Funai LCD A2004 User Manual
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6-2 L4100EA
2. +B Adjustment
Purpose: To obtain correct operation.
Symptom of Misadjustment: The picture is dark and
the unit does not operate correctly.
Note: TP401(+B), TP300(GND), VR649 --- Main CBA
1. Connect DC Volt Meter to TP401 and
TP300(GND).
2. Adjust VR649 so that the voltage of TP401
becomes +13.0±0.3V DC [LCD-A1504] or
+21.0±0.3V DC [LCD-A2004].
3. Flicker Adjustment
Adjustment Point: R977 (LCD Main CBA)
1. Enter the Service mode.
2. Press “2” button on the remote control unit.
The...](http://img.usermanuals.tech/thumb/2037/38655/w64_Funai_LCD-A2004-6.png "Page 7
6-2 L4100EA
2. +B Adjustment
Purpose: To obtain correct operation.
Symptom of Misadjustment: The picture is dark and
the unit does not operate correctly.
Note: TP401(+B), TP300(GND), VR649 --- Main CBA
1. Connect DC Volt Meter to TP401 and
TP300(GND).
2. Adjust VR649 so that the voltage of TP401
becomes +13.0±0.3V DC [LCD-A1504] or
+21.0±0.3V DC [LCD-A2004].
3. Flicker Adjustment
Adjustment Point: R977 (LCD Main CBA)
1. Enter the Service mode.
2. Press “2” button on the remote control unit.
The...")
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 /STANDBY CONTROL 61 (R-CH) (L-CH) 2 5RF JK801 HEADPHONE JACK CN801SP-R 1GND 2 SP802 SPEAKER L-CH CN802SP-L 1GND 2 TO IF/VIDEO BLOCK DIAGRAM 13 2 WF1 CLN802 CLN801 SP801 SPEAKER R-CH TO SYSTEM CONTROL BLOCK DIAGRAM NICAM-RESET 4322 AUDIORESET 6INH JK75113 AUDIO2(L) -OUT AUDIO2(R) -OUT 6 AUDIO2(L) -IN 2 AUDIO2(R) -IN Q732 Q733 Q741 Q742 AL+5V INSEL-MUTES/C-JACK-MUTESP-MUTE DEEMPHASIS SOUND SELECT A/D CONVERTER SCART DSP INPUT SELECT SCART PRESCALE D/A CONVERTER VOLUME SCART1 OUTPUT SELECT SCART1 CHANNEL MATRIX QUASI-PEAK CHANNEL MATRIX I2C READ REGISTER 3031 QUASI-PEAK DETECTORLOUD SPEAKER CHANNEL MATRIXAV C D/A CONVERTER STANDERD AND SOUND DETECTION
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 143142141140139135134133132131130129128127123122121120119116115114113106 TP316TP317TP312TP313TP314TP315 CN321A OR(3) 32OR(4) 31OR(5) 30OR(0) 35OR(1) 34OR(2) 33OG(3) 25OG(4) 24OG(5) 23OR(0) 28OG(1) 27OG(2) 26OB(3) 18OB(4) 17OB(5) 16OB(0) 21OB(1) 20OB(2) 19ER(3) 5ER(4) 4ER(5) 3ER(0) 8ER(1) 7ER(2) 6EG(3) 47EG(4) 46EG(5) 45EG(0) 50EG(1) 49EG(2) 48EB(3) 40EB(4) 39EB(5) 38EB(0) 43EB(1) 42EB(2) 41 CVBS1 8CVBS2 9S-VIDEO-C 5S-VIDEO-Y 6VIDEO-Pb 3VIDEO-Pr 1VIDEO-Y 2VCOM 3VCOM 4 CN321A 84 85 X301 54MHzXIN XOUT CLEAR 15CLKV 14 VCOM CONTROLQ971 IC981,CLEAR 91959698 STV1 13LP 44 CN320A POL 43HMS1-E 10CLKH 12STH1 42HMS1-O 14 WF11 WF10 WF12 WF9 VIDEO SIGNAL PROCESSNTSC/PAL SEPARATIONBURST LOCKED OUTPUT CONTROLCHROMA DECODER SECAM PDM RCO PA N E L SIGNAL PROCESS TV SIGNAL PROCESS INPUT CONTROL CVBS Y C B GR A/DA/DA/DA/D 33441342402131 LP 97187 WF14 WF13 Comparison Chart of Models & Marks Model MarkLCD-A1504 LCD-A2004A B B G R B G R R905 R907R901 R904 R902 R997
