Lincoln 1400 Benutzerhandbuch

Impinger I -–1000 Series Service Manual - Domestic

Speed Control Potentiometer This is a 0 to 400 ohm or 0 to 500 ohm, 10-turn

potentiometer. WITH POWER OFF: remove the

red, white, and black leads from terminals S1, S2,

S3. With a digital multimeter, check the ohm

reading across the red to black leads. This ohm

reading should be a steady 400-ohm, or 500-ohm,

through the entire 10-turn rotation of the

potentiometer. Check for shorts or opens or

unsteady, ohm reading, if potentiometer is

defective, replace. If the potentiometer checks OK,

and there is no output at terminals A1 and A2,

replace the D. C. control board.

Reversing Switch

If there is D. C. voltage output from the motor

control board, but the conveyor drive motor is not

running, check the D.P.D.T. reversing switch.

Conveyor Drive Motor

Check the conveyor drive sprocket for tightness.

Disconnect the motor, check the red and black

motor leads for opens, shorts or grounds. Check

the brushes for excessive or

abnormal wear.

Replace as needed. Reconnect motor. Test for

operation. If motor does not run, replace.

Voltage Supply

Check incoming voltage supply at line 1 to neutral.

There should be a voltage reading of 120 VAC. If

no present, check breakers. 3 Amp Fuse. This

conveyor fuse is located on the front panel.

Replace if defective.

Fuseholder

Check and/or Replace.

Fan Switch

See procedure for checking on Page 20.

Conveyor will not

run(S/N 4390 to

Q190771000 Series)

(S/N 4390-

Q147901200 Series)

Conveyor Switch

Same procedure as for fan switch.

(Dual Belt Ovens)

Dual belt ovens utilize 2 complete independent

conveyor drive systems. The trouble shooting

procedures are the same as single belt ovens,

except that the dual belt ovens use one each of the

following: one "A" D. C. control board and one "B"

D. C. control board.

NOTE:

Speed Adjustment

Potentiometer

This is a 0 to 5 K ohm, 10 turn potentiometer With

power off, remove the red, black and white pot

leads from the motor control board at terminals P1,

P2 and P3. With a digital multimeter, check the

ohm reading across the red lead (P3) to the black

lead (P1). This reading should be 5 K ohms ± 5%

as the pot is rotated from low to high. Place the

meter leads on the red lead (P3) and on the white

lead (P2) Rotating the pot. slowly, from low to high,

the meter reading should show an even transition

from O to 5 K ohms ± 5%. There should be

DC Motor Control Board

Check for 120 VAC input to the control board at

terminals L1 and L2. If not present, check the

conveyor switch and wiring back to 3-amp fuse and

then back to power source if necessary. If 120 VAC

is present at L1 and L2, check the VDC output at

terminals A+ and A-. If a DC voltage is not present,

check the 4 amp and the 1 amp fuses on the

control board. Also reset and check the mini

breaker in the armature line to the gearmotor. If

120 VAC is present at terminals L1 and L2, but DC

voltage is not present at A+ and A-, providing the 1

amp and 4 amp fuses are good, replace the board.

If DC voltage is present at A+ and A-, but motor

does not run, check gear motor as follows.