Loewe Credo 7681 ZPW Instrucciones De Servicio página 130

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1
2
Z
Stereoendstufe
Final stage stereo
R478
Y
22k
C473
UNF+
100n
C472
R473
X
C471
22µ
680R
R479
13
2
220R
22µ
7
10
L479
6
4
3µ8
I474
TDA7296
14
C474
W
C478
1
W470
2n2
W471
2n2
B474
9
gn
1
8
3
15
2
2
3
1
C477
V
4
UNF-
C479
100n
10µ
5
R488
6
22k
7
2
8
1
U
C483
C489
9
U12
UNF+
10µ
W481
100n
B473
ge
C481
R489
R483
2
13
220R
10
680R
22µ
7
T
6
4
L489
I484
TDA7296
3µ8
14
C488
1
C484
2n2
9
2n2
8
3
S
15
C487
UNF-
100n
R
D680
100V
C669
R669
UB
3k3
100n
R680
C670
Q
47k
22n
R670
100k
D672
P
R693
U7
120R
D669
C3V9
R665
56k
1N4148
D670
O
30V
R651
18k
N
I669
Netzteil
PS2561-1L-V
M
Power supply
R621
R618
L
56k
Br.
2W
6
MP4
C623
R627
7
8
R629
22R
R623
220n
10k
K
4k7
R635
3
Br.
I611
R636
R622
TDA4605-3
1k
D636
820k
R633
C622
J
BA157
2k2
100µ
1
C632
C634
C631
C636
R625
220n
R632
4n7
680k
82R
4n7
2
4
I
R634
680k
MP1
Q624
5
R630
MP3
BUZ91A
D630
22R
L626
C637
MP2
Typ-Var.
4n7
R628
BrÅcke
R624
Typ-Var.
H
C626
C628
3W
Typ-Var.
22R
G
L619
L618
D623
Typ-Var.
Typ-Var.
Typ-Var.
B622
an Bedienteil
F
B613
C620
to Control unit
330µ
B611
R613
D617
Typ-Var.
F611
1R5
B620
T612
T3.15A
E
2x18M5
B609
W611
T618
C612
C613
Typ-Var.
1
Typ-Var.
Typ-Var.
2
D613
D
B250C3200
B612
Netz in
C611
Typ-Var.
C614
R619
330p
PTC
C
W619
W618
C619
1
1
100n
2
2
B
Entmag.
Entmag.
an Entmagnetisierung
Netzspannungs-Potential
to Degaussing
Supply voltage potential
A
1
2
3
4
5
an,to Signal Board W1311
1
2
3
4
5
6
7
8
9
10
11
12
13
W610
U5
U3.3
U12
MP28
B227 B224
B228
B223
R474
R472
22k
22k
C476
R471
22k
D474
UNF+
UNF+
W651
ws
R477
R466
C466
1N4148
10k
2200µ
470R
F655
1
3W
Br.
R476
2
U25
33k
3
R468
C468
470R
2200µ
U14
C482
3W
F654
an,to W201 SAT
UNF-
UNF-
Br.
22µ
C467
R467
2n2
6k8
R484
R482
22k
22k
C486
C492
4µ7
UB
R492
C678
P662
1k
1k
2n2
R662
R663
4k7
220k
R659
R647
UB
Br.
Typ-Var.
D666
SD103
B663
I670
E3
TL431
R672
UB
1k
D491
1N4148
B549
R491
W701
3R3
rt
D652
L650
T639
BYT08
R691
R692
I691
22
100R
100R
L78S09
UB
C650
C651
1
3
IN
OUT
150p
47u
D622
GND
6
C691
C692
C693
BA157
100µ
330n
330n
20
R690
D656
R626
1R
BYW98
L656
22R
19
U25
F656
C656
C657
I663
F3.15A
680p
470µ
R653
R654
L7808
100R
100R
1
3
C661
IN
OUT
5
GND
680p
U14
C621
C660
C666
18
470n
D661
100µ
330n
L661
BYW98
17
C663
F661
330n
C664
T3.15A L
C662
U25
R666
22n
18k
470µ
R676
C665
Q663
Typ-Var.
