Yamaha Ls 9 Service Manual

							41 LS9-16/LS9-32
DCD
DSP32

[342B]
[332C] [72B]
[62C]
[332D] [342B]
[230B]
[334B][100B]
[312E]
[312F]
[312D]
[502B] [218C]
[218C]
[212B]
[213]
[212B]
[209B]
[209B]
PHN
CPU support A
¢$16±Ù”Ä£CPU support B
¢$16±Ù”Ä#£[312F]
[204]


DAJK angle L 32
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							LS9-16/LS9-32
42
C-9.  DSP32 Circuit Board 
  (Time required: About 13 minutes)
C-9-1 
Remove the side panels L and R. (See procedure 1)
C-9-2  Remove the control panel assembly 32. 
  (See procedure 2)
C-9-3 
Remove the CPU circuit board. (See procedure C-1)
C-9-4  Remove the HAAD2 (3/4, 4/4) circuit boards.
  (See procedures C-3-5 and C-3-6)
C-9-5 Remove the two (2) screws marked [312D] and 
two (2) screws marked [312E]. The CPU supports 
A and B can then be removed. (Fig. 11)
C-9-6 
Remove the five (5) screws marked [312F]. The 
DSP32 circuit board can then be removed. (Fig. 11)
C-10. ACIN Circuit Board, AC Inlet Assembly, 
AC Bottom Shield 32
C-10-1 Remove the side panels L and R. (See procedure 1)
C-10-2 Fix the control panel assembly 32. 
  (See procedure 2)
C-10-3 ACIN Circuit Board 
  (Time required: About 6 minutes):
C-10-3-1 Remove the three (3) screws marked [212B] and 
screw marked [213]. The ACIN circuit board can 
then be removed. (Fig. 11)
  *   The power switch knob is not part of the ACIN 
circuit board. When replacing the ACIN circuit 
board, remove the power switch knob from 
the ACIN circuit board and install it on the new 
circuit board. (Photo 7)
C-10-4 AC Inlet Assembly 
  (Time required: About 6 minutes):
C-10-4-1 Remove the two (2) screws marked [502B]. (Fig. 11)
C-10-4-2 Remove the screw marked [230B]. The earth can 
then be removed. (Fig. 11)
C-10-4-3 Remove the AC inlet assembly. (Fig. 11)
C-10-5 AC Bottom Shield 32 
  (Time required: About 7 minutes):
C-10-5-1 Remove the AC inlet assembly. (See procedure 
C-10-4)
C-10-5-2 Remove the four (4) screws marked [218C]. The AC 
bottom shield 32 can then be removed. (Fig. 11)
C-11. Power Supply Unit 
  (Time required: About 13 minutes)
C-11-1 
Remove the side panels L and R. (See procedure 1)
C-11-2 Fix the control panel assembly 32. 
  (See procedure 2)
C-11-3 Remove the AC bottom shield 32. (See procedure 
C-10-5)
C-11-4 
Remove the six (6) screws marked [209B]. The duct 
top 32 assembly can then be removed. (Fig. 11)
C-11-5 Remove the four (4) screws marked [302B] and 
screw marked [303B]. The power supply unit can 
then be removed. (Fig. 12)
$
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							43 LS9-16/LS9-32
[206B]:  Bind Head Tapping Screw-B
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[302B]:  Bind Head Tapping Screw-B
¢#» Ä´#*/%£3.0X6 MFZN2B3 (WF028600)
[303B]:  Bind Head Tapping Screw-B
¢#» Ä´#*/%£3.0X8 MFZN2B3 IT (WE997400)
[352B]:  Bind Head Tapping Screw-B
¢#» Ä´#*/%£3.0X6 MFZN2B3 (WF028600)
Fig. 12
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C-12. DC Fan Motor, DCA Circuit Board
C-12-1 Remove the side panels L and R. (See procedure 1)
C-12-2 Fix the control panel assembly 32. 
  (See procedure 2)
C-12-3 Remove the JK circuit board. (See procedure C-5)
C-12-4 Remove the DA (1/2, 2/2) circuit boards. 
  (See procedure C-6)
C-12-5 Remove the AC bottom shield 32. (See procedure 
C-10-5)
C-12-6 Remove the duct top 32 assembly. (See procedure 
C-11-4)
C-12-7 Remove the two (2) screws marked [62C], two (2) 
screws marked [72B] and 
three (3) screws marked 
[206B]. The duct side assembly 32 can then be 
removed together with the 
DAJK angle L 32 and 
DAJK angle R 32
. (Fig. 11, Fig. 12)
C-12-8 DC Fan Motor (Time required: About 10 minutes):
C-12-8-1 Remove the four (4) screws marked [204]. The DC 
fan motor can then be removed together with the 
fi nger guard and fan holder 32. (Fig. 11)
 *  
The fan holder 32 is not part of the DC fan 
motor. When replacing the DC fan motor, 
remove the fan holder 32 from the DC fan motor 
and install it to the new DC fan motor.
C-12-9 DCA Circuit Board 
  (Time required: About 11 minutes):
C-12-9-1 Remove the nine (9) screws marked [352B]. The 
DCA circuit board can then be removed. (Fig. 12)   *   The earth fi lm is not part of the power supply 
unit. When replacing the power supply unit, 
remove the earth film from the power supply 
unit and install it on the new power supply 
unit. (Fig. 12)
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							LS9-16/LS9-32
44
D.  LS9-32 Disassembly Procedure of Control Panel Assembly

