A li gnrn en tTn st r u cti o n s
Contents
1. RED REWIND LAMP ORANGE WIND BLACK BLUE STOP LAMP BROWN LIGHT GREEN WIND LAMP REWIND NOTES UNLESS OTHERWISE SPECIFIEOQ RESISTANCE IN OHMS COMPONENT NO 301 399 ARE ASSEMBLY 1At COMPONENT NO S 401 499 ARE ON ASSEMBLY 2 2 SWITCHES ARE SHOWN IN THE POWER OFF POSITION UNLESS OTHERWISE SPECIFIED ALL DIODES ARE 1N4148 SIGN DENOTES 3 5 BETWEEN 8 AND WT9 10V 4 IN REWIND MODE e IN WIND MODE WT11 22 IN PLAY MODE T RECORD BLACK RECORD PURPLE r REC LAMP IDARK GREEN GROUND STOP 18 V GREY PLAY WHITE PLAY LAMP YELLOW REMOTE CONTROL SOCKET 1 9 444 040 157 Q402 BC147 237 PINCH ROLLER SOLENOID _ 339 amp 19 1 REWIND PLAY RECORD lt gt lt gt lt gt 921 SH 2 8 fA or jw a a x ty CU 315 0404 0405 5 147 ol 147 2 D T 0 R3 Hey 1 u 2 5 I Il Y2 aY Yro 157 2 Sy osciLATOR TO REMOTE CONTROL Q315 BC147 PHONO tt BC 147B r MIC LINE AMP NOTES 1 3 2 TERMINAL NO S FOR THE R CHANNEL ARE GIVEN IN BRAC2. PART OF A3 NOTES DOLBY N R 1 UNLESS OTHERWISE SPECIFIED RESISTANCE SFF IN OHMS 23V 33k 0222 3 9 2 PLUG TERMINAL NO S FOR THE R CHANNEL lt ARE GIVEN IN BRACKETS BESIDE THE 1 5 52 L CHANNEL PLUG TERMINAL NO S n 6 lt J J25 3 J13 4 a 226 3 13 6 5 3 L cHANNEL HAS 1301 1399 AND R CHANNEL GROUND ej HAS 1401 1499 AS COMPONENT NO S WHEN REFERING TO R CHANNEL COMPONENT ADD 100 TO THE CHANNEL NO S E G R1301 OF THE L CHANNEL HAS THE 8 OSCILLATOR NOTES 1 4 SAME VALUE AS R1401 OF THE R CHANNEL 4 54 1 HIGH IN WIND REWIND LCH AMP L CH 2 lso a 36m 4 OSCILLATOR 1 S4B 60 2 11 1509 78072 if pez Pen R1508 3 lt Jono lt L C BC 147 READ 52 2 NOTES Orio REC HEAD ic 330 1 UNLESS OTHERWISE SPECIFIED RESISTANCE R CH 2614 IN OHMS 123 98 HANN 2 PLUG TERMINAL NO S FOR THE R CHANNEL 156 2 gt 13 5 v ARE GIVEN IN BRACKETS BESIDE THE 61514 1505 1508 L CHANNEL PLUG TERMINAL NO S lt C1616 2 20 3 L cHANNEL HAS 1501 1599 R CHANNEL REC AMP 0258 1 23 3 330p HAS 1601 1699 AS COMPONENT NO S R CH of WHEN REFERING TO R CHANNE
3. 1 I 1 BRF NORMAL 1 als 1 53 5 1 II S 2120s BI LEVEL 13 LES L per L __PART OF 1 LPARTOFAS_ J pe RET J L CONTROL l BOARD INPUT L CH m R102 PUT RCRD 090 27 1 27 2 Y R103 R104 R 100 330 1 w 25k t 4 I INPUT LEVEL ART OF 9 MIC DOLBY ENCODER R CH 1 3 1 Rza 0 31 ayes nae 15 OF I PART 5 REC 02 1 I LEVEL ADJ s 2232 2 aj amp ol 2 THE SWITCHES ARE SEEN FROM THE SOLDER SIDE DOLBY NR POWER OFF p NORM MEMORY FM MONITOR REC PRESET i 3 o fd 80 of 3 3 cas 5 st 6 of 6 7 s s jo of 9 52 SwITCHES ARE PLACED lt ii onnon 923 23 58 55 OREN a gt s 57 BC1478 BOARD NOTES 1 4
