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SERVICE MANUAL
P U B L I C A D D R E S S
AMPLIFIER
A-60/120
www.inter-m.com
MADE IN KOREA
NO: 9007985000
ELECTRICAL ADJUSTMENT PROCEDURE
AMP SECTION
1. OFF SET VOLTAGE A. Setting Set the master volume control minimum. B. Connection
IDLE VR10
OFFSET MAIN PCB (4005181100) CHASSIS
VOLT METER
C. Adjustment Control OFFSET until voltmeter is the "0" position. (at Output Terminal) 2. IDLE CURRENT A. Setting Set the master volume control minimum. B. Connection
R56 R57
R58 R59 VOLT METER
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
IDLE VR11 MAIN B'D (4005181100)
C. Adjustment A-60: Adjust VR11 so that the current through the R56 and R58 become 10 milliampere. When that voltage is 10 millivolt, the current becomes 10 milliampere. A-120: Adjust VR11 so that the current through the R56 and R58 become 5 milliampere. When that voltage is 5 millivolt, the current becomes 10 milliampere.
1
SPECIFICATIONS
ELECTRICAL · Rated Output/Impedance ..........................................................A-60: 15.5V/4, 70V/81.6, 100V/166.7 ....................................................................................................A-120: 21.9V/4, 70V/40.8, 100V/83.3 · Input Sensitivity/Impedance MIC 1-3............................................................................................................................ -60dB/600, BAL Aux 1 .......................................................................................................................... -10dB/10k, UNBAL Aux 2 ........................................................................................................................... +3dB/10k, UNBAL · Frequency Response (±3dB)...................................................................................................80Hz~16kHz · T.H.D.......................................................................................................................................Less than 1% · S/N MIC ....................................................................................................................................Better than 50dB Aux.....................................................................................................................................Better than 75dB · Tone Control HIGH (10kHz).....................................................................................................................................±12dB LOW (100Hz) .....................................................................................................................................±12dB GENERAL · Power Source .......................................................................................................AC 100V240V, 50/60Hz · Power Consumption ....................................................................................................................A-60: 75W ...................................................................................................................................................A-120: 105W · Weight........................................................................................................................................A-60: 8.9kg .................................................................................................................................................A-120: 10.3kg · Dimensions......................................................................................................420(W) 88(H) 320(D)mm *Specifications and design subject to change without notice for improvements.
ELECTRICAL PARTS LIST
Ref No. Part No. Description Value Ref No.
C72-74 C81 C117-118 C137-138 C149-150 C152 C159 C78 C112-113 C123-124 C132-133 C202-205 C67 C69-70 C111 C1 C68 C107-108 C66 C157 C300-301 C303-304 C156 C158 C65 C101-102(A60) C101-102(A120) FB101-106 IDLE1-3 WAF9 WAF5 WAF7-8 WAF4 WAF3 WAF1-2 AUX1-2 MIC1-3 F101-102 RLY1 IC103-105 R109-110 R123-124 R135-136 R184 R113-114 R119-120 R105-106 R103-104 R111-112 R117-118 R127 R132 R146 R185-186 R128 R139 R107 R108 R115 R121 R116 R122 R188 R125-126 R130-131 R137 R138 R141 R190 R193 R143 R142 R129 R134 R191 R133 R140 R145 R144 R192 R147 R189 C110 C121-122 C130 C141 C146 C131 C143 C148 C114 C125 C134 C126 C127 C135-136
Part No.
