lifi lcd projection tv service training...

Model PT-xxLCX70National Training

LIFI LCD Projection TV Service Training Guide

Contents:

Service Policy

Board Access

No Start Up

Shutdown

Service Mode

Adjustments

Useful Part NumbersPwr Pwr lampButton LED LED

“LIFI” series LIFI = LIght FIdelity

Model PT-56LCX70 shown

2007 inception

year

1080p720pPT-50LCX7PT-56LCX7, 70PT-56LCX7, 70

PT-50LCZ7, 70PT-56LCZ7, 70PT-56LCZ7, 70

Slide # 2 Model PT-xxLCX70National Training

Contents

New Lamp Technology 3Flexible Repair Policy 4

Access• Chassis Removal 6• Assemblies (groups A-D) 7• Lamp Assembly Removal (group A) 8• Rear Board Removal (group B) 13• Power Supply & Tuner Bds. (C) 14• Main Bd & Light Engine (D) 15

Layout of used & unused Connectors• Rear View 17• Top View 18

No TV Start Up• Normal Power On Sequence 20• Dead Set 22• Power LED blinks continuously 23

TV Shuts Down• Error Code Summary 25• Orange 1X, 3X, 4X (voltage loss) 26• Orange 2X (DT+9V loss / therm fuse) 27

TV Shuts Down (con’t)• Orange 6X (Audio out) 28• Orange 7X, 9X (Communications loss) 29• Orange 10X (+17Vdc loss) 30• Lamp Mis-Operation (troubleshooting clues) 32• Red 2X, 3X, or 13X ( no lamp) 33• Quick Lamp Checks & return info 34• Red 4X (high temp) 37• Red 5X (no lamp communications) 39• Red 8X, 9X, 10X, 11X (no fan) 40• Red 12X (no rear board connection) 41

Service Mode• 3 S/M What can they do for me? 43• Entry & Navigation - S/M 1 (TV Reset) 44• Entry & Navigation - S/M 2 (pattern,code) 45• Entry & Navigation - S/M 3 (D Chan SNR)47

Adjustments after Light Engine Replacement• Picture Straighten 49• Mechanical Focus 51Video Process; Audio Process 53Useful Part numbers 55

Panasonic PT-xxLCX70 LIFI series LCD PTV Repair


LIFI New Lamp Technology• Fast starting (less than 10 sec)

• Higher frequency so there is no lamp “hum”

• Lower RF noise level compared to Mercury Vapor lamps

• High temperature so it must be heat sinked and forced cooled.

• No flicker like mercury vapor lamps at the beginning and end of life

• Long life span Lamp. Warranty is 5 years (original lamp, consumer use).

• Lamp assembly needs: 26Vdc power, and Lamp-On signal (5V) to start (light).

• Microprocessor in the lamp assembly heats for pre-start & sweeps RF frequency for ignition

• Lamp assembly micro communicates with the TV micro (no communications – no shutdown, just audio)

LIFI lamp assembly is underneath

Remove the top power supply with fans.

Lamp assembly looks like a big heat sink.

Comes with small top lamp fan

Top lamp fan

back

front


Chassis (OPT/TV unit) Lamp unit

Flexible Service Policy – blocks or boards

Power Bd.Rear Jack Bd.

RF amp Power Bd.

Lamp unit

Main Bd.

1.

2.Tuner Bd.

blocks

boards

OR


Flexible Service Policy – boards

Parts Available:

1. Front & Rear Fans

2. Lamp Power Supply

3. Lamp Assembly with Lamp Fan

4. Main Board with Light Engine & Optics fan

5. Rear (Jack) Board

6. Power Supply Board

7. Tuner board

Not Shown (front panel location):8. Front Jack Bd.9. SD / HDMI board10. Power Button Bd. W IR receiver

Chassis Rear

Main bd.

