Selective Ribbon

SYMPTOM

POSSIBLE CAUSE

REMEDY

REMARKS

Machine will not

print full charac

ter.

1. Ribbon folds over

1. Adjust tracking of ribbon, so it

will not bind on inside of cartridge.

2. Clean and remove binds (107-20

in shock wire and ribbon guides

(110-27).

3. Adjust retaining clips (107-28)

to securely hold cartridge on.

4. Replace broken ribbon guides

(110-27).

2. Ribbon lift failure

1. Replace worn lift lever (112)

(108-21)

2. Replace broken ribbon guides

(110-27).

3. Replace broken or missing

ribbon lift bias springs(107-32).

4. Ribbon load lever spring miss-

ing or broken (107-33).

3. Spread adjusting plate

loose or broken.

Adjust spread plate (110-26) for

more or less spread between lift

positions.

The selectric II has 3 lift positions

The spread adjusting plate controls

the distance between these lift

positions.

4. Ribbon lift adjusting

screw loose or maladjust

ed.

Adjust ribbon lift adjusting screw,

to raise or lower ribbon.

Stencil lever will

not operate.

1. Stencil lever forced to the

left and out of ribbon

plate.

Reinstall stencil lever back in

ribbon plate (111-36).

2. Stencil lever will not

operate.

Observe:

1. That ribbon lift cam follower

roller(113-37) has clearance to

move laterally across lift cam

(109-34). The roller should

move to right, out of contact

with lift cam (109-34)

2. That the ribbon lift control

lever (108-21) prevents ribbon

feed pawl from operating.

Lug on lift control lever pre

vents feed pawl from operating.

Print on paper

too light.

1. Ribbon cartridge proj ec

tion mode actuator broken

(13-28)

Replace ribbon.

2. Oil on ribbon

Replace ribbon.

3. Ribbon not installed

around shock wire.

Install ribbon around shock wire

(107-20).

Prevents ribbon from feeding.

4. Worn ribbon lift lever

(108-21)

Replace lift lever (108-21)

Causes characters to overlap

between lift positions.

5. Loose lift control mount

ing post.

Replace ribbon plate (108-22).

6. Ribbon feed gears worn

or broken.

Replace feed gears (108-23)

In order to check teeth on gears,

remove gears for inspection.

7. Ribbon feed cam follower

eccentric loose or malad

justed.

Adjust cam eccentric (109-24) to

drive feed pawl and ribbon feed &

lift wheel to the next detent posi

tion on the wheel (111-30).

8. Broken or damaged

spiked driver.

Replace spiked driver (108-25)

Broken spiked drivers are also

caused by using incompatible

ribbons.

9. Spread adjusting plate

broken, loose or malad

justed (110-26)

Adjust spread plate (110-26) for

more or less spread between lift

positions.

The selectric II has 3 lift positions

the spread adjusting plate controls

the distance between these lift

positions.

10. Wobbler bellcrank

broken.

Replace wobbler bellcrank(108-27)

Check movement of wobbler bell

crank from one mode to the other.

11. Cartridge guides and

retaining springs not

holding cartridge securely (107-28).

Adjust and form cartridge retain

ing springs.

Ribbon advances

too far (Causes

wasted ribbon)

1. Mode buttons binding.

Replace any damaged mode buttons

and remove any binds (111-31).

If mode buttons are binding, there

will be no gear ratio change for

ribbon feed.

2. Wobbler bellcrank broken

or damaged.

Replace (108-27)

Wobbler bellcrank is not restoring

to latched rest position for film

ribbon mode.

3. Feed cam eccentric

(109-24)

Adjust feed cam eccentric(109-24)

for proper ribbon feed.

Drive pawl should move ribbon

feed & lift wheel (111-30) to the

next detented position.

Ribbon will not

feed properly.

1. Check ribbon cartridge

for mode projection

extension.

If mode projection is missing -

change.

Mode projection is on the cartridge

of blue core ribbon.

2. Worn or damaged feed

gears.

Replace gears (108-23)

Remove gears to inspect for damage.

3. Spiked driver broken

Replace driver (108-25)

Some broken spiked drivers are

broken due to quality of ribbon

being used.

4. Take-up spool inside

cartridge not winding up

used ribbon evenly.

Clean and lubricate ribbon mech.

Check and adjust for tracking.

If ribbon doesn't track properly,

ribbon could fold and or bind

inside of cartridge.

5. Broken ribbon lift guide

Replace ribbon guide (110-27)

Guide pins in ribbon guides fall

out due to cracking of ribbon lift

guides.

6. Ribbon feed pawl eccen-

tric loose or maladjusted

Adjust ribbon feed pawl eccentric

(109-24) for proper ribbon feed.

The feed pawl (109-29) drives the

ribbon feed and lift wheel (111-30)

7. Ribbon not installed

around shock wire.

Install ribbon properly around

shock wire (107-20).

Shock wire controls ribbon supply

spool detenting, which keeps the

ribbon winding taut (107-20).

8. Binds in ribbon mode

buttons (111-31).

Check mode buttons for damage

and binds (111-31).

Mode buttons control ribbon feed

gear ratio change - this controls

the amount of ribbon feed.