Chassis Board – Amplifier - Grundig 22 XLE 3220 BA Service Manual

Chassisplatte – Verstärker / Chassis Board – Amplifier
7
2.1 Channel
MCLK Audio Processor
STAudioFx TM
LRCKI STSpeakerSafe TM
Parametric EQ
BICKI
Volume
SDI Bass and Treble
Speaker Compensation
Stereo Widening
8
LINEINL
STA381BW
LINEINR
TESTMODE
PWDN
Control logic
INTLINE
&
RESET
Protections
SA
SDA IIC
SCL
PLL
(
19
AUMCKO
20
AUSCK
AUWS
21
AUSD0
AU_MUTE
22
AU_MUTE: HI-ON; LOW-STBY
)
VCC3.3V
FAULT
8
MI2C-SDA
MI2C-SCL
7
¡
Power on (trigger: +5V2_STBY)
™ 4
PD
PD
£
OUT 1A
4
OUT 1B
Half
OUT 2A
Bridges
C402 1uF R403 10K
FFX TM OUT 2B HP_RIGHT
Modulator 23
FFX3A
HP_LEFT
FFX3B
Binary
FFX4A
Ternary
C403 1uF R406
FFX4B
F3XL
F3XR
LINEHPOUT_L
LINEHPOUT_R
Headphone
SOFT_MUTE
(2Vrms)
CPVSS
-3.3V
Negative GND
Charge
C448
Pump
CPP
R428 0R
CPM
VCC3.3V
100nF
C413
GND
C422 1uF
GND
GND
R411 4*100R
R412 1k
R413
C430 C431 C432 C433
100K
22pF 22pF 22pF 22pF
R414 NC/10K
R415 NC
R416 1k GND
R417
4*100R
GND GND
R420 10k AMP_RST
4 VCC3.3V
AUDIO_RST R422 1k
C444
100nF
GND
External HP Amplifier option.
C441
+Aud_Vcc
1uF
IC402
MAX9728A
C446 C447
1uF 1uF
≤
4 12
PVss Vdd
5 11
/PD OutL
R400 4*47R
6 10
InL OutR
10K
GND VCC3.3V GND
R427
7 5 3 1
C405 C406 4*0R
1uF
100nF
C404
1uF C409 1uF
8 6 4 2
GND
IC400
STA381BW
C412
1uF
49
E_PAD
25 12
GND GNDPSUB GND_REG
26 11
CPP VDD_REG
27 10
VDD3V3CHP OUT1A
28 9
VDDDIG1 GND1
29 8
GND GNDDIG1 VCC1
30 7
FFX3B OUT1B
31 6
FFX3A OUT2A
32 5
EAPD/FFX4A VCC2
33 4
TWARNEXT/FFX4B GND2
34 3
VREGFILT OUT2B
35 2
AGNDPLL VSS
36 1
MCLK VCC_REG
GND
C434
GND 100nF
VCC3.3V GND
C437
10uF 35V
+5V2_STBY
R421
D402
330R %1
D403
BAT54CW
BAT54CW
GND C445 R423 R424
R425 4.7uF 10K 1.2k %1
4*10k
T400 1 R426
BC847B 2K 1%
IC401
GND AP432SRG-7
24
S400
TP124
HPR RIGHT
Right
HPL TP125 LEFT
Left
GND
GND
TP126
Headphone
R401 R402
C400
C401 22nF
1k 1k
GND
22nF
GND GND D400
PESD5V0S1BL
GND GND
D401
GND GND
PESD5V0S1BL
GND
C407 R407
R408
100nF 8.2R 8.2R
GND
C410
100nF
L401 22UH M 1.9A
C414
L402 22UH M 1.9A
100nF
C416
150pF
C418
25
R409
2 4 6 8
C415 100nF
4*100R
220nF
L403 22UH M 1.9A
C420 100nF
1 3 5 7
GND
L404 22UH M 1.9A
GND
L405 22UH M 1.9A
C423 100nF
L406 22UH M 1.9A
2 4 6 8 R410
4*100R
C425
C426
25
100nF
1 3 5 7
220nF
C428 L407 22UH M 1.9A
150pF
L408 22UH M 1.9A
C435
C439 C440
100nF
C438
10uF 35V 10uF 35V
10uF 35V / NC / NC
C442
TP132
R418
R419
100nF
8.2R
GND GND GND GND
GND
+12V +24V
∞
12 5 6
(2) (8) (9)
V DD INL MAX9728A
SHDN
V DD
ON
11
OUTL
OFF (1)
SV SS
C1P
1
CLICK-AND-POP
(3)
SUPPRESSION
V DD
10
OUTR
C1N
3 (14)
(5) SGND
SV SS
PV SS SV SS
PGND SGND INR
4 2 7 8 9
(7) (4) (10) (11) (12)
C408
100nF
C411
100nF
TP127
C417
1nF
C419
220nF
GND
GND
C421
1nF
TP129
1
SP_RIGHT+
26
P1
2
SP_RIGHT-
P2
TP130 SP_LEFT- 3
P3
SP_LEFT+ 4
P4
C424
1nF
S401
C427
SPEAKER GND
220nF
MOLEX_5025850470
GND
C429
1nF
TP131
C436
100nF
C443
100nF
8.2R
§