 6
APPLICABLE SIGNALS............................................................................. 7
SERVICE HINTS ....................................................................................... 8
CHASSIS BOARD LAYOUT ...................................................................... 9
LOCATION OF LEAD WIRING…………………………………………….9
SETTING INSPECTION........................................................................... 10
SELF-CHECK .......................................................................................... 11
POWER LED BLINKING TIMING CHART ............................................... 12
SERVICE MODE FUNCTION .................................................................. 13
SERVICE ................................................................................................ 14
OPTION DESCRIPTION.......................................................................... 15
ADJUSTMENT METHOD ........................................................................ 16
WIRING DIAGRAM.................................................................................. 17
BLOCK DIAGRAMS................................................................................. 18
PARTS LOCATION.................................................................................. 21
REPLACEMENT PARTS LIST................................................................. 23
SCHEMATIC DIAGRAMS........................................................................ 4
4
A-BOARD (1 OF 17) SCHEMATIC DIAGRAM ................................... 4
5
P-BOARD SCHEMATIC DIAGRAM ................................................... 6
2
G-BOARD SCHEMATIC DIAGRAM................................................... 63
V-BOARD SCHEMATIC DIAGRAM ................................................... 64
      K-BOARD SCHEMATIC DIAGRAM ................................................... 65
CONDUCTOR VIEWS ............................................................................. 66
3
Safety Precautions
General Guide Lines
1.  When servicing, observe the original lead dress. If a short circuit is found, replace all parts which have been overheated
or damaged by the short circuit.
2.    After servicing, see to it that all the protective devices such as insulation barriers, insulation papers shields are properly
       installed.
3.    After servicing, make the following touch current checks to prevent the customer from being exposed to shock hazards.
4.    Always ensure panel TKP0E16001 is correctly replaced before returning to customer (see Fig.1).
Touch-Current Check
1.  Plug the AC cord directly into the AC outlet. Do not use an isolation transformer for this check.
2.  Connect a measuring network for touch currents between each exposed metallic part on the set and a good earth
ground such as a water pipe, as shown in Fig. 2.
3.  Use Leakage Current Tester (Simpson 228 or equivalent) to measure the potential across the measuring network.
4.  Check each exposed metallic part, and measure the voltage at each point.
5.  Reserve the AC plug in the AC outlet and repeat each of the above measure.
6.  The potential at any point (TOUCH CURRENT) expressed as voltage U1 and U2, does not exceed the following values:
For a. c.: U1 = 35 V (peak) and U2 = 0.35 V (peak);
For d. c.: U1 = 1.0 V,
Note:
The limit value of U2 = 0.35 V (peak) for a. c. and U1 = 1.0 V for d. c. correspond to the values 0.7 mA (peak) a. c. and
2.0 mA d. c.
The limit value U1 = 35 V (peak) for a. c. correspond to the value 70 mA (peak) a. c. for frequencies greater than 100
kHz.
7.  In case a measurement is out of the limits specified, there is a possibility of a shock hazard, and the equipment should
be repaired and rechecked before it is returned to the customer.
Fig. 2
4
TO
APPLIANCES
EXPOSED
METAL PARTS
Resistance values in ohms (
Ω)
V
R
0
=500
Ω
R
S
=1500
Ω
C
S
=0.22
μF
10k
Ω
0.022
μF
U
1
COLD
WATER PIPE
(EARTH GROUND)
V: Voltmetr or oscilloscope
(r.m.s. or peak reading)
Measuring network for TOUCH CURRENTS
Input resistance: 
≥ 1MΩ
Input capacitance:
 ≤ 200pF
Frequency range: 15Hz to 1MHz and d.c.respectively
NOTE – Appropriate measures should be taken to obtain the correct value in case of non-sinusoidal waveforms
U
2
 (V)
Fig. 1
Page of 70
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Panasonic TX-37LX85F / TX-37LX85L / TX-37LX85P / TX-32LX85F / TX-32LX85L / TX-32LX85P / TX-R37LX85 / TX-R32LX85 Service Manual ▷ Download

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  • Here you can View online or download the Service Manual for the Panasonic TX-37LX85F / TX-37LX85L / TX-37LX85P / TX-32LX85F / TX-32LX85L / TX-32LX85P / TX-R37LX85 / TX-R32LX85 in PDF for free, which will help you to disassemble, recover, fix and repair Panasonic TX-37LX85F / TX-37LX85L / TX-37LX85P / TX-32LX85F / TX-32LX85L / TX-32LX85P / TX-R37LX85 / TX-R32LX85 TV. Information contained in Panasonic TX-37LX85F / TX-37LX85L / TX-37LX85P / TX-32LX85F / TX-32LX85L / TX-32LX85P / TX-R37LX85 / TX-R32LX85 Service Manual (repair manual) includes:
  • Disassembly, troubleshooting, maintenance, adjustment, installation and setup instructions.
  • Schematics, Circuit, Wiring and Block diagrams.
  • Printed wiring boards (PWB) and printed circuit boards (PCB).
  • Exploded View and Parts List.