Panasonic JB-3300 Quick start guide

Technical Guide
Portable Computer
JB-3300
ae . e .
Panasonic
Matsushita
Electric
Trading
Co.,
Ltd

PREFACE
This Technical Guide contains a detailed explanation of the operation of the CPU
module, the floppy disk controller, display/keyboard, disk drives, and power
supplies for the computer. General checkout procedures to aid you in tracing
problems to a specific subassembly or PC board but no further are included.
Information on the hard disk controller board, floppy disk drive, and hard disk
drive is also provided. In addition, you will find data sheets for several of
the integrated-circuit chips used in this computer.
This guide limits repair procedures to replacement of subassemblies only. A
parts list containing part numbers for major subassemblies may be found in
Section 1, item 8. Additionally, a detailed parts list for each subassembly
may be found at the end of each section. Using the part numbers, you can order
the major subassemblies and some components through your Panasonic Service
Office. |
To aid you in recognizing problem areas, we recommend that you obtain a
diagnostics disk and an RS-232C loop-back plug from the Panasonic Service Office.
If you have any problems with the computer, contact the service office.

IMPORTANT NOTICE
This Technical Guide is written for engineers who have a thorough understanding
of electronics and computer circuitry and who are authorized to repair the
computer. It is not intended for the beginner.
If an unauthorized person should use this guide to repair, modify, or alter the
computer, Panasonic cannot be held responsible or liable for any damage caused or
alleged to be caused. We strongly suggest that for proper servicing, the
computer be returned to Panasonic.
Documentation Map
For Specialists For Users
JB-3300
Portable Computer
User's Manual
Service Manual
(For Field Service - Unit
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JB-3300
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Hard
Disk
Drive,
Floppy
Reference
Guide
Disk
Drive,
LSI
Module
for
Users
MS-DOS Manual
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Basic Reference
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CONTENTS
I. GENERAL
SPECIFICATIONS 2... ccc ccc ccc cece crc ence cece svc csccccee wcrc cece eee e neces I-1l
1.1 LOGIC UNit cece ccc cc cc ccc ww cc cer er wre ccc ce cece ee ee cece cee eee cceces I-1
1.2 Plasma Display ccc cee ccc ccc ccc ccc ccc ccc essence cscs cece ccccens I-2
1.3 Floppy Disk DYivVe 2... cc ccc cc ce we ec ccc cece w ccc e meee eee ec eee nces I-2
1.4 Hard Disk Drive (Hard Disk VerSion) 2... cc ccc ccc cw we cc ec cece I-3
1.5 Keyboard cece cece ccc ccc ccc ccc cece cece cece cree cece cece reece ceseces I-3
1.6 POWEY SUPPLY 2. cece cece ccc cere ccc nsec racssccesccasescececcssesees I-4
1.7 FAN weccccscs cc ccccccrccccercce ser nes er encccererencesseseessseces I-4
1.8 SOFCWALE cece ccc ccc ccc cece c cere nar ce cece asec nce eee eee ese seeseses I-4
1.8.1 System SOftTWALE Lecce ccc c cece rere cece werner ccc ens necceces I-4
1.8.2 Program LangquageS ...ccwccccccccccccesccccvesssesvssecces I-5
1.9 DIMENSIONS Lecce ecccccccccccasceccceccesssssesesecsssssecccessces I-5