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Fig. 13
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[24]: Bonding Tapping Screw-B
¢#» Ä´#0/%£3.0X8 MFZN2B3 (WE774100)
[72C]:  Bind Head Tapping Screw-B
¢#» Ä´#*/%£3.0X8 MFZN2B3 (WE774400)
[82]:  Bind Head Tapping Screw-B
¢#» Ä´#*/%£3.0X8 MFZN2B3 (WE774400)
[92B]:  Bind Head Tapping Screw-B
¢#» Ä´#*/%£3.0X8 MFZN2B3 IT (WE997400)
[97]:  Bind Head Tapping Screw-B
¢#» Ä´#*/%£3.0X8 MFZN2B3 IT (WE997400)
D-1.  LCD Assembly 32 
  (Time required: About 6 minutes)
D-1-1 
Remove the side panels L and R. (See procedure 1)
D-1-2 Fix the control panel assembly 32. (See procedure 2)
D-1-3 Remove the two (2) screws marked [92B]. The LCD 
shield angle assembly can then be removed. (Fig. 13)
D-1-4 Remove the two (2) screws marked [97C], two (2) 
screws marked [97D] and two (2) screws marked 
[97E]. The two (2) panel angle brackets 2 can then 
be removed. (Fig. 13)
D-1-5 Remove the three (3) screws marked [22J], screw 
marked [22K], screw marked [24C] and two (2) 
screws marked [24D].
The LCD assembly 32 can 
then be removed. (Fig. 13)
  *   When installing the LCD assembly 32 to the 
control panel assembly 32, tighten the screw 
marked [24C] fi rst and then tighten the three (3) 
screws marked [22J] and screw marked [22K], 
two (2) screws marked [24D]. Finally, tighten 
the screws in the order of [97C] 
→ [97D] 
→ [97E] 
to install the panel angle bracket 2. (Fig. 13)
  *   See page 48 for removing procedures of the 
LCD assembly.
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							45 LS9-16/LS9-32
Fig. 14
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[150B]
[160B]
[170A] Control Panel Assembly 32
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[150C]
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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D-2.  FD Circuit Board, FD2 Circuit Board
D-2-1 Remove the side panels L and R. (See procedure 1)
D-2-2  Remove the control panel assembly 32. 
  (See procedure 2)
D-2-3 
FD Circuit Board (Time required: About 7 minutes):
D-2-3-1
 Remove the sixteen (16) fader knobs marked 
[150B] and the fader knob marked [160B] from the 
control panel side. (Fig. 14)
D-2-3-2 Remove the ten (10) screws marked [72C]. The 
FD circuit board can then be removed. (Fig. 13)
D-2-4 
FD2 Circuit Board (Time required: About 7 minutes):
D-2-4-1
 Remove the sixteen (16) fader knobs marked 
[150C] from the control panel side. (Fig. 14)
D-2-4-2 Remove the eight (8) screws marked [82]. The 
FD2 circuit board can then be removed. (Fig. 13)
 *  
When installing the fader knob, the concave side 
of the fader knob should be to the right. (Fig. 14)
  *   The FD circuit board and FD2 circuit board are 
used for the following channels:
    ·  FD circuit board:  CH 17 − 32 + STEREO
    ·  FD2 circuit board:  CH 1 − 16
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							LS9-16/LS9-32
46
Fig. 15
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[32]:  Bind Head Tapping Screw-B
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[42C]:  Bind Head Tapping Screw-B
¢#» Ä´#*/%£3.0X8 MFZN2B3 (WE774400)
[52E]:  Bind Head Tapping Screw-B
¢#» Ä´#*/%£3.0X8 MFZN2B3 (WE774400)
[62D]:  Bind Head Tapping Screw-B
¢#» Ä´#*/%£3.0X8 MFZN2B3 (WE774400)
[66]:  Bind Head Tapping Screw-B
¢#» Ä´#*/%£3.0X8 MFZN2B3 (WE774400)
[42C]
[52E]
[42C]
Cable holder A
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Cable holder B
¢
¢{Úé #£PNIN angle bracket
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STIN2
STIN1
PNIN
PNIN

