Text preview for : 09130-90030_9130K_Service_Jul81.pdf part of HP 09130-90030 9130K Service Jul81 HP disc 09130-90030_9130K_Service_Jul81.pdf
Back to : 09130-90030_9130K_Service | Home
~=========== SERVICE MANUAL
HP 9130K
Flexible Disc Drive
Service Documentation
Hewlett-Packard Greeley Division
3404 East Harmony Road, Fort Collins, Colorado 80525
ii
Table of Contents
Chapter 1: General Information
Introduction .............................................................. 1-1
General Description ....................................................... 1-1
Available Options ...................................................... 1-2
Environmental and Physical Specifications .................................... 1-2
Recording Specifications ................................................ 1-2
Environmental Specifications ............................................ 1-2
Physical Dimensions and Weight ......................................... 1-3
Performance Specifications .............................................. 1-3
Flexible Disc Media Use .................................................... 1-4
Intro.duction .......................................................... 1-4
Operating Cleanliness .................................................. 1-5
Handling Discs ........................................................ 1-5
Do .................................................................. 1-6
Don't ................................................................ 1-7
Write Protection ....................................................... 1-9
Chapter 2: Interface Information
Introduction .............................................................. 2-1
Interface ............................................................. 2-1
Primary Power Requirements ............................................ 2-1
Signal Line Description .................................................... 2-3
Input Control Lines .................................................... 2-3
Output Status Lines .................................................... 2-4
Typical Interface Drive/Receiver Circuit ....................................... 2-8
Chapter 3: Theory of Operation
Introduction .............................................................. 3-1
Flexible Disc Recording Fundamentals ...................................... 3-1
Index Pulse Shaping Network ................., ........................... 3-3
Write Protect Sensor ....................... " ........................... 3-3
Track 0 Switch ............................ , ........................... 3-3
Spindle Motor Drive Control ............................................. 3-3
Head Position Control .................................................. 3-4
Power On Circuit ...................................................... 3-4
Data Circuitry ......................................................... 3-4
Writing Data .......................................................... 3-4
Reading Data ......................................................... 3-7
iii
Chapter 4: Assembly Access
Introduction .............................................................. 4-1
Chapter 5: Maintenance
Introduction .............................................................. 5-1
Service Kit Contents .................................................... 5-1
Drive Failure Analysis .................................................. 5-2
Head Cleaning ................................................... " .... 5-3
Termination Resistor IC U2F ............................................. 5-3
Shunt Block U1E ...................................................... 5-3
Alignment and Adjustments ................................................. 5-3
Introduction ..................................................... , .... 5-3
Spindle Motor Speed Adjustment .................................... , .... 5-3
Spindle Drive Belt Adjustment ........................................... 5-4
Radial Head Alignment ................................................. 5-7
Head Azimuth Alignment ................................................ 5-8
Track 0 Switch Adjustment .............................................. 5-9
Index Emitter/Detector Adjustment ...................................... 5-10
Write Protect Switch Adjustment ........................................ 5-12
Read/Write Test ...................................................... 5-12
DSU Controls and Indicators ........................................... 5-13
Disc Service Unit Operation ............................................ 5-16
Packaging Instructions ................................................. 5-17
Test Point Location and Waveforms ...................................... 5-19
Chapter 6: Schematic Diagrams
Introduction .............................................................. 6-1
Chapter 7: Replaceable Parts
Introduction .............................................................. 7-1
Figures
1-1 Physical Dimensions ................................................. 1-4
1-2 Head/Media Critical Requirements ...................................... 1-6
1-3 Damaged Media ..................................................... 1-8
1-4 Loading the Disc .................................................... 1-9
1-5 Write Protect Tab Installation .......................................... 1-9
2-1 Connector J2 Pin Out ................................................ 2-1
2-2 Connector J1 Pin Out (Circuit Side) .................................... 2-2
2-3 General Control and Data Requirements ................................. 2-5
2-4 Connector Location ................................................... 2-6
2-5 Connector J4 Pin Out ................................................ 2-6
iv
2-6 Connector J3 Pin Out ................................................ 2-7
2-7 Servo Electronics Board Jl ............................................ 2-8
