Saturday, February 20, 2016

YAMAHA AV RECEIVER RX-V2065 - HTR-6295 – Firmware update – Self diagnostics – Protection mode – AV Receiver repair and service

                                                Category: AV Receiver Repair and Service 

Contents of this article 
  • Firmware update procedure 
  • Self diagnostics
  • Protection function 

YAMAHA RX-V2065 - HTR-6295

UPDATING FIRMWARE
Confirmation of firmware version and checksum
Before and after writing 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. (See “SELF-DIAGNOSTIC FUNCTION”)
Using the sub-menu, have the firmware version and checksum displayed, and note down them.
Supplementary information:
In this unit, it is possible to check the firmware version by using the ADVANCED SETUP menu as well as the selfdiagnostic function menu. Follow the procedures below.
1. While pressing the “STRAIGHT” key of this unit, press the “MAIN ZONE ON/OFF” key of this unit to turn on the power.
The ADVANCED SETUP mode is activated, and “ADVANCED SETUP” is displayed.
2. Rotate the “PROGRAM” knob and select the “VER---.---.---” After a few seconds, each firmware version is displayed.
3. Press the “MAIN ZONE ON/OFF” key of this unit to turn off the power.
Writing method using the USB
Required Tools
# USB storage device
# Firmware RX-V2065 : RX-V2065_xxxx.bin
HTR-6295 : HTR-6295_xxxx.bin
# Preparation
1. Download the latest firmware from the specified download source to the folder of the PC.
2. Copy the latest firmware from the PC to the root folder of the USB storage device.
Note: When the firmware is copied to a sub-folder of the USB storage device, the update will not proceed.
# Operation procedures
1. Insert the USB storage device to the USB terminal located on the front panel of this unit.
2. While pressing the “TONE CONTROL” key of this unit, c onnect the power cable to the AC outlet.  Writing of the firmware is started and the screen is displayed as shown below.
3. When writing of the firmware is completed, “UPDATE SUCCESS” is displayed.
* When “UPDATE FAIL” is displayed before writing is completed, perform the operation procedures from step 1 to 2 again.
4. Press the “MAIN ZONE ON/OFF” key of this unit to turn off the power.
5. Remove the USB storage device from the USB terminal of this unit.
6. 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 then check that they are the same as
written ones.
* When the displayed firmware version and checksum are different from written ones, perform the “Writing the Firmware” procedure all over again.
7. Press the “MAIN ZONE ON/OFF” key to turn off the power.
Writing method using PC (RS232C)
Required Tools
# Firmware downloader program
For main microprocessor:
DSP_FLASHER_v3.0.exe
For DSP (TI flash ROM):
DSP_FLASHER Ver2.7.exe
# Firmware
For main microprocessor: V265xxxx.mot
For DSP (TI flash ROM):
Vx65_data1_verxxxxxr.hex
Preparation and precautions
# Download the firmware downloader program and the firmware from the specified source to the same folder of the PC.
# Prepare the above specified RS232C cross cable.
# While writing the firmware, keep the other application software on the PC closed.
It is also recommended to keep the software on
the task tray closed as well.
# Connection
1. Remove the top cover.
2. Connect the writing port (CB27 of DIGITAL P.C.B.) of this unit to the serial port (RS232C) of the PC with RS232C cross cable, RS232C conversion adaptor and flexible flat cable.
3. Set the switch (SW7) of RS232C conversion adaptor.
# RS232C conversion adaptor (Part No.: WR492800)
Writing to the main microprocessor
1. With the power cable of this unit disconnected from the AC outlet, start up DSP_FLASHER_v3.0.exe.
The screen appears as shown below.
2. Click [Brows] and select the firmware name.
3. Connect the power cable of this unit to the AC outlet.
4. Click [E.P.] to start writing.
5. When writing of the firmware is completed, “Program Finished!” is displayed.  Click [OK].
6. Click [EXIT] to end DSP_FLASHER_v3.0.exe.
7. Disconnect the power cable of this unit from the AC outlet.
8. Remove the RS232C conversion adaptor and flexible flat cable from the writing port (CB27, DIGITAL P.C.B.) of this unit.
9. 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 then check that they are the same as written ones.
* When the firmware version and checksum are different from written ones, perform the “Writing to the microprocessor” all over again.
10. Press the “MAIN ZONE ON/OFF” key of this unit to turn off the power.
