Circuit Diagram (Power Amp B. 3/4) - Roland V-Accordion FR-8x Service Notes

July 2013

CIRCUIT DIAGRAM (POWER AMP B. 3/4)

AMPMUTE
R456 10K
CN75
1
TO
2
JACK BOARD
3
(CN15) 4
B4B-PH-K-S
2
AMPMUTE
R458 10K
R459
10K
PGND
76
AVCC+24
R352 220K
R350
15K
AMP_MUTE Q4
1
2SC3326
22K R253
NIU
50V
1nF
C139
PGND PGND
2
R457
PGND
10K
AVCC+24
R353
PGND R354 100K NIU
R355 0
R359 100K NIU
R356 0
PGND
PVCC BZX84C4V7 AVCC+24
PGND
D65
R254 10 ohm
C284 C284 1uF 1uF 1uF C219 C219
25V 25V
NIU NIU
PGND
R351 10K
R358 0
1uF C285
25V
PGND OUTL C295 1uF 25V
C297 1uF 25V
AVCC+24
OUTR AGND_P
R357 10K
OUTL
AMP_MUTE
AVCCB+24
AGND_P
R342 220K
R257
15K
AMP_MUTE Q3
1
2SC3326
22K R255
NIU NIU
PGND PGND
AVCCB+24
R343
PGND
R344 100K NIU
R345 0
R348 100K NIU
R346 0
PGND
PVCC BZX84C4V7 AVCCB+24
PGND
D66
R256 10 ohm
C255 1uF 1uF 1uF C221
25V
NIU
R341 10K R349 0 PGND
1uF 1uF
C258
25V
PGND OUTR C280 1uF 25V C280 1uF 25V
C282 1uF 25V C282 1uF 25V
AVCCB+24
AGND_P
R347 R347 10K 10K
ADP_V_4 PVCC
L48
C165 ACM1211-102-2PL-TL C168
220uF 220uF
1 4
2 3
50V 50V
AMP
PGND
C298 C220
1nF 50V 100nF 50V
U5 U5 PGND
L41
1 28
SD PVCCL
2 27
FAULT PVCCL
EXCML20A390
0
3 26
LINP BSPL
C291 470nF
4 25
LINN OUTPL
24
PGND
5
GAIN0
PGND EXCML20A390
6 23
GAIN1 OUTNL
L50 L50
7 22
AVCC BSNL
8
AGND
21
BSNR
9
GVDD EXCML20A390
PGND
20
OUTNR
10
PLIMIT
L51
19
PGND
PGND C296 470nF
11 18
RINN OUTPR
12 17
RINP BSPR
EXCML20A390
13 16
NC PVCCR
14 15
PBTL PVCCR
TPA3110D2
1nF 50V 100nF 50V
C294 C292
PGND PGND
C283 C222
1nF 50V 100nF 50V
U4 U4 PGND
L43
1 28
SD PVCCL
2 27
FAULT PVCCL
EXCML20A390
0
3 26
LINP BSPL
C276 470nF
4 25
LINN OUTPL
24
PGND
5
GAIN0
EXCML20A390
PGND
6 23
GAIN1 OUTNL
L46
7 22
AVCC BSNL
8
AGND
21
BSNR
9
GVDD
EXCML20A390
PGND
20
OUTNR
10
PLIMIT L47
19
PGND
PGND C281 470nF
11 18
RINN OUTPR
12 17
RINP BSPR
EXCML20A390
13 16
NC PVCCR
14 15
PBTL PVCCR
TPA3110D2 TPA3110D2
1nF 50V 100nF 50V
C279 C277 C277
PGND PGND
PVCC
100uF
C286
50V
C287 L42
1nF 50V C289
CDEPI106NP-150 2,2uF 50V
4 3
1 2
C288
1nF 50V
PGND
2,2uF
C290 50V
PVCC
L49
C293
100uF
50V
TweetL+
TweetL-
PVCC
100uF
C271
50V
C272
CDEPI106NP-150
1nF 50V C274
L44
2,2uF 50V
4 3
1 2
C273
1nF 50V
PGND
2,2uF
C275 50V
PVCC
L45
C278
100uF
50V
FR-8X/XD
CN12
B6B-PH-K-S (LF)(SN)
R+
1
R-
2
L+
3
L-
4
5
6
TO
BELL. BOUNCE
MOTOR B.
(CN1)
77