3409247071-T
Description
CAP AF RSG 47UF 50V 6 P
Value
47/50
MAIN B'D (4005181100)
Q16-17 Q18-19 Q21 Q106 Q22 Q12-15 Q20 Q100 Q101-103 Q8(A60) Q8-9(A120) Q11 Q6(A60) Q6-7(A120) Q10 D16-17 D100 D14 D15 D101-104 D10-13 D105-106 ZD109 IC111-112 IC8 IC101 IC102 TH1-2 R77 R71-72 R81 R69 R74-76 R93 R187 R68 R86-87 R88 R96 R98 R92 R65 R83 R66 R78-79 R97 R90 R99 R73 R70 R95 R80 R89 R91 R94 R100 R67 R62 R63 R60-61 R64 R101-102 R54(A60) R54(A120) R9(A60) R9(A120) R82(A60) R82(A120) R84-85(A60) R84-85(A120) R56-59(A60) R56-59(A120) VR9 VR10-11 C103-104 C75-76 C79 C105-106 C71 C119 C128 C139 C142 C144 C147 C151 C154-155 C80 C77 2008206998-T 2008407970-T 2008606104-T 2008606105-T 2008606108-T 2008606998-T 2008606998-T 2028107106 2028107118 2028107984 2028407109 2028407122 2028407990 2058010101 2058100103 2058100996 2058100996 2058304100 2058502120 2118030405 2118050410 2128611000 2128611100 2438209011 3009101973 3009102973 3009103973 3009104973 3009152973 3009153973 3009182973 3009203973 3009221973 3009224973 3009302973 3009333973 3009471973 3009473973 3009562973 3009563973 3009821973 3039103575-T 3039152575-T 3039203473-F 3039271575-T 3059100772 3009392973 3009152973 3009822973 3009562973 3009103973 3009133973 3009123973 3009203973 3049478783 3059278783 3228082210 3248347120-T 3408222261 3409210071-T 3409210141-T 3409210971-T TR PNP 2SA 965Y(KTA 1023Y) TR NPN KTC 2SC 2235Y(KTC1027Y) TR NPN KTC 3198Y TR PNP KTA 1266Y TR NPN KTC2240BL (KTC 3200BL) TR NPN KTD 1302 KEC ONLY TR NPN KTD 1302 KEC ONLY TR PNP 2SB688(O)/2SA1940 TR PNP 2SA1943 TOSHIBA TR PNP 2SA 1306A(Y),KTA1659A(Y TR NPN 2SC5197 TOSHIBA TR NPN 2SC5200 TOSHIBA TR NPN 2SC 3298A(Y),KTC4370A(Y DIODE IN 60 DIODE KBPC-2504(SB256)LUG TYPE DIODE RECTIFIER LT1N4006(4007) DIODE RECTIFIER LT1N4006(4007) DIODE IN4148M DIODE ZENER UZ-12BM(1N5242B) IC KEC KIA 6966S IC TA7317P TOSHIBA IC KA7818 COMMON IC KA7918 COMMON THERMISTOR YSG-503J L=100MM RES CF 100 1/5W J N RES CF 1K 1/5W J N RES CF 10K 1/5W J N RES CF 100K 1/5W J N RES CF 1.5K 1/5W J N RES CF 15K 1/5W J N RES CF 1.8K 1/5W J N RES CF 20K 1/5W J N RES CF 220 1/5W J N RES CF 220K 1/5W J N RES CF 3K 1/5W J N RES CF 33K 1/5W J N RES CF 470 1/5W J N RES CF 47K 1/5W J N RES CF 5.6K 1/5W J N RES CF 56K 1/5W J N RES CF 820 1/5W J N RES MO 10K 2W JR RES MO 1.5K 2W J RADIAL RES MO 20K 1W JN RES MO 270 2W J RADIAL RES CE 10 5W JN RES CF 3.9K 1/5W J N RES CF 1.5K 1/5W J N RES CF 8.2K 1/5W J N RES CF 5.6K 1/5W J N RES CF 10K 1/5W J N RES CF 13K 1/5W J N RES CF 12K 1/5W J N RES CF 20K 1/5W J N RES CE 0.47 5W J T HAN NAE RES CE 0.27 5W J T VR RK09K111083MA SES SEMI RH0638C100471 CAP RSA 2200UF 35V SNAP 18 P CAP AF RSG 10UF 50V 5 P CAP AF RSG 100UF 25V 6 P CAP AF