1-7-1
HE274SNA
SIGNAL NAME ABBREVIATIONS
Signal Name
Function
4.43MHz
4.43MHz Clock
A-COM
Audio Head Common
A-IN
Audio Signal Input
A-MODE
Hi-Fi Tape Detection Signal
A-MUTE-H
Audio Mute Control Signal
(Mute = “H”)
A-OUT
Audio Signal Output
A-PB/REC
Normal Audio Play Back/Record
Signal
AE-H
Audio Erase Head
AFC
Automatic Frequency Control
Signal
AL+12V
12V with AC Plug
Connected
AL+5V
5V with AC Plug
Connected
AMPC
CTL AMP Connected Terminal
AMPVcc
AMPVcc
AMPVREF
OUT
V-Ref for CTL AMP
AMPVREF
IN
V-Ref for CTL AMP
AMPVss
AMPVss
AVcc
A/D Converter Power Input/
Standard Voltage Input
C-CONT
Capstan Motor Control Signal
C-F/R
Capstan Motor FWD/REV Control
Signal (FWD=”L”/REV=”H”)
C-FG
Capstan Motor Rotation Detection
Pulse
C-ROTA
Color Phase Rotary Changeover
SIgnal
C-SYNC
Composite Synchronized Pulse
CLKSEL
Clock Select (GND)
COLOR-IN
SECAM or MESECAM Chroma
Video Input Signal at Super
Impose
CTL (+)
Playback/Record Control Signal
(+)
CTL (-)
Playback/Record Control Signal (-
)
CTLAMPout
To Monitor for CTL AMP Output
D-CONT
Drum Motor Control Signal
D-PFG
Drum Motor Phase/Frequency
Generator
D-REC-H
Delayed Record Signal
D-V- SYNC
Dummy V-sync Output
DRV-CLK
LED Clock Driver IC Control Clock
DRV-DATA
LED Clock Driver IC Control Data
DRV-STB
LED Clock Driver IC Chip Select
Signal
END-S
Tape End Position Detect Signal
FE-H GND
Ground for Full Erase Head
FF/REW-L
CTL Frequency Characteristics
Switching Signal (FF/REW=”L”)
FSC-IN
[4.43MHz]
4.43MHz Clock Input
H-A-COMP
Head Amp Comparator Signal
H-A-SW
Video Head Amp Switching Pulse
Hi-Fi-A Hi-Fi
Audio
Head
Hi-Fi-COM
Hi-Fi Audio Head Common
HiFi-H-SW
HiFi Audio Head Switching Pulse
HLF
LPF Connected
Terminal (Slicer)
I
2
C BUS- SCL
I
2
C BUS Control Clock
I
2
C BUS- SDA
I
2
C BUS Control Data
KEY-1
Key Scan Input Signal 1
KEY-2
Key Scan Input Signal 2
LD-SW
Deck Mode Position Detector
Signal
LM-FWD/REV
Loading Motor Control Signal
MOD-A
Modulator Audio Output Signal
N-A-PB
Normal Audio Playback
N-A-REC
Normal Audio Recording
OSC
IN
Clock Input for letter size
OSC
OUT
Clock Output for letter size
OSD-V-IN
OSD Video Signal Input
OSD-V-OUT
OSD Video Signal Output
OSDVcc
OSDVcc
OSDVss
OSDVss
P-DOWN-L
Power Voltage Down Detector
Signal
Signal Name
Function
