Verstärker - Grundig davio GBF6300 Service Manual

Hauptplatte – Verstärker/ Main Board – Amplifier
SC_AI
GND
SC_RI
GND
S107 1
RCA1P
WHITE
S108
GND GND
RCA1P
RED 1
GND
S109
Right RIGHT
LEFT
Left
GND
GND
PC Audio
GND
GND
MONO_AUD
AUDIO
C171
R171
10K
C172 2.2uF
R172 R173
22pF
18K 0R
GND C175
R176
IC108
74HC4052 SO16
10K
(2.2uF) 12
R177 X0
C177
14
(18K)
22pF X1
15
X2
11
X3
GND C180 1
R179 Y0
5
Y1
2
10K Y2
2.2uF 4
R180 R181 Y3
C182
18K 0R
22pF
10
A
9
B
GND C184
R182
10K
(2.2uF)
R183
C185
(18K)
22pF
R186 R187
10K 10K
GND
C186
R189
10K
2.2uF
R191 R192
C188
18K 0R
22pF
GND C189
R193
10K
(2.2uF)
R194
C190
(18K)
22pF
GND
R195
1K
R196 R197
33k 1K
R198
C191
10k
22pF
GND GND
L117
VCC2.5V 12V_SW
FB1206
C173 C174
R174 220u/16 100n
R175
47K
47K
13 C176 1u
X R178
3 1K
Y
C178 1u
C179
C181
560pF
560pF
GND GND
16
VDD +5V
7
VEE
6
EN
C183
0.1uF
+5V
GND
+5V
R185
R184
15K
1K
R188
VOL/MUTE
1K2
SW_B
SW_A
R190
VOL/MUTE< 0.3V - Mute C187
10K
VOL/MUTE> 0.3V - Volume
(VOL/MUTE -PWM ) 1u
5
positive input
7
DC volume control
IC107
TDA7056AT (FAN7040)
1 20
L128 120R/100MHz
NC NC
2 19
NC NC
3 18
NC NC
4 17 L+(M)
L123 120R/100MHz
VCC OUT-
5 16 L-(M) L124 120R/100MHz
IN NC
6 15 120R/100MHz
SGND PGND
7 14 L125
VC OUT+
L126
8 13
NC NC
120R/100MHz
9 12
NC NC
10 11
NC NC
GND GND
IC109
TDA7056AT (FAN7040)
1 20
NC NC
2 19
NC NC
3 18
NC NC
4 17 R+
VCC OUT-
5 16
IN NC
6 15
SGND PGND
7 14 R-
VC OUT+
8 13
NC NC
9 12
NC NC
10 11
NC NC
GND GND
V P
n.c.
1 to 3, 8 to 13, 4
16, 18 to 20
+
TDA7056AT
I + i 14
positive output
+
−
I − i 17 −
negative output
+
TEMPERATURE
V ref PROTECTION
STABILIZER
6 15
MGM576
signal power
ground ground
S106
L+
1
L-
2 6
R-
3
R+
4
MOLCON4
L127
120R/100MHz
6