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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
Slide # 3 Model PT-xxLCX70National Training
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
Slide # 4 Model PT-xxLCX70National Training
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
Slide # 5 Model PT-xxLCX70National Training
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
Slide # 6 Model PT-xxLCX70National Training
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
Slide # 7 Model PT-xxLCX70National Training
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.
Slide # 8 Model PT-xxLCX70National Training
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
Slide # 9 Model PT-xxLCX70National Training
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
Slide # 10 Model PT-xxLCX70National Training
Lamp ass’y
3) Remove 6 screws. Then, slide out the Lamp ass’y.
Lamp Removal Details 2/3
Slide # 11 Model PT-xxLCX70National Training
Lamp unit
Lamp unit
Lamp Removal Details 3/3
4) Then, remove the 4 Plates from Lamp ass’y.(11 screws)
Lamp Assembly
Slide # 12 Model PT-xxLCX70National Training
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.
Slide # 13 Model PT-xxLCX70National Training
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
Slide # 14 Model PT-xxLCX70National Training
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
Slide # 15 Model PT-xxLCX70National Training
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.
Slide # 16 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
Slide # 17 Model PT-xxLCX70National Training
Layout – Rear View
Slide # 18 Model PT-xxLCX70National Training
Layout – Top View
Slide # 19 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
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
Slide # 21 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
Slide # 22 Model PT-xxLCX70National Training
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).
Slide # 23 Model PT-xxLCX70National Training
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.
Slide # 24 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
Slide # 25 Model PT-xxLCX70National Training
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.
Slide # 26 Model PT-xxLCX70National Training
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
Slide # 27 Model PT-xxLCX70National Training
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.
Slide # 28 Model PT-xxLCX70National Training
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.
Slide # 29 Model PT-xxLCX70National Training
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
Slide # 30 Model PT-xxLCX70National Training
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.
Slide # 31 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
Slide # 32 Model PT-xxLCX70National Training
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)
Slide # 33 Model PT-xxLCX70National Training
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.
Slide # 34 Model PT-xxLCX70National Training
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
Slide # 35 Model PT-xxLCX70National Training
Lamp GlowUsing method 2
CN6005 socket
CN6005 plug
Slide # 36 Model PT-xxLCX70National Training
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
Slide # 37 Model PT-xxLCX70National Training
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.
Slide # 38 Model PT-xxLCX70National Training
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.
Slide # 39 Model PT-xxLCX70National Training
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.
Slide # 40 Model PT-xxLCX70National Training
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
Slide # 41 Model PT-xxLCX70National Training
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
Slide # 42 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
Slide # 43 Model PT-xxLCX70National Training
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
Slide # 44 Model PT-xxLCX70National Training
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.
Slide # 45 Model PT-xxLCX70National Training
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
Hint: Hold the remote in your left hand. The IR sensor is at the TV left.
a) Press remote buttons 1 or 2 to get to SRV - TOOL
main
sub
SOS = Stored Error Codes
Slide # 46 Model PT-xxLCX70National Training
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
Hint: Hold the remote in your left hand. The IR sensor is at the TV left.
Slide # 47 Model PT-xxLCX70National Training
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 #)
Hint: Hold the remote in your left hand. The IR sensor is at the TV left.
Slide # 48 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
Slide # 49 Model PT-xxLCX70National Training
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
Slide # 50 Model PT-xxLCX70National Training
After Light Engine Replacement 2/3
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
Slide # 51 Model PT-xxLCX70National Training
After Light Engine Replacement 3/3
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
Slide # 52 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
Slide # 53 Model PT-xxLCX70National Training
Video ProcessSignal Levels are marked. Vac = DVM set to AC
Slide # 54 Model PT-xxLCX70National Training
Audio Process
Slide # 55 Model PT-xxLCX70National Training
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
Slide # 56 Model PT-xxLCX70National Training
End
Panasonic Thanks You for sharing your time with us.
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