MiTAC M722 Service Manual & Troubleshooting Manual Download Page 99

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M722 N/B MAINTENANCE

6.5 KEYBOARD(K/B) TOUCH-PAD(T/P) TEST ERROR

Error message of keyboard failure is shown or any key doesn’t work.

U16

H8/3434F

KEYBOARD

CONTROLLER

KI[0:7]

KO[0:15]

IOW#

IOR#

IRQ1

IRQ12

SD[0:7]

H8_KBCS#

+3V

RP57

U510

BANISTER

KBD_US/JP#

16MHz

TOUCH-PAD MODULE

SW2

SW3

T_DATA

L20

L19

R161

R162

+5V

C171

T_ CLK

SW3

SW2

KO2
KO12
KI1
K12
K13
KI4

SW B.D

L23

Quick Key Transfer B.D

SW1

R134

U17

74CBTD

3384

KBCS#

Summary of Contents for M722

Page 1: ...LOGY DEPARTMENT TSSC TESTING TECHNOLOGY DEPARTMENT TSSC BY BY Alex Thomas Alex Thomas SEP 2000 SEP 2000 SERVICE MANUAL TROUBLESHOOTING GUIDE FOR SERVICE MANUAL TROUBLESHOOTING GUIDE FOR SERVICE MANUAL TROUBLESHOOTING GUIDE FOR ...

Page 2: ...ATION CONNECTORS SWITCHES 2 DEFINITION LOCATION MAJOR COMPONENTS 3 PIN DESCRIPTIONS OF MAJOR COMPONENTS 4 M722 BLOCK DIAGRAM SWITCH SETTING 5 ASSEMBLY DISASSEMBLY 5 A MAINTENANCE DIAGNOSTIC 6 TROUBLE SHOOTING 7 SPARE PARTS LIST 8 CIRCUIT DIAGRAM P 2 P 35 P 39 P 42 P 57 P 60 P 83 1 P 84 P 105 P 114 ...

Page 3: ...2 M722 N B MAINTENANCE M722 N B MAINTENANCE M 722 Hardware Engineering Specification 0 HARDWARE ENGINEERING SPECIFICATION ...

Page 4: ... 2 7 AC 97 AUDIO SYSTEM CRYSTAL CS 4299 17 0 2 8 MDC PCTEL MODEM DAUGHTER CARD 19 0 2 9 SUPER IO NS PC 97338VJG 19 0 2 10 IR MODULE VISHAY TFDU6101E 20 0 2 11 KEYBOARD SYSTEM H8 3434 UNIVERSAL KEYBOARD CONTROLLER 20 0 2 12 SYSTEM FLASH MEMORY BIOS 22 0 2 13 MEMORY SYSTEM 22 0 2 13 1 On Board Main Memory 22 0 2 13 2 JEDEC 144 pin SO DIMM sockets 22 0 2 14 LAN REALTEK RTL8139CL 23 0 2 15 IEEE 1394 N...

Page 5: ...722 N B MAINTENANCE 0 6 M722 EXTERNAL SPECIFICATIONS R0 4 30 0 7 OUTPUT POWER 32 7 1 INVERTER OUTPUT CHARACTERISTICS 32 7 2 AC LOAD CHARACTERISTICS 32 0 8 ELECTRONIC SPECIFICATION 33 8 1 INPUT SECTION 33 8 2 OUTPUT SECTION 34 ...

Page 6: ...ure 2 System clock structure and ICS 9148 101 block diagram 12 Figure 3 ATI Rage Mobility M 15 Figure 4 CS4299 17 Figure 5 AC links 17 Figure 6 NS PC97338VJG 19 Figure 7 SO Dimm Module 22 Figure 8 RTL8139CL Block Diagram 24 Figure 9 Block Diagrams 25 Figure 10 PHY Block Diagrams 26 Figure 11 LINK Block Diagrams 26 ...

Page 7: ...PCI PCI 2 1 reduces CPU latencies for smoother video and more realistic audio 2 Universal Serial Bus USB technology makes Plug and Play peripheral connections a reality The Intel 82440MX Chipset also contains an integrated PCI Bus Mastering IDE controller with one high performance IDE interfaces and supports Ultra 33 synchronous DMA mode which transfers up to 33 Mbytes per second In addition the 4...

Page 8: ... Exceptional value and improved performance over existing mobile processors Supports the Intel Architecture with Dynamic Execution Supports the Intel Architecture MMX technology Support for Streaming SIMD Extensions for enhanced video sound and 3D performance Support Intel Speedstep Technology Integrated Intel Floating Point Unit compatible with the IEEE Std 754 Integrated on die primary L1 instru...

Page 9: ...or Pentium III processors at 100MHz host bus frequency Supports 32 bit mobile Celeron processor Pentium III processor bus addressing 4 or 1 deep in order queue 4 or 1 deep request queue Supports uni processor systems only In order transaction and dynamic deferred transaction support GTL bus driver technology gated GTL receivers for reduced power Integrated DRAM controller 8 to 512 Mbytes Supports ...

Page 10: ...s accessing ISA w EIO Multifunction PCI to ISA Bridge Supports PCI at 30 MHz and 33 MHz Supports PCI Rev 2 2 Specification Supports Full ISA or Extended I O EIO Bus Supports Full Positive Decode or Subtractive Decode of PCI Supports ISA and EIO at 1 4 of PCI Frequency Supports both Mobile and Desktop Deep Green Environments 3 3V Operation with 5V Tolerant Buffers Ultra low Power for Mobile Environ...

Page 11: ...sh Request Speaker Tone Output USB Two USB 1 1 Ports for Serial Transfers at 12 Mbor 1 5 MB sec Supports Legacy Keyboard and Mouse Software with USB based Keyboard and Mouse Supports UHCI Design Guide SMBus Host Interface Allows CPU to Communicate Via SMBus Slave Interface Allows External SMBus Master to Control Resume Events Real Time Clock 256 byte Battery Back CMOS SRAM Includes Date Alarm Two ...

Page 12: ... buffer ICS9148 101 Maximized EMI suppression using ICS spread spectrum technology Two copies of CPU output output to output skew between them within 175ps and six copies of PCI output output to output skew within 500ps One 48MHz output for USB and selectable 24 48MHz output pin 27 Two buffer copies of 14 318MHz input reference signal Supports 100MHz or 66MHz CPU operation ...