11. Disconnect the power cable of this unit from the AC outlet.
Writing to DSP
1. With the power cable of this unit disconnected from the AC outlet, start up DSP_FLASHER Ver2.7.exe.
The screen appears as shown below.
2. Click [Vx61 DSP].
3. Click [Brows] and select the firmware name.
4. Click [RDY].
5. While pressing the “PURE DIRECT” key of this unit, connect the power cable of this unit to the AC outlet.  Writing is started automatically.
6. When writing of the firmware is completed, “Vx61 DSP Flash finished!” is displayed.
7. Click [EXIT] to end DSP_FLASHER_v2.7.exe.
8. 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 then check that they are the same as written ones.
* When the firmware version and checksum are different from written ones, perform the “Writing to DSP” all over again.
9. Press the “MAIN ZONE ON/OFF” key of this unit to turn off the power.
10. Disconnect the power cable of this unit from the AC outlet.
11. Remove the RS232C conversion adaptor and flexible flat cable from the writing port (CB27, DIGITAL P.C.B.) of this unit.
Starting Self-Diagnostic Function
While pressing TONE CONTROL and PURE DIRECT in the unit, press the “MAIN ZONE ON/OFF” 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 trouble shoot, cancel the protection function as described 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 those 2 keys as shown in the figure above, press the “MAIN ZONE ON/OFF” key to turn on the power and keep pressing those 2 keys and “MAIN ZONE ON/OFF” 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 of this unit 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 stored, be sure to select PRESET INHIBITED (Memory initialization inhibited).
2. Press the “MAIN ZONE ON/OFF” key of this unit to turn off the power.
Display provided when Self-Diagnostic Function started
The display is as described below depending on the situation when the last time the power to this unit is turned off.
When the power is turned off by usual operation:
The FL display of this unit displays “NO PROTECT” then the main menu (sub-menu “1. ANALOG BYPAS” of main menu 1 BYPASS) a few seconds later.
When the protection function worked to turn off the power:
The FL display of this unit displays the data of protection function which worked at that time then the main menu (sub-menu “1.
ANALOG BYPAS” of main menu 1 BYPASS) a few seconds later.
Note: At that time if you reactivate the self-diagnostic function after turning off the power once by pressing the “MAIN
ZONE ON/OFF” key, “NO PROTECT” will be displayed because that situation is equal to “1. When the power is turned off by usual operation:” described above.
However the protection function history is stored in a backup memory. For details, refer to main menu 21 PROTECTION HISTORY.
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.
Note
#Applying the power to this unit without correcting the abnormality can be dangerous and cause additional circuit damage. To avoid this, if protection function has been activated 3 times continuously, the power will not turn on even when the “MAIN ZONE ON/OFF” key is pressed. In order to turn on the power again, disconnect the power cable of this unit from the AC outlet once and then reconnect it again.
# The output transistors in each amplifier channel should be checked for damage before applying power of this unit.
Amplifier current should be monitored by measuring DC voltage across the emitter resistors for each channel.
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 from 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 second and the power supply will be shut off.
When the protection function worked due to excessive heatsink temperature.
Cause: The temperature on 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 second and the power supply will be shut off.
* For detection of each protection function, refer to main menu described later
History of protection function
When the protection function has worked, its history is stored in memory with a backup.
Even if no abnormality is noted while servicing the unit, an abnormality which has occurred previously can be defined as long as the backup data has been stored.
For details of the history of protection function, refer to main menu 21 PROTECTION HISTORY.
The history of the protection function is cleared when self-diagnostic function is cancelled by selecting PRESET RESERVED (Memory initialized) of main menu 24 or when the backup data is erased.