11. ELECTRICAL MECHANISM

11-5-3. Remedy

If a problem No. is reached while carrying out the diagnosis steps in “11-5-2. Diagnosis flowchart”, refer to the table for the corresponding number.After identifying the cause in the “Cause” column, carry out the steps in the “Inspection/Remedy/Adjustment” column, and if a malfunction is found, replace the parts specified in “Replacement if a malfunction”.

Problem No. 1

The power indicator (red) on the power supply P.C. board does not illuminate when the power

switch is turned on.

 

 

 

 

 

 

 

Cause

 

Inspection/Remedy/Adjustment

Replacement if a malfunction

 

 

 

1. If the red LED on the power supply

Check the power cord.

If fuse F1 or F2 is blown,

P.C. board is not illuminated:

• Is fuse F1 or F2 on the power supply P.C.

replace the power supply P.C.

Malfunction of power supply P.C.

board blown?

board or transformer.

board or transformer

 

• Is the primary coil of the transformer burnt

 

 

 

out?

 

 

 

 

2. If the red LED on the power supply

1) Check if the secondary coil of the

Transformer

P.C. board is illuminated:

transformer is burnt out or if there is an

 

Malfunction of transformer, main

open circuit.

 

P.C. board or panel assembly

 

 

If the power indicator (green) on the main P.C.

Main P.C. board

 

 

 

 

board is not illuminated:

 

 

 

2) Check if fuse resistor R25 on the main P.C.

 

 

 

board is blown.

 

 

 

 

 

 

 

If the power indicator (green) on the main P.C.

Main P.C. board or panel

 

 

board is illuminated:

assembly

 

 

3) (Replace the part(s) indicated at right.)

 

 

 

 

 

 

 

Problem No. 2

An error code is displayed when the power switch is turned on.

 

 

 

 

 

 

 

Cause

 

Inspection/Remedy/Adjustment

Replacement if a malfunction

 

 

 

 

1.

When [Err 740] is displayed:

1) Check if thread scraps are blocking the

DC fan motor assembly

 

The cooling fan for the oil pan is

cooling fans (for oil pan and control box).

 

 

disconnected or not operating, or

 

 

 

the cooling fan inside the control

 

 

 

 

 

 

box is not operating.

2) Check that connector P23 (FAN1) and

 

 

 

 

connector P32 (FAN2) are inserted into the

 

 

 

 

main P.C. board.

 

 

 

 

 

2.

When [Err 65] is displayed:

Check that connector P21 (PANEL) is inserted

Panel assembly

 

One of the keys on the operation

into the main P.C. board.

 

 

panel is still depressed.

 

 

 

 

 

 

3.

When [Err 95] is displayed:

Return the treadle to the neutral position and

Treadle unit

 

Power switch was turned on while

turn the power switch off and back on again to

 

 

treadle was depressed.

check.

 

4.

When [Err 90] is displayed:

Check that connector P11 (PEDAL) is inserted

Treadle unit

 

Poor connection for treadle unit

into the main P.C. board.

 

 

connector

 

 

 

 

 

 

 

 

 

 

 

97

Z-8550A, 8560A