Accessibility Ease:a) Tuner Bd.b) Lamp Pwr Bd.c) Rear Panel Bd.d) Lamp Assemblye) TV Pwr Supply Bdf) Main Bd w optics

Easiest to

remove

hardest


Chassis PullChassis Removal1. Remove the Back cover (shown removed)2. The support shields are sharp. Pull the right support shield (top) toward you to

remove. Set aside the support shield. 3. Remove 2 top screws, 2 bottom screws (401& 478). 4. Unplug 5 cables shown (CN4501, CN8201, CN3502, & CN6003).5. Slide out the entire Chassis.

Chassis InstallationThe chassis will NOT go all the way in (last ½”) if the chassis is not in the channels shown.

2


Access (groups A - D)

Power Supply / Tuner Bd group C

Rear Board group B

Lamp Group A

Light Engine Removal (group D):1. Remove the Rear Board2. Remove the PS & Tuner bds.3. Slide the L Engine away from

the Lamp Block.

• Lamp PS (top)• Lamp Assembly w

small rear fan

Boards are accessed in 3 groups shown below. Light Engine pull requires groups 2 & 3 to be removed first.


Access – lamp group A

Lamp Group A removal overview:1. Unplug 5 cables (not shown).2. Remove the 8 screws that hold the fan

frame + top lamp power supply (shown in the next detail pages) & lift out.

3. Remove 6 bottom screws and lift the lamp assembly out.

4. Remove the side & bottom shields from the lamp. The lamp is the heat sink assembly.

Lamp Group A

Lamp assembly part

Right shield


1) Remove 8 screws.

2) Then, Remove the Fan Frame with the Fans and RF amp Power PCB together.

the Fan Frame

Lamp Removal Details 1/3


Lamp ass’y

3) Remove 6 screws. Then, slide out the Lamp ass’y.



Lamp unit

Lamp unit


4) Then, remove the 4 Plates from Lamp ass’y.(11 screws)

Lamp Assembly


Access (groups A - D)

Power Supply / Tuner Bd group C

Rear Board group B

Lamp Group A

Light Engine Removal (group D):1. Remove the Rear Board2. Remove the PS & Tuner bds.3. Slide the L Engine away from

the Lamp Block.

• Lamp PS (top)• Lamp Assembly w

small rear fan

Boards are accessed in 3 groups (A-C) shown below. Light Engine pull requires groups B & C to be removed first.


Access – Rear Board group B

Rear Board removal:

1. Lift off the black rear jack panel, after removing the 6 screws (452 are machine & 402 are self tapping).

2. Remove 5 screws around the perimeter of the rear board.

3. Remove 4 connectors shown below.

4. Pull the board down to unplug (from CN3501.

Rear Board group B


Access –Tuner & Power Bds. group C

Tuner & Power Bd. removal:

1. Remove 3 screws on the tuner bd & lift off.

2. Remove 4 screws from around the power supply board. A right angle or stubby screwdriver will be handy.

3. The 5th power supply board screw can be accessed after you remove the rear jack board.

4. Alternate procedure – If you are unable to remove the 5 screws because of the angle, slide out the entire PS assembly after removing a front and a top chassis screw, as shown below.

PS Bd. 4rd screw

PS Bd 5th screw

4. PS front ch screw

4. PS top ch screw

Tuner Bd & Power Supply

group C


Access – Main Bd. & Light Engine group D

Main Bd. & Light Engine removal (overview):

1. Remove 3 screws on the tuner bd & lift off.

2. Remove the rear jack board (11 screws).

3. At the top remove the main board (7 screws)

4. At the base, remove the screws that hold the black optical unit. The Main board and Optical unit are replaced together (matched). If they are replaced separately WB, brightness, position data in the S/M must be adjusted.

The Main Bd & Light Eng are removed after removing the Rear board (group B) and the Tuner board (group C).

