Jvc-KVV-8-Service-Manual 电路图 维修手册.pdf

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1、MOBILE VIDEO CASSETTE PLAYER No.49625 Feb. 2001 COPYRIGHT 2001 VICTOR COMPANY OF JAPAN, LTD. KV-V8 Area Suffix E J Continental Europe North America Contents q Specifications q CAUTION q Instructions 1. DISASSEMBLY 1.1 Disassembly flow chart 1-1 1.2 How to read the disassembly and assembly 1-1 1.3 Di

2、sassembly/assembly method 1-1 1.4 Service position 1-4 1.5 Mechanism service mode 1-4 1.6 Emergency display function 1-5 2. MECHANISM ADJUSTMENT 2.1 Before starting repair and adjustment 2-1 2.2 Replacement of major parts 2-4 2.3 Installation of major parts (Mechanism phase alignment) 2-9 2.4 Mechan

3、ism timing chart 2-11 2.5 Compatibility adjustment 2-12 3. ELECTRICAL ADJUSTMENT 3.1 Precaution 3-1 3.2 Servo circuit 3-1 5. PARTS LIST 5.1 PACKING AND ACCESSORY ASSEMBLY 5-1 5.2 FINAL ASSEMBLY 5-2 5.3 MECHANISM ASSEMBLY 5-4 5.4 ELECTRICAL PARTS LIST 5-6 . . . . . . . . . . . . . . . . . SERVICE MAN

4、UAL KV-V8 ItemKV-V8EKV-V8J Signal systemPALNTSC Area ContinentalEuropeU.S.A. Comparison table RadioFans.CN 收音机爱 好者资料库 Specificatios (KV-V8J) General Power supply: DC12 V (11V-16V allowable)Negative ground Dimensions: 259 mm x 94 mm x 270 mm (10-1/4x 3-3/4x 10-11/16) (width x height x depth) Mass: 3.

5、2 kg (7.1 lbs) Allowable working temperature: 0 C to +40 C (32 F to104 F) Allowable relative humidity: 35%to 80% Allowable conservation temperature: -20 C to +60 C (-4 F to 140 F) Video Playback system: VHS format,Hi-Fi 4-heads helical scan Video signal: VHS NTSC standard Audio Playback system: VHS

6、stereo Hi-Fi audio Audio track: 2 Hi-Fi audio channels and 1 normal audio channel Remote control unit: A code (A code and B code are switchable automatically in the main unit.) Design and specifications subject to change without notice. Specificatios (KV-V8E) General Power supply: DC12 V (11V-16V al

7、lowable)Negative ground Dimensions: 259 mm x 94 mm x 270 mm (width x height x depth) Mass: 3.2 kg Allowable working temperature: 0 C to +40 C Allowable relative humidity: 35%to 80% Allowable conservation temperature: -20 C to +60 C Video Playback system: VHS format,Hi-Fi 4-heads helical scan Video s

8、ignal: VHS PAL standard Audio Playback system: VHS stereo Hi-Fi audio Audio track: 2 Hi-Fi audio channels and 1 normal audio channel Remote control unit: A code (A code and B code are switchable automatically in the main unit.) Design and specifications subject to change without notice. !CAUTION Bur

9、rs formed during molding may be left over on some parts of the chassis. Therefore, pay attention to such burrs in the case of preforming repair of this system. RadioFans.CN 收音机爱 好者资料库 1-1 1Top coverD12(S1a), (S1b), 2(S1c) 2SW board assembly,D22(S2a), (WR2a), stay Front panel assembly4(L2a), 3(L2b),

10、CN3006(WR2b) 3Cassette housingD3a, 2(S3a), 2(L3a) assemblyD3b 4Drum assemblyD4 CN1(WR4a), CN1(WR4b), (S4a), (S4b), (S4c) 5Mechanism assemblyD5 CN1(WR5a), CN3003(WR5b), CN3005(WR5c), 2(S5a), (S5b), 2(L5a) 6Main board assemblyD6 (S6a), (S6b) SECTION 1 DISASSEMBLY 1.3 Disassembly/assembly method 1.1Dis

11、assembly flow chart This flowchart lists the disassembling steps for the cabinet parts and P.C. boards in order to gain access to item(s) to be serviced. When reassembling, perform the step(s) in reverse order. Bend, route and dress the flat cables as they were originally laid. 1.2 How to read the d

12、isassembly and assembly Be careful not to damage the connector and wire etc. during connec- tion and disconnection. When connecting the wire to the connector, be careful with the wire direction. When reattaching the Front panel assembly, make sure that the door opener “a” of the Cassette housing ass

13、embly is lowered in position prior to the reinstallation. When installing the Cassette housing assembly, make sure that the Control cam and the Main deck alignment holes are aligned. if they are not, rotate the Loading motor belt to the front align the holes. When installing the Cassette housing ass

14、embly, be careful not to dam- age the parts of the Main board and Mechanism assemblies. When removing the Mechanism assembly only, unhook the two spacers connecting it with the Main board assembly with pliers from the back side of the Main board assembly first, and then remove the Mecha- nism assemb

