Service manual

3. TP/FUSE/LED/SW
3.1 TEST POINT
Main Control Board
No. Signal Description
Stand-by
(V)
Note
TP201 GND Ground
TP202 SS_RXD
Received serial signal
from the sorter stapler
0 to 5.0 V
TP203 TV
Temparature sensor
output
2.0 to 4.0 V
TP204 RHV Humidity sensor output 1.0 to4.0 V
TP205 FB_TP
Feed back data from the
high voltage supply
board: Paper transfer
–4
±
0.2 V
When the paper transfer
current is applied with
800
µ
A, this value will be
measured with the
resistance 100 k
Ω
.
TP206 FB_TB
Feed back data from the
high voltage supply
board: Belt transfer
–4
±
0.2 V
When the belt transfer
current is applied with
600
µ
A, this value will be
measured with the
resistance 100 k
Ω
.
TP207 FB_B
Feed back data from the
high voltage supply
board: Developmet bias
–4.002
±
0.08 V
When the development
roller is applied with -800
V, this value will be
measured with the
resistance 100 k
Ω
.
TP208 FB_G
Feed back data from the
high voltage supply
board: Grid voltage
–3.993
±
0.08 V
When the grid of the
corona charge unit is
applied with -900 V, this
value will be measured
with the resistance 100
k
Ω
.
TP209 FB_C
Feed back data from the
high voltage supply
board: Main corona
charge voltage
4
±
0.2 V
When the main corona
charge is applied with
–850
µ
A, this value will
be measured with the
resistance 100 k
Ω
.
TP210 TH_U
Fusing (Hot roller)
thermistor output
TP211 TH_L
Pressure roller
thermistor output
TP212 GND Ground
TP213 V_SEN
Drum potential sensor
output
0 to 0.1 V
When the machine is in
stand-by mode.
0 to 4.5 V
When the drum potential
sensor detects the
sensor pattern for the
toner supply control.
TP/FUSE/LED/SW
A166/A187/A189 4-30 SM
CÓPIA NÃO CONTROLADA
CÓPIA NÃO CONTROLADA