330n
C627
BUZ71A
R674
D671
470p
8
1k
STPS20L40CF
R668
F672
U7
3
T5A
C673
I674
4k7
330n
15
1
2
TL431AC
C674
C682
C672
R664
680p
22n
4700µ
1k
16
R677
R675
Q674
10k
C677
1k
BUZ71
D681
1%
220µ
10
14
F689
BA157
C681
I676
D686
R678
R679
T630mA
220µ
BYW98
TL431AC
10k
100k
13
UNF+
1%
L685
R686
L686
0R1
D687
R687
R685
R681
BYW98
0R1
68R
3R3
2W
Q682
BD536
12
C688
Q562
W-TRAFO
680p
C687
R683
R682
BUZ71
470µ
470R
33R
L687
C639
UNF-
2n2/4kV
C689
R684
220n
6k8
Q681
R639
BC557B
10M
Geräte-Potential (erdfrei)
Set potential (off ground)
3
4
5
6
7
an,to Signal Board W1731
W511
1
2
3
4
5
6
7
8
9
10
11
12
13
Hyperband-Tuner
Hyperband tuner
U8
R207
R206
UB
MP25
MP24
MP23
MP22
MP21
18k
18k
MP26
U33
MP27
B497
L203
U5
47µ
L202
U9
47µ
C201
47µ
U202
Tuner
U203
Tuner-PIP
Hor. Endstufe
R657
U25
W532
Hor. final stage
Kont
4k7
Hor.
1
R658
2
L530
4k7
L521
22m
D532
22µ
BYW98
B532
R521
MP11
3R3
MP10
C521
T528
R532
L532
Br.
0R68
100µ
R533
C524
Q534
12R
2SC4542
Q532
ZTX614
R529
R530 R525
Tr
R526
4k7
4k7
4k7
56R
R527
R524
4k7
C526
4k7
100p
D527
C527
EU02
MP9
220n
L539
L541
C531
C528
Typ-Var.
U9
680p
Q526
D526
2SC3944
C541
C694
1N4148
Typ-Var.
100µ
R535
C543
L543
100k
Typ-Var.
D539
Q533
ESC011
BF422
L588
R587
L536
U12
C555
22µ
4k7
Typ-Var.
100n
U8
Q582
Q589
R588
C588
L542
BC556B
BC557B
C667
10k
10µ
100µ
Typ-Var.
R540
R589
U12
L590
47R
C589
3k3
C542
1m6
C668
100n
C582
Typ-Var.
220µ
L538
Lin
Q593
100p
D584
BC557B
R590
C30V0
10R
D590
R583
BA157
R581
C658
390k
R543
10k
R593
1k5
10R
R582
R584
R592
D589
4µ7
10k
33k
1R
BA157
R585
150R
U5
MP8
C581
R586
R591
4n7
O/W-Korrektur
C676
1k
1R
330n
Q586
C590
BD537
R580
Typ-Var.
E/W-correction
100R
VPROT
C552
V-
330n
V+
C563
R566
R563
82k
C567
R565
R578
220µ
R562
470R
VFLB
1n5
40k2
82k
10K
D561
D568
U3.3
BA157
Br.
MP5
MP7
MP6
C659
220µ
R568
R561
1R5
3K9
2
UV+
1%
FLYBACK
GENERATOR
C562
C568
I569
220n
470n
TL431AC
R560
4
I561
UV-
UV-
10K
TDA8177
C569
C578
220n
1n5
R579
40k2
C577
Typ-Var.
Vert.-Ablenkung
Vert. deflection
6
7
8
9
10
an,to Signal Board W1003
1
2
3
4
5
6
7
8
9
10
11
12
13
W211
W250
U9
B216
bl
D206
8
C30V0
7
6
C206
5
10µ
4
B215
3
U12
2
1
C203
MP20
MP19
MP18
MP17
MP16
MP15
100µ
an,to W181 SAT
W260
grn
MP14
4
3
2
1
SAT
R545
B536
B537
Typ-Var.
