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SERVICE MANUAL
Q U A D
AMPLIFIER
QX-4960
http://www.inter-m.com
MADE IN KOREA
NO: 9007979300
ELECTRICAL ADJUSTMENT PROCEDURE
IDLE CURRENT
A. Setting Set the master volume minimum. B. Connection
TP1 R237 R342 R236 R343
TP2
VOLT METER VR301
VR201 AMP B'D
C. Adjustment Adjust VR301 so that the current through the R237, R236, R342, R343 become 10 milliampere. When that voltage across the "TP1" to "TP2" becomes 10 millivolt, the current becomes 10 milliampere.
CONTENTS
Electrical Adjustment Procedure Specifications Electrical Parts List Top and Bottom View of P.C. Board Wiring Diagram Block Diagram Schematic Diagram Exploded View of Cabinet & Chassis / Mechanical Parts List Ass'y Drawing 1 2 3, 4 5, 6 7 8 9, 10, 11, 12 13, 14 15, 16
1
SPECIFICATIONS
MODEL Power Output Level f=1kHz, THD+N 0.05% (Typical) QUAD RL=8 RL=4 BRIDGED STEREO RL=8 One Channel Driven f=1kHz THD+N 0.05% RL=4 Frequency Response RL=8, P.=1W Power Bandwidth Half Power, THD+N 0.1% STEREO RL=8 Total Harmonic Distortion (THD+N) f=20Hz~20kHz, Half Power QUAD RL=8 RL=4 BRIDGED STEREO RL=8 Channel Separation Half Power RL=8, f=1kHz, ATT. max. Input 600 shunt Residual Noise (DIN Audio Filter) Signal-to-Noise Ratio DIN Audio, Input 600 Shunt Sensitivity (ATT max.) Rated Power into 4 1kHz Input Impedance (ATT max.) Indicators Power Protection (Mute) 4 Clip 4 Signal 4 QX-4960
ELECTRICAL PARTS LIST
Ref No. Part No. Description Value Ref No.
IC701, IC801 IC702 JK701-702, JK801-802 Q701, Q801 R1-2 R701-708, R801-808 R709-710, R809-810 R711, R811 R712, R812 R713, R813 SW701-702, SW801-802
Part No.
2118010432 2168220989 4438090310 2028821134-T 3009102973 3002120953 3009103973 3009472973 3009473973 3009123973 4618999910
Description
IC NJM2068DD JRC IC NJM 2068L JRC JACK COMBINATION CXLF-06L FET 2SK372 BL-TYPE 4 RES CF 1K 1/5W J N RES CF 12K 1/5W FN RES CF 10K 1/5W J N RES CF 4.7K 1/5W J N RES CF 47K 1/5W J N RES CF 12K 1/5W J N SW SS65010-0203-9H-FN
Value
NJM 2068DD NJM 2068L JACK 2SK 372 1K 12K 1% 10K 4.7K 47K 12K SW
POWER B'D (4005185900) 170W 240W 480W 240W 0dB+0.5, 1.5dB: f=DC~55kHz 10Hz~20kHz
AN303, AN406 AN306 AN601-602 BD1 BD401-402 C26 C401-402 C403-406 C407-414 C415-416 C417-418 C4190-420, C422 C421 C423 C424-425 CN301-302 CN401-402, CN405 CN403 D401-405, D407 D406 F6 F6 F6 F401-403 IC401 IC402 INLET1 P401 P402-403 P404 P405-407 PT4 PT4 PT4 PT4 PO401-402 Q401 Q402 Q403 R401 R403 R814 RY401 SW1 4355763615 4355763718 4355863620 2058100998 2058100979 3549472407 3619474153 3419510300 3509472530-T 3409222171-T 3408247161 3409210071-T 3408210261 3409210171-T 3409247071-T 4355923806 4428595003 4428595009 2058100996 2058502240 5568224433 5568224633 5568224533 5508412234 2128610900 2128610800 4448997410 4355789207 4355789306 4355789403 4465998210 2828063200 2828063210 2828063220 2828063230 2438200515 2008606108-T 2028407990 2028406113 3009122973 3009822973 3009102973 5528009993 4625996611 CON ASS'Y 3P