1-10-32
1-10-33
HG490SCM1
THE SAME VOLTAGE FOR
BOTH PLAY & REC MODES.
INDICATES THAT THE VOLTAGE
IS NOT CONSISTENT HERE.
MODE:
SP/REC
PLAY MODE
REC MODE
1
2
3
5.0
5.0
(2.5)
~
“ “ = SMD
Main 1/7 Schematic Diagram
IC501 KEY VOLTAGE CHART
0.00 ~ 0.51V
POWER
STOP/EJECT
0.51 ~ 0.92V
CH DOWN
REW
0.92 ~ 1.27V
CH UP
PLAY
1.27 ~ 1.61V
----------------
FF
1.61 ~ 1.98V
----------------
--------------
1.98 ~ 2.39V
REC/OTR
--------------
2.39 ~ 2.90V
----------------
--------------
2.90 ~ 3.60V
SENS-INH
--------------
3.60 ~ 4.30V
----------------
--------------
4.30 ~ 5.00V
KEY OFF
KEY OFF
Pin No.
Voltage
KEY 1 (7 PIN)
KEY 2 (8 PIN)
Comparison Chart of
Models and Marks
MODEL
MARK
VR750/02
F
VR750/07
G
VR750/16
H
VR750/58
I
VR752/07
J
VR752/16
K
VR752/58
L