CrownXTi_Series_Service_Manual_original电路图.pdf

《CrownXTi_Series_Service_Manual_original电路图.pdf》由会员分享，可在线阅读，更多相关《CrownXTi_Series_Service_Manual_original电路图.pdf（167页珍藏版）》请在收音机爱好者资料库上搜索。

1、 Service Manual XTi Series RadioFans.CN 收音机爱 好者资料库 Table of Contents Section 1.Digital systems Overview 1.1.Amplifier Operation 1.2.Power Supply Operation 1.3.Tracker Supply Operation Section 2.Assembly Drawings 2.1.XTi1000 PWA BOM 139087-14 2.2.XTi1000 Schematic 139087-14 2.3.XTi2000 PWA BOM 139086

2、-14 2.4.XTi2000 Schematic 139086-14 2.5.XTi4000 PWA BOM 138349-14 2.6.XTi4000 Schematic 138349-14 Section 3.Firmware Notes Section 4.Tech Notes RadioFans.CN 收音机爱 好者资料库 CEquel Digital Systems Overview RadioFans.CN 收音机爱 好者资料库 CEquel Digital Systems Overview Page 2 of 16 CEquel Digital Systems Overview

3、 Page 3 of 16 Modes of Operation The CEquel microprocessor, LPC2142 can function in several different modes of operation. This document will describe what those modes are, how to get to them and how to use them. The Modes are listed below along with a brief description. Mode Name Description Normal

4、Normal Operating Mode, default Board Level Test Factory Only, part of functional test, (No line voltage present) Chassis Level Test (Self Test) Quick factory test (part of light zap) Chassis Diagnostic Test (Amp Indo Diagnostics) More detailed information about the current amp operation Bootloader M

5、ode Used to reprogram the microcontroller flash memory Front Panel Lockout Disables the front panel push buttons for security. Can be entered from front panel buttons or software. Normal Mode: This is the default mode of operation. The heartbeat LED (E1) should be beating at about 1Hz (500ms on, 500

6、ms off). Board Level Test Mode: Entered by pulling TP1 low at power up. Exit by pulling TP1 high. Operation Turn all front panel LEDs ON Turn all LCD segments ON Set the fan PWM to maximum Set the Soft_start relay OFF (assumes no line voltage is present). Only used by MFT Chassis Level Test Mode (Se

7、lf Test): Entered by powering up the unit with the PREV button pressed. Exit by successfully pressing all three buttons Operation Turn all front panel LEDs ON Turn all LCD icons ON and display “PRESS ME” Set the fan PWM to maximum Button Check Display which menu button is pressed. After exiting this

8、 mode, the main program should go get valid LM75 temperature readings and update the fan speed. If the amp is cool, it should turn the fan off CEquel Digital Systems Overview Page 4 of 16 Chassis Diagnostic Test Mode (Amp Info Diagnostics): NOTE: This mode is available to all users. Entered by press

9、ing all three front panel buttons for 3 seconds. Exit by successfully pressing SEL at any time. IMPORTANT!: When you are in the “AMP INFO” screens, the firmware is NOT running thru all of the normal routines. Clip check is called, but not as fast as normally, you will see more clipping. The thermal

10、limiter and fan should work just fine. The heartbeat LED and front panel LEDs will not update. The clip limiter and governor are also not running. Operation Display the present Power Supply measured temperature in degrees C Display the present Ch1 measured temperature in degrees C Display the presen

11、t Ch2 measured temperature in degrees C Display the present Firmware rev level (read from serial flash) Bootloader Mode: Entered by pulling TP17 low during power up. Exit by cycling the power. Operation Used to download new firmware to the LPC2142. It copies an internal boot-loader from flash to RAM

12、, where it executes. It erases the on-chip flash, and reprograms it. See the Programming document for more details. It is impossible to corrupt this boot-loader. It resides at a special location in internal Flash that is not accessible to anything. This should ALWAYS work! Front Panel Lockout: Enter

13、ed by holding UP and DOWN buttons down simultaneously. Exit by holding UP and DOWN buttons down simultaneously. Operation After holding down the up and down buttons for about 3 seconds, the LCD will display “LOCKED”, this indicates the amp is now in lockout mode. If any button is pressed, no action

14、will be taken, except to display the “LOCKED” message. IF you continue to hold the buttons down they will simply toggle the lockout mode on and off. Special Note: The front panel lockout mode can also be entered from the software. In this case, the software will supersede the front panel. So, holdin

