Traymecha Control - Sharp DV-500D Technical Manual

5. TRAYMECHA Control

5-1 Position of TRAYMECHA
The TRAHMECHA position is detected by turning on 5 of SW.
However, there are some cases when the position of the TRAYMECHA cannot be detected with
SW input information only. In such a case, it is possible to specify the position from the condition
of the SW input change when tray motor is rotated one direction or the other.
The following are the input conditions responding to each TRAYMECHA position.
Terms in parenthesis show the condition of switches responding to the tray 2 side.
5 of SW input
SW2A, SW2B, SW1A, SW1B, MECHSW
1. Tray 1, 2 open/close
(1) Open Tray Position
Position where SW2B (SW1B) fall is detected while tray discharge is activating.
(2) Tray Insert/Discharge Position
Both SW2B (SW1B), SW2A (SW1A) are under condition "H", and during this period
(while the motor is rotating), MECHASW does not change from "H" (while Tray 2 is
in action) or "L" (while Tray 1 is in action).
(3) Closed Tray Position
The position where SW2A (SW1A) fall is detected while the tray is activating.
Note: While Tray 1 is in action, disc reproduction is possible when MECHASW is "L"
SW2B i SW1B j
SW2A i SW1A j
and PICKMECHA is on the Tray 2 side. On the other hand, while Tray 2 is in
action, disc reproduction is possible when MECHASW is "H" and PICKMECHA
is on the Tray 1 side
Direction of tray insertion
a b c
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DVD-Series