Audio Amplifier - Grundig Toronto 26-7831 T Service Manual

Audio-Verstärker / Audio Amplifier
R811
AU_SW_L
AU_DACO_L
470R
R813
C824
47K
3n3
Audio-ON/OFF
MUTE_S
R840
R816
* R841
AU_SW_R
AU_DACO_R
*
470R
C826
R819
3n3
47K
+5V_ST
1 5 R842
AU_OP_L
VCC
2
AU_SW_L
4.7k
3 4
GND
IC806
74LVC1G66GW
C844
1u
1 5
AU_OP_R
VCC Y 1
2
AU_SW_R
3 4 GND
Z
2
GND
3
GND
IC805
74LVC1G66GW
C840
R825 R826
AU_DACO_HL
470R
4K7
1u
C842
3n3
GND GND
C833
R815 R818
AU_DACO_HR
4K7
470R
1u
C836
3n3
GND
V O U T 1 V D D
1 8
V IN 1
2 R822
-
VCC5V
V R E F
+
10K
3
R823
PT2308
V R E F 5 10K
+
V IN 2
-
7 4
6
G N D GND
V O U T 2 GND
Vorabversion
Preliminary Version
2.2K
R847
L800
P24V
120R/100MHz
D800
VCC3.3V-ST
30V 3A
R803
R805
10K
10K
R806
Audio-ON/OFF
100R
MUTE_S
R853
POP
(2.2K)
PCB Index R-4
AU_OP_L C813
2u2
AU_OP_R C814 C803
2u2
1u/6.3V
R830
*
R834
R843
*
100R
T800
R833
74LVC1G66GW
BC847B
22K
5 V CC
R832
E
4 4.7k
IC803
ZTL431AFFTA
GND
C841
2n2 IC802
PT2308
1 8
OUTA VDD
R814
22K
C832
1n5
2 7
INA(NEG) OUTB
C835 C536
1n5
2n2
3 6
GND INA(POS) INB(NEG)
4 5
VSS INB(POS)
C839
100n
GND
P24V_AMP
C817
1u
C800
IC800
C843
TPA3121D2
NC
1 24
PVCCL PGNDL
2 23
#SD PGNDL
3 22
PVCCL LOUT
4 21
MUTE BSL
5 20
LIN AVCC
6 19
RIN AVCC
7 18
BYPASS GAIN0
8 17
AGND GAIN1
9 16
AGND BSR
10 15
PVCCR ROUT
11 14
VCLAMP PGNDR
12 13
PVCCR PGNDR
C807
C802
1u/25V
1u
R837
+12V
GAIN0
*
330R %1
R839
+5V_ST
GAIN1
R838
P24V
R835
1.2k %1 *
R844
P24V
22K
R836
2
2K 1%
L803
C827
HPR
300R/100MHz
100u/16V C830 C831
1n 220p RIGHT
GND GND
L804
C834
HPL
GND
300R/100MHz
R521 100u/16V C838
22K C837 220p
1n
GND GND
R810
VCC5V
0R
C845
C820
100u/16V 1u
GND
P24V_AMP
15 % ^
C808
L801
SP_LEFT
33uH
470u/35V
C811
C806
220n
470n
GAIN0
GAIN1
C805
220n
C809
L802
C801 C846 SP_RIGHT
33u
1u
470u/35V
15 C810
100u/35V
470n
VCC3.3V-ST
GAIN1
R801
10K
GAIN2
R800
10K
AMP-Gain 20dB
R804
NC
R802
NC
TPA3124D2
AVCC AVDD
REGULATOR
AVDD
LIN
AVDD/2
AGND
CONTROL
S500 SD
BIAS
Right
THERMAL
MUTE
LEFT
MUTE
Left CONTROL
GND
GND
BYPASS BYPASS
Headphone
OSC/RAMP
GAIN1
AV
CONTROL
GAIN0
AVDD
RIN
16
S800
1
2
TO SPEAKER
3
4
SPEAKER
16
L H L H
L L H H
26dB 30dB 36dB
BSL
PVCCL
HS
+ LOUT
VCLAMP
–
LS
AVDD
PGNDL
SC
DETECT
VCLAMP
SC
DETECT
BSR
PVCCR
HS
ROUT
–
VCLAMP
+
LS
PGNDR
AVDD
AVDD/2