Technics SA-EH670, Service Manual

Page 1: ...AD0105109C2 Tuner Amplifier SA EH670 Colour S Silver Type Areas E Europe EG Germany Italy France Netherlands and Denmark EP East Europe SPECIFICATIONS 1...

Page 2: ...tage AC 230 V Consumed current 50 Hz 70 300 mA 2 Protection Circuitry The protection circuitry may have operated if either of the following conditions is noticed No sound is heard when the power is sw...

Page 3: ...0019 1X 1 pc AM loop antenna set RSA0022 L 1 pc FM indoor antenna RSA0007 1 pc Speaker cords REE1057 2 pcs Remote control transmitter EUR7702170 1 pc Remote control batteries R6 LR6 AA UM 3 2 pcs Note...

Page 4: ...ation of the major printed circuit boards and replacing the main components For reassembly after operation checks or replacement reverse the respective procedures Special reassembly procedures are des...

Page 5: ...Follow the Step 1 Step 3 of item 5 1 Check the operation P C B as shown below 5 3 Checking for the main P C B Follow the Step 1 Step 3 of item 5 1 Follow the Step 1 Step 6 of item 5 2 5...

Page 6: ...6...

Page 7: ...Check the main P C B as shown below 5 4 Replacement for the regulator transistor Follow the Step 1 Step 3 of item 5 1 7...

Page 8: ...Step 3 of item 5 1 Follow the Step 1 Step 6 of item 5 2 Follow the Step 1 Step 10 of item 5 3 6 To Supply Power Source This unit SA EH670 is designed to operate on power supplied from system connecte...

Page 9: ...etween W902A Pin 3 and C740 GND Refer to Fig 6 2 2 Connect this unit to an AC power supply cord This unit come to stand by mode 3 Turn the unit ON Fig 6 2 Notes Use only this method when checking the...

Page 10: ...61 Automatically displays on the tuner amplifier when a malfunction occurs Refer to Fig 7 1 Fig 7 1 7 2 To return to the normal display 1 For U70 CD U70 DECK Press an any operation button on the tuner...

Page 11: ...ayed on the tuner amplifier the tape deck or CD Player cannot be operated by remote control Correction Procedure 1 To check for correct insertion of flat cables Insert each connectors until you hear a...

Page 12: ...EH670 output IC IC601 When a DC voltage is applied to speaker terminals 8 Schematic Diagram Notes This schematic diagram may be modified at any time with the development of new technology Notes S901 P...

Page 13: ...theinternal impedance of the DC circuit tester No mark Power ON FM or AM Important safety notice Components identified by mark have special characteristics important for safety Furthermore special pa...

Page 14: ...tive voltage line Negative voltage line AM signal line AM OSC signal line FM signal line FM OSC signal line Audio signal line 9 Schematic Diagram 10 Printed Circuit Board Diagram 11 Type Illustration...

Page 15: ...SET I Reset signal input 13 X IN I Oscillator connected terminal 32 7 kHz 14 X OUT O 15 VSS GND terminal 16 XC IN I Oscillator connected terminal 6 MHz 17 XC OUT O 18 VDD 1 I Power supply terminal 19...

Page 16: ...REGIN1 81 STANDBY O LED STANDBY drive signal output 82 TIMER O LED TIMER drive signal output 83 S W LED O LED MUTING drive signal output 84 LOUNGE LED LOUNGE drive signal output Not used connected to...

Page 17: ...ty Furthermore special parts which have purposes of fire retardant resistors high quality sound capacitors low noise resistors etc are used When replacing any of components be sure to use only manufac...

Page 18: ...CREW 2 17 XTBS3 8JFZ1 SCREW 2 18 RLBT4001 N FERRITE CORE 1 19 RMN0582 HOLDER 1 20 XTB3 12FFZ SCREW 1 21 XTB3 20JFZ SCREW 1 A1 EUR7702170 REMOTE CONTROL 1 A1 1 UR64EC2337E BATTERY COVER 1 A2 RSA0007 FM...

Page 19: ...5 50V 0 047U 2 C647 50 ECBT1H102KB5 50V 1000P 4 F1D1H102A012 C651 ECBT1H473KB5 50V 0 047U 1 C652 ECBT1H102KB5 50V 1000P 1 F1D1H102A012 C655 56 ECA1CAK100XB 16V 10U 2 C664 ECEA1CKS100 16V 10U 1 C671 72...

Page 20: ...U 1 C919 20 RCE1HKA4R7BG 50V 4 7U 2 F2A1H4R70009 C921 ECBT1H102KB5 50V 1000P 1 F1D1H102A012 C922 ECA1VAK330XB 35V 33U 1 C923 24 ECBT1H104KB5 50V 0 1U 2 F1D1H1040002 C925 26 ECBT1H102KB5 50V 1000P 2 F1...

