Philips VR550 - Page 28

1-10-3
1-10-4
HG470SCM1
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 1/6 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
VR550/02 A
VR550/07 B
VR550/16 C