Funai LCD A2004 User Manual

7-3
Audio Block Diagram
L4100BLA
MAIN CBA
AUDIO SIGNAL
VOLUMETO SYSTEM 
CONTROL 
BLOCK
INPUT-0(INV)
INPUT-1(INV) SCL SDA
IC871(INPUT SELECT)
SW CTL
3
11151241
910
dBX/MNR
PANDA1
FM/AM
PRESCALE
I2C  READ
REGISTER
AUTOMATIC
SOUND
SELECT
NICAM
PRESCALE
L-CH R-CH
VOLUME
AGC
DEMODULATOR
A/D
CONVERTERI2C
DECORDER
TO IF/VIDEO 
BLOCK
DIAGRAM 
TUNER
AUDIO1
AUDIO2
TUNER
AUDIO1
AUDIO2(L-CH)
(R-CH)
21213IC831(SOUND PROCESSOR)
AUDIO1(L)
-IN JK723
SIF
JK724AUDIO1(R)
-IN
14
IC801(AUDIO AMP)
7
VOLUME
11
 AMP
 AMP MUTE...

7-4
L4100BLLCD
LCD Block Diagram ( A )
LCD MAIN CBA UNIT
VIDEO SIGNAL
IC301(LCD DRIVE / SIGNAL PROCESS)
TO
IF/VIDEO
BLOCK
DIAGRAM
CN103A
CN103B
182181180179175174173
ODDINV
EVENINV STH1 POL
STV1
CLKVCLKH1 LCD MODULE
VREF(4) 25VREF(0) 29VREF(1) 28VREF(2) 27VREF(3) 26VREF(7) 21VREF(5) 23VREF(6) 22VREF(8) 20VREF(9) 19
104105103
VCOM 35VCOM
36
PANEL+10.8V
R977
VCOM
CN320A
169168167166165161160159158155154153152151150146145
LCD MODULE
TP322TP323TP318TP319TP320TP321...

7-5
LCD Block Diagram ( B )
L4200BLLCD
CN310A
LCD MAIN CBA UNIT
VIDEO SIGNAL
IC301(LCD DRIVE / SIGNAL PROCESS)
TO
IF/VIDEO
BLOCK
DIAGRAM
CN103A
CN103B
182181180179175174173
CN311A
ODDINV
EVENINV STH1 POL LP
CLKH1 LCD MODULE
VREF(4) 10VREF(0) 14VREF(1) 13VREF(2) 12VREF(3) 11VREF(7) 6VREF(5) 8VREF(6) 7VREF(8) 5VREF(9) 4
104105
OR(0) 29OR(1) 28OR(2) 27OR(3) 26OR(4) 25OR(5) 24OG(0) 22OG(1) 21OG(2) 20OG(3) 19OG(4) 18OG(5) 17OB(0) 15OB(1) 14OB(2) 13OB(3) 12OB(4) 11OB(5) 10ER(0) 39ER(1) 38ER(2) 37ER(3) 36ER(4)...

7-6L4100BLP
Power Supply Block Diagram
CAUTION !
FOR CONTINUED PROTECTION AGAINST FIRE HAZARD,
REPLACE ONLY WITH THE SAME TYPE T 4A , 250 V FUSE. NOTE : 
The voltage for parts in hot circuit is measured using
hot GND as a common terminal.CAUTION !
Fixed voltage (or Auto voltage selectable ) power supply circuit is used in this unit.
If Main Fuse (F601) is blown, check to see that all components in the power supply
circuit are not defective before you connect the AC plug to the AC power supply.
Otherwise...

7-7L4100BLLB
LCD Backlight Block Diagram ( A )
T40134
BACK
LIGHT
CN401
21
2516
10978
OVER VOLTAGE
PROTECTORQ423,Q427OVER VOLTAGE
PROTECTORQ424,Q428
T402342516
10978
BACK
LIGHT
CN402
21
SWITCHING Q425,Q426SWITCHING Q421,Q422
OVER CURRENT
PROTECTOR Q462
PWM
CONTOROL Q468
BACKLIGHT-ADJ
OVER VOLTAGE
PROTECTOR Q464
+
Q461 Q460
+12V
SWITCHING Q466
BACKLIGHT-SW
SWITCHING
BACKLIGHT-ON Q469
PROTECT-1
LCD MODULE MAIN CBA
AL+13V
Q463
TO
POWER 
SUPPLY
BLOCK
DIAGRAM
SWITCHING
BACKLIGHT-ON Q467
Q471
Q470
TO
SYSTEM...

7-8
LCD Backlight Block Diagram ( B )
L4200BLLB
SW/
SW CTL BACKLIGHT-SWRL1401
Q1405,
Q1406
IC1401 (DC-AC INVERTER CONTROL) Q1403
Q1402VCC
12
T1401
CN1402
LCD MODULE INVERTER CBA
BACKLIGHT-ADJPROTECT-1
SW/
SW CTL Q1407,
Q1408
Q1401
BACK
LIGHTBACK
LIGHTBACK
LIGHTBACK
LIGHT
2627232428141191312
11516
+10V
REG. OUTPUT
LOGIC1
OUTPUT
LOGIC2
LOGICOVER
VOLTAGE
PROTECT
SLOW
START
OSC
PWM2PWM1
STANDBY
PROTECT
MODE SW
457
OVER VOLTAGE
PROTECTORQ1410,1411OVER VOLTAGE
PROTECTORQ1412,1413
T1402
CN1403
OVER VOLTAGE...

L4100SCM1 8-3
Main 1/4 & IR Sensor Schematic DiagramComparison Chart of 
Models and Marks
MODE L MARK
LCD-A1504 A
LCD-A2004 B
 

L4100SCM2
Main 2/4 Schematic Diagram
8-4
 

L4100SCM3
Main 3/4 Schematic Diagram
8-5
Comparison Chart of 
Models and Marks
MODE L MARK
LCD-A1504 A
LCD-A2004 B
 

L4100SCM4
Main 4/4 Schematic Diagram
8-6
Comparison Chart of 
Models and Marks
MODE L MARK
LCD-A1504 A
LCD-A2004 B
CAUTION !
Fixed voltage (or Auto voltage selectable) power supply circuit is used in this unit.
If Main Fuse (F601) is blown , check to see that all components in the power supply
circuit are not defective before you connect the AC plug to the AC power supply.
Otherwise it may cause some components in the power supply circuit to fail.CAUTION !
For continued protection against fire hazard,...