Wednesday, October 06, 2021

Panasonic SA-AKX74LM CD stereo system - How to enter the service mode, self diagnostic, Demonstration lock, D-amp and SMPS schematic, Power board error codes

 

Always respect voltages. It makes sense to avoid exposure to electrical shock.  While some sources are expected to have a possible dangerous impact, others of quite high potential are of limited current and are sometimes held in less regard.

Before Repair

  Disconnect AC power to discharge unit AC Capacitors as such (C5700, C5701, C5703, C5708) through a 10 Ω, 10 W resistor to ground.  DO NOT SHORT-CIRCUIT DIRECTLY (with a screwdriver blade, for instance), as this may destroy solid state devices.
After repairs are completed, restore power gradually using a variac, to avoid over current.

Fuse type: 8A, 125 V

  When the protection circuitry functions, the unit will not operate unless the power is first turned off and then on again.

Protection Circuitry
The protection circuitry may have operated if either of the following conditions are noticed:
* No sound is heard when the power is turned on.
* Sound stops during a performance.
 The function of this circuitry is to prevent circuitry damage if, for example, the positive and negative speaker connection wires are “shorted”, or if speaker systems with an impedance less than the indicated rated impedance of the amplifier are used.
If this occurs, follow the procedure outlines below:
1. Turn off the power.
2. Determine the cause of the problem and correct it.
3. Turn on the power once again after one minute.

 This product utilizes a laser diode with the unit turned “ON”, invisible laser radiation is emitted from the pickup lens.
Wavelength: 790 nm (CD)
Maximum output radiation power from pickup: 100 PW/VDE
Laser radiation from the pickup unit is safety level, but be sure the followings:
1. Do not disassemble the pickup unit, since radiation from exposed laser diode is dangerous.
2. Do not adjust the variable resistor on the pickup unit. It was already adjusted.
3. Do not look at the focus lens using optical instruments like convex lens or similar oblects.
4. Recommend not to look at pickup lens for a long time.

 The lead free solder has been used in the mounting process of all electrical components on the printed circuit boards used for this equipment in considering the globally environmental conservation.
The normal solder is the alloy of tin (Sn) and lead (Pb). On the other hand, the lead free solder is the alloy mainly consists of tin (Sn), 96.5%, silver (Ag) 3.0%, Copper (Cu) 0.5%, Cobalt (Co) / Germanium (Ge) 0.1 to 0.3%  Use the soldering iron (more than 70W) equipped with the temperature control after setting the temperature at 350±30 degrees C (662±86qF).

This model uses CD Mechanism Unit (BRS11C).

Micro-processor IC, IC2003 (MN101EF16KXW)

This model uses Speaker System, SB-AKX54, SB-WAKX74LM-K.

Service Mode

Cold-Start
Here is the procedure to carry out cold-start or initialize to shipping mode.
1. Unplug AC power cord
2. Press & hold [POWER] button
3. Plug AC power cord while [POWER] button being pressed
FL Display will show “ -------------“
4. Release [POWER] button.

DOCTOR MODE



Self-Diagnostic Mode & Self-Diagnostic Error Code Table
Self-Diagnostic Function  provides information on any problems occurring for the unit and its respective components by displaying the error codes. These error code such as U**, H** and F** are stored in memory and held unless it is cleared.
The error code is automatically display after entering into self-diagnostic mode.

Power Supply Error Codes 

CD Mechanism Error Code Table (CD Mechanism Unit (BRS11C)

Sales Demonstration Lock Function
Entering into sales Demo Mode
Here is the procedures to enter into Sales Demonstration Lock.
Step 1: Turn on the unit.
Step 2: Select to any mode function.
Step 3: Press [ Eject OPEN/CLOSE] key then [ Play/Pause] key at the same time, press and hold both [ Eject OPEN/CLOSE] and [Play/Pause ] keys for 5 sec.
Step 4: The display will show upon entering into this mode for 2 sec..

Note: [Eject OPEN/CLOSE] button is invalid and the main unit displays “LOCKED” while the lock function mode is entered.

