Panasonic UF-5500, Service Manual

Page: 67 / 365

67
UF-5500 / 4500
The fuser and developer start working.
The temperature control starts working.
Detection
6
Checks the temperature of 235
㷄
or above.
(The detection takes place every 10 msec.)
Detection
7
Checks the short of the thermistor (AD: 0). (The detection takes place every 10 msec.)
Detection
8
When the unit can not be controlled by the software, it should be stopped forcibly by the hardware(ASIC). (250
㷄
)
Detection
9
Thermostat temperature reached 160
㷄
.
Paper is picked up.
When one of the followings happened, processing glitches are executed and unit goes to "Info Code; 021". [Low temperature detection] Detection
1
: The AD value of the temperature does not go up 4 or more in 10 sec.
after the heater is turned ON. Detection
2
: The temperature does not reach primary stable temperature (170
㷄
)
within 50sec after the heater is turned ON. Detection
3
: The temperature does not reach the secondary stable temperature
(170
㷄㪆
205
㷄
) within 70sec from primary stable temperature (170
㷄
).
Detection
4
: The temperature decreased 40deg (130
㷄
/165
㷄
) or more by the temperature
control after reaching the secondary stable temperature (170
㷄㪆
205
㷄
).
Detection
5
: The temperature does not reach the primary stable temperature (170
㷄
)
within 35sec from detection temperature 1 (70
㷄
).
[High temperature detection] Detection
6
: During printing the temperature became 235
㷄
or above.
Detection
7
: During printing the short of the thermistor (AD: 0) was detected.
Detection
8
: When the unit can not be controlled by the software, it should be stopped
forcibly by the hardware (250
㷄
).
Detection
9
: The thermostat temperature reached 160
㷄
.
Detection
j : When the unit can not be controlled by the software,it should be stopped
forcibly by the hardware(comparator).(240
㷄㪀
Detection
j
When the unit can not be controlled by the software,it should be stopped forcibly by the hardware(comparator).(240
㷄
)
10sec
0sec
50sec
Detection temperature 3
䋨
235
㷄䋩㩷
Detection temperature 5
䋨
250
㷄䋩
S
e
co
nd
ar
y
st
ab
le
te
mpe
ra
tu
re
(170
㷄㪆
20
5
㷄䋩
Detection temperature 2
䋨
130
㷄㪆
165
㷄䋩
Primary stable
temperature
䋨
170
㷄䋩
Detection temperature 1
䋨
70
㷄䋩
120sec
Detection
2
The temper
ature does not reach the
pr
imar
y stab
le temper
ature (170
㷄
) within
50sec after the heater is tur
ned ON.
Heater is tur
ned ON.
Detection
3
The temper
ature does not reach the secondar
y
stab
le temper
ature (170
㷄㪆
205
㷄
) within 70sec
from pr
imar
y stab
le temper
ature (170
㷄
).
Detection
5
The temper
ature does not reach the pr
imar
y stab
le temper
ature
(170
㷄
) within 35sec from detection temper
ature1 (70
㷄
).
Detection
1
The AD v
alue of the temper
ature does not go up
4 or more in 10sec after the heater is tur
ned ON.
Detection
4
Checks that the temperature decreased 40 deg (130
㷄㪆
165
㷄
) or more from the
secondary stable temperature. (The detection takes place every 10 msec.)
Detection temperature 4
䋨
240
㷄䋩㩷