Technics-RSCH900-tape-sm 电路图 维修手册.pdf

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1、ORDER NO. AD9111264C8 Service Manual Cassette Deck * D O L B Y B - C NR HX PRO . ieievisieservice zyxwvutsrqponmlkjihgfedcbaZYXWVUTSRQPONMLKJIHGFEDCBA lD9a ; Jud c S/N (Cr02) DOLBY oft DOLBYB DOLBYC Input sensltivlty LINE IN Output level LINE OUT Power consumption Dimenslons(WxHxD) Welght 56dB(AWTD,

2、 signallevel: MOL) 66dB(CCIR) 74 dB (CCIR) 250 mV 400 mV 14W 230 x110 x279 mm 3.1 kg Notes: 1. Specificatlons are subject to change without notice. 2. Weight and dimensions shown are approximate. vf r) HX Pro headroom extension originated by Bang Olufsen and manufactured under llcense from Dolby Lab

3、oratories Licensing Corporation. DOLBY, the double-D symbol, and HX PRO are trademarks of Dolby Laboratories Licensing Corporation. . h System Tuner/C D player Sound Processor Amplifier Cassette Deelt Speakers SC-CH900 SL-CH900 SH-CH900 SU-CH900 RS-CH900 *SB-CH900 Teclinics (E) area.Made in PAES Vbi

4、BwnoVJaB=J SzyxwvutsrqponmlkjihgfedcbaZYXWVUTSRQPONMLKJIHGFEDCBA AOBQ (8r -H l i ) anotJudlosnse RadioFans.CN 收音机爱 好者资料库 RS-CH900 CONTENTS Page LOCATION OF CONTROL 2 DISASSEMBLYINSTRUCTIONS 3-6 MEASUREMENTSANDADJUSTMENTS 7-9 SCHEMATIC DIAGRAM (Operation/Mechanism Control circuit) 10-12 SCHEMATIC DIA

5、GRAM (Main circuit) 13-16 PRINTED CIRCUIT BOARDS 17-19 WIRING CONNECTION DIAGRAM 20 Page BLOCK DIAGRAM 21,22 COMPUTER CONTROL RECORDING SYSTEM 23 DESCRIPTION OF FL PANEL 24 FUNCTION OF IC TERMINALS 25, 26 REPLACEMENT PARTS LIST 27-30,33, 34, 39 CABINET PARTS LOCATION 31, 32 MECHANISM PARTS LOCATION

6、(DECK 1) 35, 36 MECHANISM PARTS LOCATION (DECK 2) 37, 38 Note: Refer to the service manual for Model No. SU-CH900, Order No. AD9111260C8 for information on ACCESSORIES, INSTALLATION OF THE SYSTEM, CONNECTIONS and PACKAGING. LOCATION OF CONTROL (D Deck1 Deok1 (D Deck1 Deck 2 (D Deck 2 Deck 2 (z) Deck

7、l sensor K3) . c Deck 1 counter reset button (COUNTER RESET) , H X , . Dolby noise reduction button (DOLBY NR) Deck 1 cassette eject button (EJECT) oanf CCRT (computer control record tuning) button (CCRT) Edit speed select button (SPEED) Synchro start button (SYNCHRO START) aoO Record/record standby

8、 button (REC PAUSE) Reverse mode select button (REVERSE MODE) Deck 2 counter reset button q OOeHO-S (COUNTER RESET) . Deck 2 cassette eject button (EJECT) Deck 2 Fast-forward/rewind/tape program sensor buttons (TPS) -15 -10 I DOLBY NR B H I CCRT rEDITn BIAS LEVEL EQ CD X1X2- Deck 1 remote indicator

9、(| R E M O T E | Level meter Deck 2 remote indicator (| R E M O T E |) Deck 1 tape travel direction indicators () Deck 1 playback indicator (PLAY) Deck 1 tape indicator Deck 1 tape counter Dolby noise reduction indicators (DOLBY NR B, C) A:.SK () CCRT indicator CD edit indicator (EDIT CD) Edit speed