Cancellation
Step 1: Turn on the unit.
Step 2: Select to any mode function.
Step 3: Press [ Eject OPEN/CLOSE] key then [Play/Pause ] key at the same time, press and hold both [ Eject OPEN/CLOSE] and [Play/Pause] keys for 5 sec.
Step 4: The display will show upon entering into this mode for 2 sec.

Common faults and defective resistors positions

Main PCB

D-Amp PCB

D-Amp circuit diagram (Schematic)


Panel schematic


Sub-woofer circuit diagram

SMPS (Power Board schematic)





Wednesday, September 22, 2021

Philips 32PHT4002-40 – how to enter the factory mode, how to update the software, Alignments, how to select the panel code, SMPS (Power supply) Schematic

 

Factory Mode
Press the following key sequence on a standard RC transmitter: “1999” directly followed by MENU

Alignments

Software Upgrading and Panel Code
Software Upgrading
Operations and procedure of software upgrading:
1). Changed the file name to "MERGE.bin", then stored software in the FAT32 format blank U disk.
2). Insert USB flash disk into the USB upgrade port, upgrade the software according to the following the operating instructions:
Select AIR or DTV signal source, press Menu key to pop up the main menu, then choose.

Select CHANNEL, press right key or OK key to enter.

Select Software Update(USB), press right key or OK key to enter.

Software update menu will pop up when press confirm key, then select “Yes” to confirm:

The process of software updating:

Method 2:  Keep pressing VOL+ and CH+ keys on the machine panel, power on the machine, the standby light flashes quickly after about 5 seconds, standby light extinguish and turn into lighting after about a minute, means that the upgrade is completed.
Notice
* When the machine Upgrading (U disk light flash), do not remove U disk or switch off the power, otherwise it will
destroy the software and lead can not upgrade.
* The machine must be power off when inserted or pulled out U disk, to avoid U disk or damage the machine.

Connections overview

Panel Code
Press the following key sequence on a standard RC transmitter: “1999” directly followed by MENU, can see the panel type information from factory menu, see the Panel PN from the configuration table

CTN_ALT BOM#

Panel Type

Panel PN

32PHT4002/40

K320WD92-KA240B2

7422-320HKK-335B9021-

Power Supply Unit (SMPS)
All power supplies are a black box for Service. When defective, a new board must be ordered and the defective one must be returned, unless the main fuse of the board is broken. Always replace a defective fuse with one with the correct specifications! This part is available in the regular market.
Consult the Philips Service web portal for the order codes of the boards.
Important delta’s with the platform are:
* New power architecture for LED backlight
* “Boost”-signal is now a PWM-signal + continuous variable
The control signals are:
* PS-ON
* Lamp “on/off”
*DIM (PWM) (not for PSDL)
 No detailed information is available because of design protection issues.
* +12 output (on-mode)
* +12V_audio (audio AMP power)
* Output to the display; in case of
- IPB: High voltage to the LCD panel
- PSL and PSLS (LED-driver outputs)
- PSDL (high frequent) AC-current.
Diversity
The diversity in power supply units is mainly determined by the diversity in displays.
The following displays can be distinguished:
* CCFL/EEFL backlight: power panel is conventional IPB
* LED backlight:
- side-view LED without scanning: PSL power panel
- side-view LED with scanning: PSLS power panel
- direct-view LED without 2D-dimming: PSL power panel

- direct-view LED with 2D-dimming: PSDL power panel.
PSL stands for Power Supply with integrated LED-drivers.
PSLS stands for a Power Supply with integrated LED-drivers with added Scanning functionality (added microcontroller).
PSDL stands for a Power Supply for Direct-view LED backlight with 2D-dimming.

DC to DC Converters
The on-board DC/DC converters deliver the following voltages(depending on set execution):
* +5V-SB, permanent voltage for the Stand-by Power system
* +3V3-STANDBY,voltage for IR/Key board
* +12V, input from the power supply for the panel common(active mode)
* +3V3-EMMC, +V-EMMC-IO, voltage for EMMC when TV on
* +1V5-DDR, +VREF-A2-DQ,, +VREF-A2-CA, voltage for DDR
* TUNER_3V3, supply voltage for tuner
* +5V-SW, input intermediate supply voltage for USB Power
* +12V-AUDIO1 for the AUDIO AMP
* +3.3VA_T2, +1.2V_T2 voltage for Demodulator IC channel decoder.

