Service Manual for Cisco Catalyst 3750G - Page 1
Forum section: electronics / projects

author: asp
author_rank: Regular Contributor
timestamp: January 29, 2014, 11:59:46 pm
content: Hi guysI tried all around the internet to find a service manual for a Cisco Catalyst 3750G ( or a troubleshoot manual for it with test points ) but I could not find any. Could any of you find something close to that?I need that in order to debug my switch that died some time ago. It throws errors like"1 Retry (ASICs Detected 0,configured 7)MIC Conf reg value 110 0MIC PCS INfo 0x3MIC Interrupts received 0x0"Initially the max3232 died so that is changed now but I still have no idea what made the max blow in the first place. What I want to do is try to find the actual problem why it's not finding the asics. ( could all 7 asics be dead? ). There are 4 max3780 chips that run at around 87 deg celsius and I am thinking that they might be blown as well. The max3780 ( and most of the chips on the board ) seem to run @125Mhz.The max 3780 chips ( which are used for stacking I think ) get their clock input from a IDT ICS8535-01 ( that is connected to the 125Mhz oscilator ) ( does anybody have any idea how I can test that oscilator with a 25Mhz osciloscope? ) and as I see it the rest of the board gets their clock input via 2 cascaded chips that are CY2CC8100I / twn0537 ( which I think are 1:10 Clock Fanout Buffer ). Till I test the frequency that it works I guess that one of the above chips failed but can't be sure.Any thoughts?Thanks

author: asp
author_rank: Regular Contributor
timestamp: January 30, 2014, 09:55:43 am
content: Below you can find some images of the board and chips. If anybody has any idea please let me know.Thanks

author: johnh
author_rank: Regular Contributor
timestamp: January 30, 2014, 10:44:58 pm
content: Considering that Cisco swap hardware, when you have service contract. I don't think you will find a service manual.I think you have Buckley's and none of repairing ithttp://en.wiktionary.org/wiki/Buckley%27s_and_noneGood luck

author: madires
author_rank: Super Contributor
timestamp: January 30, 2014, 11:16:24 pm
content: Unless it's a simple problem like a broken PSU you won't have much success fixing the switch since Cisco's stuff is full of ASICs. Sorry!

author: asp
author_rank: Regular Contributor
timestamp: January 31, 2014, 08:33:48 am
content: I will try to order 7 CYNSE70130B chips ( which I think are the ASICs that the software complains about ) since the error message is "1 Retry (ASICs Detected 0,configured 7)". I think I might get around with swapping the 7 chips.Now I need to check the pricesThanks