4. 5811 817 Tes 1 r A 77 1 1 REC HEAD PART A2 a I a msy 1 Part f ice Poe 1 cy AMP L CH I I 012 1 1 PART OF 1 l HEAD R CH gt OSCILLATOR L FREQUENCY 80 100kHz 1 ERASE HEAD aoar REC METER I gt ADJ 1 R215 i 5 DRIVE z F cr MOTOR 3 WTS z3 C138 60Hz 1 Se I 25 X J46 3 5 s soda 1 REC OF AG I ADJ Vises pune L R CH SB tTn a FM MPX AND AZIMUTH CAL SWITCHES ARE SEEN FROM THE FRONT SIDE oe sor ears oF 123 123456 FM MPX SWITCH AZIMUTH CAL SWITCH PLACED ON Al PLACED ON A8 r SOURCE LEVEL ADJ 4 BY NR 1 5 T5730 229201 4 1 352 20 126 31 6 96 ON EQUAL PLAYB I DOLBY DECOOER x agm OUTPUT AMP AMP R cCH P23 3l seal J tens PART OF SP Pis a 22654 _052 1 part of ar 252741 PART I He le R221 6 1 1 ae a Ai u SL Bal Z z lu k LEVEL ADJ S lly o yf 1 r st amp l 2 at A rfi I F 5 I I LEV
5. csos 4 e 2 5 5 U1001 C1018 Gig Bl 8 ef A 01002 220 can eije R50 902 Q901 C906 ROE cio croft EO cite 603 1 dP 61012 111111111111 903 aa Seb Ro 8 6 A5 DOLBY ENCODER o R906 903 SISTANCE CHANNEL JE IANNEL OMPONENT 5 AS THE R CHANNEL EQUAL PLAYBACK NOTES 1 3 RUN I 18k gt 13 5V 1104 22 R1112 R1113 R1114 1109 251 1 F 5231 gt OUTPUT 051 3 INPUT G P23 al L PART 9110 cio2 23 EQUAL PLAYBACK NOTES 1 UNLESS OTHERWISE SPECIFIED RESISTANCE IN OHMS 2 TERMINAL NO S FOR THE R CHANNEL ARE GIVEN IN BRACKETS BESIDE THE L CHANNEL PLUG TERMINAL NO S 1101 1199 AND R CHANNEL HAS 1201 1299 AS COMPONENT NO S WHEN REFERING TO R CHANNEL COMPONENT ADD 100 TO THE L CHANNEL NO S E G R1101 OF THE L CHANNEL HAS THE SAME VALUE AS R1201 OF THE R CHANNEL A7 DOLBY DECODER INPUT NOTES 1 4 DOLBY B TYPE INTEGRATED CIRCUIT SIGNETICF SE 545 CR1301 Logic 2841 ZF5 6 _ L 14148 g Q1301 154 3 BC147B L CR1305 GROUND R1402 OUTPUT CR1307 am
6. psec ce TT lt gt PS0 8 _ 23 15 723 126 2550 apr Dd Haise P50 9 T55 J te oq PSOE 1 1 rew gt x 2 a 9 5 358 Sja ag 1 4 I I R522 10180 4 1 I iP 25 L _ y SP seru R ar I F 109 a L AD 2 21320 121 I CASS ILLUM 2 12316 POWER OFF NORM MEMORY MONITOR REC 50 51 SPEC ew PRESET METER ILLUM las LEVEL ADJ t ee el lt 353 3 13 3 OFF 1 amp EQUAL 1 EQUAL PLAYB I DOLBY DECODER ON 1 1108 mv 1217 2 AMP L CH 462 AMP 1 m 1 51 2 I PART OF Ag 1461 O T PART OF 325 4 153 1 PART OF 7 gt 4 L CH o a EVEL gt I ee x 8 0 J Ly 2 L 5 1 1 T sie 15 57 r ay step Ta gt rs dl c i 101 fare 13 5 15 8 j C1478 L501 gt Fr 3 4 I Aan BC1478 I l i s I Fie seal 8 12 T OUTPUT 1 I 1 LEVEL mio ako L CH 25 PART OF TAPE PART OF 9 19 7 FEAOPHONES Lee J ued 8122 I R CH R222 ol 56 REC METER apy 07 aoe sS asss s
7. 3 OUTPUT MIC LINE AMP NOTES 1 untess OTHERWISE SPECIFIED RESISTANCE IN OHMS 2 PLUG TERMINAL NO S FOR THE R CHANNEL ARE GIVEN IN BRACKETS BESIDE THE L CHANNEL PLUG TERMINAL NO S L CHANNEL HAS 511 599 AND R CHANNEL HAS 631 699 AS COMPONENT NO S WHEN REFERING TO R CHANNEL COMPONENT ADD 100 TO THE L CHANNEL NO S 6 RSI OF THE L CHANNEL HAS THE SAME VALUE AS R61 OF THE R CHANNEL A5 DOLBY ENCODER INPUT 1 20 7 5 9901 BC149C C903 C906 E 20 3 GROUND P20 8 22 DOLBY N R OFF NORMAL ON FM 28 S3A Basy 4 I 3 P13 13 L PART OF A3 4 NOTES 1 5 DOLBY B TYPE INTEGRATED CIRCUIT SIGNETICS 545 1 UNLESS DOTHERWISE SPECIFIED RESISTANCE IN OHMS 2 PLUG TERMINAL NO S FOR THE R CHANNEL ARE GIVEN IN BRACKETS BESIDE THE L CHANNEL PLUG TERMINAL NO S 3 cHANNEL HAS 901 999 AND R CHANNEL HAS 1001 1099 AS COMPONENT NO S WHEN REFERING TO R CHANNEL COMPONENT ADD 100 TO THE L CHANNEL NO S E G R901 OF THE L CHANNEL HAS THE SAME VALUE AS R1001 OF THE R CHANNEL 4 R907 2 2K C903 15n GIVES 75 25 DOLBY FM COMPENSATOR R907 3 9 903 2 GIVES a 50 25 DOLBY FM COMPENSATOR 1001 11002 48 1901 902 919 g 5 k rat 1 791 7 a eee eee ES C1017 Jt ejiectoos E H cog 44899
