Pioneer-CT1270WR-tape-sm 电路图 维修手册.pdf

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1、Sevice cTVlanual REPAIR ( a i 3 ) 4 2 0 - 5 7 0 0 PIONEER ELECTRONIC (EUROPE N.V. K e e t b e r g l a a n 1 , 2 7 4 0 B e v e r e n , B e l g i u m T E L ; 0 3 / 7 7 5 - a a O B PIONEER ELECTRONICS AUSTRALIA PTY. LTD. 1 7 B - 1 B 4 B o u n d a r y R o a d , B n a e s i d e . V i c c o n a 3 1 3 5 ,

2、A u s c r a l i a T E L ; (OS) 5 8 0 - 3 9 1 1 Y l MAR. 1986 Printed in Japan _ RadioFans.CN 收音机爱 好者资料库 I C T - 1 2 - 7 0 W R C B K J 1. SAFETY INFORMATION 1. SAFETY PRECAUTIONS The following check should be performed for the continued protection of the customer and service tech- nician. LEAKAGE CUR

3、RENT CHECK Measure leakage current to a known earth ground (water pipe, conduit, etc.) by connecting a leakage current tester such as Simpson Model 229-2 or equivalent between the earth ground and all exposed metal parts of the appli- ance (input/output terminals, screwheads, metal overlays, control

4、 shaft, etc). Plug the AC line cord of the appliance directly into a 120V AC 60Hz outlet and turn the AC power switch on. Any current measured must not exceed O.BmA. Leakage current tester Reading should not be above O.BmA Test all exposed metal surfaces 2-wire cord Also test with plug reversed (Usi

5、ng AC adapter plug as required) l Earth ground ANY MEASUREMENTS NOT WITHIN THE LIMITS OUTLINED ABOVE ARE INDICATIVE OF A PO- TENTIAL SHOCK HAZARD AND MUST BE COR- RECTED BEFORE RETURNING THE APPLIANCE TO THE CUSTOMER. 2. PRODUCT SAFETY NOTICE Many electrical and mechanical parts in the appliance hav

6、e special safety related characteristics. These are often not evident from visual inspection nor the protection afforded by them necessarily can be obtained by using replacement components rated for voltage, wattage, etc. Replacement parts which have these special safety charac- teristics are identi

7、fied in this Service Manual. Electrical components having such features are identified by marking with a .L on the schematics and on the parts list in this Service Manual. The use of a substitute replacement component which dose not have the same safety characteristics as the PIONEER recommended rep

8、lacement one, shown in the parts list in this Service Manual, may create shock, fire, or other hazards. Product Safety is continuously under review and new instructions are issued from time to time. For the latest Information, aiways consult the current PIONEER Service Manual. A subscription to, or

9、additional copiesof, PIONEER Service Manual may be obtained at a nomina! charge from PIONEER. AC Leakage Test 6 RadioFans.CN 收音机爱 好者资料库 C T - 1 2 - 7 0 W R C B K 2. SPECIFICATIONS Systems 4 track, 2-channel stereo Heads Hard Permalloy recording/playback head x 1 Hard Permalloy playback head x 1 Ferr

10、ite erasing head x 1 Motor DC servo capstan motor x 2 Wow and Flutter No more than 0.07% (WRMS) No more than 0.19% (DIN) Fast winding Time Approximately 110 seconds (C-60 tape) Frequency Response -20 dB recording: Normaltape 20 to 15,000 Hz Chrometape 20 to 15,500 Hz Metal tape 20 to 16,000 Hz O dB

11、recording: Normaltape 20 to 10,000 Hz Chrometape 20to 11,000 Hz Metal tape 20 to 15,000 Hz Signal-to-Noise Ratio Dolby NR OFF More than 57 dB Noise Reduction Effect Dolby NR B type ON More than 10 dB (at 5 kHz) Dolby NR C type ON More than 19 dB (at 5 kHz) Harmonie Distortion No more than 0.7% (O dB

12、) Input (Sensitivity) LINE (INPUT) 70 mV (Input impedance 100 kS) Output (Reference level) LINE (OUTPUT) 316 mV (Output impedance 3.9 kQ) HEADPHONES 45 mV (Load impedance 8 ) Subfunctions Relay playback (Deck I Deck II) Synchronized copy start High-speed and normal-speed tape copying (Deck I Deck II

