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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All posts are presented here for informative, historical and educative purposes as applicable within fair use. NOTHING HERE IS FOR SALE !

Tuesday, 5 February 2019

PANASONIC NA8ML COLOR TELEVISION CT32SX31, CT36SX31 – HOW TO ENTER SERVICE MODE – ADJUSTMENTS

Panasonic NA8ML color television CT32SX31, CT36SX31 – How to enter service mode – Adjustments

Models            Chassis
CT-32SX31E    BP371
CT-32SX31UE BP371
CT-32SX31CE BP371
CT-36SX31E    BP372
CT-36SX31UE BP372
CT-36SX31CE BP372
Serviceman Mode Electronic Controls
This Receiver has electronic technology using the I²C Bus Concept. It performs as a control function and it replaces many mechanical controls. Instead of adjusting mechanical controls individually, many of the control functions are now performed by using “On Screen Display Menu”. (The Serviceman Adjustment Mode.)
[it is suggested that the technician reads all the way through and understand the following procedure for Entering/Exiting the Serviceman Adjustment Mode]

Quick Entry to Serviceman Mode
At times when minor adjustments need to be done to the electronic controls, the method of Entering the serviceman Mode without removal of the cabinet back is as follows using the Remote Control:
1. Select SET-UP icon and select CABLE mode.
2. Select TIMER icon and set SLEEP time for 30 Min.
3. Press ACTION button 3 times to exit menus.
4. Tune to the Channel 124.
5. Adjust VOLUME to minimum (0)
6. Press the VOL◄  button (decrease) on Receiver. Red “CHK” appears in upper corner.
To toggle between Aging and Serviceman modes

While the “CHK” is displayed on the left top corner of the CRT, pressing the Action and the Volume Up buttons on the Receiver simultaneously will toggle between the modes. Red “CHK” for Serviceman and yellow “CHK” for Aging.
7. Press the Power Button on the Remote Control to select one of the Serviceman Adjustment Modes.
1) B= Serviceman VCJ SUB-DATA ADJUSTEMENT.
2) C= Serviceman VCJ CUT-OFF ADJUSTMENT.
3) D= Serviceman GEOMETRY ADJUSTMENT.
4) M= Serviceman MTS ADJUSTMENTS.
5) P= Serviceman PIP ADJUSTMENT.
6) S= Serviceman S OPTION ADJUSTMENTS.
7) X = Serviceman X OPTION ADJUSTMENT.
8) E = Serviceman E OPTION ADJUSTMENTS
9) “CHK” = Normal operation of CHANNEL ▲▼ and VOLUME ◄►
( Only the applicable settings for the receiver serviced will be available)
Exiting the Serviceman Mode
Press the Action and the Power buttons on the Receiver simultaneously for at least 2 seconds.
THE RECEIVER EXITS SERVICEMAN MODE
The Receiver momentarily shuts off; then comes back on tuned to channel 3 with a preset level of sound.  Any programmed channels, channels caption data and some others user defined settings will be erased.
Note: Always Exit the serviceman mode following adjustments.
Press the Power Button on the Remote Control to select the Serviceman Adjustment.
1.Press Channel Up/Down on the Remote Control to select one of the available Service Adjustments.
Note: Write Down the original value set  for each address before modifying anything. It is easy to erroneously adjust the wrong item.
2.Press Volume Up/Down on the Remote Control to adjust the level of the selected Service Adjustment.
Click on the pictures to magnify
For Adjustments
1.Press Channel Up/Down on the Remote Control to select one of the available Service Adjustments.  Write Down the original value set for each address before modifying anything. It is easy to erroneously adjust the wrong item.
2.Press Volume Up/Down on the Remote Control to adjust the level of the selected Service Adjustment.
1.Press Channel Up/Down on the Remote Control to select one of the available Service Adjustments.  Write Down the original value set for each address before modifying anything. It is easy to erroneously adjust the wrong item.
Follow the above instructions before select and adjust each available item shown  below.
To Check the Purity
Press the Recall Button on the Remote Control when in Serviceman Mode (red “CHK” is displayed) to enter the Purity Field Check Mode.
Chassis Service Adjustment Procedures
All service adjustments are factory preset and should not require adjustment unless controls and/or associated components are replaced.
Note: Connect the (-) lead of the voltmeter to the appropriate ground. Use heat sink when the HOT ground symbol ▼is used. Otherwise, use COLD ground (Gnd ) — Tuner shield.
MOMENTARILY CONNECT A JUMPER FOR ENTERING SERVICE MODE (TP8 to COLD GND)
140.0V B+ Voltage Confirmation
1. Set the Bright and the Picture to Minimum by using the Picture Menu.
2. Connect the DVM between TPP17 (+ side) and cold ground ( ).
3. Confirm that B+ voltage is 140.0V ± 1.5V. This voltage supplies B+ to the Horizontal Output & Flyback circuits.
Posted By: FRANK at 06:23
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