Radial Head Load Signal - Tandon TM848-1 Operating And Service Manual

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Operating and service manual (90 pages)

Table Of Contents

Table of Contents

1.19.14 Stepper Power From Drive Select (DS)

This option allows the user to remove D. C. power from the stepper motor using drive select, which

results in lower stand-by current consumption.

The Stepper Power From Drive Select option is implemented by installing DS, and cutting HL.

1.19.15 Stepper Power From Head Load Line (HL)

This option supplies power to the stepper motor when the head load line goes low(true). This results

in lower stand-by current consumption.

This option is factory installed. DS must be removed for proper operation.

1.19.16

H e a d L oad Alternate Output Pad Option C

This option allows the user to load and unload the head load solenoid (optional) and, along with the HL

and Y options, enables the stepper motor and lights the Activity L. E. D., respectively. Head load is

a ccomplished by connecting both option pads C located near interface connector

1.19.17

R a d i a l Head Load Signal, Options A, B, and X

By selection of the appropriate combination of the A, B, or X jumper, the user can use either Drive

Select or Head Load to activate the Activity L. E. D. and Lever Lock Solenoid option (see Figure 1-10).

Dsl

DSI

2 1

D'SZ

052

2 S

DS'S

Clss 30

Dsa [~P

at,

12,

SIDE

A Cls

ls 5

U'\

HLL

HLOFF -

1.19.18

I n h i bit Write When Write Protected (WP)

This option is used to lock out the write gate when a write protected diskette is installed.

Inhibit Write When Write Protected is factory installed.

1.19.19

A l l o w Write When Write Protected (NP)

This option allows the controller to write on any diskette, whether or not is is write protected.

L'S04

+C7

4.7VIP

054

L'300

LSDZ

LSDB

IS HEAD LEAD

UICo

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lCiAZ,