Tuner Bd (group C)

Rear Board

(group B)

Main Bd & L Eng(group D)

5. Refer to the service manual for optics removal details.


Contents











Layout – Rear View


Layout – Top View


Contents










Model PT-xxLCX70National Training

Power On Sequence

Power On SequencePress Power ButtonBoth Relays clickRear Optical Output LED turns on (red)Power LED blinks green1 Fan comes on3 more fans come on (0.3 Amps AC)TV Micro Communications (Data) to the lamp Lamp-On command (+ 5V) to the lampLamp turns on (2.3 AC amps)Lamp Light is detected and Data is sent from the Lamp micro to the TV micro as proofTV micro unmutes the Video & Audio (at lamp light detection)Power LED changes from blinking to solid green

Plug In

No TV relays or response at plug-in0111126789

10

10

Sec

Power Off SequencePress Power Button (2.3A ac)Micro mutes audio and videoGrn Power LED changes to blinking redLamp turns Off (0.3Amps AC)All 4 Fans turn off Relays click Off (lamp fans now off)

01 1123131

Sec

Panasonic PT-xxLCX7/70, LCZ7/70 LIFI series


Contents











Dead Set (No Start Up)Symptom: Dead set. No Relays click. No Fans. No error codes.

Cause: There is no standby voltage getting to the microprocessor.

Troubleshooting: 1. Check the thermal fuse on the lamp assembly for 0 ohms. 2. Replace the power supply board if there is no Standby 7Vdc at CN1101/pin 5 (main board).3. Replace the main board if the standby voltage is present.

Suspect: Pwr Bd, Main Bd (light eng).


Pwr LED blinks green continuously (No Start Up)

Symptom: Relays click. Fans rotate. No Audio. Dark screen. Power LED continuously blinks green.

Cause: There is no AC (stop) detection voltage getting to Micro IC6004. Also see Orange blinks 9X.

Troubleshooting: Unplug CN1101 from the main board. Keep the TV off but plugged into AC. If the plug’s (not the connector) CN1101/pin 6 measures 1.5Vdc or less, replace the power supply board. If the voltage is higher than 2Vdc (normal), replace the main board w optics.

Suspect: Pwr Bd, Main Bd (light eng), thermal fuse.


Contents











Error Code SummaryIndication Cause Problem areas Stored code

Org Pwr 1X, 3X, 4X Excessive / Voltage loss Main PS or Main board. Pwr 01, 03, or 04.

Org Pwr 2X DTV +9V loss, thermal fuse

Thermal fuse, Power supply, Rear Bd. Or the Main bd.

Pwr 02

Org Pwr 6X Audio Output Main bd or unstable PS +18Vdc (CN1101/pin 1)

Pwr 06

Org Pwr 7X, 9X Communications loss Main board or power supply Pwr 07, 09

Org Pwr 10X +17Vdc Loss Main board or power supply Pwr 0A

Red Lamp 2X, 3X, 13X No lamp Main PS, Lamp PS, Lamp, Main Bd

Lamp 02, 03, or 0D

Red Lamp 4X Lamp Temp Blocked ventilation, Lamp, Main board.

Lamp 04

Red Lamp 5X No lamp communication Main PS, Lamp PS, Main Bd. Lamp 05

Red Lamp 8X 9X, 10X, or 11X

No fan detected Lamp (8X), Opt (9X), Front fan (10X), or rear (11X)

Lamp 08, 09, 0A, or 0B

Red Lamp 12X Rear Jack Board N/C Rear Bd – Main Bd CN3501/pin 29 is not making good contact.

0C

Reset the blinking error codes at shutdown by unplugging the TV from AC.


Orange LED blinks 1X, 3X, 4X (voltage loss)

Symptom: Relays click. Fans come on briefly. Shutdown. Relays click off. Pwr LED blinks orange.Cause: Low or excessive supply voltage from the Main board or TV Power supply board or def lamp assembly.

Troubleshooting: 1. Measure the voltage at CN1101/pin 10 at power on. a) Low? Replace the power supply board. b) High? Replace both the power supply and Main boards (possible damage to the main bd.) c) Normal? Replace the Main board.