Page 13: ...wo SDRAM DIMMS Ideal for high performance systems designed around Intel s latest mobile chip set I2C serial configuration interface Skew between any two SDRAM output is less than 250ps 1 to 5ns propagation delay Dc to 133mhz operation Singles 3 3V supply voltage Low power CMOS design packaged in a 48 pin SSOP Shrink small package Figure 2 System clock structure and ICS 9148 101 block diagram ...

Page 14: ...rface 455 Mbps channel with 65 MHz pixel clock rate 3 pairs 1 clock and 4 pairs 1 clock modes for both single and dual pixel LVDS FPDI 2 compliant compatible with receivers from National Semiconductor and Texas Instruments LVDS eye pattern to improve testability of LVDS module Flat panel power management Automatic power down panel by programmable internal timer Standby Suspend pins for hardware Po...

Page 15: ...deo scalar De interlacing filter Video on graphics overlay Multi stream video Color space conversion Scatter gather bus master Planar YUV mode ATI Multimedia Channel AMC video input port Zoom Video input port ZV port Improves software DVD MPEG 2 frame rate by 20 to 30 Provides full motion MPEG 2 playback on Pentium III processors Supports 3D Acceleration integrated 1 million triangle s set up engi...

Page 16: ...ages DVD MPEG 2 decode assist provides dramatically improved frame rate Hardware mirroring for flipping video images in video images in video conferencing systems Smooth video scaling and enhanced YUV to RGB color space conversion Front and back end scalars support multi stream video for video conferencing Filtered horizontal vertical up down scaling enhances playback quality Figure 3 ATI Rage Mob...

Page 17: ...ort PCI Bus Lock LOCK 3 3 V core logic with universal PCI interface PCI Local Bus Specification Revision 2 2 compliant 1998 PC Card Standard compliant Supports one 16 bit PC card or Cardbus card sockets powered at 3 3V or 5V with hot insertion and removal ExCA compatible Registers mapped in memory or I O space Supports ring indicate output SUSPEND and programmable output select for CLKRUN Provides...

Page 18: ...20 bit Stereo Digital to Analog Converter and 18 bit Stereo Analog to Digital Converter with Sample Rate Conversion Four Analog Line level Stereo Inputs for Connection from LINE IN CD VIDEO and AUX Two Analog Line level Mono Inputs for Modem Sub system and Internal PC Beeper Mono Microphone Input Switch able from Two External Sources High Quality Pseudo Differential CD Input Dual Stereo Line level...

Page 19: ...and secondary operating modes Support ACPI power management Operating temperature range from 0 to 60 degree c Power consumption less than 100Mw Support PCTel Modem driver on demand 0 2 9 Super IO NS PC 97338VJG High speed PC16550A compatible UART with receive transmit 16 Bytes FIFO programmable serial baud rate generator Multi mode parallel port support including standard port EPP ECP IEEE1284 com...

Page 20: ...ECP IEEE1284 compliant 2 interrupt pins Plug and Play module FDC 100 IBM compatible S W register compatible to 82077 with 16Bytes data FIFO Support 3 Mode FDD FIR MIR SIR SHARP ASK for Infrared application COM2 IrDA 1 0 IrDA 1 1 SHARP ASK Baud rate max 4Mb Link distance 0 01 to 1 m Half angle 15 Bit Error Rate BER 10 9 Peak wavelength 0 85 0 90 µm TQFP 100 pins Standby mode control by software Fig...

Page 21: ... Supply Current Power Shutdown Mode 1uA Shutdown Current Built in EMI protection Edge Detection Input Prevents the LED from long turn on time Directly Interface with various Super I O and Controller Devices Few External Components Required 0 2 11 Keyboard System H8 3434 Universal Keyboard Controller CPU Two way general register configuration Eight 16 bit registers or Sixteen 8 bit registers High s...

Page 22: ... keyboard scan function with wake up Interrupts and sense ports A D converter 10 bit resolution 8 channels single or scan mode selectable D A converter 8 bit resolution 2 channels Interrupts nine external interrupt lines NMI IRQ0 to 7 26 on chip interrupt sources Power down modes Sleep mode Software standby mode Hardware standby mode A single chip microcomputer On chip flash memory Maximum 64 kbyt...

Page 23: ...ry size 4Mx16bit SDRAM x8 pcs Total 64Mbyte Config 2 memory size 8Mx16bit SDRAM x4 pcs Total 64Mbyte Config 3 memory size 8Mx16bit SDRAM x8 pcs Total 128Mbyte Standard 54 pin TSOP package Power supply 3 3V 0 3V Memory bus bandwidth 64 bits 0 2 13 2 JEDEC 144 pin SO DIMM sockets Supports one JEDEC 144 pin SO DIMM sockets on Mother Board for expansion Supports 3 3V SDRAM 2 banks on one socket PC 100...

Page 24: ...d data transfers of RTL8139A s operational registers Support 10 Mb s and 100 Mb s N way Auto negotiation operation Support up to 128K bytes Boot ROM interface Allow remote wake up Magic packet and Microsoft wake up frame Include a programmable PCI burst size and early tx rx threshold Support a 32 bit general purpose timer referenced by the external PCI clock source and timer interrupt Contain two ...

Page 25: ...24 M722 N B MAINTENANCE M722 N B MAINTENANCE Figure 8 RTL8139CL Block Diagram ...

Page 26: ...2 bit host interface compliant to PCI Specification release 2 1 Support PCI Bus Power Management Interface Specification release 1 0 Modular 32 bit host interface compliant to Card Bus Specification Cycle Master and Isochronous Resource Manager capable Built in FIFOs for isochronous transmit 1024 bytes asynchronous transmit 1024 bytes and receive 2048bytes 32 bit CRC generation and checking for re...

Page 27: ...26 M722 N B MAINTENANCE M722 N B MAINTENANCE Figure 10 PHY Block Daigrams Figure 11 Link Block D aigram s ...

Page 28: ...ack for PSTN line One RJ 45 for LAN S PDIF Digital Audio output Microphone Input Jack One Cardbus Socket for extension One IDE extended port for IDE CDROM DVD 0 4 PERIPHERAL COMPONENTS 0 4 1LCD PANEL Brand model mane HITACHI TX31D70VC1CAA XGA P HYUNDAI HT12X11 100 P SANYO TM121XG 02L02A 0 4 2 Floppy Disk Drive USB Mitsumi D353GU 3 5 1 44MB 1 2MB 720KB FDD 0 4 3 HDD IBM 2 5 9 5mmH 6 0GB DARA 206000...

