Pioneer LD-V4300D Service Manual page 32

• LMCB assembly
@
CN25-Pin 3, 4
When CLOSE : Both UNLOAD and LOAD will be "high "
momentarily when starting.
Later, UNLOAD becomes below waveform and
LOAD becomes "low •, then just before close,
both become "high" again.
5V
r7 r7 r7
ov _J
LJ LJ
L_
When OPEN : While operating, LOAD becomes below
waveform which is opposite the CLOSE
waveform and UNLOAD becomes "low ", then
both of them become "high · just before close.
(j) I Cl - PinlO
OPEN :
48
9V
OV
CLOSE :
1V
OV
5V
r7 r7 r7
ov _J
LJ LJ
L
• BLDB assembly
@Pin 3 of CN42
STAND BY : - 13V
PLA Y :
® Pin 9 of CN46
STAND BY : 10V
PLAY :
®
IC301-Pinll
PLA Y:
5mS/d iv
5V / d iv
10mS/ div
5V / div
5V
r7 r7 r7
ov __J
LJ LJ L -
Q]) IC301 - Pin 2
@
IC301-Pin 1
STAND BY : 16V
PLA Y:
15V
r7 r7 r7
ov - 1
LJ LJ L -