Power layout SSB

Video and Audio Processing - MSD3463
The MSD3463 is the main audio and video processor (or System-on-Chip) for this platform. It has the following features:
1. Worldwide multi-standard analog TV demodulator
2.PAL/SECAM/DVB-T/DVB-T2 /DVB-C demodulators
3.1920*1080@60Hz direct drive
4. Powerful CPU core
5. A transport de-multiplexer
7. A muti-standard video decoder
8. Rich format audio codec
10. HDMI1.4 receiver
11. MHL input
12. 2D converter
14. PWM dimming (LED backlight)
15. Two-link LVDS,
1 OVERVIEW
The MediaTek MSD3463family consists of a DTV front-end demodulator, a backend decoder and a TV controller and offers high integration for advanced applications. It integrates a transport de-multiplexer, a high definition video decoder, an audio decoder, a -link
LVDS transmitter, and a NTSC/PAL/SECAM TV decoder .The MSD3463 enables consumer electronics manufacturers to build high quality, low cost and feature-rich DTV.
World-Leading Audio/Video Technology: The MSD3463 supports Full MPEG2/4/H.264 video decoder standards, and JPEG. The MSD3463 also supports MediaTek MDDiTM de-interlace solution which can reach very smooth picture quality for motions.
The special color processing technology provides a natural, deep colors and true studio quality video. Moreover, theMSD3463 family has built-in high resolution and high-quality audio codec.
Rich Features for High Value Products: The MSD3463 family enables true single-chip experience. It integrates high-quality HDMI1.4, high speed VGA ADC, a-link LVDS, USB2.0 receiver , and ATSC/DVB-T/DVBC/DTMB/ISDB-T demodulators.
All New FHD@60Hz Experience: The MSD346 family provides consumers with FHD 60Hz direct drive.
WW Common Platform Capability: The MSD3463 family supports ATSC, DVB-T, DVB-C, and ISDB-T demodulation functions. It
reserves transport stream inputs for external demodulators for other countries or areas. TV maker can easily port the same UI to worldwide TV models. First-class adjacent and co-channel rejection capability grants excellent reception. Professional error- oncealment provides stable, smooth and mosaic-free video quality.

Power supply schematic diagram


Wednesday, September 08, 2021

Philips FWM583 Mini System circuit diagram and adjustments

 

  Always respect voltages. It makes sense to avoid exposure to electrical shock.  While some sources are expected to have a possible dangerous impact, others of quite high potential are of limited current and are sometimes held in less regard.

AMPLIFIER-RMS output power
LF channel - 105 W per channel
HF channel - 105 W per channel
Total Bi-Amp power - 420 W

FAST LENS CLEANING (dry brush)

Use lens cleaning CD
SBC AC300 - 9082 100 00043

Insert the lens cleaning CD, press PLAY and follow the voice guide´s instructions on the CD.

Before touching the lens it is advised to clean the surface of the lens by blowing clean air over it.
This to avoid that little particles make scratches on the lens.

Because the material of the lens is synthetic and coated with a special anti-reflectivity layer, cleaning must be done with a non-aggressive cleaning fluid. It is advised to use “Cleaning Solvent B4-No2”, available with code number 4822 389 10026.
The actuator is a very precise mechanical component and may not be damaged in order to guarantee its full function.
Clean the lens gently (don’t press too hard) with a soft and clean cotton bud moistened with the special lens cleaner.
The direction of cleaning must be in the way as indicated in the picture below.



Eye-pattern signal – jitter measurement
Measure the signal on the input of the Signal processor using an analogue oscilloscope.

See below examples of the signal. Amplitude should read at least 700mVpp using SBC444A.