10、 indicators (EDIT X1, x2) Reverse mode indicators ( , C t , CO) Deck 2 tape counter Deck 2 playback indicator (PLAY) Deck 2 tape indicator Recording indicator (Q) mstsvft Deck 2 tape travel direction indicators () - 2 - RadioFans.CN 收音机爱 好者资料库 DISASSEMBLY INSTRUCTIONS RS-CH900 ATTENTION SERVICER Som

11、e chassis components may have sharp edges. Be careful when disassembling and servicing. Ref. No. 1 Procedure 1 Removal of the Side Ornaments (L), (R) and Cabinet Removal of the Side Ornaments (L), (R). Remove the side ornaments (L), (R) in the direction of arrow 0. Removal of the Cabinet.zyxwvutsrqp

12、onmlkjihgfedcbaZYXWVUTSRQPONMLKJIHGFEDCBA i 1. Remove the 6 screws(0). 2. Remove the cabinet in the direction of arrow . Side ornament (L) Side ornament (R) Ref. No. 2 Procedure 1 2 Removal of the Front Panel Assy g :j H Front panel assy tieod 1. Remove the 2 screws (O. ) 2. Remove the 2 screws (,).

13、 3. Remove the front panel assy in the direction of arrow. Ref. No. 3 Procedure 1 -2 3 Removal of the Mechanism Control P.C.B. CN4 CN3 CN1 CP3 1. Remove the 3 connectors (CP1, CP2, CP3). 2. Remove the 4 flat cable (CN3, CN4, CN5, CN6). 3. RemovetheF.P.C. (CN1). 4. Remove the 2 screws (O,). Push the

14、top of the connector and then pull out the flat cable. (CN3, CN5) 1. Lift up the connector. 2. Pull out the flat cable. (CN4, CN6) Lift the top of tVie connector and then pull out the F.P.C. board. (CN1) Flat cable -Flatcable F.P.C. Connector Connector board Mechanism control P.C.B. Claws 5. Move th

15、e Mechanism P.C.B. in the direction of the arrows and , and then remove the claws. - 3 - RadioFans.CN 收音机爱 好者资料库 RS-CH900 Ref. No. 4 Removal of the Main P.C.B. Ref. No. 5 Removal of the Front Panel Assy Procedure 125 Sv. r Front panel a s s Main P.C.B. I R e m o v e the 5 screws(0) Eject button 1. P

16、ull out the eject buttons ( D E C K 1, D E C K 2). Front panel 3. R e m o v e the F . P . C . ( C N I ) . 4. P u s h the claw in the direction of arrow , and then remove the front panel in the direction of arrow . 2. Push the panel lever in the direction of the arrow , and then open the front panel

17、assy. Ref. No. 6 Procedure 125-6 Removal of the Operation P.C.B. Of f Front panel cover Operation P.C.B Claw , . , Claw , . -,. 1. R e m o v e 6 screws(0)- ji- - R e m o v e the operation P.C.B. in the direction of arrow . 2. R e m o v e 2 claws. 3. R e m o v e the front panel cover in the direction

18、 of arrow . Tim? O * O ; - P H . K i i ar. -O - 4 - RS-CH900 Ref. No. 7 Removal of the Mechanism Unit Ref. No. 8 Removal of the Eject Rod / 3 (DECK 1 and DECK 2) Procedure 1 2 3 7 Mechanism unit Claw Remove the 5 claws. Ref. No. 9 Procedure 1 2 - 3 7- 8 9 Removal of the Eject (A) and Eject (B) Eject

19、 lever (A) Eject lever (B) 1. Removethe2screws(0, ) 2. Pull out the eject lever (A) and eject lever (B). Main P.C.B. 1. Reinstall the front panel assy to the main P.C.B. 2. Reinstall the rear panel to the main P.C.B. 3. Connect the G.N.D. terminal to the rear panel by the lead wire. 4. Check the mai

