DOWNLOAD Panasonic TX-37LZ70P / TX-R37LZ70 Service Manual ↓ Size: 14.85 MB | Pages: 79 in PDF or view online for FREE

Model
TX-37LZ70P TX-R37LZ70
Pages
79
Size
14.85 MB
Type
PDF
Document
Service Manual
Brand
Device
TV / LH64 CHASSIS
File
tx-37lz70p-tx-r37lz70.pdf
Date

Panasonic TX-37LZ70P / TX-R37LZ70 Service Manual ▷ View online

Service Manual
Colour LCD Television 
 
 
TX-37LZ70P 
TX-R37LZ70 
 
 
LH64 Chassis 
 
 
 
 
 
Specifications
    
 
 Power 
Source: 
220-240V AC, 50/60Hz 
 
Power Consumption 
 
188W  
 
 
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. PCZ0709108CE 
 
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:0,3V 
p-p 
75
Ω 
 Audio 
(RCAx2) 
 500mV rms 10k
Ω 
  
Video 
(RCAx1) 
 1V p-p 75
Ω 
 
 
HDMI1, HDMI2 
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 x1 
 
 
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:   
 
 
L5EDD9T00002 
          
 
 
 
 
 
1920 x 1080 XGA, 16:9 
 
 
 
 
 
Visible Diagonal 940mm          
 
  Audio 
Output: 
   
20W (2x10W) 
 
 Headphones: 
   
3,5mm, 
8
Ω Impedance 
 
 
Accessories supplied : 
 
Remote Control 
 
2 x R6 (UM3) Batteries 
 
 Dimensions: 
 
 
Height:      Width:       Depth:  
 
 
Including TV stand 
634mm      1031mm    300mm 
 
 
 
 
 
TV set only 
588mm      1031mm     120mm 
 
 
 
 
 Net 
weight: 
27kg        
 
 
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 
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 BYTES DESCRIPTION .............................. 15 
ADJUSTMENT METHOD ......................................... 16 
WIRING DIAGRAM ................................................... 17 
BLOCK DIAGRAMS.................................................. 18 
PARTS LOCATION................................................... 21 
REPLACEMENT PARTS LIST.................................. 23 
SCHEMATIC DIAGRAMS......................................... 45 
 
AP-BOARD (1 OF 2) SCHEMATIC DIAGRAM.... 46 
 
AP-BOARD (2 OF 2) SCHEMATIC DIAGRAM.... 47 
 
DG-BOARD (1 OF 15) SCHEM. DIAGRAM ........ 48 
 
DG-BOARD (2 OF 15) SCHEM. DIAGRAM ........ 49 
 
DG-BOARD (3 OF 15) SCHEM. DIAGRAM ........ 50 
 
DG-BOARD (4 OF 15) SCHEM. DIAGRAM ........ 51 
 
DG-BOARD (5 OF 15) SCHEM. DIAGRAM ........ 52 
 
DG-BOARD (6 OF 15) SCHEM. DIAGRAM ........ 53 
 
DG-BOARD (7 OF 15) SCHEM. DIAGRAM ........ 54 
 
DG-BOARD (8 OF 15) SCHEM. DIAGRAM ........ 55 
 
DG-BOARD (9 OF 15) SCHEM. DIAGRAM ........ 56 
 
DG-BOARD (10 OF 15) SCHEM. DIAGRAM ...... 57 
 
DG-BOARD (11 OF 15) SCHEM. DIAGRAM ...... 58 
 
DG-BOARD (12 OF 15) SCHEM. DIAGRAM ...... 59 
 
DG-BOARD (13 OF 15) SCHEM. DIAGRAM ...... 60 
 
DG-BOARD (14 OF 15) SCHEM. DIAGRAM ...... 61 
 
DG-BOARD (15 OF 15) SCHEM. DIAGRAM ...... 62 
 
H-BOARD (1 OF 5) SCHEMATIC DIAGRAM ...... 63 
 
H-BOARD (2 OF 5) SCHEMATIC DIAGRAM ...... 64 
 
H-BOARD (3 OF 5) SCHEMATIC DIAGRAM ...... 65 
      H-BOARD (4 OF 5) SCHEMATIC DIAGRAM...... 66 
 
H-BOARD (5 OF 5) SCHEMATIC DIAGRAM ...... 67 
 G-BOARD 
SCHEMATIC DIAGRAM .................... 68 
 GS-BOARD 
SCHEMATIC DIAGRAM.................. 69 
 S-BOARD 
SCHEMATIC DIAGRAM .................... 70 
 R-BOARD 
SCHEMATIC DIAGRAM .................... 71 
      V-BOARD SCHEMATIC DIAGRAM .................... 72 
CONDUCTOR VIEWS .............................................. 73 
 
 
 
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 
Fig. 1 
TO 
APPLIANCES 
EXPOSED 
METAL PARTS 
Resistance values in ohms (
Ω) 
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) 
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Panasonic TX-37LZ70P / TX-R37LZ70 Service Manual ▷ Download

  • DOWNLOAD Panasonic TX-37LZ70P / TX-R37LZ70 Service Manual ↓ Size: 14.85 MB | Pages: 79 in PDF or view online for FREE
  • Here you can View online or download the Service Manual for the Panasonic TX-37LZ70P / TX-R37LZ70 in PDF for free, which will help you to disassemble, recover, fix and repair Panasonic TX-37LZ70P / TX-R37LZ70 TV. Information contained in Panasonic TX-37LZ70P / TX-R37LZ70 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.