If the oscilloscope shows a signal like the ‘bad’ one, and/or the amplitude decreases within 1 minute - the CD drive has to be replaced.


CD drive – offset measurement
The photodiodes of the CD-drive may have an offset. These offsets have to be compensated by the signal processor.
High offsets can lead to poor playability of some CDs (skipping tracks).
To measure the offset values, start the Service Test Program - section “Focus Test” without a CD.
The offsets can be measured with a DC Millivoltmeter directly on the connector (see drawing below). Pin numbering varies from drive to drive.  If one of the offsets is higher than ±10mV the CD drive has to be replaced. Otherwise replace the Signal Processor


Circuit diagram of the front board


Tuner board circuit diagram


Circuit diagram of CD board



Circuit diagram of high amp and power board


Source selection and sound processing circuit diagram



Saturday, August 28, 2021

Kalley KLED24HDT2 NTSC-M, PAL, DVB-T12 – how to enter the service mode, service alignments, audio amplifier and SMPS schematic, software update

 

Always respect voltages. While some may not be dangerous in themselves, they can cause unexpected reactions that are best avoided. Before reaching into a powered TV set, it is best to test the high voltage insulation. It is easy to do, and is a good service precaution.

When replacement parts are required, be sure the service technician has used replacement parts specified by the manufacturer that have the same characteristics as the original part. Unauthorized substitutions may result in fire, electric shock, or other hazards.

Alignment Procedure: MODELS - MS306-MS306B-MS306C-MS306D-MS306G-MS306P-MS306BP-MS306CP-MS306DP

How to enter the service mode

MS306 series chassis is designed for Asia Pacific-South America market. Both Full HD panel and HD panel can be compatible. The signal sources includeTV,AV,YPBPR or YCBCR,VGA,HDMI and USB. For YPBPR,HDMI source ,Format up to 1080p can be supported; USB support image, audio and video(up to H.264)playing; The whole process of alignment includes ADC calibration and White Balance adjustments.
Factory Menu
Methods of Entering
Method 1
Using the remote ,enter the “Picture” submenu in the OSD; choosing the “contrast” item and press the 9,7,3 and 5 in series,
Factory Menu will appear in the left top of screen
Method 2
Press RETURN button when FACTORY HOTKEY is enabled(ON).
General introduction

FACTORY MENU



Below the factory menu, some model information are showed, including software version, Project Name, SIACP Version, and SW release time.


The first step is to adjust HDMI.

Design Menu
Methods of Entering

Method 1 - Using the remote, enter the

“Picture” submenu in the OSD;

choosing the

“contrast” item and press the 1,9,5,and 0 in series

Design Menu will appear in the left top of screen.
Method 2: Press RETURN button when DESIGN HOTKEY is enabled (ON).
General introduction
DESIGN MENU



Service Menu
Methods of Entering
Using the remote, enter the “Picture” submenu in the OSD; choosing the “contrast” item and press the
9,7,0 and 5 in series, Service Menu will appear in the left top of screen
SERVICE MENU


Debugging
General Steps of debugging
According to the requirement of the order, below steps are needed for appropriate setting.
1) Enter the Factory Menu, enable FAC HOTKEY.
2) Check Project ID and the version of software, release date displayed at the bottom of Factory Menu.
3) Enter Design Menu, choose SERVICE MENU->Project ID, choose corresponding Project ID number of the product.

4) Return to Factory Menu, check the Product model.
5) Choose Factory Menu->NVM RESET and press the right button of the remote and wait until prompt OK appears.
6) Restart the set
7) According to the requirement of the order, Set the items of SHOP INIT and Hotel Menu etc.
8) After aging under normal temperature, calibrate ADC and adjust white balance.
9) Choose Factory Menu ->SHOP and press the button of remote to initialize the set.
Note: After step 9, Hotel Menu will be disabled by default. Therefore, if the order requires hotel function, it is necessary to enable hotel function by set Design MENU->Service Menu->HOTEL ENABLE to ON.
Equipments
·Color Analyzer CA-210.
·Video Pattern Generator Chroma2329.
·Color TV Pattern Generator PM5418/Fluke5418.
·VGA cable , AV(RCA) cable ,YPBPB (RCA) cable, HDMI cable etc.

