Pioneer MJ-D508 Service Manual page 65

IR3R55M (IC101: CORE MAIN UNIT ASSY)
RF Signal Processor
Block Diagram
48 47 46 45 44
EFM
RF1
1
AGC
RF2
2
DIFF
RF3
3
DIFF
RF4
4
REFI
5
REFO
6
BIAS
RFADD
7
TCGI
8
AIN 9
BIN 10
EIN 11
FIN 12
13 14 15 16 17
Pin Function
No. Name
1 RF1 Inputs RF signal input terminal 1
pickup RF signal output.
2 RF2 Inputs RF signal input terminal 2
pickup RF signal output.
3 RF3 Inputs RF signal input terminal 3
pickup RF signal output.
4 RF4 Inputs RF signal input terminal 4
pickup RF signal output.
5 REFI Standard voltage amp input terminal
6 REFO Standard voltage amp output terminal
7 RFADD RF1 – 4 resistance addition output terminal
8 TCGI Track cross detection signal amp input terminal
during groove input
9 AIN Servo-use signal amp (Focus servo system)
inversion input terminal
10 BIN Servo-use signal amp (Focus servo system)
inversion input terminal
11 EIN Servo-use signal amp (Tracking servo system)
inversion input terminal
12 FIN Servo-use signal amp (Tracking servo system)
inversion input terminal
13 BIAS Bias input terminal
14 AVCC Analog power terminal
∗
15 VSTBY Logic signal output terminal (outputs STBY signal
inversion signal)
43 42 41 40 39 38 37
36
35
34
33
ADIP
AGC
32
31
30
LPF HPF
29
28
27
26
LOGIC
25
18 19 20 21 22 23 24
Description
No. Name
∗
16 XDISC Logic signal output terminal (outputs DISC signal
inversion signal)
∗
17 XSGAIN Logic signal output terminal (outputs SGAIN signal
inversion signal)
18 AGND Analog part GND terminal
ADIPI
19 DGND Digital part GND terminal
ADIPO
20 DTEMP Tip temperature detection terminal
NC
ADLPFO 21 LATCH Latch signal input terminal
22KO
22 CLOCK Clock signal input terminal
22KI
23 DATA Serial data input terminal
WBO
24 DVCC Digital part power terminal
TCGO
25 FOUT Servo-use signal amp (Tracking servo system) output
terminal
AOUT
26 EOUT Servo-use signal amp (Tracking servo system) output
BOUT
terminal
EOUT
27 BOUT Servo-use signal amp (Focus servo system) output
FOUT
terminal
28 AOUT Servo-use signal amp (Focus servo system) output
terminal
29 TCGO Track cross detection signal amp output terminal during
groove output
30 WBO Comparator output terminal for ADIP signal 2-value
conversion
31 22KI Comparator input terminal for ADIP signal 2-value
conversion
32 22KO ADIP signal HPF amp output terminal
33 ADLPFO ADIP signal LPF amp output terminal
∗
34 NC NC
35 ADIPO ADIP signal preamp output terminal
36 ADIPI ADIP signal AGC amp output terminal
37 ADAGC Smoothing capacitor connection terminal for ADIP
signal AGC
38 ADAGI ADIP signal AGC amp input terminal
39 RF2–1 RF1, RF2 differential signal
40 EFMO RF signal preamp output terminal
∗
41 EFMI RF signal AGC amp output terminal
42 AVCC Analog part power terminal
43 AGND Analog part GND terminal
44 EFMAGC Smoothing capacitor connection terminal for EFM signal
AGC
45 EFMAGI EFM signal AGC amp input terminal
∗
46 ATTR Terminal for attenuating 47, 48 pin output signal
47 GOUT Outputs RF1 + RF2 + RF3 – RF3 – RF4 signal during
groove output
48 POUT RF1 – 4 resistance addition output during pit output
Terminals denoted with an asterisk (∗) are (Open) terminals that are
not externally connected.
MJ-D508
Description
65