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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.
PremasterdDisc
RecordableDisc
E
+
8
–
IVR0-IVR4
F
+
9
–
IVR0-IVR4
Condition
Pit
High reflection
Pit
Low reflection
Groove
Low reflection
EIV
EE
EFB0-EFB4
FIV
EE
FF
FF
PTGR
HLPT
1
2
1
1
2
1
C110
R068
CSLED
27
–1
–2
Pit / GR Select
PTGR
–1
Pit
+1
–1
+2
GR
–2
–2
TESW
TG
R220
SE
<To IC201
28
100
SEA
R221
TE
<To IC201
26
100
TEA
CX-683
pins>
73
pins>
74
5
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