Technics-RSEH-760-Service-Manual电路原理图.pdf
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1、RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 N Deck 1 cassette holder open button ( OPEN) O Deck 1 cassette holder P Fast forward/rewind buttons (6, 5) Q Deck 2 cassette holder R Deck 2 cassette holder open button ( OPEN) S Counter reset, display buttons (COUNTER, RESET, DISPLAY) T Deck 1/deck 2
2、select button (DECK 1/2) U Playback buttons and indicators (, !) The color of the indicators depends on the operation taking place. If stopped, fast forwarding or rewinding: orange If playing or recording: green While carrying out TPS or recording is on standby: flashes V Stop button (?) W Dolby noi
3、se reduction button (DOLBY NR) X Reverse mode button (REV MODE) Y Tape edit button (TAPE EDIT) Z Record pause button (? REC PAUSE) COUNTER RESETDISPLAY DECK 1/2 0OPEN0OPEN DOLBY NR 7 ?1 REV MODE TAPE EDIT HREC PAUSE TWXZYUVS POQRN CXA1552M-T4 IC201 DOLBY B NR REC EQ 8765 4 3 21 R101, C115 (R102, C11
4、6) Q103 (Q104) 11 42 (43) 41 (44) 40 (45) 39 (46) 29 (8) REC EQ AMP 35363444812 1516 17 18 24 25 26 27 LATCH SHIFT REGISTER REC EQ CONT. P.B. EQ CONT. AGC 38 (47) 31 (6) 30 (7) 22212019 32 (5) 12 15 R/P 5124 +B1 2 +B1 +B1 VR102(VR103) PLAYBACK GAIN ADJ. (DECK2) DECK2 R/P HEAD +B1 Q101 (Q102) ATT2 AT
5、T1 ATT3 SCDET ON/OFF CXA1998BQT6 IC101 R/P EQ AMP BA7755AF IC103 R/P SELECT Q107 Q303,304 BIAS OSC D301 DECK2 ERASE HEAD +B1 L301 Q301,305,306 BIAS OSC control (CrO2/ METAL) Q302 TP301TP302 Q105 (Q106) AMS 23 +B3 RFS MUTE 3 DECK1 PLAYBACK HEAD +B1 7 14 MC14066BFEL IC102 DECK 1/2 SELECT VR104(VR101)
6、PLAYBACK GAIN ADJ. (DECK1) 1 (11) 4 (8) 13 (12) 2 (10) 5 (6) 3 (9) 3 (14) 1 (16) 6 (11) 7 (10) 8 (9) Q202 ENC/DEC select Q201 Dolby ON/OFF S953(CrO2,DECK1) S973(CrO2,DECK2) S976(METAL,DECK2) S951(MODE) S952(HALF) Solenid drive D951 SOLENOID Q807,809 CAPSTAN MOTOR (DECK1) VR801 (TAPE SPEED ADJ.)M Cap
7、stan motor drive Q803,805 +B2 D101 D102 DOLBY L(R)ch +B3 +B3 0N2180RLC1 IC951/952 PHOTO INTERRUPTER Notes Signal line: Playback signal line : Recording signal line () indicates pin No. Right channel. TPS 25 S975(F. REC. INH.) S971(MODE) AD SW 3 4 5 Z971 LADDER RESISTOR +B3 2 1 7 39 M38503M2400F IC70
8、1 MICRO COMPUTER 18 RESET 26 A DATA 27 A CLK A LATCH 28 Reset signal generator Q706, D705 +B3 SYNC1 8 CN601 2 3 4 5 6 7 9 12 CS +B(10V) D.GND SCLK DATA 11 10 DECK REQ NC TAPE Rch OUT RS A.GND13 14 15 16 17 18 R CH CLK 10 8 REQ Interface Q701 7 HALT CS 9 +B3 TAPE Lch OUT TAPE Rch IN TAPE Lch IN R CH
