Download Chassis 14.2

GRUNDIG Service
Chassis 14.2
DC-Spannungen / DC Voltages
IC101 (TDA956x / OM836x)
Pin
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
Description
Volume +/–
Status 1
Status 2
Digital ground for u-controller
nc.
Standby oon/off
Analog GND of text decoder and
digital GND of TV processor
SECAM PLL decoupling
2nd supply voltage TV processor (8V)
Supply voltage decoupling of digital GND
of TV processor
Phase 2 filter
Phase 1 filter
GND 3 for TV processor
Decoupling bandgap
AVL (90 versions) /
East/West drive signal (110° versions)
V-drive B output
V-drive A output
IF-1 input
IF-2 input
Reference current input
Vertical sawtooth capacitor
Tuner AGC output
Sound IF input 1
GND
GND
Norrow band PLL filter
AVL (Automatic volume levelling)
Extern Audio (audio 2) input
Audio 3 input
H-drive output
Sandcastle output / horizontal fly input
Decoupling sound demodulator
QSS intercarrier output / AM output
EHT / overvoltage protection input
IF-PLL loop filter
Sound IF AGC
QSS output
IF video / selected CVBS output
Main supply voltage TV processor
Internal CVBS input
GND for TV processor
External CVBS input
GND for TV processor
SVHS-Y input
SVHS-C input
White stretch capacitor
CVBS output
Audio output / AM audio output
2nd IF video output
2nd RGB / YUV insertion input
Red input
Green input
Blue input
Beam current limiter input
Black current input / V-guaard input
Red output
Green output
Blue output
Analog supply of text decoder /
digital supply of TV processor
OTP programming voltage
Digital supply to core (3.3V)
X-tal GND
X-tal input
X-tal output
Programming reset
Digital supply to periphery (3.3V)
SCL1 (EEPROM)
SDA1 (EEPROM)
IR input
nc
SCL
SDA
MSP reset (IC301)
Mute
SVHS switching
L/L' switching
F blank MM
Program +
CVBS sync filter
Program -
IC301 (MSP34xx)
Level
3.2V (3.2V)
0V (0V)
0V (0V)
0V (0V)
0.75V (0.2V)
0V (3.9V)
Pin
1
2
3
4
5
6
0V (0V)
7
2.3V (0V)
8.0V (0.3V)
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
5.0V (0V)
2.7V (0V)
3.9V (0V)
0V (0V)
4.0V (0V)
3.0V (0.5V)
1.0V (0V)
1.0V (0V)
1.8V (0V)
1.8V (0V)
3.9V (0V)
3.8V (0V)
4.3 (0V)
1.9V (0V)
0V (0V)
0V (0V)
2.2V (0V)
0.4V (0V)
3.7V (0V)
3.7V (0V)
2.3V (0.3V)
0.6V (0.2V)
2.0V (0V)
3.4V (0.3V)
2.2V (0V)
2.4V (0V)
0.5V (0V)
0.6V (0V)
3.0V (0V)
8.0V (0.2V)
3.8V (0V)
0V (0V)
0V (0V)
0V (0V)
3.3V (0V)
0V (0V)
3.4V (0V)
2.8V (0V)
3.5V (0V)
0.2V (0V)
0.2V (0V)
2.6V (0V)
2.6V (0V)
2.6V (0V)
2.6V…3.4V (0V)
4.6V…5.7V (0V)
see oscillogr. 9
see oscillogr. 10
see oscillogr. 11
3.3V (3.3V)
0V (0V)
3.3V (3.3V)
0V (0V)
–
–
0V (0V)
3.3V (3.3V)
3.3V (3.3V)
3.3V (3.3V)
3.3V (3.3V)
–
see oscillogr. 37
see oscillogr. 38
4.9V (0V)
0V (3.3V)
3.3V (3.3V)
3.3V (3.3V)
3.3V (3.3V)
3.3V (3.3V)
3.3V (1.8V)
3.3V (3.3V)
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
IC303, IC304 (TDA7263)
Description
nc
GND
GND
Digital control input/output
Digital control input/output
GND
Standby (in normal operation it must be
high)
nc
SCL
SDA
nc
nc
nc
nc
nc
nc
ADR bus clock output
Digital circuit supply voltage
Digital circuit supply ground
nc
nc
nc
nc (Ground)
MSP RESET input
Headphone sound output (R)
Headphone sound output (L)
Reference analog ground
Speaker output (R)
Speaker output (L)
nc
nc
nc
Scart 2 sound output (R)
Scart 2 sound output (L)
Reference analog ground
Scart 1 sound output (R)
Scart 1 sound output (L)
Volume capacitor headphone
Analog supply high voltage (8V)
Volume capacitor speaker
Ground for analog power supply high
voltage
Internal analog reference voltage
Scart 4 input (L)
Scart 4 input (R)
Analog shield ground
CINCH - sound input (L)
CINCH - sound input (R)
Analog shield ground
Scart 2 sound input (L)
Scart 2 sound input (R)
Analog shield ground
Scart sound 1 input (R)
Scart 1 sound input (L)
A/D converter reference Voltage
Mono sound input
Ground for analog power supply voltage
Analog power supply voltage (5V)
IF input 1
IF common reference for IF IN1/IN2
IF input 2
Factory test mode enable (ground)
Crystal osscillator input
Crystal osscillator output
nc (Ground)
Level
–
0V
0V
0V
0V
0V
4.9V
4.9V
see oscillogr. 37
see oscillogr. 38
2.4V
2.4V
2.4V
4.9V
0.7V
0.7V
0.7V
4.9V
0V
0.7V
0V
0V
0V
4.9V
2.1V
2.1V
0V
0V…2.1V
0V…2.1V
0V…2.1V
0V…2.1V
0V
3.7V
3.7V
0V
3.7V
3.7V
–
8.0V
–
0V
3.7V
3.7V
3.7V
0V
3.7V
3.7V
0V
3.7V
3.7V
0V
3.7V
3.7V
2.5V
3.7V
0V
4.9V
1.5V
1.5V
0V
0V
2.3V
2.3V
0V
Pin
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
Description
Left in
Left in V
Mute
Right in V
Right in
GND
nc
Right out
VSS
Left out
nc
Left in
Mute
Right in
nc
VSS
nc
Level
1.6V
1.6V
15.3V
1.6V
1.6V
0V
–
14.2V
28.0V
13.9V
–
1.6V
15.3V
1.6V
–
28.0V
–
IC501 (TDA835x)
Pin
1
2
3
4
5
6
7
8
9
Description
Input A
Input B
Supply voltage
Output B
GND
Vertical flyback supply voltage
Output A
Guard output
Feedback input
Level
1.0V (0V)
0.9V (0V)
14.7V (0V)
7.6V (0.4V)
0V (0V)
45.6V (10.9V)
7.6V (0V)
0.3V (0V)
7.9V (0V)
IC601 (MC44608)
Pin
1
2
3
4
5
6
7
8
Description
Demag
I sense
Control input
GND
Driver
VCC
nc
VI
Level
0.9V (0.0V)
01V (0.3V)
5V (5.5V)
0V (0V)
2.1V (0.1V)
12.3V (8.8V)
–
117V (117V)
IC701 (TDA6107)
Pin
1
2
3
4
5
6
7
8
9
Description
Red in
Green in
Blue in
GND
Black current output
VDD supply
Red out
Green out
Blue out
Level
2.3V…2.5V
2.5V…2.7V
2.5V…2.7V
0V
4.5V…5.5V
190V
134V…137V
128V…130V
130V…137V
( * ) standby mode
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