5
CX-683
4) TE and SE Amplifiers
Side spot E and F signals are I-V converted, then entered to the EF balance adjusting amplifier. Then, after polarity of
the tracking error signal is switched by the TE differential amplifier (TESW), the signal is conducted to the gain
amplifier to generate TE signal.
Select PTGR = 1 for the Pit play and PTGR = 2 for the group play.
The EF balance adjusting amplifier automatically adjusts an EF balance resistance value so that level of SE signal
becomes the same as the reference voltage Vc when the TRKG made is open.
The SE amplifier generates TE signal from the LPF, then enters it into the signal processing LSI (IC201: 73 pins) for
digital equalizing.
Condition
PTGR
HLPT
PremasterdDisc
Pit
High reflection
1
2
RecordableDisc
Pit
Low reflection
1
1
Groove
Low reflection
2
1
–1
+1
+2
–2
8
+
–
9
+
–
26
27
–2
–1
74
28
–2
–1
73
IVR0-IVR4
EFB0-EFB4
EIV
E
EE
EE
FF
IVR0-IVR4
FIV
F
FF
CSLED
TG
TEA
TESW
PTGR
TE
<To IC201 pins>
R221
SEA
SE
<To IC201 pins>
R220
100
100
C110
R068
Pit / GR Select
Pit
GR