15、g down the up and down buttons will NOT disable front panel lockout mode. When enabled from software, it can ONLY be disabled from software. This operation is consistent with the ITech. CEquel Digital Systems Overview Page 5 of 16 rmware CEquel Digital Systems Overview Page 6 of 16 CEquel Digital Sy

16、stems Overview Page 7 of 16 Updating Firmware RS-232 Method Part 1. If the microcontroller (U1, LPC2142) has NEVER been programmed before Connect the Serial 4-pin header to J2. IMPORTANT! The header MUST be connected with the correct polarity or fatal damage can result. Pin 1 on the header should be

17、 connected to pin 1 of the connector. See figure below: To program a new device connect the header to J2 and apply power. TP17 does NOT have to be pulled low because the micro does not have a valid program to run and will therefore automatically enter bootloader mode. Open up the Philips Flash Utili

18、ty Program (version 2.2.2) Under Flash Programming, make sure the correct file is selected to download. Select the Device (LPC2142), Select the XTAL Freq. (kHz): 16000 Select the Erase Entire Device button Select the correct file to load: (currently XTI_LPC_01_00_08b.hex) Press the Read Device ID bu

19、tton. The Part ID and Bootloader ID will show up. If they do not and this operation times out, then most likely, the device is not in bootloader mode, there is something wrong in the configuration or setup or the cable is not correctly connected. If the device is not in bootloader mode proceed to Pa

20、rt 2. Select Upload to Flash and the programming will start. After it is finished you may select Compare Flash. This will read back the flash memory and compare it to what was just programmed (Pass/Fail) Cycle the Power to the amp and close the Flash Utility Program. Xti Amp (back) (front) J2 : FRON

21、T Serial Interface board PC RS-232 CEquel Digital Systems Overview Page 8 of 16 Part 2. If the microcontroller (U1, LPC2142) has been previously programmed. To reprogram a device, it is first necessary to put it in bootloader mode. This is done by shorting TP17 to ground during a power up. After the

22、 unit powers up, the ground can be removed or left connected, doesnt matter. (Hint: Use a test lead connected to TP5(GND) on one end and TP17 on the other). The LCD should be blank. Again follow the steps in Part 1 to connect the Serial interface board to J2 and open the Philips Flash Utility. Press

23、 the Read Device ID button. The Part ID and Boot Loader ID should be displayed. Again follow the steps in Part 1 to send new firmware. If this does not work, there is most likely a hardware problem, check for shorts, correct power, bridges, other hardware problem. To verify serial flash and check th

24、e current firmware version number At any time hold down all three front panel buttons for at least 3 seconds. This puts the amplifier into a diagnostic mode. NOTE: While in this mode the front panel LEDs will NOT be updated. Also, the governor is disabled. Use the Next and Prev buttons to scroll thr

25、u the displays. They are outlined below: Screen 1: Power Supply Temperature Sensor Read out in degrees C Screen 2: Ch1 Temperature Sensor Read out in degrees C Screen 3: Ch2 Temperature Sensor Read out in degrees C Screen 4: Firmware version number read back from Serial Flash (eg. 1. 1. 0.15) NOTE:

26、The temperatures displayed are the raw unprocessed readings. They are updated approximately every 600ms and should be accurate. LCD display looks to be corrupted. If the text on the LCD looks to be bogus, it most likely is because the serial flash is blank or corrupt or is out of sync with the micro

27、controller program. This problem can be resolved by updating the firmware via USB. This method ensures that both the serial flash and microcontroller are reprogrammed. CEquel Digital Systems Overview Page 9 of 16 Programming the microcontroller (U1) and serial flash (U15) via USB ? Connect the ampli

28、fier to a PC via USB. ? Open up the CLoader Utility 2.10 or newer ? If fw is older than 1.0.22.0 send .hex file. Otherwise, send .s file How to Use the CLoader Utility Instructions: Simply run this utility with an amplifier connected to USB, it should show up in the dialog window. If it does not, un

29、plug the USB cable, cycle power on the amp, plug in the USB cable again and try again. If amplifier still does not show up, verify that the D+ USB data line is pulled high thru R19. With the USB cable unplugged, use a meter to measure R19, it should be pulled up to +3.3V thru Q23. Pulling this line

30、high tells the USB host that the device is ready for communications. After the amp shows up in the window, select Load File and select the firmware file to be downloaded. Wait for amp to reboot and download successful display. * To run from a command line * Simply type the name of the utility space

31、and the name of the file to be loaded. When run from a command line, it creates a file named LdrError.txt. There is a number inside this file as follows: 0 - Success 1 - Amplifier not found 2 - File invalid or not found 3 - USB communications error 4 - Abort Button pressed The loader terminates upon

