JVC SR-VS30E, Service Manual

Page: 43 / 136

2-21
2.5 DISASSEMBLY/ASSEMBLY OF THE MECHANISM
ASSEMBLY
2.5.1 Introduction
The disassembly and assembly of the mechanism assem-
bly should usually be performed in the ASSEMBLY mode.
(Table 2-5-1)
Note that the mechanism is in the cassette in (C-IN) mode
when the mechanism assembly is taken out of the set and
that the C-IN mode should be switched to the ASSEMBLY
mode in this case.
2.5.2 Mechanism Modes
The mechanism has 6 modes as shown in Table 2-6-1. The
current mode can be confirmed by the positioning of the “
”
marking on the sub-cam gear and the “ ” marking on the
mechanism.
See the following figures (Figs. 2-5-1 to -6) for details.
Note:
•
This mechanism assembly has another ASSEMBLY
mode. However, this mode cannot be identified from the
markings because it corresponds to an intermediate po-
sition between the C-IN ( C ) mode and S-FF ( H ) mode.
This mode can be confirmed by the rotary encoder
phase. See Fig. 2-5-7.
1. Checking the mechanism mode
R. ENC -20
ROTARY
ENCORDER
2
1
3
MAIN CAM GEAR 0
C-IN
ASSEMBLY
S. FF
LOADING END
PLAY REV STOP FF/REW
0
15
33.33
40
166.66
140
193.33
160
226.66
185
273.33
220
306.66
245
36
°
17
°
169.66
°
87
°
190.33
°
196.33
°
223.66
°
229.66
°
270.33
°
276.33
°
303.66
°
30.33
°
36.33
°
MODE
PARTS
H C H P
R S F
To set the ASSEMBLY mode, apply 3 V DC to the electrodes
on the upper part of the loading motor as shown in Fig. 2-5-
7.
Fig. 2-5-1 Fig. 2-5-2 Fig. 2-5-3
Fig. 2-5-4 Fig. 2-5-5 Fig. 2-5-6
Table 2-5-1