Suspect: TV Pwr Bd, Main Bd (light eng), or the lamp block,.

CN6005

3Lamp BlockSub 5V

11

10

CN1101

9V


Orange LED blinks 2X (DT +9V loss)Symptom: Relays may click. No Fans rotate. Cause: 1) Open Thermal fuse. 2) Loss of DT+9V from the power supply,

3) The entire main power supply is not working.

Troubleshooting: 1. Check the thermal fuse on the lamp assembly for 0 ohms. 2. Replace just the main board if DT9V is present at CN1101/pin 10. 3. Replace both the PS & Main bd. if there is voltage at CN1101/pin 1 and not at pin 10.

Suspect: TV Pwr Supply Bd, Main Bd (w optics), or thermal fuse.


Orange LED blinks 6X (audio output)

Symptom: Relays may click when the power button is pressed. Fans come on before shutdown.

Cause: Defective audio output IC on the main board or excessive supply voltage.

Troubleshooting: 1. Monitor the DC voltage at CN1101pin 1. a) Normal? Replace the Main board with optics. b) Voltage is high? Replace the power supply board. c) Unstable? Monitor CN1101/pin 10 voltage. If this voltage is also unstable, replace the power supply board. If stable, replace the main board – light engine that is loading down the 18V power supply line.

Suspect: Pwr Supply Bd, or Main Bd + light engine.


Orange LED blinks 7X or 9X (No Communications)Symptom: Power LED blinks Green for 3 mins. Fans rotate. No A/V. No lamp.

Unit finally shuts down and shows error code = Orange LED blinks 7 or 9 times. Cause: 1) Communications loss from an I2C ICs including the lamp assembly micro (via CN6005/p7) or

2) No Lamp-On signal (CN6005/pin 2) causes no CN6005/pin 7 reply communications.

Suspect: Main Bd. + Light Engine, or the Lamp assembly.Troubleshooting:Unplug the main board connector CN6005 (to the lamp assembly) and power on the TV. a) If the unit still blinks 7X or 9X, replace the Main board with optics. b) If the other (lamp) LED blinks Red 5X, (no lamp communications), replace the Lamp Assembly (the

main board is responding correctly to no CN6005).

CN6005 2 Lamp-On = 5V to lamp assembly7

Reply data from lamp assembly


Orange LED blinks 10X (+17V loss)

Symptom: Power LED begins to blink green then changes to 10 blinks orange. No A/V.No lamp. No Fans. Cause: +17Vdc from the power supply is missing.

Suspect: Power supply board or the Main board - Light Engine

Troubleshooting: Measure the voltage at CN1101/pin 9 at power on.a) Present? Replace the Main board with optics.b) Missing? Unplug the TV and CN1101. Check for a short from the main board connector CN1101/pin 9 to cold ground. Normally the resistance at CN1101/pin 9 is more than 2K ohms on the 2K ohm DVM range (actually 56k ohms). If the resistance is lower than 2k ohms, replace the light engine and power supply board. If the resistance is higher than 2k, replace the power supply board.


Contents











Lamp Mis-operation (troubleshooting clues)1. Normally at power on, 3 signals appear at the lamp: a) +26Vdc, b) Lamp-On +5V (CN6005/2), and c)

Communications (data). Then within 10 seconds the lamp lights. [Sub 5 is unnecessary]

2. The lamp assembly only needs + 5Vdc (lamp-On) and + 26Vdc (power supply) to light.

3. Communications is not necessary to keep the + 5Vdc Lamp-On signal high (lamp lit).4. The Lamp-On signal will remain high or cycle high and low before shutdown, depending upon communications presence:

a) Defect Scenario 1 – NO lamp light - If no lamp light is detected inside the lamp assembly, data communications returned to the TV micro causes the Lamp-On output signal (CN6005/2) to repeatedly go low and high (3X). If still no lamp ignition is detected, the TV shuts down with an error code (red 2X – no lamp light).

b) Defect Scenario 2 - If NO communications is returned to the micro (from the lamp), the micro continues the Lamp- On signal (CN6005/2 = 5V) and the TV remains on with sound and picture. [Unplugging CN6005 produces error code = Red 5X – no lamp communications.]

c) Defect Scenario 3 - If NO communications enters the lamp assembly, the lamp outputs no communications. [If you do not see data into the lamp, expect no data output.] (error code = Red 5X – no lamp communications).

