Yamaha P 2500 Service Manual

							P1000S/P2500S/P3500S11
• Top view
PA
OUT1
[A]
Power transformer ¢?oÄåïµ£
DC fan¢DC
Diode stack
¢¼ ¦”ŵ»¿«£
PA unit
¢PAâÇ¿Ä£
+
[110]
[115]
P2500S, P3500S only
¢P2500S zP3500Swˆ£
VRPSW
OUT2
IN
Soldering
¢
R>
ÇZ£
DC
[60]: Bind Head Tapping Screw-S  	
						

							P1000S/P2500S/P3500S
12
• Rear viewSpeaker terminal cover
¢SP»”ÛÆç§Ì”£
[530]
• Rear view
[340]
P2500S, P3500S only
¢P2500SzP3500Swˆ£[C]
P2500S, P3500S only
¢P2500SzP3500Swˆ£[350]
P2500S, P3500S only
¢P2500SzP3500Swˆ£[C]
P2500S, 
P3500S only
¢P2500Sz P3500Swˆ
£
OUT1
OUT2
OUT2
Soldering ¢
R>
ÇZ£
Earth film
¢ž”µÑŸçÜ£
H, B, A, W, K destination only ¢H, B, A, W, K “²wˆ£
5. OUT2 Circuit Board (P1000S model)
(Time required: About 3 minutes)
OUT1/OUT2 Circuit Boards (P2500S,P3500S models)
(Time required: About 4 minutes)
5-1 Remove the top cover. (See procedure 1.)
5-2 Remove the two (2) screws marked [530]. The speaker terminal cover can then be removed.
(Photo.4)
5-3 OUT2 Circuit Board (P1000S model):
5-3-1 Remove the two (2) screws marked [340]. (Photo.5)
5-3-2 Remove the solder of W301B (earth wire). The
OUT2 circuit board can then be removed. (Photo.1)
5-4 OUT1/OUT2 Circuit Boards
(P2500S,P3500S models):
5-4-1 Remove the two (2) screws marked [340], the four (4) screws marked [350] and the two (2) hexagonal
nuts marked [C]. (Photo.5)
5-4-2 Remove the solder of W301B (earth wire). The
OUT1/OUT2 circuit boards can then be removed.
(Photo.1)
5-4-3 W ith H,B,A,W,K models, remove the earth film
soldered to the OUT2 circuit board. (Photo.6)
      
When you replace the OUT2 circuit board, be sure
to attach the speaker terminal cover as before.
      
The earth film is not part of the OUT2 circuit board.
When you replace the OUT2 circuit board, you
should remove the earth film from the OUT2 circuit
board, and install in the new OUT2 circuit board.  065 
						

							P1000S/P2500S/P3500S13
• Top view • Right side view • Left side view
• Bottom view
Cord holder
¢ ï³áé¿«» £
Cord holder
¢ ï³áé¿«» £
Power transformer ¢?oÄåïµ£
VR
DC
DC
[440]
[440]
[460]
[440]
[440]
Front panel 1¢ÑéïÄÍÉç 1£
Front panel 1¢ÑéïÄÍÉç 1£
Front panel 1¢ÑéïÄÍÉç 1£
Rack angle bracket
¢å¿«žï¬ç£
Rack angle bracket (Right side)¢å¿«žï¬ç	È
£
Rack angle bracket ¢å¿«žï¬ç£
Rack angle bracket (Left side)
¢å¿«žï¬ç	(
£
[460]
 
						

							P1000S/P2500S/P3500S
14
• Front view• Front view
• Rear view
Attenuation knob¢ž¿ÂÉ”»”ÊÒ£ DC fan
¢DC
[D]
[170]
[170]
Front panel 1¢ÑéïÄÍÉç1£ [230]
VR
LED
[230]
[D]
9. LED Circuit Board
(Time required: About 4 minutes)
9-1 Remove the top cover. (See procedure 1.)
9-2 Remove the front panel 1. (See procedure 6.)
9-3 Remove the two (2) screws marked [230]. The LED circuit board can then be removed. (Photo.13)  -&% 
						

							P1000S/P2500S/P3500S15
• Rear view • Front view
[420][420]Front panel 1
¢ÑéïÄÍÉç 1£
Handle angle¢ËïÅçžï¬ç£
[420]
[420]
[420]
Handle angle¢ËïÅçžï¬ç£
[420]
Front panel 1¢ÑéïÄÍÉç 1£Front panel 2¢ÑéïÄÍÉç 2£
[390]
[390][390]
[390]
Handle¢ËïÅç£ Handle¢ËïÅç£
Handle angle¢ËïÅçžï¬ç£Handle angle¢ËïÅçžï¬ç£
[390]
[390]
[390]
[390]
Power switch knob
¢PSWÊÒ£ Front panel 1
¢ÑéïÄÍÉç 1£
[200]
PSW
• Bottom view
[30] Main chassis
¢Ý ï³ß”³
£¢Ý ï³ß”³£Main chassis
¢Ý ï³ß”³£
• Front view • Front view
* The shape of the power switch knob is different from the product.
¢PSWÊÒw	Ýxz
\ˆ
¼qŸs“‡b{£
• PA unit¢PAâÇ¿Ä£
• Left side view
• Top view
• Right side view
PA
PA
PA
P1000S, P2500S: not installed
¢°î
÷£ P1000S: not installed
¢°î
÷£ P1000S, P2500S: not installed
¢°î
÷£
[P40]
P1000S, P2500S: not installed
¢°î
÷£
[P70]
P1000S: not installed ¢°î
÷£ P1000S, P2500S: not installed
¢°î
÷£
[P70]
[420]: Bind Head Screw 
	