LL10 Weight Lecce ccc ccc ccc crc c ccc cece eae cece reece cee eee eee cece ees I-5
1.11 Environmental LimMitS 2... ccc cc ccc ccc cece cece cece were eee eects ces I-5
1.12 Destinations vs. Model NameS ... cc cc cw ccc cc wee cee cee ee eee ceeee I-6
SYSTEM CONFIGURATION 2... ccc cc ccc cc ce cc er ce ee eee wre cece eer sec e neces cceee I-7
BLOCK DIAGRAM 2. ccc cc ccc cece cc ec ec cee eee eee ee eee eee eee eee e eee ee eect eee I-10
HARDWARE OUTLINE ..c ccc cc ce ccc cc cece ew cc eee eee cece ee eect eee weer ee eceee I-11
4.1 General Description em ee eee eee meee eee eee eee emcee eee essere cces I-11
4.2 Ventilation ...... ecm meme e meee reece reece eee ene e reese sere seeeencns T-12
4.3 Memory Configuration weer cc ccc sence cern cnc ccc n cece ccececsscccces I-12
4.4 Input/Output Structure .e ccc cece ccc ccc ccc cee n eee c cece cesses sscees T-14
DISASSEMBLY PROCEDURE 2. ccc cc ccc ee ee cc ec cee cc ec ee ee ee eee reer eens ese sene T-15
5.1 System Unit/Plasma Display Unit 2... ccc cc cc we ccc ew cece eens T-16
5.2 System Unit/Floppy Disk Drive Unit 2... ccc ccc ccc cc ee cree eee I-18
5.3 System Unit/Power Supply Unit/Speaker ...... worm ewe cece ee cw ccc cns I-19
5.4 System Unit/Handle Mounting Assembly/I/O Board 2... eee ee eee eee I-21
5.5 System Unit/CPU Board 2... ccc cc cc ccc cw ee cc ctw cc ween c ence neces I-23
5.6 Precautions When Handling MOS ICS Le. ie ew ew ce ce wee cc eects I-24
PARTS LOCATION 2... cc ec ccc cc ce ec ee cee cece ere ee eect ee ee eee tee eee nee ee eees I-25
WIRING CONNECTION 2... cc ccc ccc ccc tee ec cece cree cre eee tee eee erect eee cees I-27
7.1 JB-3301L .o ccc ccc ccc ccc cece cer cece eee ee ee ee nee seer ese sseceees T-27
7.2 JB-3305 Lecce ccc ccc ccc ccc cre nc cee reece renee eee cence eee eee ses ceees T-31
REPLACEMENT PARTS LIST 2... cee ccc c ccc cree ccc c cree cere ere sees ences ecees I-35

TROUBLESHOOTING 2. nce ccc ccc ccc cece ccc cece ween cece reece ese cence ceccccce I-37
9.1 PYELACS Lo cece cece crew cece meee were sce e sence cases eseessccsccces I-37
9.2 Tools for Troubleshooting 2... cece cee cc cece cece cece cess esees I-38
9.3 How to Use Troubleshooting HintS ...... 2. cece wee ccc ce eee cece eee I-39
9.4 Self-Diagnostic TeSt Lo... ccc ccc ccc ec eee wee ccc cence ccc cc eccee T-69
9.5 DIAG PKOGLAM ec cece eee reer ccc e rene ree re rece seceseserccseseceees I-73
9.5.1 GENELAlL Lecce cree ccc reer ence rere csncssccsescescecsccece I-73
9.5.2 |= a=) OF ~ a= oes KO) 6 T-73
9.5.3 Loading DiagnoStic PYOGraM 2... ccc cecccccccccccccccsccces I-74
9.5.4 DiagGnOStic MENU 2... cece ccc cence crn ccccerrsccccccccsccces I-75
9.5.5 Test All DEVICES Lo. ccc cee cee cece ccc eee cee nce rece ececee I-76
9.5.6 Test Automatically wc cece cree ccc crew creer cer ce ccccace I-93
9.5.7 Change Menu 2... c cece cc rece cece acca cece cecccescsccsceces I-94
9.5.8 Brror LISting cece ccc ccc ccc arcs ccc cc cccseccccccsccccce I-95
9.5.9 Error MESSAGES .ewwece cc ccc cern scree sccseccccecccccsces I-96
9.5.10 EXit cece c ccc cc ce ccc cee wwe ewww eee w cere ccc cee eens eseeees I-103
II. LOGIC UNIT
SPECIFICATIONS 2. ccc ccc cc wee cee ec ee wre rece eee cree sence s acceso scccnens II-1
