Fm - Audio (Af) - Philips VR120 Service Manual

Circuit diagrams and PWB layouts, Wiring diagram

7.10 FM - Audio (AF)

1 2
5VA 9VA
A
GNDAF GNDAF GNDAF
B
I666
16
GNDVS
GNDAF GNDVS
AH2
C AH1
AHC
2654 3658
17
470R
10n
GNDVS
11
I656
F668 2657
AFL
F667 2658
D 220n
AFR
I661 I657
2659
220n
AINFL
I660
2661
220n I664
AINFR
I654
2662
220n
AIN1L
2664
220n I653
AIN1R
I652
2665
220n
AIN2L
2666 I651
220n
AIN2R
E
220n
12
C652 C651 C650
GND GNDVS GNDAF GNDAIO
F663
F
AMLR
AMLP
1 2
VR120
3 4
F670
F669
GNDAF
9.1V 7.8V 3.8V
0.8V
27 34 29 28 41
DCL
1.2V 40 GND VCC Vref Iref
VCCH
DCR
active standby
passive standby
39
level
+
LPF
HID
35
detect
0V 4.3V
BPF HF
0V 4.3V 37
1,7/1,8 limiter
HFAGC
1.3Mhz
pb amp
0V 1.4Mhz
RM
HF
rec curr
4.2V
LPF level
36
+
M detect
38 BPF
4.2V
head amplifier 1,7/1,8 HF
I659
limiter
1
3.8V SAP HF
LPF
2
3.8V TUL
DUB
Volume L FM (de-)modulator
I655 N
3.8V 3
TUR
4
3.8V CIL
M
5
3.8V CIR
+ +
6
3.8V E1L
M
7
3.8V E1R
Volume R
3.8V 8 E2L
9
3.8V E2R
10
3.8V AUXL SAP
M
11 TUL
3.8V AUXR
+
Normal Sel
TUR
E2L
Input Sel
+
E2R
2670
220n
3 4
7. 73
5 6
I658
9010
GNDAF
4.0V
44 2V 0.5V 42 43 4.0V
7650
EOS+Pb
TDA9605H/N2
HIFI - AUDIO - IC
2
HiFi DET
I C
DOC
audio LPF
noise
PLL Noise
M
suppr.
Reduction
audio
CCO
clipper
audio LPF
Noise
CCO noise
Reduction
M
suppr.
1.7Mhz
1.8Mhz
audio
PLL
clipper
L
Line Sel
+
E2L
+
R
+
NILevel N
M
N E2R
i/o control
Out Sel Dec.Sel
M
EOS+REC
TUL
E1L
DUB
DCL SAP
TUR
DCR
E1R
SAP
MUTE Auto-mute
RFC Mute
4.6V 21 3.8V 22
6651
BAS216
18
GNDAF GNDAF
I665
19
5 6
Interconnections:
AF page 73 AL page 72
FV page 69 FOME page 78 I/O page 77
7 8 9
.. OSCILLOGRAMS
5VA 9VA
..V MEASURED IN PLAYBACK MODE
..V MEASURED IN RECORD MODE
5VA 9VA
2679
F652
23 10u
3.6V
F651 I662 2680
3655
24 3.9V
F664
2K7 2681
6n8
25 3.9V
F650 2650
47u
26 0.8V 0.7V
F656 2651
10u
33 3.9V 3.8V
F655
10u
32 3.9V 3.8V
3657 2653
31 3.9V
I663
0.7V 2K7
6n8
30
F653
2655
F654
2656
47u
10u
+1dB 12V
13
4.6V
2660
F657
16
2u2
15
2663
4.6V
17
F660
2u2
18
4.6V
14
F658 2667
19
2u2
M
4.6V
F659 2668
20
2u2
M
3.9V 15
F661 2669
13
M
100n
14
12
GNDAIO GNDAIO
GNDAF GNDAF
7 8 9
AIO1 page 66 AIO2 page 65 DE page 67 FM ST page 70 FM NIC-page 71
VPO page 76 VS page 75
PS page 64
1501 A1 F672 B5
2650 C9 F673 A1
2651 C9 F674 B1
2652 C2 I651 E2
2653 C9 I652 E2
2654 C1 I653 E2
2655 D9 I654 D2
2656 D9 I655 D2
2657 D2 I656 D2
2658 D1 I657 D2
A
2659 D2 I658 A5
2660 D9 I659 D2
2661 D1 I660 D1
2662 D2 I661 D1
2663 D8 I662 C9
2664 E1 I663 C9
2665 E2 I664 D2
2666 E1 I665 F5
2667 E9 I666 B2
2668 E8 I667 A4
2669 E8 I669 B6
2670 F4 I670 B6
B
2671 F7
2672 A4
2673 A2
2674 A2
GNDAF
2675 B1
2676 B2
2677 A4
GNDAF
2678 A5
2679 B9
GNDAF
2680 C9
GNDAF 2681 C9
C
2682 C2
GNDAF
3650 A4
3651 A6
3652 A6
GNDAF 3653 A5
3654 B8
3655 C9
GNDAF
3656 C8
GNDAF 3657 C9
3658 C2
3659 F7
3660 F9
D
3661 F9
5650 A2
AOUT1L 5651 B1
6651 F6
7650 B3
9010 A5
AOUT1R
C650 E2
C651 E1
C652 E1
F650 C8
AOUT2L
F651 C8
F652 B8
E
F653 C8
AOUT2R
F654 D8
F655 C8
F656 C8
F657 D8
AMCO F658 E8
F659 E8
F660 D8
F661 E8
F662 F7
F663 F2
F
F664 C8
F665 A5
F666 A4
F667 D1
F668 D1
F669 A3
F670 A3
F671 A4
AF 8920-1
VS_S page 74