Yamaha DA824, Руководство по обслуживанию

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DA824
8
DISASSEMBLY PROCEDURE
DA
JK
<Top View>
Top cover
Power transformer
IF plate
[180]
[360]
[180]
[420]
[290] [380] X16 [280] [A]
[400] X14
[300]
[400]: Bind Head Tapping Screw-B A4.0X8 MFZN2BL (VC688800)
(Fig. 1)
<Rear View>
[420]: Bind Head Screw A4.0X12 MFZN2BL (VP156900)
(Fig. 2)
[350]
MAIN
1. Top Cover
1-1 Remove the fourteen (14) screws marked [400]. The top
cover can then be removed. (Fig. 1)
2. Circuit Boards and Units
Remove the top cover, each circuit board and unit can
then be removed.
Circuit Board and Unit
MAIN
JK
DA
DC Assembly
Power Transformer
A
280
290
300
380
350
360
200
180
Screw
Bonding Screw 4.0X8 MFZN2BL (VS154500)
Bonding Screw 3.0X6 MFZN2BL (VS863000)
Bind Head Tapping Screw-B 3.0X6 MFZN2BL (EP600230)
Bonding Tapping Screw 3.0X8 MFZN2BL (VN41330)
Bonding Tapping Screw 3.0X8 MFZN2BL (VN41330)
Bind Head Tapping Screw-B 3.0X6 MFZN2BL (EP600230)
Bind Head Tapping Screw-B A4.0X6 MFZN2BL (VC688800)
Bind Head Tapping Screw-B A4.0X6 MFZN2BL (VC688800) 2
1
2
5
16
6
4
2
4
Ref. No. Screw QTY
2
2
2
1
2
2
1
3
1
Fig.
3. MYSL Circuit Board
* Note that remove card before following operation.
3-1 Remove the top cover. (See procedure 1.)
3-2 Remove the MAIN circuit board. (See procedure 2.)
3-3 Remove the two (2) screws marked [420]. The IF plate
can then be removed. (Fig. 2)
3-4 Remove the four (4) screws marked [250]. The OPT
assembly can then be removed. (Fig. 3)
3-5 Remove the two (2) screws marked [240]. The MYSL
circuit board can then be removed. (Fig. 3)