S/M No. : TMECHA Service Manual VCR MECHANISM UNIT (T-MECHA DECK) DAEWOO ELECTRONICS CO., LTD. http : //svc.dwe.co.kr Feb.
CONTENTS 1. ASSEMBLY DIAGRAM AND A/S ............................................................................................2 2. WIRE DIAGRAM........................................................................................................................5 3. PERIODIC MAINTENANCE AND SERVICE SCHEDULE ....................................................6 4. SERVICE SCHEDULE FOR THE MAJOR PARTS ................................................................7 5. JIGS AND TOOLS......................
ASSEMBLY DIAGRAM AND A/S 1. Assembly diagram 1-1. DECK Assembly diagram A.
ASSEMBLY DIAGRAM AND A/S (CONTINUED) B.
ASSEMBLY DIAGRAM AND A/S (CONTINUED) 1-2.
WIRE DIAGRAM 1. Wire Diagram 2.
PERIODIC MAINTENANCE AND SERVICE SCHEDULE - After cleaning with alcohol, allow the parts to dry thoroughly before using a cassette tape. b. Cleaning of Driving section • REEL TABLE • CAPSTAN FLYWHEEL/PULLEY • REEL PULLEY B. LUBRICATION • S REEL POST • T REEL TABLE POST • REEL GEAR POST - After cleaning these parts with alcohol, lubricate these with one or two drops of oil. 1. PERIODIC MAINTENANCE AND SERVICE SCHEDULE A.
SERVICE SCHEDULE FOR THE MAJOR PARTS SERVICE SCHEDULE FOR THE MAJOR PARTS The following parts should receive periodic service, according to the recommended intervals. PERIODIC SERVICE (TIME) NAME 1000 2000 3000 4000 5000 DRUM TOTAL ASS'Y CAPSTAN MOTOR L/C BRKT TOTAL ASS'Y REEL BELT IDLER PLATE TOTAL ASS'Y REEL TABLE TENSION BAND ASS'Y S, T BRAKE ASS'Y PINCH ROLLER ASS'Y AC HEAD ASS'Y FE HEAD REEL GEAR TOTAL ASS'Y : Check and Replace if necessary.
JIGS AND TOOLS 1.
JIGS AND TOOLS(CONTINUED) 2.
DEASSEMBLY AND REPLACEMENT 1. Removal of the FRONT LOADING Ass’y (Fig. 3.1) 2. Deassembly of FRONT LOADING Ass’y (FIg. 3.2~3.5) a. Remove the 1 washer for holding the door opener and separate F/L Assembly by moving the DOOR OPENER in the direction of arrow. b. Remove the 2 screw holding the TOP PLATE and separate the CASSETTE HOLDER Ass’y by moving the FL BRKT L and FL BRKT R in the direction of arrow. (Fig. 3.2) NOTE: Remove the FRONT LOADING Ass’y in eject mode. a. Unscrew the 2 screw holding the F/L.
DEASSEMBLY AND REPLACEMENT (CONTINUED) d. Separate the LOADING LEVER Ass’y by pressing the connection point from the CASSETTE HOLDER Ass’y. (Fig. 3.4) e. Remove the SAFETY SPRING connecting the SAFETY LEVER and CASSTTE HOLDER PLATE. (Fig. 3.4) f. Remove the RELEASE SPRING connecting the RELEASE LEVER and SAFETY LEVER. (Fig. 3.4) 3. Deassembly of DRUM Ass’y (Fig. 3.6) a.
DEASSEMBLY AND REPLACEMENT (CONTINUED) 4. Deassembly of LOADING RACK, LOADING ASS’Y, S/T SLANT POLE ASS’Y (Fig. 3.7, 3.8) 5. Deassembly of the A/C HEAD ASS’Y (Fig. 3.9) a. Remove the CONNECTOR @ from the AC HEAD Ass’y, watch out that there is no damage in the HEAD connecting PIN. b. Separate the AC HEAD Ass’y ! after unscrewing the screw #. a. Turn out the DECK MECHANISM and remove the LOADING RACK@ after unscrewing the SCREW !. b. Disintegrate the R LOADING AS # and L LOADING AS $. c.
DEASSEMBLY AND REPLACEMENT (CONTINUED) 6. Deassembly of the LC BRKT ASS’Y, PINCH LEVER TOTAL ASS’Y (Fig. 3.10) a. Separate the LC BRKT Ass’y @ after removing the 3 screw !. b. Separate the LC BRKT Ass’y @ from the DECK MECHANISM. c. Disintegrate the PINCH LEVER TOTAL Ass’y #. CAUTION: • After the assembly of the PINCH LEVER TOTAL Ass’y, adjust the tape transmission section by refering to the chapter 5. • There should be no pollution on the surface of PINCH ROLLER $ with grease or other foreign material.
