Signal Name Abbreviations - Philips VR340/55 Service Manual

Signal Name
4.43MHz 4.43MHz Clock
A-COM Audio Head Common
A-IN Audio Signal Input
A-MODE Hi-Fi Tape Detection Signal
Audio Mute Control Signal
A-MUTE-H
(Mute = "H")
A-OUT Audio Signal Output
Normal Audio Play Back/Record
A-PB/REC
Signal
AE-H Audio Erase Head
Automatic Frequency Control
AFC
Signal
Always +12V with AC Plug
AL+12V
Connected
Always +5V with AC Plug
AL+5V
Connected
AMPC CTL AMP Connected Terminal
AMPVcc AMPVcc
AMPVREF
V-Ref for CTL AMP
OUT
AMPVREF V-Ref for CTL AMP
IN
AMPVss AMPVss
A/D Converter Power Input/
AVcc
Standard Voltage Input
C-CONT Capstan Motor Control Signal
Capstan Motor FWD/REV Control
C-F/R
Signal (FWD="L"/REV="H")
Capstan Motor Rotation Detection
C-FG
Pulse
Color Phase Rotary Changeover
C-ROTA
SIgnal
C-SYNC Composite Synchronized Pulse
CLKSEL Clock Select (GND)
SECAM or MESECAM Chroma
COLOR-IN Video Input Signal at Super
Impose
Playback/Record Control Signal
CTL (+)
(+)
Playback/Record Control Signal (-
CTL (-)
)
CTLAMPout To Monitor for CTL AMP Output
D-CONT Drum Motor Control Signal

SIGNAL NAME ABBREVIATIONS

Function
Signal Name
D-PFG
D-REC-H
D-V- SYNC
DRV-CLK
DRV-DATA
DRV-STB
END-S
FE-H GND
FF/REW-L
FSC-IN
[4.43MHz]
H-A-COMP
H-A-SW
Hi-Fi-A
Hi-Fi-COM
HiFi-H-SW
HLF
2
I C BUS- SCL
2
I C BUS- SDA
KEY-1
KEY-2
LD-SW
LM-FWD/REV
MOD-A
N-A-PB
N-A-REC
OSC
IN
OSC
OUT
OSD-V-IN
OSD-V-OUT
OSDVcc
OSDVss
P-DOWN-L
1-7-1
Function
Drum Motor Phase/Frequency
Generator
Delayed Record Signal
Dummy V-sync Output
LED Clock Driver IC Control Clock
LED Clock Driver IC Control Data
LED Clock Driver IC Chip Select
Signal
Tape End Position Detect Signal
Ground for Full Erase Head
CTL Frequency Characteristics
Switching Signal (FF/REW="L")
4.43MHz Clock Input
Head Amp Comparator Signal
Video Head Amp Switching Pulse
Hi-Fi Audio Head
Hi-Fi Audio Head Common
HiFi Audio Head Switching Pulse
LPF Connected
Terminal (Slicer)
2
I C BUS Control Clock
2
I C BUS Control Data
Key Scan Input Signal 1
Key Scan Input Signal 2
Deck Mode Position Detector
Signal
Loading Motor Control Signal
Modulator Audio Output Signal
Normal Audio Playback
Normal Audio Recording
Clock Input for letter size
Clock Output for letter size
OSD Video Signal Input
OSD Video Signal Output
OSDVcc
OSDVss
Power Voltage Down Detector
Signal
HE274SNA