2-8 Typical Interface DriverlReceiver Circuit ................................. 2-9
3-1 ID and Data Field Content ............................................ 3-1
3-2 Media Sector and Track Structure ...................................... 3-2
3-3 Head Positioning Assembly ............................................ 3-3
3-4 9130K Functional Block Diagram ....................................... 3-5
3-5 Write Timing Diagram ................................................ 3-6
3-6 Read Timing Diagram ................................................ 3- 7
4-1 9130K Flexible Disc Drive Exploded View ............................... 4-2
4-2 Drive Board and Servo Board Removal .................................. 4-3
4-3 Front Panel and Latch Removal ........................................ 4-4
5-1 Spindle Motor Speed Adjustment ....................................... 5-4
5-2 Spindle Drive Belt Adjustment ......................................... 5-5
5-3 9130K Test Setup ................................................... 5-6
5-4 Radial Head Alignment Waveform ...................................... 5-7
5-5 Head Assembly Retaining Screws ....................................... 5-8
5-6 Head Azimuth Waveform ............................................. 5-9
5- 7 Track 0 Switch Retaining Screw ........................................ 5-9
5-8 Track 0 Waveform .................................................. 5-10
5-9 Index Detector Retaining Screw ....................................... 5-11
5-10 Index to Burst Waveform ............................................ 5-12
5-11 Write IF Waveform ................................................. 5-13
5-12 Write 2F Waveform ................................................. 5-13
5-13 DSU Controls and Indicators ......................................... 5-14
5-14 9130K/DSU Test Setup .............................................. 5-16
5-15 Foam Latch Insert .................................................. 5-17
5-16 Inner Box ......................................................... 5-18
5-17 Foam End Caps .................................................... 5-18
5-18 Outer Box ......................................................... 5-19
5-19 Test Point Locations (09130-66501) ................................... 5-19
5-20 Test Point Locations (82901-66515) ................................... 5-20
6-1 Drive Electronics Board PIN 09130-66501 Schematic Diagram .............. 6-3
6-2 Drive Electronics Board PIN 82901-66515 Schematic Diagram .............. 6-5
6-3 Servo Electronics Board PIN 09130-66500 Schematic Diagram .............. 6-9
6-4 Servo Electronics Board Component Locator ............................ 6-11
6-5 Drive Board PIN 82901-66515 Component Locator ...................... 6-12
6-6 Drive Board PIN 09130-66501 Component Locator ...................... 6-13
Chapter 1
General Information
Introduction
This service manual provides detailed information for servicing the 9130K disc drive.
Service Philosophy
The 9130K Flexible Disc Drive is comprised of three serviceable areas: the mechanical drive
assembly, the drive electronics assembly and the servo electronics assembly. All assemblies
are serviced on the exchange program with the exception of some parts on the mechanical
assembly. The field replaceable parts are outlined in the maintenance and assembly access
sections.
General Description
The HP 9130K rnini double sided flexible disc drive is a semi-random access mass storage
system employing a flexible magnetic medium. It consists of a mini disc drive, a servo
electronics circuit board and a drive electronics circuit board.
Each drive module contains all the mechanical parts necessary for physically handling the
disc. These include the drive spindle and motor, 2 heads each having read/write and erase
capability, write protect sensor, track 0 sensor, index sensor, and activity LED on the front
panel. Each drive module also contains a servo control board which controls the DC drive
motor speed and a drive electronics board which interprets and generate control signals,
controls movement of the read/write head to the correct position, and also reads and writes
data.
The flexible magnetic medium used in the 9130K is called a flexible disc. The flexible disc
measures 133.4 mm (5.25 inches) on a side and has a 3.8 cm (1.5 inch) hole for alignment
on the disc drive spindle. The disc is enclosed in a protective polyvinylchloride (PVC) jacket
with a slot for access to the recording surface. Both sides of the flexible disc are used for data
storage.
The recording head in the drive module is positioned by a mechanism driven by a stepper
motor and taut metal band. The head positioning mechanism operates in an open loop
configuration, that is, there is no feedback to the drive electronics board to determine the
actual position of the head.
The heads are mechanically coupled to the door mechanism so that closing of the door
causes the heads to make contact with the media.
1-2 General Information
Available Options
The following options are available with the 9130K flexible disc drive:
Option #010
This option consists of drive board PIN 09130-66501.
Option #011
This option consists of drive board PIN 82901-60015 found in the 8290X series drives.
Option #050
This option consists of the mechanical drive assembly with servo board and front panel PIN
4040-1838 and latch PIN 4040-1836 and associated hardware.
Option #051
This option consists of the mechanical drive assembly with servo board and front panel PIN
4040-1915 and grey latch PIN 4040-1914 and associated hardware.
Option #052
This option consists of the mechanical drive assembly with servo board and front panel PIN
4040-1915 and brown latch PIN 4040-1913 and associated hardware.
Environmental and Physical Specifications
Recording Specifications
HP Physical Track Format
Recordng Mode: Modified Frequency Modulated (MFM)
Rotational Speed: 300 RPM