32、 encountering an error, or when successfully programming the amplifier. The error file is blown away if found when the loader starts, and is written just before it terminates. It helps to have the utility and firmware file in the same directory and with no spaces in the folder names. If there are sp

33、aces, use around the path name. CEquel Digital Systems Overview Page 10 of 16 * Revision History * Version 1.03 Supports command line calls. Writes error log. displays message when finished Version 1.04 Added the word Delay in the title bar, so there is no confusion about the version to use. The tex

34、t also indicates that its finalizing before it puts up that programming has completed successfully after the 5 second delay. The Amplifier is almost through its rebooting process at this point, but its probably safe to shut down. Version 1.06 When it is done uploading firmware, if the amplifier does

35、 not already have a serial number it generates one using the Windows API function and sends it to the amplifier. If the Amplifier already has a serial number, it reports that back as well. Version 1.07 Fixes bug with USB version number if 1.000. Supports both .bin and .hex file downloads. NOTE: This

36、 loader only works with .hex files. DO NOT try to load .bnd or bin files with this utility. Version 2.10 Supports both .hex and binary .s file downloads. The hex file is required for updating amps with older firmware 1.0.22.0 and older. The serial number check and programming is done much quicker in

37、 this version as well. This version will not allow you to download a hex file to an amp with program version number 1.0.22 or later. Where do I find all this stuff? -The place to look for production released firmware is the ProductionProgrammingFiles folder. This is where we store the released versi

38、on of firmware for all products. It can also usually be found in the forums section of the Crown web site () -The next place to look would be my share drive. I usually keep beta firmware and different versions of the CLoader Utility there. /butler/ShareNew/CEquel_Files - If you wish to run the Syste

39、m Architect Software application to monitor/control the devices, that can be found either on my share drive or the HiQnet web site. The web site will only provide “Released” versions of the software while my share most likely will have a beta version (read as “buggy, use Beta at your own risk!, oper

40、ation NOT guaranteed”). CEquel Digital Systems Overview Page 11 of 16 Quick explanation of firmware update operation (Bootloaders) There are two sources of non-volatile flash on the CEquel amps. 1. 64kBytes of on-chip flash on U1 the microcontroller. (Program) 2. 2M-bits (256 kBytes) of serial flash

41、 U15. (Program and Data Memory) When firmware is loaded via RS-232, it uses a very low level bootloader on the microcontroller and only the on-chip flash is reprogrammed. The serial flash is not changed. When firmware is loaded via USB, it uses a high level bootloader written by me and it runs in RA

42、M. It follows this sequence of events. 1. Start receiving the firmware download packets via USB 2. After 256-bytes (1-page) have been received, program that page in serial flash. 3. After the serial flash has been completely reprogrammed, the download is finished 4. Set the reboot flag in serial fla

43、sh. 5. Load the bootloader from on-chip flash to RAM and jump to it. 6. Erase the entire on-chip flash 7. Program the on-chip flash with the data stored in Sector 3 of serial flash 8. When finished clear the reboot flag and go to an infinite loop and wait for the watchdog to time out and reboot. You

44、 can see the the most critical steps are 5 and 6. This is the only place you can really screw things up. If something goes wrong in steps 5 or 6 and they can not complete, you will have to reprogram the micro using the RS-232 method. Notice in step 4 a reboot flag is set, this was implemented becaus

45、e the current firmware update utility in System Architect can NOT guarantee a reboot command will be sent and thus a complete firmware update. The reboot flag is only cleared after the micro on-chip flash has been successfully reprogrammed. This flag is checked at every power up. If it is set, the b

46、ootloader will be called. If a USB download is interrupted, it should not cause any fatal problems. I will simply leave the serial flash in some undefined state. The micro should boot-up normally. However, the DSP program and parameter can be corrupted causing serious problems (although most likely

47、it will not pass audio). Also the LCD will most likely appear to look corrupted, because any LCD segment can be on or off given bogus data in serial flash. Most importantly, the micro should run and another USB firmware download can be attempted. CEquel Digital Systems Overview Page 12 of 16 Serial

48、Flash Memory Map (M45PE20) CEquel Digital Systems Overview Page 13 of 16 Protection Features ? Thermal Limiter The thermal limiter should have the following profile. The limiter threshold should be ramped down very smooth and slow to -24dB (0.25 dB/sec). The release from -24dB to 0 should also be very smooth and slow (0.125 dB/sec). The jump to -36dB and -42dB will be