APPEARANCE 2.2... ccc ccc cece ence c cece cece reece cece rere eee cece eres eee ecee II-4
BLOCK DIAGRAM 2. ccc cc ecw ce cc wc ce cc we cme wre weer cece eee cece ees c erence esces II-5
MEMORY USAGE .... ccc cece cece cece ccc c cece cece cceaee eee eee eee ee ace II-7
4.1 Memory Map ...ccccccccccccccccsrcccccc ec r cece sec ec ccc resco secs oce TI-7
4.2 Display and Video RAM ConStruction 2... cece eee c cece cece nces TI-9
4.2.1 Basic Operation and Display ModeS ..........cccccccceas TI-9
4.2.2 Video RAM Configuration and Display Dots .............. IT-11
THEORY OF OPERATION 2.2.2... cccccccccscccccsccaccccvces eee c cc wcrc cer cccee II-18
5.1 GENEVAlL Lecce ccc ccc cece ence ees c err e cscs cess cesr scence essessecs II-18
5.2 System Resetting and System Clock Generation Circuits ......... II-19
5.3 CPU Lecce ccc ccc cc cence ccc ccc c ence rnc ence er ce sce cee c ccc cccccces II-22
5.4 Microprocessor Peripheral CircuitS ....cccwcccccccnccsccssccces II-22
5.5 Memory Control Circuit Lo. ccc weer ccc cc cece ccc c ence ccc ccc esnces TI-30
5.6 1D) 0 -\ Os is a0 b iy a ITI-36
5.7 T/O AddresS DECOdGEY 2... ccc cc ccc cece ce wer ccc cence cece c cece rece II-39
5.8 Interrupt Control Circuit co.cc cence cnc ccc r nrc cern nce n ce ncece ITT-45
5.9 Display Circuit coc cc ecw cc ccc ccc cen ccc snc ccsssccccessccessscses TI-46
5.10 I/O Interface Circuit co.cc cc wc wc ccc ec cc cc cece cece cere ccc cee TI-88
5.11 Programmable Internal Timer (8253-5) wc. ccc ewe www cc weer ee eee II-108
5.12 Switches ...........c0e0. cere eee cere emer ese serene rece scsccccce IT-109
5.13 Option Slot Interface oc. ecw wc cw w ewe ccc c ccc cer ccc cree cv ccvee TI-112
5.14 Option Slot Connector 2c wc ccc ccc cece recs scccccccscccsccscces II-114
~ii-

REPLACEMENT PARTS LIST AND DRAWING
6.1 CPU Board (PLSMX) ...... cece eeee wee c cence cece ee eeees eee eeee
6.2 I/O Board (PLSY) .........ee cece re cece cece twee c wee ees
| IIIf. PLASMA DISPLAY UNIT
1 e SPECIFICATIONS @oee*ee*e@ee#*eeees#s###e8ee#eee#e#te#ee#e#eee#ee#e#s#tee#eese§ee#@ e#eoeee#e#e#e#e#8#e*#e8t+e@ee#8e¢ee8¢e2 @ e« oe @#8 @® @ @ @ @
1.1 Display Panel ............ ccc e cere cee occ e cece ec eee ec eee ee eee
1.2 DYiver Unit weer eccccccccccccccccncncccenccccces cece cee ences
1.3 Power Supply 2.2... cc ee ccc nce ncccccccese rr
2. APPEARANCE .........4. eee ec ce econ emer ee cece ec e cen eccce ec cece een eee aees
3. BLOCK DIAGRAM .........cc ccc cvee cece cece ree scce eee e emer enw eee cece eee
4. OPERATIONAL PRINCIPLES ......... eee ce ere cc eee cece cece weer crc ccc sce coe
4.1 Display Panel ..... eee ceee rrr cece cece eee
4.2 Display Unit eoee7#s#2k_eese#e#eeee#ee#ee#e#eee#teee8ee80e6hmtmUMmlUOMlUO eoe@ecseeeesLseee#e#e#ee8e##e#e#eeeee#e?t#e#ee#e#8eeese
4.3 Description of Operation ..........2.ee0. ccc rece eee ccc eee eee ee
4.4 Names and Functions of Signals ............. cece ceeee cee cee cee
4.5 Notes ..... Ce ec ee cee rece eer e ese ces cesvees cece ee eee cece cere cence
5. DISASSEMBLY PROCEDURE .......... cc ecw ecco sees Cee ewe cece c rece cece ccc ee
5.1 Detaching Display from System Unit ...... ce eee eee sees ose ees
5.2 Driver Disassemby Procedure .......eeeee. eee ecw e ene rer
6. TROUBLESHOOTING ........2cccee occ eeeeee wc eee ecw meme reer c cre csnecccee oe
