For U.S.A.,Canada & Europe model SERVICE MANUAL MODEL Ver. 1 SYS-76HT SPEAKER SYSTEM PACK 注 意 サービスをおこなう前に、このサービスマニュアルを 必ずお読みください。本機は、火災、感電、けがなど に対する安全性を確保するために、さまざまな配慮を おこなっており、また法的には「電気用品安全法」に もとづき、所定の許可を得て製造されております。 従ってサービスをおこなう際は、これらの安全性が維 持されるよう、このサービスマニュアルに記載されて いる注意事項を必ずお守りください。 ● For purposes of improvement, specifications and design are subject to change without notice.
SYS-76HT SAFETY PRECAUTIONS The following check should be performed for the continued protection of the customer and service technician. LEAKAGE CURRENT CHECK Before returning the unit to the customer, make sure you make either (1) a leakage current check or (2) a line to chassis resistance check. If the leakage current exceeds 0.5 milliamps, or if the resistance from chassis to either side of the power cord is less than 460 kohms, the unit is defective.
0 -10 20 40 (dB) 0 -10 20 40 830mV 75mV (dB) LINE INPUT -1dB -1dB U201 +4.34dB +4.34dB HPF +20dB DIRECT MODE ATT CROSSOVER CONTROL +1.84dB VOL SW202 REVERSE DIRECT MODE SW NORMAL ALC U203 POWER AMP SPEAKER at 55Hz +27.2dB 20V/4ohrm THD 0.7% (ALCON) at 55Hz +50.5dB 20V/4ohrm THD 0.
DSW-76 Section DSW-76 SEMICONDUCTORS Only major IC's are shown,generai IC's etc. are omitted to list. 主な半導体を記載しています。汎用の半導体は記載を省略しています。 IC's TL074CN (U201-203) PRE-AMP P.W.B. UNIT Output 1 1 14 Output 4 Inverting Input 1 2 - - 13 Inverting Input 4 Non-inverting Input 1 3 + + 12 Non-inverting Input 4 11 VCC - VCC + 4 Non-inverting Input 2 5 + + 10 Non-inverting Input 3 Inverting Input 2 6 - - 9 Inverting Input 3 8 Output 3 Output 2 7 NJM4558D (U101) AMP P.W.B.
DSW-76 Section DSW-76 PRINTED WIRING BOARDS (1/2) AMP P.W.B.
DSW-76 Section DSW-76 PRINTED WIRING BOARDS (2/2) PRE-AMP P.W.B. UNIT POWER P.W.B.
SYS-76HT DSW-76 Section NOTE FOR PARTS LIST 部品表について • Part indicated with the mark "nsp" are not always in stock and possibly to take a long period of time for supplying, or in some case supplying of part may be refused. • When ordering of part, clearly indicate "1" and "I" (i) to avoid missupplying. • Ordering part without stating its part number can not be supplied. • Part indicated with the mark " ★ " is not illustrated in the exploded view.
DSW-76 Section SYS-76HT PARTS LIST OF P.W.B. UNIT ASS’Y ＊本表に記載されている部品は、補修用部品のため製品に使用している部品とは一部、形状、寸法などが異なる場合があります。 ＊ The parts listed below are for maintenance only, might differ from the parts used in the unit in appearances or dimensions. ＊ "nsp" 印の部品は常時在庫していませんので供給に長時間を要することがあります。場合によっては、供給をお断りする場合があります。 ＊ Part indicated with the mark “nsp” are not always in stock and possibly to take a long period of time for supplying, or in some case supplying of part may be refused.
DSW-76 Section Ref. No nsp Part No. C243 Part Name Remark SYS-76HT Q'ty New - ERECTRIC C 100UF/25V 135-3107m25-e C244,245 - FILM C 10NF/63V 129-a103j633-e C246 - ERECTRIC C 47U/25V 135-3476m25-e C247 - CERAMIC C 0.01U/50V 130-2b103k503-e C248 - ERECTRIC C 47U/25V 135-3476m25-e C249 - FILM C 0.
DSW-76 Section Ref. No nsp D103 Part No. 00D DSW 7601 042 Part Name Remark D 1N4148 197-031n4148-e 197-031n4148-e D105 00D DSW 7601 042 D 1N4148 D106,107 00D DSW 7601 050 ZD 6.
DSW-76 Section Ref. No nsp Part No. Part Name Remark SYS-76HT Q'ty New - TUBE 1M*10mm - SHEET 156-h010010-e 361-NYL-00054-0LAE * - TR BLACKET 361-FE-00051-0LAE * - HEAT SINK 323-AL-00020-0LAE * - M3*14 SCREW 351-AM03014A094-J - M3*8 SCREW 352-AM03008D040-J * POWER P.W.B. UNIT ASS'Y Ref. No nsp Part No. Part Name Remark Q'ty New SEMICONDUCTORS GROUP D301 00D DSW 7601 045 D 1/2W/12V 199-05001200j-e 00D DSW 7601 007 R 0.56K/2W 110-20561jk3-e - FILM C 0.
SYS-76HT DSW-76 Section DSW-76 EXPLODED VIEW WARNING: Parts marked with this symbol have critical characteristics. Use ONLY replacement parts recommended by the manufacturer.
DSW-76 Section SYS-76HT PARTS LIST OF EXPLODED VIEW ＊本表に記載されている部品は、補修用部品のため製品に使用している部品とは一部、形状、寸法などが異なる場合があります。 ＊ The parts listed below are for maintenance only, might differ from the parts used in the unit in appearances or dimensions. ＊ "nsp" 印の部品は常時在庫していませんので供給に長時間を要することがあります。場合によっては、供給をお断りする場合があります。 ＊ Part indicated with the mark “nsp” are not always in stock and possibly to take a long period of time for supplying, or in some case supplying of part may be refused.
