![background image](http://html.mh-extra.com/html/sony/hcd-m70/hcd-m70_service-manual_420801034.webp)
34
HCD-M70
6-18.
IC PIN FUNCTION DESCRIPTION
•
MAIN BOARD IC801 CXP83124A-053Q (SYSTEM CONTROLLER)
Pin No.
Pin Name
I/O
Description
1
SENSOR
I
Tape end detect switch input terminal “H” input when the tape end detected
2
RDS-IN
I
Serial data transfer clock signal input from the RDS decoder
(RDS decoder is used for the AEP and UK models)
3
SIRCS
I
Sircs remote control signal input
4
NC
—
Not used
5
TU-DATA O
Serial data output to the tuner unit
6
T-MODE
I
Head position detect switch input terminal “L”: forward direction, “H”: reverse direction
7
REG-CON
O
Main system power supply on/off control signal output “H”: power on
8
C-CLK/TU-CLK
O
Serial data transfer clock signal output to the digital signal processor (at CD function)
Serial data transfer clock signal output to the tuner unit (at tuner function)
9
SPK PROTECT
I
Protect on/off control signal input from the speaker protect circuit “L”: protect on
10
CD-DATA O
Serial data output to the digital signal processor
11
C-SQCK
O
Subcode Q data reading clock signal output to the digital signal processor
12
C-SQSO/
RDS-DATA
I
Subcode Q data input from the digital signal processor (at CD function)
Serial data input from the RDS decoder (at tuner function)
(RDS decoder is used for the AEP and UK models)
13
HOLD
O
Automatic power control hold signal output to the RF amplifier
14
ALC
O
Automatic limiter control signal output to the recording/playback equalizer amplifier
“H”: limiter on
15
CD-ON
O
Power supply on/off control signal output for the CD section (+5V)
LED drive signal output of the CD
indicator “H”: CD power on (LED on)
16
REC-MUTE
O
Recording muting on/off control signal output to the recording/playback equalizer amplifier
“L”: muting on
17
TUNED
I
Automatic limiter control signal input from the tuner unit
18
C-SENSE
I
Internal status detection monitor input from the digital signal processor
19
C-LATCH
O
Serial data latch pulse signal output to the digital signal processor
20
L-MUTE
O
Line muting on/off control signal output to the recording/playback equalizer amplifier
“H”: muting on
21
REC/PB
O
Recording/playback selection signal output to the tape section
“L”: playback mode, “H”: recording mode
22
AMP-MUTE
O
Muting on/off control signal output to the power amplifier “H”: muting on
23
TU-COUNT
I
PLL serial data input from the tuner unit
24
H/P CHK
I
Headphone jack connection detection signal input terminal
“L”: no connected, “H”: headphone connected
25
TU-ON
O
Power supply on/off control signal output for the tuner section (+9.5V)
LED drive signal output of the TUNER indicator “H”: tuner power on (LED on)
26
DSG
O
LED drive signal output of the DSG (Dynamic Sound Generator) indicator “H”: LED on
27
CD-SYNC
O
LED drive signal output of the CD SYNCHRO indicator “H”: LED on
28
SCK
O
Serial data transfer clock signal output to the electrical volume
29
SOL-CON
O
Trigger plunger on/off control signal output “H”: plunger on
30
MOT-CON
O
Capstan/reel motor on/off control signal output “H”: motor on
31
TU-CE
O
Chip enable signal output to the tuner unit
32
TC-SW
I
Half detect (side A and B) switch and cassette in detect switch input terminal (A/D input)
33
TRAY-SW
I
Disc tray open/close detect switch input terminal (A/D input)
“L”: disc tray open, “H”: disc tray close
34 to 36
KEY3 to KEY1
I
Key input terminal (A/D input)
37
SIMUKE
I
Destination setting terminal (A/D input)
Содержание HCD-M70
Страница 53: ...53 HCD M70 MEMO ...