7. REPLACEMENT PARTS LIST AND DRAWING ............... we me cee eee err ec cccee
7.1 Exploded VieW 2... cece ccc ceness cece ee rec wer ce cee eee w ewe neces
7.2 Plasma Display and Driver ............ cee ees ra eee cece
7.3 Connections ....... ccc c ees ccc eeee eee mew eee ce nee ae eee ce eee oc eee
7.4 Circuit Drawing 2... cc cece wee cere cee Cece eee cee eee eecee cece eee
APPENDIX A. IC/LSI CATALOG .........2. ccc ewe cee cece cee ere eccee cece ec erceee
A.l IC/LSI etc. Pin Assignment .......... ce cc ecw cee ccc ce eee ccc eee ee
A.2 IC Specification wo. cece ewe ce eee c ccc eee cc eee ee ewes wee ee nce
- iii -
III-1
TII-1
IITI-1
III-3
TII-4
TII-5
ITI-5
III-6
III-6
III-11
ITI-11
TII-12
III-12
ITI-15
TII-17
TTI-21
IfI-21
TIIT-23
TITI-25
III-27
TII-39
IITI-39
TII-41

IV. KEYBOARD
SPECIFICATIONS ...........eceee- we ccc cee ec eee eee eee wee e ee eeeee Iv-1
LAYOUT AND KEYBOARD MARKINGS 2.2... 2. cc ee ce ccc ccc ccc ew cee rece cece ete cee IV-2
2.1 ASCII VErsSion ccc ccc ccc ccc cc ccc ccc cece e eee coc eee weet eee eect ccees IV-2
2.2 English VErsSion Lice ccc ccc ccc cc ec cee ccc cece ccc ee eee ewe nese eces IV-3
2.3 Swedish/Finnish Version ..... ccc ccc ccc ccc cc cccce ec cece cece nce ces IV~-3
2.4 French VErSion .e ccc ccc ccc cc cc cc cw ec ewe cece cece enc ec cere cesses IV-4
2.5 GErMAN VELSION Lecce cccccccccccccccccscesecccccssccsccsccesccees IV-4
BLOCK DIAGRAM 2... ccc ccc cc ce we ce ce cece ccc ewe etter ee ee eee eee eee c ees ccece IV-5
CIRCUIT DESCRIPTION 2... ccc ccc cw ee ce we cee weer ccc ce ete cee e eee eee we eee eee IV-6
4.1 Power Supply .........--. ccm reer were erence errr ens cesses sesssces IV-6
4.2 OSCLILLACOL Lecce cc ccc ccc ccc ccc ec ce cece cee ew eee eee eee weeecees IV~-6
4.3 Data Type and Logic ........2ce eee mcm mew ccc cece ccc cece cces TV-6
4.4 KBDATA and KBCLK Output Timing 2... ccc cc cee cece were crew eees IV-7
4.5 HARD RESET ccc ccc ccc cere reece ce wee cee eee eee eee ete e eee ee ee sccens IV-11
4.6 SCANNING cecccccccccccv cc cccccecccccc cc ecec ccc e cece cere sccsccces IV-11
4.7 Repeat FUNCCION cece c ccc cece ccc ccc ccc cece cerns cece secs eeacesscceee IV-14
SELF TEST Jo. cc eee ee ee wr wc cece ee ccc eer cee eee reece ee eee eee reso cee ne nccs IV-15
5.1 Self Test Start Condition ec ce meme ccc cree eee merece eect crease eeee IV-15
5.2 Self Test Flowchart 2... cc cc ccc ccc ecw cc eee ec re eee cece eee ees eeees IV-16
DISASSEMBLY PROCEDURE 2... cc. ccc ccc cc ccc ee wcrc ce ee cree wr eee ee eee arte sees IV-17
6.1 Keyboard cece cc cence s crc c cane ccc aces seca senses ese sessssesecceee IV-17
6.2 Key SwitcheS .o cece ccc ccc ccc ccc ccc c ccc cee rece e cece wees see cene IV-19
TROUBLESHOOTING . cc ccc ccc cw ccc re ec ccc eee ec cee eet eee weet reece ee eeeee IV-22
REPLACEMENT PARTS LIST AND DRAWING ..... 2. ccc ccc ew ce ccc ee ete eee eee eae IV-27
8.1 Exploded VIEW ccc cece ccc ccc cre ccc reece cee c cree cee cces ees eesees IV-27
8.2 Coard Table Lec ccc cc ce ccc ee cc wwe cee cece ee ec cere eee were eee es IV-32
8.3 Circuit D1iaAgGraM occ cw cc ccc ccc ccc sc ses ecscescsces ec cece ccc eee TV-33
“t
- 1V-

V. POWER SUPPLY UNIT
SPECIFICATIONS 2... cc ecw ccc eee c ccc c ee rece eee c ere recess cence ee ee sees eees V-1