Page 29: ...MAINTENANCE M722 N B MAINTENANCE 0 4 4 24X CD ROM Drive Brand model mane Quanta SCR 242E Matsushita UJDA150 0 4 5 8X DVD ROM drive Brand model mane QUANTA SDR 081E 0 4 6 Keyboard OKI 0 4 7 Touch Pad ALPS 0 4 8 Fan ...

Page 30: ...LUG GPIO11 Resume BATLOW BATLOW 1 Input O H8_12V GPIO12 Resume RI RI 1 Input I WAKE_UP GPIO13 AUDIO AUDIO Input I IDEDASP_ON GPIO14 SPKR FDD SPKR 0 Output O SPKR GPIO15 SERIAL A SERIAL A Input I CCD1 GPIO16 PCS1 SERIAL B PCS1 1 Output I HUB_SUSPEND GPIO17 Resume LPT LPT Input O MD ID0 GPIO18 Resume GENERIC 1 GENERIC 1 Input O MD ID1 GPIO19 PCS0 GFX PCS0 1 Output O LAN_IN GPIO20 Resume CARDBUS 0 CA...

Page 31: ...e IDE I F support boot up CD RW support for future models Factory option FDD 3 5 Format for 720KB 1 2MB 1 44MB External USB I F Support USB FDD boot HDD 2 5 8 45 9 5 mm height 5 6 10 12 15GB support Ultra DMA33 66 Display 12 1 XGA TFT display AGAR Anti Glare Anti Reflection 16M colors in LCD Resolution 1024x768 XGA Video Controller ATI Mobility M 4MB SDRAM integrated Support Multi Monitor Keyboard...

Page 32: ...dem K56Flex V 90 Power Supply 4 cell Li ion Battery standard optional battery 12 cell Li ion User swappable BATT Life 1 5hrs with standard battery 4 cell Li ion 20 7W 4 5hrs with optional battery 12 cell Li ion 62 2W AC adapter Universal AC adapter 60W Input 100 240V 50 60Hz AC Dimensions Main unit 269x218x24 4 Min 28 3 Max mm Weight Main System 1 575Kg incl HDD CPU w o CD ROM Drive FDD Accessorie...

Page 33: ...nal Maximum Units Lamp ignition voltage Vs 1450 Volts rms Lamp discharging voltage VL 650 Volts rms Lamp discharging current IL 2 2 4 5 6 0 mA rms Lamp discharging frequency 50 55 60 KHz 0 7 2 AC Load Characteristics The inverter shall be one LCD of either type listed below ITEM Vendor Inverter Vendor LCD Panel 1 INN SU N 23A9S 01E 412219300045 SANYO TM121XG 02L02 2 INN SU N 23A9S 01E 412219300045...

Page 34: ...0 3x34 0x49 8 10 3x34 0x49 8 Pieces per Pack 4cells 12 cells Nominal Voltage Pack 14 8 V 14 8 V Capacity 1400 mAh 4200mAh Supply Power 20 72W 62 16W Part P N 44268900001 442668900002 Protection Timer Thermal Breaker Temperature Sensor Service Life 300 charge discharge cycles 85 capacity Charging Time 4S1P Li Ion 2hrs Full Charge by system OFF 3 6 hrs Slow Full Charge by system ON 4S3P Li Ion 3hrs ...

Page 35: ...T Vcc5 Vcc3 V cc_core VTT Tolerance 5 5 5 5 MIN CURRENT 0 5A 0 5A 0 5 0 5A MAX CURRENT 4 5A 4 5A 14A 2 7A PEAK CURRENT 5A 5A 18A 3A RIPPLE AND NOISE 100mV 100mV 100mV 100mV O V P 5 6V 3 6V SHORT PROTECT ˇ ˇ ˇ ˇ ˇ ˇ ˇ ˇ ˇ ˇ ˇ ˇ OVER SHOOT 100mV 100mV 115mV 115mV EFFICIENCY 85 85 80 85 OUTPUT VDD5 2 5V Vcc12 Tolerance 5 5 5 MIN CURRENT 0A 0 5A 0A MAX CURRENT 80mA 1A 80mA PEAK CURRENT 100mA 1 5A 100m...

Page 36: ...h pad SW4 E Mail button SW5 Battery Capacity button SW6 Cover Suspend SW J1 Quick key transfer BD connector J2 LCD panel connector J4 Internal keyboard connector J5 Touch_pad module connector J6 Hard disk drive connector J7 MDC LAN transfer board connector J9 Internal left channel speaker connector J10 External speaker connector J11 External MIC in connector SW1 SW2 SW3 J2 J1 J5 J6 J7 SW4 SW5 SW6 ...

Page 37: ... System reset button SW502 LCD Panel ID Section J501 USB connector J502 144 pins expansion SDRAM socket J503 DC DC board connector J504 PC card socket J505 USB connector J506 MDC LAN transfer board connector J507 CMOS Battery connector J508 1394 connector J509 USB connector J504 J506 J507 J508 J509 VR50 1 J510 J505 SW501 SW502 J502 J503 J501 ...

Page 38: ...5 JP1 U2 U1 JP3 MDC LAN transfer board JP1 MDC jump wire connector JP3 Connector 2 for connected MDC LAN transfer board to M B J2 RJ 11 phone jack for internal modem J3 Connector 1 for connected MDC LAN transfer board to M B J4 RJ 45 internal LAN connector J5 MDC jump wire connector 1 3 Daughter Board ...

Page 39: ...C board side B J1 External VGA monitor connector J2 Backlight connector for LCD panel J3 USB Connector J4 FAN Connector PJ3 Power jack AC adapter PJ2 Battery pack connector SW1 System power on off switch J1 PJ3 J2 PJ2 J4 J3 PU2 U21 SW1 DC to DC board side A J501 Connector for connected the DC DC BD to M B PU503 J501 ...

Page 40: ...board 64MB main memory U509 CPU INTEL PIII Celeron µPGA2 495 U510 Banister U514 System BIOS U520 U522 74CBTD3384 U519 TUSB2036 USB HUB VR501 Volume Up Down J502 Ext SDRAM socket J504 PC Card socket J508 1394 connector J509 USB connector J510 E mail switch 2 1 Main Board Side A J508 J509 VR501 X505 U519 U514 J510 U520 U522 U521 U510 SW501 U507 U508 U524 PU502 U509 U506 U505 U504 U503 J502 J504 ...