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) 35ER(5) 34EG(0) 32EG(1) 31EG(2) 30EG(3) 29EG(4) 28EG(5) 27EB(0) 25EB(1) 24EB(2) 23EB(3) 22EB(4) 21EB(5) 20 169168167166165161160159158155154153152151150146145 LCD MODULE TP322TP323TP318TP319TP320TP321 143142141140139135134133132131130129128127123122121120119116115114113106 TP316TP317TP312TP313TP314TP315 CVBS1 8CVBS2 9S-VIDEO-C 5S-VIDEO-Y 6VIDEO-Pb 3VIDEO-Pr 1VIDEO-Y 2VCOM 17VCOM 18 979596 STV1 CLKV 103 CN311A CN313A STV1 14CLKV 16VCOM 1VCOM 2 98 EVENINV 2ODDINV 8CLKH 5 CN310A STH1 37POL 38LP 39 WF14 WF13 WF11 WF10 WF12 WF9 PANEL+10.8V R977 VCOM VCOM CONTROL Q971 IC981, VIDEO SIGNAL PROCESSNTSC/PAL SEPARATIONBURST LOCKED OUTPUT CONTROLCHROMA DECODER SECAM PDM RCO PANEL SIGNAL PROCESS TV SIGNAL PROCESS INPUT CONTROL CVBS Y C B GR A/DA/DA/DA/D 84 85 X301 54MHzXIN XOUT 3344134240213191 Comparison Chart of Models & Marks Model MarkLCD-A1504 LCD-A2004A B B G R B G R R905 R907 R901 R904 R902 R994
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 it may cause some components in the power supply circuit to fail. LINE FILTER L601 AC601 AC CORD BRIDGE RECTIFIER D605 HOT COLD T601 11912141516 7 43 12 MAIN CBA CN101A Q505Q504Q503 HOT CIRCUIT. BE CAREFUL. 532 Q511 Q502Q501 REG+5VAL+3.3V AL+8V PROTECT-1 +12VAL+33VP-ON-H Q506 Q633 PROTECT-2 IC631+5V REG 1013 IC504+3.3V REG IC601 ERROR VOLTAGE DET Q507Q512 VR649 TP401 +B Q510 412756 PROTECT-3 CN103A AL+5VP-ON-H2AL+13V Q508 CN101B PANEL+25V77PANEL+3.3V44PANEL+10.8V11 PANEL+25V PANEL+3.3V LCD MAIN CBA UNIT PANEL-6V10 10 PANEL-6VPANEL+10.8V CN103B AL+8V 14 14AL+5V 13 13AL+3.3V 11 11 REG+3.3V AL+5V AL+8V 15 15 REG+1.8V AL+3.3VIC101+3.3V REG IC102+1.8V REG Q511 SWITCHING REGULATOR IC602 +B ADJ P-25V-ON AL+21V TO LCD BACKLIGHT BLOCK DIAGRAM (A)TO LCD BACKLIGHT BLOCK DIAGRAM (B) 43 12 +8V REG IC503 IC603 ERROR VOLTAGE DET IC507+5V REG INVERTER CBA AL+21V 33AL+21V 22AL+21V 11AL+21V 44 CN405 CN1401 P-ON-L B Comparison Chart of Models & Marks Model MarkLCD-A1504 LCD-A2004A B B B B A A F601 T4A L 250V Q603 Q602 D505SHUNT REGULATOR( ( D525SHUNT REGULATOR( ( D649SHUNT REGULATOR( (
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 CONTROL BLOCK DIAGRAM Comparison Chart of Models & Marks Model MarkLCD-A1504 LCD-A2004A B
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 PROTECTORQ1414,1415 12 T1403 CN1404 OVER VOLTAGE PROTECTORQ1416,1417OVER VOLTAGE PROTECTORQ1418,1419 T1404 CN1405 OVER VOLTAGE PROTECTORQ1420,1421 12 10 97 316425 10897 316425 10897 316425 10897 316425 108 TO POWER SUPPLY BLOCK DIAGRAMAL+21V P-ON-H 12 IC1402 (AMP) IC1403 (AMP)1 7 2 65 3+- +-+- +- +- +- 8 1314 910 12 1 7 2 63 5 TO SYSTEM CONTROL BLOCK DIAGRAM Comparison Chart of Models & Marks Model MarkLCD-A1504 LCD-A2004A B
L4100SCM1 8-3 Main 1/4 & IR Sensor Schematic DiagramComparison Chart of Models and Marks MODE L MARK LCD-A1504 A LCD-A2004 B
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, replace only with the same type fuse.NOTE: The voltage for parts in hot circuit is measured using hot GND as a common terminal.