15、ly. When reattaching the Mechanism assembly to the Main board as- sembly, take care not to damage the sensors on the Main board as- sembly. Top cover SW board assembly, Front panel assembly Cassette housing assembly Drum assembly Mechanism assembly Main board assembly 1 2 3 4 5 6 Step/ Loc No. Part

16、Name Fig. No. PointNote Note: The bracketed ( ) WR of the connector symbol are as- signed nos. in priority order and do not correspond to those on the spare parts list. (5) Adjustment information for installation (1)(2)(3)(4)(5) (1) Order of steps in Procedure When reassembling, perform the step(s)

17、in the reverse order. These numbers are also used as the identification (location) No. of parts Figures. (2) Part name to be removed or installed. (3) Fig. No. showing procedure or part location. (4) Identification of part to be removed, unhooked, unlocked, released, unplugged, unclamped or unsolder

18、ed. P= Spring, W= Washer, S= Screw, L= Locking tab, SD= Solder, CN*(WR*)= Remove the wire (WR*) from the connector (CN*). - 1Top coverD14(S1a),(S1b),3(L1a), 2(SD1a), (P1a), CN1(WR1a), Bracket2(S1c) Step/ Loc No. Part Name Fig. No. PointNote RadioFans.CN 收音机爱 好者资料库 1-2 Fig. D2Fig. D3b Fig. D3aFig. D1

19、 Rear side Pinch plate Loading motor belt Control cam Hole align with hole in deck (S3a) (L3a) (L3a) 3 Cassette housing assembly Switch lever REC safety switch (S3a) A (S1a) (S1c) (S1b) (S1c) (S1a) A 1Top cover Detail “G” SW board Chassis Main board CN3006 Front board (L2a) (S2a) (S2a) Stay (L2a) (L

20、2b) CN3006 2Front panel assembly 2SW board assembly WR2b Foil side Door opener “a” WR2a G WR2a WR2b 1-3 Fig. D4 Fig. D6 Fig. D5 Not used Inertia plate 4 Drum assembly (S4b) (L5a) WR4a Supporting tape side WR4b Supporting tape side CN1 Not used (S4a) (S4c) (L5b) CN1 Not used Cleaner assembly Note: Wh

21、en installing the Drum assembly, secure the screws (S4a S4c) in the order of a , b , c . 6Main board assembly (S6a) (S6b) (S5a) (S5b) CN1 WR5a Not used WR4 5 Mechanism assembly WR5c WR5b Red line: CN3003 pin1 CN3005 CN3003 (L5a) Spacer 1-4 Fig. 1-4-1a Main board assembly SW board assembly Front boar

22、d assembly CN3006 CP5001CP5002 CN7001 TP7002 GND TP7001 MECHA TEST TP111 D.FF TP4001 CTL.P TP106 PB FM TP2253 A FM 1.5Mechanism service mode This model has a unique function to enter the mechanism into every operation mode without loading of any cassette tape. This function is called the Mechanism s

23、ervice mode. 1.5.1How to set the Mechanism service mode (1) Unplug the power cord plug from the power outlet. (2) Remove the Front panel assembly and Cassette hous- ing assembly. (Take care not to pull the flat wire.) (3) Connect TPGND and TP7001(TEST) on the Front board assembly with a jump wire. (

24、4) Insert the power cord plug into the power outlet. (5) Turn on the power. When the loading has completed, the mechanism enters the desired mode. 1.4Service position This unit has been designed so that the Mechanism and Main board assemblies can be removed together from the chas- sis assembly. Befo

25、re diagnosing or servicing the circuit boards, take out the major parts from the chassis assembly. 1.4.1How to set the Service position” (1) Refer to the disassembly procedure and perform disas- sembly of the major parts before removing the Cassette housing assembly. (2) Remove the combined Cassette

26、 housing, Mechanism and Main board assemblies. (3) Connect the wires and connectors of the major parts that have been removed in step (1). (Refer to Fig. 1-4-1a.) (4) Place the combined Mechanism and Main board assem- blies upside down. (5) Insert the power cord plug into the power outlet and then p

27、roceed with the diagnostics and servicing of the board assembly. Notes: Before inserting the power cord plug into the power outlet, make sure that none of the electrical parts are able to short-circuit between the workbench and the board assembly For the disassembly procadure of the major parts and

28、details of the precautions to be taken, see “1.3 Disas- sembly/assembly method”. If there are wire connections from the Main board and Mechanism assemblies to the other major parts, be sure to remove them first before performing step (2). When carrying out diagnosis and repair of the Main board asse

29、mbly in the “Service position”, be sure to ground both the Main board and Mechanism assem- blies. If they are improperly grounded, there may be noise on the playback picture or FDP counter display may move even when the mechanism is kept in an in- operative status. In order diagnose the playback or

30、recording of the cas- sette tape, set the Mechanism assembly to the required mode before placing it upside down. If the mechanism mode is changed (including ejection) while it is in an upside down position the tape inside may be damaged. When checking the operation or performing adjust- ments to the

31、 VCP main unit, it is necessary to connect the power cable (Car Cable) to the VCP main unit so that DC power is supplied. Also, when using the re- mote control unit, it is required to connect the IR re- ceiver. (by using either the provided or optional acces- sories) 1-5 1.6Emergency display functio

32、n This unit has a function for storing the history of the past two emergencies (EMG) and displaying them on each FDP (or OSD). With the status of the VCR and mechanism at the moment an emergency occurred can also be confirmed. Notes: The EMG detail information show the information on the latest EMG.