Page 41: ...20 RTL 8139 PCI BL PCI LAN U19 IEEE 1397 UPD72870 U22 PCI1410 Card bus controller U24 LM4834 AUDIO AMP SW1 Country selection for keyboard SW2 Left button switch of touch pad SW3 Right button switch of touch pad SW4 E Mail button SW5 Battery Capacity button SW6 Cover Suspend SW 2 2 Main Board SIDE B U3 U4 U5 U6 U2 U7 U8 U15 U17 SW1 U16 U19 U20 U22 U23 U25 U18 U26 SW2 SW3 PU1 PU2 SW4 SW5 SW6 J11 J10...

Page 42: ...AINTENANCE 2 3 Definition Of Daughter Board J4 J2 J3 J1 JP1 U2 U1 JP3 DC to DC board side B DC to DC board side A MDC LAN transfer board IR module 2 DEFINITION LOCATION OF MAJOR COMPONENTS J501 J1 PJ3 J2 PJ2 J4 J3 PU2 U21 SW1 PU503 J501 ...

Page 43: ...olerant The BCLK Bus Clock signal determines the system bus frequency Both system bus agents must receive this signal to drive their outputs and latch their inputs on the BCLK rising edge All external timing parameters are specified with respect to the BCLK signal Signal Name I O Signal Description BERR I O GTL The BERR Bus Error signal is asserted to indicate an unrecoverable error without a bus ...

Page 44: ... pins balls on both agents The data driver asserts DRDY to indicate a valid data transfer Signal Name I O Signal Description DBSY I O GTL The DBSY Data Bus Busy signal is asserted by the agent responsible for driving data on the system bus to indicate that the data bus is in use The data bus is released after DBSY is deasserted This signal must be connected to the appropriate pins balls on both ag...

Page 45: ...onous input If INIT is sampled active on RESET s active to inactive transition then the processor executes its built in self test BIST Signal Name I O Signal Description INTR I 1 5V Tolerant The INTR Interrupt signal indicates that an external interrupt has been generated INTR becomes the LINT0 signal when the APIC is enabled The interrupt is maskable using the IF bit in the EFLAGS register If the...

Page 46: ...able 17 Section 3 7 and be followed by a 1 ms RESET pulse PWRGOOD Relationship at Power On Signal Name I O Signal Description REQ 4 0 I O GTL The REQ 4 0 Request Command signals must be connected to the appropriate pins balls on both agents on the system bus They are asserted by the current bus owner when it drives A 35 3 to define the currently active transaction type RESET I GTL Asserting the RE...

Page 47: ...gnal when asserted causes the processor to enter a low power Stop Grant state The processor issues a Stop Grant Acknowledge special transaction and stops providing internal clock signals to all units except the bus and APIC units The processor continues to snoop bus transactions and service interrupts while in the Stop Grant state When STPCLK is deasserted the processor restarts its internal clock...

Page 48: ...that have Intel SpeedStep technology enabled VID 4 0 encode the voltage required in the battery optimized mode VID 4 0 are needed to cleanly support voltage specification changes on mobile Pentium III processors The voltage encoded by VID 4 0 is defined in Table 39 A 1 in this table refers to an open pin ball and a 0 refers to a short to VSS The power supply must provide the requested voltage or d...

Page 49: ... Signal Type Description A20GATE I Address 20 Gate This input from the keyboard controller is logically combined with a bit in Port 92h which is then output via the A20M signal A20GATE saves the external OR gate needed with various other chipsets A20M OD Address 20 Mask A20M goes active by either setting the appropriate bit in the Port 92h Register or by the A20GATE input signal ADS I O Address St...

Page 50: ...ow Address Strobe SDRAM The SRAS signal generates SDRAM commands encoded on SRAS SCAS WE signals WE O Write Enable Signal SDRAM WE is asserted during writes to DRAM The WE lines have a programmable buffer strength that can be optimized for different signal loading conditions INTR OD CPU Interrupt INTR is driven by the 440MX to signal the CPU that an interrupt request is pending and needs to be ser...

Page 51: ...ctly drive the corresponding signals on the IDE connector PDDAK O IDE Device DMA Acknowledge This signal directly drives the DAK signal on the IDE connectors It is asserted by the 440MX to indicate to IDE DMA slave devices that a given data transfer cycle assertion of PDIOR or PDIOW is a DMA data transfer cycle This signal is used in conjunction with the PCI bus master IDE function and is not asso...

Page 52: ...C PCI DMA Acknowledge See Section 7 7 for a description GPIO 3 If the PC PCI request is not needed these can be used as general purpose inputs IRDY I O Initiator Ready IRDY indicates the 440MX s ability as an Initiator to complete the current data phase of the transaction It is used in conjunction with TRDY A data phase is completed on any clock when both IRDY and TRDY are sampled asserted During ...

Page 53: ...ATA_ I AC 97 Serial Data In Serial TDM data input IN 1 AC_SDATA_ O AC 97 Serial Data Out Serial TDM data output OUT AC_SYNC O AC 97 Sync 48 KHz fixed rate sample sync AC 97 Signal Description 2 of 2 Signal Type Description RTC Signal Description Signal Type Description RTCX1 Specia 32 KHz crystal Connected to the 32 768 KHz crystal If no external crystal is l used then RTCX1 can be driven with the...

Page 54: ... Once de asserted it must remain de asserted for at least four PCICLKs to allow the edge detect logic to PCIRST An external pullup should be placed on this signal if it is not used otherwise it is not always guaranteed to be driven EXSMI can cause an SERR if enabled This signal resides on the RESUME plane If EXSMI is not used this signal can be used as a GPIO LID GPIO 10 I I O Lid Input from the l...

Page 55: ...rd interrupt function is provided and this pin can be tied to the X bus connector When bit Signal Type Description 4 1 the mouse interrupt function is provided and this pin can be tied to the IRQ12 output of the keyboard controller When the mouse interrupt function is selected a low to high transition on this signal is latched by the 440MX and an INT is generated to the processor as IRQ12 An inter...

Page 56: ...cycles SA 18 0 are at an unknown state upon PCIRST DURING A DMA I O CYCLE THE ADDRESS BUS WILL BE DRIVEN TO 00H TO PREVENT OTHER I O DEVICES FROM FALSELY DECODING THE CYCLE During Reset High Z After Reset Undefined During POS Last Address SD 7 0 I O System Data Bus SD 7 0 provide the 8 bit data path for devices residing on the X bus The 440MX three states SD 7 0 during PCIRST SYSCLK O X Bus System...