8. TCD 340 A Circuit Diagrams wi S with Alonmeni Instructions Aight Couene ever Left Channei Typed Electrical adjustments for the TCD 340A General Before adjusting the tape path must be cleaned and demagnetized It is necessary that the tape path is correctly adjusted consult the service manual for the TCD 330 part No 714021 Carry out the adjustments m the order described because the adjustments affect each other Remove the top panel base panel and right side panel Equipment required 2 volt meters Audio signal generator Frequency counter Distortion meter Wow and flutter meter Tandberg test cassettes No 21 Speed check 1000 Hz No 22 Wow and flutter check 3150 Hz No 23 Azimuth adj playb head 6300 Hz No 24 Playback level adj 1000 Hz Measuring cassettes Maxell UD XL I Type D Maxell UD XL II Type ID Before adjusting set the buttons to MPX FILTER situated at the back of the deck to OFF Dolby NR to Tape to Type I Output Level controls to max The word Dolby is registered trade mark of Dolby Laboratories Inc USA NR stands for Noise Reduction Figure 1 Oscillator The oscillator frequency is between 80 and 100 kHz The voltage measured on the erase head should be between 25 and 32 volts Sensitivity adjustment Set the Mon
9. METER ADJ to approximately 3 dB deflection on the right meter Check also that the meter deflection with a Type tape is within the meter scale Speed check Play back Tandberg test cassette No 21 speed check 1000 Hz and measure with a frequency counter on the OUTPUT sockets lt 0 5 995 to 1005 Hz Wow and flutter Play back a Tandberg test cassette No 22 3150 Hz and measure with a wow and flutter meter on the OUTPUT sockets Weighted RMS lt 0 09 Weighted Peak DIN 45511 lt 0 2 Record playback Record from a generator 3150 Hz check with a frequency counter and measure with the wow and flutter meter on the OUTPUT sockets Weighted RMS lt 0 12 A4 EQUAL AMP NOTES 1 4 705 R707 325V C796 1 6 476 5 6 70 13 5V ton Tey T b amp l 148 2 dt OUTPUT 0705 BC 548 B 1 y 1 UNLESS CTHERWISE SPESIFIED RESISTANCE IN OHMS 2 PLUG TERMINAL NO S FOR THE R CHANNEL ARE GIVEN iN BRACKETS 5 0 THE L CHANNEL PLUG TERMINAL NI S 3 L CHANNEL SAS 701 799 AND R CHANNEL HAS 80 859 AS COMPONENT NO S WHEN REFERING 10 R CHANNEL COMPONENT ADD 105 TS THE L CHANNEL NO S IEG R701 OF THE L CHANNEL HAS THE SAME VALUE AS R801 OF THE R CH 4 C510 22n ON EUROPEA
