HP HP-97 - Page 6

Contents
Section
C-6. Program Memory Test Program Card .
C-9. Functional Test Program Card .
C-12. Data Card 1
C-15. Data Card 2 . .
C-17. Diagnostic Test Program Cards
Appendix D SERVICE NOTES
Illustrations
Figure Title Page
1-1 HP-97 Keyboard and Memory . . 1-6
2-1 HP-97 Block Diagram . . 2-1
2=-2 LED Digit . . e e e e e e e e . 2=2
2-3. LED Display Format e e e e e e e e . 2-3
2-4 SYNC and Display Timing . . . . . . . . . 2=3
2-5 Timing Diagram . . . . 2-5
2-6 Print Head . . 2-6
2=7 Printed Character . . 2=
2-8. HP-97 Power Supply Clrcu1t . 2-9
2-9. Over-Voltage Circuit .2=-10
2-10. Battery Charging Circuit 2=-11
2-11. Power-On Reset Circuit . e 2=-11
4-1 Faulty Function Verification and Repalr 4-3
4-2. Program Memory Test . . . 4-9
4-3 IC Replacement Flowchart, Functlonal Test . 4-15
4y Logic PCA (A1) Component Location Diagram . c4-19
4-5. Logic PCA (A1) Schematic Diagram JAU4-19
4-6 CR5 and CR6 Anode Waveforms . 4-20
-7 1 and 2 Waveforms . . « ¢ « o« « o« « o 4-20
Y-8 SYNC Waveform . . 4-20
4-9., RCD and STR Waveforms . 4-20
4-10. Printer PCA Lead Location . y-22
4-11. Print Head Cable Removal .« « o JH4=22
4-12. Print Head Cable Insertion . . y-22
4-13. Print Head Cable Contacts . « o . . JUH=22
4-1Y4, Head Carriage Home Position . . J4=23
4-15. FWD Waveform 4.2y
4-16. STB Waveform . -2y
4-17. Printer PCA (A4A1) Component Locatlon Dlagram . 425
4-18. Printer PCA (A4A1) Schematic Diagram . 4-25