Technics-SAEH-760-Service-Manual电路原理图.pdf
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1、 Tuner amplifier 1 Standby/on switch (?/I) Press to switch the unit from on to standby mode or vice versa. In standby mode, the unit is still consuming a small amount of power. 2 Standby indicator (?) When the unit is connected to the AC mains supply, this indicator lights up in standby mode and goe
2、s out when the unit is turned on. 3 Play timer/record timer button and indicator (FPLAY/FREC) 4 ECO mode button (MODE) 5 Clock/timer, demo button (CLOCK/TIMER, DEMO) 6 FM mode button (FM AUTO/MONO) 7 6ch discrete input button (6CH DISCRETE INPUT) 8 Source input button (INPUT SELECTOR) 9 Tuner/band b
3、utton (TUNER/BAND) :Digital super woofer button and indicator (DIGITAL S.WOOFER) ; Volume control (VOLUME) Set button (SET) ? Tuning buttons (X, W TUNING) RDS display mode buttons (RDS, PSDISP MODEPTY) H H/IMODE ? TUNING PHONES TUNING MODESETKARAOKEECHO INPUT SELECTORTUNER/BAND DIGITAL S.WOOFER VOLU
4、ME UP DOWN FM AUTO/ MONO 6CH DISCRETE INPUT ?PLAY/?REC CLOCK/TIMER DEMO 5 67 8 9;:3 41 2 ? A A B l _ r 1 m o p q z y | : 9 t ; s n u v w x H AV EFFECT SLEEP CH SELECT PROGRAM 123 456 7890 j/-/- CANCEL DISC VCR/AUX/ 6CH INPUT TAPE/ DECK 1/2 UPRO LOGICDIGITAL S.WOOFER SUPER SURROUND TUNER/ BAND ?/g? M
5、UTINGMN ?VOLUME? CD TEST 3D AI EQ/M.EQ BAND EQ Remote controls Buttons 1, 9;, , _ and function in the same way as the controls on the main unit. l Sleep timer button (SLEEP) m Numbered buttons (19, 0, M) n Cursor buttons (2, 1, 3, 4) oChannel select button (CH SELECT) p Test button (TEST) q Input se
6、lect button (VCR/AUX/6CH INPUT) r TAPE select, deck 1/deck 2 select button (TAPE/DECK 1/2) s CD pause/Tape reverse playback button (2/;) t Muting button (MUTING) u Program button (PROGRAM) v Cancel button (CANCEL) wDisc button (DISC) x EQ button (EQ) y AV effect button (AV EFFECT) z CD button (CD) C
7、D play/tape forward playback button (1) | CD/tape stop button (?) CD skip/search, tape fast forward/rewind buttons (4, 5) B 1920212223 AM MIX 12 LEVEL DET FM IF S- CURVE 2 3 REG 4 13 AGC COMP 681110 AM RF AMP AM IF AM/FM IF BUFFER 24 1 FM DET AM OSC BUFEER ALC TUNING DRIVE 18 BUFFER AMP FM ANT RF AM
8、P FM MIXER FM OSC 9 Vcc +B(FM) FM IF AMP +B2 AM IFT 1 20 7.2MHz XIN XOUT PHASE DET CHARGE PUMP CE2 3 DI 4 CL D05 98710 BO4 BO3 IO1 15 VDD 16 PD IFIN 11 BO2 1/2 14 13 FM IN AM IN Power supply (FM:ON) +B2 +B1 +B(FM) SD STEREO SWITCH 17 FM / AM I F AMP, DET / AM OSC, MIX / FM MPX (LA1833MN) 15 PILOT CA