APPEARANCE 2. ccc ccc ce ccc cc mec we meee ec eee eee eee meee eee rete eee eee seeees V-2
BLOCK DIAGRAM 2... ccc cc cee ecw cc ccc ee were ecw e cece eee ese s cere cree escceses V-3
HARDWARE OUTLINE 2.2... ccc ccc rec ce cee eee ene cree cre ee eee cece cece nese eeseces V-4
4.1 GENELAlL Lecce weer wc cee r cece acca crac cesar ese seesscesesessescescces V-4
4.2 Input BLOCK 2... ccc ccc ccc ccc cece reece enc cere reece nee n tse sseccccs V-4
4.3 Rectifyig/Smoothing Circuit 2... ccc cw ccc ccc cc cere ccc n cece ec cces V-5
4.4 Converter and Output Circuits for Low Voltage Output ............ V-6
4.5 Converter and Output Circuits for Plasma .........cccccccceces eee V6
4.6 Primary Control CircuitS .. ccc ccc cence ccc ccc cece cc cc cece nceseces V-8
4.7 Secondary Control CircuitS ..cccwccccccccccccccccccccccccescccees V-9
4.8 Volume AGJUSKMENt ecw ecw ceec cece r cee c cers cccccrcccesceccccssnces V-10
TROUBLESHOOTING 2... cc ccc wc cc cc cw weer ee we cee re nec e reece ees e esse ence sccne V-11
5.1 NO OUtEPUE Lecce cer c creer eres cere nec rcrsccecsererevessssescsscsese V-12
5.2 No Low Voltage Output or No Plasma Output ......... ccc ce cnccccces V-13
5.3 Partial Output 2c cc ccc ccc ce ec weer ccc ec e eee cent eee e ee seesees V-14
CONNECTORS 2. ccc www we re wwe ree eee eee ee eww cee eww eee messes eres cece esccees V-16
REPLACEMENT PARTS LIST AND DRAWING 2... cc cee ccc ee ee ce cee reece cece cece V-17
7.1 Exploded Drawing 2... ccc wee c ccc c weer cece errr ccc ecccescee ewe eee ceee V-17
7.2 PartS LOCACION Lecce weer ccc cece screenees c cece re scane recess secscces V-18
7.3 Circuit Drawing ....cccccccccccscccccccccccccccs cece ec cccc cs cccce V-19

10.
VI. FLOPPY DISK DRIVE
PART I
INTRODUCTION eoeoees#ees#se#eesdseee3eeeeeeceexus#Heocdceedet32s#soeeseeeseee#2keeeeecveees9#Hoeceee#se#ee#ees6eseeee#e#ee#eees#%see®
MODELS AND MODEL NUMBERS ........ee.6 ecco reer cc ere ere reccces eee c cc cccn
SPECIAL TOOLS 2... ccc ec ccc cece eee cece crc rere crc ccccece ec ere cc cease sececea
OUTLINE OF MAINTENANCE 2.2.2... ccc cece cc er cece reer c ere cccccce cee ccaee
DIAGNOSTIC PROCEDURES .......c cece ccc re ccensccce cece cece ccc ccce oc eee
5.1 Error Symptom Recognition ....... eee ce mr cme eee ec ee cee ces ceees
5.2 Soft Error Detection and Correction ........... emcee were ec cene
5.3 Write EYrrOr wc ccc cee cece ec cence eee e neces cece cece cece secee eee
5.4 Read Error ..... ee cc eee creer cere wceene cece cece eee rece s ene cece eee
5.5 Seek Error .....2.ceeeeee cece ec cece reece ccee cece cee were eee ec eee
5.6 Compatibility Error ......... ec cee ee wee wenn cece ee cee ewe eee neee
TROUBLE ANALYSIS ....... Cem ecw err c ccc r er crc rec cero eesccce eee r ccc ccccce
6.1 Trouble Analysis Procedure ........c-eeeee. oc cee eee cece cee ee
6.2 Troubleshooting Flow Chart ........ eee c eee ceee cece eee rece ccee
6.3 Trouble Analysis Table wo... ccc cc eww ee wwe ccc we cee ew cc ceee eee
PREVENTIVE MAINTENANCE ..... Lecce cece cece ccc cece cece eee eeseesece
MEASUREMENT ITEMS FOR EACH MODEL ......... eee eee wee eee c cee cecces
ADJUSTMENTS AND VERIFICATIONS 2.2.2... ecw cccccvcecs ecm cere rc c ec ccccrcccess
