12
TROUBLESHOOTING
The following chart is included to aid in troubleshooting your 301
instrument. Use care to avoid danger of electrical shock when
troubleshooting or performing any type of maintenance. Only qualified
technicians should perform repairs.
WARNING: D
ISCONNECT POWER BEFORE REPLACING PARTS
.
PROBLEM
CAUSE
REMEDY
Unit keeps blowing
fuses (500ma for 301)
(400ma for 301X)
Fuse loose in holder
Short in p.c. board
Short in wiring
Short in ballast
Short in transformer
Tighten fuse holder
*
*
*
*
Unit display will not
turn on
Unit not nulled
Blown fuse
Loose connector(s)
Faulty P.C. board
Faulty switch
Bad transformer winding
Open wiring
Null unit
Replace fuse
Re-seat connector(s)
*
*
*
*
Light source will not
illuminate
Blown fuse
Loose connector(s)
Faulty Lamp P.C. board
Faulty switch
Bad transformer winding
Open wiring
Replace fuse
Re-seat connector(s)
*
*
*
*
Unit will not Null
Faulty light source
Faulty P.C. board
Faulty null switch
Loose connector(s)
Faulty sensor wiring
Faulty sensor(s)
(See light source)
*
Replace switch
Re-seat connector
*
*
*
= Contact X-Rite Instrument Services or an authorized service center for
repair.
Summary of Contents for 301
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