Denon RCD-M40 Service Manual page 42

5. CD Playback
Q5 L RCK
Q6 B ICK
Q7 S DTI
STANDARD GND
WF12 (9)
6. USB playback
Q3 D +
Q4 D -
STANDARD GND
CN83 (5)
7. LOADER OPEN-CLOSE
o OPSW
Q0 F CLSW
Q2 L OAD-
Q1 L OAD+
STANDARD GND
OPEN
42
CLOSE