9、NCEL PHASE DET 16 VCOFFFF PILOT DET FF AM DET DECODER BO16 IO2 12 19 Vss Power ON RESET PLL FREQUENCY SYNTHESIZER (LC72131M) +B2 GND 5 7 ST MONO FM/AM SD FMDET FM IF IN AM OSC OUT AFC AM OSC AM RF IN AGC AM OUT DET OUT PILOT IN MPX IN PILOT OUT Lch 14 Rch 17 18 AIN AOUT AM ANT COIL AM OSC COIL AM AN
10、T +B2 STRQ AM IF IN AM MIX OUT Rch IFT +B(FM) +B(FM) +B(FM) FM:ON DET CE1 DATA1 CLK1 DATA IN Z120 TUNER UNIT (RAN0005EM) REFERENCE DIVIDER SWALLOW COUNTER 1/6,1/17 4BIT 12 BIT PROGRAMMABLE DIVIDER DATA SHIFT REGISTER LATCH UNIVERSAL COUNTER From POWER TRANSFORMER 1 8 W501 2 3 4 5 6 7 9 12 13 14 15 1
11、6 17 18 A.GND DC 10V TW L TW R 19 11 10 CT.GND SH FL1 DATA D.GND TUNER L/C TUNER R MID L MID R SW MIC -B(-7.5V) V.GND CE/REQ CLK SH FL2 20SYNC +B6 Rch Rch -B3 To SOUND PROCESSOR BLOCK DIAGRAM LC72 CE LC72 DO/ST LC72 CK DATA1 CLK1 DATA IN CE1 345 LC72 DI 2 LC8A524A5N28 IC901 SYSTEM CONTROL / FL DRIVE
12、 Rch 94 SH CS 97 SH CK 9596 SH DO SH DI SYNC 100 SD 21 SH REQ SW CONT. 12 X0 X1 14 ABC 11109 G 8 2 13 BU4053BCFE2 IC201 SIGNAL SELECTOR 1 15 Y1 Y0 VDD 16 +B5 VSS 7 -B3 9 SEL/ TUNER SD LC72721NMTLM IC151 RDS SIGNAL DEMODULATOR VR901 (VOLUME) 2423 VR JOGA VR JOGB LC8A524A5N28 IC901 SYSTEM CONTROL / FL
13、 DRIVE 29 REMO- CON Z901 REMOTE SENSOR +B9 17G 3137 P135 4045, 4750 5271, 7377 FL901 FL DISPLAY D933,934 78 REGIN0 81 TIMER 82 S.W LED D951 (DIGITAL S.WOOFER) 80 STANDBY D954 (PLAY/REC) D306 () DET 28 RDS DATA RDS CLK 27 CLOCK RECOVERY (1187.5Hz) RDDA RDCL PCL RDS-ID IDR RDS-ID DETECT 57kHz BPF (SCF
14、) PLL (57kHz) VREF CINFLOUTVREF VDD Vss MPXIN T1 T2 T3 T4 TEST XOUTXINSTDBY OSC/DIVIDER CLK(4.332MHz) 101120 14 19 8 7 2 4,12 3,13 +B2 1 56 16 17 9 15 18 X151 REGIN1 1617 X901 (6MHz) XC IN XC OUT 1314 X902 (32.7kHz) X IN X OUT CRT TIMER D903 99 ANTIALIASING FILTER SMOOTHING FILTER REFERENCE VOLTAGE
15、DATA DECODER 79 MUTING Q607 (Q608) MUTING Q606 MUTING Q605 88 MUTE2 MUTE2 SURROUND SPEAKERS CENTER SPEAKERS (8 ) SPEAKERS R ch HEADPHONES KEY SWITCH (S901915) 1920 KEY TU KEY KARAOKE Q901, D904 RESET 12 RESET +B9 15 Vss 89 Vss2 90 VDD2 +B7 VDD1 VDD3 VDD4 184672 D902D901 LC8A524A5N28 IC901 SYSTEM CON
16、TROL / FL DRIVE 1621 GND 1047 5 1 (2) 6 3 20 15 19 (18) 26 (25) 23 24 RSN311W64A IC601 POWER AMP +B3 D601 -B1 D602 -B2 Q601,602 9 +B8 Q551,554,555 13 POWER 98 E DET HP SW 26 AC IN AC IN 8687 /ECO /ECO POWER POWER 11 +B7 1 CHECK TP 14 N Q503,558 +B4 51 -VP -VP 85 MUTE D906 SWITCH- ING D974 SWITCH- IN
