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6-1. Detection Switch
Fig. 6-1. shows the detection switches connected to the system controller (IC801) and switch matrix for differentiating the
mode. This unit comes without the part enclosed in the dotted lines in (a) of the same figure which were provided with the
3rd generation unit, namely LIMITIN (detects the innermost circumference of the optical block), REFLECT (detects the
reflectivity rate of the disc), and the switches for differentiating and detecting the battery. Due to the omission of these parts,
focus search after disc replacement, etc. is performed at other than the innermost circumference in this unit. When the servo
turns ON, and data can be read from the disc, TOC accessing is performed based on the address.
Moreover, the differentiation of the MO or playback only disc which was performed by the reflectance rate detection switch
is performed in this unit by alternately switching the internal gain and laser power settings of the RF amplifier during focus
search, and detecting at which of these settings the focus turns ON.
(Details of differentiation of the disc are provided in 8-3. Focus Search and Disc Differentiation.)
As this unit uses a single voltage and does not have a recharge function, it is not mounted with a switch for differentiating and
detecting the battery.
At the ON and OFF of the open/close switch (S801), the wakeup (startup) and sleep (standby) operations of the power supply
are controlled, and at the same time, clearing of the address data of the stop position used by the resume function is performed.
6. SYSTEM CONTROL
SYSTEM CONTROLLER
13 HOLD
HOLD
54
AVLS
AVLS
14
OPEN/CLOSE
OPEN/CLOSE
9
INSL
INLIMIT
82
REFLCT
REFLECT
15 AM3/NI
AM3/NI DET
(a) Example of MZ-E3
IC801
SYSTEM CONTROLLER
14
HOLD SW
HOLD
S802
29
AVLS SW
AVLS
S805
6
OPN/CLS SW
OPEN/CLOSE
S801
Fig. 6-1. Detection Switch Connected to System Controller
IC801
PLAY
55
PLAY
SWITCH
KEY0
57
MATRIX
REMOTE CONTROLLER
KEY1
49
(SWITCH MATRIX)
PLAY
5
KEY
PLAY
SWITCH
SET
8
KEY
MATRIX
REMOTE CONTROLLER
RMC
7
UNIT
KEY
(SWITCH MATRIX)
(b) MZ-E30
— 27 —
UNIT
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