Pioneer DV-515 Service Manual page 5

1.2.3 Tracking / Slider Servo
ATB: For phase differential TE (use for DVD),
the tracking balance compensation is
achieved by outputting the offset from
the TBAL output at pin 44 of the digital
servo IC, and by biasing the charge pump
resistor for phase-difference error of
RFIC.
For 3-beam TE (use for CD), the tracking
balance compensation is achieved by
adjusting the gain balance of A and C in
RFIC with the voltage of RFIC-pin 30.
The difference is detected by processing
TE at pin 32 of IC 201 with an internal
digital equalizer.
TDO: In addition to the servo output, the low-
band components, such as the kick-brake
for jump, are added for TDO output.
SLDO: The low-band components of TE are
processed by the internal digital
equalizer, and deadband is added for
SLDO output. The offset voltage for
pickup movement is also included in the
SLDO output.
1.2.4 SPINDLE SERVO
For a CD, the RF signal output from pin 46 of the RF IC is converted
to binary in IC201. By comparing the binary value with the reference
CLK (clock), the SPDL ERR signal is output from pin 46.
• SPDL SERVO
OEIC
SPDL +
12
IC251
SPDL
DRV
M
BA6195FP
13
SPDL -
(Base)
• TRACKING / SLIDER SERVO
PICKUP
OEIC
C A
TRKG
COIL
IC101 RFO
RF
3
54
RFIC
LA9701M
CLK
(27M)
46
RF
39
IC201
DIGITAL
FG
SERVO
29
55
LC78651W
46
25
SPDO
TE RF
TE
5
35
B1
6
IC101
B2
RFIC
7
TBAL
B3
LA9701M
8
39
B4
9
CP
13 14 30
11
6
12
IC151
DRIVER
26
15
16
M
SLDR
For a DVD, the SPDL ERR signal is generated from the PWM signal
output from LSI-ΙΙ. Upon receiving this signal via pin 29, IC201
also outputs it from pin 46, switching from the CD SPDL ERR
signal.
ATC
IC301
3
A/D
|
8 bit
ADC1175CIJMX
10
12
APC
AFC
IC302
ASC
(1/2)
VCO
FPWM
VPWM
PPWM
RPWM
IC261
(2/2)
V165
IC261
(1/2)
32
ADDRESS
IC201
&
DIGITAL
BUS
44
SERVO IC
LC78651W
48 45
TDO
SLDO
179
200
|
207
IC701
LSI II
176
PD4833A
178
180
177
161 163 166 168
95
DUTY50
DV-515
IC501
MECH.
CONTROL
PE5012A
159
FG
5