20、n P.C.B. as shown in the figure. Procedure 1-23-78 Cassette holder (DECK 2)- Eject rod (DECK 2) Eject rod (DECK 1) Claws 7 - 8 9 1 0 Removal of the Cassette Holder Assy (DECK 1 and DECK 2) Cassette holder assy (DECK1) Cassette holder assy (DECK 2) Holder shaft 1. Pull out the holder shaft. OA .Hifi

21、3 O IH 1 2. Push the rib in the direction of arrow and then remove the cassette holder assy. - 5 - RS-CH900 Ref. No. 12 Procedure 1112 Check the Mechanism Control P.C.B. Mechanism control P.C.B. I V itjr:zyxwvutsrqponmlkjihgfedcbaZYXWVUTSRQPONMLKJIHGFEDCBA Lji ta u. Mechanism control P.C.B. Main P.C

22、.B. 1. Remove the 2 screws (O. ) 2. Move the Mechanism control P.C.B. in the direction of the arrows and (D, and then remove the claws. 3. Reinstall the mechanism control P.C.B. to the main P.C.B. 4. Check the mechanism control P.C.B. as shown in the figure. Ref. No. 13 Check the Operation P.C.B. =.

23、C. board CN1 Main P.C.B. Mechanism control P.C.B. Operation P.C.B. 1. ConnecttheF.P.C. board (CN1). Note: Make sure not to damage the F.P.C. board. 2. Reinstall the mechanism control P.C.B. to the main P.C.B. 3. Check the operation P.C.B. as shown in the figure. - 1 urmzyxwvutsrqponmlkjihgfedcbaZYXW

24、VUTSRQPONMLKJIHGFEDCBAV swoiifi wii;to noiJsent er n. srii evonu:.- - 6 - RS-CH900 MEASUREMENTS AND ADJUSTMENTS This tape decl (RS-CH900) is powered by the amplif ier (SU-CH900). j _ To adjust or checl operations on the tape decl Playback gain adjustment (315Hz, OdB); QZZCFM Overall frequency respon

25、se. Overall gain adjustment Normal reference blank tape ; QZZCRA CrOj reference blank tape; QZZCRX Metal reference blank tape; QZZCRZ - 7 - RS-CH900 HEAD AZIMUTH ADJUSTMENT (DECK 1/2) 1. Playback the azimuth adjustment portion (8kHz, -20dB) of the test tape (QZ2CFM). Vary the azimuth adjusting screw

26、 until the outputs of the L-CH and R-CH are maxinnized and the lissajous waveform, as illustrated, approaches O degrees. Nole: If L-CH and R-CH are not maximized at the same poInt, adjust to the point where the levels of each channel are maximized and equal. 2. Perform the same adjustment in the pla

27、y mode. 3. After the adjustment, apply screwlock to the azimuth adjusting screw. (Lch) 0 * i- - -3 M 1 O O Osciiioscope l M( R c h ) Fig. 1 F H P A n m F C K ? ! R/P. H E AD (DECK-2) E. H E AD (D E C K 2) p. H E AD (D E C K 1) n rr irt n Azimuth Screw (Forward) Azimuth Screw (Reverse) Fig. 2 TAPE SP

28、EED ADJUSTMENT (DECK 1/2) . Normal speed 1. Shift the edit-recording tape-speed selector to NORMAL. 2. Playback the middle portion of the test tape (Q2ZCWAT). 3. Adjust Deck 1=VR801 and Deck 2=VR802so that the output is within the Standard value. Standard value: 300015 Hz (NORMAL speed) High speed S

29、et the unit to forward (FWD) mode. 4. Push the edit speed button (X2). This will set the high speed mode. 5. Playback the middle portion on the test tape (QZZCWAT). 6. At that time, check if the output from DECK 1 is within the Standard value. Standard value: 6000630 Hz (HIGH speed) 7. Adjust VR803

30、so that the output frequency of DECK 2 is within 30 Hz of the value of the output frequency of DECK 1. / 0 J III III O 0 t. Digital trequency counier Fig. 3 PLAYBACK GAIN ADJUSTMENT (DECK 1/2) 1. Playback the gain adjusted portion (315Hz, OdB) of the test tape (QZZCFM). 2. Adjust Deck 2=VR3 (L-CH) V