13、) Dolby NR B/C types Auto tape selector (Deck I) 5 segments/channel LED level meter Music Scan (Cue and Review) (Deck 1) - . . . . Full automatic stop tunction Timer stand-by function 0 3 -zyxwvutsrqponmlkjihgfedcbaZYXWVUTSRQPONMLKJIHGFEDCBA S (Unattended recording: Deck II) (Wake-up playback: Deck

14、I and Deck II) One-Touch recording * 3-digit mechanical tape counter Miscellaneous Power Requirements U.S., Canadian models AC 120 V, 60 Hz European model AC 220 V, 50/60 Hz U.K. model AC 240 V, 50/60 Hz U.S. military, other destination models AC 120 V/220 V/240 V, 50/60 Hz (switchable) Power Consum

15、ption U.S., Canadian models 18 W European, U.K. models 21 W U.S. military, other destination models 16 VV Dimensions 420 (W) x 115 (H) x 262 (D) mm 16-9/16(W) x4-1/2(H) x 10-5/16(D) in Weight (without package) 5 kg (111b) Accessories Operating instructions 1 Connection cord with pin plugs 2 NOTE: Sp

16、ecifications and design subject to possible modifications without notice due to improvements. ! 3 RadioFans.CN 收音机爱 好者资料库 C T - 1 2 - 7 0 W R C B K 3 TAPE SELECTORzyxwvutsrqponmlkjihgfedcbaZYXWVUTSRQPONMLKJIHGFEDCBA I switches Tape counter RESET button Deck II TAPE COUNTER | Three-digit counter indi

17、cates the current position on the tape in ; Deck II. I The selectors allow the bias and equaiization characteristics during recording, and equaiization characteristics during playback, to be selected on Deck II in accord with the type of tape used. Normal tape: Release the left-hand switch to the ou

18、t position ( M. NORM). CrOj tape: Press the left-hand switch and set it to the in position ( HIGH) and rease the right-hand switch to the out position ( M CrO;). Metal tape: Press both the left and right-hand switches to the in position ( m HIGH, .METAL). A/O ff; Deck I is provided witli an automati

19、c tape selector mechanism. Deck I (for playback) Deck II (for playback/recording) - M i 1 lEITT PHONES jack DOLBY B-C NR switches Make sure that the switch is set to the same setting when playing back tapes recorded with the Dolby B or C type noise reduction system. Dolby NR OFF: Release the left-ha

20、nd switch to the out position (zyxwvutsrqponmlkjihgfedcbaZYXWVUTSRQPONMLKJIHGFEDCBA M. OFF). Dolby B-type NR ON: Press the left-hand switch and set it to the in position I ON) and release the right-hand switch to the out position ( M. B). Dobly C-type NR ON: Press the left and right-hand switches to

21、 the in position ( m. ON, mt C). Noise reduction manufactured under cense from Dolby Laboratories Licensing Corporation. Dolby and the double-D symbol are trademarks of Dolby Laboratories Licensing Corporation. B C T - I S T O W R C B K : 4. DISASSEMBLY 4.1 Removal of the Bonnet. 1. Remove the three

22、 screwszyxwvutsrqponmlkjihgfedcbaZYXWVUTSRQPONMLKJIHGFEDCBA Q and remove the bonnet. Bonnet Fig. 4-1 Removal of the bonnet 4.2 Removal of the Mechanica! Unit 1. Remove the three screwszyxwvutsrqponmlkjihgfedcbaZYXWVUTSRQPONMLKJIHGFEDCBA Q and take off the top plate. Top plate Fig. 4-2 Removal of the

23、 top plate. 2. Remove the switch lever and SW connector spring from DECK 2 (RYM-203). DECK II DECKI .y-A .y-A a Fig. 4-3 Removal of the SW connector spring 3. Remove the 5 screws Q and take off the front panel. 0. Fig. 4-4 Removal of the front panel 4. Pass the counter belt from the counter around a

24、 boss in DECK 2. Remove the eight screws Q . If there is difficulty in removing screws, first take off the connector and remove the front panel. Counter belt plate boss. O O O O Fig. 4-5 Removal of the mechanical unit 4.3 Belt Replacement Procedure. 1. First remove the mechanical unit from the main

25、body. (See 4-2 for removal of the mechanical unit). 2. Remove the angular belt (FR belt) from the machanical unit. 3. Remove the single screw Q . Remove the REC SW bracket. (DECK 2 RYM-203) only). EC SW Bracket Capstan motor Fig. 4-6 Removal of the REC SW Bracket 7 C T - 1 2 - 7 0 W R C B K 3 t 4. R

