Emerson 6420FE - Manuals

2-3 L6115IMP Precautions during Servicing A. Parts identified by the ( # ) symbol are critical for safety.Replace only with part number specified. B. In addition to safety, other parts and assembliesare specified for conformance with regulations ap-plying to spurious radiation. These must also berep...

2-4 L6115IMP Safety Check after Servicing Examine the area surrounding the repaired locationfor damage or deterioration. Observe that screws,parts and wires have been returned to original posi-tions. Afterwards, perform the following tests and con-firm the specified values in order to verify complia...

3-1 L14STA STANDARD NOTES FOR SERVICING Circuit Board Indications a. The output pin of the 3 pin Regulator ICs is indicat- ed as shown. b. For other ICs, pin 1 and every fifth pin are indicat- ed as shown. c. The 1st pin of every male connector is indicated as shown. Pb (Lead) Free Solder Pb free ma...

3-4 L14STA Instructions for Handling Semiconductors Electrostatic breakdown of the semiconductors mayoccur due to a potential difference caused by electro-static charge during unpacking or repair work. 1. Ground for Human Body Be sure to wear a grounding band (1M Ω ) that is prop- erly grounded to r...

4-1 L2401DC CABINET DISASSEMBLY INSTRUCTIONS 1. Disassembly Flowchart This flowchart indicates the disassembly steps for thecabinet parts, and the CBA in order to gain access toitem(s) to be serviced. When reassembling, follow thesteps in reverse order. Bend, route and dress thecables as they were. ...

4-3 L2401DC TV Cable Wiring Diagram ANODE Fig. 5 FLYBACK TRANSFORMER T571 AC601AC CORD CN801 CLN801 SP801 CLN802 SP802 CN802 CN691 MAIN CBA DG691 DEGAUSSING COIL TU11TUNER WH301A WH501A CN571 JK1501 WH501B WH301B TO CRT GROUND CN1501 FOCUS SCREEN

5-1 L2401EA ELECTRICAL ADJUSTMENT INSTRUCTIONS General Note: "CBA" is abbreviation for "Circuit Board Assem-bly." NOTE: Electrical adjustments are required after replacingcircuit components and certain mechanical parts.It is important to perform these adjustments onlyafter all repair...

5-5 L2401EA 12. Cut-off Adjustment Purpose: To adjust the beam current of R, G, B, and screen voltage. Symptom of Misadjustment: White color may be reddish, greenish or bluish. Note: Screen Control FBT --- Main CBAF.B.T= Fly Back TransformerUse service remote control unit 1. Degauss the CRT and allo...

5-6 L2401EA 14. Sub-Brightness Adjustment Purpose: To get proper brightness. Symptom of Misadjustment: If Sub-Brightness is incorrect, proper brightness cannot be obtained byadjusting the Brightness Control. Note: IQW Setup level --- 7.5 IREUse service remote control unit 1. Enter the Service mode. ...

5-7 L2401EA 17. Convergence Adjustment Purpose: To obtain proper convergence of red, green and blue beams. Symptom of Misadjustment: If Convergence Adjust- ment is incorrect, the edge of white letters may havecolor edges. 1. Loosen the Ring Lock and align red with blue dots or Crosshatch at the cent...

6-1 BLOCK DIAGRAMS System Control Block Diagram L2401BLS 58 73 75 63 62 80 56 SCL AFT -IN AG C AFT -IN AG C INPUT0 INPUT1 PR O TECT -2 PR O TECT -1 PR O TECT -3 P-ON-H SD A REMO TE SENSOR KEY SWITCH 74 28 18 40 DG-ON-H +5V -CTRL +5V -CTRL2 +8V -CTRL DG-ON-H +5V -CTRL +5V -CTRL2 +8V -CTRL TO PO WER S...

6-2 L2401BLIF IF/Video Block Diagram 58 16 56 32 30 SCL CF31 CF32 VCO F/B Q31 AG C SD A CPN. CPS . CPS . CPN. TUNER LINE S-SW TO CR T/H.V . BLOCK WH301A TO CR T/H.V . BLOCK WH301B BLUE5 GREEN4 RED3 IC31 (IF SIGNAL PR OCESS) CHR OMINANCE PR OCESS CIRCUIT LUMINANCE PR OCESS CIRCUIT CHR OMA COMB BASEBA...

6-3 Audio Block Diagram L2401BLA MAIN CB A A UDIO SIGNAL A-MUTE V OLUME TO SYSTEM CONTR OL BLOCK INPUT 0 INPUT 1 SCL SD A IC771 (INPUT SELECT) SW CTL 11 15 12 4 2 1 9 10 VCA STEREO FIL TER 75uS DE-EMPH dBX DE-EMPH L+R FIL TER WIDE BAND FIL TER WIDE BAND RMS DET WIDE BAND EXP AND SPECTRAL EXP AND SPE...

7-1 L13SC SCHEMATIC DIAGRAMS / CBA'S AND TEST POINTS Standard Notes Many electrical and mechanical par ts in this chassis have special characteristics. These characteristics oftenpass unnoticed and the protection afforded by them cannot necessarily be obtained by using replacement compo-nents rated ...

