Bgw_gta_amplifier 电路图 维修原理图.pdf

收音机爱好者资料库 Ra d i o Fa n s .CN 收音机爱好者资料库 Ra d i o Fa n s .CN 收音机爱好者资料库 Ra d i o Fa n s .CN 215 R174 215 R173 0.1uF/50V C116 R183 10K 4148 D108 4148 D107 1N5257B D110 1N751A D118 1N751A D117 0RR116 R122 47.5K 20P C109 47.5K R120 20P C107 1.54K R121 47uF/50V C108 0.1uF C120 47K R104 47K R105 1uF/50V C103 500R R106 B C A L101 1.8uH 2.7R/2W R177 47K R179 47uF/50VC129 Q140 BS08D 1K R180 Q141 MAC223 D116 BYV26CD115 BYV26C R168 2R R164 2R R160 2R R156 2R R152 2R R148 2R Q136 2SA1987-O Q134 2SA1987-O Q132 2SA1987-O Q130 2SA1987-O Q128 2SA1987-O Q126 2SA1987-O R170 0.33R/5W R169 0.33R/5W 0.33R/5W R145 R149 0.33R/5W R153 0.33R/5W R157 0.33R/5W R161 0.33R/5W R165 0.33R/5W R146 0.33R/5W R150 0.33R/5W R154 0.33R/5W R158 0.33R/5W R162 0.33R/5W R166 0.33R/5W Q138 2N4403 Q1392N4401 0.1uF C121 4148 D113 4148 D114 100RR139100RR140 10R/2W R141 10R/2W R142 4148 D111 100R R137 Q121 MJE340 4148 D112 100R R138 Q120 MJE350 620P/300V C118 620P/300V C119 Q123 2SC5359-O 215 R171 Q125 2SC5359-O 2R R143 Q122 2SA1987-O Q124 2SA1987-O R144 2R 215 R172 R147 2R Q127 2SC5359-O R151 2R Q129 2SC5359-O R155 2R Q131 2SC5359-O R159 2R Q133 2SC5359-O R163 2R Q135 2SC5359-O R167 2R Q137 2SC5359-O 12K 1/2W R175 12K 1/2W R176 C1140.1uF Q117MJE180 10K R135 R136 C115 430P R134 1K Q119 MJE340 24.9R R133 Q115 MJE350 10K/0.5W R181 10K/0.5W R182 24.9R R129 24.9R R128 10R R131 10uF/50V C113 Q116 MJE350 Q114 MJE350 Q118 MJE340 24.9R R132 Q113 A93 Q107 A93 1K R125 1K R126 100R R130 Q112 A13 Q108 A93 100K R24 100K R123 Q105A93 Q106A93 10K R127 Q104 A43 Q103 A43 R117 10.0K R118 10.0K 430P C104 180R R119 Q102Q101 1uF/50V C110 4148D101 4148D102 1K R115 24.9R R114 24.9R R113 10K/0.5W R107 47uF/50V C105 1N4752 D10347K R102 1K R103 240P C102 C101 2.2uF/50V 1M R101 J101-4 J101-3 J101-2 J102 4148 D104 4148 D105D106 1N4752 47uF/50V C106 1.54K R109 Q110 A43 B C A Q109 A43 10uF/50V C117 22K R110 Q111 A93 1K R111 1K R112 4148 D109 SW102 90 DEG J101-5 10K/0.5W R108 0.1uF/100V C112 0.1uF/100V C111 0.1uF/100V C125 22uF/100V C127 J101-8 J101-1 J101-11 0.047uF/100V C128 2.7R/2W R178 0.1uF/100V C124 22uF/100V C126 J101-7 J101-6 J101-10 J101-9 (6) OUTPUT TRANSISTORS 2SC5359-O / 2SA1983-O CAN BE SUBSTITUTED BY MJL21194 / MJL21193 RESPECTIVELY. (5) DC OPERATING VOLTAGES ARE REFERENCED TO GROUND. (4) ALL RESISTORS 1/4W EXCEPT AS NOTED. (3) DC OFFSET CKT. FACTORY OPTION. (2) R136 FACTORY SELECTED FOR 400mV ACROSS R141 OR R142. (1) FOR OPTION, POWER XSTR CAN BE 2SC3858/2SA1494 BUT C118, C119 WILL BE 430PF, AND C107,C109 WILL BE 30PF. 5. ADD R183 OF 10K 1/4W IN DELAY TURN ON CIRCUIT. B 8. DELET C122, C123 OF 2.2uF 50V NP CAPS, INSERT TWO JUMPERS TO REPLACE THEM. 33V NP 9600-8760 HEATSINK/AMP SCHEMATIC MODEL GTA +34V (+10V) TURN ON DC VOLTAGE MING SHU -34V 33V NP * 11 UNLESS OTHERWISE SPECIFIEDNOTE: -86V +86V DC OFFSET ADJ. JP103 JP104 2SC3381 CLIP LIGHT DRIVE 33V JP105 NP 7-8-02 GTA - B.S01 REVISION B 7-8-02 1. ADD D117, D118 OF 1N751A IN FEED-BACK NEYWORK. 2. CHANGE INPUT CAP C101 FROM 47uF TO 2.2uF. 3. CHANGE C129 FROM 10uF/50V TO 47uF/50V. 4. CHANGE D110 FROM 1N4752 TO 1N5257B. 6. CHANGE PROTECTION CIRCUIT R127, R172 FROM 2K TO 215 OHM. 7. CHANGE PROTECTION CIRCUIT R173, R174 FROM 1K TO 215 OHM. 9. CHANGE C121, C122 FROM 5nF TO 0.1uF. ABCDEF 4 3 2 1 FEDCBA 1 2 3 4 C RevNumber Title Size Date FilenameSheetof Drawn by This page intentionally left blank. 2 2 30 470nF FILM 470nF FILM 470nF FILM 470nF FILM 8.06K 8.06K 16.2K 16.2K MC33078 MC33078 9600-0762 B STEREO STEREO DUAL MONO BRIDGE MONO MODE SWITCHES MC 33078 REMOVING THE X CROSSED JUMPERS ON PCB AND RESTORING THE CUT TRACES, 4 PLCS. ONLY XLRS AFFECTED. CHANNEL A OUTCHANNEL B OUT This page intentionally left blank. 9600-8111 This page intentionally left blank.