Sony HCD-GTR888 Service Manual ▷ View online
13
(1) The FLUORESCENT INDICATOR TUBE DRIVER（IC1001）
outputs operation signal to FL display （FL1001） by control signal
from CONTROLLER(IC500).
(2) The Electric voltage for operating FL display （FL1001）is input
from DC/DC convert （T1150）.
(3) The LED lights up by the signal of SYSTEM CONTROLLER and
LED SWITCH CONTROLLER（IC1100）.
<Note>
When SYSTEM CONTROLLER boots up,
DISPLAY
and
LED will
flash up. It
can be used for the confirmation whether the SYSTEM
CONTROLLER has boot up.
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Following are descriptions of the CD Mechanism section.
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15
(1) When the main unit boots up, the tray position of the CD drive is
detected by the Switch S751 on SWITCH BOARD .The signal will
be input to the terminal OPEN_SW of SYSTEM CONTROLLER
(IC500 ).
(2) When tray is not closed, the signal outputs from terminal LM-R of
SYSTEM CONTROLLER to the LD MOTOR DRIVER（IC701).
(3) The signal is sent from the terminal OUT1 or OUT2 of the LD
MOTOR DRIVER to the Loading Motor ,then the Motor drives and
closes the tray. When SYSTEM CONTROLLER detects EJECT
Key input ,the Loading Motor is controlled by upper signal channel.
(4) The position of the turntable in a tray is detected by IC731 on
SENSOR BOARD. The signal is input to terminal TBL-SENCE of
SYSTEM CONTROLLER.
(5) When turntable is rotated, the signal of the terminal TM-F of
SYSTEM CONTROLLER
or TM-R is output to
TBL MOTOR DRIVER
（
IC712).
(6) The signal is sent from the terminal OUT1 or OUT2 of the TBL
MOTOR DRIVER to the Table Motor , then the Motor drives and
rotates the turn table .
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16
Following are descriptions of the BU/ RF/Servo section.
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