9.1 Motor Speed Adjustment and Verification (Index Period) .......
9.2 Write Protect Verification .......... ccc eee cee eee cece ccc eee
9.3 Head Output Verification ...... cee ccc e rere reece rc e ssc cccsces
9.4 Output Modulation Verification ...... occ c cece eee ee cece cece eee
9.5 Radial Alignment Adjustment .....c cece eee ccc cccnece cece eee wees
9.6 Azimuth Verification ...c. ccc ce eee cee ween emcee ccc crc es ce cene
9.7 Index Burst Verification 2... ccc cece ccc w acces eee ree wee esc eeee
9.8 Track OO Sensor Adjustment ............2.20e cece cere ec cee ween
9.9 Limiter Verification (5.25-inch) ..... ccc e ewer cones cece eee
9.10 Limiter Adjustment (3.5-inch) .... ccc eee ec cee new c ccc ccc ccccene
9.11 Asymmetry Verification 2... cece cece cece ccc ccc wcrc ccc ccc wc cc cee
PANASONIC ALIGNMENT DISKETTE ...... ec c ccc cee cece woe ec ccc cece oe cece ees
-vi-
VI-1
VI-1
VI-1
VI-2
VI-2
VI-2
VI-2
VI-3
VI-3
VI-3
VI-3
VI-3
VI-3
VI-4
VI-5
ViI-7
ViI-7
VI-7
VI-8
VI-8
VI-10
VI-10
VI-11
VI-11
VI-11
VI-11
VI-12

11.
12.
13.
14.
15.
16.
17.
18.
PART ITI
REMOVALS AND INSTALLATIONS ..... doce c ccc cccecccceccccecceccececcecees VI-13
11.1 PCB Removal and Installation 2... ccc ccc cc www crew n cee cccncne VI-13
11.2 Front Plate Removal and Installation 2.2... ccc ccc cece cece snes VI-13
11.3 Track OO Assembly Removal and Installation .........cccwececes VI-13
11.4 Collect Assembly Removal, Installation, and Adjustment ....... VI-14
11.5 Clamp Assembly Removal and Installation ...........222..0ee00. VI-14
11.6 Write Protect Sensor/Index Detector Assembly
Removal and Installation ... ccc ccc eee ec ewer ccc cane c ccc ccccae VI-15
11.7 Cartridge Guide Assembly Removal and Installation ............ VI-15
11.8 Stepper Motor Assembly Removal and Installation .............. VI-16
11.9 Carriage Arm Assembly Removal and Installation ..... ccc eee cee VI-16
11.10 Drive Motor Removal and Installation .....c wwe c ewe eee cece cenes VI-17
11.11 LED Assembly Removal and Installation ........ cc ccerccccccess VI-17
TEST POINTS 2... cece ccc cece cee eee eee cece eee eeeescceees we cece VI-18
EXPLODED VIEW eoeoevnereceaneeveee ooceoeoeoeweseeew eee ee won eee eo ow eon eee eae we eo em ewe aeons VI-19
REPLACEMENT PARTS LIST 2... ccc ccc cece ccc ccc cece ete cee enc ceceeceeees .. VI-20
REPLACEMENT PARTS LIST OF PCB .......... Cece reer cece cere cece s cc eccccce VI-21
SCHEMATIC DIAGRAM 2... cece cece cece cc cece cece cece e eee e cece cecesees VI-23
CIRCUIT BOARD 2... cece ccc cece cece eee cece eee eee ence e eee s ee eeeee VI-25
BLOCK DIAGRAM 2... cece ccc ccc cece cece ce ee eee eee eee eee e neces eesees VI-26
APPENDIX 2. ccc cc ee ete we ew eee wee ww eww wee ere re er were ee res cet ee ee see eeves VI--27
INTRODUCTION 2... cc cee c ce cw we eee e ewe ewer ere eee eee ewe were weet eer e eee cence VI-27
OPERATING THE PROGRAM ........ cc eee eee ce cc ewe rere eee errr ewer ewe nce V1I-28
2.1 Head Output Alignment Calibration ..........-. cee cee eee eee VI-29
2.2 Track OO Signal Calibration ................-.. ec ee ee eee eee VI-30
2.3 Carriage Limit Calibration ................. eee ec ee weet woes VI-31
2.4 Index Timing Calibration 2... 2... cee eee ce we we ewe ee ween VI-32