(1/2)(2/2)
[66][32C]
[32C]
[32C]
[62D]
[32D] [32D]
[32D] [32D]
[32D][32D][22L][22L]
[22L]
D-3.  PNIN (1/2, 2/2) Circuit Boards
D-3-1 Remove the side panels L and R. (See procedure 1)
D-3-2  Remove the control panel assembly 32. 
  (See procedure 2)
D-3-3 PNIN (1/2) Circuit Board 
  (Time required: About 9 minutes):
D-3-3-1 Remove the FD2 circuit board. (See procedure 
D-2-4)
D-3-3-2 Remove the two (2) screws marked [66]. The cable 
holder B can then be removed. (Fig. 15)
D-3-3-3 Remove the eleven (11) screws marked [32C]. 
The PNIN (1/2) circuit board can then be removed. 
(Fig. 15)
D-3-4 PNIN (2/2) Circuit Board 
  (Time required: About 9 minutes):
D-3-4-1 Remove the FD circuit board. (See procedure 
D-2-3)
D-3-4-2 Remove the three (3) screws marked [62D]. The 
cable holder A can then be removed. (Fig. 15)
D-3-4-3 Remove the three (3) screws marked [22L] and 
twelve (12) screws marked [32D]. The PNIN angle 
bracket and PNIN (2/2) circuit board can then be 
removed. (Fig. 15)
  *   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.
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							47 LS9-16/LS9-32
Photo 11
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[10c]: Button L (White)

 
						

							LS9-16/LS9-32
48
E.  Disassembly Procedure of LCD Assembly

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[22M]:  Bind Head Tapping Screw-B
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[32E]:  Bind Head Tapping Screw-B
¢#» Ä´#*/%£3.0X8 MFZN2B3 (WE774400)
[52]:  Bind Head Tapping Screw-B
¢#» Ä´#*/%£3.0X8 MFZN2B3 IT (WE997400)
[62E]:  Bind Head Tapping Screw-B
¢#» Ä´#*/%£3.0X8 MFZN2B3 (WE774400)
YAMAHA
PNMS
PNDA
INV
LCD
¢÷	¥ÃŸµÓè £[110] [120]
[22Q][140]
[130] [150]
ENC
LCD holder assembly
¢-$%{ÚéAss’y£[22M]
[62E]
[32E] [52F] [52G]




Fig. 16
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  *   Before disassembling the LCD assembly, 
prepare a soft cloth to put it on so as not to 
damage the LCD during disassembly.
 
						

							49 LS9-16/LS9-32
Photo 13
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Photo 14
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[110][110][110][72D][72D][72D]
E-1.  ENC Circuit Board, PNMS Circuit Board
E-1-1  LS9-16: Remove the LCD assembly 16. 
    (See procedure B-1)
  LS9-32: Remove the LCD assembly 32. 
    (See procedure D-1)
E-1-2  Tie a string or the like to the encoder knob marked 
[110]. Then, pull the string to remove the encoder 
knob marked [110] from the control panel side. 
(Photo 13)
E-1-3  Remove the encoder knob marked [120], three (3) 
encoder knobs marked [130], three (3) encoder 
knobs marked [140], and the encoder knob 
marked [150] from the control panel side. (Fig. 16)
E-1-4  Remove the nut marked [72D]. (Photo 14)
E-1-5 ENC Circuit Board 
  (Time required: About 10 minutes):
E-1-5-1 Remove the ENC circuit board. (Fig. 16)
  *   The ENC circuit board is soldered. Before 
removing the ENC circuit board, remove the 
solder to remove the cable. (Photo 15)
E-1-6 PNMS Circuit Board  
  (Time required: About 10 minutes):
E-1-6-1 Remove the eight (8) screws marked [22Q]. The 
PNMS circuit board and ENC circuit board can 
then be removed. (Fig. 16)
  *   The ENC circuit board is not part of the PNMS 
circuit board. When replacing the PNMS circuit 
board, remove the ENC circuit board and install 
it to the new PNMS circuit board.
  *   Tighten the screws in the order of screw q
 
g
 screw w
 g
 the other screws to install the 
PNMS circuit board. (Fig. 16)
  *   The PNMS circuit board contains the following 
buttons. (Photo 16)
    · [40a]: Button S (White)  1 pc.
    · [40b]: Button S (Gray)  4 pcs.
    · [40c]: Button S (Gray)  1 pc.
    · [40e]: Button L (Black)  7 pcs.
StringString
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String
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[72D]: Hexagonal Nut
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							LS9-16/LS9-32
50
Photo 15
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Photo 16
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E-2.  INV Circuit Board, LCD 
E-2-1  LS9-16: Remove the LCD assembly 16. 
    (See procedure B-1)
  LS9-32: Remove the LCD assembly 32. 
    (See procedure D-1)
E-2-2 
INV Circuit Board (Time required: About 7 minutes):
E-2-2-1
 Remove the four (4) screws marked [62E]. The 
INV circuit board can then be removed. (Fig. 16)
E-2-3 LCD (Time required: About 7 minutes each):
E-2-3-1 Remove the screw marked [52F] and the screw 
marked [52G]. The LCD holder assembly can then 
be removed. (Fig. 16)
 *  
When installing the LCD holder assembly, 
tighten the screw marked [52F] temporarily fi rst, 
and then, with the portion A of the LCD holder 
assembly placed against the portion B of the 
LCD panel, tighten the screw marked [52G] and 
tighten the screw marked [52F] that has been 
tightened temporarily. (Fig. 16, Fig. 17)
E-2-3-2 Remove the screw marked [42D]. The LCD can 
then be removed. (Fig. 17)
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