SERVICE
MANUAL
Q U A D
AMPLIFIER
QD-4960
http://www.inter-m.com
MADE IN KOREA
NO: 9007979200
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
2 3
SPECIFICATIONS ELECTRICAL PARTS LIST
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
SW702, 4618999910 SW SS65010-0203-9H-FN SW
SW802
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
CN2, CN304,
4428595003 LW5267/LWB0640/2.5MM-03P CN 3P
CN306
CN201 4428595008 LW5267/LWB0640/2.5MM-08P CN 8P
CN202 4355923806 CONNECTOR WAFER 06P (J.ST) CN 6P
CN203A, 4355923804 CONNECTOR WAFER 04P (J.ST) CN 4P
CN203B
CN301 4428595006 LW5267/LWB0640/2.5MM-06P CN 6P
D111 2058100996 DIODE RECTIFIER LT1N4006 (4007) 1N 4006
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 7
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
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
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
POWER 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 QD-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
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.
TOP AND BOTTOM VIEW OF P.C. BOARD
54
D201-209, 2058304100 DIODE IN4148 1N 4148
D214,
D301-309,
D314
D210-211, 2058322100 DIODE 1SS145 ROHM ISS 145
D310-311
D212-213, 2058100110 DIODE PS2010 PYUNG CHANG PS 2010
D312-313
IC102 2118050410 IC TA7317P TOSHIBA TA 7317P
J201, J301 4408194903 PIN HEADER 3P PIN 3P
L201, L301 2648099940 COIL INDUCTOR 1.2UM 1.2uH
PO201, PO301
2438007994 POSISTOR PTH 59F04 BE 471TS BE471TS
PO303 2438007993 POSISTOR PTH 9M04 BE 222TS 2F BE222TS
PO304 2438007995 POSISTOR PTH 9M04 BH 471TS 2F BE471TS
Q101, 2008606108-T TR NPN KTC2240BL (KTC 3200BL) KTC 2240BL
Q204-205,
Q209,
Q304-305,
Q309
Q201, Q210, 2008206104-T TR PNP KTA 1268BL KTA 1268BL
Q217-218,
Q301, Q310,
Q317-318
Q202-203, 2008206106-T TR PNP KTA2400G KEC KTA 2400G
Q302-303
Q206, Q306 2008005999 TR PNP 2SA 1546 NEC 2SA 1546
Q207, Q307 2008405999 TR NPN 2SC4001 NEC 2SC 4001
Q208, Q308 2008400960 TR NPN 2SC 1567A-R MATSUSHITA 2SC 1567A
Q211, Q311 2028407990 TR NPN 2SC 3298A (Y), KTC4370A (Y) 2SC 3298A
Q212, Q312 2028107984 TR PNP 2SA 1306A (Y), KTA1659A (Y) 2SA 1306A
Q213, Q215, 2028427998 TR 2SC 3856 W/ACC 2SC 3856
Q313, Q315,
Q214, Q215, 2028117994 TR PNP 2SA 1492 W/ACC 2SA 1492
Q314, Q316
R110, R114 3009822973 RES CF 8.2K 1/5W J N 8.2K
R111, 3009104973 RES CF 100K 1/5W J N 100K
R352-353
R112, R202, 3009473973 RES CF 47K 1/5W J N 47K
R210-212,
R302,
R310-312
R113 3009682973 RES CF 6.8K 1/5W J N 6.8K
R115-116, 3009223973 RES CF 22K 1/5W J N 22K
R255-256,
R268, R271,
R273,
R365-366,
R368,
R371, R373
R201, R301 3009271973 RES CF 270 1/5W J N 270
R203, R303 3003120953 RES CF 1.2K 1/5W FN 1.2K 1%
R204, 3009561973 RES CF 560 1/5W J N 560
R208-209,
R304,
R308-309
R205, R305 3009123973 RES CF 12K 1/5W J N 12K
R206, R306, 3009102973 RES CF 1K 1/5W J N 1K
R623
R207, R307 3009121973 RES CF 120 1/5W J N 120
R213, R313 3009100973 RES CF 10 1/5W J N 10