ADC Calibration
 Signal and generator
PC: Chroma2329 Pattern 42,Timing 14(1024X768@60Hz 5 MOSAIC) YPBPR: Chroma2329 pattern 103, Timing 79(100% Color Bar,720p)

Steps of Calibration
1). Access to the Factory menu->ADC

2). select RGB source and see the 5 MOSAIC appear on the screen
3). Select AUTO ADC , Press the right button on the your remote to calibrate the ADC automatically.
4). Select YPBPR source and Repeat step 5.3 .
When the OK appears the calibration has been finished successfully.



White Balance adjustments (Manual)
Before adjustment ,you must make sure the ADC status(only PC and YPbPr) is “success “and Color Analyzer has been calibrated .Only AV1,YPbPr,PC,HDMI1 need to be adjusted. HDMI1 should be the first.

Signal and generator
The pattern of the signal should be used are White (Chroma2329 pattern 113) and Grey (pattern 114).
The format of signal are respectively 720P for HDMI1 (Chroma2329
Timing 69),PAL (Chroma2329 Timing38) for AV1,1024X768@60Hz(Chroma2329
Timing14) for VGA and 720P(Chroma2329 Timing79) for YPbPr.
Steps of adjustment
1).Enter the factory menu-> White Balance, select source HDMI 1 and Normal Temperature.
2).Input grey signal in 720p format.
3).Change R-OFFSET and B-OFFSET to make sure the value of color coordination equal to (X=0.280 +or-0.015;Y=0.290 +or-0.015).
4).Input white signal in 720p format.
5). Change R-GAIN and B-GAIN to make sure the value of color coordination equal to (X=0.280 +or-0.015;Y=0.290 +or-0.015).

6).Repeat step 2—5 until both of the value of color coordination of white and grey equal to (X=0.280 +or-0.015;Y=0.290 +or-0.015).
For COOL and WARM color temperature, just repeat step 2—5.The color coordination we recommend for COOL and WARM color temperature is respectively(X=0.270 +or-0.015;Y=0.270 +or-0.015) and (X=0.300 +or-0.015;Y=0.305 +or-0.015).
After the adjustment of HDMI1, you can switch to other source AV, PC and YPbPr and repeat step 1—6 to do the WB adjustment.
Note: For some small size LED panel,the color coordination of specifications is not X=0.280, Y=0.290,and we recommend you adopt the values from panel specifications.
ADC Calibration and White Balance Adjustment (automatic)
The process of adjusting ADC and White Balance automatically is out of the range of this file, Please refer to the relevant technical file of HuiZhou factory of TCL.
6.Chip list of software programming before SMT


Software update
Method of SW update:
1
.Download the bin file to the root directory of your USB device (Do not change the file name); Then insert the USB device to USB interface of TV set.
MS306 Series with its upgrade file corresponding relation as the table below show:


Upgrading method 1
1.using the remote, enter the “Picture” submenu of the OSD; choosing the “contrast” item and press 9,7,3 and 5 in series,
Factory Menu will appear in the left top of screen.
2, Select the “USB UPDATE” item , press left or right key to enter the update box;


3, Select “YES” of the dialog box and press OK button to start the update, you will see a progress box on the screen.
4, After updating , the set will reset automatically.
Upgrading method 2
1
.Press the “MEUN”button of Remote Control, then select the software update (U..> item in Option sub-menu, press the left of right key to enter the update box.

2.Press left button Select “YES” of the dialog box and to start the update, you will see a progress box on the screen.

3. After updating , the set will reset automatically.


Project ID selecting
1) Press the Menu button of remote control, then select Contrast item of Picture submenu;
press 1,9,5,0 consecutively, there you go the Design Menu.
2) Select the SERVICE MENU item, press OK and RIGHT button of the remote to enter submenu,
3) Select the PROJECT ID item, press OK or RIGHT button of the remote to enter the submenu;
4) Press the right or left button of the remote to select the ID you want;
5) After ID selection, press MENU button of the remote to exit DESIGN MENU.
6) Finally, do AC power on/off.

