Technics SL-PS740A - Connected to GND

SL-PS740A |
¢1C401 (UPD78043G015) System control. & FL drive
Function
Division
FL grid signal
Function
Synchro rec. control terminal
Drop-out detect signal
Power supply terminal
Sub-code Q register clock
Not connected
I | Sub-code Q data
Loading motor control signal
H: OPEN, L: CLOSE
Control bits for off-, catch-, play-
VO status and DAC output current
Reset signal input
;
0 On off control and ready signal
Redial error digital signal devided
by four
ie)
_— GND terminal
ENABLE | | Synchro rec. control terminal
| 22 | P16 I Level meter selector
! Not connected
Disc holder open/close det. terminal
Not connected
Spindle servo phase synchro signal
(“H": CLV, “L”: Rough servo)
Tracking servo ON signal
("L": ON)
Radial error digital
IC (MN6626) command data signal
IC (MN6626) command clock signal
Sub-code block clock
Track loss input
Status signal
(CRC, CUE, CLVS, TTSTOP,
FCLV, SQOkK)
Muting output (“"H": MUTE)
Emphasis signal
(“H": EMPHASIS ON)
Power supply terminal
Key return signal
Power supply terminal
Connected to GND
Not connected
System clock input/output
(f=4.2336 MHz)
Not connected
FL segment signal and key scan
signal
Power Supply terminal! for FL drive
FL segment signal
FL grid signal
aigo's