26、emove the 3 side screwszyxwvutsrqponmlkjihgfedcbaZYXWVUTSRQPONMLKJIHGFEDCBA Q . Remove the motor bracket from the mechanical chassis. Motor Motor bracket Fig. 4-7 Removal of the motor bracket Note: Make sure that the positions of the motor and motor pulley (H) are as shown in the figure below. Motor

27、 pulley (H) / E ? E Capstan motor Fig. 4-10 Diagram showing the positions of the motor and motor pulley (H) 5. Replace the belt. Procedure is the reverse of removal. Note: For DECK 1 (RYM-202), Item 3 is shortened. Drive belt (H) mm Fig. 4-8 Replacement of the drive belt (H) 4.4 Motor replacement pr

28、ocedure. 1. Remove the mechanical unit from the main body. (See 4-2 for removal of the mechanical unit) 2. Remove the motor bracket from the mechanical chassis. (See 4-3. Belt replacement procedure). 3. Remove the motor lead by using a soldering iron. , Motor Soldering iron Fig. 4-9 Removal of the m

29、otor lead 4. Remove the three screws Q . Remove the motor from the from the motor bracket and replace. Fig. 4-11 Replacement of the motor 5. Assembly is carried out in reverse order to disassembiy. (Make sure that the motor has the correct orientation on installation). 6. Carry out tape speed adjust

30、ments. (See 11-3 Tape speed adjustments) - ; Motor Motor Yellow Red DECK I (RYM-202) Orenge Green Gray Purple Blue DECK II (RYM-203 Fig. 4-12 Motor P.C.B wiring diagram C T- i a 7 0 W R C B K : 4.5 Head Replacement Procedure. 1. Remove the mechanical unit from the main body. 2. Remove each knob from

31、 the mechanical unit. Knob Button bracket Note: There is a spring attached to part If this spring is re- leased, re-insertion can be extremely difficult so avoid removal of the button bracket from the mechanical unit. Fig. 4-13 Removal of the knobs 3. Remove the wire band (Monofilament) from the hea

32、d lead. Wire band. (Monofilament). Head P.C.B. Fig. 4-14 Removal of the wire hand (Monofilament) 4. Remove the head lead from the head P.C.B. with a soldering iron. Soldering iron Head P.C.B. Head lead wires Fig. 4-15 Removal of the head lead 5. Remove the two screwszyxwvutsrqponmlkjihgfedcbaZYXWVUT

33、SRQPONMLKJIHGFEDCBA Q which secure the rotary head assembly to the head chassis assembly. Rotary head assembly Head chassis assembly Fig. 4-16 Removal of the rotary head assembly 9 C T - 1 2 7 a W R C B K 3 6. Slide the head chassis forward with a finger. Rennove the rotary head assembly and replace

34、. Fig. 4-17 Head replacement procedure 7. Assemble in reverse order to disassembly. (Note the orientation of the rotary head assembly). From the head. White, Red, Blue, Green. DECK I (RYM-202) head P.C.B. From the head. Brown, Yellow, White, Red, Blue, Green! DECK II (RYM-203) head P.C.B. Fig. 4-18

35、Head P.C.B wiring diagram 1 O C T - 1 2 7 0 W R C B K 3 5. PARTS LOCATION NOTES: ThezyxwvutsrqponmlkjihgfedcbaZYXWVUTSRQPONMLKJIHGFEDCBA A, mark found on some component parts indicates the importance of the safety factor of the part. Therefore, when replacing, be sure to use parts of identical desig

36、nation. For your Parts Stock Control, the fast moving items are indicated with the marks * and *. * GENERALLY MOVES FASTER THAN This classification shall be adjusted by each distributor because it depends on model number, temperature, humidity, etc. Parts marked by are not always kept in stock. Thei

37、r delivery time may be longer than usual or they may be unavailable. Front Panel View Door panel R RAH-830 Mode knob RAC-724 Door panel L RAH-829 Knob (POWER) RAC-682 Stop button (EJECT/STOP) RAC-719 Play button (PLAY RAC-721 REW button (FAST) RAC-722 FF button (FAST) RAC-723 Direction knob (DIRECTI

38、ON) RAC-725 Stop button (EJECT/STOP) RAC-719 RC button (REC) RAC-720 Play button (PLAY) RAC-721 REW button (FAST) RAC-722 FF button (FAST) RAC-723 Mode knob (MODE) RAC-724 VR knob (REC LEVEL) RAC-680 Front panel assembly RXX-538 Front panel Display panel RAH-834 Function panel R AH-836 Tape knob (TA

