Pioneer SX-700L Service Manual page 11

VOLlAGE
COMPARATOR
f :
Y
PRESET SWITCBES
Fig. 4-1 Electronic Tuning System
mode while the input signal is maintained at low
level.
o M-U/D (pin 18)
o M-IND(pin 2o)
This output terminal is switched to
low level
during manual tuning mode, ,"rrtiirrg
in the
appearance of an indicator output signal.
o VDD (pin 2t)
The LSI power supply terminal.
o MUTE (pin 22)
This is the muting control signal output terminal
where a high level output signal app"u.s during
preset tuning and band switching operations.
o F-Tune (pin 28)
o Vref (pin 24)
Reference voltage.
o 810 - 81 (pin 2b - pin 84)
The 10-bit up/down counter
output terminals
R - 2 R
L A D D E R R E S I S Î O R
1 0 - 8 I T U P l O O W N C O U N T E R