Nakamichi-MB75-cd-sm 电路图 维修手册.pdf

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1、RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 P 1 Improvements of 6 Disc & CD-700 / CD-700II Mechanism P 2 1(i) Prevent CD Auto Eject: Shutter sensor is not activated properly (Loading Assy) Add PVC sheet (0.5 x 0.3 x 0.24mm) P#0C10606A at Shut Arm Plate P 3 1(ii) Prevent C

2、D Auto Eject: Shutter sensor is not activated properly (Loading Assy) Clear Burr at Shut Arm (P#0C20268B) P 4 Cut Reinforcement board at Loading FPC Assy (Cut away 10mm) Remains 5mm 2(i) Prevent E-mecha: bad solder joint due to insertion force at CN107 (Main PCB Assy) Resolder or replace CN107 for r

3、epair P 5 2(ii) Strengthen Loading FPC Assy (Loading Assy) Add Kapton tape at Loading FPC Assy P 6 Press Plate PLS Sub Assy & make sure that shut arm cannot move 3(i) Prevent E-mecha: loading CAM Mechanism jamming (Loading Assy) If it moves, check if the 3 teeth of the shut arm rack comes out when s

4、hut arm is in vertical position. If no, re-adjust the shut arm. P 7 3(ii) Prevent E-mecha: shut arm movement not smooth (Loading Assy) Change Shut Arm Spring (0C20427C) bond apply area Before Change P 8 3(iii) Prevent E-mecha: loading CAM Mechanism jamming (Loading Assy) (6 Disc Mechanism) Apply Sup

5、er Glue in between Loading Plate R Sub Assy (CG10119C) & Photo Sensor Holder (0C20418C) P 9 4(i) Prevent E-mecha: clamper arm does not catch clamp plate (Clamper Assy) Apply hanarl on clamp Arm Sub Assy (CG10141D) P 10 Apply hanarl on clamp Arm Sub Assy (CG10141D) 4(ii) Prevent E-mecha: clamper arm

6、does not catch clamp plate (Clamper Assy) P 11 4(iii) Prevent E-mecha: clamper arm does not catch clamp plate (Clamper Assy) Check Clamp Lock Spring (0C20439B) for bond apply area ( Less than half of the top part of the circle) NG OK Check Clamp Lock Spring (0C20439B) for smoothness P 12 4(iv) Preve

7、nt E-mecha: clamper arm does not catch clamp plate (Clamper Assy) Change clamp arm sensor if the gap is too big. Keep minimum gap between Clamp Arm Sensor & Bracket during assembly P 13 4(v) Prevent E-mecha: clamper arm does not catch clamp plate (Clamper Assy) Apply harnal on Clamp Plate & Clamp Ar

8、m Sub Assy P 14 4(vi) Prevent E-mecha: clamper arm does not catch clamp plate (Clamper Assy) Change to new Clamp Plate P/no.CG10180C (With circle Mark) P 15 4(vii) Prevent E-mecha: clamper arm does not catch clamp plate (Clamper Assy) Add Clamp Head P/no:0C10602A & Clamp Head Sheet P/n.0C10603A on t

9、op of Clamp Plate P 16 5(i) Prevent E-mecha: loading guides does not hold disc correctly when closed (Loading guide Assy) Check that Loading Guide L Sub Assy is able to move smoothly P 17 5(ii) Prevent E-mecha: loading guides does not hold disc correctly when closed (Loading guide Assy) Apply Molyko

10、te PG-663 instead of KS-39M on Shaft x2 of Loading Plate STC Sub Assy P 18 5(iii) Prevent E-mecha: loading guides does not hold disc correctly when closed (Loading guide Assy) Change to new spring P# 0C10605A P 19 5(iv) Prevent E-mecha: lower plate sub assy may touch to traverse vertical screw durin

11、g disc change (Loading guide Assy) Change to modified spare part File Lower Plate Sub Assy CG10118A to 30% depth of thickness P 20 6 Improve 8cm Disc Eject: 8cm Disc does not eject (Loading guide Assy) Change to new Spring bias P# 0C20257A P 21 7 Prevent E-mecha: loading guide R touches to lock guid

12、e top ( Loading Guide Assy) Change to new Loading Plate R Sub Assy P# CG10119C P 22 8 Prevent E-mecha: loading guide jamming (Loading Guide Assy) Bend this angle up to more than 80Rack loading CAM Sub Assy touches to this gear P 23 9 Prevent E-mecha: eject jamming (Loading Guide Assy) Change to modi

13、fied spare part Cut Pre load Gear 0C20371B by 0.4mm (Inside loading guide Assy) P 24 10(i) Prevent CD skip: CD skip (Traverse Mecha Chassis Assy) Change traverse mecha chassis assy if pickup assy moves Move pickup assy. Check that pickup shaft can move in between drive shaft and thrust assy. Pickup

14、assy must not move at the same time P 25 10(ii) Prevent CD skip: CD skip at low temperature (Traverse Mecha Chassis Assy) When fixing Pickup Feed Shaft into Drive Shaft Guide Assy, make sure the Pickup feed shaft must be straight 10(iii) Prevent CD skip: CD skip at low temperature (Traverse Mecha Ch

15、assis Assy) Apply “Harnal” on the top & bottom of Traverse Mecha Sub Assy (pick up traverse area) P 26 Check that pickup feed shaft must be straight Apply harnal on Pick-up traverse area 10(ii) & 10(iii) Prevent CD skip: CD skip at low temperature (Traverse Mecha Chassis Assy) P 27 11 Prevent E-mech

16、a: loading guide L touches to traverse mecha chassis assy (Traverse Mecha Chassis Assy) Change to new Traverse Mecha Chassis Sub Assy P# CG10139D P 28 12 Prevent E-mecha: Thrust ring comes out when traverse mechanism moves up & down (Traverse Mecha Chassis Assy) Replace Thrust Ring x3 pcs P# 0C20357

17、A by LUMI CUT W3.2MM x6 P#0E04396A (Red color) (2 on each place) P 29 Use a small round file to file 0.5mm1mm on the touching area of Stocker FPC Assy 13 Prevent E-mecha: stocker FPC assy touches with loading roller guide assy (Loading Chassis Assy) (6 Disc mechanism only) Change to modified spare p

18、art P 30 14(i) Prevent E-mecha: Gear damage (Feed motor Assy) (6 Disc mechanism only) Replaced with a new Feed Motor Assy (CA10102B) P 31 Add Sony bond SC-121 14(ii) Prevent E-mecha: Gear damage (Feed motor Assy) (6 Disc mechanism only) P 32 15 Prevent E-mecha: clamper arm does not catch clamp plate

19、 (Clamper Assy) (6 Disc mechanism only) Apply hanarl on Clutch Arm Sub Assy gears P 33 16 Prevent E-mecha: loading guides does not hold disc correctly when closed (Loading guide Assy) Change to modified part Drill hole 3.5 P 34 17 Prevent CD cannot insert: Plate PLS Sub Assy touches to Front Base (Front Base Assy) Change to modified part Before change After change - Milling down of Front base P 35 Summary Most of the improvements are in the Loading Assembly (Part # CA10105). Traverse Mecha Chassis Assy. Feed Motor Assy Front Base Assy