39、PE SELECTOR) RAC-726 Dolby knob (DOLBY-B-C NR) RAC-728 Dolby knob (DOLBY OIM/OFF) RAC-732 Headphone jack RKN-096 Speed knob (COPY SPEED) Copy knob (TAPE COPY) RAC-729 Relay knob (RELAY) RAC-731 Mute knob (MUTE) RAC-727 Direction knob (DIRECTION) RAC-725 Pause button (PAUSE) RAC-718 1 1 C T - 1 S 7 0

40、 W R C B K 3 Rear Panel View Terminal (LINE) RKB-020 Rear panel AC power cord R DG-064 Top View Fuse (FU1: 1.25A, 20mm REK-073 * Power transformer (Tl RTT-462 (Wotor RXM-145 Main unit 1 2 C T - i a - 7 0 W R C B K ) NOTES: Parts without part number cannot be suppUed. The mark found on some component

41、 parts indicates the importance of the safety factor of the part. Therefore, when replacing, be sure to use parts of identical designation. For your Parts Stock Control, the fast moving items are indicated with the marks * and *. * GENERALLY MOVES PASTER THAN * This classification shall be adjusted

42、by each distributor because it depends on model number, temperature, humidity, etc. Parts marked by are not always kepl in stock. Their delivery time may be longer than usual or Ihey may be unauailable. Part List of Exploded View (Exterior Components) Mark No. Part No. Description Mark No. Part No.

43、Description 1 RDG-064 AC Power cord 36 RAH-833 Knob plate 2 REK-073 Fuse (FU1: 1.25A 20mm) 37 RAH-834 Display panel 3 RTT-462 Power transformer (Tl) 38 RAH-835 Mode panel 4 RBK1001 Harf pressure spring i 39 RAH-836 Function panel 5 RBL-222 Door spring ,. i 40 REC-371 Binder 6 RBL-181 Switch rod spri

44、ng 41 RNA-806 Bonnet 7 REB-555 Counter belt 42 RXX-538 Front panel assembly 8 REC-436 Door damper 43 BBZ30P080FMC Screw 9 RAC-680 Knob (VR) 44 BBZ26P060FMC Screw 10 RAC-682 Knob (POWER) 45 PBZ20P060FZK Screw 11 RAC-718 Pause button (PAUSE) 46 ABZ30P080FIV1C Screw 12 RAC-719 Stop button (STOP) 47 YE3

45、0FUC E-rjng 13 RAC-720 REC button (REC) 48 PMA30P060FMC Screw 14 RAC-721 Play button (PLAY) 49 WT42D070D013 Washer 15 RAC-722 REW button (REW) IQt Earth lead assennbly 16 RAC-723 FF button (FF) T(W Mechanism assembly 17 RAC-724 (Vlode knob (MODE) 103 Mechanism assembly 18 RAC-725 Direction knob 104

46、Knob shaft 19 RAC-726 Tape knob (TAPE) 105 Main chassis 20 RAC-727 Mute knob (MUTE) 106 Top stay 21 RAC-728 Dolby knob 107 LED Holder A (DOLBY B-C NR) 108 VR knob guide 22 RAC-729 Copy knob (COPY) 109 Rear panel 23 RAC-730 Speed knob (COPY SPEED) 110 Rod spring 24 RAC-731 Relay knob (RELAY) 25 RAC-7

47、32 Dolby knob 111 Select lever 112 REC select bracket ass 26 RAW-221 Counter 113 Main unit 27 REB-513 Stopper 114 Sub unit 28 REC-435 Leg assembly 115 Headphone unit 29 R E E H 3 Remain display paper 116 Display unit 30 RNM-186 Door 117 Power switch unit 118 Jack unit 31 RAH-804 Power panel 119 Door

48、 display unit 1 32 RAH-829 Door panel (L) 120 Door dispaly unit 2 33 RAH-830 Door panel (R) 121 Transistor unit 34 RAH-831 Door plate (L) 35 RAH-832 Door plate (R) 1 3 Parts List of Tape Trensport Unit (Deck li: side) Mark No. Part No. Description Mark No. Part No. Description 1 RSN-040 Leaf switch (SI502, SI 503 REC) 56 RBL-209 Shift arm SP 2 RSN-042 Leaf switch (S1501 PLAY) 57 RBL-210 Shift arm R-SP (B) 3 RXC-173 R-Head assembly 58 RBL-211 G lock arm (P) SP- 4 R BA-098 Azimuth screw 59 RBL-2