Yamaha Ls 9 Service Manual

							31 LS9-16/LS9-32Fig. 6
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[206A]:  Bind Head Tapping Screw-B
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[209A]:  Bind Head Tapping Screw-B
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[302A]:  Bind Head Tapping Screw-B
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[303A]:  Bind Head Tapping Screw-B
¢#» Ä´#*/%£3.0X8 MFZN2B3 IT (WE997400)
[352A]:  Bind Head Tapping Screw-B
¢#» Ä´#*/%£3.0X6 MFZN2B3 (WF028600)
Power switch knob
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Photo 6
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[352A]
[206A] [202]
[202]
DCA

Duct assembly 16
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Power supply unit
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Earth film
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[302A] [303A]
Duct top 16
¢¼«ÄÄ¿Ó£Ferrite support
¢Ñ£å Ä±Ù”Ä£ [206A]
[206A]
[209A]
[206A]
A-10. Power Supply Unit 
  (Time required: About 10 minutes)
A-10-1 
Remove the side panels L and R. (See procedure 1)
A-10-2 Fix the control panel assembly 16. (See procedure 2)
A-10-3 Remove the JK circuit board. (See procedure A-4)
A-10-4 Remove the DA circuit board. (See procedure A-5)
A-10-5 Remove the seven (7) screws marked [206A]. The 
duct top 16 can then be removed. (Fig. 6)
A-10-6 Remove the four (4) screws marked [302A] and 
screw marked [303A]. The power supply unit can 
then be removed. (Fig. 6)
 *  
The earth film is not part of the power supply 
unit. When replacing the power supply unit, 
remove the earth fi lm from the power supply unit 
and install it on the new power supply unit. (Fig. 6)

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							LS9-16/LS9-32
32
Photo 7
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•Duct assembly 16¢¼«ÄTT’Z
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DC fan motor

[D60]
[D60]: Bind Head Tapping Screw-B
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A-11. DC Shield Assembly 16, DCA Circuit Board
A-11-1 Remove the side panels L and R. (See procedure 1)
A-11-2 Fix the control panel assembly 16. (See procedure 2)
A-11-3 Remove the JK circuit board. (See procedure A-4)
A-11-4 Remove the DA circuit board. (See procedure A-5)
A-11-5 DC Shield Assembly 16 
  (Time required: About 11 minutes):
A-11-5-1 Remove the AC bottom shield. 
 (See procedure A-9-8)
A-11-5-2 Remove the two (2) screws marked [62A]. The 
DA-JK angle L can then be removed. (Fig. 5)
A-11-5-3 Remove the three (3) screws marked [242A]. The DC 
shield assembly 16 can then be removed. (Fig. 5)
A-11-6 DCA Circuit Board 
  (Time required: About 13 minutes):
A-11-6-1 Remove the DC shield assembly 16. 
 (See procedure A-11-5)
A-11-6-2 Remove the nine (9) screws marked [352A]. The 
DCA circuit board can then be removed. (Fig. 6)
A-12. Duct Assembly 16, DC Fan Motor
A-12-1 Remove the side panels L and R. (See procedure 1)
A-12-2 Fix the control panel assembly 16. (See procedure 2)
A-12-3 Remove the JK circuit board. (See procedure A-4)
A-12-4 Remove the DA circuit board. (See procedure A-5)
A-12-5 Remove the AC bottom shield. 
 (See procedure A-9-8)
A-12-6 Remove the duct top 16. (See procedure A-10-5)
A-12-7 Remove the DC shield assembly 16. 
 (See procedure A-11-5)
A-12-8 Remove the screw marked [209A]. The ferrite 
support can then be removed. (Fig. 6)
A-12-9 Duct Assembly 16 
  (Time required: About 13 minutes):
A-12-9-1 Remove the two (2) screws marked [202]. The 
duct assembly 16 can then be removed. (Fig. 6)
A-12-10 DC Fan Motor (Time required: About 14 minutes):
A-12-10-1 Remove the duct assembly 16. 
 (See procedure A-12-9)
A-12-10-2 Remove the four (4) screws marked [D60]. The 
DC fan motor can then be removed. (Photo 7)

