REPAIRING AND NOT THROWING AWAY

REPAIRING AND NOT THROWING AWAY

Richtige Fernseher haben Röhren!

Richtige Fernseher haben Röhren!

In Brief: On this site you will find pictures and technical information about Service Modes, Circuit Diagrams, Firmware Update procedure, Disassemble procedure, Universal remote control set-up codes, Troubleshooting and more....

If you go into the profession, you will obtain or have access to a variety of tech tips databases HERE IT IS Master Electronics Repair !.

These are an excellent investment where the saying: 'time-is-money' rules. However, to learn, you need to develop a general troubleshooting approach - a logical, methodical, method of narrowing down the problem. A tech tip database might suggest: 'Replace C536' for a particular symptom. This is good advice for a specific problem on one model. However, what you really want to understand is why C536 was the cause and how to pinpoint the culprit in general even if you don't have a service manual or schematic and your tech tip database doesn't have an entry for your sick TV or VCR.

While schematics are nice, you won't always have them or be able to justify the purchase for a one-of repair. Therefore, in many cases, some reverse engineering will be necessary. The time will be well spent since even if you don't see another instance of the same model in your entire lifetime, you will have learned something in the process that can be applied to other equipment problems.
As always, when you get stuck, checking out a tech-tips database may quickly identify your problem and solution.In that case, you can greatly simplify your troubleshooting or at least confirm a diagnosis before ordering parts.

Happy repairing!
Today, the West is headed for the abyss. For the ultimate fate of our disposable society is for that society itself to be disposed of. And this will happen sooner, rather than later.

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..............The bitterness of poor quality is remembered long after the sweetness of todays funny gadgets low price has faded from memory........ . . . . . .....
Don't forget the past, the end of the world is upon us! Pretty soon it will all turn to dust!

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Friday 24 April 2020

PANASONIC LCD PROJECTOR PT-LC150 HOW TO ENTER THE SERVICE MODE, SERVICE MODE AND CIRCUIT ADJUSTMENT DETAILS, INITIALIZE THE PROJECTOR