Page 57: ...is power will not be shut off in low power states except for Mechanical Off V SS USB Ground for USB Note V CC SUS and V CC USB should both be on simultaneously Resume Power Pins Name Description V CC SUS 3 3V for Resume Well This power is not expected to be shut off unless the system is unplugged or the main battery is completely drained for a mobile system Note V CC SUS and V CC USB should both b...

Page 58: ...7338 FIR HDD FLASH 256KB SYSTEM BIOS KEYBOARD CONTROL H8_3834F KEY BOARD TOUCH PAD IDE X BUS MEM AC97 D D BD CLK SYN CKM100 ICS9248 101 HOST CLK PCI CLK 14 318MHz 48MHz PWR ON 5V_CD ADINP VMAIN 3V 5V 12V SDRAM 144 PINDIMM SOCKET ON BOARD SDRAM GEYSERVILLE VR_HI LO CD ROM Q_SW RJ45 LAN 10 100M RTL8139CL MDC MODEM ASKEY RJ11 SH7 SH24 USB1 D D BD CDROM BD USB2 USB3 SH3 4 SH9 D D BD SH10 LAN MDC BD SH...

Page 59: ...NTENANCE M722 N B MAINTENANCE 4 Switch Setting SW1 Country selection for internal keyboard SW1 PIN 1 4 Keyboard ON Janpan OFF USA SW1 SW2 SW3 J3 J1 J4 J5 J6 J7 SW4 SW5 SW6 J11 J10 J9 SW1 Country selection for internal ...

Page 60: ...ch Setting J504 J506 J507 J508 J509 VR50 1 J510 J505 SW501 SW502 J502 J503 J501 SW1 8 SW2 7 SW3 6 SW4 5 HYUNDAI HT12X11 100 SAMSUNG LTN121X1 L01 HITACHI TX31D70VC1CAA SANYO TM121XG 02L02 OFF OFF OFF OFF OFF ON ON ON ON ON ON ON X X X X LCD BRAND SELECT ...

Page 61: ...tem View and Disassembly 5 1 System View 5 1 1 Right Side View IR USB Port CD DVD ROM Drive Port Power Switch IR Port USB Port Power Connector 5 1 2 Left Side View Mini USB Port PC Card Slot RJ 45 connector RJ 11 connector IEEE 1394 Port Mini USB Port ...

Page 62: ...B MAINTENANCE 5 1 3 Rear View VGA Port Kensington Lock 5 1 4 Front View Volume Control Microphone Connector Audio Output Connector Mail Received Button Indicator Power Indicator Battery Charge Indicator Battery Indicators Cover Latch ...

Page 63: ...2 N B MAINTENANCE M722 N B MAINTENANCE 51 5 Bottom View CPU Cover Battery Pack RAM Board Slot Cover Reset Switch 5 1 6 Top Open View To open the cover press the cover latch toward the right and lift the cover ...

Page 64: ...63 M722 N B MAINTENANCE M722 N B MAINTENANCE LCD Display Microphone Keyboard Stereo Speaker Touchpad Indicators Panel Easy Start Buttons ...

Page 65: ...OTE Before you start to install replace these modules disconnect all peripheral devices and make sure the notebook is not turned on or connected to AC power 5 2 1 Battery Pack 5 2 2 CPU Modular Components 5 2 3 SO DIMM 5 2 4 ID Cover 5 2 5 Keyboard 5 2 6 LCD Assembly NOTEBOOK LCD Assembly Components 5 2 7 LCD Panel 5 2 8 Inverter Board 5 2 9 Hard Disk Drive 5 2 10 Touchpad Base Unit Components 5 2...

Page 66: ... the notebook upside down 2 Slide the battery lock level outward to the unlock position 3 Slide the battery release level outward to the unlock position and hold it in the unlock position and then you can remove the battery pack out of its compartment Battery Lock Level Battery Release Level ...

Page 67: ...nto the compartment The battery release level should click into the locked place 2 Slide the battery lock inward to the lock position to secure the battery pack in place 5 2 2 CPU Disassembly 1 Carefully put the notebook upside down 2 Remove two screws to lift the CPU compartment cover ...

Page 68: ...ve four screws that locking the spring holder then unplug the fan assembly s power cord to free the heatsink from the CPU module 4 Use a flat screwdriver to rotate the screw on the socket from L lock position to O open position and then take out the CPU ...

Page 69: ...tem board and fit the heatsink onto the top of the CPU 3 Fit the spring holder to the heatsink and secure with four screws in this order two center screws n first and then two outer screws o 4 Replace the CPU compartment cover and secure with two screws NOTE When you remove the CPU heatsink make sure the thermal pad is not damaged If it is damaged you have to replace the thermal pad with a new one...

Page 70: ...IMM o Reassembly 1 To install the SO DIMM match the SO DIMM s notched part with the socket s projected part and firmly insert the SO DIMM into the socket at 20 degree angle Then push down until the retaining clips lock the SO DIMM into position 2 Replace the compartment cover and secure with two screws ...

Page 71: ...ve five other screws that can be found on the bottom To avoid mistakes these holes are identified by a dot beside the screw hole 3 Put the notebook back to the upright position Open the top cover and tilt it backward until it lies flat To detach the ID cover first slightly lift the upper edge n and then slide it toward the front o 1 2 4 Disconnect the speaker cable from the system board ...

Page 72: ...ection 5 2 4 3 Put the notebook upside down Remove the SO DIMM compartment cover and then two screws that secure the keyboard one is in the compartment the other one is in the central position of the bottom 4 Put the notebook back to the upright position Lift up the keyboard and disconnect the cable to free it from the system board ...

Page 73: ...nect the speaker cable then replace the ID cover and secure with all bottom screws 3 Replace the battery pack 5 2 6 LCD Assembly Disassembly 1 Remove the battery pack See section 5 2 1 2 Remove the ID cover See section 5 2 4 3 Remove the hinge cover by inserting a flat screwdriver to the rear of the cover and pry the cover out ...

Page 74: ...nges Now you can separate the LCD assembly from the base unit Reassembly 1 Attach the LCD assembly to the base unit and secure with four screws on the hinges 2 Reconnect the LCD cable connectors to the system board 3 Replace the two hinge covers 4 Reconnect the speaker cable then replace the ID cover and secure with all bottom screws 5 Replace the battery pack ...

