Scanner Ipu Board Test Points - Ricoh Aficio Color 3006 Service Manual

24 February, 1999
TP No. Signal
TP154 UPHT_TH Analog input from the fusing
thermistor (upper)
TP155 /IACK Used to get an interrupt
vector.
LWHT_TH Analog input from the fusing
TP156
thermistor (lower)
FB_T2 Feedback sense terminal for
TP157
the secondary transfer bias
FB_T1 Feedback sense terminal for
TP158
the primary transfer bias
Feedback sense terminal for
FB_G
TP160
the grid bias
FB_C Feedback sense terminal for
TP162
the charge corona unit bias
FB_BDC Feed back sense terminal for
TP167
the development bias (DC)
TP168 HUM Humidity sensor analog input
TP170 /Z_CROSS Zero-cross interrupt input
TMP Temperature sensor analog
TP172
input
TP173 P_SEN2 Density sensor color output
TP174 P_SEN1 Density sensor black output
TP176 V_SEN Potential sensor analog input
ENGY Enable signal for transition to
TP178
the Energy Star mode
TP182 ANGND Analog ground
TP185 GND Ground
TP186 +5V +5V
TP187 GND Ground

4.6.2 SCANNER IPU BOARD TEST POINTS

TP No. Signal
TP01 GND
TP02 IFGATEL
TP03 GND
TP04 ILSYNCL
TP07 GND
TP09 AGND
TP10 AGND
TP13 AGND
TP14 +5VA
TP15 AGND
TP17 +12VA
Vpeak
TP20
TP21 +5V
TP22 GND
TP23 GND
Description
Description
Ground
Frame gate signal
Ground
Line Sync. signal
Ground
Analog ground
Analog ground
Analog ground
Analog +5V power source
Analog ground
Analog +12V power source
Samples and holds the
image's background level.
5V power source
Ground
Ground
4-23
Stand-by
Remarks
(V)
0 to 5.0
0 to 5.0 Active L
0 to 5.0
0 to 5.0
0 to 5.0
0 to 5.0
0 to 5.0
0 to 5.0
0 to 5.0
0 to 5.0 Active L
0 to 5.0
0 to 5.0
0 to 5.0
0 to 5.0
0 to 5.0 Active H
0
0
5.0
0
Stand-by(V) Remarks
0
0 to 3.3 Active L
0
0 to 3.3 Active L
0
0
0
0
5.0
0
12.0
3.0 to 4.0
5.0
0
0
TP/SW/LED/FUSE
TP
Implementation
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
TP
Implementation
Yes
No
Yes
No
Yes
No
No
No
No
No
No
No
No
Yes
Yes