T531
12
(9)
R518
10R
32KV
C532
L531
100p
R531
R517
D531
3R3
22R
RU2
R516
C511
FOCUS
R551
Q531
D533
22µ
22R
150k
ZTX712
BA157
5
(5)
R534
C534
C533
3R3
MP12
UG2
R550
100µ
R552
2k2
R536
W550
1M
10k
100p
C549
1
ws
R542
(12)
C535
1k8
5
R537
22n
MP13
100µ
(13)
13
UF
4
D541
D548
D549
10k
7
10
3
(2)
(8)
2
R541
BA157
1N4148
C30V0
R548
3R3
1
120R
D547
USVM
R538
C537
BA159
L547
100k
4
100p
an,to
C538
(4)
R547
W301 CRT-PCB
3R3
C547
47µ
L534
L553
150µ
R549
100p
C548
8
150k
22µ
(6)
Typ-Var.
R555
UB
D558
R558
1k8
6
UV-
D546
C546
R546
R553
(1)
1R5
C540
RU2
2µ2
220R
220R
C550
L540
BA157
220n
2200µ
1M8
Fokusblock
C556
W545
100p
Typ-Var.
9
C544
T540
(7)
C557
Typ-Var.
C545
Typ-Var.
C558
B543
B544
2200µ
100p
R557
3
UV+
Typ-Var.
(3)
1R5
D557
RU2
W620
L537
2
13
(11)
U33
200µ
12
11
B535
B533
U3.3
10
9
B557
8
U5
7
6
R573
5
3k3
4
B504
3
U12
2
U8
1
U25
W569
Vert.
rt
R564
R567
R569
470R
470R
470R
1
2
LOEWE.
UNF+ = +18V
Benennung:
UNF- = -18V
= EW GND
Basic-Board
UVID = 210V
R574
= Defl GND
UMUTE = +13V
Typ-Var.
MEDIA PLUS
UV+ = +13,5V
= HDGND
UV- = -13,5V
UG2 = 760V
= HPGND
Variante:
UB = 142V 24"4:3
alle Varianten
= SEKGND
UB = 142V 28"4:3
Code-Teile-Nr. Lpl.:
= Primär GND
UB = 138V 28"16:9
396-87715
UB = 138V 29"4:3
= Analog GND
UB = 146V 33"4:3
= NF GND
UB = 140V 37"4:3
Datum:
10.12.99
8
9
10
Oscillograms
Z
Y
0
0
0
500mV/Div DC
200V/Div DC
0.5V/Div DC
X
MP1
MP11
5.00µs/Div
5.00µs/Div
10.0µs/Div
DISE
U33
SDA4
SDA3
W
SCL4
V
0
0
0
2.00V/Div DC
50.0V/Div DC
5V/Div DC
MP2
MP12
5.00µs/Div
10.0µs/Div
5.00ms/Div
U
T
0
0
0
S
100V/Div DC
5.00V/DIV DC
5V/Div DC
MP3
MP13
5.00µs/Div
10.0µs/DIV
10.0µs
R
0
Q
0
0
200mV/Div DC
500mV/Div DC
500mV/Div DC
MP4
MP14
5.00µs/DIV
10.0µs/Div
2.00ms/Div
P
O
N
0
0
0
0.5V/Div DC
5.00V/Div DC
5.00V/Div DC
2.00ms/Div
MP5
MP15
10.0µs/Div
2.00ms/Div
M
0
L
0
0
5.00V/Div DC
0.5V/Div DC
500mV/Div DC
MP6
MP16
2.00ms/Div
50.0µs/Div
2.00ms/Div
K
J
0
I
0
0
10.0V/Div DC
0.5V/Div DC
500mV/Div DC
MP7
MP17
2.00ms/DIV
10.0µs/Div
2.00ms/Div
H
G
0
0
0
5.00V/DIV DC
1V/Div DC
500mV/Div DC
F
MP8
MP18
2.00ms/Div
100µs/Div
2.00ms/Div
E
D
0
0
10.0V/Div DC
0.5V/Div DC
MP9
MP19
5.00µs/Div
10.0µs/Div
C
0
B
Index
c
0
A
2.00V/Div DC
0.5V/Div DC
MP10
MP20
10.0µs /Div
20.0µs/Div
MP21
MP22
MP23
MP24
MP25
MP26
MP27
MP28

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