Schematic Diagram; Terminal Function Of Ics; Ic901 (C2Bbfd000404): System Control/Fl Drive - Technics RS-DV290EG Service Manual

9. Schematic Diagram

10. Printed Circuit Board Diagram
11. Block Diagram
12. Wiring Connection Diagram

13. Terminal Function of ICs

13.1. IC901 (C2BBFD000404): System Control/FL Drive

Pin I/O
Terminal
No.
Name
1 CHECK I
2 LC72 DO O
3 LC72 CE O
4 LC72 DI/ I
ST
5 LC72 CK O
6 ST/ O
AV.6CH
7 NC —
8
9 SEL —
TUNER
10 SEL/ —
TUNER
11 AC IN I
12 RESET I
13 X IN I
14 X OUT O
15 V —
SS
16 XC IN I
17 XC OUT O
18 V 1 I
DD
19 KEY TU I
20 KEY I
KARAOKE
Function
Clock check signal input
PLL data signal output for
tuner unit (Z101)
Chip enable signal output
for tuner unit (Z101)
IF count data/stereo detect
signal input from tuner unit
(Z101)
Clock signal output for
tuner unit (Z101)
Signal select output
Not used, open
Not used, open
Not used, connected to GND
Power failure detect signal
input
Reset signal input
Oscillator connected
terminal (32.7kHz)
GND terminal
Oscillator connected
terminal (6 MHz)
Power supply terminal
Operation key signal input
Operation key signal input
18