Canon NP6621 Service Handbook page 101

Symbol Name
Photointerrupter
PS
M
Motor
CL
Clutch
Heater
Cassette driver
ARRANGEMENT AND FUNCTIONS OF THE ELECTRICAL PARTS
Notation
PS1cu Cassette 3 vertical path detection
PS2cu Cassette 3 paper detection
PS3cu Cassette 4 vertical path detection
PS4cu Cassette 4 paper detection
PS5cu Cassette right door open/closed detection
Q561-2 Cassette 3 paper size detection 1
Q562-2 Cassette 3 paper size detection 2
Q563-2 Cassette 3 paper size detection 3
Q564-2 Cassette 3 paper size detection 4
Q561-3 Cassette 4 paper size detection 1
Q562-3 Cassette 4 paper size detection 2
Q563-3 Cassette 4 paper size detection 3
Q564-3 Cassette 4 paper size detection 4
M1cu Cassette unit motor
CL1cu Cassette 3 pick-up clutch
CL2cu Cassette 4 pick-up clutch
H5 Cassette heater
Relay PCB
Table 6-604
Description
6–11