33、 It becomes “ : : ” when there is no latest EMG record. When using the Jig RCU, set its custom code to match the custom code of the VCR. Fig. 1-6a Jig RCU PTU94023B Notes: For the OSD display model, all EMG information are showed by transmitting first code from the Jig RCU. For the EMG content, see

34、“1.6.3 EMG content descrip- tion”. (2) Transmit the code “59” from the Jig RCU again. The FDP shows the EMG detail information in the form of “ *1: *2 : 34 ”. *1: Deck operation mode at the moment of EMG *2: Mechanism operation mode at the moment of EMG 3: Mechanism sensor information at the moment

35、of EMG 4: Mechanism mode position at the moment of EMG Note: For the EMG detail information , see “1.6.4 EMG de- tail information ”. (3) Transmit the code “59” from the Jig RCU once again. The FDP shows the EMG detail information in the form of “ *5 : *6 : *7 ”. *5: Type of the cassette tape in use

36、. *6: Winding position of the cassette tape in use *7: Type of the cassette tape in use (Winding area) Note: For the EMG detail information , see “1.6.5 EMG de- tail information ”. (4) Transmit the code “59” from the Jig RCU once again to re- set the display. 1.6.2Clearing the EMG history (1) Displa

37、y the EMG history. (2) Transmit the code “36” from the Jig RCU. (3) Reset the EMG display. Example 1 E : 01 : 03 Previous EMG Latest EMG No EMG recordExample 2E : : 1.6.1Displaying the EMG information (1) Transmit the code “59” from the Jig RCU. The FDP shows the EMG content in the form of “E:*:*”.

38、INITIAL MODE DATA CODE CUSTOM CODE 43: ACODE 53: BCODE Data transmitting method Depress the “ ” ( 3 ) button after the data code is set. Jig RCU FDP display model FDP display 0: 00 : 00 E: * * : * * *1: *2 : 34 *5: *6 : *7 E: * * : * * *1: *2 : 34 *5: *6 : *7 EMG detail information EMG detail inform

39、ation EMG detail information EMG detail information EMG content display (E:Latest:Previous) Normal display OSD display model OSD display EMG EMG content display (E:Latest:Previous) 1-6 1.6.3EMG content description Note:EMG contents “E08/E09” are for the model with Dynamic Drum (DD). Table 1-6-3a Whe

40、n the mechanism mode cannot be changed to an- other mode even when the loading motor has rotated for more than 4 seconds in the loading direction, E:01 is identified and the power is turned off. When the mechanism mode cannot be changed to an- other mode even when the loading motor has rotated for m

41、ore than 4 seconds in the unloading direction, E:02 is identified and the power is turned off. When the take-up reel pulse has not been generated for more than 4 seconds in the capstan rotating mode, E:03 is identified, the pinch rollers are turned off and stopped, and the power is turned off. Howev

42、er, the reel EMG is not detected in STILL/SLOW modes. When the drum FG pulse has not been input for more than 3 seconds in the drum rotating mode, E:04 is iden- tified, the pinch rollers are turned off and stopped, and the power is turned off. When the eject operation does not complete in 3 sec- ond

43、s after the start, E:05 is identified, the pinch rollers are turned off and stopped, and the power is turned off. When the cassette insertion operation does not complete in 3 seconds after the start, the cassette is ejected. In addition, when the operation does not complete within 3 seconds after th

44、e start, E:05 is also identified and the power is turned off immediately. When the capstan FG pulse has not been generated for more than 1 second in the capstan rotating mode, E:06 is identified, the pinch rollers are turned off and stopped, and the power is turned off.However, the capstan EMG is no

45、t detected in STILL/SLOW/FF/REW modes. When short-circuiting of the SW power supply with GND has lasted for 0.5 second or more, E:07 is identified, all the motors are stopped and the power is turned off. When DD tilting does not complete in 4 seconds, E:08 is identified, the tilt motor is stopped an

46、d the power is turned off. When the DD FG pulse is not generated within 2.5 sec- onds, E:09 is identified, the tilt motor is stopped and the power is turned off. When the supply reel pulse has not been generated for more than 10 seconds in the capstan rotating mode, E:0A is identified and the casset

47、te is ejected (but the power is not turned off). However, note that the reel EMG is not detected in the SLOW/STILL mode. 1.The mechanism is locked in the middle of mode transition. 2. The mechanism is locked at the loading end due to the encoder position reading error during mode transition. 3.Power is not supplied to the loading MDA. 1.The mechanism is locked in the middle of mode transition. 2.The mechanism is locked at the unloading end due to the encoder posi- tion reading error during mode transition. 3.Power is not supplied to the loading MDA. 1.The take-up reel p