Teac MT-20D-IO - Page 31

3-3-2 Other control circuits
Fig. 313 shows the block diagram of the other control circuits •
050
TSI
TSO
CLD
BOT/EOT
FPT
• --------1
I
I
I I
I
SELECT
I
r-!-
I
I I
I
I
TPI4
5V,12V
I
LOW
I
I
VOLT.AGE
I
I
SENSE
I
CRII
I
I
I
POWER ON
I
RESET
I
I
L-----
1
I
I
"""--
I
L-----1
READY
I
I
I
I
I
I
TPI3
I
*
I
i
I
I
I
HOLE
I
I
SENSOR
I
I
I
I
I
I
I
I
I
I
FILE
I
I
PROTECT
I
SENSOR
I I
~ ~ - - - - - ..J TP21
i------l T -=-i
DOWN
I SOLENOID I 1
I DRIVER I
I
I
TROI2
TR 1/3
TRO
LVS
POR
ROY
ACK
HOL
FP
SOLENOID.
HEAD SHIFT
Fig. 313 Other control circuits block diagram
There are a select. low voltage sens. power ON reset. ready, hole sensor,
file protect sensor. and solenoid driver as the other control circuits.
The select outputs a head shift solenoid control signal and track changeover
signal. according to the drive select signal and track select signal given
from the PCBA interface control. The low voltage sense monitors both the
power voltages of 5 V and 12 V. and outputs an LVS signal when an excessive
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