Specifications

5-10 Repair and Troubleshooting Rev. B
Confidential
Troubleshooting
WARNING:
Do not replace the fuse in the Power circuit board assembly. Replacing this fuse may
result in electric shock or fire. This fuse prevents electric shock and fire in the event of
abnormal power supply input; it does not protect the components in the Power circuit
board assembly.
Replace the entire Power circuit board assembly if the fuse blows. Other components in
the Power circuit board assembly are damaged if the fuse has blown.
Symptoms
The table below shows problem symptoms and suggests remedies.
Table 5-4 Troubleshooting table (by symptom)
Symptom Check Item Remedy
POWER LED does not
light
1. Check that power was turned on
correctly.
1. See “Turning the Power On and Off” in
Chapter 3.
2. Check DC output of the Power circuit
board assembly. (See Table 5-11.)
1. Replace the Power circuit board
assembly.
Do not replace the fuse in the Power
circuit board assembly. See the
WARNING on this page.
3. Check the logic circuit power supply
in the main circuit board unit. (See
Table 5-12.)
1. Replace the Main circuit board unit.
2. Replace the Mechanism assembly.
POWER LED lights but
Mechanism assembly
does not make initial
movements.
1. Check DC output of the Power circuit
board assembly. (See Table 5-11.)
1. Replace the Power circuit board
assembly.
2. Check if fuse F1 is blown on the Main
circuit board unit.
1. Replace the Main circuit board unit.
2. Replace the Mechanism assembly.
3. Check the Mechanism assembly
power supply in the Main circuit board
unit. (See Table 5-12.)
1. Replace the Main circuit board unit.
4. None of the above. 1. Replace the Main circuit board unit.
Defective printing
1. Run the nozzle test in the TM-J8000
Service Utility. See the Nozzle Test
section in Chapter 5, “Repair and
Troubleshooting.”
1. Clean the head according to the
instructions in the “Nozzle Test”
section.
2. Check the head rank setting. See
Chapter 6, “Disassembly, Assembly,
and Adjustment.”
1. Correct the setting.
3. Check the LR Adjustment. See
Chapter 6, “Disassembly, Assembly,
and Adjustment.”
1. Adjust the Head LR.
4. None of the above. 1. Replace the Head unit.
2. Replace the Main circuit board unit.
3. Replace the Pump unit.