Page 75: ...ly 1 Remove the LCD assembly from the base unit See section 5 2 6 2 Remove the four rubber pads and the four screws underneath Then you can separate the LCD frame from the housing 3 To take out the LCD panel remove four screws and unplug the cable from the inverter board ...

Page 76: ...s 3 Replace the LCD assembly 5 2 8 Inverter Board Disassembly 1 Detach the LCD frame See steps 1 to 2 in section 5 2 7 Disassembly 2 To take out the inverter board at the bottom side of the LCD remove one screw and unplug the cable connected to the LCD panel Reassembly 1 Reconnect the cable then fit the inverter board back into place and secure with one screw 2 Fit the LCD frame back to the housin...

Page 77: ... section 5 2 1 2 Remove the ID cover See section 5 2 4 3 Lift up the touchpad board then remove the screw at the upper right corner of the touchpad holder Remove the screw at the upper right corner of the hard disk then slide the hard disk drive outward to unplug the connector and take out the hard disk drive ...

Page 78: ... with four screws 2 Fit the hard disk drive into place connect to the system board and secure with one screw at the upper right corner 3 Secure the screw at the upper right corner of the touchpad holder then fit the touchpad board into place and secure with double stick tape 4 Reconnect the speaker cable then replace the ID cover and secure with all bottom screws 5 Replace the battery pack ...

Page 79: ... 2 10 Touchpad Disassembly 1 Remove the battery pack See section 5 2 1 2 Remove the ID cover See section 5 2 4 3 Lift up the touchpad board and disconnect the cable from the system board 4 If you need to remove the touchpad holder remove two screws ...

Page 80: ...he speaker cable then replace the ID cover and secure with all bottom screws 4 Replace the battery pack 5 2 11 System Board Disassembly 1 Remove the battery pack See section 5 2 1 2 Remove the heatsink See steps 1 to 3 in section 5 2 2 Disassembly 3 Remove the ID cover See section 5 2 4 4 Remove the keyboard See section 5 2 5 5 Remove the LCD assembly See section 5 2 6 6 Remove the hard disk drive...

Page 81: ...D ROM transfer board into place and secure with four screws 2 Replace the touchpad and the hard disk drive 3 Attach the LCD assembly to the base unit and secure with four screws Replace the two hinge covers 4 Plug the keyboard cable and fit the keyboard back into place 5 Replace the heatsink 6 Reconnect the speaker cable then replace the ID cover and secure with all bottom screws 7 Replace the bat...

Page 82: ...ransfer board from the base See section 5 2 11 2 Put the system board upside down 3 Unplug the cables from the system board Reassembly 1 Reconnect the cables to the system board then fit the system board and CD ROM transfer board into place and secure with four screws 2 Replace the system board See section 5 2 11 Reassembly ...

Page 83: ...board from the base See section 5 2 11 2 Put the system board upside down 3 Remove two screws to lift the Modem LAN card Reassembly 1 Insert the connector of the Modem LAN card into the headers on the system board and secure it with two screws 2 Replace the system board See section 5 2 11 Reassembly ...

Page 84: ...tion 5 2 11 2 Put the system board upside down 3 Remove one screw on the board and two hexnut screws fastening the VGA port 4 Lift the DC DC board Reassembly 1 Insert the connector of the DC DC board into the header on the system board and secure it with three screws 2 Replace the system board See section 5 2 11 Reassembly ...

Page 85: ...If the error occurs before the message displayed on the screen If the error occurs before the display display is initialized then the screen cannot display the error message is initialized then the screen cannot display the error message Error Error codes or system beeps are used to identify a post error that occ codes or system beeps are used to identify a post error that occurs urs when the scre...

Page 86: ... Reset counter timer 1 exite the RAM 16h User register config through CMOS 18h Dispatch to 1st 64K RAM test 19h Checksum the ROM 1Ah Reset PIC s 8259s 1Bh Initialize video adapter s 1Ch Initialize video 6845 regs CODE DESCRIPTION 1Dh Initialize color adapter 1Eh Initialize monochrome adapter 1Fh Test 8237A page registers 20h Perform keyboard self test 21h Test initialize keyboard controller 22h Ch...

Page 87: ...s 3Fh OEM initialization of COMM and LPT ports 40h Configure the COMM and LPT ports 41h Initialize the floppies 42h Initialize the hard disk 43h OEM s init of PM with USB 44h Initialize additional ROMs 45h Update NUMLOCK status 46h Test for coprocessor installed 47h OEM s init of power management check SMI 48h OEM functions before boot PCMCIA CardBus 49h Dispatch to operation system boot 4Ah Jump ...

Page 88: ... N B MAINTENANCE M722 N B MAINTENANCE 5 A Maintenance Diagnostics 5 A 3 M722 Debug B D ERROR CODE Display M722 DEBUG B D M722 Motherboard Note The M722 Debug B D provide by Mitac Tssc If need please contact us ...

Page 89: ...O POWER 6 10 HARD DRIVE TEST ERROR 6 2 NO DISPLAY 6 11 USB PORT TEST ERROR 6 3 VGA CONTROLLER FAILURE 6 12 AUDIO FAILURE 6 4 LCD NO DISPLAY 6 5 EXTERNAL MONITOR NO DISPLAY 6 6 MEMORY TEST ERROR 6 7 KEYBOARD TEST ERROR 6 8 TRACK PAD TEST ERROR 6 9 CD ROM DRIVE TEST ERROR ...

Page 90: ...TENANCE M722 N B MAINTENANCE 6 1 NO POWER When the power button is pressed nothing happens power indicator does not light up Power Jack 22 5V 2 67A 1 Check AC Adaptor 2 Check D D Board OUTLET J7 D D BOARD MOTHER BOARD ...

Page 91: ... IN 5VTAP SENSE OUT F B ERR SHUTDN GND VMAIN SW_VDD5 FROM H8 VDD5 S G D SW_VDD5 5V F501 R198 0 U512 LP2951 02BM 8 2 7 3 6 1 5 4 X C287 4 7U Q22 Q25 DTC144WK 3 2 1 D S G 3 1 2 ADEN 47 DISCHARG_C BA2 1 4 5 6 7 8 2 3 J2 M722 M B 6 PF503 6 5A 32VDC PR11 301K PC11 0 1U 50V PR9 100K PU504 SI4435DY PR21 100K PR24 470K D BAT_V1 M722 D D BATTERY IN R80 38 D BAT_V1 ADAPTER IN PL512 120Z 100M D S G LEARNING ...

