Jvc-CHX-200-Service-Manual 电路图 维修手册.pdf

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1、RadioFans.CN 收音机爱 好者资料库 ?1. Remove the screw (1-a) to unlock the mounting direction knob located on the side of the main unit. ?2. Turn the mounting direction knob in the direction of the arrow using a coin, etc. to remove it. (The knob can be removed only when it is set to this position.) ?3. Remov

2、e the four top cover fixing screws (1) at the triangle (A) marks on the side of the main unit. (Perform the same operation on both sides.) ?4. Turn the unit upside down so the bottom surface is facing upward. ?5. Lift the rear edge of the bottom cover slightly and lift the side by grasping the DIN j

3、ack section on the side panel, then turn it toward the front (raise upward) to remove the bottom cover. ?6. Unhook the four catches located on both sides of the front panel, and turn the front panel toward the top cover (lower down) to remove the front panel. Remove 1-a and turn in the direction of

4、the arrow. Fig. 1 Fig. 2 Fig. 3 Fig. 4 *Exterior Section Removing the Bottom Cover and Front Panel Assembly 11 111-a 11 111-a Remove 1-a and turn in the direction of the arrow Unhook catches Unhook catches The front panel can be separated by raising the cover. Slightly lift the jack section to remov

5、e. Disassembling Procedures Perform operations according to the items to be disassembled. Replacement of the Pickup 1. After removing the exterior (top and bottom). 2. Proceed to the Pickup Replacement section. 3. When applying grease, refer to the Exploded View. Use new grease. ? Mechanism Section

6、1. Remove the exterior (required section only). 2. The mechanism section is designed so that each unit can be removed separately. 3. When re-assembling, refer to the assembling precautions. (Use new grease when applying grease.) Removal of Main Parts RadioFans.CN 收音机爱 好者资料库 Removing the Top Cover 1.

7、 Remove the four damper bracket fixing screws (2) to remove the damper brackets. 2. Pull out the dampers, being careful not to damage them. When re-attaching a damper, insert your finger to push out the center of the damper to mount it on the damper shaft, as shown in Fig. 6-1. 3. Turn the damper sp

8、ring bracket toward the top at a right angle as shown in Fig. 7, then push down the lower side of the damper spring bracket to lift it off. 4. Remove the three fixing screws (3) and (4) on the DIN jack PCB assembly. 5. Lift the changer unit upward. 6. Remove the damper springs from the mechanism cha

9、ssis if required. To reassemble, refer to the diagram below. Fig. 5 ? Fig 6 ? Fig. 6-1 ? Fig. 7 ? Fig. 8 ? Fig. 8-1 ? Fig. 9 Apply alcohol to the shaft then immediately attach the damper. (After attaching, check that the shaft is correctly inserted.) Push out with your finger before attaching Turn t

10、o the top position (at a right angle), then push down to lift off. Lift the changer unit upward How to Attach the Damper Springs Silver (mechanism side) Black (magazine side) Mechanism Chassis Remove the flexible ribbon wire if required 2 2 2 2 4 4 3 RadioFans.CN 收音机爱 好者资料库 Removing the Fittings Rem

11、oving the Main PCB Assembly 1. Remove the fixing screw (5). 2. Unhook the two catches (a) on the top edge of the fitting, then unhook the catches (b) at the left/right bottom edges. 1. Remove the power IC fixing screw (6). 2. Remove the four screws (7) securing the main PCB assembly. 3. Disconnect p

12、osition motor wire connector CN504 from the main PCB assembly. 4. Disconnect sensor PCB assembly wire connector CN601 from the main PCB assembly. 5. Remove the flexible ribbon wire from CN502 on the traverse mechanism PCB assembly. ? When re-installing the PC boards, refer to the reassembling proced

13、ures for protecting switches, etc. Catches (a) Catches (b) Fitting 5 7CN601 7 7 Fig. 10 Fig. 11 6 CN504 CN502 Fig. 14 Fig. 15 Fig. 16 Sensor Assembly 1 1 a Rear Magazine Lock Spring Poly-Washer (b) c Positioning Motor Assembly 2 *Changer Mechanism Section Sensor Assembly Unit 1. Remove the two screw

14、s (1) securing the sensor assembly unit. 2. Unhook the springs on the back of the sensor assembly unit from the holes on the chassis. Magazine Lock Arm 1. Remove the magazine lock spring from the front side of the chassis. 2. Remove the poly-washer (b) securing the magazine lock arm. 3. Turn the mag

15、azine lock arm in the direction of the arrow until the notch is at the C position to remove it from the chassis. Positioning Motor Assembly 1. Remove the two screws (2) securing the positioning motor. 2. Slightly lift the positioning motor assembly to remove it from the two burrs on the chassis. Can

16、 be removed at the stud position (at the widest hole) Remove Shift Third Gear Fig. 17 Fig. 18 Fig. 19 Fig. 20 Remove the E-washer Third gear Slide and remove the rod inside Slide Rod Top Plate Remove After Lifting 3 3 3 3 3 e Rear Slider 1. Position the unit with the front section facing down. Rotat