Page 21: ...1 D906 07 MA165 DIODE 2 MA2C165 D933 MA165 DIODE 1 MA2C165 D951 LNJ301MPUJAD LED 1 D954 SELS5923C LED 1 B3ADA0000083 D961 MA4075M DIODE 1 MAZ40750M D973 MA4030M DIODE 1 MAZ40300M D974 MA165 DIODE 1 M...

Page 22: ...1417PQTA TRANSISTOR 1 2SB14170JA Q701 2SD2374PQAU TRANSISTOR 1 2SD23740J1AU Q702 2SB1548PQAU TRANSISTOR 1 2SB15480J1AU Q705 2SA1995RSTA TRANSISTOR 1 B1ACDF000006 Q707 2SB1417PQTA TRANSISTOR 1 2SB14170...

Page 23: ...1 R639 40 ERDS1FJ100 10 2 R641 42 ERDS2FJ100 1 4W 10 2 R647 48 ERDS2FJ2R2 2 2 2 R649 52 ERDS1FJ100 10 4 R671 72 ERDS2FJ272 1 4W 2 7K 2 R673 ERDS2FJ331 1 4W 330 1 R674 ER0S2TKF5362 METAL FILM RESISTOR...

Page 24: ...R910 ERDS2FJ222 1 4W 2 2K 1 R911 ERDS2FJ332 1 4W 3 3K 1 R912 ERDS2FJ472 1 4W 4 7K 1 R913 ERDS2FJ821 1 4W 820 1 R914 ERDS2FJ102 1 4W 1K 1 R915 ERDS2FJ122 1 4W 1 2K 1 R916 ERDS2FJ152 1 4W 1 5K 1 R918 E...

Page 25: ...94 ERDS2FJ104 1 4W 100K 2 R995 ERDS2FJ221 1 4W 220 1 R996 97 ERDS2FJ151 1 4W 150 2 R999 ERDS2FJ104 1 4W 100K 1 RL702 RSY0040M 0 RELAY 1 S901 08 EVQ11G05R SW PUSH 8 S910 15 EVQ11G05R SW PUSH 6 T701 RT...

Page 26: ...17 Packaging 26...

Page 27: ...F010500000YM KH 27...

Page 28: ...727 R510 R563 R558 R607 R608 R598 R597 R570 R561 R591 R559 R557 D555 D552 D757 D658 D551 D756 C550 C647 J J J J J J C721 R572 R544 R610 R624 R638 J J C604 C608 C603 C607 C649 C650 C612 J R627 C613 R55...

Page 29: ...C B Q726 D500 D711 D746 D740 J J C754 C758 D745 C759 R777 D742 D743 D741 D744 J J J J J J J J J C755 C753 W1 W3 D747 AC IN P C B D AC IN 230V 50Hz REP3116G S CENTER SURROUND SPEAKERS POWER TRANSFORME...

Page 30: ...1 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 53 54 2 5 7 9 W905 S901 C928 50V4 7 NOTE The number which noted at the connectors on the schematic diagram as SCHEMATIC DIAGRAM 1 or SCHEMATI...

Page 31: ...17 P18 P19 P20 P21 P22 P23 P24 P25 P26 P27 P28 P29 P30 P31 P32 VDD4 P33 P34 P35 P36 P37 P38 REGIN0 REGIN1 8G REMOCON RDS DATA RDS CLK HP SW MIC DET VR JOGA VR JOGB NC GND SH REQ KEY KARAOKE KEY TU VDD...

Page 32: ...45 100 R961 22K R943 100 C917 0 01 C155 1000P C153 1000P C160 1000P C159 6 3V47 R152 1K R151 1K C154 560P C158 6 3V47 C151 16V10 M B C R946 1K C909 1000P C918 6 3V100 D E A R941 1K L153 1 H R155 120 D...

Page 33: ...510 0 01 R693 1K R692 1K C664 16V10 C725 16V47 A C R696 47K Q609 610 2SD2144STA MUTING Q609 Q610 Q612 UN411FTA MUTING CONT B C R694 22K R511 47 R509 47 R512 47 R510 47 W501 D719 RL1N4003N02 D720 RL1N4...

Page 34: ...R R738 3 9K R739 47K C622 10V100 D659 MA165TA D751 1N5402BM21 D703 1N5402BM21 D753 RL1N4003N02 D761 RL1N4003N02 D755 RL1N4003N02 D752 1N5402BM21 D702 1N5402BM21 D704 1N5402BM21 G F E D A B C D558 MA16...