RSG 1UF 50V 5 P 2SA 965Y 2SC 2235Y KTC 3198Y KTA 1266Y KTC 2240BL KTD1302 KTD 1302 2SB 688 2SA1943 KTA 1659A 2SD 718 2SC5200 KTC 4370A 1N 60 KBPC2504 1N 4006 1N4006 1N 4148 UZ-12BM KIA6966S TA 7317P 7818 7918 50K 100 1K 10K 100K 1.5K 15K 1.8K 20K 220 220K 3K 33K 470 47K 5.6K 56K 820 10K 2W 1.5K 2W 20K 1W 270 2W 10/5W 3.9K 1.5K 8.2K 5.6K 10K 13K 12K 20K 0.47/5W 0.27/5W 10KB 470B 2200/35 10/50 100/25 1/50
3409247871-T 3409247971-T
CAP AF RSG 0.47UF 50V 5 P CAP AF RSG 4.7UF 50V 5 P
0.47/50 4.7/50
3509101130-T 3509102530-T 3509103530-T 3509104530-T 3509470130-T 3609103120-T 3609104120-T
CAP CE SL 100PF 50V J CAP CE B 0.001UF 50V J CAP CE F 0.01UF 50V Z CAP CE F 0.1UF 50V Z CAP CE SL 47PF 50V J CAP MA 0.01UF 100V CAP MA 0.1UF 100V J
100P 0.001/50 0.01/50 0.1/50 47P 0.01/100(M) 0.1/100(M)
3609182120-T 3419533279 3419510379 3908609990 4355469103 4428595003 4428595004 4428595005 4428595005 4428596602 4428596603 4438095210 4438097310 5508411934 5528008200 S21101080002 S30101017121
CAP MA 0.0018UF 100V J CAP LSW332M 1HO25M(3300UF/50V) CAP E LPW103HIJP63V-WGB3 JAMIC EMI FILTER 1000PF WIRE JUMPER LW5267/LWB0640/2.5MM-03P LW5267/LWB0640/2.5MM-04P LW5267/LWB0640/2.5MM-05P LW5267/LWB0640/2.5MM-05P WAFER LW-1143-02P LOCK WAFER LW-1143-03P JACK RCA 4P JACK PHONE 4P FUSE TS 20MM 630MA/250V U/C/S RELAY DH24D1-0 24V (DAIICHI) IC 2068 SOIC8 RES TF 100 1/16W 1608
0.0018/100(M) 3300/6.3 10000/50 EMI 1000P JUMPER LW-5267-03P LW-5267-04P LW-5267-05P LW-5267-05P LW-1143-02P LW-1143-03P RCA 4P PHONE 4P T630mA/250V HR-311 NJM 2068DD 100
S30101027121 RES TF 1K 1/16W 1608 S30101027121 RES TF 1K 1/16W 1608 S30101037121 RES TF 10K 1/16W 1608
1K 1K 10K
S30101047121 S30101137121 S30101237121 S30101247121 S30101847121
RES TF 100K 1/16W 1608 RES TF 11K 1/16W 1608 RES TF 12K 1/16W 1608 RES TF 120K 1/16W 1608 RES TF 180K 1/16W 1608
100K 11K 12K 120K 180K 20K 220 22K 220K 2.2M 330 33K 39K 4.7K 47K 56K 560K 82K 0.001/50
S30102037121 RES TF 20K 1/16W 1608 S30102217121 RES TF 220 1/16W 1608 S30102237121 S30102247121 S30102257121 S30103317121 S30103337121 S30103937121 S30104727121 S30104737121 S30105637121 S30105647121 S30108237121 S35101025321 RES TF 22K 1/16W 1608 RES TF 220K 1/16W 1608 RES TF 2.2M 1/16W 1608 RES TF 330 1/16W 1608 RES TF 33K 1/16W 1608 RES TF 39K 1/16W 1608 RES TF 4.7K 1/16W 1608 RES TF 47K 1/16W 1608 RES TF 56K 1/16W 1608 RES TF 560K 1/16W 1608 RES TF 82K 1/16W 1608 CAP CL 0.001UF 50V K 1608
3409222071-T 3409233071-T
CAP AF RSG 22UF 50V 5 P CAP AF RSG 33UF 50V 6 P
22/50 33/50
S35100504321 CAP CL 5PF 50V J 1608 S35101504321 CAP CL 15PF 50V J 1608 S35103304321 CAP CL 33PF 50V J 1608
5P 15P 33P
2
3
TOP AND BOTTOM VIEW OF P.C. BOARD
Ref No.
C153 C115 C116
Part No.
