Pioneer AVIC-Z2/XU/UC Service Manual page 293

1
1.1.3 Tracking error (TE) generating circuit
A
• CD (three-beam TE)
CN1101
17
A
63
VIN12
10
C 62
VIN11
B
AN8703FH
· DVD (phase difference TE)
16
B1
57
EQ
VIN1
15
B2 58
EQ
VIN2
C
13
B3
59
EQ
VIN3
11
B4
60
EQ
VIN4
AN8703FH
D
Tracking error (TE) generating circuit
For DVDs, the TE signal is generated by utilizing the phase difference between the (B2 + B4) and (B1 + B3) signals (the
phase difference method).
For CDs, the A and C signals are applied to the TE generating circuit via the external resistors. Inside the circuit the
signals are fed to the variable amplifier for the tracking balance adjustment, and finally the TE signal is obtained by
amplifying the (A – C) signal (the three-beam method).
E
F
4
1
2
TBAL
6
Differential
TBAL Phase Det.
6
2
3
TEOUT
+
18
-
TEY
17
TEN
+ TEOUT
18
- VHALF
17
TEN
TEY TEX TE
MNZS26EDCUB
C X - 3 01 6
3
4
TEX TE
118 ADI
MNZS26EDCUB
VHALF
118 ADI
4