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 !

Friday, 29 March 2019

YAMAHA U BRACKET UB-DXR8 - UB-DXR10 - UB-DXR12 - UB-DXR15 POWERED SPEAKER – FIRMWARE UPGRADE - TROUBLESHOOTING

YAMAHA U BRACKET UB-DXR8 - UB-DXR10 - UB-DXR12 - UB-DXR15 POWERED SPEAKER – Firmware upgrade - Troubleshooting

How to upgrade the firmware_Troubleshooting - YAMAHA DXR8 DXR10 DXR12 DXR15 - POWERED SPEAKER

SERVICE INSPECTION
With the FRONT LED DISABLE switch turned off (switch is not pressed inward), turn on the power to the AMP UNIT.
After about 4 seconds, the diagnostic mode is activated and all LEDs on the rear panel blink at intervals of 500ms.
Run application for Service inspection (DiagDXRSERVICE.exe).
The following inspection screen is displayed.
Note: If all LEDs on the rear panel do not blink, it’s considered that it started with mode other than diagnostic mode, setup mistake or peripheral circuitry trouble.
INFO inspection
Check VERSION number and MODEL ID by sight.
The result is displayed in property window as shown below.
* It’s possible that the column of value is in blank.
* Example is described in the column of Value.
* If firmware is broken, “firmware is broken” is displayed in VERSION.
VERSION >  V1.00 >  Character string of Version.
MODEL ID >  DXR12 >  Corresponding Model ID.
Troubleshooting
Check signal line between SW (DSP circuit board: SW701) and CPU (DSP circuit board: IC701), and SW itself.
DSP inspection
Communication condition with DSP via I2C-BUS and operational state of inside DSP are inspected automatically.
The result is displayed in output window as shown below.
If “FAIL: DSP COMMUNICATION” is displayed, check wire connection and the following parts.
DSP (DSP circuit board: IC702) and CPU (DSP circuit board: IC701).
AD input port inspection
The voltage (temperature) from T-SENSE port is inspected automatically.
The result is displayed in output window as shown below.
A-MUTE inspection
Conduct level check when analog mute (SP OUT side).
Input measuring result on A-MUTE test.
If result is PASS, click “Yes” button.
If result is FAIL, click “No” button.
When determination of the result based on measurement result by operator is input, the result is displayed in output window as shown below.
If FAIL, check AMPS circuit board.
LINK-MUTE inspection
Conduct level check when analog mute (LINK OUT side).
Input measuring result on LINK-MUTE test.
If result is PASS, click “Yes” button.
If result is FAIL, click “No” button.
If FAIL, check parts (DSP circuit board: TR707 - TR711) and peripheral circuitry and wire connection.
SWITCH inspection
Inspect on | off status of FRONT LED DISABLE switch.
Inspect FOH / MAIN | OFF | MONITOR status D-CONTOUR switch.
Inspect 120 Hz | 100 Hz | OFF status of HPF switch.
Set status of each switch according to the display and click “OK” button.
If result is FAIL, the following display for retry is displayed.
When “Retry” button is clicked, the test is performed again.
When “Cancel” button is clicked, the test is not performed again.
LED inspection
LIMIT LED lights. >  Conduct inspection whether it turns off the light.
SIGNAL LED lights. >  Conduct inspection whether it turns off the light.
PROTECTION LED lights. >  Conduct inspection whether it turns off the light.
POWER LED lights. >  Conduct inspection whether it turns off the light.
D-CONTOUR LED lights. >  Conduct inspection whether it turns off the light.
FRONT LED lights. >  Conduct inspection whether it turns off the light.
Conduct inspection whether all LEDs light or not.
In consideration of a case that operator misses a sequence of action that turns on J off the LED, it’s possible to reconfirm the successive test with “Retry” button.
Determine all LED tests comprehensively.
If result is PASS, click “Yes” button.
If result is FAIL, click “No” button.
FAN inspection
Inspect FAN condition when the speed of FAN is changed.
Inspect the speed of FAN to change and to become early.
Determine FAN tests comprehensively.
If result is PASS, click “Yes” button.
If result is FAIL, click “No” button.
If “FAIL: FAN CHECK” is indicated, check connection of DSP circuit board and AMPS circuit board, and check FAN, and power supply circuit of FAN on AMPS circuit board.
POFF-REQ inspection
Inspect the shutdown of the power supply when POFFREQ is activated.
Click “OK” button and start the POFF-REQ tests.
Determine POFF-REQ tests comprehensively.
If result is PASS, click “Yes” button.
If result is FAIL, click “No” button.
Activating diagnostic mode and application for service inspection
The inspection must be performed with both the diagnostic mode of the unit and the application for service inspection of PC are activated.
Follow the steps below.
> With the FRONT LED DISABLE switch turned off, turn on the power to the amp assembly.
After about 4 seconds, the diagnostic mode is activated and all LEDs on the rear panel blink at intervals of 500 ms.
> Run application for service inspection (DiagDXRSERVICE.exe).
Inspection Items [ Power consumption]
Perform measurement with no signal input.
Confirm that the primal power consumption is 35 W or less.
Adjustment of AMPS Circuit Board
* The tip of the screwdriver for adjustment must be insulation material.
(1) Adjustment of ±VB voltage
