XTL-750W SERVICE MANUAL US Model Hong Kong Model Tuner unit : XT-992V (US model) Monitor : XVM-750W XT-991V (Hong Kong model) • This set consists of the following units. US model Hong Kong model MONITOR XVM-750W XVM-750W TUNER UNIT XT-992V...
SECTION 3 ELECTRICAL ADJUSTMENTS Inverter Voltage Adjustment MONITOR SECTION Procedure: 1. Display the gray scale on the monitor screen. Equipment Used 2. Connect a digital voltmeter to TP64 on the MONITOR MAIN The measuring equipment below are used for these electrical board.
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γ 0 Adjustment VCOM Adjustment (2) Procedure: Procedure: 1. Display the gray scale on the monitor screen. 1. Display the navigation map screen on the monitor screen. 2. Connect an oscilloscope to TP106 on the MONITOR MAIN 2. Adjust RV211 so as to ensure that the screen has the highest board.
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Adjustment Location: MONITOR MAIN BOARD ( SIDE A ) VCOM γ 2 RV211 RV210 RV213 γ 0 RV212 RV208 RV401 RV201 RV209 RV207 DC/DC BRIGHT RV601 AMPLITUDE CONVERTER R AND B LEVEL INVERTER VOLTAGE VOLTAGE MONITOR MAIN BOARD ( SIDE B ) TP107 TP108 TP106...
TRAP Adjustment (Hong Kong model) TUNER UNIT SECTION Procedure: 1. With the Power off, input the output of TG to TP30 (with DC • Use the following equipment for the electrical adjustment. cut by a capacitor (0.01 µF)). 2. Connect a spectrum analyzer to TP31 (with DC cut by a Equipment capacitor (0.01 µF)).
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RGB Decoder FO Adjustment Procedure: Hong Kong model: 1. Without INPUT1, INPUT2 inputs (no signal input mode), short the jumper wire between TP100 and GND. 2. Connect a frequency counter to TP61. 3. Adjust VR6 so that reading on frequency counter is 4.433619 MHz ±...
XTL-750W 4-2. BLOCK DIAGRAM — TUNER UNIT (VIDEO) SECTION — US MODEL VIDEO INPUT SELECTOR IC30 J10-1 VIDEO NAVI IN CN2 (1/2) MODEL SONY NAVI CN MODEL (NVX) BUFFER CONTROL CONTROL AUX(V) IC21 (3/3) IC22 (2/2) CN MODEL J8-1 VIDEO...
XTL-750W 4-5. SCHEMATIC DIAGRAM — MONITOR SECTION (1/2) — • Refer to page 45 for IC Block Diagrams. Note: • All capacitors are in µF unless otherwise noted. pF: µµF 50 WV or less are not indicated except for electrolytics and tantalums.
XTL-750W 4-9. SCHEMATIC DIAGRAM — TUNER UNIT (1/4) — • Refer to page 47 for IC Block Diagrams. Note: • All capacitors are in µF unless otherwise noted. pF: µµF 50 WV or less are not indicated except for electrolytics and tantalums.
XTL-750W 4-10. SCHEMATIC DIAGRAM — TUNER UNIT (2/4) — • Refer to page 47 for IC Block Diagrams. (Page 43) Note: • All capacitors are in µF unless otherwise noted. pF: µµF • S : B+ Line. • Signal path.
XTL-750W 4-11. SCHEMATIC DIAGRAM — TUNER UNIT (3/4) — • Refer to page 47 for IC Block Diagrams. (Page 38) Note: • All capacitors are in µF unless otherwise noted. pF: µµF 50 WV or less are not indicated except for electrolytics and tantalums.
XTL-750W 4-12. SCHEMATIC DIAGRAM — TUNER UNIT (4/4) — • Refer to page 48 for IC Block Diagrams. (Page 39) Note: • All capacitors are in µF unless otherwise noted. pF: µµF • Voltage is dc with respect to ground under no-signal 50 WV or less are not indicated except for electrolytics condition.
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• IC Block Diagrams IC102 BU2486-46 IC201 IR3Y29B4 24 23 22 18 17 OSC2 CARRIER S-LATCH B DC DET OSC1 SYNC GAMMA 2 DECODER GAMMA 0 INSTRUCTION DECODER 16WORD x 2PAGE x 4BIT RGB AMPLITUDE ADJUST 64WORD x 16PAGE x 8BIT CHROMA OUT DECODER DECODER...
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IC1 PST9145NR IC3 BA6161F BLOCKING OSCILLATOR – COMP IC13 LA7565EM IC17 MM1108XF V SYNC SYNC 1stT PHASE VIDEO COMP IC27 – 29 BA3121F OUT1 OUT2 IC14 TC74HC4052AF IC50 AT24C01 DOUT LOGIC DOUT/ACK TEST Y DEC SERIAL MUX SELECT A EEPROM ADDRESS/COUNTER DATA WORD SELECT B...
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IC18, 25, 26 TC4053BF IC24 CXA1585Q B.COM VCC1 OPEN GND1 SYNC SHARPNESS A.COM SLICE SHP CTL SYNC PULSE C.COM SHP F0 SYNC OPEN Y CLP DLA BIAS TP ADJ ACK TC BURST GATE CHROMA C ADJ C OUT OPEN DLA IN ADD/SUB ACC TC C IN...
SECTION 5 EXPLODED VIEWS NOTE: • -XX and -X mean standardized parts, so • Accessories and packing materials are • The mechanical parts with no reference number in the exploded views are not supplied. they may have some difference from the given in the last of this parts list.
SECTION 6 MONITOR MAIN ELECTRICAL PARTS LIST NOTE: • Due to standardization, replacements in • Items marked “*” are not stocked since When indicating parts by reference the parts list may be different from the they are seldom required for routine service. number, please include the board.