Machine/Keyboard Locked-Up

SYMPTOM

POSSIBLE CAUSE

REMEDY

REMARKS

Machine locked

up.

1. Machine not plugged in or

no power at outlet.

Check A. C. power at outlet.

2. Motor, on-off switch or

wiring defective.

Check wires using continuity

check.

Bypass switch to check for defects

3. On-off switch link.

Check for binds or broken on-off

switch link.

4. Motor pawl springs off.

(3A-7)

Replace damaged or missing

springs.

If spring is missing on pawls -

the motor may not build up enough

momentum to start properly.

5. Motor pawl pulley frozen

to motor shaft (3A-5).

Remove motor pulley from motor

shaft, clean and lubricate.

Check for nylon insert between

motor pulley and motor shaft.

It prevents pulley from freezing

to shaft.

6. Broken drive belt (6-7)

Replace

7. Cycle clutch spring

broken or damaged(50-45)

Replace

8. Too much end play in

cycle shaft, causing cycle

clutch spring loop to

drop between cycle shaft

and cycle clutch pulley

hub.

Replace cycle clutch spring

shim cycle clutch shaft to control

end play.

Early model machines use shims

to control end play. Late level

machines use a collar (1-1).

9. Not enough cycle clutch

end play - causes binds

Adjust end play of cycle shaft for

minimum clearance - no binds

End play is controlled by shims or

a collar (1-1)

10. Shift spring dropped

loop between shift arbor

(3-2) and shift cam.

Replace shift spring - adjust shift  arbor for minimum clearance - no binds.

11. For further causes refer

to keyboard section.

Keyboard locked

1. Broken drive belt (6-7)

Replace drive belt

In order to replace drive belt -

remove cycle clutch shaft.

2. Motor pawl springs damaged or broken (7-8).

Replace

3. Motor pulley frozen to

shaft (3A-6).

Remove pulley, clean and lubri

cate.

Check for nylon sleeve between

pulley and motor shaft. Keeps

motor pulley from freezing to shafi

4. Interposer latched down,

but did not release cycle

clutch (55)

Adjust cycle clutch latch keeper

(54-8) to release cycle clutch

latch link (54-9) as interposer is

latched down (55).

5. Compensator (57-13) tube

jammed or maladjusted.

Adjust end plugs so keybuttons are

easily depressed without allowing

two keys to be depressed at the

same time.

6. Character interrupter

damaged or maladjusted

(49-40).

SEE "Random malselection, cause27".

7. Carrier return print

interlock (58-14)

Adjust print. interlock up and down

shaft so character interrupter

pawl (49-40) will prevent printing

during carrier return operation.

It may be interfering with cycle

clutch.

8. Keyboard lockout bell crank binding (52-7).

Remove binds; also check inter

lock bail lever (53-4).

9. Cycle clutch latch keeper

(54-8)

Loosen screws (58-16) and adjust

keeper bracket up and down until

cycle clutch latch has a full bite

on cycle clutch sleeve (59-17).

10. Cycle clutch keeper

bracket. (60-18).

Check for damage.

11. Cycle bail upstop (61-19)

Adjust cycle bail upstop (61-19)

so latch pawl (54-20) is held by

1/2 thickness of keeper (54-8).

Insufficient bite could cause extra

cycles.

12. Shift arm not detenting.

See Shift section.

13. Shift clutch spring

dropped between arbor

and cam (62-22).

Replace shift spring and adjust

shift arbor (62-23).

Clearance between shift arbor

and shift cam should be minimum;

no binds.

14. No lubrication on cycle

clutch spring (50-45).

Lubricate with recommended

grease (50-45).

15. Cycle clutch sleeve end

play (63-24).

Loosen clamp (63-26) and adjust

overthrow stop left or right for

clearance between sleeve(63-24)

and cycle clutch pulley (63-27)

Loosen clamp (63-26) and rotate

If cycle clutch end play is not

maintained - the cycle clutch

might hesitate to release and the

machine will feel sluggish.

16. Cycle clutch overthrow

(63-25).

Loosen clamp (63-26) and rotate

overthrow stop radially (63-25)

for clearance of  .010" between,

at point (63-28), sleeve (63-24)

and overthrow stop.

Overthrow stop controls the rest

position of filter shaft, cycle

shaft, and print shaft. Too much

overthrow could prevent the

depression of keybuttons.

17. Cycle clutch latch

bracket maladjusted.

(64-29).

Adjust bracket up and down ac

cording to the #3 scribe line on

the hooverometer . (135-29)

If latch is too low, cycle clutch

might not release or machine will

have a sluggish feeling.

If latch is too high, could cause

extra cycles.

18. Cycle clutch latch worn

or broken (59-15).

Replace latch

19. Bell clapper bellcrank

(53-6).

Bellcrank is screwed to the left

end of lockout bail (53-4).

If bellcrank becomes jammed, it

could lock keyboard.