Grundig GV 27 Servicehandbuch Seite 38

1 2 3 4
A
..
OSCILLOGRAMS
... V MEASURED IN PLAYBACK MODE
... V MEASURED IN RECORD MODE
... chip components
B
C
5VA 12VA
5VA
12VA
D
95
2855 1,9V
FMAP
22n
96
25V
2856
1,6V
FMAR
E 22n
25V
91
2857 3,8V
AF1
2858 220n
25V 3,8V
AF2
220n 25V 2878 3,8V
AINFL
F
2879 Pos. 2878 & 2879 for cinchin only 220n 25V 3,8V
AINFR
220n 25V 2859 3,8V
AIN1L
2860 220n
25V 3,8V
AIN1R
220n 25V 2861 3,8V
AIN2L
2862 220n 25V 3,8V
AIN2R
G
220n
25V
Pos. 2861 & 2862 for 2scart only 97 98
H
FOR STEREO ONLY
I
AMLR
AMLP
1 2 3 4
2 3 4
SWIN
B
from DE/DC
92
FMPV
to VS,VS-S
93
3152
CSYNC
39k
from DE/DC
C
FMRV
from VS,VS-S
2153
22n
50V
16 15 14
CAGC REC TRIV CSYN
7150
REC IN
D
STV5742DT
2,5V 1,2V 2,4V
(HEADAMPLIFIER-VIDEO)
2,8V 4,4V 3V 2,1V
2
20 19 18
CAGC REC TRIV CSYN
REC IN
E
I_OUT I_OUT
SP
LP
7151
STV5744AD
F 6
VCC
REC
SP SP SP LP
V2 H2
I_OUT V1
1 2 3
Rec. SP 4V 0,2V
4V 4V
G Rec. LP 0V 0V 0V 0,2V
0V
0V 0V 0,6V
I_OUT V1 C1
V2
1 2 3
H
I
1
2
0V
2,9V
4V
0V
J
7020
MMUN2212LT1
9070
1
(SWITCH)
TRIV
4/0 2/0 2/0LP 2/2 4/2 3/0
3154 22k 1% 18k 1% 18k 1% 18k 1% 27k 1% 14k 1%
TRIV
K
to DE/DC
2 3 4
5 6 7
12VA 5VA
GNDAF GNDAF
2850 2852
100u 16V 100u 16V
2851 2853
22n 22n
GNDAF
25V 25V
2,8V
35 27 38 29 28 40 39
GNDD
DCL
supply & Vref
Iref
DCR
S&H
level
detect
BPF
HF
PLL
37
1,3/1,4 limiter
HF AGC
1.3Mhz
1.4Mhz
HF
CCO
LPF
36
M +
BPF
HF CCO
AFM
RFratio
+8dB 1,7/1,8 limiter
1.7Mhz
1.8Mhz
1 TUL
HF
PLL
LPF
2 TUR
Volume L
3 CIL
4 CIR
5 E1L
+
+
6 E1R
7 E2L
Volume R
8 E2R
13 E3L
14 E3R
44 SAP
Normal Sel
Input Sel
5 6 7
5 6 7
3151
9071
100k
SWIN
5VASW
7153
BFS20
(INVERTER)
6
11 10 9
13 12
GND2 YCPB VCC SWIN
SWR
5V 0,7V
2,1V 0,7V 0V 0V
17 16 15 14 13 12 11
GND2 YCPB VCC SWIN ENVC I_OUT
SWR LP
REC
SP/LP H1/H2
VCC
SP SP LP LP
LP
H2
GND1 H1 H1 V2
V1
4 5 6 7 8 9 10
0,2V
0,2V 0,2V 0V 0V
0,2V 0,2V 0,2V
4V 4V
0,6V 0,6V 0,6V 0V 0V
H2 GND1 H1 C2
4 5 6 7 8
3163
2158
10n
0E
50V
5
6
2
2157
10n
1
50V 1
5
7
4
TO ROTATING TRANSFORMER
5 6 7
8 9 10
DE/DC
GNDAF
3861
100
3860
GNDD
100
3,7V
2,1V 41 42 43
7850
TDA9604H/N1
(HIFI-AUDIO-PROCESSOR)
2
I C
Mute
DOC
DOC
audio LPF
S&H Noise
M
Reduction
audio
clipper
audio LPF
Noise
S&H Reduction
M
EOSel
audio
clipper
Line Sel
+
E2L
+
+
E2R
Dec.Sel
Out Sel
TUL
E1L
NILevel
TUR
E1R
RFC Mute
M
17 19 20 21
6V 3,8V
93 92
not used
GNDVS
8 9 10
9 10 11
5VASW
6
4,2V
4,2V
0V
0V
16 15 14
V1 IOUT GND2
PROT
7080
STV5712/TR
(HEADAMPLIFIER-AUDIO)
VCC V2 C2
1 2 3
1
4,2V 3,4V 0V
5VASW
0V 2,1V 0,6V
1
1
Reference AL ....................4-25
Oscillograms ....4-38 DC ...................4-35
AF....................4-29 DE ...................4-33