22 sec

22 sec 28 sec

22 sec

Lamp ON

Lamp Off / TV Off

28 sec

Lamp OffLamp-On signal

5V

0VLamp on

Lamp start

Normal Lamp operation / or no communications

No Lamp Light operation w data communications

(CN6005/pin 2)


Red LED blinks 2X, 3X, or 13X (no lamp)Symptom: TV shuts down with an error code. 2X = No light detected; 3X = Defective internal lamp assembly Temp sensor; 13X = Input +26Vdc Low (at CN151 red).Cause: Missing 26Vdc; missing CN6005/pin 2 voltage (comm); or internal lamp assembly defect (no light).

Suspect: Power supply board, Main Bd. (+ Light Engine), Lamp Pwr Supply, & Lamp Assembly.Troubleshooting:1. Replace the Lamp’s “RF Amp” Power Supply if there is no +26Vdc out at CN151 but there is 120Vac

input at CN1 at power on. You may want to disconnect the lamp load by unplugging CN151 & rechecking for +26V.2. Press pwr on. Replace the lamp assembly if these 2 voltages are both present at power on: a) +26Vdc at

CN151, red wire b) +5Vdc at CN6005/pin 2, or c) if the TV draws approx 2.1 amps @ 120Vac but no light. [2.1A ac means +26V & +5V are OK] You can also use a lamp test method described in slide 34.

3. If 5V at CN6005/pin 2 is missing at power on, replace the main board.


Quick Lamp ChecksCheck Method 1 (need AC ammeter)

Lamp fan

Check Method 3 (need wire)1. Turn the TV on. 2. Check for +26Vdc at CN151/red wire to chassis gnd.3. Check for 5Vdc at CN6005/pin 3 (Sub +5Vdc @ pwr on).4. Connect CN6005 / pins 2 (lamp-on) and pin 3 together (use a wire

strand or resistor lead as a jumper)

5. Replace the lamp if it does not turn on within 5 seconds.

21 (red wire = pin 1)

7

3CN6005

Short pins 2 & 3 together with a wire strand. Plug it back into CN6005 and turn on the TV for the lamp to come on.

Check Method 2 (need 100k 1/4W)

1. Turn the TV off. 2. Unplug CN6005.3. Connect a 100k ohm 1/4W resistor between the CN6005

plug, pin 2 and CN151/any red wire (as shown in the picture below).

4. Press the TV’s power on button. 5. Check for +26Vdc (lamp power) at CN151/red wire to

chassis gnd. [No 26V? Unplug lamp (CN151) & check again.]

6. Replace the lamp if it does not light 5 seconds after the TV power relay clicks on and the +26Vdc is present.

Take the back panel off the TV to access the 2 connectors, then use methods 1, 2, or 3 to check the lamp.

100k 1/4w

Plug from CN6005/Pin 2

CN6005 Red wire = pin 1

CN151

100k +26Vdc at CN151Lamp assembly CN6005/pin 2 plug. 2Vdc

Main Bd.

Lamp PS

CN151

If the TV draws 2.1-2.4 AC amps at power on, yet the lamp does not light, replace the lamp assembly. {The lamp assembly is instructed to turn on because it draws the correct current, but fails to ignite.)

TVAC

Clamp on ammeter


Lamp GlowUsing method 2

CN6005 socket

CN6005 plug


Lamp Return Info

After you prove the lamp is bad, replace the lamp and use

Service bulletin # SH-B19-07-01

Requesting general information to be attached with the old lamp assembly.

