在此记录一下此机(康佳LED46IS97N)的维修过程。拆机前 开机指示灯亮,按键和遥控器不起作用,无光无声。拆机后 测得24V 12V 5V都正常,处于开机状态。连接809F 读不出打印信息,觉得主控芯MST6I78没正常工作。测引导程序存储块W25O80 2 5脚没跳变电压,焊下此块 809F提示ID错误或损坏。在版主帮助下 装好25Q80 开机 恢复正常。以下是读出的打印信息 UART_115200
BIST0-OK
BIST1-OK
[123456789][012345678]-54
[123456789][012345678]-54
_nPD
U-Boot 1.1.6 (Jun 30 2010 - 18:47:51)
Board: MSTAR TITANIA (CPU Speed 504 MHz)
DRAM: 0x8000000
Skipping flash_init
Flash: 0 kB
NAND: nand_bbt: searching bbt....Bad block table found at page 262080, version 0x01
nand_bbt: searching bbt.....Bad block table found at page 262016, version 0x01
nand_read_bbt: Bad block at 0x04600000
nand_read_bbt: Bad block at 0x117a0000
512 MiB
In: serial
Out: serial
Err: serial
Net: No ethernet found.
MSVC00B000100100208768TH0000000T
Set MIU0 group priority:c9.....
Set MIU1 group priority:c9.....
Set MIU0 group priority:c9.....
Set MIU1 group priority:c9.....
Change MIU0 select.....
Group0:d80 Group1:88 Group2:200 Group3:f1
Change MIU1 select.....
Group0:4200 Group1:e00 Group2:30 Group3:4000
start init IIC-------------->
come to konka path----@1------
EEPROM @0x0 read: addr 80200000 off 1ffa count 1 ... cmd: md.b 0x80200000 0x1
80200000: a5 .
done
EEPROM @0x0 read: addr 80400000 off 1ffb count 1 ... cmd: md.b 0x80400000 0x1
80400000: 5a Z
done
memory display value read from eeprom ----->:80200000: 5a5aa5a5 ..ZZ
80400000: 8000105a Z...
data_1[1FFA]--->:a5
data_2[1FFB]--->:5a
---------->defatult_set is:165
---------->defatult_set1 is:90
*ucp is:165
*ucp1 is:90
startFlag_2 is:-1
keypad_pressed is [0]
Hit any key to stop autoboot: 0
0x00220000-0x1f260000 : "mtd=3"
Volume KL found at volume id 0
read 4194304 bytes from volume 0 to 81000000(buf address)
## Booting image at 81000000 ...
Image Name: Linux-2.6.28.10-mstar
Created: 2010-05-04 2:51:22 UTC
Image Type: MIPS Linux Kernel Image (lzo compressed)
Data Size: 3404531 Bytes = 3.2 MB
Load Address: 80400000
Entry Point: 80404150
Uncompressing Kernel Image ... OK
Starting kernel ...
Linux version 2.6.28.10 (root@localhost.localdomain) (gcc version 4.3.2 (Sourcery G++ Lite 4.3-51) ) #13 PREEMPT Tue May 4 10:51:02 CST 2010
LINUX started...
boot_command_line: console=ttyS0,115200 ubi.mtd=3,2048 root=ubi:RFS rootfstype=ubifs rw LX_MEM=0x2F00000 EMAC_MEM=0x100000 DRAM_LEN=0x10000000 LX_MEM2=0x43F04000,0x4000000 MS_GOP0_MIU=0 mtdparts=edb64M-nand:128k(NPT),1m(BL0),1m(BL1),508160k(UBI),-(NA)
LX_MEM = 0x400000, 0x2F00000
LX_MEM2 = 0x43F04000, 0x4000000
CPHYSADDR(PFN_ALIGN(&_end))= 0x9AA000
EMAC_LEN= 0x100000
DRAM_LEN= 0x10000000
console [early0] enabled
CPU revision is: 00019554 (MIPS 34Kc)
Begin Titania3_setup
BDetermined physical RAM map:
memory: 02f00000 @ 00400000 (usable)
memory: 04000000 @ 43f04000 (usable)
Wasting 32768 bytes for tracking 1024 unused pages
Initrd not found or empty - disabling initrd
Zone PFN ranges:
DMA 0x00000400 -> 0x00008000
Normal 0x00008000 -> 0x00020000
HighMem 0x00020000 -> 0x00047f04
Movable zone start PFN for each node
early_node_map[2] active PFN ranges
0: 0x00000400 -> 0x00003300
0: 0x00043f04 -> 0x00047f04
Normal zone: 768 pages exceeds realsize 0
Built 1 zonelists in Zone order, mobility grouping on. Total pages: 26889
Kernel command line: console=ttyS0,115200 ubi.mtd=3,2048 root=ubi:RFS rootfstype=ubifs rw LX_MEM=0x2F00000 EMAC_MEM=0x100000 DRAM_LEN=0x10000000 LX_MEM2=0x43F04000,0x4000000 MS_GOP0_MIU=0 mtdparts=edb64M-nand:128k(NPT),1m(BL0),1m(BL1),508160k(UBI),-(NA)
alloc ebase: 818fc000
Primary instruction cache 32kB, VIPT, 4-way, linesize 32 bytes.
Primary data cache 32kB, 4-way, VIPT, cache aliases, linesize 32 bytes
Writing ErrCtl register=00077c37
Readback ErrCtl register=00077c37
PID hash table entries: 256 (order: 8, 1024 bytes)
CPU freq count = 252000000
CPU frequency 504.00 MHz
console handover: boot [early0] -> real [ttyS0]
Dentry cache hash table entries: 8192 (order: 3, 32768 bytes)
Inode-cache hash table entries: 4096 (order: 2, 16384 bytes)
Memory: 98500k/48128k available (3900k kernel code, 15080k reserved, 1331k data, 164k init, 65536k highmem)
SLUB: Genslabs=6, HWalign=32, Order=0-3, MinObjects=0, CPUs=1, Nodes=1
Calibrating delay loop... 334.84 BogoMIPS (lpj=167424)
Mount-cache hash table entries: 512
net_namespace: 288 bytes
NET: Registered protocol family 16
SCSI subsystem initialized
usbcore: registered new interface driver usbfs
usbcore: registered new interface driver hub
usbcore: registered new device driver usb
cfg80211: Using static regulatory domain info
cfg80211: Regulatory domain: US
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