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IBM 19K1902, Service Manual, Page: 10 / 24

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IBM 19K1902 Service Manual Download Page 10

- 10 -

2. NO VOLUME CONTROL

TROUBLE IN R3, R6, R9

NO

NO

TROUBLE IN VR1

TROUBLE IN U3

YES

YES

CHECK

VR1?

3. AUDIO NO OUTPUT

TROUBLE IN SPEAKER

TROUBLE IN U5

NO

YES

YES

CHECK

U3 OUTPUT

PIN 14, 17 ?

CHECK

U5

(5V)?

TROUBLE
IN U3

NO

YES

CHECK 

U3 PIN 4, 9

AUDIO IN?

CHECK 

J4 AND PC?

TROUBLE
IN U3

NO

YES

CHECK 

U3 PIN 11, 12

(0V) ?

Summary of Contents for 19K1902

Page 1: ...SERVICE MANUAL CAUTION BEFORE SERVICING THE UNIT READ THE SAFETY PRECAUTIONS IN THIS MANUAL MODEL IBM T860 SPEAKER USB HUB 19K1901 IBM T860 SPEAKER USB HUB 19K1902 ...

Page 2: ...am port 4Downstream ports 3 POWER SUPPLY Power Input DC 12V 0 5A 4 ENVIRONMENT 4 1 Operating Temperature 10 C 35 C 50 F 95 F 4 2 Relative Humidity 10 80 Non condensing 5 DIMENSIONS with TILT SWIVEL Width 397 mm 15 62 Depth 49 4 mm 1 94 Height 63 5 mm 2 50 CONTENTS SPECIFICATIONS 2 SPECIFICATIONS 2 PRECAUTIONS 3 OPERATING INSTRUCTIONS 4 BLOCK DIAGRAM 7 DESCRIPTION OF BLOCK DIAGRAM 8 TROUBLESHOOTING...

Page 3: ... as pencil or pen as this may result in damage to the panel Protect the module from the ESD as it may damage the electronic circuit C MOS Make certain that treatment person s body are grounded through wrist band Do not leave the module in high temperature and in areas of high humidity for a long time The module not be exposed to the direct sunlight Avoid contact with water as it may a short circui...

Page 4: ...e the provided Microphone extender cable pink connectors to plug into the rear of the Speaker USB HUB Option MIC OUT and into the MIC input jack of your sound card if available A microphone that meets the requirements defined for your sound card can then be plugged into the MIC jack on the side of the Speaker USB HUB Option Audio Input The Audio Input on the back of the Speaker USB HUB Option shou...

Page 5: ...SB connection You can hot plug USB devices that is you can attach the devices while the computer is on You can also disconnect USB devices while maintaining Plug and Play auto detection and configuration This monitor comes with an integrated BUS power USB HUB that can have up to four other USB devices attached to it The Speaker USB HUB Option has an integrated BUS powered HUB that meets the USB 2 ...

Page 6: ...ther hub cable This is a simplified representation of the rear view This is a simplified representation of the side view Notes To activate the USB hub function the Speaker USB HUB Option must be connected to a USB compliant computer OS or another hub with the USB cable enclosed When connecting the USB cable check that the shape of the connector at the cable side matches the shape at the connecting...

Page 7: ...er USB 1 Up 4 Down From Main 12V Audio Amp TDA7496L Audio Input Signal R L 700mVrms DC Volume Control Power On Off LED Speaker R Out Speaker L Out Speaker R Speaker L Head Phone R Head Phone L Mic In PC Mic Jack From PC 5V D S 2 From Main 12V BLOCK DIAGRAM ...

Page 8: ...ecification for Full Speed Devices allowing up to 4 low power USB devices to be attached 2 Audio Circuit This circuit supports speaker output of 1W 1W Right Left Main amp TDA7496L amplifies input audio signal and has function of volume control and Shutdown Volume On Off Up Down Control varies the volume of sound going to the speakers and headphone jack and uses to turn on off audio When headphone ...

Page 9: ...NG GUIDE 9 1 AUDIO NO POWER POWER INDICATOR OFF TROUBLE IN LED1 TROUBLE BUILT IN POWER NO TROUBLE IN VR1 TROUBLE IN U5 NO NO TROUBLE IN Q1 Q2 NO YES YES YES YES CHECK U5 OUTPUT 5V CHECK VR1 CHECK 12V DC CHECK Q1 Q2 ...

Page 10: ...TROUBLE IN VR1 TROUBLE IN U3 YES YES CHECK VR1 3 AUDIO NO OUTPUT TROUBLE IN SPEAKER TROUBLE IN U5 NO YES YES CHECK U3 OUTPUT PIN 14 17 CHECK U5 5V TROUBLE IN U3 NO YES CHECK U3 PIN 4 9 AUDIO IN CHECK J4 AND PC TROUBLE IN U3 NO YES CHECK U3 PIN 11 12 0V ...

Page 11: ...B NO OPERATING TROUBLE IN PC TROUBLE IN L102 L103 NO NO TROUBLE IN U101 NO YES YES YES CHECK L102 L103 CHECK J106 PIN1 CHECK U101 OUTPUT 3 3V TROUBLE IN X101 NO YES CHECK X101 TROUBLE IN U103 NO YES CHECK U103 ...