In black paint on the lamp assembly


Red LED blinks 4X (Lamp temp 1/2)Symptom: TV shuts down when it gets very hot. Red Lamp LED blinks 4XCause: Lamp assembly sensors detect that the assembly / TV is too hot.

Suspect: Light Engine (main board), or the Lamp Assembly, or blocked ventilation.Troubleshooting:1. Press pwr on. If +26Vdc is high at CN151 (red wires), replace the lamp (RF Amp) power supply. 2. Measure the temperature of the lamp assembly heat sink (at the thermal fuse – see layout diagram).

a) Heat sink temp is about 132 degrees F or less (normal) before shutdown? Remove wire CN6005/pin 7 from the plug and plug CN6005 back into the connector. Turn on the TV. Repeat.

• If the TV shuts down at the same time and blinks 4X, replace the Main board with the light engine. • If the TV remains on while blinking 5X, replace the Lamp unit.

b) Heat Sink temp high? Fans slow? Check for 8Vdc fan run voltage at the 4 rear board fan connectors, pin 3.

Rear Bd.

Fan conn Layout

See “Layout” for the thermal fuse location.


Red LED blinks 4X (lamp temp 2/2)

3. If the lamp assembly temperature rises to shutdown level because the TV is enclosed, check for the owner’s manual’s cautions.

4. If there are prior glass fragments under the lamp assembly (heat sink), also check for enclosure restriction & ventilation.

Symptom: TV shuts down when it gets very hot. Red Lamp LED blinks 4XCause: Lamp assembly sensors detect that the assembly / TV is too hot.

Suspect: Light Engine (main board), or the Lamp Assembly, or blocked ventilation.Troubleshooting:1. Press pwr on. If +26Vdc is high at CN151 (red wires), replace the lamp (RF Amp) power supply. 2. Measure the temperature of the lamp assembly heat sink (at the thermal fuse – see layout diagram).

a) Heat sink temp is about 132 degrees F or less (normal) before shutdown? Remove wire CN6005/pin 7 from the plug and plug CN6005 back into the connector. Turn on the TV. Repeat.

• If the TV shuts down at the same time and blinks 4X, replace the Main board with the light engine. • If the TV remains on while blinking 5X, replace the Lamp unit.

b) Heat Sink temp high? Fans slow? Check for 8Vdc fan run voltage at the 4 rear board fan connectors, pin 3.


Red LED blinks, 5X (no lamp communications)Symptom: Fans turn. Audio OK. Picture may be normal brightness or the screen is Dark (No lamp lit). Cause: 1) No communications between the TV micro and the Lamp block micro, or 2) +26Vdc is missing from CN151, or 3) Lamp assembly is bad (communications defect).

Suspect: Power supply board, Main Bd. + Light Engine, Lamp Block, or RFamp Pwr Supply.Troubleshooting:1. Replace the lamp power supply (RF Amp Pwr Supply) of + 26Vdc is not present at CN151/red wire

and 120Vac is input the board at CN1. 2. If data is present at CN6005/pin 7, replace the Main board w optics. Use a DVM set to AC scale to

measure the data at power on.3. If the signal at CN6005/pin 1 is present at power on, replace the Lamp Assembly. If there is No

data at CN6005/pin 1, replace the Main board. CN6005/pin 1 data is difficult to see on a DVM.


Red LED blinks 8X, 9X, 10X, or 11X (no fan)Symptom: TV power on but shuts down. Lamp LED blinks 8, 9, 10, or 11 timesCause: A fan rotation has not been detected.

Suspect: One of the 4 fans, Rear Jack Board or the Light Engine (with Main Bd.) Troubleshooting:1. Replace the fan that is not spinning, if there is at least 5Vdc (fan supply voltage) at pin 1 of the dead fan. 2. Measure the voltage at pin 3 of each fan connector (CN2751-4). If one is not 0Vdc, replace that fan even if it is spinning. The Opt Fan (CN2754) is part of the light engine. 3. If all pin 3’s are 0Vdc (normal), change the Main board if CN3501/pin 29 is 2.8Vdc or higher. If lower than 2.8Vdc replace the Rear board.