DSW-76 Section Ref. No. nsp Part No.
SYS-76HT SC-C76/SC-A76 Section SC-C76 EXPLODED VIEW 7 6 4 102 3 7 1 101 8 5 101 3 2 SC-C76 PARTS LIST OF EXPLODED VIEW ※ ※ ※ ※ 本表に記載されている部品は、補修用部品のため製品に使用している部品とは一部、形状、寸法などが異なる場合があります。 The parts listed below are for maintenance only, might differ from the parts used in the unit in appearances or dimensions.
SYS-76HT SC-C76/SC-A76 Section SC-A76 EXPLODED VIEW 6 4 102 101 7 8 1 3 101 2 5 SC-A76 PARTS LIST OF EXPLODED VIEW ※ ※ ※ ※ 本表に記載されている部品は、補修用部品のため製品に使用している部品とは一部、形状、寸法などが異なる場合があります。 The parts listed below are for maintenance only, might differ from the parts used in the unit in appearances or dimensions.
SYS-76HT PACKING VIEW 209 210 211 212 225 202 205 213 208 204 201 207 213 213 218 219 220 221 206 203 224 213 222 223 217 PARTS LIST OF PACKING & ACCESSORIES ※ ※ ※ ※ 本表に記載されている部品は、補修用部品のため製品に使用している部品とは一部、形状、寸法などが異なる場合があります。 The parts listed below are for maintenance only, might differ from the parts used in the unit in appearances or dimensions.
POW ER AC 12VAC AC AC -12V STBY 12VAC PGND 12VAC PGND 12VAC AC-ST SIGNAL IN SIGNAL IN -12V STBY AC2 AC1 PGND LI MIT MUTE -15V AGND +15V PTC OUT LI MIT MUTE -15V AGND +15V PTC in AMP P.W.B. UNIT PGND PGND PRE AMP P.W.B. UNIT AC1 AC3 PGND AC4 AC2 POWER P.W.B.
DSW-76 Section NOTE FOR SCHEMATIC DIAGRAM SYS-76HT 配線図について WARNING: Parts marked with this symbol ! have critical characteristics. Use ONLY replacement parts recommended by the manufacturer. ! 印の部品は安全を維持するために重要な部品です。 従って交換時は必ず指定の部品を使用してください。 注） CAUTION: (1) 指定なき抵抗値は Ω、ｋ は ｋΩ、M は MΩ を示す。 Before returning the unit to the customer, make sure you make either (1) a leakage current check or (2) a line to chassis resistance check. If the leakage current exceeds 0.
DSW-76 Section SYS-76HT DSW-76 SCHEMATIC DIAGRAMS (1/2) 1 2 4 3 5 8 7 6 V R202 +15V 50KA C224 0.1u R245 * R2CA 1 C201 0.1u/5% D206 1N4148 -15V TL074 18K 4 C238 sw202 5 4 6 R218 R219 SW-4 4 5.1K R207 20K TL074 0.047u/5% C206 10u/16V /20% 20k C223 0.1u C204 10u/16V /20% 3 18k R205 R211 1 R248 20KB 10k R235 135K/1% 0.
DSW-76 Section SYS-76HT DSW-76 SCHEMATIC DIAGRAMS (2/2) 1 2 3 4 5 8 7 6 +23.4V -13.6V +48.5V A +0.1V B -48.5V -23.4V +23.8V E1 : 230V 50Hz E1C : 220V 50Hz E1T : 120V 60Hz C C301 -23.8V 0.01u/250V A C K1 +23.4V P303 +48.5V 2 12VDC RELAY 1 P301 1 2 1 2 2 1 P302 TF301 L N F301 A C10.5V GND A C10.5V STBY -V st C303 4.7n/250V A C -48.5V POWER INPUT: FUSE: F301 AC120V(60HZ) 1.25A 125VAC INPUT 120VAC AC230V (50HZ) 1.
SYS-76HT DOCUMENTS FOR WEEE Details of Recycle Parts ＊ You have to remove the parts that marked “WEEE Mark ◆ " when the recycling processing. (Europe model only) Recycle Parts for DSW-76 Ref. No.
SYS-76HT Recycle Parts for SC-C76 Ref. No. 1 2 2A 2B 3 4 5 6 7 8 101 102 WEEE Mark ◆ ◆ ◆ ◆ ◆ ◆ Part Name Material Cabinet Ass'y Tweeter Ass'y Cosmetic baffle Tweeter Woofer Crossover Ass'y Grille Ass'y Rear Sticker Wall Bracket Holder Screw 4X20 Screw 3.5X16 Complex Complex ABS Complex Complex Complex Complex PVC STEEL TPR STEEL STEEL Q'ty 1 1 2 1 1 1 2 4 12 8 Recycle Parts for SC-A76 Ref. No.
SYS-76HT Exploded view of DSW-76 You have to remove the parts that marked "WEEE mark " when the recycling processing.
SYS-76HT Exploded view ofSC-C76 7 6 4 102 2A 2B 3 7 1 3 101 8 5 101 You have to remove the parts that marked "WEEE mark " when the recycling processing. (Europe model only) 2 Exploded view of SC-A76 6 4 2A 2B 102 101 7 8 1 3 101 2 You have to remove the parts that marked "WEEE mark " when the recycling processing.
SYS-76HT Details of Recycle parts for Power transformer Part No.30 : MAIN TRANS No. 1 Material PA 2 COPPER WIRE 3 COPPER ALLOY 4 COPPER WIRE 5 COPPER ALLOY 6 COMPLEX 7 PET/PRESS BOARD 8 PET/PRESS BOARD 9 PA 10 ACETATE 11 STEEL 12 STEEL Part No.20 : SUB TRANS No.