17、G D907 22 8 11 (12) HIGH (6 ) MID (6 ) RLY602 RLY605 LOW (8 ) Q617 Q618 6 RL1 7 RL2 MUTING CONT Q911 (Q912) Q902,961 -VP MUTING MUTE2 SIGNAL LEVEL DET RELAY DRIVE RELAY DRIVE +B11 +B11 POWER CONTROL CIRCUIT POWER CONTROL/ PROTECTION CIRCUIT POWER TRANSFORMER F1 AC IN L701 T701 D702,704, 752,754,755
18、Q709 Q707 +B4 +B5 -B3 Q702,705 Z701RLY702 Q791 POWER TRANSFORMER T702 D741744 RL701 -B1 -B2 Q703,704 +B8D701,703, 751,753 Q706 Q701 +B1 Q723 +B2 Q711,725 D717720 +B6 D705 -VP FL1 FL2 FL DISPLAY (FL901) Q708 +B3 POWER SYNC /ECHO Q726 +B7 +B9 +B10 D902 D901 AC IN D956 (TRI-AMPLIFIER) D746 REGULATOR RE
19、GULATOR REGULATOR REGULATOR SWITCH- ING SWITCH- ING REGULATOR REGULATOR REGULATOR RELAY DRIVE RELAY DRIVE +B11 +B11 +B7 NOTES :SIGNAL LINE : FM SIGNAL : AM SIGNAL : FM OSC SIGNAL : AM OSC SIGNAL : SOURCE SIGNAL : CENTER SP. DRIVE SIGNAL : SURROUND SP. DRIVE SIGNAL () indicates pin No. Right channel.
20、 ABCDEF 1 2 3 4 5 6 7 8 R929 R955 R988 R991 R937 R936 R926 R935 R987 R914 R910 R909 R953 R951 R943 R961 R155 R151 R152 R153 R154 R924 R925 R922 R921 R944 R906 R905 J J J J R915 R916 R954 R996 R990 R934 R930 R931 1 2 3 VR901 (VOLUME) R923 R918 R957 R919 R969 R933 R967 R993 R986 R939 R960 R911 R976 R9
21、52 R928 R938 R904 R903 R902 R511 R509 R510 R946 R908 R950 R945 R962R949 R158 R907 R913 R959 R958 R975 R932 J J J J J J J J J J J J R956 R995 R942 R968 R965 R997 R966 R941 R984 R912 D956 (TRI-AMPLIFIER) D951 S913 J 15 1413 1211 109 8 7 6 5 4 3 2 1 W902B J J J J J J J J J C902 C931 C915 C903 D903 C961
22、 C901 C922 C920 C928 C913 D961 Q961 B C E Q902 E C B D906 D901 D902 C921 C926 C905 C912 C924 C917 C157 C152 C153 C160 C156 C510 C509 C395 C396 C923 C155 C154 C908 C907 C925 C909 C904 C911 C910 15 1413 1211 109 8 7 6 5 4 2 1 W901B 3 D973 D934 D933 D915 D904 D974 D907 D905 J L901 L902 L153 L151 L152 J
23、 S915 (RDS DISP MODE-PTY) S914 (RDS DISP MODE-PS) S907 (SET) S906 (TUNING MODE) S905 (FM AUTO/ MONO) S903 (CLOCK/TIMER, DEMO) S902 (MODE) S904 ( PLAY/ REC) S908 (INPUT SELECTOR) S909 (6CH DISCRETE INPUT) S912 (TUNER BAND) J J J J J J J J J J J J 1 5 10 15 20 25 30 35 40 45 50 55 60 31 51 65 75 70 80
24、81 85 90 95 100 IC901 Q901 B C E 3 2 1 X901 J J J X902 1 2 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 53 54 FL901 C914 C916 C918 J J J J R901 R963 R964 R512 J J J J C158 C159 C151 C919C927 Z901 (SENSOR) 3 2 1 X
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