10X

11X

9X

8X

8X = CN27539X = CN2754

10X = CN275111X = CN275229

CN3500 / CN3501

2.8Vdc

+3.3V

R


Red LED blinks 12X (no board connection)Symptom: TV power on but shuts down. Lamp LED blinks 8, 9, 10, or 11 timesCause: A fan rotation has not been detected.

Suspect: Main Bd. And Rear Bd. Connectors are not connected or one is bad.Troubleshooting:1. If CN3501 looks connected to the main board, measure the voltage at pin 29. Replace the rear board only if the voltage is 3.3Vdc. Replace the main board if the voltage is 2.8Vdc (normal) or 0Vdc. Before replacing a board, check the connectors (CN3500 & CN3501) on both boards for bent pins.

10X

11X

9X

8X

8X = CN27539X = CN2754

10X = CN275111X = CN2752

+3.3V

R29

CN3500 / CN3501

2.8Vdc


Contents











3 Service Modes – What can they do for me?

1. Self Check S/M • Error Codes• Communication• Resets TV

Functions:- Lists all errors that have occurred since reset- Initial I2C communications between micro to ICs.- Resets to “Out of Box” TV customer settings.

Functions:- Contrast level adjustment & Max bright number- Manual White Balance Adjustments- Lamp time (not adjustable)

- Remote Control Channel set- SOS history (in PTCT row), TV hours. (press 2 then press MUTE to view)

- Video Patterns press 2 to enter 4 to return.Shown in slide 36

Functions:- TV Digital Channel Strength (SNR) & Freq.

2. Main Service Mode• Adjust• WB – Adj• Option• RM-Set• SRV –Tool• MMD – CHK

3. Diagnostic Screen

3 S

ervi

ce M

odes


Service Mode 1 – Entry & Navigation

1b. Self Check Service Mode with TV Reset at exitEntry – Turn the TV ON. With no OSD, Hold the front panel VOL Dwn and the

remote’s MENU button for 5 seconds.Exit – Unplug the TV power from AC exits and the error codes clear / erase.

1a. Self Check Service ModeEntry – Turn the TV ON. With no OSD, Hold the front panel VOL Dwn and

the remote’s OK button for 5 seconds.Exit – Unplug the TV power from AC.

Communication

All Error codes since last erasure (clear)

Tuner software #

Hint: Hold the remote in your left hand. The IR sensor is at the TV left.


Service Mode 2 – Entry & Navigation

Latest SOS

Previous SOS

The SOS before previous

The 2nd & 1st SOS after shipment /last self check

PTCT :P04.L0b. L0b.P04.L0b

Power LED blinks 4 times

Lamp LED blinks 11 times

1=fwd

2 =rev

2. Main Service ModeEntry – Turn the TV ON. With no OSD, Hold the front panel VOL Dwn and press the remote’s

RECALL button 3 times. Service Mode 2 appears at the left.Exit – Press the TV power OFF button on the TV or remote.

Navigation - Use the following remote buttons:

1 = Main menu Fwd, 2 = Main menu Rev; 3 = Sub menu Fwd, 4 = Sub menu Rev Vol up / dwn = data change


a) Press remote buttons 1 or 2 to get to SRV - TOOL

main

sub

SOS = Stored Error Codes


Service Mode 2 - Service Patterns

a) Press buttons 1 or 2 to get to MMD - CHK b) Press 3 to change

patterns and 4 to return

c) These Patterns and the TV menu are inserted into the video chain at the main board (see below).

1=fwd

2 =rev

Main Bd Light Eng.

PixRear Bd.

