Nakamichi-MB75-cd-sm维修电路原理图.pdf

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 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 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 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 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 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 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 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 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 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 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 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 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 RadioFans.CN 收音机爱 好者资料库 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 RadioFans.CN 收音机爱 好者资料库 P 3 1(ii) Prevent CD Auto Eject: Shutter sensor is not activated properly (Loading Assy) Clear Burr at Shut Arm (P#0C20268B) RadioFans.CN 收音机爱 好者资料库 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 repair RadioFans.CN 收音机爱 好者资料库 P 5 2(ii) Strengthen Loading FPC Assy (Loading Assy) Add Kapton tape at Loading FPC Assy RadioFans.CN 收音机爱 好者资料库 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 shut arm is in vertical position. 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RadioFans.CN 收音机爱 好者资料库 P 7 3(ii) Prevent E-mecha: shut arm movement not smooth (Loading Assy) Change Shut Arm Spring (0C20427C) bond apply area Before Change RadioFans.CN 收音机爱 好者资料库 P 8 3(iii) Prevent E-mecha: loading CAM Mechanism jamming (Loading Assy) (6 Disc Mechanism) Apply Super Glue in between Loading Plate R Sub Assy (CG10119C) & Photo Sensor Holder (0C20418C) RadioFans.CN 收音机爱 好者资料库 P 9 4(i) Prevent E-mecha: clamper arm does not catch clamp plate (Clamper Assy) Apply hanarl on clamp Arm Sub Assy (CG10141D) RadioFans.CN 收音机爱 好者资料库 P 10 Apply hanarl on clamp Arm Sub Assy (CG10141D) 4(ii) Prevent E-mecha: clamper arm does not catch clamp plate (Clamper Assy) RadioFans.CN 收音机爱 好者资料库 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 RadioFans.CN 收音机爱 好者资料库 P 12 4(iv) Prevent 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 RadioFans.CN 收音机爱 好者资料库 P 13 4(v) Prevent E-mecha: clamper arm does not catch clamp plate (Clamper Assy) Apply harnal on Clamp Plate & Clamp Arm Sub Assy RadioFans.CN 收音机爱 好者资料库 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) RadioFans.CN 收音机爱 好者资料库 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 top of Clamp Plate RadioFans.CN 收音机爱 好者资料库 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 RadioFans.CN 收音机爱 好者资料库 P 17 5(ii) Prevent E-mecha: loading guides does not hold disc correctly when closed (Loading guide Assy) Apply Molykote PG-663 instead of KS-39M on Shaft x2 of Loading Plate STC Sub Assy RadioFans.CN 收音机爱 好者资料库 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 RadioFans.CN 收音机爱 好者资料库 P 19 5(iv) Prevent E-mecha: lower plate sub assy may touch to traverse vertical screw during disc change (Loading guide Assy) Change to modified spare part File Lower Plate Sub Assy CG10118A to 30% depth of thickness RadioFans.CN 收音机爱 好者资料库 P 20 6 Improve 8cm Disc Eject: 8cm Disc does not eject (Loading guide Assy) Change to new Spring bias P# 0C20257A RadioFans.CN 收音机爱 好者资料库 P 21 7 Prevent E-mecha: loading guide R touches to lock guide top ( Loading Guide Assy) Change to new Loading Plate R Sub Assy P# CG10119C RadioFans.CN 收音机爱 好者资料库 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 RadioFans.CN 收音机爱 好者资料库 P 23 9 Prevent E-mecha: eject jamming (Loading Guide Assy) Change to modified spare part Cut Pre load Gear 0C20371B by 0.4mm (Inside loading guide Assy) RadioFans.CN 收音机爱 好者资料库 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 assy must not move at the same time RadioFans.CN 收音机爱 好者资料库 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 Chassis Assy) Apply “Harnal” on the top & bottom of Traverse Mecha Sub Assy (pick up traverse area) RadioFans.CN 收音机爱 好者资料库 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) RadioFans.CN 收音机爱 好者资料库 P 27 11 Prevent E-mecha: loading guide L touches to traverse mecha chassis assy (Traverse Mecha Chassis Assy) Change to new Traverse Mecha Chassis Sub Assy P# CG10139D RadioFans.CN 收音机爱 好者资料库 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# 0C20357A by LUMI CUT W3.2MM x6 P#0E04396A (Red color) (2 on each place) RadioFans.CN 收音机爱 好者资料库 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 part RadioFans.CN 收音机爱 好者资料库 P 30 14(i) Prevent E-mecha: Gear damage (Feed motor Assy) (6 Disc mechanism only) Replaced with a new Feed Motor Assy (CA10102B) RadioFans.CN 收音机爱 好者资料库 P 31 Add Sony bond SC-121 14(ii) Prevent E-mecha: Gear damage (Feed motor Assy) (6 Disc mechanism only) RadioFans.CN 收音机爱 好者资料库 P 32 15 Prevent E-mecha: clamper arm does not catch clamp plate (Clamper Assy) (6 Disc mechanism only) Apply hanarl on Clutch Arm Sub Assy gears RadioFans.CN 收音机爱 好者资料库 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 RadioFans.CN 收音机爱 好者资料库 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 RadioFans.CN 收音机爱 好者资料库 P 35 Summary Most of the improvements are in the Loading Assembly (Part # CA10105). Traverse Mecha Chassis Assy. Feed Motor Assy Front Base Assy RadioFans.CN 收音机爱 好者资料库