Applicable to  Panasonic LCD Projector PT-LC50U PAL/SECAM/NTSC/PAL-M/PAL-N/NTSC4.43, PT-LC50U, PT-LC50E, PT-LC150 
Projector lamp
130 W UHM Lamp
LCD panels
0.7” Poly silicon LCD panel × 3,
RGB shutter method, using Translucent TN crystal panels.
How to display Lamp operation time (Service Mode)
1. Under the condition of the Lamp Cover SW “ON”, plug in the Power Cord.
2. Input a Signal.
3. Connect a jumper wire between TP2007 and TP2008 on Main C.B.A. for over 5 seconds as shown.
4. Lamp operation time will be displayed as shown.
5. Connect a jumper wire between TP2007 and TP2008 for over 5 seconds again or press MENU button on remote control in order to release from service mode.
[After replacing Main C.B.A., memory data such as history of lamp operation time will be reset. However, it can be remained by installing EEPROM IC (IC2006) to replaced Main C.B.A. from original Main C.B.A]
How to initialize EEPROM IC
If EEPROM IC (IC2006) on Main C.B.A. are replaced:
After replacing EEPROM IC (IC2006), be sure to perform each of following steps in the order presented.
1. Connect a jumper wire between TP2017 and TP2018 on Main C.B.A. for over 5 seconds to set to factory set mode. Then, remove the jumper wire.
2. “FACTORY” appears on screen.
3. Connect a jumper wire between TP2017 and TP2018 again for over 5 seconds to initialize EEPROM IC. Then, remove the jumper wire.
4. “SELF CHECK” appears on screen.
5. Remove jumper wires and “MEMORY OK” appears on screen.
6. Perform adjustments;
7. After completing all adjustments, press the MENU button to memorize adjustment data in EEPROM IC and release from the Factory Adjust mode. Otherwise, adjustment data will be cancelled.
[When initializing EEPROM IC, memory data such as history of lamp operation time and adjustment data will be reset.]
Lamp replacement procedure
Because of possibility of injury, strictly follow the replacement procedure below.
1. After the cooling fan has stopped, and STANDBY(R) ON(G) indicator turns solid red, unplug the power cord.
Note: Please wait more than one hour for lamp replacement.
[ If you need to replace the lamp more urgently ]
- The LCD Projector has a forced cooling feature. After the POWER switch is turned OFF, and sometime during about the first minute of the normal cooling fan operation, press MENU for 5 seconds. The cooling fan will change to high speed forabout 10 minutes. (The "C-d" STATUS CODE will be displayed.)
Loosen 2 fixing screws of lamp cover unit using a screwdriver.
3. Remove the Lamp Cover Unit.
4. Push the portion of the Lamp Hold Lever and release the Lamp Hold Lever from the Fastening Hook.
5. Carefully pull the Lamp Unit.
WARNING:
- The lamp may be hot. Be careful when handling.
CAUTION
- High-pressure lamp may explode if improperly handled.
- Danger of injury due to lamp fragments.
6. Install the new Lamp Unit.
Caution:
- Make sure that the Lamp Hold Lever is in the original position.
- Properly dispose of old Lamp.
7. Replace 2 screws (A) using a screwdriver.
8. Plug the power code.
9. Press POWER and INPUT buttons together for about 5 seconds when lighting up red by POWER LED to reset lamp time.
Cleaning the Projection Lens
Use lens cleaning paper and cleaner available at your local camera shop, etc.Dampen
the cleaning paper with cleaner and gently wipe the surface of the lens from the
center outward to remove dust.
Do not use excessive force when cleaning the lens.
Removal and Installation of Flexible Cable
- Removal
(Type A)
1. On the Trap Connector, swing the Locking Tab to release the Trap portion of the Connector. Then pull Flexible Cable out to remove.
(Type B)
1. On the Trap Connector, swing both ends of the Locking Tab to release the Trap portion of the Connector. Then pull Flexible Cable out to remove it.
External Interface (RS-232C)
Through connection with external equipment (e.g. personal computer), it can control the projector from outside or can inquire about status.
Lamp control command or inquiry command can be received ordinarily.
- Other commands can be received when lamp is set at ON only.
(When lamp is set at OFF, it does communication response to command only and does no actual work.)
