SERVICE MANUAL AUDIO/VIDEO CONTROL RECEIVER MB172 2004 RX-7042S Area suffix J ----------------------------- U.S.A. C -------------------------- Canada TABLE OF CONTENTS PRECAUTION............... . . 1-3 SPECIFIC SERVICE INSTRUCTIONS .
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SPECIFICATION Amplifier Output Power Ω At Stereo Front ch 130 W per channel, min. RMS, driven into 8 , 20 Hz to 20 kHz, with no more than 0.08% total harmonic Operation distortion. Ω At Surround Front ch 130 W per channel, min. RMS, driven into 8 at 1 kHz, with no more than 0.8% total harmonic distortion.
SECTION 1 PRECAUTION Safety Precautions (1) This design of this product contains special hardware and voltmeter. many circuits and components specially for safety purpos- Move the resistor connection to each exposed metal es. For continued protection, no changes should be made part, particularly any exposed metal part having a return to the original design unless authorized in writing by the path to the chassis, and measure the AC voltage across...
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Importance administering point on the safety Power / fuse board 6.3A-125V Power trans 1 board Caution: For continued protection against risk of fire, replace only with same type 6.3A/125V for F1, 2A/125V for F61 and F62. This symbol specifies type of fast operating fuse. Precaution: Pour eviter risques de feux, remplacez le fusible de surete de F1 comme le meme type que 6.3A/125V, et 2A/125V pour F61 et F62.
SECTION 3 DISASSEMBLY Removing the top cover (See Fig.1) (1) From the right and left sides of the main body, remove the four screws A attaching the top cover. Top cover (2) From the back side of the main body, remove the three screws B attaching the top cover.
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Removing the rear panel (See Fig.4) • Prior to performing the following procedures, remove the top Strain relief cover. (1) From the back side of the main body, remove the strain re- lief from the rear panel in the direction of the arrow. (2) Remove the twenty-nine screws E, two screws F and three screws G attaching the rear panel.
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Removing the micon board (See Fig.7) • Prior to performing the following procedures, remove the top cover, rear panel, I/O board, tuner, DSP board, audio board, Main board video board and S-video board. CN831 (1) From the top side of the main body, disconnect the card on the micon board.
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Removing the main board (See Fig.9) • Prior to performing the following procedures, remove the top Front board(R) Front board(L) cover. Surround board Center board (1) From the top side of the main body, remove the tie bands CN881 Tie band bundling the wires.
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3.10 Removing the center board, surround back board, front boards (L/R) and surround boards (L/R) (See Figs.10 and 12) • Prior to performing the following procedures, remove the top Front board(R) Front board(L) cover and main board. (1) From the reverse side of the main board, remove the two screws P attaching the main board to the heat sink.
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3.13 Removing the power supply board Power supply board (See Fig.14) CN402 Card wire Headphone • Prior to performing the following procedures, remove the top jack board cover. (1) From the top side of the main body, disconnect the parallel wires from the connector CN55 on the power transformer...
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3.17 Removing the front key & system control board (See Figs.17 to 20) • Prior to performing the following procedures, remove the top Front panel assembly cover, front panel assembly, switch board and power switch Volume knob board. (1) Pull out the volume and jog knobs from the front side of the front panel assembly, remove the nut attaching the front key &...
SECTION 4 ADJUSTMENT Adjustment method Tuner section 1. Tuner range 87.5MHz to 108.0MHz 530kHz to 1710kHz Power amplifier section Adjustment of idling current Measurement location B2204-82205 (Lch), B2213-B2214 (Rch) Adjustment part VR787 (Lch), VR788 (Rch) Attention: This adjustment does not obtain a correct adjustment value immediately after the amplifier is used (state that an in- ternal temperature has risen).
SECTION 5 TROUBLESHOOTING Self-diagnose function This model incorporates the following self-diagnostic functions. 1. PROTECTOR • The PROTECTOR IN port detects errors such as speaker overcurrent and DC voltage output errors (Active: L). Immediately after detection, all relays are switched off and the alarm display as shown below (blinking at intervals of 0.5 sec. ON and 0.5 sec. OFF) is displayed in the lower part of the FL matrix.
