Mechanism Adjustment (Dv); Preparation; Precautions; Tools Required For Adjustments - JVC SR-VS30U Service Manual

2.4 PREPARATION

2.4.1 Precautions

(1) Observe the specified screw tightening torque when at-
taching parts. The torque should be 0.04 Nm (0.4 kgfcm)
unless otherwise specified.
(2) Always disconnect the power supply unit before proceed-
ing to solder or attach parts.
(3) When plugging or unplugging a wire, be careful not to
damage the connector.
(4) When replacing a part, be careful not to damage other
parts or to mistakenly attach parts.

2.4.2 Tools Required for Adjustments

TORQUE DRIVER
1 2
YTU94088
YTU94088-003
Tool for replacing tip IC
4
PTS40844-2
Table 2-4-1 Tools Required for Adjustments

2.4.3 Disassembly and Assembly Procedures

The following table shows the steps for assembling or dis-
assembling the mechanism parts. Read the following descrip-
tions carefully before actual assembly/disassembly opera-
tions.
(1) : Order of disassembly steps. Reverse this order when
assembling.
(2) : Name of the disassembled/assembled part.
(3) : Surface where the disassembled/assembled part is
mounted. T = Top. B: Bottom.
(4) : Number of disassembly drawing.
Step
/Loc
No.
1 A Cassette housing assembly/ B Mechanism assembly
2 1 Drum assembly
3 2 Motor bracket assembly
4 3 Middle catcher assembly
§
(1)
2-20

MECHANISM ADJUSTMENT (DV)

Tool for installing slit washer
BIT
3
YTU94121A
Part Name
§
(2)
(5) : Parts to be removed in disassembly/assembly, such as
screws, washers and springs, and the points.
Symbol
S
W
P
Connector, lock(L), soldering(SD),
*
shield, etc.
[Example] • (W1) = Remove the washer W1.
• (P1) = Remove the spring P1.
(6) : Notes for disassembly/assembly.
(7) : For the phase alignment in disassembly/assembly and
the parts which require phase adjustments after assem-
bly, see "2.11 MECHANISM PHASE CHECK/ADJUST-
MENT".
2.4.4 Screws and Washers Used in Disassembly/As-
sembly of the Mechanism Assembly
Table 2-4-1 shows the symbols, designs, part numbers and
colors of the screws and washers used in the mechanism
assembly.
When disassembling or assembling the mechanism assem-
bly, be sure to attach screws and washers correctly by refer-
ring to the following table.
Symbol Part number
(S1)
QYTDSP2004Z
YQ43893
(S2)
YQ43893-7
(S3)
Symbol Part number
YQ44246
(W1)
YQ44246-3
(W2)
YQ43933-2
(W3)
Table 2-4-2
Fig.
Point
No.
T 1 2(S1),(L1) – (L5)
T 2 3(S2)
T 2 4(S2)
T 3 3(S2)
§ § §
(3) (4) (5)
Name & Point
Screw
Washer
Spring
Note Discription
1
2,3
2,4
—
§ §
(6) (7)