Loewe XELOS 5270ZW Serviceanleitung Seite 75

1 2
R478
33k
Stereoendstufe
Final stage stereo
C478
2n2
4 I474
TDA2030
L479
*
C477
220n
I
W471
gn / green
W470
2 C479
* 220n
1
7 W491
*
6
5 3 an, to Kühlblech/Heat Sink
U12
4 2 I474, I484
R488
3 1 33k
W481
2 ge / yellow
1
2
1
H
L489
*
4 I484
TDA2030
C488
2n2 C487
220n
C489
220n
G
F
Netzteil
Power supply
R621
56k
2W
E
C623
6 2E R627
220n
10k
7 8
R623
4k7
3
I611
R622 P633 R633
820k TDA4605-3 470R 1k8 D636
C632
BA157
220n
1
C634
D C636
C631
R632 1µ
4n7
4n7
82R
2 4
R634
R630 Q624 2D
680k
5
10R BUZ91
C637
1D
4n7 D630
R628
1N4148
R624 39k
120R 3W
D624
C
BYW96-D
an Bedienteil B622
to Control unit
R613
1R5/7W
T612
*
W612 W611
C612
220n
2 2
B
1 1
D613
B250C3200
Netz in C611
220n
F611
R619
T3,15A
W619 *
Entmag.
C619
2
100n
1
A
an Entmagnetisierung Netzspannungs-Potential
to Degaussing Supply voltage potential
1 2
3 4
an,to Signal Board W971
UNF+
C472
R473
22µ
1k
2 1 2 3 4 5 6 7 8 9 10
W610
C474
10n R474
33k
R472
C476
10k
1µ
1
U5
C466
2200µ
UNF- UNF+ UNF+
D474
1N4148 C467 R466
22n 470R
3W
C465
100p
R468
C469
470R
22n
3W
UNF- UNF-
UNF+
R483
1k
U25
2
F655
C482 Br.
C485
22µ
1n
an,to W201 SAT
R484 R482
33k 10k
1
C484
C486
10n
1µ
UNF-
C492
4µ7
R492
1k
D491
1N4148
R691
R491
3R3 100R
D651
L650 FUF5407GP
T639
22
UB
C650
D622 C651
R618 *
BA157 47u
Br.
6
R690
R629 R626 20 1R
D656
C691
22R 22R
L656 BYW98
100µ
19
U25
F656
C656 C657
T1.25A
680p 470µ
C661
5 U14
680p
18
D661
L661 BYW98
17
F661
C622
T2.5A C662
100µ
470µ
Q663
C626 C627
BUZ71A
33n 150p
8
D671
U7
L626 F672
T5A MA750 C673
330n
15 2
1
3
C682
680p
16 C672 Q674
4700µ BUZ71
I676
D681
10 14 TL431AC
C620
F689
BA157 C681
D686
T630mA
220µ
BYW98
L686
330µ 13
UNF+
R686
L685
0R1
R685
R687
D687 68R
0R1
BYW98 2W
T618
12
*
W-TRAFO
C688
680p
L687
C639 UNF-
2n2/4kV
C689
220n
R639
10M
Geräte-Potential (erdfrei)
Set potential (off ground)
3 4
5 6
an,to Signal Board W701
11 12 13 1 2 3 4 5 6 7 8 9 10 11 12 13
U8
U12
6H
U12
7H
W650
10G
1
2
3
4
Hyperband Tuner
5
R657 U25
4k7
Hor.
R658
4k7
D532
L521
BYW98
22µ
R521
3R3
B549 T528
Tr
R532
C521
*
R692 100µ
100R
7F R529
4k7
C524 R527
1µ 4k7
D527
B673 EU02
1R
R526
C527
56R
220n
B674 I691 C528
1R L78S09 680p
Q526
2SC3944
1 3
IN OUT U9
GND
D526
C694
C693 1N4148
C692 100µ
330n
330n
I663
R654
L7808 R587 4k7 L588
100R
1 3 22µ
U8 Q582 Q589
IN OUT
GND
BC557B BC557B C588
C667
10µ
C660 C666
100µ
100µ 330n
U12 R589
3k3
U25
C668
220µ
Q593
C665 C582
BC557B
330n 100p
R693
R668
R583
10k R593
4k7
390k
I674 10R
R584
C677
TL431AC R582
33k R585
220µ
10k
150R
U5
C674
C581
22n C676
4n7
R664 330n
R586
1k
1k Q586
R677
BD537
10k
1% VPROT
V-
R679
E1 V+
R678 220k
10k
C563
1% R563
220µ
470R
VFLB
R688
R681
D568
68R
* 6B
Br.