FLAT 330MM CON ASS'Y 2P FILAT 420MM CPM ASS'Y 3P FLAT 480MM DIODE KBPC3504 DIODE BRIDGE (KBP01G/KBP153G) CAP SPARK KILLER 0.0047UF 400V CAP POLY TM 0.47UF 250V CAP HM 10000UF/80V 35P*60 CAP CE F 0.0047UF 50V Z CAP AF RSG 220UF 50V SG 10P CAP RSA 470UF 35V SNAP 13P CAP AF RSG 10UF 50V 5P CAP RSG 1000UF 35V SNAP 16P CAP AF RSG 100UF 50V 8P CAP AF RSG 47UF 50V 6P CONNECTOR WAFER 06P (J.ST) LW5267/LWB0640/2.5MM-03P LW5267/LWB0640/2.5MM-09P DIODE RECTIFIER LT1N4006 (4007) DIODE ZENER UZ-24BM (23.1, 25.5) CIRCUIT BREAKER 20A (UL/CSA) CIRCUIT BREAKER 12A (DOM) CIRCUIT BREAKER 10A (EUROPE) FUSE TS 20MM 1A/250V U/C/S IC KA7815 COMMON IC MC7915 COMMON AC INLET 6100.4315 250T SCURTE CON ASS'Y RED CON ASS'Y 1P ORG CON ASS'Y 1P BLK TERMINAL (250) PCB TAB TRANS POWER 120Version (UL/CSA) TRANS POWER 220Version (DOM) TRANS POWER 230Version (EUROPE) TRANS POWER 240Version (EUROPE) THERMISTOR POWER NTC 5D-15 TR NPN KTC2240BL (KTC 3200BL) TR NPN 2SC 3298A(Y), KTC4370A(Y) TR NPN KTD 2058Y (D880Y) RES CF 1.2K 1/5W J N RES CF 8.2K 1/5W J N RES CF 1K 1/5W J N RELAY VH-24H O.E.G/TAKAMISAWA SW POWER (C1350AT) ARCOLECTRIC CON 3P CON 2P CON 3P KBPC 3504 KPBP 152 0.0047/400 0.47/250 10000/80 0.0047/50 220/50 470/35 10/50 1000/35 100/50 47/50 CN 6P CN 3P CN 9P 1N 4006 UZ 24BM 20A (UL/CSA) 12A (DOM) 10A (EUROPE) T1AL/250V 7815 7915 AC INPUT ASS'Y ASS'Y ASS'Y 250T P.T (120Version) P.T (220Version) P.T (230Version) P.T (240Version) TH5D-15 KTC 2240BL KTC 4370 KTD 2058Y 1.2K 8.2K 1K HR-CR6 POWER SWITCH
VR 1/2 B'D (4005185920)
AN201 AN501 C501-504 CN601 LD501, LD504 LD502, LD506 LD503, LD505 Q501-504 R501, R504-508 R502-503, R509-510 R1105-1106 VR501-502 4355763507 4355763800 3409222871-T 4428594903 2300050105 2300052105 2300050105 2008606108-T 3089332275 3009223973 3009472973 3228075410 CON ASS'Y 8P FLAT 150MM CON ASS'Y 6P S/D CAP AF RSG 0.22UF 50V 5P LA5268/LAB0640/2.5MM-03P LED LTL-307E-041A LITEON LED LTL-307G-041A LITEON LED LTL-307E-041A LITEON TR NPN KTC2240BL (KTC3200BL) RES NFR 3.3K 1/4W J R PHILKO RES CF 22K 1/5W J N RES CF 4.7K 1/5W J N VR PI16 10KB (21 DETENT) CON 8P CON 6P 0.22/50 CN 3P GRE (EL204GD) RED (SLR34UR) RED (SLR34UR) KTC 2240BL FR 3.3K 22K 4.7K 10KB
0.05% 0.07% 0.07% 80dB 85dB: ATT min. 100dB 0dB 20k (Balance/Unbalance) (Red) (Red) (Orange) (Green)
VR 3/4 B'D (4005185930)
AN202 AN802 C1001-1004 CN602 LD1001, LD1006 LD1002, LD1005 LD1003, LD1004 Q1001-1004 R1001, R1004-1008 R1002-1003, R1009-1010 R1103-1104 VR1101-1102 4355763507 4355763800 3409222871-T 4428594903 2300052105 2300050105 2300050105 2008606108-T 3089332275 3009223973 3009472973 3228075410 CON ASS'Y 8P FLAT 150MM CON ASS'Y 6P S/D CAP AF RSG 0.22UF 50V 5P LA5268/LAB0640/2.5MM-03P LED LTL-307E-041A LITEON LED LTL-307G-041A LITEON LED LTL-307E-041A LITEON TR NPN KTC2240BL (KTC 3200BL) RES NFR 3.3K 1/4W J R PHILKO RES CF 22K 1/5W J N RES CF 4.7K 1/5W J N VR PI16 10KB (21 DETENT) CON 8P CON 6P 0.22/50 CN 3P GRE (EL204GD) RED (SLR34UR) RED (SLR34UR) KTC 2240BL FR 3.3K 22K 4.7K 10KB