10. 10 NOTE The record height screws must be adjusted by equal amounts to ensure that the head paral lelism does not change Overall frequency response with Type I Tape bias Set the Monitor button to Tape Apply 1000 Hz from the signal generator to one of the inputs Reduce the level at the signal generator by 35 dB or reduce the level by a similar amount on the Input Level controls Press the Record button and adjust the BIAS ADJ 1502 and C1602 to obtain maximum reading at the outputs Sweep the audio generator through the full fre quency range and check that the response curve is correct If necessary adjust the curve with C1502 and C1602 to obtain the correct response 3 dB 30 to 18000 Hz C1602 BIAS ADJ TAPE 9 C1502 BIAS ADJ TYPES L R1508 BIAS ADJ 11 TAPE L R Fig 4 Bias adjustments Adjusting the record current Source Tape Type Tape Use the same input level as for the bias adjust ment 35 dB and 1000 Hz Adjust the record current by means of the REC LEVEL ADJ pots R108 and R208 to obtain the same output level for both positions on the Monitor button Then depress the Dolby NR button and check the overall frequency response Overall frequency response with Type 1 Tape bias Use the same procedure as for the Type I tape Insert a Maxell UD XL II or an equivalent ta
11. D 100 TO THE L CHANNEL NO S R1701 OF THE L CHANNEL HAS THE SAME VALUE AS R180 OF THE R CHANNEL 50 53 362 P49 5 e e 2 1 2 1 C1704 _ A aro 4s 0170 61701 70 e Ris03 e 81717 91802 01702 1702 5 er ae 1602 REG REC PRESET MONITOR MEMORY TAPE POWER CJ Cee 7 A9 METER AMP 1658 9 78 Part No 714092
12. EL I LPART OF J TABLE SENSITIVITY OF AMPLIFIERS NOTES SENSITIVITY AT 1000 1 UNLESS OTHERWISE SPECIFIED RESISTANCE IN OHMS 2 ALL SWITCHES ARE SHOWN IN THE POWER OFF POSITION 80 3 LEFT CHANNEL COMPONENTS HAVE 101 130 RIGHT CHANNEL 25 COMPONENTS HAVE 201 230 gt COMPONENTS COMMON FOR BOTH CHANNELS HAVE 131 199 22 mv 775 LOGICAL LEVELS FROM LOGIC BOARD i J38 1 ONLY LOW IN RECORD wy 24 5 ONLY LOW IN PLAY ves 4 139 4 ONLY HIGH IN STOP 80 mv J5 6 ONLY HIGH IN WINO ANO REWIND L LOW IS VOLTAGE BELOWE 15 40 mv HIGH IS VOLTAGE ABOVE 10V oe 15 775 02 15 v 800mA gt TRANSFORMER 110 60 TO REMOTE CONTROL 6 2 LOGIC NOTES 1 6 238 3 2 415 10 9408 0403 0405 0408 2 12 9 9 9 amp O O C406 Oly a S 39 5 fe S S 0405 C407 x 5 ei gt 1 CR 430 DOLBY DEC M S 3 CASSETTE J2 1 J2 2 4 R324 CR313 5 5k PART OF 1 MOTOR CONTROL M S 2 RECORI 238 3 D J9 2 4 RECORD PRESET 2 3 5 6 MEMORY cas COUNTER REWIND 78 J35 1 2 3 P5 5520195 sss 8
13. KETS BESIDE THE L CHANNEL PLUG TERMINAL NO S 1 CHANNEL HAS 501 510 AND R CHANNEL HAS 601 610 AS COMPONENT NO S WHEN REFERING TO R CHANNEL COMPONENT ADD 100 TO THE L CHANNEL NO S E G R501 OF THE L CHANNEL HAS THE SAME VALUE AS R601 OF THE R CHANNEL 4 J eee 5 l vac e 39 995 Sy ie D E Ne 2 3751 TST st 9 rS SS 5 r my E 24 T Lf A2 LOGIC BC NOTES 1 UNLESS OTHERWISE SPECIFIED RESISTANCE IN OHM a asn Deet LU Tx 9514 12 ire hl bh bel 1 Fee Q ER Feet OU WIND STOP R422 53 R412 806 CRAZ amp 000000 0 Seesecee 5 0406 Fr 008 U404 N 8 30 e e I A 8 ay PS Sf S Pe 1 Z 111111 ka C BOARD q A3 OUTPUT AMP NOTES 1 3 RSIS 158 12 5 P12 6 Qs o 2 12 1 GROUND J 1 8856525 MEMORY B RECPRE SET ar aig eet Tf 1 se J TTETTEETETT 1 81 m0503 0502 0501 0603 0602 0601 s MONITOR s 1 1 T 2 42504 _1 607 605 1501 L601 ey PONPES Bis L 21 6 9 1 6 s 111111 111111111 11111111 111 t
