Noise - Star Micronics WinType 4000 Technical Manual

3.16 Noise

Step
1 (Initial Check)
Are any parts dirty, broken, malformed, incorrectly
installed or different from those listed in the specifica-
tions?
• Principle Parts to be Checked:
(1) HVPS, (2) MCU PWB, (3) Fuser assembly
(4) LVPS assembly, (5) EP toner cartridge,
(6) Feed roller assembly, (7) Harness assembly P/H
(8) Flat cable LV
2 Has the printer been securely grounded?
3 Is there any noise-generating equipment in the near
vicinity?
4 (Check the flat cable LV.)
Is there continuity between the terminals of the flat
cable LV?
5 (Check the harness assembly P/H.)
Is there continuity between the terminals of the
harness assembly P/H?
6 (Check the LVPS assembly.)
Is there continuity between the P114-1PIN and the
frame of the LVPS assembly?
7 (Check the fuser assembly.)
Is there continuity between the eliminator saw on the
fuser assembly and the frame of the LVPS assembly?
• Check with the fuser assembly installed and the
fuser top cover assembly removed.
8 (Check the fuser assembly.)
Is there continuity between the heat roller and the
frame of the LVPS assembly?
• Check with the fuser assembly installed.
Check
– 147 –
TROUBLESHOOTING
Remedy
YES
Replace the part or
install the part
correctly.
See step 3.
Move the printer to
another place or
remove the noise-
generating equip-
ment.
See step 5.
See step 6.
See step 7.
See step 8.
See step 9.
NO
See step 2.
Securely ground the
printer.
See step 4.
Replace the flat
cable LV.
Replace the harness
assembly P/H.
Replace the LVPS
assembly.
Replace the fuser
assembly.
Replace the fuser
assembly.