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VICTOR COMPANY OF JAPAN, LIMITED AV & MULTIMEDIA COMPANY AUDIO/VIDEO SYSTEMS CATEGORY 10-1,1chome,Ohwatari-machi,Maebashi-city,371-8543,Japan (No.MB172) Printed in Japan...
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SCHEMATIC DIAGRAMS AUDIO/VIDEO CONTROL RECEIVER RX-7042S CD-ROM No.SML200403 Area suffix J ----------------------------- U.S.A. C -------------------------- Canada Contents Block diagram Standard schematic diagrams 2-23 to 33 Printed circuit boards No.MB172SCH COPYRIGHT 2004 VICTOR COMPANY OF JAPAN, LTD. 2004/3...
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In regard with component parts appearing on the silk-screen printed side (parts side) of the PWB diagrams, the parts that are printed over with black such as the resistor ( ), diode ( ) and ICP ( ) or identified by the " " mark nearby are critical for safety.
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PW10 PW20 PW11 PW17 PW12 PW13 PW14 PW15 PW16 PW26 PW18 PW28 PW19 PW29 PW30 PW40 3.3M 0.0047/100 KRC105M QSK0098-001 1SS133 KTD863/Y/ 1000/25 470/16 EP51 Parts are safety assurance parts. When replacing those parts make sure to use the specified one. SHEET 1...
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VICTOR COMPANY OF JAPAN, LIMITED AV & MULTIMEDIA COMPANY AUDIO/VIDEO SYSTEMS CATEGORY 10-1,1chome,Ohwatari-machi,Maebashi-city,371-8543,Japan Printed in Japan (No.MB172SCH)
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PARTS LIST [ RX-7042S ] * All printed circuit boards and its assemblies are not available as service parts. Area suffix J ----------------------------- U.S.A. C -------------------------- Canada - Contents - 3- 2 Exploded view of general assembly and parts list (Block No.M1) 3- 5 Electrical parts list (Block No.01~06)
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Exploded view of general assmbly and parts list Block No. Power trans board Power trans board Relay board Power switch board Power supply Headphone jack board board Switch board Front key & System control board...
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Power trans board I/O board Power trans Power/Fuse board board Stopper board Stopper Speaker board board Relay board Micon board Main board supply board...
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LV43458-002A JOG KNOB ASSY QMF51U1-6R3-J8 FUSE 6.3A AC125V QMF51U1-2R0-J8 FUSE 2A AC125V(x2) LV10469-030A FRONT PANEL LV43517-001A FUSE CAUTION LV43338-002A JVC MARK E409396-003 CAUTION LABEL 7042SC LV21438-001A LENS E409394-001 CAUTION LABEL 7042SJ LV10767-004A SUB PANEL QYSBSG3008E TAPPING SCREW 3mm x 8mm(x3)
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Electrical parts list Main board Symbol No. Part No. Part Name Description Local Block No. [0][1][0][0] R844 QRE141J-104Y C RESISTOR 100kΩ 1/4W J Symbol No. Part No. Part Name Description Local R845 QRE141J-823Y C RESISTOR 82kΩ 1/4W J R846 QRE141J-104Y C RESISTOR 100kΩ...
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DIGI TRANSISTOR 7042SJ C423 NCB31HK-103X C CAPACITOR 0.01uF 50V K Q254 KTA1267/YG/-T TRANSISTOR C424 NCB31HK-103X C CAPACITOR 0.01uF 50V K Q301 2SC3576-JVC-T TRANSISTOR C425 NCB31HK-103X C CAPACITOR 0.01uF 50V K Q302 2SC3576-JVC-T TRANSISTOR C427 NCF31AZ-105X C CAPACITOR 1uF 10V Z Q303...
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Symbol No. Part No. Part Name Description Local Symbol No. Part No. Part Name Description Local R351 NRSA63J-682X MG RESISTOR 6.8kΩ 1/16W J R480 NRSA63J-152X MG RESISTOR 1.5kΩ 1/16W J R352 NRSA63J-682X MG RESISTOR 6.8kΩ 1/16W J R481 NRSA63J-222X MG RESISTOR 2.2kΩ...
