Inter M qx4960 schematic
SERVICE
MANUAL
Q U A D
AMPLIFIER
QX-4960
http://www.inter-m.com
MADE IN KOREA
NO: 9007979300
1
Electrical Adjustment Procedure 1
Specifications
2
Electrical Parts List
3, 4
Top and Bottom View of P.C. Board
5, 6
Wiring Diagram 7
Block Diagram 8
Schematic Diagram 9, 10, 11, 12
Exploded View of Cabinet & Chassis / Mechanical Parts List
13, 14
Ass’y Drawing
15, 16
CONTENTS
IDLE CURRENT
A. Setting
Set the master volume minimum.
B. Connection
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.
ELECTRICAL ADJUSTMENT PROCEDURE
TP1 TP2
R237
R342
R236
R343
VR201
VR301
AMP B’D
VOLT METER
Crossover Frequency From 60Hz to 250Hz or 600Hz to 2.5kHz
Crossover Slope 24dB/octave Roll/off (Linkwitz Filter)
LOW Filter 40Hz (12dB/octave)
2 3
SPECIFICATIONS ELECTRICAL PARTS LIST
IC701, IC801 2118010432 IC NJM2068DD JRC NJM 2068DD
IC702 2168220989 IC NJM 2068L JRC NJM 2068L
JK701-702, 4438090310 JACK COMBINATION CXLF-06L JACK
JK801-802
Q701, Q801 2028821134-T FET 2SK372 BL-TYPE 4 2SK 372
R1-2 3009102973 RES CF 1K 1/5W J N 1K
R701-708, 3002120953 RES CF 12K 1/5W FN 12K 1%
R801-808
R709-710, 3009103973 RES CF 10K 1/5W J N 10K
R809-810
R711, R811 3009472973 RES CF 4.7K 1/5W J N 4.7K
R712, R812 3009473973 RES CF 47K 1/5W J N 47K
R713, R813 3009123973 RES CF 12K 1/5W J N 12K
SW701-702, 4618999910 SW SS65010-0203-9H-FN SW
SW801-802
AN201 4355763507 CON ASS’Y 8P FLAT 150MM CON 8P
AN501 4355763800 CON ASS’Y 6P S/D CON 6P
C501-504 3409222871-T CAP AF RSG 0.22UF 50V 5P 0.22/50
CN601 4428594903 LA5268/LAB0640/2.5MM-03P CN 3P
LD501, 2300050105 LED LTL-307E-041A LITEON GRE (EL204GD)
LD504
LD502, 2300052105 LED LTL-307G-041A LITEON
RED (SLR34UR)
LD506
LD503, 2300050105 LED LTL-307E-041A LITEON
RED (SLR34UR)
LD505
Q501-504 2008606108-T TR NPN KTC2240BL (KTC3200BL) KTC 2240BL
R501, 3089332275 RES NFR 3.3K 1/4W J R PHILKO FR 3.3K
R504-508
R502-503, 3009223973 RES CF 22K 1/5W J N 22K
R509-510
R1105-1106 3009472973 RES CF 4.7K 1/5W J N 4.7K
VR501-502 3228075410 VR PI16 10KB (21 DETENT) 10KB
AN202 4355763507 CON ASS’Y 8P FLAT 150MM CON 8P
AN802 4355763800 CON ASS’Y 6P S/D CON 6P
C1001-1004 3409222871-T CAP AF RSG 0.22UF 50V 5P 0.22/50
CN602 4428594903 LA5268/LAB0640/2.5MM-03P CN 3P
LD1001, 2300052105 LED LTL-307E-041A LITEON GRE (EL204GD)
LD1006
LD1002, 2300050105 LED LTL-307G-041A LITEON
RED (SLR34UR)
LD1005
LD1003, 2300050105 LED LTL-307E-041A LITEON
RED (SLR34UR)
LD1004
Q1001-1004 2008606108-T TR NPN KTC2240BL (KTC 3200BL) KTC 2240BL
R1001, 3089332275 RES NFR 3.3K 1/4W J R PHILKO FR 3.3K
R1004-1008
R1002-1003, 3009223973 RES CF 22K 1/5W J N 22K
R1009-1010
R1103-1104 3009472973 RES CF 4.7K 1/5W J N 4.7K
VR1101-1102
3228075410 VR PI16 10KB (21 DETENT) 10KB