Tuner bd. menu /

TV Video flow

patterns

inputs



Service Mode 3 – Entry & Navigation3. Diagnostic Screen ModeEntry – Turn the TV ON and tune to a digital channel. With the remote in your left hand, hold the Volume UP button. An OSD bar will appear & increase. While the remote Vol up button is pressed, Press the front panel Volume UP button. The bar will stop increasing and vanish if both buttons are recognized. The diagnostic screen appears after 5 seconds. Exit – Press the remote’s EXIT button.

Signal strength

Digital TV Station Info

Display CH # (FCC CH #)



Contents











When the Light Engine / TV block is replaced:1. Straighten the picture (check)2. Adjust mechanical focus (necessary)

After Light Engine Replacement 1/3

1. Straighten the Picturea) In the following steps you will open the service mode to generate the position pattern.

1) Turn the TV ON. With no OSD, place the remote in your left hand. Hold the front panel Volume DWN button and press remote’s RECALL button 3 times quickly for the Main S/M.

2) On the remote, press the #2 button to get into the “MMD-Check” selection. 3) On the remote, press the #3 button to get a position pattern.

LCD

3) Position Pattern1) Main Service Mode 2) MMD-CHK selection

# 2 # 3button

button



LCD

Cover Installation hints:1. Place the front cover in place.2. Push the front cover flat against

the TV and slide up to lock.

b) From the front of the TV, remove the front cover to access the projection lens.

1. Straighten the Picture

1) Remove 2 screws from the back of the set (#401).

2) Remove 1 black screw (#454) from the front of the set.

3) With a ½” blade screwdriver, working from the bottom, pry the left front cover outward and work across to the right.

4) Pull the front cover down and out.

Front Cover p/n =50” TV = LSYF 061156” TV = LSYF 061261” TV = LSYF 0613

Lens compartment

401

3)Pry slot

3)Pry slot

and down

1)

2)

up

screen



c) Inside the lens compartment (with the front cover removed), locate 4 screws that hold the lens positioned and loosen the screws (about 6 turns).

d) Twist the projection lens to center and straighten the bottom of the picture.

a) In the same front lens compartment area at the right of the lens, loosen the focus screw.b) Move the screw up or down to focus the picture at the center.c) Tighten.d) Reassemble the front cover.

Projection lens

LCD

Icons

bezel

Bezel center Position pattern

1. Centering

1. Lens compartment

Focus Adj

1. Straighten the Picture

2. Adjust Mechanical Focus


Contents











Video ProcessSignal Levels are marked. Vac = DVM set to AC


Audio Process


Useful Part NumbersDescription Part Number S/M #

OEM Remote Control N2QAYB000103 (X models)N2QAYB000100 (Z models)

none

TV Power Supply Bd.* The p/n is dependent upon the model number letter. E.g. PT56LCX70 uses a A suffix pwr supply.

LSEP3237A * (X models)LSEP3237B * (Z models)

E50

Lamp Power Supply Bd. LSXK0303 223

Rear Bd. LSEP3230A E60

Tuner Bd. LSEP3233A E70

Lamp Assembly LFS4000PA1 50

7 pin fine cable, Main Bd to Lamp. LSJA0635 237

Thermal Fuse LSJA0639 239

Large Fans (lamp assembly cooling. front or rear at CN2751 or CN2752)

L6FAYYYH0053 each one 207

Small Fan (on lamp assembly) (CN2753) LSRF0016 74

Opt Fan (inside light engine) (CN2754) replace light engine none

Mirror 50” TV / 56” TV / 61” TV 50” LSDL 0411 56” “ 0311 61” “ 0312

58

720p “X” models

1080p “Z” models

PT-xxLCX 7/70 and PT-xxLCZ 7/70 series Panasonic LCD PTV


End

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Pwr Pwr lampButton LED LED

“LIFI” series $1.5k – 2k list priceLIFI = LIght FIdelity

Contents:

Service Policy

Board Access

No Start Up

Shutdown

Service Mode

Adjustments

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