17、e the third gear located on the back of the main unit in the direction of the arrow (clockwise). 2. Shift the rear slider in the direction of the arrow and remove it at the rear slider mounting position (at the widest hole). Front Slider 1. Position the unit with the rear section facing down. Rotate

18、 the third gear located on the bottom of the unit in the direction of the arrow (clockwise) until the front slider is shifted to the outermost position. 2. Remove the E-washer securing the front slider to remove the front slider from the chassis. Top Plate 1. Remove the nine screws (3) securing the

19、top plate. 2. Disconnect the section (e) attached to the rear of the unit, then lift the top plate slightly. 3. Slide the top plate toward the rear of the unit to remove the upper rod from the top plate. Lifter Unit 1. Unhook the elevator spring located on the front side of the unit. (Be sure to fir

20、st unhook the spring from the lifter side as shown in the upper part of the diagram.) 2. Lift the lifter unit upward, then remove the lower rod to remove the lifter unit from the chassis. Lifter Bracket 1. Remove the two lifter bracket fixing screws (4) located on the back of the lifter unit. 2. Rem

21、ove the lower rod. Side Bracket and Traverse Mechanism 1. Remove the two side bracket unit fixing screws (5) to disconnect the side bracket unit from the lifter unit. 2. Remove the three shafts on the traverse mechanism assembly from the lifter unit. For reassembling, refer to the reassembling proce

22、dures. Fig. 21 Fig. 22 Fig. 23 Fig. 24 Unhook this part first Proper orientation Lift up the lifter unit Lower Rod Remove from the lifter unit Remove from the lifter unit 5 5 4 4 ? Fig. 25 ? Fig. 26 ? Fig. 27 Pickup Flexible PCB Pickup: Remove after shorting Tray Motor Wire CN501 Feed Motor Spindle

23、Motor Grounding Point Grounding Point 6 6 Pickup Assembly Shaft Holder Feed Slide Shaft Assembly Middle Gear Feed Motor Remove gears and motors only when required. Rack Arm Pull out 10 9 8 7 Chassis Pickup Assembly 1. Remove the three mechanism PCB fixing screws (6) located on the back of the traver

24、se mechanism. 2. Disconnect the two feed motor wires (blue and white), two spindle motor wires (red and black) and two tray motor wires (brown and black) that are soldered to the mechanism PCB assembly. 3. Short-circuit the grounding point on the mechanism PCB assembly, and lift it with the flexible

25、 PCB attached to connector CN501. Next, short-circuit the grounding point on the pickup unit and disconnect CN501. 4. Remove the screw (7) to remove the feed motor assembly. 5. Remove the screw (8) to remove the shaft holder retaining the feed slide shaft assembly and the middle gear. 6. Remove the

26、middle gear. 7. Move the pickup assembly upward from the gear section and remove it from the traverse chassis assembly. 8. Remove the two screws (9) to remove the rack arm. 9. Pull out the feed slide shaft assembly. 10. Remove the screw (10) to remove the spring. ? Note: Before replacing the pickup,

27、 be sure to short-circuit the grounding points. First short-circuit the PCB section and then immediately short-circuit the pickup section. Tray Motor 1. Remove the two screws (11) securing the tray motor. 2. Remove the two screws (12) to remove the tray motor assembly from the tray motor holder. Sep

28、aration of the Chassis L Assembly and Chassis R Assembly ? 1. Remove the two screws (13) retaining the chassis L and R assemblies. ? 2. Slide the chassis L assembly toward the front and detach it, then remove the chassis L upward. ? Fig. 28 ? Fig. 29 ? Fig. 30. Tray Motor Assembly Tray Motor Tray Mo

29、tor Holder Slide and remove upward as shown by the arrow Front side 11 11 12 13 13 Precautions On Reassembling When reassembling, also refer to the disassembling procedures. Mounting the Traverse Mechanism 1. When mounting the pickup assembly, attach the feed slide shaft assembly to the traverse cha

30、ssis. ? Apply E-JC-525 grease to the shaft. 2. Mount the middle gear and the feed slide shaft to the traverse chassis and secure them with the screw (14) through the shaft holder. 3. Before mounting the mechanism PCB assembly, move the pickup to the outer edge position, then secure the PCB assembly

31、using the screw (15). At this time, check that the rest switch is correctly placed. 4. To mount the rack arm, first move the pickup to the middle position and secure it with the screws (16). ? Fig. 34 ? Fig. 33 ? Fig. 32 ? Fig. 31 Pickup Assembly Attached to chassis Shaft Holder Feed Slide Shaft (ha

32、lf coated with grease) Middle Gear Motor Chassis Mounting the Feed Motor Assembly Feed Motor Shaft Holder Spindle Motor Mechanism PCB Assembly Rack Arm Move the pickup to the middle position 15 15 15 16 14 Mounting the Lifter unit 1. Insert the shafts (B) of the traverse mechanism assembly into the

33、slide grooves (F) on the lifter unit. 2. Shift the hook of the lifter unit to the edge, and shift the sliding lever inside the side bracket unit to the edge as well. 3. With each hole and lever shifted to the edge, mount the lifter unit and side bracket unit from the side. (Check each attached secti

