UES-40
ISSUE4 2-3 Troubleshooting
(Continued next page)
ëÊ2èÕ Troubleshooting
1-1 Troubleshooting list
Problem
Parts That Might Have Caused the Problem
Oscillation
board
Monitor
board
Relay
board
Control
board
Panel
sheet
Converter Harnesses Other Other than main unit
Power-on
problem
Converter fan unresponsive — — — — — 1 Converter – Power switch Power switch —
Power-switch LED remains unlit. — — — 3 2 1 Converter – Oscillation board (J2) Power switch —
Oscillation board (J4) – Control board (J5)
Control board (J2) – Panel sheet
No startup sound — 2 — 1 — 3 Oscillation board (J3) – Monitor board (J5) — —
Monitor board (J2) – Speaker
Monitor board (J16) – Control board (J1)
All panel lights remain unlit. — — — 1 2 — Control board (J2) – Panel sheet — —
All panel lights remain lit. — — — 1 2 — — — —
No response
even when the
output
switches
*
2
are
pressed
All output switches
including the hand-
piece and foot
switch are unre-
sponsive.
No sound — 2 — 1 — — — — —
LEDs remain unlit. — — — 1 2 — — — —
No sound, LEDs
remain unlit.
—2—1—— — — —
Handpiece switch
unresponsive (but
foot switch works)
No sound — 1 — 2 — — — — —
LEDs remain unlit. — — — 1 2 — — — —
No sound, LEDs
remain unlit.
—132—— — — —
Foot switch unre-
sponsive (but
handpiece switch
works)
No sound — 1 — 2 — — — — —
LEDs remain unlit. — — — 1 2 — — — —
No sound, LEDs
remain unlit.
—1—2—— — — —
Switch unrespon-
sive when using
handpiece con-
nector 1
No sound — 1 — 2 — — — — —
LEDs remain unlit. — — — 1 2 — — — —
No sound, LEDs
remain unlit.
— 1 3 2 — — — Front port
part
Handpiece switch damage
Switch unrespon-
sive when using
handpiece con-
nector 2
No sound — 1 — 2 — — — — —
LEDs remain unlit. — — — 1 2 — — — —
No sound, LEDs
remain unlit.
— 1 3 2 — — — Front port
part
Handpiece switch damage
Foot switch (MAJ-
1258) unrespon-
sive
No sound — 1 — 2 — — — — —
LEDs remain unlit. — — — 1 2 — — — —
No sound, LEDs
remain unlit.
— 1 3 2 — — Monitor board (J1) – Foot switch (MAJ-1258) Foot switch
(MAJ-1258)
port part
Foot-switch
damage
Bipolar foot switch
(MAJ-1259) unre-
sponsive
No sound — 1 — 2 — — — — —
LEDs remain unlit. — — — 1 2 — — — —
No sound, LEDs
remain unlit.
— 1 3 2 — — Monitor board (J1) – Foot switch (MAJ-1259) Foot switch
(MAJ-1259)
port part
Foot-switch
damage
*
1
*1 The numbers indicate the relative likelihood that this is the affected unit. These numbered units may be damaged.
*2 Foot-switch cutting or coagulation pedal and handpiece output switch