Panasonic TH-65BFE1W User manual

Model No.
WARNING
This service information is designed for experienced repair technicians only and is not designed for use by the general public.
It dose not contain warnings or cautions to advise non-technical individuals of potential dangers in attempting to service a product.
vice or repair the product or products dealt with in this service information by anyone else could result in serious injury or death.
There are special components used in this equipment which are important for safety. These parts are marked by 7 in the schematic
diagram, circuit board diagrams, exploded views and replacement parts list. It is essential that these critical parts should be replaced
with manufacturer’s specified parts to prevent shock, fire, or other hazards. Do not modify the original design without permission of
manufacturer.
IMPORTANT SAFETY NOTICE
For replacemant parts and exploded view, refer to the separated manual "PARTS LIST".

PREFACE <65BFE1W>
CONTENTS
1. Safety Precautions
2. Warning
3. Specifications
SECTION 1 SERVICE INFORMATION
1. Name of each part
2. Notes on Service
3. Service Mode
4. Troubleshooting Guide
SECTION 2 DISASSEMBLY PROCEDURES
1. Parts Locations
SECTION 3 ADJUSTMENTS
1. Software Update Procedures
SECTION 4 DIAGRAMS
1. Block Diagrams

PREFACE <65BFE1W>
TH-50LFC70U/TH-50LFC70W
1.1. General Guidelines
1. When conducting repairs and servicing, do not attempt to modify the equipment, its parts or its materials.
2. When wiring units (with cables, flexible cables or lead wires) are supplied as repair parts and only one wire or some of the
wires have been broken or disconnected, do not attempt to repair or re-wire the units. Replace the entire wiring unit instead.
3. When conducting repairs and servicing, do not twist the Fasten connectors but plug them straight in or unplug them straight
out.
4. When servicing, observe the original lead dress. If a short circuit is found, replace all parts have been overheated or damaged
by the short circuit.
5. After servicing, see to it that all the protective devices such as insulation barriers, insulation papers shields are properly
installed.
6. After servicing, make the following leakage current checks to prevent the customer from being exposed to shock hazards.
1.2. Touch-Current Check (for TH-50LFC70U)
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 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) shall not exceed 0.5 MIU.
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.

PREFACE <65BFE1W>
1.3. Touch-Current Check (for TH-50LFC70W)
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 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 U
1 and U 2, does not exceed the following values:
For a. c.: U 1 = 35 V (peak) and U 2 = 0.35 V (peak);
For d. c.: U 1 = 1.0 V,
Note:
The limit value of U 2 = 0.35 V (peak) for a. c. and U 1 = 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 U 1 = 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.
Figure 1

PREFACE <65BFE1W>
TH-50LFC70U/TH-50LFC70W
2.1. Prevention of Electrostatic Discharge (ESD) to Electrostatically Sensi-
tive (ES) Devices
Some semiconductor (solid state) devices can be damaged easily by static electricity. Such components commonly are called Elec-
trostatically Sensitive (ES) Devices. Examples of typical ES devices are integrated circuits and some field-effect transistors and
semiconductor “chip” components. The following techniques should be used to help reduce the incidence of component damage
caused by electrostatic discharge (ESD).
1. Immediately before handling any semiconductor component or semiconductor-equipped assembly, drain off any ESD on your
body by touching a known earth ground. Alternatively, obtain and wear a commercially available discharging ESD wrist strap,
which should be removed for potential shock reasons prior to applying power to the unit under test.
2. After removing an electrical assembly equipped with ES devices, place the assembly on a conductive surface such as alumi-
num foil, to prevent electrostatic charge buildup or exposure of the assembly.
3. Use only a grounded-tip soldering iron to solder or unsolder ES devices.
4. Use only an anti-static solder removal device. Some solder removal devices not classified as “anti-static (ESD protected)” can
generate electrical charge sufficient to damage ES devices.
5. Do not use freon-propelled chemicals. These can generate electrical charges sufficient to damage ES devices.
6. Do not remove a replacement ES device from its protective package until immediately before you are ready to install it. (Most
replacement ES devices are packaged with leads electrically shorted together by conductive foam, aluminum foil or compara-
ble conductive material).
7. Immediately before removing the protective material from the leads of a replacement ES device, touch the protective material
to the chassis or circuit assembly into which the device will be installed.
Caution
Be sure no power is applied to the chassis or circuit, and observe all other safety precautions.
8. Minimize bodily motions when handling unpackaged replacement ES devices. (Otherwise ham less motion such as the brush-
ing together of your clothes fabric or the lifting of your foot from a carpeted floor can generate static electricity (ESD) sufficient
to damage an ES device).
(ES) Devices