34、on, and check that the two shafts (C) of the lifter unit are correctly inserted into the holes (g) of the side bracket unit. After mounting, check that the levers move together. ) 4. Turn the lifter unit upside down. As shown in Fig. 37, slide the lever 30 mm away from the edge, then mount the lifte

35、r bracket L assembly. Fig. 35 Fig. 36 Fig. 37 (B) (B) (B) (C) Attach Shift inside by approx. 30 mm Expanded View? (g) (F) (F) (F) Connection of the Chassis L Assembly and Chassis R Assembly 1. Attach the lower rod to the chassis R assembly. While shifting the rod toward the front side, mount the rod

36、 on the lifter unit. ? With the rod mounted, place the lifter unit on the chassis R assembly. 2. Combine the chassis L and R assemblies so that the hook section (h) of the chassis L assembly is inserted into the notch of the chassis R assembly by sliding it from the front side. 3. After engaging, se

37、cure with the two screws (18). 4. Attach the tension spring between the lifter unit and the chassis. ? Fig. 38 ? Fig. 39 ? Fig. 40 Lower Rod Notch Attached Slide to engage Combine with R chassis Set last (lifter side) Proper orientation Tension Spring Set first (chassis side) 18 h i i Mounting the T

38、op Plate 1. Mount the upper rod on the lifter side (j) and set it on the rear of the top plate, then mount the other end of the upper rod to (k). 2. Check that the five points (l, m, n, o and p) are correctly positioned. When mounting section (q), set it so that section (D) of the lifter unit is pin

39、ched by the bending section of the top plate. 3. Secure the top plate with six fixing screws (19). Fig. 41 Fig. 42 Fig. 43 Fig. 44 l mn q p Upper Rod (D) Lifter Unit Section p Expanded view of mounting q 19 19 19 k Mounting the Front Slider and Rear Slider 1. Position the unit with the rear side fac

40、ing down, then rotate the third gear in the direction of the arrow (clockwise) until the lift arm comes to the position at which the holes are exposed, as shown in Fig. 45-1. 2. Mount the front slider from the top. Rotate the third gear counterclockwise until the hole of the slider is lined up with

41、the right hole of the stud, as shown in Fig. 45-2. 3. Mount the E-washer on the shaft. 4. Position the unit with the front side facing down, then mount the rear slider. Check that the (r), (s) and (t) positions are correctly mounted as shown in Fig. 46. ? 5. Rotate the third gear in the direction of

42、 the arrow (counterclockwise) until the lifter unit is at the top position. ? Fig. 45-1 ? Fig. 45 ? Fig. 45-2 ? Fig. 46 Stud E-Washer Front Slider Check after mounting Rotate the third gear to move the slider Rotate until the holes are lined up Set so the holes are exposed Position so that the stud

43、and right hole are lined up Rotate the third gear to move the slider rst Mounting the Sensor PCB Assembly 1. Attach the longer spring to the white resin, and attach the shorter spring temporarily to the sensor assembly bracket. 2. Mount the sensor assembly so that the shaft of the lift arm is insert

44、ed into the longer hole on the white resin located on the back of the sensor PCB assembly. 3. Attach the shorter spring to the hook of the lift arm. Mounting the Main PC Board Assembly 1. Rotate the third gear clockwise until section (E) of the front slider and the third hole from the right are line

45、d up. (Be sure to set properly. If incorrectly set, the switches on the PCB assembly may be damaged.) 2. After they are correctly positioned, mount the main PCB assembly. ?Fig. 47 ?Fig. 48 Sensor assembly fixing screws Shorter spring Shorter spring Longer spring Attach temporarily (E) Position so th

46、at the slider hole and third hole from the right are lined up 1 Third Gear Main PCB Assembly Feed Motor Assembly 1 2 2 2 3 CN502 CN501 Unsolder Lifter Bracket (L) Fig. 49 Fig. 50 Tray Motor Assembly Unsolder Traverse Mechanism PCB Assembly Grounding Point Fig. 51 Pickup Assembly Shaft Holder Spindle

47、 Motor Pickup Replacement Procedure Note: When replacing the pickup, be sure to apply countermeasures against static electricity (grounding the operation table, wrist band and soldering iron). To remove it, first short-circuit the grounding point on the mechanism PCB, then lift the mechanism PCB ass

48、embly with CN501 connected. Next, short-circuit the grounding point on the pickup main unit, then unplug the pickup flexible PCB from connector CN501. When reassembling, perform in the reverse order. 1. Remove the bottom cover, front panel and top cover from the exterior section. 2. Unplug the flexi

49、ble ribbon wire from connector CN502 on the traverse mechanism PC board assembly. 3. Turn the rear slider and third gear in the lifter section counterclockwise until the traverse mechanism assembly is in the lowermost (bottom) position. 4. Unsolder the two wires (black and brown) connected to the tray motor. 5. Remove the two screws (1) from the round holes on the chassis R assembly to remove the lifter bracket (L). 6. Remove the lower rod. 7. Short-circuit the grounding point on the traverse mechanism PCB assembly of the lifter unit. Unsolder the wires connected t