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IBM 19K1902 Service Manual

Speaker/usb hub
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MODEL: IBM T860 SPEAKER / USB HUB (19K1901)
IBM T860 SPEAKER / USB HUB (19K1902)
SERVICE MANUAL
CAUTION
BEFORE SERVICING THE UNIT,
READ THE SAFETY PRECAUTIONS
IN THIS MANUAL.

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  Summary of Contents for IBM 19K1902

  • Page 1 MODEL: IBM T860 SPEAKER / USB HUB (19K1901) IBM T860 SPEAKER / USB HUB (19K1902) SERVICE MANUAL CAUTION BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
  • Page 2: Table Of Contents

    CONTENTS SPECIFICATIONS ........... 2 PRINTED CIRCUIT BOARD........13 PRECAUTIONS ............3 EXPLODED VIEW...........16 OPERATING INSTRUCTIONS ........ 4 REPLACEMENT PARTS LIST .......18 BLOCK DIAGRAM ........... 7 PIN CONFIGURATION..........20 DESCRIPTION OF BLOCK DIAGRAM.....8 SCHEMATIC DIAGRAM ......... 21 TROUBLESHOOTING GUIDE ........ 9 SPECIFICATIONS 1.
  • Page 3: Precautions

    If the wires are pressed cause short and may • Do not modify original design without obtaining written burn or take fire. permission from IBM or you will void the original parts and labor guarantee. TAKE CARE DURING HANDLING THE LCD MODULE WITH BACKLIGHT UNIT.
  • Page 4: Operating Instructions

    OPERATING INSTRUCTIONS Rear Control Panel Side Jacks 1. Microphone Jack An external microphone can be used instead of the preinstalled microphone. 2. Headphone Jack A headphone jack that automatically mutes the speaker volume when headphones plugged in. Rear Panel Jacks 3.
  • Page 5 USB Control Panel Side Jacks USB HUB Jacks External USB 1.1 low power devices such as keyboards and mouse can be connected to these ports. Rear Jack USB Devices Jack Connects the USB HUB to the computer system Downstream port. Universal Serial Bus (USB) is an innovation that conveniently connects different devices to your computer.
  • Page 6 Using the USB (Universal Serial Bus) HUB Featuers Connecting USB devices 1. Insert the USB cable into the square USB connector of the Speaker/USB HUB Option as shown is the diagram on the left. Then, insert the other end of the USB cable into the rectangular USB connector on a USB-compliant computer or USB hub as shown in the diagram on the right.
  • Page 7: Block Diagram

    BLOCK DIAGRAM - 7 -...
  • Page 8: Description Of Block Diagram

    DESCRIPTION OF BLOCK DIAGRAM 1. USB(Universal Serial Bus) Circuit This circuit consists of USB hub IC(TUSB2046B), and over voltage protector IC(TPS2042ADR). This circuit is used to expand four ports of down stream for your easy using of low power device such as keyboard, mouse and etc.
  • Page 9: Troubleshooting Guide

    TROUBLESHOOTING GUIDE 1. AUDIO NO POWER POWER INDICATOR OFF CHECK TROUBLE BUILT 12V DC? IN POWER CHECK TROUBLE IN CHECK U5 OUTPUT VR1? (5V) ? TROUBLE IN U5 CHECK Q1,Q2 ? TROUBLE IN Q1, Q2 TROUBLE IN LED1 - 9 -...
  • Page 10 2. NO VOLUME CONTROL CHECK TROUBLE IN U5 (5V)? CHECK VR1? TROUBLE IN VR1 TROUBLE IN U3 TROUBLE IN R3, R6, R9 3. AUDIO NO OUTPUT CHECK TROUBLE CHECK U3 PIN 4, 9 IN U3 J4 AND PC? AUDIO IN? CHECK CHECK TROUBLE...
  • Page 11 4. USB NO OPERATING CHECK TROUBLE IN J106 PIN1? CHECK TROUBLE IN L102, L103 L102, L103 CHECK U101 OUTPUT TROUBLE IN U101 (3.3V)? CHECK TROUBLE IN X101 X101? CHECK TROUBLE IN U103 U103? - 11 -...
  • Page 12 CHECK TROUBLE IN U110 U110? TROUBLE IN CHECK J101, J104 J101, J104? TROUBLE IN DEVICE - 12 -...
  • Page 13: Printed Circuit Board

    PRINTED CIRCUIT BOARD 1. AUDIO BOARD - 13 -...
  • Page 14 2. USB WAFER BOARD (Component Side) J101 J106 J104 C116 C117 3. USB WAFER BOARD (Solder Side) R106 R110 MODEL:SPT860(USB) P/N :6870T484U11 DATE :2002.04.16 - 14 -...
  • Page 15 4. USB HUB BOARD (Component Side) R129 R124 C127 C120 U103 X101 J102 5. USB HUB BOARD (Solder Side) MODEL:SPT860(USB) P/N :6870T483U11 U110 DATE :2002.04.16 - 15 -...
  • Page 16: Exploded View

    EXPLODED VIEW - 16 -...
  • Page 17 CABLE, D-SUB, UL20276 #30 DT 3000MM BLACK(9930) LI884E GM 1SZZTMT003A SCREW, DRAWING, D3.0 L10.0 MSWR/FZMCW1 LI884E -(19K1901) Stealth Black 1SZZTMT003B SCREW, DRAWING, D3.0 L12.0 MSWR/FZMCW1 LI884E(P/W) -(19K1902) Pearl White 332-113S SCREW, DRAWING, D3.0 L12.0 MSWR/BK -(19K1901) Stealth Black 332-113N SCREW, PVP+3*12 MSWR/FZMW -(19K1902) Pearl White...
  • Page 18: Replacement Parts List

    REPLACEMENT PARTS LIST CAUTION: BEFORE REPLACING ANY OF THESE COMPONENTS, READ CAREFULLY THE SAFETY PRECAUTIONS IN THIS MANUAL. * NOTE SAFETY Mark AL ALTERNATIVE PARTS DATE: 2002. 04. 23. DATE: 2002. 04. 23. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC.
  • Page 19 DATE: 2002. 04. 23. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION 0CC121CK41A 120PF 1608 50V 5% R/TP NP0 0CC121CK41A 120PF 1608 50V 5% R/TP NP0 0CH3105F946 1UF 16V Z F 2012 R/TP 0CK104CK56A 0.1UF 1608 50V 10% R/TP X7R 0CK104CK56A 0.1UF 1608 50V 10% R/TP X7R 0CH3105F946...
  • Page 20: Pin Configuration

    PIN CONFIGURATION TDA7496L SGS-THOMOSN 2W+2W AMPLIFIER WITH DC VOLUME CONTROL Pin Configuration PIN CONNECTION OUTL VAROUT_L VOLUME VAROUT_R OUTR N.C. MUTE STBY Powerdip(14+3+3) ORDERING NUMBER: TDA7496L D97AU597A BLOCK DIAGRAM VAROUT_R 15,16 1,2,3,13, 18,19,20 VOLUME 1000m F 470nF OUTR OP AMP S1 ST-BY STBY S_GND...
  • Page 21: Schematic Diagram

    SCHEMATIC DIAGRAM 1. AUDIO - 21 -...
  • Page 22 2. USB WAFER - 22 -...
  • Page 23 3. USB HUB - 23 -...
  • Page 24 Apr. 2002 Printed in Korea P/NO : 3828TSO049B...

This manual is also suitable for:

19k1901T860