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!

©2010, 2011, 2012, 2013, 2014 Frank Sharp - You do not have permission to copy photos and words from this blog, and any content may be never used it for auctions or commercial purposes, however feel free to post anything you see here with a courtesy link back, btw a link to the original post here , is mandatory.
All posts are presented here for informative, historical and educative purposes as applicable within fair use. NOTHING HERE IS FOR SALE !

Wednesday 10 April 2019

YAMAHA YHT-196 HTR 2064 – FIRMWARE UPDATE PROCEDURE – INITIALIZATION – SELF DIAGNOSTICS – PROTECTION MODES AND CAUSES

Yamaha HTR-2064 – YAMAHA YHT-196 HTR 2064

UPDATING FIRMWARE
Confirmation of firmware version and checksum
Before and after updating the firmware, check the firmware version and checksum by using the self-diagnostic function menu.
Start up the self-diagnostic function and select “25. ROM VER/SUM/PORT” menu.
Using the sub-menu, have the firmware version and checksum displayed, and note them down.
When the firmware version is different from written one after updating, perform the updating procedure from the beginning again
Initializing the back-up IC (EEPROM: IC222 on DIGITAL P.C.B.)
After updating the firmware, the back-up IC MUST be initialized by the following procedure to store the setting information (soundfield parameters, system memory and tuner presetting, etc.) properly.
Start up the self-diagnostic function and select “24. FACTORY PRESET” menu. (For details, refer to “SELF-DIAGNOSTIC FUNCTION”)
Select “24. PRESET RSRV”, press the “ ” (Power) key to turn off the power once and turn on the power again. Then the back-up IC is initialized.
Connection
Connect a CD/DVD/BD player to this unit as shown below.
Operation Procedures
1. While pressing the “INFO” key, connect the power cable to the AC outlet.
The FIRMWARE UPDATE mode is activated and “CDDA Upgrader” is displayed.
2. Play the firmware CD on the CD/DVD/BD player. Writing of the firmware starts automatically.
3. When writing of the firmware is completed, “Update Success”, “Please...” and “Power off!!” are displayed repeatedly.
If the display remains unchanged for more than 10 seconds after starting the firmware CD play procedure, perform the firmware CD play procedure again from the beginning.
If “FILE CORRUPTED” is displayed after “Address:XXXXXX”, make sure that the data written to the firmware CD is not corrupted and perform Steps 1 to 3 of “Operation Procedures” again.
If “Upgrade Failed” is displayed, perform “operation procedures” from the beginning again.
4. Press the (Power) key to turn off the power.
5. Eject the firmware CD from the CD/DVD/BD player.
6. Start up the self-diagnostic function and check that the firmware version and checksum are the same as written ones.
Starting Self-Diagnostic Function
While pressing the “TONE CONTROL” and “STRAIGHT” keys, press the “ ” (Power) key to turn on the power.
The self-diagnostic function mode is activated.
Starting Self-Diagnostic Function in the protection cancel mode
If the protection function works and causes hindrance to troubleshooting, cancel the protection function by the procedure below, and it will be possible to enter the self-diagnostic function mode.
(The protection functions other than the excess current detect function will be disabled.)
While pressing the “TONE CONTROL” and “STRAIGHT” keys, press the (Power) key to turn on the power and keep pressing those 2 keys and the “ ” (Power) key for 3 seconds or longer.
The self-diagnostic function mode is activated with the protection functions disabled.
In this mode, the “SLEEP” segment of the FL display flashes to indicate that the mode is self-diagnostic function mode with the protection functions disabled.
Canceling Self-Diagnostic Function
1. Before canceling self-diagnostic function, execute setting for FACTORY PRESET of main menu No.24. (Memory initialization inhibited or Memory initialized).
In order to keep the user memory preserved, be sure to select PRESET INHIBITED (Memory initialization inhibited).
2. Press the (Power) key to turn off the power.
Display provided when Self-Diagnostic Function started
The display is as described below depending on the situation when the power to this unit is turned off.
1. When the power is turned off by usual operation:
“NO PROTECT” is displayed. Then “1. ANALOG BYPAS” is displayed in a few seconds.
2. When the protection function worked to turn off the power:
The information of protection function which worked at that time is displayed. Then “1.ANALOG BYPAS” is displayed in a few seconds.
Note: At that time if you restart the self-diagnostic function after turning off the power once, “NO PROTECT” will be displayed. That is because that situation is equal to “1. When the power is turned off by usual operation:”.
When the protection function worked due to excess current.
Cause: An excessive current flowed through the power amplifier.
Supplementary information: As current of the power amplifier is detected, the abnormal channel can be identified by checking the current detect transistor.
Turning on the power without correcting the abnormality will cause the protection function to work immediately and the power supply will instantly be shut off.
When the protection function worked due to a short between speaker terminals.
Cause: The line between speaker terminals is shorted.
Supplementary information: As the excess current is detected after operation of the speaker relay, the shorted speaker terminal and the connected speaker can be identified.
Turning on the power without correcting the abnormality will cause the protection function to work immediately and the power supply will instantly be shut off.
When the protection function worked due to abnormal DC output.
Cause: DC output of the power amplifier is abnormal.
Supplementary information: The protection function worked due to a DC voltage appearing at the speaker terminal. A cause could be a defect in the amplifier.
Turning on the power without correcting the abnormality will cause the protection function to work in 3 seconds and the power supply will be shut off.
When the protection function worked due to abnormal voltage in the power supply section.
Cause: The voltage in the power supply section is abnormal.
Supplementary information: The protection function worked due to a defect or overload in the power supply.
Turning on the power without correcting the abnormality will cause the protection function to work in 1 seconds and the power supply will be shut off.
When the protection function worked due to excessive heatsink temperature.
Cause: The temperature of the heatsink is excessive.
Supplementary information: The protection function worked due to the temperature limit being exceeded.
Causes could be poor ventilation or a defect related to the thermal sensor.
Turning on the power without correcting the abnormality will cause the protection function to work in 1 seconds and the power supply will be shut off.
For detection of each protection function, refer to main menu described later.
Posted By: FRANK at 05:14
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