Communication
- Speed : 19 200 bps (ordinary control)
- Parity : NONE
- Split bit : 1 bit
- Character length : 8 bit
- XON/OFF : NONE
2. Connection
In this case, the projector is DCE (Data Circuit Ending device). Connect it with the personal computer by a straight cable.
3. Configuration of Command
A. Command Format (Personal computerProjector)
B. Response (Projector→Personal computer)
At the end of a command, either one of the following is returned.
Put the response data between [STX] and [ETX] , and with [ACK] at the end.
(At a normal end)
- On execution of a control command.
[STX] [Command] [(parameter)] [ETX] [ACK]
- On execution of a inquiry command
[STX] [(parameter)] [ETX] [ACK]
(At an abnormal end, or on reception of an invalid command/parameter))
- [STX] E R 4 N2 N3 [ETX] [ACK]
N2 and N3 show error contents.
- ER401 = Command invalid (or abnormal end)
- ER402 = Parameter invalid.
The “FACTORY ADJUST” mode
All Electrical Adjustments are performed on the “FACTORY ADJUST” mode which is used remote control unit instead of variable resistor to control the adjustment value.
1. Connect a jumper wire between TP2017 and TP2018 on Main C.B.A. for over 5 seconds to enter the “FACTORY ADJUST” mode.
2. Press the POWER button once.
3. While "Please press POWER button again to power off." is displayed, press the MENU button.
4. Press UP/DN button on remote control to select and press the ENTER button to set the item to be adjusted.
Note:
Do not adjust all items in “DIGITAL
ADJUST”, and VIDEO BRIGHT in
“VIDEO/RGB ADJUST, and GAMMA R, G, B in “LCD/FAN ADJUST”
TEST EQUIPMENT
To do all of these adjustments, the following equipment is required.
1. Dual-Trace Oscilloscope
Voltage Range : 0.001~50 V/Div.
Frequency Range : DC~50 MHz
Probes : 10:1, 1:1
2. NTSC Video Pattern Generator
3. Plastic Tip Driver and Non-Metal Driver
4. (+) Screwdriver and (-) Screwdriver
5. Hexagon Wrench (2.5 mm)
6. Standard Screen
7. DVM (Digital Volt Meter)
8. Programmable Video Signal Generator
9. Test pattern signal (not supplied)
10. Luminance Color Meter
11. Jumper wire.
ADJUSTMENT PROCEDURES
1. Connect a jumper wire between TP2017 and TP2018 on Main C.B.A. for over 5 seconds to set to the “FACTORY ADJUST” mode.
2. Press the POWER button once.
3. While "Please press POWER button again to power off." is displayed, press the MENU button.
4. Press UP/DN button on remote control to select “VIDEO/RGB ADJUST” mode,
and press ENTER buttonto set to “VIDEO/RGB ADJUST” mode.
5. After completing adjustments 5.4.1. through 5.4.4., press the “MENU ” button to release from “VIDEO/RGB ADJUST” mode. (Adjustment data is memorized in EEPROM IC (IC2006) by pressing “MENU ” button.)Otherwise, adjustment data will be cancelled.
1. Connect a jumper wire between TP2017 and TP2018 on Main C.B.A. for over 5 seconds to set to the “FACTORY ADJUST” mode.
2. Press the POWER button once.
3. While "Please press POWER button again to power off." is displayed, press the MENU button.
4. Press UP/DN button on remote control to select “LCD/FAN ADJUST” mode, and press ENTER button to set to “LCD/FAN ADJUST” mode.
5. After completing adjustments press the “MENU ” button to release from “LCD/FAN ADJUST” mode. (Adjustment data is memorized in EEPROM IC (IC2006)by pressing “MENU ” button.) Otherwise, adjustment data will be cancelled.
LCD VOLTAGE ADJUSTMENT
To set the standard voltage for LCD panel.  Symptom of Misadjustment: LCD panel may be damaged.
Test points: TP1904, TP1907: MAIN C.B.A.
1. Connect the DVM (Digital Volt Meter) to TP1904.
2. Press UP/DN button on the remote control to select “15.3V”.
3. Press < / > button so that the voltage shown in the display of DVM is 15.3 V ± 0.05 V DC.
RGB INPUT LEVEL ADJUSTMENT
To set the optimum signal level.
Symptom of Maladjustment: The picture will be too light or too dark.
Test points: TP3501, TP3502, TP3503: Main C.B.A.
1. Supply Gray Scale Pattern Signal (3 scales).
2. Connect the oscilloscope to TP3501.
3. Press Up/Dn button on remote control to select “R BRIGHT”.
4. Press < / > button so that Black level becomes the same as OSD Black level.
5. Select “R LEVEL”, and press < / > button so that White level becomes the same as OSD White level.