2 pin of CN104 is +VB voltage, 6 pin of CN104 is -VB voltage, and of each into the jig tool.
The voltage between CN104 2 pin-CN104 6 pin is measured.
VR101 is adjusted so that the voltage value between
CN104 2 pin-CN104 6 pin may become 110 V±1 V.
(2) Adjustment of basic frequency of VB voltage 4 pin of CN104 is GND, 3 pin of CN104 is VB voltage, and of each into the jig tool.
The frequency of VB voltage is measured.
VR102 is adjusted so that the frequency may become 180 kHz±1 kHz.
Detector circuit of DC protection
(1) The voltage of DC +1 V is added to 1 pin of CN254 of the AMPS circuit board.
The DC protection operates within one second, and “DC-PROTECTION;ON” is displayed on the DIAG application.
The voltage of DC +1 V is stopped, and 1 pin of CN254 is opened.
Protection is released, and “OFF” is displayed on the DIAG application.
 (2) The voltage of DC -1 V is added to 1 pin of CN254 of the AMPS circuit board.
The DC protection operates within one second, and “DC-PROTECTION;ON” is displayed on the DIAG application.
The voltage of DC -1 V is stopped, and 1 pin of CN254 is opened.
Protection is released, and “OFF” is displayed on the DIAG application.
(3) The voltage of DC +1 V is added to 2 pin of CN254 of the AMPS circuit board.  The DC protection operates within one second, and “DC-PROTECTION;ON” is displayed on the DIAG application.
The voltage of DC +1 V is stopped, and 2 pin of CN254 is opened.
Protection is released, and “OFF” is displayed on the DIAG application.
(4) The voltage of DC -1 V is added to 2 pin of CN254 of the AMPS circuit board.
The DC protection operates within one second, and “DC-PROTECTION;ON” is displayed on the DIAG application.
The voltage of DC -1 V is stopped, and 2 pin of CN254 is opened.
Protection is released, and “OFF” is displayed on the DIAG application.
(5) The voltage of DC +1 V is added to between 3 pin and 4 pin of CN254 of the AMPS circuit board.
The DC protection operates within one second, and “DC-PROTECTION;ON” is displayed on the DIAG application.
The voltage of DC +1 V is stopped.
Protection is released, and “OFF” is displayed on the DIAG application.
(6) The voltage of DC -1 V is added to between 3 pin and 4 pin of CN254 of the AMPS circuit board.
The DC protection operates within one second, and “DC-PROTECTION;ON” is displayed on the DIAG application.
The voltage of DC -1 V is stopped.
Protection is released, and “OFF” is displayed on the DIAG application.
Detector circuit of POFF-REQ
Execute POFF-REQ inspection of diagnostic mode.
After POWER LED lights, it is turned off.
Confirm that the power supply shall shut down.
FIRMWARE UPDATE
This firmware updating procedure is applied to DXR8, DXR10, DXR12 and DXR15.
1. Required Tools
• PC; Windows XP with COM1 (RS-232C) port x 1
• Serial Communication Jig (WP327800) x 1
• DSR-CS Wiring Assembly (WW332900) x 1
• RS-232C Cross Cable x 1
Preparation
Download the latest version of application software for updating and firmware from the YSISS homepage and copy them to C drive of personal computer as shown below.
(URL >> http://plaza.yamaha.co.jp/ysiss/exindex.nsf)
> Application software for updating
C:¥DXR¥tools¥Updater¥FlashSta(for DXR).exe
> Firmware
C:¥DXR¥Firmware¥DXR.mot
C:¥DXR¥Firmware¥DXR.id
Connection
Operation procedures
1. Short circuit between pin 3 (CPU-MODE) and pin 1(GND) of connector CN701 on the DSP circuit board, and turn on the power switch. The firmware update mode is activated.
* All indicators on the rear panel do not light at this moment.
2. Execute “FlashSta (for DXR).exe.”.
3. Make sure that the baud rate is set to “115200”.
Click “Setting...[S]” button.
 If “115200” is already selected, click “Cancel” button. If other than “115200” is selected, select “115200” and click “OK” button.
4. Click “F/W Update(W)”button.
5. Click “OK” button to start updating.
After update finished:
6. Click “OK”button. The application ends automatically.
7. Turn off the power switch of AMP UNIT. * When error occurs while writing or writing does not complete although long time has passed, perform the updating procedure again from the beginning.
Problem:
“Update.ini” does not exist in C:¥DXR¥tools¥Updater¥.
Countermeasure:
Store “Update.ini” in C:¥DXR¥tools¥Updater¥, and restart application.
Problem:
“DXR.mot” (Update file) does not exist in file path specified in Update.ini file.
Countermeasure:
Input paths specified in Update.ini file correctly, and restart application.
Problem:
“DXR.id” (ID file) does not exist in file path specified in Update.ini file.
Countermeasure:
Store “DXR.id” (ID file) in path specified in Update.ini file.
Problem:
“DXR.mot” (Update file) and “DXR.id” (ID file) are not registered when starting update.
Countermeasure:
Set Update.ini file correctly or select Update file again.
Problem:
Failed to connect to target.

Countermeasure:

Check the power and connection of the target again.
Problem:
Assigned COM port does not exist, or it cannot opened because in use by other application (e.g. inspection application).
Countermeasure:
Check that COM port assigned in Update.ini file can open properly. If COM port assigned in Update.ini file does not exist on PC, change to a correct port.
Problem:
The target is not firmware update mode.
Countermeasure: Check that the target is started in firmware update mode.