Page 35: ...0HTA R723 5 6K C719 0 047 R725 10 C724 0 047 C710 0 047 R551 68K R552 68K R553 3 9K R554 3 9K R555 1 5K C553 50V0 47 C550 0 01 D552 MA165TA D555 MA4100MTA R797 0 E602 E601 R749 1K D739 MA165TA POWER S...

Page 36: ...8 9 10 11 12 2 1 3 4 5 6 7 8 CENTER 8 SURROUND 8 D AC IN CIRCUIT 2 1 3 4 5 6 7 8 9 10 11 12 R649 10 C627 0 1 2 1 3 4 5 6 7 8 R777 1K R774 18 D711 RL1N4003N02 R773 18 R712 2 2K A B A B R795 3 9K D743...

Page 37: ...D E F LC72131M PLL FREQUENCY SYNTHESIZER AM ANT EXT LOOP FM ANT 75 SCHEMATIC DIAGRAM 8 100 0 01 100 2SC2413 BUFFER AMP 2SK360 FM OSC 2SK360 RF AMP 22P 15P 22P 0 022 2 7K 47P 33K 100K 2P 8P 10K 10K 33K...

Page 38: ...0 01 150P 68K 0 1 10 22K 4 7 4 7 47K 1000P 3 3 A D B C 10K 0 01 330 1000P LA1833MN FM AM IF AMP DET AM OSC MIX FM MPX A B B A D A 2SC2712 SWITCHING 3 3K 2SC2413 FM IF AMP 2SC2413 FM IF AMP 330 SCHEMAT...

Page 39: ...A1995RSTA 2SC5398RSTA 2SC3940AQSTA 2SB1548PQAU 2SD2374PQAU 1SS291TA MA700ATA MA4100MTA MA4150HTA MA4300MTA MA4140MTA MA4180LTA 1N5402BM21 RL1N4003N02 MA4030MTA MA4051MTA MA4068LTA MA4075MTA MA4082LTA...

Page 40: ...ROCESSOR 1 4 W722A 1 10 W721A 12 1 CP601 8 1 CP602 SPEAKERS C POWER SUPPLY P C B W701B 1 10 T702 Power transformer D AC IN P C B W1 W3 1 8 CN602 1 12 CN601 AC IN CENTER SURROUND SPEAKERS E POWER TRANS...

Page 41: ...emote control Buttons such as 1 function in the same way as the controls on the main n Sleep timer button SLEEP o Numbered buttons 1 9 0 L p Cursor buttons 2 1 3 4 q Tape select deck 1 deck 2 select b...

Page 42: ...O SWITCH 17 FM AM I F AMP DET AM OSC MIX FM MPX LA1833MN 15 PILOT CANCEL PHASE DET 16 VCO FF FF PILOT DET FF AM DET DECODER BO1 6 IO2 12 19 Vss Power ON RESET PLL FREQUENCY SYNTHESIZER LC72131M B2 GND...

Page 43: ...h IN S W MIC B 10V V GND CE REQ CLK SH FL2 20 SYNC B5 Rch Rch B3 To SOUND PROCESSOR SH EH670 BLOCK DIAGRAM LC72 CE LC72 DI ST LC72 CK DATA1 CLK1 DATA IN CE1 3 4 5 LC72 DO 2 C2BBFD000317 IC901 SYSTEM C...

Page 44: ...RDS CLK 27 REGIN1 16 17 X901 6MHz XC IN XC OUT 13 14 X902 32 7kHz X IN X OUT 80 C1BB00000527 IC151 RDS SIGNAL DEMODULATOR CLOCK RECOVERY 1187 5kHz DATA CLK IDR RDS ID DETECT RAM 57kHz BPF SCF PLL 57kH...

Page 45: ...10 2 1 6 3 20 15 23 22 26 25 24 RSN309W44B IC601 POWER AMP B3 D601 Q601 602 9 B7 Q551 554 555 13 POWER 98 E DET HP SW 26 SASYNC AC IN 88 POWER POWER 11 B8 1 CHECK 14 N Q503 D558 51 VP VP 86 MUTE D906...

Page 46: ...B1 Q723 B2 Q711 725 D717 720 B6 D705 VP FL1 FL2 FL DISPLAY FL901 Q708 709 B3 AC IN SHSYNC POWER Q726 B6 B8 B9 D902 D901 SASYNC D746 REGULATOR STABILIZER REGULATOR REGULATOR REGULATOR SWITCH ING REGUL...

Page 47: ...R924 R925 R922 R921 J J J R952 R976 R928 R950 R945 R962 R949 C912 C908 C907 C925 C909 C904 C911 C910 D907 J J J J J 3 2 1 X901 J J X902 C914 C916 C918 B C E Q901 R151 R152 R153 R154 L152 R158 C152 C15...