Pioneer AVX-505, Service Manual

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68
AVX-505
- Outline of operation
1. The system operates by using the forward/backward
driving motor and the angle controlling motor.
2. To detect statuses and positions of operation, the
system detects pulses by the photointerrupter and
counts the pulses constantly.
3. The monitor is temporarily stored when the system is
restarted by the Reset button. Then, the system
ejects the monitor again and starts up.
4. The system adjusts angle of the monitor when the
Adjust Angle key is pressed.
5. The system stores the monitor when the
OPEN/CLOSE key is pressed again or ACC is set to
OFF.
-
Ejection
1. The system operates the position motor in Fast mode
when the OPEN/CLOSE key is pressed or ACC is set
to ON.
2. The system stops the position motor and operates
the angle motor in high speed when the Position
Sensing switch (Lift switch) in the forward/backward
direction is set to OFF.
3. The system stops the angle motor after the angle
encoder pulses are output for 12 waves (Brake
mode). If the previous angle is saved in the memory,
the system moves the angle motor to that angle.
4. The system operates the position motor at low speed
approximately 1 second after the monitor is
positioned at the specified angle. Operation stops
mechanically when the motor withdraws. Then, the
system enters Brake mode by the error timer.
- Electrical conditions
1. Motor terminal voltage (position motor for ejection,
and angle motor for angling)
Fast mode: V
MH
= 7.0 V
Slow mode: V
ML
= 6.2 V
2. Encoder pulse
Conditions for input to controlling microcomputer
: H = 5 V, L = 0 V
Error timer (time to judge no more pulse is output)
: 1 sec
Lift switch OFF.
12th wave or
the position
saved in the
memory.
Withdraws slowly.
Comes in contact
mechanically.
7.3 EXPLANATION
7.3.1 MECHANISM DESCRIPTIONS