2.5 Azimuth and Cat's Eye Pattern Calibration .................... VI-33
2.6 Head Cleaning 2... cece eee ewe cee ee re ewe cree cece eee wee cer ee es eees VI-34
2.7 Maintenance Disk Drive AsSignment .......-... ccc ee cece cece cece ViI-35
2.8 Menu Selections 8 and 9 cece ecw cece ec cece eer cece we cre cc wees euee VI-35
- vil -

VII. OPTION
VII-1l HARD DISK CONTROLLER
PREFACH 2... c wwe cc ew ee ce eee www wee ee ee we ww ee ee ee ecw ew cee ee eee ene ence cr cece ViII-1
1.1 GENEVAlL Lec eee cw ee ec we ee ee ee te ee ew ee ew we renee eee nee e ee nne VII-1L
1.2 Specifications .......... cee ween eee rr VII-Ll
1.3 Correlation Table for Connected Magnetic Disk Drives ............ VII-1l
1.4 Block Diagram 1.2... eee ee ce eee ec ee cee ee ee eee ee eee eee ce eeceeee VII-3
PRINCIPAL SPECIFICATIONS 2... 2... cc cee cw cw ce cw ce ee we ewe were eee nw ewer nce VII-4
2.1 General DESCKFIPtION 2... ecw eee ce we ce ce ce ew eee ewer ce rere ne eene VII-4
2.2 Power Supply 2... cece cee ce wee ce ecw eee eee ee reece ween ween eee cence _VII-4
2.3 COMNECCOLS Loe ee weer ccc cece ewe w cece eee were een e ee ce tence eee eee eees VII-4
2.3.1 CNL ce ccc cc ce wc we ee ce ce ee ee eee ew eee eee eee eee eee eens ViI-4
2.3.2 CN2° and CN3 2... cc ccc cece cee ee ce ee ee eee ce ew ee wee ee tee ewer VII-6
2.3.3 CNA cece cc cee cc ee ee we tee we ee eee ee eee ee eee eee eee nee VII-7
FUNCTION SETTINGS AND MOUNTING METHOD FOR NDC 5027M BOARD .............- VII-8
3.1 General DESCKIPCION woe ee cw ce ce ee ew wee wee eee were weet eee eee eee cnes VII-8
3.2 Function SettingS 2... cece ec cc ee ce ee ee ee eet ew eee ee ee ee eee eee VII-8
HOST INTERFACE 2.2... cee ew ce ec cc ee cw eee ee ww ww we ew wee ew we eee te ee ee ne ene VII-9
4.1 Time Chart of Principal Operations 2... ecw cc ec ee ew ee ee ee we ees VII-9
4.2 Transmission Method 2... 2... ce ce cee ee ee cw ee wee ee ee ew eee ee cee ene VII-16
4.3 General Flowchart of BaSic Operations ......... cee wee cw eee eee ee VII-20
4.4 Main Command Flowchart .... cece ec ce ee ee ee et te eee eet eee ees VII-21
BASIC OPERATIONS 2.2.2.2 cee ce cee ccc we ce ew we eee wee ee wre eee ee ewer etree ewe eens VII-22
5.1 Seek Operation cece cece ce cece cece ee cw cece re ere eee eee rere ee eecee VII-22
5.2 Read Operation ...... we wee re wee rece ee nee eee ee wee ee eee wee VII-24
5.3 Write Operation 2... ee ee cc eee ce cee ce tee we ee et ee ew eee tee eee eee VII-26
DRIVE INTERFACK ........6-..2.2..-. ecw ce we we eee we we ee eee vee wee meee ew eee VII-28
6.1 Description of Drive Interface SignalS .......-...-... 202-2 ee ees VII-28
6.2 Drive Interface Driver and Receiver ............-.....- wee cee eee VII-30
6.3 Drive Interface Timing 2... eee c ce cee wee wc ee nce ee tere ee ewe nee VII-31
ENCODER/DECODER AND DATA SEPARATOR ... 2... eee cece cece eee ee eee ee eee eee VII-32
7.1 General DESCYIPCION Loe eee cee cee ee ce ew ee ere ee ee ee eee ee nene VII-32
7.2 Principal Features 2. ccc ecw cw ccc we ce eww ce ee rere ee ee cee renee eens VII-32
7.3 Operation Of NDC 842 .e eee wc ce ce cw ce eee we ewe we ee ee we eee ee wees VII-32
7.4 TAiMing 2... ce ccc ccc cece re cc eee wr cree ce cee wee eee ee ee eee ete were ee eee VII-37
- viii -

10.