R214-215, 3089820275 RES NFR 82 1/4W J R PHILKO FR 82
R314-315
R216, R316 3009182973 RES CF 1.8K 1/5W J N 1.8K
R217, R317 3009471973 RES CF 470 1/5W J N 470
R218-219, 3002220953 RES CF 22K 1/5W F N 22K 1%
R318-319
R220-221, 3089100275 RES NFR 10 1/4W J R PHILKO FR 10
R320-321
R222-223, 3089221275 RES NFR 220 1/4W J R PHILKO FR 220
R226-229,
R322-323,
R326-329
R224-225, 3009333973 RES CF 33K 1/5W J N 33K
R324-325
R230-231, 3089332275 RES NFR 3.3K 1/4W J R PHILKO FR 3.3K
R330-331
Ref No. Part No. ValueDescription
R232-233, 3089479275 RES NFR 4.7 1/4W J R PHILKO FR 4.7
R238-239,
R332-333,
R338-339
R234-235, 3079101275 RES ERD-2FCVG 101T 1/4W R FR 100
R240-241,
R334-335,
R340-341
R236-237, 3049478783 RES CE 0.47 5W J T HAN NAE 0.47 5W
R242-243,
R336-337,
R342-343
R250, R350 3039479575-T RES MO 4.7 2W J RADIAL 4.7/2W
R251, R351 3039100575-T RES MO 10 2W JR 10 2W
R258, R358 3009224973 RES CF 220K 1/5W J N 220K
R269, R369 3009103973 RES CF 10K 1/5W J N 10K
R270, R272, 3009221973 RES CF 220 1/5W J N 220
R370, R372
R275, R357 3009683973 RES CF 68K 1/5W J N 68K
R354 3009184973 RES CF 180K 1/5W J N 180K
RL201 5528009950 RELAY CR 323 DC24V CR323
SP1-4 4438090210 TERMINAL BINDING POST 2P BINDING POST
VR201, 3248347110 RES SEMI RH 470 SIDE ADJ 470B
VR301
Ref No. Part No. ValueDescription
WIRING DIAGRAM
6 7
8
BLOCK DIAGRAM
9 10
SCHEHATIC DIAGRAM
11 12
13 14
S1
20
1
S5
6
27
26
28
9
S11
8
11
2
3
S3
S4
S3
16
15
4
14
17
S2
8309100013
8209110013
056335999520
4448997410
5568224533
7502090910
2058100998
6505936710
2828063210
4308997310
8545084520
6503973410
6505955520
046505939911
6538999110
7308999010
6705998410
6705998310
6505939810
4625996611
8545993390
6505940010
046121678021
048543985811
046122095910
046121678011
048601992413
048603995220
046505968210
PANEL FRONT
CHASSIS MAIN
TOP COVER
2
NO.
1
4
PART NAME PART NUMBER
22
23
24
S5
S8
BKT GND18
FAN BKT
SPACER
FAN COVER
BKT (REAR)
SPACER HOLDER
DIODE
BKT (HANDLE)
KNOB CONTROL
LED LIMITS
BKT (HEAT SINK)
POWER SW
HANDLE
11
8
6
5
7
9
10
13
12
14
16
1517FAN
POWER TRANS
AC INLET
CIRCUIT BREAKER
KNOB CONTROL
KNOB SLIDE19
20
22
23
25
QX-4960
QD-4960
1
Q'TY
1
1
2
1
REMARK
PART NAME PART NUMBER Q'TY REMARK
2
1
1
2
2
4
4
1
4
4
4
2
2
2
4
1
2
1
1
1
1
4
1
1
8095996930
8095996720
8095996520
8095997010
8095997110
8109340083
8009140083
8109330063
8009130064
25
NO.
WASHER SPRING
NUT M10B
FOOT&FOOT FELT
27
26
28
DOT SCREW BM 3X8B
SCREW 3BTC 4X18Y
SCREW BM 4X8B
SCREW 3BTC 4X8B
ASS'Y PM 4X18B
DOT SCREW 2BTC 3X10B
ASS'Y PM 4X16N
HEX MSPM 3X12Y
ASS'Y PM3X22B
SCREW 3BTC 3X6B
SCREW BM 3X6N
S3
S1
S2
S4
S5
S6
S10
S8
S7
S9
S11
8109340181
8099130121
4
5
12
8
16
4
1
8
13
32
2
10
13
12
S7
S6
3HEAT SINK
5
7
18
19
21 BKT SUPPORT
21
24 AC CORD
048601992414
QX-4960
QD-4960
8545084520 2
QX-4960
QD-4960
QD-4960 REMOVE
EXPLODED VIEW OF CABINET & CHASSIS/MECHANICAL PARTS LIST
15 16
ASS’Y DRAWING
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