author: nncm
author_rank: Newbie
timestamp: March 16, 2014, 02:54:43 pm
content: Hello asp,I have an out of waranty 3750G-48TS with a problem on a specific asic chip and I came across your post Googling for some resources to identify the asic. Just curious, did you have any luck reparing yours? Personally I haven't removed any heatsinks yet and even if I do, I'm not sure if I can even see a visual indication for a faulty component. My board and output (SSRAM (asic:3, bit: 0) address bus test failed):(large:)Code:File "flash:c3750-ipbase-mz.122-50.SE5/c3750-ipbase-mz.122-50.SE5.bin"uncompressed and installed, entry point: 0x1000000executing...Restricted Rights LegendUse, duplication, or disclosure by the Government issubject to restrictions as set forth in subparagraph(c) of the Commercial Computer Software - RestrictedRights clause at FAR sec. 52.227-19 and subparagraph(c) (1) (ii) of the Rights in Technical Data and ComputerSoftware clause at DFARS sec. 252.227-7013.cisco Systems, Inc.170 West Tasman DriveSan Jose, California 95134-1706Cisco IOS Software, C3750 Software (C3750-IPBASE-M), Version 12.2(50)SE5,RELEASE SOFTWARE (fc1)Technical Support: http://www.cisco.com/techsupportCopyright (c) 1986-2010 by Cisco Systems, Inc.Compiled Tue 28-Sep-10 12:56 by prod_rel_teamImage text-base: 0x01000000, data-base: 0x02800000Initializing flashfs...flashfs: 998 files, 16 directoriesflashfs: 0 orphaned files, 0 orphaned directoriesflashfs: Total bytes: 32514048flashfs: Bytes used: 32160256flashfs: Bytes available: 353792flashfs: flashfs fsck took 29 seconds.flashfs: Initialization complete....done Initializing flashfs.Checking for Bootloader upgrade.. not neededPOST: CPU MIC register Tests : BeginPOST: CPU MIC register Tests : End, Status PassedPOST: PortASIC Memory Tests : BeginPOST: PortASIC Memory Tests : End, Status PassedPOST: CPU MIC interface Loopback Tests : BeginPOST: CPU MIC interface Loopback Tests : End, Status PassedPOST: PortASIC RingLoopback Tests : BeginPOST: PortASIC RingLoopback Tests : End, Status PassedWaiting for Stack Master Election...front_end/ (directory)extracting front_end/fe_type_1 (34760 bytes)extracting front_end/fe_type_2 (78400 bytes)extracting front_end/front_end_ucode_info (86 bytes)extracting ucode_info (76 bytes)POST: PortASIC CAM Subsystem Tests : BeginSSRAM (asic:3, bit: 0) address bus test failedWrite: 00000001Read: 00000008HTD POST: Address Bus Test FailedPOST: POST FailedPOST: PortASIC CAM Subsystem Tests : End, Status FailedPOST: CAM test failedPOST Failed: disabling stack links and shutting down SDPdriver class subsystem initialization failed*Mar 1 00:03:35.176: %SYS-3-LOGGER_FLUSHING: System pausing to ensureconsole debugging output.*Mar 1 00:03:35.176: %SYS-2-ASSERTION_FAILED: Assertion failed:"reg_used_xdr_portid_to_lc_logical_slot()" -Process= "Init", ipl= 0, pid= 3-Traceback= 1D48638 1D48D84 1CB4B58 11E02CC 11E04BC 257D684 257D71C 1D542F81D54534 1A71E14 1A688D8%Software-forced reload00:03:35 UTC Mon Mar 1 1993: Unexpected exception to CPUvector 2000, PC =1A6FE88-Traceback= 1A6FE88 1A6FE4C 11E02CC 11E04BC 257D684 257D71C 1D542F8 1D545341A71E14 1A688D8=== Flushing messages (00:03:35 UTC Mon Mar 1 1993) ===Buffered messages:Queued messages:*Mar 1 00:03:35.998: %SYS-3-LOGGER_FLUSHING: System pausing to ensureconsole debugging output.*Mar 1 00:03:35.603: %SYS-3-LOGGER_FLUSHED: System was paused for 00:00:00to ensure console debugging output.*Mar 1 00:03:35.637: %SYS-3-MGDTIMER: Uninitialized timer, init withuninitialized master, timer = 37F9600. -Process= "Init", ipl= 0, pid= 3-Traceback= 1D48638 1D48D84 2575380 2575454 25755D0 219A030 2193F60 219657821966E8 22F4F14 22F6054 22F35F0 22F36A4 22FB290 1A6F96C 1A6FE4C*Mar 1 00:03:35.637: NRGYZ:ERROR:Socket creation failed for UDP*Mar 1 00:03:35.637: NRGYZ:ERROR:Socket connect fail for 255.255.255.255:0(13)*Mar 1 00:03:35.872: %Insufficient flash filespace for extended crashinfo.Cisco IOS Software, C3750 Software (C3750-IPBASE-M), Version 12.2(50)SE5,RELEASE SOFTWARE (fc1)Technical Support: http://www.cisco.com/techsupportCopyright (c) 1986-2010 by Cisco Systems, Inc.Compiled Tue 28-Sep-10 12:56 by prod_rel_teamDebug Exception (Could be NULL pointer dereference) Exception (0x2000)!SRR0 = 0x016B6778 SRR1 = 0x00029230 SRR2 = 0x016B5824 SRR3 = 0x00021000ESR = 0x00000000 DEAR = 0x00000000 TSR = 0x8C000000 DBSR = 0x10000000CPU Register Context:Vector = 0x00002000 PC = 0x01A6FE88 MSR = 0x00029230 CR = 0x39000053LR = 0x01A6FE4C CTR = 0x0259B244 XER = 0xE0000029R0 = 0x01A6FE4C R1 = 0x0385C8C0 R2 = 0x00000000 R3 = 0x04B650E0R4 = 0x00000053 R5 = 0x00000005 R6 = 0x00000000 R7 = 0x00000053R8 = 0x00115880 R9 = 0x00000000 R10 = 0x00000053 R11 = 0x0344AAF0R12 = 0x98483580 R13 = 0x00110000 R14 = 0x01D544D4 R15 = 0x00000000R16 = 0x00000000 R17 = 0x00000000 R18 = 0x00000000 R19 = 0x00000000R20 = 0x00000000 R21 = 0x00000000 R22 = 0x00000000 R23 = 0x00000000R24 = 0x00000000 R25 = 0x00000000 R26 = 0x00000000 R27 = 0x00000001R28 = 0x000004A5 R29 = 0x0281AC24 R30 = 0x029B3460 R31 = 0x00000000Stack trace:PC = 0x01A6FE88, SP = 0x0385C8C0Frame 00: SP = 0x0385C8D0 PC = 0x01A6FE4CFrame 01: SP = 0x0385CB98 PC = 0x01CB4C34Frame 02: SP = 0x0385CBB0 PC = 0x011E02CCFrame 03: SP = 0x0385CC00 PC = 0x011E04BCFrame 04: SP = 0x0385CC08 PC = 0x0257D684Frame 05: SP = 0x0385CC20 PC = 0x0257D71CFrame 06: SP = 0x0385CC40 PC = 0x01D542F8Frame 07: SP = 0x0385CD48 PC = 0x01D54534Frame 08: SP = 0x0385CD50 PC = 0x01A71E14Frame 09: SP = 0x00000000 PC = 0x01A688D8

author: asp
author_rank: Regular Contributor
timestamp: March 20, 2014, 08:45:07 pm
content: I did try to identify as many parts of the board as I could since the switches are different.Can't remember right now what the chips in the first picture in the yellow box are for ( they are some TI chips ).On the second image it's the chip that I think if faulty on your chip. It errors on CAM memory tests so I think is the third TCAM memory that's fauly. You could try to remove it with a hot air gun or swap it with another one and see if the error and the memory addresses are the same.This is the relevant part ASIC:3 ( so by my uneducated guess it's the CAM memory on the 3rd ASIC ). If the error is persistent it might either be some resistors on the back or some capacitors ( try to test the tantalum caps on the back of the board as well ) or the asic itself ( or they might have some random numbering of the asics but I guess that is not the case )Later edit: You might also consider the sram on top of the board as it fails in a stacking subtestalso some hi-res photos would be really good----POST: PortASIC CAM Subsystem Tests : BeginSSRAM (asic:3, bit: 0) address bus test failedWrite: 00000001Read: 00000008HTD POST: Address Bus Test Failed----Hope this helpsPS: I had not yet been able to fix mine. I think I will keep this one for spares.