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GRUNDIG Service
Chassisplatte – Verstärker / Chassis Board – Amplifier
1uF 6.3V
R842
0R
HP_Audio-L
HP_Audio-L
HP_Audio-R
HP_Audio-R
C885
3.3NF
220K
C886
3.3NF
R846
7
INL
TO V DD
OUTL
MAX9820
-1
SHDN
9
TO V SS
UVLO/SHUTDOWN
CLICK-AND-POP
SUPPRESSION
CONTROL
OUTR
V DD
-1
8
C1P
CHARGE
1
PUMP
TO V DD
C1N
2
V SS
INR
GND
10
3
6
31
I2S
R808100R
32
I2S_OUT_MCK
1
I2S_OUT_MCK
2
I2S_OUT_BCK
I2S_OUT_BCK
I2S_OUT_WS
3
I2S
I2S_OUT_WS
I2S_OUT_SD
4
I2S_OUT_SD
33
R810
SPKR-EN
SPKR-EN
1k
34
R811
4.7K
R814
NC
FAULT
FAULT
1
8
22
I2CA
2
7
3
6
I2C_A_SDA
I2C_A_SDA
I2C_A_SCL
4
5
I2CA
I2C_A_SCL
R817 100R
21
VCC3V3
R820
MUTE-AMP
MUTE-AMP
VCC3V3
1k
R827
4.7K
C849
100nF
Switch on (trigger: VCC_AUDIO)
0
VCC3V3
4.7UF C859
R828
100R
I2S_OUT_MCK
1
8
2
7
I2S_OUT_BCK
I2S_OUT_WS
3
6
4
5
I2S_OUT_SD
SPKR-EN
R832
10K
FAULT
R833
NC
RES_AU
1
8
2
7
I2C_A_SDA
I2C_A_SCL
3
6
C868
C869
4
5
R834
100R
22pF
22pF
Slave address:
AS Low: 0x38
AS High: 0x3A
¡
™
‹
›
10UF
10
39
GND
C882
PD
9
SHDN
C1N
C883
8
+Aud_Vcc
R843
VDD
VSS
1
8
7
INL
OUTL
2
7
6
INR
OUTR
3
6
IC804
4
5
MAX9820ETB+
1uF 6.3V
10K
R844
C884
R845
R847
220K
C804
100nF
VCC3V3
1uF 6.3V
C807
NC
4
C811
C815
NC
C877
5
100nF
25
GNDPSUB
26
CPP
R837
0R
27
VDD3V3CHP
28
VCC3V3
VDDDIG1
29
GNDDIG1
C820
30
FFX3B
100nF
31
FFX3A
32
EAPD/FFX4A
4.7UF C822
33
TWARNEXT/FFX4B
34
VREGFILT
35
AGNDPLL
8
36
MCLK
7
6
5
R812
NC
R813
100K
C831
C832
C833
C834
22pF
22pF
22pF
22pF
10
D802
BAT54CW
R818
RES_AU
NC
D804
1
MR_SOC
MR_SOC
R821
3
C843
33K
PD_LO
2
PD_LO
C845
100nF
VCC3V3
C846
1uF 6.3V
C848
NC
C851
NC
25
GNDPSUB
26
CPP
27
VDD3V3CHP
28
VDDDIG1
29
GNDDIG1
30
FFX3B
31
FFX3A
32
EAPD/FFX4A
33
TWARNEXT/FFX4B
34
VREGFILT
35
AGNDPLL
36
MCLK
C870
C871
22pF
22pF
R835
10K
VCC3V3
⁄
fi
C880
1
C1P
1uF
C881
2
40
1uF
3
4
L800
5
8
1
HPR
7
2
HPL
6
3
5
4
47K
47R
C800
C801
10nF
10nF
47K
R836
NC
C808
1uF 6.3V
IC800
STA381BWTR
C812
100nF
C818
12
GND_REG
100nF
11
VDD_REG
10
OUT1A
9
GND1
8
C821
VCC1
7
100nF
OUT1B
6
OUT2A
5
C823
VCC2
4
100nF
GND2
3
OUT2B
2
VSS
1
C825
VCC_REG
100nF
C830
100nF
VCC3V3
C840
C839
+5V2_ST
10uF
10uF
35V
35V
D803
R819
BAT54CW
470R
PD
PD
R822
R823
C844
10K
2.7K %1
4.7UF
R824
1
8
T800
2
7
R825
BC847B
3
6
1
1.2K %1
1
4
5
IC801
10K
AP432SRG-7
C847 1uF 6.3V
IC802
STA381BWTR
C850
C852
100nF
100nF
12
GND_REG
11
VDD_REG
10
OUT1A
9
GND1
8
C855
100nF
VCC1
7
OUT1B
6
100R
OUT2A
R826
5
C856
5
4
VCC2
4
6
3
GND2
100nF
3
7
2
OUT2B
2
8
1
VSS
1
VCC_REG
C863
100nF
TP11
C866
C867
C873
10uF 35V
10uF
C872
35V
10uF 35V
100nF
32
fl
2 - 23
S800
RIGHT
Right
TP1
LEFT
TP2
Left
GND
D800
D801
GND
CKX-3.5-12
TP3
C805
C806
R805
R806
100nF
100nF
8.2R
8.2R
C809
C810
100nF
100nF
NR 6045T 220M
TP4
C813
L801
C814
1nF
150pF
C816
C817
35
220nF
220nF
R807
50V
50V
100R
C819
1nF
L802
TP5
NR 6045T 220M
NR 6045T 220M
TP6
L803
C824
1nF
R809
C826
C827
35
100R
220nF
220nF
50V
50V
C828
C829
1nF
L804
150pF
NR 6045T 220M
TP7
C836
C835
TP8
100nF
100nF
C838
C841
C842
R815
R816
C837
L805
10uF
10uF
8.2R
8.2R
100nF
100nF
60R
35V
35V
3A
VCC_AUDIO
‡
°
37
C853
C854
L806
220nF 50V
220nF 50V
TP9
SUBW+
NR6045T220M
L807
SUBW-
NR6045T220M
TP10
C857
C858
100nF
100nF
C860
1nF 50V
C862
150pF
C864
C865
R829
R830
8.2R
8.2R
100nF
100nF
L808
VCC_AUDIO
60R 3A
2.1 Channel
MCLK
Audio Processor
FFX
TM
Modulator
STAudioFx
TM
LRCKI
STSpeakerSafe
TM
Parametric EQ
BICKI
Binary
Volume
Ternary
SDI
Bass and Treble
Speaker Compensation
Stereo Widening
LINEINL
STA381BW
LINEINR
TESTMODE
PWDN
Control logic
INTLINE
&
RESET
Protections
SA
SDA
IIC
PLL
SCL
·
‚
Chassis J5
36
S801
SP_RIGHT+
1
P1
2
SP_RIGHT-
P2
SP_LEFT-
3
P3
4
SP_LEFT+
P4
MOLEX_5025850470
TO Seaker
38
S802
3
P3
2
P2
1
P1
C861
1nF 50V
TO Woofer
OUT 1A
4
OUT 1B
Half
OUT 2A
Bridges
OUT 2B
FFX3A
FFX3B
FFX4A
FFX4B
F3XL
F3XR
LINEHPOUT_L
LINEHPOUT_R
Headphone
SOFT_MUTE
(2Vrms)
-3.3V
CPVSS
Negative
Charge
CPP
Pump
CPM
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