Panasonic AG-DV2500P, Service Manual

Page: 154 / 306

4-3
(2) Mini Cassette Incorrect Insertion Prevention Function
Fig. 4.2.5 Sub Flap
Sub flaps are attached on the cassette guide assembly located on the bottom end of the cassette housing door. These two sub flaps
are designed to open when both are pressed simultaneously, and in the case of a mini cassette it is impossible for both to be pressed
at the same time. So even if an inserted mini cassette touches against one of the sub flaps, the sub flaps will act as a brake to prevent
erroneous loading of a mini cassette.
Intake : When a cassette is inserted, the HW switch goes OFF, which causes detection of cassette insertion. After this the
motor begins intake action.
Intake complete : When cassette intake is completed, in conjunction with the housing movement the main deck’s switch lever
slides, causing the MECHA board S3 (cassette switch) to be pressed, and intake completion is detected.
(See Fig. 4.2.7)
Eject : When ejecting the cassette, both switches HW and HW2 are momentarily ON, and eject completion is detected.
And from here, it returns to the initial status of switch HW=ON, HW2=OFF.
Sub Flap
HW
HW2
Fig. 4.2.6 Cassette Housing Switch Table 4.2.1
Mode HW HW2 S3
EJECT (Initial) ON OFF OFF
INTAKE Detect OFF OFF OFF
INTAKE END OFF OFF ON
EJECT END ON ON OFF
CAUTION
Even with standard cassettes, if the cassette is inserted skewed or diagonally offset in relation to the sub flaps, the sub flaps may
not open and cassette insertion may not be possible. When inserting a standard cassette, be sure to insert so that the sides are
parallel to the sub flaps.
(3) Intake/Eject Detection
Two housing switches (HW, HW2) are equipped on the front left side of the main deck. (See Fig. 4.2.6)
In the initial status in which no cassette is inserted (NO cassette mode), switch HW is pressed and switch HW2 is not pressed.