31、R4 (R-CH) and Deck 1 =VR1 (L- CH) VR2 (R-CH) so that the output is within the Standard value. Standard value: 4 0 0 mV 0 .5 dB l(Lch) |(Rch) 0 jf Fig. 4 PLAYBACK FREQUENCY RESPONSE (DECK 1/2) 1. Playback the frequency response portion (315 Hz, 12.5kHz63Hz, -20dB) of the test tape (QZZCFM). 2. Assure

32、 that the frequency response is within the range shown in Fig. 6 for both L-CH and R-CH. |(Lch) 7t EVM l(Rch) Fig. 5 63H2 lOOH! ZOOMI | 500Hz 315HJ IkHz 2kHz 4kHz tZ.SkHz 8kHz Fig. 6 - 8 - 1 RS-CH900 ERASE CURRENT CONFIRMATION ( D E C K 2) 1. Insert the Metal blank test tape (QZZCRZ) and set the uni

33、t to the Record Pause mode. 2. Check if the output at this time betwen the erase current confirmation point HJJjJI and KtjlM (chassis) (the output on both edges of R327) is within the standerd value. Standard value: 220 mA25 mA (Metal) ERASE HEAD TP301 -AMr- R327 Fg. 7 TT ;EVM (Electronic Voltmeter)

34、 OVERALL FREQUENCY RESPONSE (DECK 2) 1. Insert the Normal blank test tape (QZZCRA) and set the unit to the Record Pause mode. 2. Apply 8 reference input signal (1 kHz, -36 dB and 10 kHz, -36 dB) through an attenuator. 3. Record the frequency sweep. 4. Playback the recorded signal and assure that it

35、is within the range shown in FIg. 8 in comparison to the reference frequency (1 kHz). 5. Repeat steps 26 above using the CrOj tape (QZZCRX) and the Metal tape (QZZCRZ) increasing the frequency range to 12.5kHz (50Hz12.5kHz). 6. Assure that the level is within the range shown in FIg. 9. LINE IN UNE O

36、UT EVM OSCJIIOSCOM FIg. 10 Normal Overall frequency response chart (NR OUT) + 6()B + 4(18 + 2(18 O dB zyxwvutsrqponmlkjihgfedcbaZYXWVUTSRQPONMLKJIHGFEDCBA -2IOOJI Grid assignment - | S |0.| |rzyxwvutsrqponmlkjihgfedcbaZYXWVUTSRQPONMLKJIHGFEDCBA n n m ; aoaao oooao ooaoo 1 ooo a O FLAY O 2G S70 (R) S

37、3 SI S2 S3 S4 S5 S6 S7 S8 SI 1,5G naiiD. /0/5Q nffadck I a Djb mO Dji t(D D /aaaaa /naaaa /aaaaa la O, j/o D)i J a a f D al O ar a d QOL k , r 1,2,4, 5G Pin connection Pin No. 4 5 4 4 4 3 4 2 4 1 4 0 3 9 3 3 7 3 6 3 5 3 4 3 3 3 2 3 1 3 0 2 9 2 8 2 7 2 6 2 5 2 4 2 3 2 2 2 1 2 0 1 9 t 8 1 7 1 6 1 5 1

38、4 t 3 1 2 1 1 1 0 9 8 7 E 5 4 3 2 1 P P P P P P P p P P P P P P Connection F F N N P P P P P P P P P 1 1 1 1 N N N N N N N N 1 I 1 1 1 2 2 2 2 5 4 3 2 1 N N F F 1 1 P P 1 2 3 4 5 6 7 8 9 0 1 2 3 4 C C P P P P P C 5 e 7 8 9 0 1 2 3 G G G G G G P P 2 2 Anode connection 6G 5G 4G 3G 2G IG PI BI a a Q a

