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...

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...

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...

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...

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£