AN407 4355763718 CON ASS’Y 2P FILAT 420MM CON ASS’Y 2P
L1101 2300050100 LED LTL-307E LITEON LTL-307E012A
R1101-1102 3009622973 RES CF 6.2K 1/5W J N 6.2K
C1-2 3409215971-T CAP AF RSG 1.5UF 50V 5P 1.5/50
C107 3409210141-T CAP AF RSG 100UF 25V 6P 100/25
C108-109, 3409810141-T CAP AF NP 100UF 25V 100/25 NP
C206, C306
C201, C301 3409547031-T CAP AF 47UF 16V (MOSE) 47/16
C202, C302 3688471118 CAP MO SR22C 471JA 471JA
C205, C305 3698152198 CAP NPP POLY 152J 2J 152J
C208, C308 3678050177 CAP M1 DM1 C 050D5 050D5
C209-210, 3609222120-T CAP MA 0.0022UF 100V J 0.0022M
C309-310
C213-214, 3609104122-T CAP MA 0.1UF 100V J SMALL 0.1/100 (M)
C313-314
C218, C307 3678220177 CAP M1 DM 5C 220J5 220J5
C603, C608, 3609393120-T CAP MA 0.039UF 100V J 0.039/100 (M)
C612, C621
Ref No. Part No. ValueDescriptionRef No. Part No. ValueDescription
AN303, 4355763615 CON ASS’Y 3P FLAT 330MM CON 3P
AN406
AN306 4355763718 CON ASS’Y 2P FILAT 420MM CON 2P
AN601-602 4355863620 CPM ASS’Y 3P FLAT 480MM CON 3P
BD1 2058100998 DIODE KBPC3504 KBPC 3504
BD401-402 2058100979 DIODE BRIDGE (KBP01G/KBP153G) KPBP 152
C26 3549472407 CAP SPARK KILLER 0.0047UF 400V 0.0047/400
C401-402 3619474153 CAP POLY TM 0.47UF 250V 0.47/250
C403-406 3419510300 CAP HM 10000UF/80V 35P*60 10000/80
C407-414 3509472530-T CAP CE F 0.0047UF 50V Z 0.0047/50
C415-416 3409222171-T CAP AF RSG 220UF 50V SG 10P 220/50
C417-418 3408247161 CAP RSA 470UF 35V SNAP 13P 470/35
C4190-420, 3409210071-T CAP AF RSG 10UF 50V 5P 10/50
C422
C421 3408210261 CAP RSG 1000UF 35V SNAP 16P 1000/35
C423 3409210171-T CAP AF RSG 100UF 50V 8P 100/50
C424-425 3409247071-T CAP AF RSG 47UF 50V 6P 47/50
CN301-302 4355923806 CONNECTOR WAFER 06P (J.ST) CN 6P
CN401-402, 4428595003 LW5267/LWB0640/2.5MM-03P CN 3P
CN405
CN403 4428595009 LW5267/LWB0640/2.5MM-09P CN 9P
D401-405, 2058100996 DIODE RECTIFIER LT1N4006 (4007) 1N 4006
D407
D406 2058502240 DIODE ZENER UZ-24BM (23.1, 25.5) UZ 24BM
F6 5568224433 CIRCUIT BREAKER 20A (UL/CSA) 20A (UL/CSA)
F6 5568224633 CIRCUIT BREAKER 12A (DOM) 12A (DOM)
F6 5568224533 CIRCUIT BREAKER 10A (EUROPE) 10A (EUROPE)
F401-403 5508412234 FUSE TS 20MM 1A/250V U/C/S T1AL/250V
IC401 2128610900 IC KA7815 COMMON 7815
IC402 2128610800 IC MC7915 COMMON 7915
INLET1 4448997410 AC INLET 6100.4315 250T SCURTE AC INPUT
P401 4355789207 CON ASS’Y RED ASS’Y
P402-403 4355789306 CON ASS’Y 1P ORG ASS’Y
P404 4355789403 CON ASS’Y 1P BLK ASS’Y
P405-407 4465998210 TERMINAL (250) PCB TAB 250T
PT4 2828063200 TRANS POWER 120Version (UL/CSA)
P.T (120Version)
PT4 2828063210 TRANS POWER 220Version (DOM)
P.T (220Version)
PT4 2828063220 TRANS POWER 230Version (EUROPE)
P.T (230Version)
PT4 2828063230 TRANS POWER 240Version (EUROPE)
P.T (240Version)