Description
47P 68P
Value
S35104704321 CAP CL 47PF 50V J 1608 S35106804321 CAP CL 68PF 50V J 1608
VOLUME B'D (4005181110)
VR6-7 VR1-5 VR8 C164 C167 C165 C168 C160 C172 C178 C162-163 C170-171 C173 C175-176 C174 CON9 CON7 CON8 IC106-107 R151-152 R158-159 R156 R157 R165 R200-205 R208-209 R210 R148 R153 R206-207 R150 R155 R149 R154 C161 C166 C177 C169 3228069180 3228069190 3409210071-T 3409210071-T 3409222071-T 3409233071-T 3409247071-T 3609102120-T 3609103120-T 3609152120-T 4355740621 4355743319 4355764012 RK09S11F010353B RK09S11B000313A CAP AF RSG 10UF 50V 5 P CAP AF RSG 10UF 50V 5 P CAP AF RSG 22UF 50V 5 P CAP AF RSG 33UF 50V 6 P CAP AF RSG 47UF 50V 6 P CAP MA 0.001UF 100V CAP MA 0.01UF 100V CAP MA 0.0015UF 100V J CON ASS Y 3P 510MM A-60/120 CON ASS Y 5P (450MM) A-60/120 CON ASS Y 5P (250MM) A-60/120 50KB 10KA 10/50 10/50 22/50 33/50 47/50 0.001/100(M) 0.01/100(M) 0.0015/100(M) CON ASS Y 3P (510MM) CON ASS Y 5P (450MM) CON ASS Y 5P (250MM) NJM 2068DD 100 1K 10K 1.2K 12K 13K 18K 2.7K 3.9K 470 47K 5P 10P 150P
S21101080002 IC 2068 SOIC8 S30101017121 RES TF 100 1/16W 1608 S30101027121 S30101037121 S30101227121 S30101237121 S30101337121 S30101837121 S30102727121 S30103927121 S30104717121 S30104737121 S35100504321 S35101004321 S35101514321 RES TF 1K 1/16W 1608 RES TF 10K 1/16W 1608 RES TF 1.2K 1/16W 1608 RES TF 12K 1/16W 1608 RES TF 13K 1/16W 1608 RES TF 18K 1/16W 1608 RES TF 2.7K 1/16W 1608 RES TF 3.9K 1/16W 1608 RES TF 470 1/16W 1608 RES TF 47K 1/16W 1608 CAP CL 5PF 50V J 1608 CAP CL 10PF 50V J 1608 CAP CL 150PF 50V J 1608
OUTPUT LED B'D (4005181120)
LD1 LD7-8 LD2-6 CON5 CON4 R1-8 2308684231 2308684271 4355740421 4355740521 LED REC KLR208 2*5 RED KEC LED REC KLG208 2*5 GRE KEC CON ASS Y 4P 510MM A-60/120 CON ASS Y 5P 510MM A-60/120 RED GREEN CON ASS Y 4P (510MM) CON ASS Y 5P (510MM) 680
S30106817121 RES TF 680 1/16W 1608
SP TERMINAL B'D (4005181130)
TER1 TER2 WAF6 4408193904 4408194004 4428596604 TERMINAL BLOCK(M) 4P TERMINAL BLOCK(F) 4P LOCK WAFER LW-1143-04P TERMINAL BLOCK(M)4P TERMINAL BLOCK(F)4P LW-1143-04P
POWER SW B'D (4005181140)
C100 WAF11 SW1 OPT1(A60) OPT1(A120) OPT1(A60UL) OPT1(A120UL) PT1(A60) 3549472407 4428596603 4648199920 2818086100 2818086200 2818085900 2818086000 2828060000 2828060010 2828060020 2828060030 2828059900 2828059910 2828059920 2828059930 5508112937 5508212730 5508412736 5508103337 5508112837 5508412836 CAP DE2E3KH472MA4B LOCK WAFER LW-1143-03P SW POWER SDD1PASL011 A-60/120 TRANS OUTPUT A-60 TRANS OUTPUT A-120 TRANS OUTPUT A-60(UL) TRANS OUTPUT A-120(UL) TRANS POWER 120V A-60 TRANS POWER 220V A-60 TRANS POWER 230V A-60 TRANS POWER 240V A-60 TRANS POWER 120V A-120 TRANS POWER 220V A-120 TRANS POWER 230V A-120 TRANS POWER 240V A-120 FUSE 51S 20MM 3A/250V K/U/C/J FUSE NB 20MM 2A/250V KS FUSE TS 20MM 2A/250V U/C/S/V FUSE 53S 20MM 5A/250V K/U/C/J FUSE51S 20MM 2.5A/250V K/U/C/J FUSE TS 20MM 2.5A/250V U/C/S/V 0.0047/400V LW-1143-03P POWER S/W O.P.T O.P.T O.P.T O.P.T 120V 220V 230V 240V 120V 220V 230V 240V 120V 220V 230V/240V 120V 220V 230V/240V