Page 92: ...ON MAIN BD PR7 PU1 PC506 PU506 PU507 PL501 PC506 ON D D BD PJ3 PL512 PF1 PC1 PR1 PD2 PU506 PD502 PL501 PU504 PR24 PR21 PQ1 PQ503 VMAIN 5V_P 12V Or 3V_P OK No Check following parts and signals PARTS SIGNAL ON D D BD PU503 PU1 PQ501 PL2 PD3 PU4 PQ501 PD5 PU502 PQ502 PD503 PD6 PD504 PL3 R508 PD503 PL507 U16 PL509 PL508 PL510 J501 ON MAIN BD U512 U16 R84 F501 D17 L14 Yes VCC_CORE OK No Check following...

Page 93: ... CARDBUS 21 12 25 U15 PC93338VJG SUPER I O 5 R191 HCLKMX M3 SDRMACLK1 U503 U504 U505 U506 U3 U4 U5 U6 AB25 R503 X501 C509 C508 XTALIN XTALOUT D1 E2 AC97_BITCLK 6 R618 AC97_BITCLK C1 AB4 18 U512 RAGE MOBILITY CTR PCLKVGA R543 J19 116 U20 PCI LAN RTL8139BL 45 U19 IEEE 1394 UPD72870 8 R540 157 PCLKLAN PCLK1394 29 49MHZ R542 PCICLK_F 7 R71 DCLKO DCLKIN R544 2 14MMX R534 48MHz_USB 26 R527 28 15 N1 R528...

Page 94: ... VDD5 H8_RESET 3 1 2 68 1 PWROK RESET PWROK CPURST PCIRST RST AC_RST RESET MR IDE_RST J6 1 HDD_RST HARD DRIVE CD ROM SW501 H8_MR RESET 4 3V R569 VDD5 H8_VDDA 59 9 4 37 36 PWRGDCPU VCC RST1 RST2 RSTDRV CPURST U20 LAN RTL 8139 RST 115 Q_IDE_RST 20 J510 PWRGDCPU U524 GCL W GEYSERVILLE POWERBT PWR_ON R84 R571 VTT Q37 G S D 3V RP519 41 9 U522 74CBTD3384 21 6 20 U19 IEEE 1394 UPD72870 5 SYSTEM RESET BUT...

Page 95: ... IRDY C BE 0 3 PAR P_REQ1 TRDY STOP P_GNT1 PCIINTA PIRQC AD20 U510 BANISTER RED GREEN BLUE DDCK DDDA HSYNC VSYNC 5V CRT_IN R32 10K C273 100P R28 1K M B J503 D D BD J501 D D BD J1 J2 ENABL_VGA BLADJ L1 L501 L2 5V_P RP520 SW502 1 8 3 4 7 6 2 5 HYUNDAI HT12X11 100 SAMSUNG LTN121X1 L01 HITACHI TX31D70VC1CAA SANYO TM121XG 02L02 SW1 8 SW2 7 SW3 6 SW4 5 OFF OFF OFF OFF OFF ON ON ON ON ON ON ON X X X X 3V...

Page 96: ... to the M B one at a time to find out which part is causing the problem YES NO YES NO Replace motherboard or into board level Troubleshooting YES Re soldering NO One of the following parts on the mother board may be defective use an oscilloscope to check the following signal or replace the parts one at a time and test after each replacement Parts ON M B U510 U507 J503 SW502 J2 D8 Q6 Q4 Q3 Signals ...

Page 97: ... U505 U506 J502 MA 0 9 MA10 MA13 MA 11 MA 12 SCAS SRAS MWEA DQMA 0 7 D_MD 0 63 MD 0 63 RP23 RP20 RP13 RP503 RP27 RP22 RP14 RP504 CS 2 3 CK 2 3 CS 0 1 CKE 0 1 SDRAMCLK 0 1 Either on board or extend SDRAM is failure or system hangs up 3V 3V SMBCLK1 U3 U4 U5 U6 MEM_MD 0 63 SMBDATA1 U508 ICS9248 SDRAMCLK 2 3 23 24 ...

Page 98: ...Test OK Correct it YES Board level Troubleshooting for Memory test error Check the following parts for cold solder or one of the following parts on the mother board may be defective use an oscilloscope to check the following signal or replace the parts one at a time and test after each replacement Parts U3 U6 U510 U503 U505 U508 RP23 RP20 RP13 RP503 RP27 RP22 RP14 RP504 J502 Signals MD 0 63 D_MD 0...

Page 99: ...doesn t work U16 H8 3434F KEYBOARD CONTROLLER KI 0 7 KO 0 15 J4 IOW IOR IRQ1 IRQ12 SD 0 7 H8_KBCS 3V RP57 U510 BANISTER KBD_US JP X2 16MHz TOUCH PAD MODULE SW2 SW3 T_DATA L20 L19 J5 R161 R162 5V C171 T_ CLK SW3 SW2 KO2 KO12 KI1 K12 K13 KI4 SW B D J1 L23 Quick Key Transfer B D 1 2 3 4 5 6 SW1 R134 U17 74CBTD 3384 97 96 53 54 2 3 KBCS 95 18 23 ...

Page 100: ... for K B or T P test error Check the following parts for cold solder or one of the following parts on the mother board may be defective use an oscilloscope to check the following signal or replace the parts one at a time and test after each replacement Parts U16 U516 R162 R161 RP57 SW1 L23 C171 R134 J4 J4 U17 J5 L20 L19 SW BD SW2 SW3 Signals KI 0 7 IOW KO 0 15 OR T_DATA IRQ1 T_CLK IRQ12 H8_KBCS SD...

Page 101: ...DEPDIOR IDEPDIOW IDEPDREQ IDE_D 0 15 IDEPIORDY IRQ14 PCS 1 3 IDEPA 0 2 PIRQ14 PDACK PIOR PIOW PDREQ IDEPD 0 15 PIORDY RP509 RP507 RP505 RP506 RP508 RP510 RP511 Q_IDEPD 0 15 Q_PDREQ Q_PIOW Q_PIOR Q_PDACK Q_IDEPA 0 2 Q_PCS 1 3 Q_IRQ14 74CBTD 3384 U520 U521 U522 Q_PIORDY 5V C608 L522 5V_CD CD_PWR J510 D S G Q505 R637 Q506 R243 12V VDD3 R552 IDE_RST Q_IDE_RST R636 VDD3 CDROM_PLUG D S G 5V_HDD Q31 ...