<65BFE1W>TH-50LFC70U/TH-50LFC70W
2.2. About lead free solder (PbF)
Note: Lead is listed as (Pb) in the periodic table of elements.
In the information below, Pb will refer to Lead solder, and PbF will refer to Lead Free Solder.
The Lead Free Solder used in our manufacturing process and discussed below is (Sn+Ag+Cu).
That is Tin (Sn), Silver (Ag) and Copper (Cu) although other types are available.
This model uses Pb Free solder in it’s manufacture due to environmental conservation issues. For service and repair work, we’d
suggest the use of Pb free solder as well, although Pb solder may be used.
Caution
• Pb free solder has a higher melting point than standard solder. Typically the melting point is 50 ~ 70 °F (30~40 °C) higher. Please
use a high temperature soldering iron and set it to 700 ± 20 °F (370 ± 10 °C).
• Pb free solder will tend to splash when heated too high (about 1100 °F or 600 °C).
If you must use Pb solder, please completely remove all of the Pb free solder on the pins or solder area before applying Pb sol-
der. If this is not practical, be sure to heat the Pb free solder until it melts, before applying Pb solder.
• After applying PbF solder to double layered boards, please check the component side for excess solder which may flow onto the
opposite side. (see figure below)
Suggested Pb free solder
There are several kinds of Pb free solder available for purchase. This product uses Sn+Ag+Cu (tin, silver, copper) solder. How-
ever, Sn+Cu (tin, copper), Sn+Zn+Bi (tin, zinc, bismuth) solder can also be used.

PREFACE <65BFE1W>

PREFACE <65BFE1W>

1. Name of each part . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . INF-2
1.1. Display body
1.2. Connecting terminals
1.3. Remote controls
2. Notes on Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . INF-8
2.1. Before service operation
2.2. Service
3. Service Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . INF-6
3.1. How to display Service mode
3.2. Service mode -Display Information
3.3. Service mode - Self Diagnosis
3.4. Service mode - Others
4. Troubleshooting Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . INF-12
4.1. Power LED Indication
4.2. Troubleshooting flow

SECTION 1 SERVICE INFORMATION <65BFE1W>
1.1. Display body
Some of the pages on this section are excerpted from the owner's
manual, thus the reference page numbers on pages indicate those for
owner's manual .

SECTION 1 SERVICE INFORMATION <65BFE1W>

SECTION 1 SERVICE INFORMATION <65BFE1W>
1.2. Connecting terminals

SECTION 1 SERVICE INFORMATION <65BFE1W>
1.3. Remote controls

SECTION 1 SERVICE INFORMATION <65BFE1W>

SECTION 1 SERVICE INFORMATION <65BFE1W>

SECTION 1 SERVICE INFORMATION <65BFE1W>
2.1. Before service operation
2.1.1. LCD panel module
1. Although an LCD panel module is a product of high-precision technology, some of the pixels on the image may be missing
or constantly lit. Please note that this is not a failure.
2. Displaying a still image for a longer time may result in an after-image on the LCD panels. If this happens, display the all
white screen in the test pattern for an hour or more.
2.2. Service
2.2.1. Supporting Methods
The basic service policy is shown below.
Repair contents Applied parts
Block replacement
Module replacement
- LCD panel module
- PCB module
Replaced by discrete components Other electrical parts and mechanism parts
2.2.2. Repair
1. Before repairing, make sure to turn off the main power and disconnect the power plug from the power outlet.
* When replacing the PCB module, the internal electrical parts can be broken by the static electricity of clothes or human
body. Please take care in static electricity, use an antistatic wrist strap or wear the anti-static electricity gloves.
2. After repairing, please check the gradation (10 step or the gray scale) test pattern or moving image.
Also, please check that it is normal on a self check screen.

