Yamaha YAS-207 Service Manual page 42

A B
YAS-CU207/ATS-CU2070/NS-WSW42
1
MAIN 4/4
YAS-207 CENTER UNIT_AMPLIFIER SECTION
CN400
XH-6P
+22V +22V
2 22V
1
22V
2
22V
to Power supply unit 3
PGND
4
PGND
5
PGND
PGND
6
DGND
[1/4]
PRI
[1/4] +5V_IN
[1/4]
AC_DET
[1/4] MAMP_SDZ
[1/4]
MAMP_FAULTZ
3 [1/4] AMP_MUTE
[1/4]
VBUS_EN
4
[2/4] FLCH+
[2/4]
FLCH-
[2/4]
FRCH+
[2/4]
FRCH-
[2/4]
USB_5V
[2/4]
USB_DM
[2/4] USB_DP
5
6
7
42
C D
MGLB3216M161T5R0-LF
F400 FB400
0468001NR 160R
1A/63V
R400
0.3R/7+7W
C400
0.1u50V
X7R
C401
R401
1n50V
4.7K
COG
R414 R415
1K 470K
R416
Q401
100K1%
2N3904
Q402
2N3904
R413 R417 R405
100K
3.9K1% 3R3 R406 NC
R418 NC
C419 C420
10n50V 0.1u50V
AC_DET X7R
X7R
DGND
MIDDLE AMP.
DGND DGND
IC401
TPA3116D2DADR
DGND MODSEL
1
1K
R420
2 SDZ
R423 NC
1K
R421
3 FAULTZ
DGND
C417 1uF
4 RINP
C418 1uF
5 RINN
6 PLIMIT
C423 1uF
GVDD
DGND 7
R424 NC
5.6K 8 GAIN/SLV
R419
9 GND
C427 1uF
10 LINP
C428 1uF
11 LINN
R426 1K
12 MUTE
13 AM2
DGND
14 AM1
R427 0R
15 AM0
SYNC 16 SYNC
Fsw=400KHz
AMPLIFIER CONTROL
PIN NAME STATUS ACTION
H ENABLED
SDZ INPUT
L Hi-Z
DGND DGND DGND
H NORMAL
FAULTZ OUTPUT
L FAULT
H Hi-Z
MUTE INPUT
L ENABLED
ENABLE ON USB UPGRADE MODE ONLY!
E F G
YAS-CU207 ATS-CU2070
DC/DC 5V
Rt=150K Fsw=658KHz SNRH1005R-150M
L400
C408 R407
15uH3.6A
0.1u16V
0R +5V
X7R
IC400
EML3193B-00SG08NR
8 BS SW 1
7 VIN EN 2
6 RT COMP 3
5 GND FB 4
DGND
Q400
2N3904
R403 100K
R404
NC
22VB
DGND
L401 6.8uH7.1A
X7R
PVCC COG R430
32
C437
C436 3R3
R429
DGND DGND DGND 680n50V
22R 330p50V
PVCC 31
C438 C440
0.22u25V
C421
BSPR 30 COG 1n50V 10n50V X7R
X5R COG
C432
OUTPR 29 R432 C439 C441
22R 330p50V COG 1n50V 10n50V X7R
GND 28
C433
R431
680n50V
OUTNR 27
3R3
X7R
C424 0.22u25V L402 6.8uH7.1A
BSNR
26
X5R
DGND
GND 25
C425 0.22u25V L403 6.8uH7.1A
BSPL 24
X5R
COG
X7R R448
OUTPL 23 R433 C444
C446
22R 330p50V 3R3
680n50V
GND 22 DGND
COG C448 C450
OUTNL 21 R434 C445 COG 1n50V 10n50V X7R
22R 330p50V
C426 0.22u25V
BSNL C449 C451
20
X5R 10n50V X7R
COG 1n50V
PVCC 19
C447
680n50V R449
PVCC 18
X7R 3R3
22VA
L404 6.8uH7.1A
AVCC 17
DGND DGND DGND
IC402
DIO7003LBST5
1 5
IN
OUT
3
FLG
2 4
GND ENB
R454
Q403
100K
NCE2305
R455
10K
R456
10K
Q404
2N3904
C460 R457
DGND
1nF 10K
DGND
H I
MGLB3216M161T5R0-LF
FB401
160R
D401
6.8V
R447
Note:
10K
Precaution for handling measuring instrument
Since the speaker output of this unit is BTL connected, the ground side
of the measuring instrument to be connected to the speaker terminal
MUST be kept in floating condition. MUST be kept in floating condition.
R402
100K
注意：
計測機器取り扱い上の注意
本機のスピーカー出力はBTL接続となっていますので、スピーカー端子
に接続する計測器のアース側はフローティング状態に保つ必要がありま
す。
+
L TWEETER
4 ohms
-
L+
+
8 ohms
-
C442
1n50V COG
L
DGND
C443
1n50V COG +
CN401
8 ohms
VH-4P
L+
-
4
L- L-
3 FULL-RANGE
R+ DRIVERS
R+
2 (FRONT L/R)
R-
1
+
8 ohms
C452
-
1n50V COG
DGND
R
C453
1n50V COG
+
8 ohms
R-
-
+
4 ohms
R TWEETER
-
FB402
600R
CN402
Page 44 D5
SMD_1.5mm_V
VDD
1
D-
to SUB (USB)_CN606
2
D+
3
GND1
4
CONNECTED WITH USB2.0 CABLE
5
DGND
★ Components having special characteristics are marked ⚠ and must be replaced
with parts having specifications equal to those originally installed.
★ Schematic diagram is subject to change without notice.
● ⚠印のある部品は、安全性確保部品を示しています。部品の交換が必要な場合、
パーツリストに記載されている部品を使用してください。
● 本回路図は標準回路図です。改良のため予告なく変更することがあります。
J