PO401-402 2438200515 THERMISTOR POWER NTC 5D-15 TH5D-15
Q401 2008606108-T TR NPN KTC2240BL (KTC 3200BL) KTC 2240BL
Q402 2028407990 TR NPN 2SC 3298A(Y), KTC4370A(Y) KTC 4370
Q403 2028406113 TR NPN KTD 2058Y (D880Y) KTD 2058Y
R401 3009122973 RES CF 1.2K 1/5W J N 1.2K
R403 3009822973 RES CF 8.2K 1/5W J N 8.2K
R814 3009102973 RES CF 1K 1/5W J N 1K
RY401 5528009993 RELAY VH-24H O.E.G/TAKAMISAWA HR-CR6
SW1 4625996611 SW POWER (C1350AT) ARCOLECTRIC
POWER SWITCH
AN302-302A, 4355764013 CON ASS’Y 5P S/D 270MM
AN305-305A
VR301-302 3238085510 VR RK0971410A0353C 503C X 4
AN301 4355764114 CON ASS’Y 6P S/D 300MM CON 6P
C610, 3409247071-T CAP AF RSG 47UF 50V 6P 47/50
C710-713,
C810,
C812-813
C701-702, 3529560311-A CAP CE SL 56PF 50V J AXIAL 56P
C706-707,
C801-802,
C806-807
C704-705 3409222071-T CAP AF RSG 22UF 50V 5P 22/50
C709, C809 3509101231-A CAP CE B 100PF 50V K AXIAL 100P
C714, C811 3539104531-A CAP CE Y 100000PF 50V Z AXIAL 100000P
CN406, 4428595003 LW5267/LWB0640/2.5MM-03P CN 3P
CN702A,
CNB802
CN701, 4428595004 LW5267/LWB0640/2.5MM-04P CN 4P
CN802
D701-707, 2058304100 DIODE IN4148 1N 4148
D801-807
POWER B’D (4005185900)
FREQ VR B’D (4005185900)
INPUT B’D (4005185910)
VR 1/2 B’D (4005185920)
VR 3/4 B’D (4005185930)
POWER LED B’D (4005185940)
AMP B’D (4005186000)
MODEL QX-4960
≥ 100dB
0dB
20kΩ (Balance/Unbalance)
(Front) Power SW: Push up On/Push down Off
Attenuator: 21-position dB calibrated
(Rear) Mode Sw: Bridged/Stereo/Parallel
X-OVER SW
AC 110V–240V, 50/60Hz
770W
17kg
482(W) 88(H) 369(D) mm
Input Combination Jack (Balance)
Output 5-Way binding posts 4
Power Output Level
f=1kHz, THD+N ≤ 0.05% (Typical)
QUAD RL=8Ω
RL=4Ω
BRIDGED STEREO RL=8Ω
One Channel Driven
f=1kHz THD+N ≤ 0.05% RL=4Ω
Frequency Response RL=8Ω, P.=1W
Power Bandwidth Half Power, THD+N ≤ 0.1%
STEREO RL=8Ω
Total Harmonic Distortion (THD+N)
f=20Hz~20kHz, Half Power
QUAD RL=8Ω
RL=4Ω
BRIDGED STEREO RL=8Ω
Channel Separation Half Power RL=8Ω,
f=1kHz, ATT. max. Input 600Ω shunt
Residual Noise (DIN Audio Filter)
Signal-to-Noise Ratio DIN Audio,
Input 600Ω Shunt
Sensitivity (ATT max.)
Rated Power into 4Ω 1kHz
Input Impedance (ATT max.)
Indicators
Protection
PC Limiter
Fan Circuit
Controls
Power Source
Power Consumption
Weight
Dimensions
Connectors
170W
240W
480W
240W
0dB+0.5, –1.5dB: f=DC~55kHz
10Hz~20kHz
≤ 0.05%
≤ 0.07%
≤ 0.07%
≥ 80dB
≤ –85dB: ATT min.
Power (Red)
Protection (Mute) 4(Red)
Clip 4(Orange)
Signal 4 (Green)
Power SW ON/OFF muting
Heatsink Temp ≥ 100°C (212°F)
RL=2Ω
-50°C (122°F)-60°C (140°F)
Low-Speed – Variable – Hi-Speed
* Specifications and design subject to change without notice for improvements.
ACTIVE CROSSOVER
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