SECTION 1 SERVICE INFORMATION <65BFE1W>
3.1. How to display Service mode
n To display the Service mode
1. Press the [MENU] button on the remote controller.
The MAIN menu appears on the screen.
2. Press the [t u] buttons in the following order.
(Please use the remote controller which accessory of TH-65BFE1 or TH-75BQE1.)
Pressing order:
[t] → [t] →[u] →[u] →[t] → [u]→[t] → [u]→[OK]
n To exit the Service mode
Press the [MENU] button to return Main menu.
[ Caution ]
If you execute the "Aging mode" while the 65BFE1 is key lock mode, you can not cancel aging mode.
Please unlock "Key lock mode" or Update firmware to "Ver. 1.05.01" or later".
●Service menu

SECTION 1 SERVICE INFORMATION <65BFE1W>
3.2. Service mode - Display Information
Display Information
Item Select Function Remarks
Model Name - Show the model name
SW Version - Show the Software version
Manufacture time - Data/Time of build Softwae
Panel Information - Panel name (Factory use only)
Serial number - Serial number
3.3. Service mode - Self Diagnosis
Self Diagnosis
Item Select Function Remarks
Volltage
5 V Detect - Show the voltage of the 5V detected
function.
12V Detect - Show the voltage of the 12V detected
function.
Internal Temperature Show the internal temperature
Operation Time
Total Working Time - Show the total working time in hour. This item can be reset by
factory reset in service menu
only.
Cumulative Total Working Time - Show the cumulative total working time
in Minute.
Save data for each 10 minutes.
(Ex.) 1085Min = 10850 minutes
This item can not be reset by
ant reset.

SECTION 1 SERVICE INFORMATION <65BFE1W>
3.4. Service mode - Others
[ Caution ]
If you execute the "Aging mode" while the 65BFE1 is key lock mode, you can not cancel aging mode.
Please unlock "Key lock mode" or Update firmware to "Ver. 1.05.01" or later".
Others
Item Select Function Remarks
Test Pattern Off/White//Red/
Green/Blue/Black
Show the color pattern by PID internal. Auto disable this after power
off.
Aging Mode - Factory use only If you execute the "Aging
mode" while the 65BFE1 is
key lock mode, you might
not be cancel aging mode.
Display format NS8/NS10/Jeida8/
Jeida10
Factory use only Only TH-65BFE1
Mirror control Rotate Normal
Rotate H Only
Rotate V Only
Rotate HV
Factory use only
# Do not change to other than "Rotate
Normal".
Only TH-65BFE1
All User Reset - When this item is executed, all user data
are reset.
· "User menu" setting
· "Power on mode"
= "Final memory (default)"
· "Power saving mode" = "OFF"
# Following items are not reset.
"ADC setting" value, "Color Temperature"
setting, "HDCP key", "Status", "Market
Selection" setting, "Serial number",
"Total Working Time", "Cumulative Total
Working Time".
Factory Reset - When this item is executed, "Total
working time" is reset in addition to "All
user setting reset" item.
Market Select 0/3 Select the model setting.
0: TH-65BFE1J
3: TH-65BFE1W
After changing "Martket
Select", execute "All user
reset" and reset the "user
menu" etc.

SECTION 1 SERVICE INFORMATION <65BFE1W>
4.1. Power LED Indication
In the power LED, you can view the status of the Flat Panel.
Condition LED (Red) LED (Green) Remark
Power On OFF ON
Power Off ON OFF
Power Off when Schedule
function is enable ON ON
Software update when AC On Blink OFF
Over safe temperature Blink OFF
Over alam temperature Blink OFF