39、a P2 B2 b b Q b b P3 83 c c DOLBY NR c c P4 84 d d d d P5 85 e e CU) e e P6 86 f f cx: f f P7 87 g g - g g P8 88 - - P9 B9 S5 h CCRT h S5 PIO 810 S6 j BIAS i S6 P U 811 S9 j L E V E L j S9 PI2 BI2 S8 k EO k S8 PI3 BI3 S3 - S. S3 PI4 814 S4 m - m S4 P15 815 S7 n - n S7 P16 816 S2 - - S2 P17 817 S I 0

40、 EDIT 0 S I PIS 818 1 REMOTE P CD P REMOTE PI9 819 t I _ _l -1 -24- RS-CH900 FUNCTION OF IC TERMINALS IC801 (M50963-405FP) Pin No. Terminal name i/0 Function 1 2 S/P-DATA 2 S/P-DATA 1 0 Serial data signal output 3 S/P-CLK 0 Serial clock signal output 4 - 6 NC, NC, VRIN Not used (connect to GND) 7 AT

41、LS 1 REC/PLAYBACK detection signal input 8 QUICK2 1 Leader tape detector signal input (DECK 2) 9 QUICK1 Not used (connect to GND) 10 TEST 1 Test terminal 11 MSP 1 TPS signal input 12 13 14 15 S-RDY S-CLK S-OUT S-IN 1 0 0 1 Serial data and serial clock signal input/output 16 17 18 19 B-CLK IN B-CLK O

42、UT B-DATA IN B-DATA OUT 1 0 1 0 Data bass signal input/output 20 POWER OFF 1 Power off detector signal input 2 1 - 23 NC Not used 24 CNVss 1 Connect to GND 25 RESET 1 Reset signal input 26 27 XIN XOUT 1 0 Ceramic oscillator connection terminal (4 MHz) 28 0 Not used 29 Vss 1 GND 30 MATAL-2 SW 1 Metal

43、 tape position detector signal input (DECK 2) 31 F. INH2-SW 1 Forward side record prevention tad detection signal input (DECK 2) 32 NOR 2-SW 1 Normal tape position detector signal input (DECK 2) 33 R. INH 2-SW 1 Reverse side record prevention tad detection signal input (DECK 2) 34 HALF 2-SW 1 DECK 2

44、 cassette half detection signal input 35 MODE 2-SW 1 DECK 2 operation mode signal input 36 N0R1-SW 1 Normal tape position detector signal input (DECK1) Pin No. Terminal name 1/0 Function 37 HALF1-SW 1 DECK 1 cassette half detection signal input 38 NC Not used 39 M0DE1-SW 1 DECK 1 operation mode sign

45、al input 40 PB 2 0 Playback AMP control signal (selectore of input/output control signal) output 41 120/70 MS 0 Playback E.Q. AMP control signal output 42 X2 EO 0 Playback E. Q AMP control signal output 43 NC Not used (connect to GND) 44 LMT 0 Line out muting control signal output 4 5 - 54 Not used

46、(connect to GND) 55 NC Not used (open) 56 RLP2 1 DECK 2 rotation pulse signal input of reel table 57 RLP1 1 DECK 1 rotation pulse signal input of reel table 58 SPEED 2 0 DECK 2 tape speed control signal output 59 SPEED 1 0 DECK 1 tape speed control signal output 60 SOL 2 0 Plunger control signal out

47、put 61 MOTOR 2 0 DECK 2 motor control signal output 62 MOTOR 1 0 DECK 2 motor control signal output 63 S0L1 0 Plunger control signal output 64 NC Not used (open) 65 Vss 1 Ground 66 NC Not used (open) 67 Vcc 1 Power Supply 68 AVss Not used (connect to GND) 69 VREF Reference voltage input 70 D-A Not u

48、sed (open) 71, 72 PWM NC Not used (connect to GND) - 2 5 - RS-CH900 IC901 (M50940-333FP) Pin No. Terminal name 1/0 Function 1 SIS-L 1 S-Meter signal input 2 KEY2 1 DECK 2 key control signal input 3 KEY1 1 DECK 1 key control signal input 4 NC Not used (open) 5 - 7 NC Not used (connect to GND) 8-12 G6-G2