6. Connect the oscilloscope to TP3502.
7. Press Up/Dn button on remote control to select “G BRIGHT”.
8. Press < / > button so that Black level becomes the same as OSD Black level.
9. Select “G LEVEL”, and press < / > button so that White level becomes the same as OSD White level.
10. Connect the oscilloscope to TP3503.
11. Press Up/Dn button on remote control to select “B BRIGHT”.
12. Press < / > button so that Black level becomes the same as OSD Black level.
13. Select “B LEVEL”, and press < / > button so that White level becomes the same as OSD White level.
VIDEO INPUT ADJUSTMENT
To set the optimum signal level.
Symptom of Maladjustment: The picture will be too light or too dark.
Test point: TP3502: Main C.B.A.
1. Supply Gray Scale Pattern Signal (3 scales).
2. Connect the oscilloscope to TP3502.
3. Press Up/Dn or MENU button on remote control to select “VIDEO LEVEL”.
4. Press < / > button so that the white level becomes the same as OSD white level.
COMPONENT VIDEO COLOR ADJUSTMENT
To set the optimum signal level.
Symptom of Maladjustment: The picture will be too light or too dark.
Test point: TP3503: Main C.B.A.
1. Supply Component Video 480P Blue 100 % Raster Signal.
(Refer to “System Configuration Example” of “2 OPERATION GUIDE”)
2. Connect the oscilloscope to TP3503.
3. Press Up/Dn button on remote control to select “YPBPR COLOR”.
4. Press < / > button so that the Blue level becomes the same as OSD White level.
[After completing adjustments, press the “MENU ” button to release from “VIDEO/RGB ADJUST” mode. (Adjustment data is memorized in EEPROM IC (IC2006) by pressing “MENU ” button.)Otherwise, adjustment data will be cancelled.
LCD COMMON ADJUSTMENT
To set the optimum LCD common voltage.
This adjustment should be done in a darkroom.
Symptom of Maladjustment: The picture will be bluish or reddish.
1. Supply 70 % Red Horizontal Signal and project on the screen.
2. Press Up/Dn button on remote control to select “VCOM R”.
3. Press < / > button so that the flicker on the whole screen becomes minimal.
4. Supply 70 % Green Horizontal Signal and project on the screen.
5. Press Up/Dn button on remote control to select “VCOM G”.
6. Press < / > button so that the flicker on the whole screen becomes minimal.
7. Supply 70 % Blue Horizontal Signal and project on the screen.
8. Press Up/Dn button remote control to select “VCOM B”.
9. Press < / > button so that the flicker on the whole screen becomes minimal.
[When the flicker is hard to see in the screen in step 1, 4, 7, press or button on remote control to select “BLACK LEVEL”,and press or button so that it appears. However, be sure to return “BLACK LEVEL” to previous value after LCD COMMON adjustment .]
WHITE LEVEL ADJUSTMENT
To set the optimum signal level.
Symptom of Maladjustment: The picture will be too light or too dark.
Test point: TP3505: Main C.B.A.
Symptom of Maladjustment: The picture will be too light or too dark.
Supply Gray Scale Pattern Signal (3 scales).
2. Connect the oscilloscope to TP3505.
3. Press Up/Dn button on remote control to select “WHITE LEVEL”.
4. Press < / > button so that level A becomes 3.7 V ± 0.05 V [p-p].
BLACK LEVEL ADJUSTMENT
To set the optimum signal level.
Symptom of Maladjustment: The picture will be too light or too dark.
This adjustment should be done in a darkroom.
Supply Green Level Adjustment Signal and project on the screen.
2. Press Up/Dn button on remote control to select “BLACK LEVEL”.
3. Press < / > button so that Portion (B) are invisible and Portion (A) are visible on the screen.
WHITE BALANCE ADJUSTMENT
To set the standard white level for each color temperature.
Symptom of Maladjustment: White will become bluish or reddish.
This adjustment should be done in a darkroom.
Method-1
Supply Gray Scale Pattern Signal (10 scales) and Project on the screen.
2. Press Up/Dn button on remote control to select “CUTOFF R” or “CUTOFF B”.
3. Press < / > button to adjust “CUTOFF R” or “CUTOFF B” so that the area around 4rdand 6th scale (A) becomes pure gray with no red or blue tint.
Method 2
1. Supply 50 % White Pattern Signal (0.35 V [p-p]) and project on the screen.
2. Press Up/Dn button on remote control to select “CUTOFF R” or “CUTOFF B”.