2W
D561
Q682
BA157
BD536(PN
UNF+
2
UV+ FLYBACK
GENERATOR
C562
220n
I561
Q681 4
UV-
R684
BC557B TDA8177
*
C569
220n
Vert.-Ablenkung
R683 R682
Vert. deflection
* *
5 6
7 8 9
an,to Signal Board W003
W211
1 2 3 4 5 6 7 8
U9
R206 D206 C207
18k MA4300 100n
UB
R207
18k
U33
B216
U5
B215 L202
L203
Br.
47µ
U9
C202 C204
100n 100n
Hor. Endstufe
W532
Kont Hor. final stage
1
2
L530
22m B536 B537 8G
T531
12
B532
(9)
R518
8F 10R
C532
L531
D531 100p
R531
R517
L532 RU2
*
22R
Br.
Q534
R533 2SC4542
R516
Q532
12R D533
22R Q531
ZTX614
R525 BA157
ZTX712
5
4k7
(5)
R534
C533 3R3
R524
4k7 R536
100p
10k 1
C535 (12)
R537 100µ
C531
D541
* 10k
7
(2)
R541
BA157
C541 R538
R535 3R3
* 100k
100k
C537
100p
C543 D539
* ESC011 Q533
C538
BF422
L534 47µ
150µ R549
150k
U12
R555
UB
C546
1k8 R546 R553
C555 D546 220n
220R 220R
100n C540
2µ2
BA157
8E
R540 L540
1m8
L590 C542 47R
1m6 *
C544
L538
*
*
R543
1k5
R592 L537
1R *
(11)
8D
O/W-Korrektur
R591
E/W-correction
1R
C590
8C 4µ7
7C
R573
R566
3k3
R578
82k
82k
C567 W569
Vert.
1n5
R565 rt / red
R569
7B
40k2
470R 1
C568
2
470n
R564 R567
470R 470R
R568
1R5
UNF+ = +18V
UNF- = -18V
UV-
UVID = 210V = EW GND
R574
UMUTE = +13V
*
= Defl GND
UV+ = +13,5V
7A
C578 UV- = -13,5V = HDGND
1n5
UG2 = 760V
= HPGND
UB = 142V 21" 4:3
C577 R579
C579 UB = 136V 23" 16:9 = SEKGND
* 40k2
*
UB = 142V 24" 4:3
= Primär GND
UB = 142V 28" 4:3
UB = 136V 28" 16:9 = Analog GND
UB = 140V 29" 4:3
= NF GND
7 8 9
Oscillograms
10
W217 W216
1 1
0
2 2
an,to W188 SAT
9 10 11 12 13
2V/Div DC; 1 D
3 3
5 us/Div
W250
8
DISE
7
I
U33 0
6
SCL5 100V/Div DC;
2 D
5 5 us/Div
SDA3
4
SCL4
3
2
1
0
C208
an,to W181 SAT
10n
500mV/Div DC; 2 E
5 us/Div
H
0
U202
10V/Div DC 6 B
5ms/Div
Tuner
0
500mV/Div DC; 6 H
5 ms/Div
G
R545
*
0
500mV/Div DC; 7 A
2 ms/Div
32KV
C511
FOCUS R551
22µ F
0
150k
10V/Div DC; 7 B
R550 2 ms/Div
UG2
2k2
an,to
R552
W301 CRT-PCB
1M
W548
R542
C549
1k8 22n
4
(13)
D548
UF 0
13 3
1N4148
10 2 500mV/Div DC; 7 C
2 ms/Div
(8)
1
D549
R548
MA4300
120R D547
rt / red
E
BA159 L547
4
(4)
R547
2
C547
3R3
0
100p
1
10V/Div DC; 7 F
C548 10 us/Div
8
W549
22µ
(6) L553
D558
sw / blk
*
RU2
6
UV-
(1)
R558
1R5 C550
0
2200µ
C556
500mV/Div DC; 7 H
100p
9 10 us/Div
D
(7) C557
100p
C558
2200µ
R557
1R5
3
UV+
(3) 0
D557
RU2 500mV/Div DC; 8 C
5 ms/Div
2
13
U33
12
B535 11
U9
10
C
9
0
8
U5 5V/Div DC; 8 D
7 B557 5 ms/Div
6
5
4
3
U12
2 B504
U8
0
1
U25
50V/Div DC; 8 E
5 us/Div
W620
*
0
B
* = Typ-Var.
LOEWE.
Benennung:
2V/Div DC 8 F
5 us/Div
Basic Board
Q4100
0
200V/Div DC 8 G
10 us/Div
Code-Teile-Nr. Lpl.: Index A
390-87185.172-183 h
Datum: 15.10.98
0
10
10V/Div DC 1 0 G
20 us/Div