Panasonic TX-R37LX86K Service Manual ▷ View online
TX-R37LX86K
LH76 Chassis
LCD TV
Specifications
Power Source :
AC 220-240 V, 50/60 Hz
Power Consumption
Average Use
185 W
Standby condition
0.3 W
Display panel
Aspect Ratio
16:9
Visible screen size
819 mm (W) × 460 mm (H)
(No. of pixels)
1,049,088 (1,366 (W) × 768 (H))
Sound
Speaker
160 mm × 42 mm × 2 pcs, 8
Ω
Audio Output
20 W (10 W + 10 W), 10% THD
Headphones
M3 (3.5 mm) stereo mini Jack × 1
PC signals
VGA, SVGA, XGA
SXGA ...... (compressed)
Horizontal scanning frequency 31 - 69 kHz
Vertical scanning frequency 59 - 86 Hz
Receiving Systems / Band name
SYSTEMS
FUNCTIONS
———————————————————————————————————————
1
PAL B, G, H
2
PAL I
Reception
of broadcast
playback from
video cassette tape
recorders.
3
PAL D, K
4
SECAM B, G
5
SECAM D, K
6
SECAM K1
7
NTSC M (NTSC 3.58 / 4.5 MHz)
———————————————————————————————————————
ORDER NO. MTV0801646CE
8
NTSC 4.43 / 5.5 MHz
Playback from
special VCR’s or DVD.
9
NTSC 4.43 / 6.0 MHz
10
NTSC 4.43 / 6.5 MHz
11
NTSC 3.58 / 5.5 MHz
12
NTSC 3.58 / 6.0 MHz
13
NTSC 3.58 / 6.5 MHz
14
SECAM I
———————————————————————————————————————
15
PAL 60 Hz / 5.5 MHz
Playback from
Special Disc Players
and Special VCR’s or DVD.
16
PAL 60 Hz / 6.0 MHz
17
PAL 60 Hz / 6.5 MHz
Aerial - Rear
VHF / UHF
Operation Conditions
Temperature : 0°C - 35°C
Humidity : 20% -- 80% RH (non-condensing)
Connection Terminals :
AV1
AUDIO L-R
RCA PIN Type × 2
0.5 V[rms]
Input
VIDEO
RCA PIN Type × 1
1.0 V[p-p] (75
Ω )
COMPONENT
Y
1.0 V[p-p] (including synchronization)
P
B
/ C
B
, P
R
/ C
R
±0.35 V[p-p]
AV2
AUDIO L-R
RCA PIN Type × 2
0.5 V[rms]
Input
VIDEO
RCA PIN Type × 1
1.0 V[p-p] (75
Ω )
COMPONENT
Y
1.0 V[p-p] (including synchronization)
P
B
/ C
B
, P
R
/ C
R
±0.35 V[p-p]
AV3
AUDIO L-R
RCA PIN Type × 2
0.5 V[rms]
Input
VIDEO
RCA PIN Type × 1
1.0 V[p-p] (75
Ω )
S VIDEO
Mini DIN 4-pin
Y: 1.0 V[p-p] (75
Ω) C: 0.286 V[p-p] (75 Ω)
AV4
AUDIO L-R
RCA PIN Type × 2
0.5 V[rms]
Input
VIDEO
RCA PIN Type × 1
1.0 V[p-p] (75
Ω )
S VIDEO
Mini DIN 4-pin
Y: 1.0 V[p-p] (75
Ω) C: 0.286 V[p-p] (75 Ω)
Others
HDMI 1/2 Input
TYPE A Connectors
! This TV supports “HDAVI Control 3”
function.
function.
PC Input
HIGH-DENSITY D-SUB 15 PIN
R, G, B / 0.7 V[p-p] (75
Ω)
HD, VD / TTL LEVEL 2.0-5.0 V[rms] (high
impedance)
impedance)
Card Slot
SD CARD slot × 1
Monitor
AUDIO L-R
RCA PIN Type × 2
0.5 V[rms] (high impedance)
Output
VIDEO
RCA PIN Type × 1
1.0 V[p-p] (75
Ω )
Dimensions (W × H × D)
933 mm × 650 mm × 295 mm (With TV Stand)
933 mm × 608 mm × 105 mm (TV only)
Mass
22.5 kg Net (With TV Stand)
19.0 kg Net (TV only)
Design and specifications are subject to change without notice. Mass and dimensions shown are approximate.
2
TX-R37LX86K
1
Safety Precautions
4
1.1.
General Guidelines
4
1.2.
Touch-Current Check
4
2
Prevention of Electro Static Discharge (ESD) to
Electrostatically Sensitive (ES) Devices
5
3
About Lead Free Solder (PbF)
6
4
Self Check Function
7
4.1.
Self Check
7
4.2.
Power LED Blinking Timing Chart
7
5
Chassis Board
9
5.1.
Chassis Installation
9
6
Location of Lead Wiring
10
6.1.
Wire Dressing
10
6.2.
Wire Dressing and Connections
12
7
Disassembly for Service
13
7.1.
AC Code dressing for 2-Pin
13
7.2.
AC Code dressing for 3-Pin
13
7.3.
Chassis Rail Installation
14
7.4.
VESA Bracket Installation
15
7.5.
Pedestal Assembly Preparation
16
7.6.
LED Panel Installation
19
7.7.
LCD Panel Assembly Installation
20
7.8.
EMI Installation
21
7.9.
Control Panel Installation
23
7.10. Back Cover Installation
24
8
Adjustment
25
8.1.
Voltage Chart of A Board
25
8.2.
Voltage Chart of P board
25
8.3.
DVCO Adjustment
25
9
Conductor Views
26
9.1.
A-Board
26
9.2.
A-Board
27
10 Schematic Diagram
28
10.1. Schematic Diagram Notes
28
10.2. A Board
29
10.3. K Board
80
10.4. P Board
81
10.5. S Board
88
10.6. V Board
89
11 Parts Location & Mechanical Replacement Parts List
93
11.1. Parts Location
93
12 Packing Exploded View
94
13 Replacement Parts List
95
13.1. Electrical Replacement Parts List
96
CONTENTS
Page
Page
3
TX-R37LX86K
1 Safety Precautions
1.1. General Guidelines
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 leakage current checks to prevent the customer from being exposed to shock hazards.
1.2. 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 Figure 1.
3. Use the 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. The potential at any point (touch current) expressed as voltage U
1
and U
2
, do not exceed the following values:
For AC: U
1
= 35 V (peak) and U
2
= 0.35 V (peak);
For DC: U
1
= 1.0 V,
NOTE :
The limit value of U
2
= 0.35 V (peak) for AC and U
1
= 1.0 V for DC correspond to the values 0.7 mA (peak) AC and 2.0 mA DC.
The limit value U
1
= 35 V (peak) for AC correspond to the value 70 mA (peak) AC for frequencies greater than 100 kHz.
6. Should a measurement be 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.
4
TX-R37LX86K