Page 12: ... 12 TROUBLE IN U110 NO TROUBLE IN J101 J104 TROUBLE IN DEVICE NO YES YES CHECK U110 CHECK J101 J104 ...

Page 13: ...R10 R11 Q2 R12 C4 R6 R7 R9 R13 R3 C2 VR1 J9 J3 J8 C24 R17 C25 R18 R15 C29 C18 L1 J7 C11 C38 U3 D3 C40 D6 R5 D2 C31 R30 R20 D5 R14 C19 C32 R23 C30 R29 C9 C12 J4 C23 L2 J1 U5 C26 C8 C5 C37 C36 C6 C7 ZD2 L3 C1 R8 R1 MODEL LI884E AUDIO DATE 2002 04 18 P N 6870T482S11 J5 ...

Page 14: ...104 ZD106 ZD105 ZD110 ZD108 J101 J104 3 USB WAFER BOARD Solder Side R125 R126 R103 R102 R111 R108 R115 MODEL SPT860 USB DATE 2002 04 16 P N 6870T484U11 L103 C103 R106 R104 R101 R109 R110 R112 R107 R105 R113 R114 R116 L102 C101 C102 C109 C104 L104 L101 L108 L107 C110 C106 C105 L106 L105 L112 L113 C111 C113 ...

Page 15: ...HUB BOARD Component Side 15 C120 L114 16 R124 C114 L115 C127 R119 D111 R129 U103 R120 C118 1 C121 2 J102 X101 5 USB HUB BOARD Solder Side C115 U110 MODEL SPT860 USB P N 6870T483U11 C119 L118 R118 DATE 2002 04 16 ...

Page 16: ... 16 EXPLODED VIEW 1 8 7 11 2 6 5 4 a b 9 10 3 ...

Page 17: ...OB LI884E CONTROL VOLUME 19K1901 Stealth Black KNOB LI884E CONTROL VOLUME 19K1902 Pearl White PWB PCB ASSEMBLY SUB LI884E SOUND TOTAL IBM CL 29 T860 SPEAKER ASSEMBLY LI884E 18 1 LCD METAL FIX SPEAKER LM568E PWB PCB ASSEMBLY USB LI884E SUB TOTAL IBM CL 29 T860 CORD A V A V KHC ST 3 002 UL 2851 28 2C 3000MM BLACK 9930 CORD A V A V KHC ST 3 0003 UL 2851 28 2C 3000MM BLACK 9930 CORD LINE DC CABLE UNIX...

Page 18: ...02 04 23 S AL LOC NO PART NO DESCRIPTION SPECIFICATION L114 6210TCE001B HH 1H3216 500JT CERATEC 3216 L115 6210TCE001P HB 1S2012 121JT CERATECH 201 L118 6210TCE001P HB 1S2012 121JT CERATECH 201 R101 0RJ1502D677 15K OHM 1 10 W 5 1608 R TP R102 0RJ0222D677 22 OHM 1 10 W 5 1608 R TP R103 0RJ0222D677 22 OHM 1 10 W 5 1608 R TP R104 0RJ1502D677 15K OHM 1 10 W 5 1608 R TP R105 0RJ1502D677 15K OHM 1 10 W 5...

Page 19: ...677 5 1K OHM 1 10 W 5 1608 R TP R10 0RJ3602D677 36K OHM 1 10 W 5 1608 R TP R11 0RJ1502D677 15K OHM 1 10 W 5 1608 R TP R12 0RH0000D622 0 1 10W P TYPE TAPPING R13 0RJ5602D477 56K OHM 1 10 W 1 1608 R TP R14 0RJ1000D677 100 OHM 1 10 W 5 1608 R TP R15 0RJ1000D677 100 OHM 1 10 W 5 1608 R TP R17 0RJ0471D677 4 7 OHM 1 10 W 5 1608 R TP R18 0RJ0471D677 4 7 OHM 1 10 W 5 1608 R TP R20 0RJ3602D677 36K OHM 1 10...

Page 20: ... OUTR VS VS OUTL GND GND GND 20 19 18 17 16 14 15 13 12 D97AU597A SVR 10 STBY 11 PIN CONNECTION VOLUME OP AMP MUTE STBY PROTECTIONS 9 470nF INR 30K VOLUME OP AMP 30K 1000m F 1000m F 1m F 10K 4 470nF INL 7 14 11 12 17 6 5 300K 100nF VOLUME VAROUT_L OUTR STBY MUTE OUTL 1 2 3 13 18 19 20 GND 470m F SVR 10 D97AU596A VS VAROUT_R 15 16 5V S1 ST BY 5V S2 MUTE 5V S_GND 60K BLOCK DIAGRAM Pin Configuration ...

Page 21: ...SCHEMATIC DIAGRAM 21 1 AUDIO ...

Page 22: ... 22 2 USB WAFER ...

Page 23: ... 23 3 USB HUB 1 ...

Page 24: ...Apr 2002 Printed in Korea P NO 3828TSO049B ...

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