Panasonic TX-21GV1, Service Manual

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DESCRIPTION OF THE VCR MECHANISM
Characteristic of the K-Deck mechanism
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K-Mecha Deck follows the VHS standard and uses three motors (DRUM MOTOR, CAPSTAN MOTOR and L/C MOTOR).
The L/C MOTOR is used to drive FRONT LOADING.
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The deck recognises 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.
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There are 7 MODES which are utilised (EJECT / INITIAL / REV / IDLE / PLAY, STOP, SLOW / BRAKE / FF & REW).
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The reduction of the mode shifting time, i.e. picture playing time, is enabled by using the FULL LOADING SYSTEM that has
the DRUM wrapped by the tape.
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The Main PCB is separated from the Deck. When assembling, it is connected by the B-B TYPE CONNECTOR.
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The CAPSTAN MOTOR and DRUM MOTOR are directly connected to the MAIN PCB DECK
ASSEMBLY DIAGRAM OF DECK ASSEMBLY
TOP VIEW
1) EARTH BRACKET ASSEMBLY 9) IDLER PLATE TOTAL ASSEMBLY 17) A/C HEAD TOTAL ASSEMBLY
2) FE HEAD 10) T MAIN BRAKE ASSEMBLY 18) T SLANT POLE ASSEMBLY
3) S SLANT POLE ASSEMBLY 11) T-BRAKE ASSEMBLY 19) DRUM TOTAL ASSEMBLY
4) TENSION BAND ASSEMBLY 12) RELAY LEVER 20) RECORD SAFETY LEVER
5) REEL TABLE 13) CAPSTAN MOTOR
6) MAIN BASE ASSEMBLY 14) PINCH LEVER TOTAL ASSEMBLY
7) S SUB BRAKE ASSEMBLY 15) L/C BRACKET TOTAL ASSEMBLY
8) S MAIN BRAKE ASSEMBLY 16) CAM GEAR
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1
18 17
16
15
14
13
12
11
10
9
8
7
20
6
19
2
3
4
5
Fig.12.