VIBRATION METER - TROUBLE SHOOTING
NOTE: Make all checks using ohmmeter and with ignition key in "off" position, except as noted.
PROBLEM
POSSIBLE CAUSE
SOLUTION
Meter reads very low.
Core stack gap may be too wide.
Shim to adjust gap to .010".
Primary ground connection may be
Inspect and repair if connection is not
bad.
good.
Meter does not operate.
Power supply may not be intact.
Check in control box for 12V DC
across terminals H1 and H2. (Key
"on" for this check.)
Actuating arm or link may be
Inspect (at right end of roll) - repair or
damaged.
replace damaged parts.
Wire cord may have internal break.
Check for continuity - replace entire
cord assembly if continuity does not
exist.
Coil may be burned out. (At actuating
Check primary winding (H1-H2) should
arm)
read approximately 26 ohms. Check
secondary winding (X1-X2) - should
read approximately 1400 ohms. If
either reading has very
high
resistance, coil is burned out and
should be replaced.
Rectifier may be burned out.
(In
Disconnect either terminal #7 or #8.
control box)
Check resistance across 7 and 8.
Then interchange probes and again
check resistance. If both resistances
are fairly close in value, rectifier needs
replacing.
Choke may be burned out.
Check across leads. If resistance is
high, choke needs replacing. (Normal
resistance is approximately 1 ohm.)
Meter proper may be burned out.
Do not check with ohmmeter.
If
everything else checks out and meter
needle does not deflect when turned
"on", meter needs replacing.
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