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							33 LS9-16/LS9-32
B.  LS9-16 Disassembly Procedure of Control Panel Assembly

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[22]:  Bind Head Tapping Screw-B
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[24]: Bonding Tapping Screw-B
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[72A]: Bind Head Tapping Screw-B
¢#» Ä´#*/%£3.0X8 MFZN2B3 (WE774400)
[92A]:  Bind Head Tapping Screw-B
¢#» Ä´#*/%£3.0X8 MFZN2B3 IT (WE997400)
[97]:  Bind Head Tapping Screw-B
¢#» Ä´#*/%£3.0X8 MFZN2B3 IT (WE997400)
Fig. 7
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B-1.  LCD Assembly 16 
 
(Time required: About 6 minutes)
B-1-1 
Remove the side panels L and R. (See procedure 1)
B-1-2 Fix the control panel assembly 16. (See procedure 2)
B-1-3 Remove the two (2) screws marked [92A]. The LCD 
shield angle assembly can then be removed. (Fig. 7)
B-1-4 Remove the two (2) screws marked [97A] and two 
(2) screws marked [97B]. The two (2) panel angle 
brackets 2 can then be removed. (Fig. 7)
B-1-5 Remove the three (3) screws marked [22G], screw 
marked [22H], screw marked [24A] and two (2) 
screws marked [24B]. The LCD assembly 16 can 
then be removed. (Fig. 7)
  *   When installing the LCD assembly 16 to the 
control panel assembly 16, tighten the screw 
marked [24A] fi rst and then tighten the three (3) 
screws marked [22G] and screw marked [22H], 
two (2) screws marked [24B]. Finally, tighten 
the screws in the order of [97A] 
→ [97B] to 
install the panel angle bracket 2. (Fig. 7)
  *   See page 48 for removing procedures of the 
LCD assembly.
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							LS9-16/LS9-32
34
Fig. 8
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[150A]
[160A]
[170A] Control Panel Assembly 16
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£LCD Assembly 16
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10
5
0
5
• Mounting direction of the fader knob

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The concave side should be to the right.
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B-2. FD Circuit Board
   (Time required: About 7 minutes)
B-2-1 Remove the side panels L and R. (See procedure 1)
B-2-2  Remove the control panel assembly 16. 
  (See procedure 2)
B-2-3 Remove the sixteen (16) fader knobs marked 
[150A] and the fader knob marked [160A] from the 
control panel side. (Fig. 8)
B-2-4 Remove the ten (10) screws marked [72A]. The 
FD circuit board can then be removed. (Fig. 7)
  *   When installing the fader knob, the concave 
side of the fader knob should be to the right. 
(Fig. 8)
  *   The FD circuit board is used for the following 
channels:
    · FD circuit board:  CH 1 – 16 + STEREO
#
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							35 LS9-16/LS9-32
[22I]:   Bind Head Tapping Screw-B
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[32B]: Bind Head Tapping Screw-B
¢#» Ä´#*/%£3.0X8 MFZN2B3 (WE774400)
[42B]: Bind Head Tapping Screw-B
¢#» Ä´#*/%£3.0X8 MFZN2B3 (WE774400)
[52B]: Bind Head Tapping Screw-B
¢#» Ä´#*/%£3.0X8 MFZN2B3 (WE774400)
[62B]: Bind Head Tapping Screw-B
¢#» Ä´#*/%£3.0X8 MFZN2B3 (WE774400)
Fig. 9
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STIN2
STIN1[32B]
[42B]
[62B]
[52B]
PNIN
Cable holder A
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PNIN angle bracket 
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[22I]
B-3.  PNIN Circuit Board 
  (Time required: About 10 minutes)
B-3-1 
Remove the side panels L and R. (See procedure 1)
B-3-2  Remove the control panel assembly 16. 
  (See procedure 2)
B-3-3  Remove the FD circuit board. (See procedure B-2)
B-3-4 Remove the three (3) screws marked [62B]. The 
cable holder A can then be removed. (Fig. 9)
B-3-5 Remove the three (3) screws marked [22I] and 
twelve (12) screws marked [32B]. The PNIN 
angle bracket and PNIN circuit board can then be 
removed. (Fig. 9)
  *   The PNIN circuit board contains the following 
buttons. (Photo 8)
    · [20]: Button L (Gray)   4 pcs.
    · [30]: Button L (Blue)   4 pcs.
    · [40]: Button L (White)   4 pcs.
  *   The PNIN circuit board is used for the following 
channels:
    · PNIN circuit board: CH 1 − 16
#
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							LS9-16/LS9-32
36
Photo 8
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[40]: Button L (White)