DEASSEMBLY AND REPLACEMENT (CONTINUED) 8. Deassembly of the S/T BRAKE ASS’Y (Fig. 3.13) 11. Deassembly of the FE HEAD (Fig. 3.14) a. Unhook the S BRAKE SPRING # from the MAINBASE HOOK !. b. Remove the S BRAKE Ass’y @ from the mainbase. c. Remove the T BRAKE SPRING ^ from the MAINBASE HOOK $. d. Remove the T BRAKE Ass’y %. a. Unscrew the screw ^ and separate the FE HEAD & from the MAINBASE. FIg. 3.14 Deassembly of the TENSION BAND ASS’Y, CAPSTAN MOTOR and the FE HEAD FIg. 3.
DEASSEMBLY AND REPLACEMENT (CONTINUED) 12. Deassembly of the REEL TABLE, IDLER PLATE TOTAL ASS’Y (Fig. 3.16) 13. Deassembly of the REEL BRKT TOTAL ASS’Y, CONNECT PLATE (Fig. 3.17) a. Remove the POLY WASHER ! and separate the IDLER PLATE TOTAL Ass’y @ from the mainbase. b. Remove the REEL TABLE $ from the REEL TABLE POST # of the MAINBASE. a. Turn over the DECK MECHANISM and remove the 2 screw !. b. Remove the REEL BRKT TOTAL Ass’y @ from the MAINBASE. c.
MECHANICAL ADJUSTMENT 1. Mechanical Adjustment (Fig. 4.1~4.4) In case of deassembly and reassembly for fixing the mechanical problem, check the following check point. a. Make sure that the DATUM HOLE of the CAM GEAR is aligned with the DATUM HOLE in the MAINBASE in the EJECT mode as shown in Fig. 4.1. b. Make sure that the ending part “A” of the RELAY LEVER assembled on the CONNECT PLATE is aligned with the reference hole “B” of the MAINBASE as shown in Fig. 4.2. c.
MECHANICAL ADJUSTMENT (CONTINUED) d. Make sure that the triangular mark “A” of the L LOADING Ass’y is aligned with the mark “b” of the R LOADING Ass’y. (Fig. 4.4) e. Reference hole “C” of the LOADING RACK should be aligned with the reference hole of the R LOADING Ass’y to make the teeth of the LOADING RACK is aligned as shown in Fig. 4.4. 2. Adjustment and measurement of the BACK TENSION (Fig. 4.5, 4.6) a. Check that the location of the TENSION POLE is in the right position.
MECHANICAL ADJUSTMENT (CONTINUED) 3. Mechanical Mode (Operate without a cassette tape) a. Remove the FRONT LOADING Mechanism from the DECK Mechanism. b. Cap the IR LED and pull the FL RACK. This has the same effect with cassette loading to the deck. c. If the S/T POLE BASE is loaded, Play mode starts automatically. If you want other function, press the corresponding button. d. Turn off the poser when the Mechanism is in the desired position. 4. Adjustment of the position of the TENSION POLE (Fig. 4.6) a.
ADJUSTMENT OF THE TPAE TRANSPORTING SECTION. Generally, tape transporting section has been precisely adjusted in the factory and does not require the ordinary readjustment. But there is the case that tape noise or impact on the deck mechanise, tape transporting section readjustment is required, in adjustment of the tape tranmission section consut the following flow chart. FIg.5.1 A schematic diagram of the tape transporting section If any components shown in Fig. 5.
ADJUSTMENT OF THE TPAE TRANSPORTING SYSTEM Generally the TAPE TRANSPORTING SYSTEM has been precisely adjusted in the factory and does not ordinarily require readjustment. But when noise and tape damage take place and part assemblies that compose the TAPE TRANSPORTING SYSTEM are replaced, check and readjust the TAPE TRANSPORTING SYSTEM. Refer to the following FLOW CHART in order to adjust the TAPE TRANSPORTING SYSTEM.
ADJUSTMENT OF THE TPAE TRANSPORTING SECTION. (CONTINUED) A. Adjustment of the S/T GUIDE ROLLER D.Adjustment of the AUDIO AZIMUTH(Fig. 5.4) a. Check the Playing back with a T-120 TAPE. b. Make sure that excessive tape wrinkle does not occure at eatch S.T GUIDE ROLLER. c. If tape wrinkle is observed at the S/T GUIDE ROLLER, turn the guide roller screw until there is not tape wrinkle. a. Play back the ALIGNMENT TAPE (DN2 : SP, NTSC,7KHz) b. Check the AUDIO output with a AUDIO LEVEL METER. c.
