Tandon TM848-1 - Page 4

Section
Number
Title of Section
Page
Number
1.19.18
1.19.19
1.19.20
1.19.21
1.19.22
Inhibit Write When Write Protected , 1-21
Allow Write When Write Protected 1-21
Head Side Select Options S1 - S3 , 1-22
Spindle Motor Control Options M1 - M4 1-22
Motor Control Select Options MC1 - MC4 1-22
SECTION II MAINTENANCE CHECKS AND ADJUSTMENTS
2. Introduction 2-1
2.1 Spindle Drive Motor Checks and Adjustments 2-1
2.1.1 Long-Term Drive Motor Speed Checks and Adjustments , 2-1
2.2 Cats Eye Alignment Check and Adjustment 2-2
2.2.1
Cats Eye Alignment Check 2-4
2.3
Head Carriage Adjustment 2-5
2.4
Index Sensor Checks and Adjustments 2-6
2.4.1 Index-To-Data Burst
Checks 2-6
2.4.2
Index Sensor Adjustment , 2-7
2.4.3
Index Pulse Width Check 2-8
2.5 Track
00 Sensor Check and Adjustment 2-8
2.6
Amplitude Check 2-9
2.7
Azimuth Check 2-10
2.8 Load Arm Adjustment 2-10
SECTION III
PRINTED CIRCUIT BOARD OPERATION
3.
3.1
3.2
3.3
3.4
Introduction 3-1
Physical Description of The Circuit Board 3-1
Interface Electronics Specifications 3-1
Input Control Lines 3-2
Output Control Lines 3-7
SECTION IV TROUBLESHOOTING GUIDE
4.
4.1
4.1
4.3
4.4
4.5
4.6
4.7
Introduction " " ., " .. 4-1
Not Ready and/or No Index , .. 4-2
Will
Not Seek or Restore 4-2
Will
Not Write 4-3
Will
Not Read 4-3
Activity L.E.D. Inoperative 4-3
No Track 00 Sensor Indication 4-4
Drive Motor Will Not Start When Door Latched 4-4
SECTION V REPLACEMENT PROCEDURES
5. Introduction 5-1
5.1 Drive Belt 5-1
5.2 Drive Motor 5-2
5.3
Circuit Board 5-3
5.4
Cone Assembly 5-4
5.5
Diskette Lever , " 5-6
5.6
Bridge Assembly 5-6
5.7 Bezel 5-8
ii