9、DATA IN DATA OUT 12 11 Q702,703 Interface TP604 Q604,D606 Regulator D710 20 19 X OUT X IN X701 (8MHz) AVss Vss 15,21 3 31 32 DOLBY ON/OFF ENC/DEC CRO2 1 22 METAL 2 14 MODE 23 HALF1 24 6 M1 S972(HALF) S974(R. REC. INH.) 6 Solenid drive D971SOLENOID Q808,810 CAPSTAN MOTOR (DECK2) VR803 (TAPE SPEED ADJ
10、.)M Capstan motor drive Q804,806 +B2 M2 30 PL2 29 MC2 40 MC1 41 KEY2 41 KEY SWITCH (S900,901,903907, 909915) KEY1 42 To CD CHANGER,CD PLAYER BLOCK DIAGRAM To SOUND PROCESSOR BLOCK DIAGRAM NC NC A.GND NC NC +B2 TP609 VREF +B3Vcc 2 1 D707 5 PL1 CRO2 2 13 LED drive LED drive +B3 Q903,904 D905,907 () Q9
11、01,902 16 FWD LED 17 REV LED 37 LED CNT PHOTO2 T 3840 PHOTO1 T 19 20 NC NC +B1 Regulator Q602, D651,652 Rch IN Lch IN Rch OUT Lch OUT 0N2180RLC1 IC971/972 PHOTO INTERRUPTER (D.GND) A.GND +10V +B1 7 14MC14066BFEL IC202 SIGNAL CONT. 10 (8) 12 (6) 11 (9) Q108 4 LMT AMAIN P.C.B. DEARTH TERMINAL P.C.B. E
12、OPERATION P.C.B. W601 W601 CP102CP101 DECK 2 R/P HEAD, ERASE HEAD DECK 1 PLAYBACK HEAD CP305 CAPSTAN MOTOR DECK 2 CP306 CAPSTAN MOTOR DECK 1 To CD CHANGER, CD PLAYER & SOUND PROCESSOR CP902CP901 CMECHANISM P.C.B. (DECK 2)BMECHANISM P.C.B. (DECK 1) FW901 CN901 BLACK 1 . . . 5 2 4 1 . 5 1 . . . 5 2 4
13、1 . 5 1. . 4 1. . 4 1 . . . . . . . 91 . . . . . . . 9 1 . . . . . . 8 1 . . . . . . 8 CS951 1 . . . . . . . 9 CS971 1 . . . . . . . 9 3 6 4 MAIN CIRCUITA B A C B A CP101 1 2 3 4 5 CP102 1 2 3 4 5 IC103 BA7755AF R/P SELECT 124 678 3 5 47K 47K 47K 47K Q301 2SD1819ARTX BIAS OSC CONT. Q306 DTC144EUT106
14、 BIAS OSC CONT. Q305 DTC144EUT106 BIAS OSC CONT. Q302 2SD1328STXRA SWITCHING (REC:ON) Q303,304 2SD1450RSTA BIAS OSC Q303 Q304 Q102 2SJ164RTA HEAD SELECT (REC:ON) Q106 Q103,104 2SJ164QTA HEAD SELECT (PLAY:ON) Q104 Q103 Q105,106 2SD1819ARTX MUTING Q105 Q101 2SJ164RTA HEAD SELECT (REC:ON) S G D S G D D
15、 G S D G S L301 IC101 CXA1998BQT6 R/P EQ AMP 1 25 Lch Rch PLAYBACK HEAD DECK1 Lch ERASE HEAD DECK2 Rch R/P HEAD R106 330K C102 680P C101 680P R105 330K C143 470P C115 470P R101 5.6K R103 100K C150 10V100 C123 25V4.7 R119 22 R118 22 C130 16V100 C119 50V1 C140 16V10 C131 470P C129 10V22 R117 1K C117 3
16、30P R111 82 R113 12K C111 6.3V47 R109 1K C109 0.018 R141 100 R142 100 R144 100 C144 470P C104 680P C110 0.018 C112 6.3V47 R112 82 R114 27K R110 1K C114 50V2.2 C113 50V2.2 R102 5.6K R104 100K C116 470P C125 3300P C126 3300P C118 330P R154 2.7K C120 50V1 R13333K R1304.7M C1396.3V47 C12425V4.7 R132 27K
