Service Manuals, User Guides, Schematic Diagrams or docs for : LG Audio FFH-8970AX FFH-8970AX IC
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INTERNAL BLOCK DIAGRAM OF ICs
FAN8039BD3
5-CH Motor Diver
Description
The FAN8039BD3 is a monolithic integrated circuit suitable for a 5-CH motor driver which drives the
tracking actuator, focus actuator, sled motor, tray motor, spindle motor of the DVDP/CAR-CD systems.
DO 3 +
GND2
DO 5+
GND3
DO 5-
VCC1
DO 4+
DO 3-
VREF
DO4-
VCC
FIN
IN3
PS
IN4
(GND)
28 27 26 25 24 23 22 21 20 19 18 17 16 15
2 2 10K 2 2
PS RESX FUNCTION
Level H H All Active Level Level
Shift Shift Shift
10K H L Reg. Only Deactive 10K
L H Reg. Only Active
L L All Deactive
Regulator
2.5V
10K
10K
Level TSD COMP Level
Shift Shift
2 2 10K 2 2
1 2 3 4 5 6 7 8 9 10 11 12 13 14
DO 2+
FWD
DO1+
RESX
DO 2-
GND1
REO
REB
REV
REGVCC
DO1-
IN1
CTL
IN2
FIN
(GND)
Pin Definitions
NO Symbol Description NO Symbol Description
1 DO1- CH1 Drive Output (-) 15 GND2 Power Ground1 (CH 2,3,5)
2 DO1+ CH1 Drive Output (+) 16 DO5+ CH5 Drive Output (+)
3 IN1 CH1 Drive Input 17 DO5- CH5 Drive Output(-)
4 REGVCC Regulator Supply Voltage 18 DO3- CH3 Drive Output(-)
5 REB Regulator Output 19 DO3+ CH3 Drive Output (+)
6 REO Regulator Feedback Input 20 IN3 CH3 Drive Input
7 RESX Regulator Reset 21 VCC1 Supply Voltage1(CH2,CH3,CH5)
8 GND1 Signal Ground 22 PS Power Save
9 CTL CH5 Motor Speed Control 23 VREF Bias Voltage
10 FWD CH5 Forward Input 24 VCC Supply Voltage(CH1,CH4)
11 REV CH5 Reverse Input 25 IN4 CH4 Drive Input
12 IN2 CH2 Drive Input 26 DO4+ CH4 Drive Output (+)
13 DO2+ CH2 Drive Output (+) 27 DO4- CH4 Drive Output (-)
14 DO2- CH2 Drive Output (-) 28 GND3 Power Ground2 (CH 1,4)
- 2-41 -
KA78R33
Low Dropout Voltage Regulator
Description
The KA78R33 is a low-dropout voltage regulator suitable for various electronic equipments. It provides
constant voltage power source with TO-220 4 lead full mold package. Dropout voltage of KA78R33 is
below 0.5V in full rated current(1A). This regulator has various function such as peak current protection,
thermal shut down, overvoltage protection and output disable function.
Internal Block Diagram
Q1
Vin 1 2 Vo
OVERVOLTAGE
THERMAL SHUTDOWN PROTECTION
BANDGAP REFERENCE -
+
R1
SOA PROTECTION
HIGH / LOW OUTPUT
4 ON / OFF
Vdis -
+
R2
- CIRCUIT
SHORTCIRCUIT
1.4V
PROTECTION
3
GND
LC72131
AM/FM PLL Frequency Synthesizer
- 2-42 -
Block Diagram
XIN REFERENCE PHASE DETECTOR PD
DIVIDER CHARGE PUMP
XOUT
AIN
1 SWALLOW COUNTER UNLOCK
FMIN AOUT
2 1/16. 1/17 4bits DETECTOR
AMIN 12bits PROGRAMMABLE
DIVIDER
CE
DI CCB DATA SHIFT REGISTER UNIVERSAL IFIN
I/F LATCH COUNTER
CL
D0
POWER
VDD ON
RESET
VSS
B01 B02 B03 B04 I01 I02
LA1837
Single-Chip Home stereo IC with Electronic Tuning Support
The LA1837 is a single-chip AM/FM IF and MPX IC that supports electronic tuning and was developed for
use in home stereo systems. It is optimal for use in automatic station selection systems that use the SD and
IF counting techniques.
Block Diagram
FM SD
ADJ
3 rd 5 th
DECODER
ANTI-BIRDIE
FM
- 2-43 -
KIA 78R12 PI
4 TERMINAL LOW DROP VOLTAGE REGULATOR
The KIA78RXX Series are Low Drop Voltage Regulator suitable for various electronic equipments. It
provides constant voltage power source with TO-220 4 termainal lead full molded PKG. The Regulator has
multi function such as over current protection, overheat protection and ON/OFF control.
- 2-44 -
Block Diagram
KIA7805AP/API
THREE TERMINAL POSITIVE VOLTAGE REGULATORS 5V, 6V, 8V, 9V, 10V, 12, 15V, 18V, 24V.
EQUIVALENT CIRCUIT
- 2-45 -
BA3126N
2-channel head switch for radio cassette recorders
- 2-46 -
BU2090F
12-bit, Serial IN, Parallel OUT driver
Block diagram
Vss 1 Control circuit 16 VDD
DATA 2 15 Q11
12-bit shift register
CLOCK 3 14 Q10
Latch
Q0 4 13 Q9
Output buffer
(open drain)
Q1 5 12 Q8
Q2 6 11 Q7
Q3 7 10 Q6
Q4 8 9 Q5
PIN DESCRIPTION
Pin No.
Pin name Function
BU2090/F/FS BU2092/F BU2092/FV
1 1 1 Vss GND
2 2 2 DATA Serial data input
3 3 3 CLOCK Data shift clock input
- 4 4 LCK Data latch clock input
4 5 5 Q0 parallel data output
5 6 6 Q1 parallel data output
6 7 7 Q2 parallel data output
7 8 8 Q3 parallel data output
8 9 9 Q4 parallel data output
9 10 10 Q5 parallel data output
10 11 11 Q6 parallel data output
- - 12 N.C. Not connected
- - 13 N.C. Not connected
11 12 14 Q7 parallel data output
12 13 15 Q8 parallel data output
13 14 16 Q9 parallel data output
14 15 17 Q10 parallel data output
15 16 18 Q11 parallel data output
- 17 19 OE Output Enable
16 18 20 VDD Power supply
- 2-47 -
REPAIRS REGARDING CD MECHANISM
IMPROVED METHOD - WHEN THE TRAY GEARS WERE DISTORTED
1. How to open the tray.
In case of not suppling power push two hooks (H) of the base, and them open the tray.
2. How to improve the distorted gears.
(1) Do the hole "C" of the cam gear to face forward the pick-up so the pick-up is down like figure.
(2) Do the hole "B" of main gear to face forward pick-up, too.
(3) Set the last part of main gear to point "A".
(4) Push the tray to end.
- 2-48 -
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