Protection PC Limiter Fan Circuit Controls
Power SW ON/OFF muting Heatsink Temp 100°C (212°F) RL=2 -50°C (122°F)-60°C (140°F) Low-Speed Variable Hi-Speed (Front) Power SW: Push up On/Push down Off Attenuator: 21-position dB calibrated (Rear) Mode Sw: Bridged/Stereo/Parallel X-OVER SW AC 110V240V, 50/60Hz 770W 17kg 482(W) 88(H) 369(D) mm Input Combination Jack (Balance) Output 5-Way binding posts 4
FREQ VR B'D (4005185900)
AN302-302A, 4355764013 AN305-305A VR301-302 3238085510 CON ASS'Y 5P S/D 270MM VR RK0971410A0353C 503C X 4
POWER LED B'D (4005185940)
AN407 4355763718 L1101 2300050100 R1101-1102 3009622973 CON ASS'Y 2P FILAT 420MM LED LTL-307E LITEON RES CF 6.2K 1/5W J N CON ASS'Y 2P LTL-307E012A 6.2K
INPUT B'D (4005185910)
AN301 C610, C710-713, C810, C812-813 C701-702, C706-707, C801-802, C806-807 C704-705 C709, C809 C714, C811 CN406, CN702A, CNB802 CN701, CN802 D701-707, D801-807 4355764114 3409247071-T CON ASS'Y 6P S/D 300MM CAP AF RSG 47UF 50V 6P CON 6P 47/50
Power Source Power Consumption Weight Dimensions Connectors
AMP B'D (4005186000)
C1-2 C107 C108-109, C206, C306 C201, C301 C202, C302 C205, C305 C208, C308 C209-210, C309-310 C213-214, C313-314 C218, C307 C603, C608, C612, C621 3409215971-T 3409210141-T 3409810141-T 3409547031-T 3688471118 3698152198 3678050177 3609222120-T 3609104122-T 3678220177 3609393120-T CAP AF RSG 1.5UF 50V 5P CAP AF RSG 100UF 25V 6P CAP AF NP 100UF 25V CAP AF 47UF 16V (MOSE) CAP MO SR22C 471JA CAP NPP POLY 152J 2J CAP M1 DM1 C 050D5 CAP MA 0.0022UF 100V J CAP MA 0.1UF 100V J SMALL CAP M1 DM 5C 220J5 CAP MA 0.039UF 100V J 1.5/50 100/25 100/25 NP 47/16 471JA 152J 050D5 0.0022M 0.1/100 (M) 220J5 0.039/100 (M)
3529560311-A
CAP CE SL 56PF 50V J AXIAL
56P
ACTIVE CROSSOVER
Crossover Frequency Crossover Slope LOW Filter From 60Hz to 250Hz or 600Hz to 2.5kHz 24dB/octave Roll/off (Linkwitz Filter) 40Hz (12dB/octave)
3409222071-T 3509101231-A 3539104531-A 4428595003
CAP AF RSG 22UF 50V 5P CAP CE B 100PF 50V K AXIAL CAP CE Y 100000PF 50V Z AXIAL LW5267/LWB0640/2.5MM-03P
22/50 100P 100000P CN 3P
4428595004 2058304100
LW5267/LWB0640/2.5MM-04P DIODE IN4148
CN 4P 1N 4148
* Specifications and design subject to change without notice for improvements.
2 3
TOP AND BOTTOM VIEW OF P.C. BOARD
Ref No.
C605, C610, C613, C623 C614, C617 C615 C616, C618 C624-627 CN2, CN304, CN306 CN201 CN202 CN203A, CN203B CN301 CN302, CN305 D111 D201-209, D214, D301-309, D314, D601-603 D210-211, D310-311 D212-213, D312-313 IC102 IC601-603 J201, J301 L201, L301 PO201, PO301 PO303 PO304 Q101, Q204-205, Q209, Q304-305, Q309 Q201, Q210, Q217-218, Q301, Q310, Q317-318 Q202-203, Q302-303 Q206, Q306 Q207, Q307 Q208, Q308 Q211, Q311 Q212, Q312 Q213, Q215, Q313, Q315, Q214, Q215, Q314, Q316 Q601-606 R110, R114 R111, R352-353 R112, R202, R210-212, R302, R310-312, R612 R113 R115-116, R255-256, R268, R271, R273, R365-366, R368, R371, R373 R201, R301 R203, R303 R204, R208-209, R304, R308-309
Part No.
