MUTOH ValueJet Service Manual page 338

Table 9-5 Symptoms and Check Items for Mechanical Serious Errors (Continued)
No. Message
21 E087Err H
Trans Th
22 E090Err
Heater Volt.
23 E 097 error
NVRAM
AP-74109 Rev 1.1
Event/ Check item
symptom
Abnormal Temperature
condition in abnormality of head
head transistor. transistor on main board
or sensor abnormality of
thermistor may be
occurred.
• The input voltage of
AC inlet may be too
high.
• HEATER CONT
board assembly may
be damaged.
Abnormal
condition in
NVRAM.
ValueJet 1304 Service manual
1. Replace thermistor.
2. Replace main
board.
1. Supply power to the
AC inlet with
proper voltage.
2. Replace HEATER
CONT board
assembly.
Replace main board
assembly.
9-24
Action Reference
"4.4.4
Replacing
Heater and
Thermistor
Assembly"
p.4-49
"4.3
Replacement
of Board Base
Section
Components
" p.4-23
"4.3.4
Replacing
HEATER
CONT board
assembly"
p.4-30
"4.3.3
Replacing
Main Board
Assembly"
p.4-29