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GRUNDIG Service
IC-Blockschaltpläne / IC Block Circuit Diagrams
28
27
26
25
24
23
22
10K
PerGND
7.5K
Stand
-by
20K
x2
7.5K
Thermal
Det. Amp.
Shut down
Det. Amp.
x2
7.5K
20K
7.5K
10K
10K
1
2
3
4
5
6
7
21
20
19
18
17
16
15
PGND
PVcc2
15K
10K
Loading
Actuator
Driver
Driver
PVcc1
PVcc2
BA5954
Vcc
Sled
Actuator
Driver
Driver
25K
PVcc1
PGND
Vcc
8
9
11
12
10
13
14
RS
SHDN
V
DD
V
PB0
SS
Control
Wiper
Logic
Register
PA0
PW0
Resistor
Array 0
PB1
CS
Wiper
Resistor
16-Bit
PA1
Register
Array 1*
SI
Shift
PW1
Register
MCP42100
SCK
S0
C
T
5.5µA
V
–
ON
Q3
Q4
+
V
REF
O2
LT1947
FB2
OSC
1.26V REFERENCE
3MHz
AND
SLOPE 1
OSCILLATOR
UNDERVOLTAGE
SLOPE 2
LOCKOUT
BCK
Audio
LRCK
Serial
4x/8x
DATA
Port
Oversampling
Digital Filter
with
Function
Serial
ML
Controller
MC
Control
MD
Port
System Clock
System Clock
SCK
Manager
2 - 20
DVD-P 7000
V
SHDN
IN
5
4
LT1615
R5
R6
40k
40k
A1
+
ENABLE
–
400ns
FB
Q1
Q2
ONE-SHOT
3
X10
DRIVER
RESET
R3
+
30k
R4
–
140k
A2
V
FB1
GND
IN
V
IN
28mV
OSC
–
+ –
–
–
S
+
R
Q
+
REF
+
REF
+
∑
+
SLOPE 1
OSC
–
–
S
+
R
Q
+
REF
REF
+
∑
+
SLOPE 2
Output Amp and
DAC
Enhanced
Low-Pass Filter
Multilevel
Delta-Sigma
Modulator
Output Amp and
DAC
Low-Pass Filter
PCM1742
Power Supply
Zero Detect
SW
1
Q3
0.12Ω
GND
42mV*
2
SHDN
SHUTDOWN
SW1
Q1
0.01Ω
SW2
Q2
0.03Ω
1947BD
V
L
OUT
V
COM
V
R
OUT
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