Philips VR140/02, Service Manual

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Main 1/8 Schematic Diagram
1-10-32
1-10-33
HE270SCM1
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
Comparison Chart of
Models and Marks
MODEL MARK
VR140/02 N
VR140/07 O
VR140/39 P
VR140/58 Q
VR840/07 R
VR840/16 S
VR840/39 T
VR840/58 U
IC501 KEY VOLTAGE CHART
KEY 1 (7 PIN) KEY 2 (8 PIN) KEY 2 (8 PIN)
(N,O,P,Q) (R,S,T,U)
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 ------------------- ------------------- PAUSE
1.98 ~ 2.39V REC/OTR ------------------- -------------------
2.39 ~ 2.90V ------------------- ------------------- -------------------
2.90 ~ 3.60V S-INH ------------------- -------------------
3.60 ~ 4.30V ------------------- ------------------- -------------------
4.30 ~ 5.00V KEY OFF KEY OFF KEY OFF