ADJUSTMENT OF THE TPAE TRANSPORTING SECTION. (CONTINUED) G.Adjustment of the LINEARITY(Fig. 5.7) S/W PULSE TEST PIN ENVELOPE TEST PIN Measurement Equipment OSILLOSCOPE VR CONTROL Adjustment S/T GHIDE ROLLER Test Point PATH ADJ. FIXTURE PATH ADJ.FIXTURE PATH ADJ.FIXTURE TAPE TRANSMISSON SECTION a. Connect the PT01 on the MAIN CIRCUIT BOARD with a PATH ADJ.FIXTURE. FIg.5.5 Adjustment of the X-POSITION b. Play back an ALIGNMENT TAPE (DN-2 : MONOSCOPE Signal). c.
ADJUSTMENT OF THE TPAE TRANSPORTING SECTION. (CONTINUED) H.Adjustment of the wave form of DRUM Entrance / Exit (Fig. 5.8) S/W PULSE TEST PIN ENVELOPE TEST PIN Measurement Equipment OSILLOSCOPE VR CONTROL Adjustment S/T GHIDE ROLLER Test Point e. PATH ADJ. FIXTURE PATH ADJ.FIXTURE f. PATH ADJ.FIXTURE TAPE TRANSMISSON SECTION g. a. Connect the PT01 on the MAIN CIRCUIT BOARD with a PATH ADJ.FIXTURE. b. Play back an ALIGNMENT TAPE(DN-2 : MONOSCOPE signal) c. Connect the S/W PULSE TEST PIN on the PATH ADJ.
ADJUSTMENT OF THE TPAE TRANSPORTING SECTION. (CONTINUED) K.Adjustment of the AUDIO AZIMUTH L. X-POSITION Test Point AUDIO OUTPUT AUDIO OUTPUT JACK Measurement Equipment AUDIO LEVEL METER S/W PULSE TEST PIN ENVELOPE TEST PIN Measurement Equipment OSILLOSCOPE VR CONTROL Adjustment S/T GHIDE ROLLER Test Point a. Connect the AUDIO output JACK with an AUDIO LEVEL METER. b. Play back the ALIGNMENT TAPE(DN-2:MONOSCOPE 7KHz Signal). c. Check if the AUDIO output signal level is over : -9 ~3dBm. d.
EXPLODED VIEW AND PARTS LIST 1.
EXPLODED VIEW AND PARTS LIST (CONTINUED) 2.
EXPLODED VIEW AND PARTS LIST (CONTINUED) 3.
EXPLODED VIEW AND PARTS LIST (CONTINUED) 4.
EXPLODED VIEW AND PARTS LIST (CONTINUED) 5.
EXPLODED VIEW AND PARTS LIST (CONTINUED) Parts List of Deck Total Ass’y (continud) LOC PART S/N PART NAME PART DISCRIPTION DRUM AS REFERRING TO LIST OF DRUM PRICE ASS’Y DRUM AS D0010 D0030 97SA324400 DRUM M/T AS E20XL-25 D0030 97SA327100 DRUM M/T AS DMVDMTO4M D0040 7001260711 SCREW MACHINE PAN 2.
EXPLODED VIEW AND PARTS LIST (CONTINUED) Parts List of Deck Total Ass’y LOC PART S/N PART NAME PART DISCRIPTION DECK AS A1700 97S2709600 RACK FL PBT(DY4410GF) NATURAL A1800 97S2708200 GEAR CAM DERLIN 100 A1900 97SA317100 PINCH LEVER TOT AS T-MECHA A2000 97SA318010 LC BRKT AS T-MECHA A2100 7274300611 SCREW TAPPTITE TT3 RND 3X6 MFZN A2200 97SA317300 IDLER PLATE TOT AS T-MECHA A2300 97S3108200 POLYWASHER D2.6XD6.0XT0.
EXPLODED VIEW AND PARTS LIST (CONTINUED) 6.
DAEWOO ELECTRONICS CO., LTD 686, AHYEON-DONG MAPO-GU SEOUL, KOREA C.P.O. BOX 8003 SEOUL, KOREA TELEX : DWELEC K28177-8 CABLE : "DAEWOOELEC" E-mail : G7F00E@web.dwe.co.