Audio amplifier schematic

Power supply [SMPS] and LED driver schematic




Friday, August 20, 2021

How to enter service mode of Pioneer AV receiver VSX1130, VSX930, VSX90 – service adjustments, network confirmation, software update, system reset, error information and more

 

Pioneer AV Receiver VSX-1130-K, VSX-930-K, VSX-930-S, VSX-90 – using  STR2A153 as SMPS control

Paste a square of acetate tape 10 × 10 mm in size onto the upper left corner of the AXX7293 shield.
Be careful NOT to conceal the MAC address printed on the shield with the acetate tape.
Be sure to paste on the acetate tape after module replacement. (Only for the European models)



Cable dressing


Contrast of PCB assemblies


PCB locations


Confirmation of the network module

Procedures:
Check if the set SSID of this unit is displayed on a device such as a PC or a smart phone, following the procedures shown below.
If the SSID is displayed on the device, the antenna connections of the Network module are normal.
If the SSID is not displayed, check the antenna cable connections on the network module.

1 Press "Home Menu" button on a remote control and select "Network Connection" from the Network, Bluetooth menu on screen.

2 Select "Wireless Direct" from the Network Connection menu.

3 Select the encryption method to "None" from Security Protocol.

4 Select "Frequency Band" at DN and select the frequency to "2.4GHz".
5 Select "OK" then press ENTER. "Setting change?" window is displayed, then select "YES" and press ENTER.

6 Select the SSID shown on the screen of this receiver.
(e.g. WirelessDirectX: XXXXXX)


How to Check on a PC Equipped with a Wireless LAN Device

Windows 7

1 Left-click on the wireless network icon on the system tray.

2 Check that the above-mentioned SSID
(WirelessDirectX:XXXXXX) is displayed on the list that appears.

How to Check on a Smartphone (Example: iPod Touch)

1 At the top screen of an iPod Touch, select Settings.

2 Select Wi-Fi.

3 Check that the above-mentioned SSID
(WirelessDirectX:XXXXXX) is displayed in the "Choose a Network" box.


Error Indications When an Abnormality in The Amplifier System is detected and How to Enter Release Mode

During Standby mode, simultaneously press and hold the "TUNE ↓" and "MULTI-ZONE ON/OFF" keys for 5 seconds.


Service mode: How to enter?

During Standby mode, simultaneously press and hold “MULTI-ZONE ON/OFF” and “ENTER” keys for 5 seconds to enter this mode. Turn off the power to this unit by setting the main volume level to “---dB” and Multi-zone to “OFF”.

How to exit

Turning off the power or pressing the RETURN key returns to the normal mode.



How to reset the system

Resetting the system to the factory default settings
Use this procedure to reset all the receiver’s settings to the factory default. Use the front panel controls to do this.
Set MULTI-ZONE to MULTI ZONE OFF.
• Disconnect the iPod and USB memory device from the receiver beforehand.
• Set the Control with HDMI to OFF.
1 Switch the receiver into standby.
2 While holding down ENTER on the front panel, press  STANDBY/ON.
The display shows RESET <NO>..
3 Select ‘RESET’ using PRESET
ç / è then press ENTER on the front panel.
The display shows RESET? OK.
4 Press ENTER to confirm.
OK appears in the display to indicate that the receiver has been reset to the factory default settings.
• Note that all settings will be saved, even if the receiver is unplugged.


Dressing the antenna cables


Setting and adjustment

If the adjustment is shifted or if it becomes necessary to readjust because of part replacement, etc., perform the adjustment as described below.
• Any value changed in Adjustment mode will be stored in memory as soon as it is changed. Before readjustment, take note of the original values for reference in case you need to restore the original settings.
• Use a stable AC power supply.

