Olympus OEP-3 Service Manual page 141

6. Head position FG sensor
Route: SE-548 to SE-539 to PRT-13
TP: TP513/PRT-13 board
Function: Detects the number of rotations in a head motor.
Level: Rectangular wave output
SE-548
1 3
C26 C25
PH13 0.01uF 0.01uF
RPI-352 NM NM
2 4
7. Paper feed timing sensor
Route: SE-550 to SE-539 to PRT-13
TP: TP508/PRT-13 board
Function: Discriminates whether print paper was fed properly or whether print paper is not jammed at a
paper feed port in the standby state.
Level: H Print paper exists at a paper feed port.
L Print paper does not exist at a paper feed port.
SE-550
CN11
1 3
C29
PH15
0.01uF
RPI-5100
NM
2 4
8. Delivery timing sensor
Route: SE-551 to SE-539 to PRT-13
TP: TP509/PRT-13 board
Function: Discriminates the mechanical timing during delivery operation and whether print paper is not
jammed at a delivery port.
Level: H Print paper exists at a delivery port.
L Print paper does not exist at a delivery port.
SE-551
CN12
1 3
PH16 C31
C32
0.01uF
GP1S54 0.01uF
NM
NM
2 4
OEP-3 V1 (UC)
SE-539
PRT-13
+5V
+5V
R158
150
CN9 CN102
1P 9P CN150 CN401
2P 10P 17P 14P
3P 11P
GND
SE-539 PRT-13
+5V
+5V
R155
150
CN101
1P 10P CN150 CN401
2P 11P 19P 12P
3P 12P
GND
SE-539 PRT-13
+5V
+5V
R167
150
CN106
1P 1P CN150 CN401
2P 2P 20P 11P
IC406
SN74LV541ANSR
3P 3P
GND
R530
10k
IC5
5 6
17P
IC4
(3/7)
SN74LV14ANSR
R515
10k
IC9
6
14
10P
IC406 (3/9)
SN74LV541ANSR
R516
10k
IC9
7 13
10P
(4/9)
HED_POS_FG
LOAD_TMG
EJCT_TMG
4-33