3. Press < / > button to adjust “CUTOFF R” or “CUTOFF B” so that color
temperature (K)and its deviation (uv) at the center of screen are 9500 K ± 1000 K
and 0.015 uv + 0.003 uv - 0.005 uv respectively by Luminance Color Meter.
Note: After completing adjustments, press the “MENU ” button to release from “LCD/FAN ADJUST” mode. (Adjustment data is memorized in EEPROM IC (IC2006) by pressing “MENU ” button.) Otherwise, adjustment data will be cancelled.
FULL MIRROR ADJUSTMENT
To set the Full Mirror in the proper position.
Symptom of Maladjustment: The non-uniformity color will appear.
Adjust the right and left sides of the screen by adjusting portion (a), portion (b) or portion (c) and adjust the top and bottom sides of the screen by adjusting back and forth direction.
FULL MIRROR ADJUSTMENT
A. Supply 100 % Green Signal and project on the screen.
B. Loosen 2 Screws (A) of the Full Mirror.
C. Insert a (-) screwdriver into Portion (a) and move the Full Mirror in the direction shown by the arrows so that color uniformity is achieved over the whole screen. And then tighten 2 Screws (A).
FULL MIRROR RED-2 ADJUSTMENT
A. Supply 100 % Yellow Signal and project on the screen.
B. Loosen 2 Screws (B) of the Full Mirror Red-2.
C. Insert a (-) screwdriver into Portion (b) and move the Full Mirror Red-2 in the direction shown by the arrows so that color uniformity is achieved over the whole screen. And then tighten 2 screws (B).
FULL MIRROR Blue ADJUSTMENT
A. Supply 100 % White Signal and project on the screen.
B. Loosen 2 Screws (C) of the Full Mirror Blue.
C. Insert a (-) screwdriver into Portion (c) and move the Full Mirror Blue in the
direction shown by the arrows so that color uniformity is achieved over the whole screen. And then tighten 2 screws (C).
4. If the Full Mirror Blue adjustment cannot be done, repeat step 1 through 2.
[Do not use excessive force when adjusting the Mirror. Otherwise, the Mirror may be damaged.]
POLARIZER ADJUSTMENT
To set the polarizer in the proper position.
Symptom of Misadjustment: The picture will become bluish or reddish or greenish.
POLARIZER RED ADJUSTMENT
1. Supply Black Signal (0 %) and project on the screen.
2. Loosen a Screw (A) of Polarizer Red Unit.
3. Move the Polarizer Red Unit to the right and left so that the whole screen becomes the blackest possible value, and then tighten a Screw (A).
- POLARIZER GREEN ADJUSTMENT
1. Supply Black Signal (0 %) and project on the screen.
2. Loosen a Screw (B) of Polarizer Green Unit.
3. Move the Polarizer Green Unit to the right and left so that the whole screen becomes the blackest possible value, and then tighten a Screw (B).
- POLARIZER BLUE ADJUSTMENT
1. Supply Black Signal (0 %) and project on the screen.
2. Loosen a Screw (C) of Polarizer Blue Unit.
3. Move the Polarizer Blue Unit to the right and left so that the whole screen becomes the blackest possible value, and then tighten a Screw (C).
DUCT FAN SPEED ADJUSTMENT
To set the optimum turn speed of the Duct Fan.
Symptom of Maladjustment:
Temperature of the LCD projector becomes too high or sound of the Duct Fan becomes loud.
Test points: TP1961, TP1907: MAIN C.B.A.
Connect the DVM (Digital Volt Meter) to TP1961.
2. Press Up/Dn  or MENU button on the remote control to select “FAN1/2 SPEED”.
3. Press < / > button so that the voltage shown in the display of DVM is 8.0 V ± 0.05 V DC.
POWER FAN AND LAMP FAN SPEED ADJUSTMENT
To set the optimum turn speed of the Power Fan and Lamp Fan.
Symptom of Maladjustment:
Temperature of the LCD projector becomes too high or sound of the Power Fan and Lamp Fan becomes loud.
Test points: TP1962, TP1907: MAIN C.B.A.
Connect the DVM (Digital Volt Meter) to TP1962.
2. Press Up/Dn button on the remote control to select “FAN3/4 SPEED”.
3. Press < / > button so that the voltage shown in the display of DVM is 8.0 V ± 0.05 V DC.
Note: After completing adjustments, press the “MENU ” button to release from “LCD/FAN ADJUST” mode. (Adjustment data is memorized in EEPROM IC (IC2006) by pressing “MENU ” button.)Otherwise, adjustment data will be cancelled.
Posted By: FRANK at 00:46
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