PT1(A120)
F100(A60)
F100(A120)
4
5
WIRING DIAGRAM
BLOCK DIAGRAM
6
7
SCHEMATIC DIAGRAM
8
9
EXPLODED VIEW OF CABINET & CHASSIS/MECHANICAL PARTS LIST
S3
A-60/120 EXPLODED VIEW DWG PARTS, LIST
N0 1 PARTS NAME FRONT PANEL INLAY KNOB CONTROL KNOB CONTROL KNOB PUSH VOLUME B'D OUTPUT LED B'D POWER SW B'D CHASSIS MAIN FOOT HEAT SINK HEAT SINK BKT MAIN B'D BRACKET PCB DIODE TRANS POWER TRANS OUTPUT BACK CHASSIS JACK NUT SP TERMINAL B'D TERMINAL BLOCK(F) STOPPER CORD CORD AC DOM 3 CORE TOP COVER PARTS NO 048521990611 048521990612 048573994111 048543998313 048543997011 8543998110 4005181110 4005181120 4005181140 6121674910 056335999520 7502088710 6505942010 4005181100 6505968010 2058100103 2828060010 2828059910 2818086100 2818086200 046102979011 046102979015 8525998410 4005181130 4408194004 6518999810 4308999710 046122089610 Q'TY 1 1 1 6 2 1 1 1 1 1 4 1 1 1 1 1 1 1 1 1 1 1 3 1 1 1 1 1 REMARK A-60 A-120
S6 S5
S1 14 18 19
2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
11 12 13 S2 9 S1 S4 S2 22 21 23 24
S1 14 20 S8 15 S7 S8
17 18 19 20 21 22 23 24
A-60 A-120 A-60 A-120 A-60 A-120
A-120(OPT)
S1 S2 S3 S4 S5 S6 S7 S8
SCREW #3BTC 3X6B SCREW #2BTC 3X8B SCREW #3BTC 4X8BK SCREW #2BTC 3X10B SCREW BM 3X6B HEX MSPW 3X16Y ASS'Y SCREW 3PTC 4X8B ASS'Y SCREW PM 4X18B
8109330063 8109230083 8109340083 8109230103 8009130063 8099130161 8095993410 8095996930
1 2 3 6 7
S2 S7
A-120(PT)
14 12 10 4 3 8 9 1
17 8 S3 10 16
4 5
S1
10
11
ASS'Y DRAWING
7
8
9
10
11
6
320
420
A-120 PUBLIC ADDRESS AMPLIFIER
88
MIC 1
MIC 2
MIC 3
AUX 1
AUX 2
BASS
TREBLE
MASTER
MIN
MAX
MIN
MAX
MIN
MAX
MIN
MAX
MIN
MAX
-12dB
+12dB -12dB
+12dB
MIN
MAX
5
4
3
2
12
~AC INPUT 230V 50Hz, 105W
MODEL: A-120
PUBLIC ADDRESS AMPLIFIER WARNING; TO REDUCE THE RISK OF ELECTRIC SHOCK.
DO NOT EXPOSE TUIS EQUIPMENT OR MOISTURE.
4 COM
70V(41 ) 100V (83 )
CAUTION;TO REDUCE THE RISK OF ELECTRIC SHOCK, DO NOT REMOVE COVER. NO USER SERVICEABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED SERVICE PERSONNEL. AVIS; RISQUE DE CHOC ELECTRIOUE NE PAS OUVRIR.
AUX 2
L
AUX 1
R
MIC 3
MIC 2
MIC 1
S/N
www.inter-m.com
RISK OF ELECTRIC SHOCK DO NOT OPEN
CAUTION
MADE IN KOREA
MIC1 MUTE
0
10
12
No. 1 2 3 4 5 6 7 8 9 10 11
+3 0 -3 -7
PROT
Description
FRONT PANEL SW POWER CONTROL KNOB CONTROL KNOB INLAY TOP COVER CONTROL KNOB PHONE JACK RCA JACK 4P SPEAKER TERMINAL AC CORD
Part No
048521990611 048521990612 048543997210 048543997011 048543998313 048573994111 046122089610 048543997011 4438097310 4438095210 4408193904 4308991710 046102979011 046102979012 046102979013 046102979014 046102979015 046102979016
Q'ty
1 1 1 2 6 1 1 1 3 1 1 1 1 1 1 1 1 1 1 1 A-60 A-60 A-60 A-60 A-60
Remark
A-120
220V 230V 120V 240V 220V 230V 120V 240V
-10 -14
POWER
12
BACK CHASSIS
A-120 A-120 A-120 A-120
ON
MAX
OFF
046102979017 046102979018
1
13
NOTE