3609392120-T 3609683120-T 3539104531-A 3409247071-T 3509331231-A 4428595003 4428595008 4355923806 4355923804 4428595006 4428595005 2058100996 2058304100
Description
CAP MA 0.0039UF 100V J CAP MA 0.068UF 100V J CAP CE Y 100000PF 50V Z AXIAL CAP AF RSG 47UF 50V 6P CAP CE B 330PF 50V K AXIAL LW5267/LWB0640/2.5MM-03P LW5267/LWB0640/2.5MM-08P CONNECTOR WAFER 06P (J.ST) CONNECTOR WAFER 04P (J.ST) LW5267/LWB0640/2.5MM-06P LW5267/LWB0640/2.5MM-05P DIODE RECTIFIER LT1N4006 (4007) DIODE IN4148
Value
0.0039/100 (M) 0.068/100 (M) 100000P 47/50 330P CN 3P CN 8P CN 6P CN 4P CN 6P CN 5P 1N 4006 1N 4148
Ref No.
R205, R305, R624 R206, R306, R623 R207, R307 R213, R313 R214-215, R314-315 R216, R316 R217, R317 R218-219, R318-319 R220-221, R320-321 R222-223, R226-229, R322-323, R326-329 R224-225, R324-325 R230-231, R330-331 R232-233, R238-239, R332-333, R338-339 R234-235, R240-241, R334-335, R340-341 R236-237, R242-243, R336-337, R342-343 R250, R350 R251, R351 R258, R358 R269, R369 R270, R272, R370, R372 R275, R357 R354 R601-603, R617 R604 R605 R606, R608, R610, R615 R607, R611 R609 R613 RL201 SP1-4 VR201, VR301
Part No.
3009123973 3009102973 3009121973 3009100973 3089820275 3009182973 3009471973 3002220953 3089100275 3089221275
Description
RES CF 12K 1/5W J N RES CF 1K 1/5W J N RES CF 120 1/5W J N RES CF 10 1/5W J N RES NFR 82 1/4W J R PHILKO RES CF 1.8K 1/5W J N RES CF 470 1/5W J N RES CF 22K 1/5W F N RES NFR 10 1/4W J R PHILKO RES NFR 220 1/4W J R PHILKO 12K 1K
Value
120 10 FR 82 1.8K 470 22K 1% FR 10 FR 220
3009333973 3089332275 3089479275
RES CF 33K 1/5W J N RES NFR 3.3K 1/4W J R PHILKO RES NFR 4.7 1/4W J R PHILKO
33K FR 3.3K FR 4.7
2058322100 2058100110 2118050410 2118010432 4408194903 2648099940 2438007994 2438007993 2438007995 2008606108-T
DIODE 1SS145 ROHM DIODE PS2010 PYUNG CHANG IC TA7317P TOSHIBA IC NJM2068DD JRC PIN HEADER 3P COIL INDUCTOR 1.2UM POSISTOR PTH 59F04 BE 471TS POSISTOR PTH 9M04 BE 222TS 2F POSISTOR PTH 9M04 BH 471TS 2F TR NPN KTC2240BL (KTC 3200BL)
ISS 145 PS 2010 TA 7317P NJM 2068DD PIN 3P 1.2uH BE471TS BE222TS BE471TS KTC 2240BL
3079101275
RES ERD-2FCVG 101T 1/4W R
FR 100
3049478783
RES CE 0.47 5W J T HAN NAE
0.47 5W
2008206104-T
TR PNP KTA 1268BL
KTA 1268BL
3039479575-T 3039100575-T 3009224973 3009103973 3009221973 3009683973 3009184973 3003324953 3002470953 3003470953 3002150953 3003115953 3004806953 3009823973 5528009950 4438090210 3248347110