14. L COMPONENT R1503 ADD 100 TO THE L CHANNEL NO S MAIN 5 E G 1501 OF THE L CHANNEL HAS THE BOARD SAME VALUE AS R1601 OF THE R CHANNEL 501 Low LEVEL BELOW 15 ON J57 2 456 IN RECORD 596 crisoz 01503 ae BC 147 tosic 1506 65 91501 1478 R1510 157 3 AZIMUTH CAL 0SC t u Za am m eye Z r TAPE THE AZIMUTH CAL SWITCH ARE SEEN FROM THE FRONT SIDE 59 123456 N gt GROUND THE TAPE SWITCH ARE SEEN FROM SOLDER SIDE a C1404 tuos ag eo L 2 130 1305 6 a T C136 CR1304 C1314 01302 J55 1508 ae R5 r 50 04 C1602 EF a EE mad 701801 E eo TT I 1510 Ez 150 77 1 TA 01504 01501 bd a ra l a r ES me TTo ie TmT freee t es J016 ije ia A8 OSCILLATOR 9 METER NOTES 1 3 NOTES 1 UNLESS OTHERWISE SPECIFIED RESISTANCE IN OHMS 2 PLuG TERMINAL NO S FOR THE R CHANNEL ARE GIVEN IN BRACKETS BESIDE THE L CHANNEL PLUG TERMINAL NO S 3 cuANNEL HAS 1701 1799 R CHANNEL HAS 1801 1899 AS COMPONENT NO S WHEN REFERING TO R CHANNEL COMPONENT AD
15. N MODELS 510 10n ON USA MODELS A4 EQUAL wTa PP x Tm St at Ja 9306 m T v J wrs T 4 t axe gt Led a J e nmr 15103 e Rio z e he 46516 4h 25 B 25219 ra B ent B T gt F253 0 40 220 e gt e E 2 A Se o Fm x RIH e F235 ee 118 15 ajo 36 8301 H ee A1 MAIN BOARD a 8102 Re RD 02 l k r I MOTOR a J I 52 Hasy R520 CRH sa JH 7 4 28 8 s Al MAIN PA Ak m 1 2 NORMAL FITER N FM 3 2 58 f MIC LINE I 1 DOLBY rae ll DOLBY ENCODER L CH L P 220 51 Rgs ae 15 PART OF A3 PART OF A5 I SENSITIVITY I REC s 2 l m Eva N _ 333 2 3 22 z 2 n 1 F
16. ht Record azimuth Record height Figure 3 Adjustments for the heads Azimuth adjustment playback head Insert a Tandberg test cassette No 23 or a standard azimuth cassette Set the Monitor button to Tape and connect a voltmeter to each channel of the OUTPUT sockets Press the Play button Adjust the playback azimuth screws shown in Figure 3 to obtain maximum reading on each channel Playback level Insert test cassette No 24 Connect a voltmeter to each channel of the Dolby decoder output shown in Figure 2 Adjust the PLAYBACK LEVEL pots R119 and R219 until you read 775 mV on each channel Level meter adjustment playback Insert Tandberg test cassette No 24 When the playback level is correct adjust the level meter to 0 dB with PLAYBACK METER R114 and R214 Azimuth and height record head Use Maxell UD XL I or an equivalent tape Apply 1000 Hz to the INPUT sockets both channels Set the Monitor button to Tape and connect a voltmeter to the OUTPUT sockets both channels Press the Record button and turn the two record head height screws shown in Figure 3 by equal amounts the same number of degrees to obtain the maximum reading on both channels of the OUTPUT sockets or the best compromise Adjust the azimuth 10 kHz and the height alternatively until the head sits correctly Azimuth can also be adjusted with the built in control oscillator
