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S/M No. : K3050MECHA
Service Manual
VCR MECHANISM UNIT
(K50 / K30-MECHA DECK)
DAEWOO ELECTRONICS CO., LTD.
http : //svc.dwe.co.kr March. 2000
CONTENTS
1. MECHANISM DESCRIPTION .................................................................................................2
2. ASSEMBLY DIAGRAM & MAJOR PARTS CHECK ..............................................................5
3. DISASSEMBLY AND REPLACEMENT ................................................................................12
4. MECHANICAL ADJUSTMENT..............................................................................................22
5. ADJUSTMENT OF TAPE TRANSPORTING SYSTEM.......................................................27
6. EXPLODED VIEW AND PARTS LIST....................................................................................37
1
1.DESCRIPTIONOFTHEMECHANISM
1-1 CHARACTERISTIC OF THE K30-DECK MECHANISM
1) K30-MECHA DECK follows the VHS standard.
2) K30-MECHA DECK uses three motors (DRUM MOTOR, CAPSTAN MOTOR and L/C MOTOR)
3) K30-MECHA DECK uses L/C MOTOR to drive FRONT LOADING.
4) K30-MECHA DECK recognizes each mode by using a 4-BIT MODE signal. This 4-BIT MODE signal is
generated by the CAM SWITCH which is driven by the L/C MOTOR.
5) K30-MECHA DECK is operated by 7 MODES (EJECT/INITIAL/REV/IDLE/PLAY, STOP ,
SLOW/BRAKE/FF & REW).
6) K30-MECHA DECK reduces the mode shifting time, that is, picture playing time by using the FULL
LOADING SYSTEM that has the DRUM wrapped by the tape.
7) K30-MECHA DECK is seperated from the Main PCB. When assembling, it is connected by B-B TYPE
CONNECTOR.
The CAPSTAN MOTOR and DRUM OUTPUT of K30-MECHA DECK and the MAIN PCB DECK are
directly connected without using cable.
2
1-2 WIRE DIAGRAM
1-2-1) WIRE DIAGRAM
3
1-2-2) CONNECTOR PIN ARRANGEMENT
CN-1 (2 HEAD MONO) CN-A
1 SP-L 1 GND
2 COMMON 2 DRUM SPD CTL
3 SP-R 3 Vcc
4 GND 4 DRUM FG
5 DRUM PG
6 NON CONNECT
7 NON CONNECT
CN-B
1 FE HEAD
2 GND
CN-1 (4 HEAD MONO) CN-C CN-2
1 SP-L 1 L/C MT (+) 1 EVER 5V
2 COMMON 2 L/C MT (