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Block No. [0][3][0][0] Symbol No. Part No. Part Name Description Local Symbol No. Part No. Part Name Description Local QETN1HM-226Z E CAPACITOR 22uF 50V M QETN1HM-226Z E CAPACITOR 22uF 50V M PW12 QUB111-16PPPP WIRE QETN1HM-105Z E CAPACITOR 1uF 50V M PW16 QUB116-16PPPP PIN WIRE...
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Symbol No. Part No. Part Name Description Local Symbol No. Part No. Part Name Description Local R969 NRSA63J-103X MG RESISTOR 10kΩ 1/16W J Q704 2SC2240-BL/AB/T TRANSISTOR R971 QRJ146J-120X UNF C RESISTOR 12Ω 1/4W J Q705 KTA1268/GL/-T TRANSISTOR R973 QRJ146J-332X UNF C RESISTOR 3.3kΩ...
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Symbol No. Part No. Part Name Description Local Symbol No. Part No. Part Name Description Local D1891 1SS133-T2 DIODE C1844 QETN2AM-476Z E CAPACITOR 47uF 100V M D1892 1SS133-T2 DIODE C1851 QCS32HJ-470Z C CAPACITOR 47pF 500V J D1901 1SS133-T2 DIODE C1852 QCS32HJ-470Z C CAPACITOR 47pF 500V J...
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Symbol No. Part No. Part Name Description Local Symbol No. Part No. Part Name Description Local R787 QRE141J-473Y C RESISTOR 47kΩ 1/4W J R1864 QRL027J-100 OMF RESISTOR 10Ω 2W J R788 QRE141J-473Y C RESISTOR 47kΩ 1/4W J R1871 QRE141J-391Y C RESISTOR 390Ω...
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10pF 50V J C1396 QETN0JM-477Z E CAPACITOR 470uF 6.3V M Q1310 KRA104S-X DIGI TRANSISTOR C1397 QETN1AM-107Z E CAPACITOR 100uF 10V M Q1313 2SC3576-JVC-T TRANSISTOR C1398 QETN1AM-107Z E CAPACITOR 100uF 10V M Q1314 2SC3576-JVC-T TRANSISTOR C1431 QETN1HM-475Z E CAPACITOR 4.7uF 50V M...
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Symbol No. Part No. Part Name Description Local Symbol No. Part No. Part Name Description Local R1387 NRSA63J-750X MG RESISTOR 75Ω 1/16W J IC681 JCV8009-W R1388 NRSA63J-750X MG RESISTOR 75Ω 1/16W J IC682 MN35505-X R1389 NRSA63J-750X MG RESISTOR 75Ω 1/16W J IC683 SN74AHC2G74T-X R1390...
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Symbol No. Part No. Part Name Description Local Symbol No. Part No. Part Name Description Local C2242 NCF31CZ-104X C CAPACITOR 0.1uF 16V Z C2679 NCF31CZ-104X C CAPACITOR 0.1uF 16V Z C2243 NCB31HK-562X C CAPACITOR 5600pF 50V K C2680 QETN0JM-107Z E CAPACITOR 100uF 6.3V M C2244 NCB31HK-562X...
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Symbol No. Part No. Part Name Description Local Symbol No. Part No. Part Name Description Local R2110 NRSA63J-104X MG RESISTOR 100kΩ 1/16W J R2303 NRSA63J-102X MG RESISTOR 1kΩ 1/16W J R2111 NRSA63J-102X MG RESISTOR 1kΩ 1/16W J R2309 NRSA63J-104X MG RESISTOR 100kΩ...
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Symbol No. Part No. Part Name Description Local Symbol No. Part No. Part Name Description Local R2643 NRSA63J-470X MG RESISTOR 47Ω 1/16W J R2876 NRSA63J-332X MG RESISTOR 3.3kΩ 1/16W J R2644 NRSA63J-470X MG RESISTOR 47Ω 1/16W J R2921 NRSA63J-182X MG RESISTOR 1.8kΩ...
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Packing materials and accessories parts list Block No. A1, A3, A4, A5, A7, A8 Packing and accessories Symbol No. Part No. Part Name Description Local Block No. [M][3][M][M] LV21445-016A CARTON BOX LV35186-001A CARTON SPACER Symbol No. Part No. Part Name Description Local LV20947-001A...