A1 A2 A3 A4 B1 B2 B3 B4 C1 C2 C3 C4 D1 D2 D3 D4 E1 E2 E3 E4 F1 F2 F3 F4 VIDEO SIGNAL Main 1/4 Schematic Diagram 7-3 7-4 L2401SCM1 MAIN 1/4 Ref No. Position IC111 C-2 IC151 A-3 Q111 D-1 Q131 A-3 Q161 A-4 Q321 E-1 Q361 B-4 ICS TRANSISTORS

G1 G2 G3 G4 H1 H2 H3 H4 I1 I2 I3 I4 J1 J2 J3 J4 K1 K2 K3 K4 L1 L2 L3 L4 VIDEO SIGNAL AUDIO SIGNAL 7-5 7-6 L2401SCM2 Main 2/4 Schematic Diagram MAIN 2/4 Ref No. Position IC431 G-3 IC771 H-2 IC801 I-3 Q801 J-3 Q811 I-3 CN801 L-4 CN802 L-4 CONNECTORS ICS TRANSISTORS

M1 M2 M3 M4 N1 N2 N3 N4 O1 O2 O3 O4 P1 P2 P3 P4 Q1 Q2 Q3 Q4 R1 R2 R3 R4 IF SIGNAL VIDEO SIGNAL AUDIO SIGNAL Main 3/4 Schematic Diagram L2401SCM3 7-7 7-8 NOTE :The voltage for parts in hot circuit is measuredusing hot GND as a common terminal. CAUTION: FOR CONTINUED PROTECTION AGAINST RISKOF FIRE, RE...

FOCUS-VR(UPPER SIDE) SCREEN-VR(LOWER SIDE) VR661 +B ADJ +B TP601 TP300 G N D Main CBA Top View BECAUSE A HOT CHASSIS GROUND IS PRESENT IN THE POWER SUPPLY CIRCUIT, AN ISOLATION TRANSFORMER MUST BE USED. ALSO, IN ORDER TO HAVE THE ABILITY TO INCREASE THE INPUT SLOWLY, WHEN TROUBLESHOOTING THIS TYPE P...

Q571Base WF8 PIN 4OF CN571 WF12 WF9 PIN 1OF CN571 PIN 3OF WH501A WF10 PIN 7OF IC551 WF11 Q572Collector WF7 WF1 PIN 26OF IC111 WF2 PIN 14OF IC111 PIN 8OF TU11 WF16 WF6 PIN 3OF IC801 Main CBA Bottom View BECAUSE A HOT CHASSIS GROUND IS PRESENT IN THE POWER SUPPLY CIRCUIT, AN ISOLATION TRANSFORMER MUST...

WAVEFORMS L2701WF 8-1 1DIV: 0.5V 20 µ s IC 111 Pin 26 WF1 GND 1DIV: 0.5V 20 µ s IC 111 Pin 14 WF2 1DIV: 2V 20 µ s Q1511 Base WF3 GND 1DIV: 2V 20 µ s Q 1521 Base WF4 GND Input: NTSC Color Bar Signal (with 1kHz Audio Signal) INITIAL POSITION: Unplug unit from AC outlet for at least 5 minutes. reconnec...

WIRING DIAGRAM L2401WI 9-1 CRT CBA FOCUS SCREEN GND D.Y. DY551 HD VD MAIN CBA WH301A CN1501 1 2 CN691 CLN501 CLN301 AC601 1 2 3 4 5 1 2 3 4 5 CN571 5 4 3 2 1 WH301B GND RED GREEN BLUE V501 CRT ANODE L-CH R-CH 1 SP-L 2 SP801SPEAKER CN801 1 SP-R 2 SP802SPEAKER CN802 T571FBT TU11 TUNER UNIT WH501A WH50...

10-1 L2401PIN IC PIN FUNCTIONS IC111 (TV Micro Controller) Pin No. Signal Name Function 1 CNVSS GND 2 N.U. Not Used 3 N.U. Not Used 4 N.U. Not Used 5 GND GND 6 VCC ALL +5V 7 N.U. (GND) 8 FILT FILT 9 HLF Filter for CCD 10 VHOLD VHOLD 11 CVIN Input for Video Signal 12 RESET RESET 13 MCU RESET OUT RESE...

EXPLODED VIEWS Cabinet A-3 A-1 B-5 B-5 B-2 B-2 L-8 L-8 L-8 L-9 L-10 L-8 L-8 L-8 L-8 B-5 B-5 B-2 B-2 B-11 B-11 B-1 SP801 SP802 L-13 B-13 B-13 L-13 A-4 A-2 L1 L1 B2 Scotch Tape #880 Scotch Tape #880 V501 CLN551 DG691 DY551 CRT CBA MAIN CBA AC601 B-3 B12 B12 V501-2 V501-1 DY551 Details for DY551 and su...

11-3 L2401PEX Packing S-5 S-1 Packing Tape Tape X-5 X-2 X-1 FR ONT X-3 X-4 S-2 S-3 S-6 S-4 S-7

20040405 12-1 L2401CA MECHANICAL PARTS LIST PRODUCT SAFETY NOTE: Products marked with a # have special characteristics important to safety. Beforereplacing any of these components, read carefully theproduct safety notice in this service manual. Don'tdegrade the safety of the product through improper...

20040405 13-1 L2401EL ELECTRICAL PARTS LIST PRODUCT SAFETY NOTE: Products marked with a # have special characteristics important to safety. Before replacing any of these components, read care-fully the product safety notice in this service manual.Don't degrade the safety of the product throughimprop...