Philips VR540/39 - Main Schematic Diagrams; Main 1;8 Schematic Diagram

Main 1/8 Schematic Diagram
1-10-32
1-10-33
HE473SCM1
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
IC501 KEY VOLTAGE CHART
KEY 1 (7 PIN) KEY 2 (8 PIN) KEY 2 (8 PIN)
(D,E) (F,G,H,I,J,K,L)
0.00 ~ 0.51V POWER STOP/EJECT STOP/EJECT
0.51 ~ 0.92V CH DOWN REW REW
0.92 ~ 1.27V CH UP PLAY PLAY
1.27 ~ 1.61V ------------------- FF FF
1.61 ~ 1.98V ------------------- ------------------- -------------------
1.98 ~ 2.39V REC/OTR ------------------- PAUSE
2.39 ~ 2.90V ------------------- ------------------- -------------------
2.90 ~ 3.60V S-INH ------------------- -------------------
3.60 ~ 4.30V ------------------- ------------------- -------------------
4.30 ~ 5.00V KEY OFF KEY OFF KEY OFF
Comparison Chart of
Models and Marks
MODEL MARK
VR540/39 D
VR540/58 E
VR740/02 F
VR740/07 G
VR740/16 H
VR740/39 I
VR740/58 J
VR742/16 K
VR742/39 L
VR742/58 M