 
						

							37 LS9-16/LS9-32
Photo 10
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[20a]: Button S (White)

 
						

							LS9-16/LS9-32
38
C.  LS9-32 Disassembly Procedure of Bottom Assembly Section

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C-1.  CPU Circuit Board 
 
(Time required: About 6 minutes)
C-1-1 
Remove the side panels L and R. (See procedure 1)
C-1-2  Remove the control panel assembly 32. 
  (See procedure 2)
C-1-3 Remove the two (2) screws marked [322C] and 
two (2) screws marked [322D]. The CPU circuit 
board can then be removed. (Fig. 10)
 *  
MAC (Media Access Control) address is stored 
in the CPU circuit board. If the CPU circuit board 
is replaced, MAC address will be changed.
C-2.  Replacing the Lithium Battery 
  (Time required: About 5 minutes)
C-2-1 
Remove the side panels L and R. (See procedure 1)
C-2-2  Remove the control panel assembly 32. 
  (See procedure 2)
C-2-3  Replace the lithium battery. (See procedure A-2-3)
C-3.  HAAD2 (1/4 - 4/4) Circuit Boards
C-3-1 Remove the side panels L and R. (See procedure 1)
C-3-2 Fix the control panel assembly 32. (See procedure 2)
C-3-3  HAAD2 (1/4) Circuit Board 
  (Time required: About 8 minutes):
C-3-3-1 Remove the sixteen (16) screws marked [362C] 
and two (2) screws marked [364C]. The HAAD2 
(1/4) circuit board can then be removed. (Fig. 10)
C-3-4  HAAD2 (2/4) Circuit Board 
  (Time required: About 11 minutes):
C-3-4-1 Remove the HAAD2 (1/4) circuit board. 
  (See procedure C-3-3)
C-3-4-2 Remove the sixteen (16) screws marked [362D], 
two (2) screws marked [364D], and two (2) screws 
marked [52C]. The HA angle and HAAD2 (2/4) 
circuit board can then be removed. (Fig. 10)
C-3-5  HAAD2 (3/4) Circuit Board 
  (Time required: About 8 minutes):
C-3-5-1 Remove the sixteen (16) screws marked [362E] 
and two (2) screws marked [364E]. The HAAD2 
(3/4) circuit board can then be removed. (Fig. 10)
C-3-6  HAAD2 (4/4) Circuit Board 
  (Time required: About 11 minutes):
C-3-6-1 Remove the HAAD2 (3/4) circuit board. 
  (See procedure C-3-5)
C-3-6-2 Remove the sixteen (16) screws marked [362F], 
two (2) screws marked [364F], and two (2) screws 
marked [52D]. The HA angle and HAAD2 (4/4) 
circuit board can then be removed. (Fig. 10)
 *  
The circuit boards from HAAD2 (1/4) through 
HAAD2 (4/4) are used for the following channels:
    · HAAD2 (1/4) circuit board: INPUT CH 1 – 8
    · HAAD2 (2/4) circuit board: INPUT CH 9 – 16
    · HAAD2 (3/4) circuit board: INPUT CH 17 – 24
    · HAAD2 (4/4) circuit board: INPUT CH 25 – 32
$
 $16
						