9 10 11
11 12 13
Record
Left Channel
Right Channel
2864
0V
22
25V
3851
220n
23 3,8V
3852
3,8V
47k
24
2866
3k9
25 3,8V
2867
47u 16V
3,8V
26
2868 GNDAF
34 3,8V
10u 16V
3853
220n
25V
33 3,9V
3854
47k
32 3,8V
0,8V 2870 3k9
31
3,8V 47u 16V 2871
30
DCL
GNDAF
10u 16V
2872
DCR
99
10u
16V
6V
9
2873
10u
16V
6V
10
89
GNDAF GNDAF
6V
2876
15
10u
16V
6V
2877
16
10u
16V
+1dB 12V
3,8V
11
0V
GNDAF GNDAF
12
for 2-SCART STEREO only
90
18
2874
2832
10u
16V
100n
25V
GNDAF
GNDAF GNDAF
11 12 13
12 13 14 15
5VASW
Record (Luminance / Chrominance)
Playback (Luminance / Chrominance)
Record (Left/Right Channel)
Playback (Left/Right Channel)
1k1
1
2 1k2
3080 3081 3085
5E6 560E
7085
BC847B
3083
0,2V 0,2V 5,2V
4k7
0V 0V 0V 0V 5,2V
13 12 11 10 9
PROT VMES VIN SW- SW-H
REC
SW LOGIC
H2 GND1 H1 C1 FMOUT
4 5 6 7 8
0V 3,4V 4,1V
0,6V 2,1V 2,5V
3082
100E
for STEREO only
...
1 2 3 4 5 6 7
OSCILLOGRAMS
HA 2/0 X X X
...V MEASURED IN PLAYBACK MODE
HA 2/2 X X
HA 3/0 X X X
...V MEASURED IN RECORD MODE
HA 4/0 X X X
... chip components
HA 4/2 X X X
FV....................4-21 IO.....................4-27 QMB ................4-15
FM ...................4-24 OS ...................4-24 QNIC ...............4-36
HA ...................4-30 PS....................4-31 VP....................4-24
12 13 14 15
14
2811 B 7
2829 B 8
2832 I11
A
2850 B 5
Playback 2851 B 5
2852 B 6
Left Channel 2853 B 6
2854 B 6
Right Channel
2855 D 3
2856 E 3
2857 F 3
2858 F 2
2859 F 3
B
2860 G 2
2861 G 3
2862 G 2
2863 I 8
2864 D12
2865 D14
2866 D12
2867 D13
2868 E12
2869 E14
C
2870 E12
2871 F13
2872 F13
2873 F13
2874 I13
2875 I12
2876 G13
2877 H13
2878 F 4
2879 F 2
D
3828 B 7
2865
3829 B 8
3850 B 6
4n7
3851 D13
GNDAF
25V
3852 D13
3853 E13
3854 E13
3855 G13
3856 G13
3857 I12
E
3860 B 9
2869
3861 B 9
3862 H14
4n7
3863 H13
GNDAF
25V
7850 C10
AOUT1L
F
AOUT1R
G
AOUT2L
AOUT2R
H
AMCO
to FV
I
AF(40393)
14
16
1915 K 5
1916 J 5
2080 D13
2081 H11
B
2082 H12
2083 H13
5VASW 2084 H13
2085 H11
from PS
2086 H10
2087 E10
ENVC 2089 H15
2150 J 1
to DE/DC
2151 C 5
2152 C 5
C
2153 C 3
2154 J 3
2155 I 9
2156 I 4
FMAR 2157 I 5
2158 H 7
from AF
2159 H 6
2160 H 5
2161 H 6
2163 C 4
D
3087
3051 I 2
IRAF 3080 C12
100k
3081 C13
from DE/DC
3082 G15
HP2 3083 D15
3084 D14
from DE/DC
3085 C15
3086 E10
3087 D16
3151 B 6
E
3152 C 3
3153 I 1
3154 K 2
3156 J 3
3157 I 9
3158 B 9
3162 G 9
3163 H 7
3164 I 6
3165 I 6
F
5080 H10
5150 C 6
7020 J 3
7080 F11
7085 D15
7150 D 2
7151 F 3
7153 C 9
9070 J 1
9071 B 7
G
FMAP
to AF
H
I
J
VS....................4-25
VS-S ................4-28
K
HA(40393)
16