Olympus OEP-3 Service Manual page 142

9. Paper feed FG sensor
Route: SE-552 to SE-539 to PRT-13
TP: TP515/PRT-13 board
Function: Detects the amount of print paper fed to the platen chuck position through a paper feed timing
sensor.
Level: Rectangular wave output
SE-552
CN13
1P
1 3
2P
C33
PH17 C34
0.01uF
0.01uF
GP1S54
NM
NM
2 4
3P
10. Paper sensor
Route: SE-553 to SE-539 to PRT-13
TP: TP511/PRT-13 board
Function: Discriminates whether the paper feed tray or print paper is set.
Level: H Print paper is set, or a paper feed tray is set, but no print paper exists.
L Print paper does not exist and a paper feed tray is not set.
SE-553
CN14
1P
1 3
C36
C35
2P
0.01uF
0.01uF
PH18
NM
NM
GP1S54
2 4
3P
4-34
SE-539 PRT-13
+5V
+5V
R529
R154
10k
150
CN101
7P CN150 CN401
8P 16P 15P 11 10
IC4
(5/7)
SN74LV14ANSR
9P
GND
SE-539 PRT-13
+5V
+5V
R525
R159
10k
150
CN103
1P CN150 CN401
2P 10P 21P 4 16
IC406
(5/9)
SN74LV541ANSR
3P
GND
IC5
90P
LOAD_FG
IC9
12P
PAPER
OEP-3 V1 (UC)