17. itor button to Source position and Input and Output Level controls to maximum Apply 8mV 1000 Hz to the RADIO socket DIN or 80 mV 1000 Hz to the INPUT sockets Phono from the audio signal generator Adjust the SENSITIVITY ADJ pots R101 R201 to obtain 775 mV measured on a voltmeter con nected to the Dolby encoder output see Figure 1 Move the measure probe to the Dolby decoder output see Figure 2 Adjust the SOURCE LEVEL ADJ pots R118 R218 to obtain 775 mV Check the frequency response in Source Dolby encoder output Right channel meas point Left channel meas point PLAYB TREBLE ADJ R1201R RNL e R2i9 R PLAYB METER PLAYB L VEL RIAL R223 AZIMUTH METER ADJ I R208 R mis REC LEVEL T PE TAPE R213R REC METER R218R RH8L R109 L YPE SOURCE LEVEL REC LEVEL ADJ TYPE R201 R RIL SENSITIVITY ADJ MIC LINE AMP OUTPUT TRIMMING POTS ON MAIN BOARD SEEN FROM SOLDER SIDE Trimming pots and Dolby encoder measurement points Dolby decoder output Left channel meas point Or measure on R1303 Right channel meas point Or measure on R1403 He jad Za O i 9 e 1301 61908 nf cms Ra 130 Q Playback azimuth Playback heig
18. pe Set the Tape button to Type II position and press the Record button Check the frequency response and if necessary adjust the BIAS ADJ TYPE II TAPE pot R1508 to obtain the correct response Adjusting the record current Source Tape Type 11 Tape Use the same input level as for the bias adjust ment 35 dB and 1000 Hz Adjust the record current by means of the REC LEVEL ADJ pots R109 and R209 to obtain the same output level for both positions on the Monitor button R1101 and R1201 affect the treble response in the frequency region 15 18 kHz on the playback curve for all types of tapes Level meters adjustment record Set the Monitor button to Tape Apply 1000 Hz to the INPUT sockets both channels Press the Record button and adjust the Input Level controls for 1 5 volt reading on the OUTPUT sockets Adjust the REC METER pots R113 and R213 to obtain 0 dB on the level meters Distortion Record 1000 Hz at 0 dB deflection on the meters The max distortion for record playback is 3 Erase test Connect a microphone to the TCD 340A and record an overload signal Record again to erase the overload recording and play back to ensure that the overload signal cannot be heard Azimuth meter adjustment Set the built in oscillator to ON Set the Output Level controls to maximum Insert a Type tape and press the Record button Adjust R223 AZIMUTH
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