							39 LS9-16/LS9-32
[52]:  Bind Head Tapping Screw-B
¢#» Ä´#*/%£3.0X6 MFZN2B3 (WF028600)
[322]:  Bind Head Tapping Screw-B
¢#» Ä´#*/%£3.0X6 MFZN2B3 (WF028600)
[362]: Bonding Tapping Screw-B
¢#» Ä´#0/%£3.0X8 MFZN2B3 (WE774100)
[364]:  Bind Head Tapping Screw-B
¢#» Ä´#*/%£3.0X6 MFZN2B3 (WF028600)
[372]: Bonding Tapping Screw-B
¢#» Ä´#0/%£3.0X8 MFZN2B3 (WE774100)
[374]:  Bind Head Tapping Screw-B
¢#» Ä´#*/%£3.0X6 MFZN2B3 (WF028600)
[382B]: Bonding Tapping Screw-B
¢#» Ä´#0/%£3.0X8 MFZN2B3 (WE774100)
[384B]:  Bind Head Screw
¢	–É´´#*/%£3.0X6 MFZN2B3 (WE878300)
[386B]:  Bind Head Tapping Screw-B
¢#» Ä´#*/%£3.0X6 MFZN2B3 (WF028600)
[392]: Bonding Tapping Screw-B
¢#» Ä´#0/%£3.0X8 MFZN2B3 (WE774100)
$BCMF
IPMEFS
$
¢
¢{Úé$£ )
BOHMF
¢)Úé£
JK
(1/4) (2/4)(4/4)
(1/2)
DCD
[52C](3/4)
[322D]
CPU support A
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CPU
DSP32
[364C][364D]
[364E][386B]
[374B] [364F]
[322C]
[52C][52D]
[52D]
(2/2)
[374B]
[374C]
[374C]
DSP32
DA
CPU
HAAD2HAAD2
HAAD2
LAMP
PHN
DA

JK
DA
[384B][372B] x 16
[392]
[392]
[362C] x 16[362E] x 16
[362D] x 16[362F] x 16[372C] x 16
[382B]
HAAD2(2/4)
HAAD2(1/4)
HAAD2(3/4)HAAD2(4/4) (1/2)DA(2/2)
LAMP
HAAD2
Fig. 10
¢
$£ 
						

							LS9-16/LS9-32
40
C-4.  LAMP Circuit Board 
  (Time required: About 6 minutes)
C-4-1 
Remove the side panels L and R. (See procedure 1)
C-4-2 Fix the control panel assembly 32. (See procedure 2)
C-4-3 Remove the two (2) screws marked [392]. The 
LAMP circuit board can then be removed. (Fig. 10)
C-5.  JK Circuit Board 
  (Time required: About 6 minutes)
C-5-1 
Remove the side panels L and R. (See procedure 1)
C-5-2 Fix the control panel assembly 32. (See procedure 2)
C-5-3 Remove the two (2) screws marked [386B]. (Fig. 10)
C-5-4  Remove the three (3) screws marked [382B] and 
two (2) screws marked [384B]. The JK circuit 
board can then be removed. (Fig. 10)
C-6.  DA (1/2, 2/2) Circuit Boards
C-6-1 Remove the side panels L and R. (See procedure 1)
C-6-2 Fix the control panel assembly 32. (See procedure 2)
C-6-3  Remove the JK circuit board. (See procedure C-5)
C-6-4  DA (1/2) Circuit Board 
  (Time required: About 9 minutes):
C-6-4-1 Remove the two (2) screws marked [374B]. The 
cable holder C can then be removed. (Fig. 10)
C-6-4-2 Remove the sixteen (16) screws marked [372B]. 
The DA (1/2) circuit board can then be removed. 
(Fig. 10)
C-6-5  DA (2/2) Circuit Board 
  (Time required: About 11 minutes):
C-6-5-1 Remove the DA (1/2) circuit board. (See procedure 
C-6-4)
C-6-5-2 Remove the sixteen (16) screws marked [372C] 
and two (2) screws marked [374C]. The DA (2/2) 
circuit board can then be removed. (Fig. 10)
  *   The earth sheet DA is not part of the DA circuit 
board. The earth sheet DA is soldered to the 
DA circuit board. When replacing the DA circuit 
board, remove the solder to remove the earth 
sheet DA from the DA circuit board and solder 
it to the new circuit board. (Photo 6)
  *   The DA (1/2) circuit board and DA (2/2) circuit 
board are used for the following channels:
    · DA (1/2) circuit board: OMNI OUT CH 1 – 8
    · DA (2/2) circuit board: OMNI OUT CH 9 – 16
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