						

							P1000S/P2500S/P3500S
16
IC BLOCK DIAGRAM
NJM2068D-D (XA987A00)
Dual Operational Amplifier
DC: IC403,404
NJM2068MD-T1  (XJ553A00)
Dual Operational Amplifier
P1000S IN: IC301–303
P2500S/P3500S IN: IC301–307
1
2
3
4-V
8
76
5Output A+V
Non-Inverting Input A
-DC Voltage Supply +DC Voltage
Supply
Output B
Inverting
Input B
Non-Inverting
Input B
Inverting
Input A+-
+-
1
2
3
4-V
8
76
5Output A+V
Non-Inverting Input A
-DC Voltage Supply +DC Voltage
Supply
Output B
Inverting
Input B
Non-Inverting
Input B
Inverting
Input A+-
+-
Note: See parts list for details of circuit board component parts.
DC Circuit Board  (X3499B0) ......................... 21
DC Circuit Board  (X3499C0) ................... 18/20
IN Circuit Board  (X3501B0) .......................... 16
IN Circuit Board  (X3501C0) .......................... 17
PA Circuit Board  (X3500B0) .................... 22/23
SUB (LED) Circuit Board  (X3895B0) ....... 24/25
 
CONTENTS
CIRCUIT BOARDS
SUB (OUT1) Circuit Board  (X3895B0)
(P2500S, P3500S only) ........... 24/25
SUB (OUT2) Circuit Board  (X3895B0) .... 24/25
SUB (PSW) Circuit Board  (X3895B0) ........... 20
SUB (VR) Circuit Board  (X3895B0) ......... 18/19
 
IN Circuit Board (X3501B0)
Component side Pattern side
OFF/SUB WOOFER/LOW CUT
A
(P2500S, P3500S only)
INPUT B STEREO/BRIDGE/PARALLEL
to VR-CN602
FREQUENCY B
(P2500S, P3500S only)
FREQUENCY A
(P2500S, P3500S only)
to DC-CN417
to OUT2-W301BINPUT A
LOW CUT/SUB WOOFER/OFF B
(P2500S, P3500S only) P1000S:
P2500S, P3500S: HPF 40Hz ON/OFF
YS Processing ON/OFF
¥ Addition wire (P2500S/P3500S)
¢*$ Òé¿«
$£
¢èÍ£
«³”Äw
æ
¼	ÄIxÍ”ÀæµÄ›]€	°Xi^M{
¢³”Ä,
X
$£
¢
æ
¼£ ¢Í»”ï£ 
						

							17
P1000S/P2500S/P3500S
OFF/SUB WOOFER/LOW CUT
A
(P2500S, P3500S only)
INPUT B STEREO/BRIDGE/PARALLEL
to VR-CN602
FREQUENCY B
(P2500S, P3500S only)FREQUENCY A
(P2500S, P3500S only)
to DC-CN417
to OUT2-W301BINPUT A
LOW CUT/SUB WOOFER/OFF B
(P2500S, P3500S only) P1000S:
P2500S, P3500S: HPF 40Hz ON/OFF
YS Processing ON/OFF
 
IN Circuit Board (X3501C0)
Component side
Pattern side ¢
æ
¼£
¢Í»”ï£ 
						

							P1000S/P2500S/P3500S
18
to Fanto Power transformer
to LED-CN601
A
A
to PA-CN101
to PA-CN104
to PA-CN103to OUT2-W605
to PA-CN102 
DC Circuit Board (X3499C0)
 SUB (VR) Circuit Board
ATT B ATT Ato IN-CN302
Component side¢
æ
¼£ 
						

							19
P1000S/P2500S/P3500S
to IN-CN301
to Power transformer
(CN407: P3500S only)
not used
A
Ato Power transformerto PSW-W601
to PSW-W603to PSW-W602 (P3500S only)
to AC IN
Component side
 
SUB (VR) Circuit Board
Pattern side ¢
æ
¼£
¢Í»”ï£ 
						

							P1000S/P2500S/P3500S
20
BB  DC Circuit Board (X3499C0)
ON/    OFF
to DC-CN402
(P3500S only)
to DC-CN401to DC-CN403
  SUB (PSW) Circuit Board
Component side Pattern side¢
æ
¼£¢Í»”ï£