11.
12.
LOI SPECIFICATION ....... ec cee cece cece See me twee ee cee ere ce eee e wre te nese VII-42
8.1 NDC 840 Lecce cece ccc wwe eee ee eee mee eee ee eee meee eee eee eee ee eee eee VII-42
8.2 NDC 841 Lecce cece cw cc cc cw weet ce ew weet ee ee teeter ee eee ee eee t wee ees VII-45
8.3 NDC 842 Lecce cc ccc ccc ce newer weeeww ewe e eee eect tenet nee eee neces VII-47
8.4 NDC 843 oe ® eee eB we eH ee eo 8 wwe ce were meee ec ere ce we tre rece reece ee cee coe VII-51
8.5 NDC 8460 Lecce ec cc ce ee ee ee ee ee ee ee ee ee ee ee ewe eee eee ee eee VII-54
PARTS LOCATION 2... 22 cc www cw cw ce eee wee cc ec er were cere c weet were e ne ences cens VII-57
CIRCUIT DRAWING 2... cc ccc ecw cc ew ww ewww emcee emcee enews eee ete eee nescence VII-59
TROUBLESHOOTING 2.2.2 ccc ce ec ccc wc wee cece ee wr seen n ces e erence nese scsessces VII-73
TL.1L Outline .e eee ccc cc ccc cw cc cee we ree ee eee eee ee cee ee ee eee eens VII-73
V1.2 Configuration co.cc wc cc cnc wcrc ccc cence eee c cern ees esees eee ee eee ViIi-73
11.3 AnalySiS Method 2... eee cc ce cece eee ecw wreee cere ce nee eee ee aese VII-73
REPLACEMENT PARTS LIST 2... cc ccc cw cc ccc ee ce ce cc ew ce ect ee ee eee ee wees
-~ix-

ORDER NO. DATA 85012
Technical Guide
Portable Computer
JB-3300
| General
ll =§=Logic Unit
Il Plasma Display Unit.
IV Keyboard
VV Power Supply Unit —
VI Floppy Disk Drive
Vil Option
Panasonic
Matsushita
Elecric
Trading
Co
Lid

T.
SPECIFICATIONS
Logic Unit
CPU
Math Co-processor
ROM
RAM
RAM Expansion
Interrupt
DMA
Timer
Sound Logic
Floppy Disk Controller
Hard Disk Controller
(Hard Disk version)
Display Controller
Character Mode
Graphic Mode
GENERAL
8088 4.77 MHz
8087 (Optional)
16K bytes EPROM in socket (27128)
256K bytes Standard
extendable to a total of 640K bytes
Up to 512K bytes on main P.C.B.
128K bytes optional (512-640K bytes)
inserting RAM board for PC or XT into
option slots
IBM-XT Compatible
IBM-XT Compatible
IBM-XT Compatible
IBM-XT Compatible
IBM-XT Compatible
ITBM-XT Compatible
Option slot is not occupied
IBM-XT Compatible
Special for Plasma Panel
25 x 80 characters
400 x 640 pixels
16 x 8 char. box
or
25 x 40 characters
400 x 320 pixels
16 x © char. box
200 x 320 pixels
200 x 640 pixels
or
406 x 640 pixels

Serial Port
Parallel Port for Printer
Option Slots
Plasma Display Select Switch
Plasma Display
Resolution
Panel Size
Color
Residual Image
RS-232C
IBM-XT Compatible
IBM-XT Compatible
2 slots
13-inch Card is acceptable
IBM-XT Compatible
Selecting Plasma Display ON or OFF
RGB color CRT is available with its
adapter card in option slot, by selecting
"plasma-off" of this switch
640(H) x 400(V) dots
Dot pitch 0.3(H) x 0.36(V) mm
Viewing are 192(H) x 144(V) mm
(Equivalent to 12-inch CRT)
Aspect Ratio 4(H) : 3(V)
Neon Orange
NO
Intensity Control for the Whole Screen
FLoppy Disk Drive
Type
Number of Drives
Capacity
Access Time
Average
Track to Track
Settling Time
Average Latency
5.25-inch (JA-551-035N) (SA455)
Double Sided and Double Density
2 drives (Floppy Disk Version)
or
1 drive and 1 Hard Disk
(Hard Disk Version)
Double sided and double density
500K bytes (unformatted)
320K bytes or 360K bytes (formatted)
68 ms
4 ms
15 ms
100 ms