Block Diagram - LG CRD-8402B Service Manual

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IC INTERNAL BLOCK DIAGRAM AND PIN DESCRIPTION
• IC102 (CXA2581N) : RF Amplifier IC
I-V converts and amplifies the signal received from the pick-up and then applies to DSP part of one-
chip IC (IC501).

Block Diagram

Vcc
GND
AVC
DVC
Pin Description
Pin No. Symbol I/O
1
LD
O
APC Amp Output
2
PD
I
APC Amp Input
3
EQ – IN
I
RFAC VCA Block, EQ Block Input
4
AC – SUM O
RFAC RF SUM Output
5
GND
I
GND
6
A
I
RF Input (A Signal)
7
B
I
RF Input (B Signal)
8
C
I
RF Input (C Signal)
9
D
I
RF Input (D Signal)
10
E
I
RF Input (E Signal)
11
F
I
RF Input (F Signal)
12
SW
I
Mode Switching Signal Input
13
DVcc
I
DVcc
14
DVC
O
DVC Output
15
RFAC
O
RFAC Summing Equalized Output
12
Description
Pin No. Symbol I/O
16
FE
O
Focus Error Amp Non-inverted Output
17
FEI
Focus Error Amp Inverted
18
TE
O
Tracking Error Signal Output
19
TE_BAL
I
TE Control
20
CE
O
Center Error Signal Output
21
CEI
CE Amp Inverted
22
Vcc
I
Vcc
23
RFG
I
RFAC Low Frequency Gain Control
24
BST
I
EQ Boost Volume Control
25
VFC
I
EQ Cut OFF Frequency Control
26
RFC
I
EQ Cut OFF Frequency Control
27
VC
O
VC Output
28
RFDCO
O
RFDC Output
29
RFDCI
RFDC Amp Inverted
30
DC_OFST –
RFDC Signal Output Control
AC_SUM
EQ_IN
RFG
BST
RFC
VFC
Description

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Crd-8480c