RES MO 4.7 2W J RADIAL RES MO 10 2W JR RES CF 220K 1/5W J N RES CF 10K 1/5W J N RES CF 220 1/5W J N RES CF 68K 1/5W J N RES CF 180K 1/5W J N RES CF 3.24K 1/5W F N RES CF 47K 1/5W F N RES CF 4.7K 1/5W F N RES CF 15K 1/5W F N RES CF 1.15K 1/5W F N RES CF 806 1/5W FN RES CF 82K 1/5W J N RELAY CR 323 DC24V TERMINAL BINDING POST 2P RES SEMI RH 470 SIDE ADJ
4.7/2W 10 2W 220K 10K 220 68K 180K 3.24K 1% 47K 1% 4.7K 1% 15K 1% 1.15K 1% 806 1% 82K CR323 BINDING POST 470B
2008206106-T 2008005999 2008405999 2008400960 2028407990 2028107984 2028427998 2028117994 2028821134-T 3009822973 3009104973 3009473973
TR PNP KTA2400G KEC TR PNP 2SA 1546 NEC TR NPN 2SC4001 NEC TR NPN 2SC 1567A-R MATSUSHITA TR NPN 2SC 3298A (Y), KTC4370A (Y) TR PNP 2SA 1306A (Y), KTA1659A (Y) TR 2SC 3856 W/ACC TR PNP 2SA 1492 W/ACC FET 2SK372 BL-TYPE 4 RES CF 8.2K 1/5W J N RES CF 100K 1/5W J N RES CF 47K 1/5W J N
KTA 2400G 2SA 1546 2SC 4001 2SC 1567A 2SC 3298A 2SA 1306A 2SC 3856 2SA 1492 2SK 372 8.2K 100K 47K
3009682973 3009223973
RES CF 6.8K 1/5W J N RES CF 22K 1/5W J N
6.8K 22K
3009271973 3003120953 3009561973
RES CF 270 1/5W J N RES CF 1.2K 1/5W FN RES CF 560 1/5W J N
270 1.2K 1% 560
4
5
WIRING DIAGRAM
6
7
BLOCK DIAGRAM
8
SCHEHATIC DIAGRAM
9
10
11
12
EXPLODED VIEW OF CABINET & CHASSIS/MECHANICAL PARTS LIST
S11 S10 S9 S8 S7 S6 S5 S4 S3 S2
ASS'Y PM 4X18B DOT SCREW BM 3X8B DOT SCREW 2BTC 3X10B ASS'Y PM 4X16N HEX MSPM 3X12Y ASS'Y PM3X22B SCREW 3BTC 4X18Y SCREW 3BTC 4X8B SCREW BM 4X8B SCREW 3BTC 3X6B SCREW BM 3X6N PART NAME
8095996930 8095996720 8095996520 8095997010 8099130121 8095997110 8109340181 8109340083 8009140083 8109330063 8009130064 PART NUMBER
1 2 13 8 32 4 4 16 8 12 5 Q'TY REMARK
S2 S7 S6 17
S1 NO.
28
WASHER SPRING NUT M10B FOOT&FOOT FELT POWER TRANS AC CORD AC INLET CIRCUIT BREAKER BKT SUPPORT KNOB CONTROL KNOB SLIDE BKT GND FAN COVER BKT (REAR) FAN FAN BKT SPACER SPACER HOLDER DIODE POWER SW BKT (HEAT SINK) LED LIMITS KNOB CONTROL BKT (HANDLE) HANDLE TOP COVER HEAT SINK CHASSIS MAIN PANEL FRONT PART NAME
8309100013 8209110013 056335999520 2828063210 4308997310 4448997410 5568224533 6505936710 6503973410 8545084520 8545084520 6505955520 6538999110 046505939911 7308999010 046505968210 6705998310 6705998410 2058100998 4625996611 6505939810 8545993390 048543985811 6505940010 048603995220 046122095910 7502090910 046121678021 046121678011 048601992414 048601992413 PART NUMBER
1 1 4 1 1 1 1 1 2 2 4 2 2 2 2 4 4 4 1 1 4 1 4 2 2 1 2 1 1 1 Q'TY QD-4960 QX-4960 QD-4960 QX-4960 REMARK QD-4960 REMOVE QD-4960 QX-4960
14
27
4
15
S1
26 25 24
12
20
25
23 22 21 20
13
16
19 18
3 S3 19 2 18 S11 9 11 S5 23 S5 22
21
17 16 15 14 13 12 11 10 9
24
S8
8 7 6 5 4
6
1
3 2 1 NO.
8
S4
S3
10
26 28
7
27
5
13
14
ASS'Y DRAWING
15
16