17、 C301 16V470 C303 6800P C302 100V2.2 N R313 1 TP302TP301 R302 1.8K R301 10K D301 MA111TX C305 50V0.1 C304 16V100 R303 2.2K R304 15K R305 18K R306 33K R138 4.7K R137 2.2K C309 6.3V47 R308 1K C311 0.01 C310 0.01 C308 3300P R307 1/2W2.2 C323 1000P C307 1000P R309 4.7K R310 4.7K R311 4.7K L302 100 H R13
18、4 3.9K R135 6.8K D102 MA111TX D101 MA111TX R15822K R127 4.7K R125 100K C138 0.047 C137 50V0.1 C13550V1 C13650V1 R120 100K C132 470P R153 2.7K R157 22K C103 680P R143 100 R107 10K R131 330K R108 10K LATCHES SHIFT REGISTERS PBEQ CTL AGC AMSRECEQ 20K20K 10K MUTE 40K AGC GAIN 210K 210K 210K 210K IREF 40
19、K AGC GAIN 10K RECEQ RFS 123456789101112 13 23 2437 38 39 40 41 42 43 44 45 46 47 48 20K20K 252627282930313233343536 REQEQ CTL 22 21 20 19 18 17 16 15 14 C306 0.039 R136 2.2K 9.6V :POSITIVE VOLTAGE LINE : PLAYBACK SIGNAL LINE : RECORDING SIGNAL LINE 9.6V 0V0V (0.2V) 9V 0V0V 0V0V (8.9V) 0V (0.7V) 0V
20、0V 0V 0V (0.7V) 0V (8.9V) (0.2V) 9V 0V0V 6V 9.6V0V 0V (9.5V) 0V (0.7V) 0V 0V (0.6V) 0V 0V (0.6V) 0V (0.7V) 0V (0.8V) 0V (0.6V) 0V 9.5V 9.5V (0.6V) 0V 0V (0.1V) (0.1V) 0V ERASE CURRENT CHECK POINT 5V0V4.5V4.5V4.5V4.5V4.5V8.6V5V0V (1.6V) 0V (0.2V) 5V 5V (9.6V) 0.1V (0.1V) 9.6V (0.2V) 9.6V (0.2V) 5V (5
21、V) 0.2V 4.5V9V9V4.5V4.5V4.5V4.5V0V5V0V 1.2V 2.6V 2.6V 1.3V 0V 0V 0V 0V 1.3V 2.6V 2.6V 1.2V DOLBY Rch F D E CNRMO B A IC201 CXA1552M-T4 DOLBY B NR 123458 912131415 ATT2 ATT2 ATT3 ATT3 ATT1 ATT1 SCDET SCDET 67 101116 ON/OFF R/P B A J I A B A B IC102 MC14066BFEL DECK 1/2 SELECT 1234567 891011121314 4.7
22、K 4.7K Q107 DTA143EUT106 R/P SELECT 4.7K 4.7K 4.7K 4.7K Q202 DTA143EUT106 ENC/DEC SELECT Q201 DTA143EUT106 DOLBY ON/OFF R209 1K R725 2.2K R730 2.2K R726 2.2K C134 470P C133 470P C142 0.1 C203 25V4.7 R211 10K C207 270P L201 R218 2.2K R217 2.2K C211 1500P C220 10V470 C219 16V100 C241 0.01 R237 22 R220
23、 22 C239 680P C205 50V1 R221 100 R230 1K R223 10K C223 25V4.7 C221 50V0.68 R213 3K R215 12K C213 25V4.7 C225 25V4.7 C217 50V0.1 R222 100 R219 18K C206 50V1 C240 680P C212 1500P R212 10K R210 1K C204 25V4.7 C208 270P L202 C214 25V4.7 R216 12K C226 25V4.7 R224 10K R231 1K R151 100K R140 47K R152 100K
24、R139 47K C141 50V1 R148 5.6K VR102 20K(B) R150 5.6K VR104 20K(B) R214 3K C222 50V0.68 R149 5.6K VR103 20K(B) R147 5.6K VR101 20K(B) C218 50V0.1 DOLBY Lch C R122 10K R121 10K :POSITIVE VOLTAGE LINE : PLAYBACK SIGNAL LINE : RECORDING SIGNAL LINE 5V 5V 9.6V 9.6V (0.2V) 9.6V 0V (9.5V) 4.8V9.6V4.7V4.7V4.
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