Adjustment required when the unit is repaired or replaced


USB backup and Updating the Firmware

USB backup

This model is capable of saving the set values stored in the MAIN Ucom of DMAIN Assy in the USB and loading them in a new DMAIN Assy. (Note that MAIN Ucom should normally operate to enable this function.)
When replacing DMAIN Assy, execute the above mentioned processes


Requirements for USB memory
USB memory to be used should meet the following requirements.
• Compatible with USB Mass storage Class
• With a file system of FAT (FAT32)
File saving format
Files are to be saved in the following format:
Example: VSX-1130_BK01.avr
How to save in the USB memory from AV amplifier
1. Insert the usable USB memory into the USB terminal when the main device is off.
2. Enter the SERVICE MODE and select [USB BAK c HOLD d] with g keys.  [See  TEST MODE] for how to enter the SERVICE MODE.)
3. Select [USB BAK c SAVE? d ] with h keys and press [ENTER].
Note: The system cannot execute SAVE, LOAD until start is completed of Network module.
4. Saving in the USB starts and the main device automatically goes off after the normal completion ([COMPLETE] is displayed.).
5. Remove the USB and saving is finished.
*1. If the following errors occur after "SAVE" is executed, error message will be displayed and "SAVE" will be stopped and the power will be turned off.
• Ejecting of USB device
• Short capacity of USB device
• Error during writing in the USB device (Read Only or defective Sector, etc.)
*2. If the same file name exists in the USB, overwriting will be automatically executed.
How to write into AV amplifier from the USB memory
1. Insert the USB with the saved file into the USB terminal when the main device is off.
2. Enter the TEST MODE and select [USB BAK c HOLD d] with g keys.
[See TEST MODE] for how to enter the TEST MODE.)
3. Select [USB BAK c LOAD? d ] with h keys and press [ENTER].
4. Saving in the main device starts and it automatically goes off after the normal completion ([COMPLETE] is displayed.).
5. Remove the USB and loading is finished.
* If the following errors occur after "LOAD" is executed, error message will be displayed and "LOAD" will be stopped and the power will be turned off.
• No setting file
• Mismatching between the setting file and the specification of the A/V RECEIVER type to be loaded back
• Error due to Checksum, Signature Check, and Size Check
• Ejecting of USB device (during reading of the setting file)
Precautions
• Files are stored in Root of USB memory.
• Files are read from Root of USB memory.
To make operations such as moving files, be sure to assign the saved file in Root of the USB memory.
Also please be careful not to assign *.avr in multiple numbers.
• The time and date of updating for saved file is fixed to "2006/03/08 20:01."
• In principle, please implement Load without making of factory default settings.
• Depending on the type of USB memory device, the setting file may not have properly been saved even though [COMPLETE] is displayed after a SAVE process.
Before replacing the DMAIN Assy, perform a LOAD process and check that [COMPLETE] is displayed.

UPDATING OF THE FIRMWARE

Workflow


MAIN com, SUB com (EVENT), DSP Flash ROM and Network module Update by USB Memory and the Confirmation of the Version

UPDATE PANEL Mode (Version update)

Copy the UPDATE FILE to the root directory of the USB Memory.
Note: NEVER copy several UPDATE FILES to the root directory of the USB Memory.
Copy only the corresponding UPDATE FILE.
Enter the UPDATE PANEL mode.
Check a current version.
2. Turn off the power to this unit by setting Multi-Zone to "OFF".
3. Connect the USB Memory to the USB terminal (A type) of the front panel.
1. While holding down
"TUNE" key on the front panel, press "STANDBY ON/OFF" key and moves to the UPDATE PANEL mode.
2. The updating process is as follows.


Update time is fluctuated by contents of the update. It will take about 26 minutes at the maximum.
(Actual time is from 3 minutes to 26 minutes.)
Time required for updating varies, because only the programs that require updating will be updated.

Confirmation
Enter UPDATE PANEL mode and check that the programs have been updated.

Idle current adjustment

When any component parts which are within the red square on the following circuit diagram are replaced, the idle current adjustment of that channel is required. (Idle current adjustment for another channel is not required.)
However, when any capacitors are replaced, the adjustment is not required.
(The following circuit diagram is for SL channel, but another channel also has same circuit diagram and same adjustment is required)