Page 102: ...roubleshooting Correct It then end Board level Troubleshooting for CD ROM drive test error Check the following parts for cold solder or one of the following parts on the mother board may be defective use an oscilloscope to check the following signal or replace the parts one at a time and test after each replacement Parts U516 U520 U521 U522 RP509 RP507 RP505 RP508 RP510 RP511 Q505 Q506 R637 R243 L...

Page 103: ...ting data is to hard drive CABLE HARD DRIVE U516 BANISTER J6 IDE_CS 1 3 IDE_A 0 2 IRQ14 IDEPDACK IDEPDIOR IDEPDIOW IDEPDREQ IDE_D 0 15 IDEPIORDY 5V PCS 1 3 PIRQ14 PDACK PIOR PIOW PDREQ IDEPD 0 15 PIORDY R553 RP509 RP507 RP506 RP508 RP510 RP51 IDE_RST IDEPD7 R177 IDEPA 0 2 HDD_PWR 5V_HDD R186 R202 PIOCS16 5V C222 L31 5V_HDD D S G Q30 R223 Q32 R246 12V VDD3 D S G 5V_HDD Q31 R552 ...

Page 104: ... following parts on the mother board may be defective use an oscilloscope to check the following signal or replace the parts one at a time and test after each replacement Parts U516 J6 RP509 RP507 RP505 RP506 RP508 RP510 RP511 Q31 Q30 Q32 L31 R223 R246 C222 R186 Signals IDED 0 15 IDEPA 0 2 PCS 1 3 PIOW PIOR PIRQ14 PDREQ Re boot OK Correct it then end YES NO Check if HDD s cable installed to HDD an...

Page 105: ...P502 L1 USB_GND3 GND JS2 JS1 L4 L3 5V 20 19 16 15 11 18 12 14 10 USBPD1 USBPD1 USBHUB_OC 3 USBHUB_OC 2 USBHUB_OC 1 5 4 6 3 1 8 2 7 F1 C4 R2 R1 C502 L3 C1 J501 7 2 8 1 3 6 4 5 F504 R608 R621 C601 C568 C585 L513 J509 5V F502 R603 R602 C573 C557 C554 L507 J505 U519 TUSB2036 J10 R159 J501 C3 L3 C8 R503 R502 C502 F501 J3 USB_OC 0 ON D D B D RP514 1 2 3 4 1 2 3 4 8 7 6 5 8 7 6 5 RP515 USBP1 USBP1 HUB_SU...

Page 106: ...er board may be defective use an oscilloscope to check the following signal or replace the parts one at a time and test after each replacement Parts ON M B U510 U519 R555 R556 R567 R568 R601 R595 RP514 RP515 X505 R701 C701 C702 CP502 CP501 RP516 RP517 F504 L513 R608 R621 C568 C585 L511 L510 L508 C581 C575 L509 F1 L2 R2 R1 C4 C502 C1 L3 L4 Signals ON M B ON D D B D USBP1 USBPD0 USBP1 USBPD0 USBP0 U...

Page 107: ...5 CS4299 J512 CDROM_R CDROM_L C563 C232 R651 R653 R656 CDROM_RIGHT CDROM_ LEFT U510 BANISTER AC97_SDIN0 AC97_BITCLK AC97_RESET C600 L42 J11 INTERNAL MIC1 L41 L29 L517 AUDIO IN R560 R611 C263 R623 R618 C604 CDROM_PLUG 3V CDROM_COMM C239 R655 JO502 R652 CD_CDROM CDROM CONNECTOR C562 R230 C268 C267 JS26 VA 5V R654 R636 21 20 18 19 11 5 8 10 R606 L512 6 ...

Page 108: ...TCLK 11 5 8 10 6 R611 AC 97 CODEC LINK 7 9 AUDIO FAILURE No sound from speaker after audio driver is installed SPK_OFF AUDIO OUT R560 19 10 5V_AMP 5V_AMP 22 Drive IC LED 5 4 2 3 1 8 9 7 13 15 5V_AMP 5V L520 L519 L515 L516 L36 L514 L32 R617 R232 J10 3V R609 Q34 R231 Q35 L33 3V C582 C570 24 5 U24 LM4834 SPEAKER SPEAKER J9 27 2 DEVICE DECT DECT HP OPT HP SENSE Q504 5V_AMP 16 R667 VR501 C602 L512 R606...

Page 109: ... HP_LEFT SPK_OFF 1 If no sound cause of line out check the following parts signals 2 If no sound cause of MIC check the following parts signals 3 If no sound cause of CD ROM check the following parts signals Parts U25 C562 L517 C600 C599 L29 MIC1 J11 L42 C277 Signals MIC1 Parts U25 C563 C232 C239 J510 Signals CDROM_L CDROM_R CDROM_COMM AUDIO DRIVE FAILURE 1 Check if speaker cables are connected pr...

Page 110: ... MQ_IDEPD1 MCD_LED MQ_PIRQ14 MQ_IDEPD10 MCDROM_LEFT MQ_IDEPD13 MQ_IDEPD7 MQ_IDEPD2 MQ_PCS1 MQ_PIORDY MQ_PCS3 MQ_IDEPDIAG MGND 5V_MCD MGND 5V_MCD MGND MGND 5V_MCD1 5V_MCD MGND MGND MGND 5V_MCD1 MGND MGND R647 10K NA 0603 1 2 R648 470 0603 1 2 R649 100 0603 1 2 C139 2200P NA 0603 1 2 C176 2200P NA 0603 1 2 MTG21 ID2 8 OD5 0 MTG110_RD197 1 L40 120Z 100M 2012 1 2 C276 10U 10V 1210 1 2 C621 0 01U 0603 ...

Page 111: ...ITAC INTERNATIONAL CORP Address 4F NO 18 PU DING ROAD HSINCHU TAIWAN R O C TEL 886 3 5645850 Fax 886 3 5781245 Second Edition Mar 2001 E mail Jesse Jan mic com tw SERVICE MANUAL TROUBLESHOOTING GUIDE FOR M722 SERVICE MANUAL TROUBLESHOOTING GUIDE FOR SERVICE MANUAL TROUBLESHOOTING GUIDE FOR M722 ...

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