26
L9.1A
/78
(REDUCED FREQUENCY)
Iref
Sync
Vdem in
Vref
UVLO1
Iref
CONTROL
Dmax & SOFT-START
Vovp out
R standby
P
CURRENT SENSE INPUT
OVERVOLTAGE
MANAGEMENT
Vref
Soft Start & Dmax
Iref
Vdem out
Vcc
GND
Vc
OUTPUT
BUFFER
Vref
OSCILLATOR
SUPPLY &
INITIALIZATION BLOCK
BLOCK
REFERENCE
MANAGEMENT
PROTECTION
OVERVOLTAGE
AMP
ERROR
STANDBY
THERMAL
SHUTDOWN
CURRENT
SENSE
T
R standby
F
2.5V
VOLTAGE
FEEDBACK
FOLDBACK
FOLDBACK INPUT
18V
UVLO1
C
Iref
Vcc
enable
Vref
E/A OUT
DEMAGNETICATION
Vosc prot
Vosc
Q
Set
Reset
Latch
Rref
+t
t
G
H
F1 E11
0211 B1
0212 A3
0213 A4
0231 B1
0241 E11
1500 B2
1571 C8
1572 E10
1573 C9
1580 A7
2500 B3
2501 B2
2502 B4
2504 A3
2505 A4
2507 C6
2508 B5
2510 C6
2511 C6
2517 C3
2518 C5
2520 E1
2521 F5
2522 G5
2524 C3
1
2
3
4
5
6
7
8
9
10
11
1
2
3
4
5
6
7
MRT
1572
8
9
10
11
470R
3501
A
B
C
D
E
F
G
H
A
B
C
D
E
F
12
13
5545
W8019
10
11
2529 D1
2530 H4
2531 F1
2532 F1
2533 G1
2534 G1
STH8NA60FI
7518
2540 F5
2541 B9
TCDT1101G
7581
1
2542 B11
2545 G7
2550 D10
2551 D11
2561 E10
2562 D8
2564 D9
2565 D9
2571 C10
2572 D8
2573 F8
2574 F8
2575 E8
2576 F7
2577 C10
2n2
2504
2586 A9
3501 B3
3502 C1
3503 A6
3505 B3
3506 C4
3507 C4
3508 D10
3509 B6
3510 C2
3511 C6
3512 H5
3513 G5
3514 D5
3515 B5
3516 H3
3517 C4
3518 D6
3520 E1
3521 D5
3525 C3
3528 D2
3529 D1
3530 C1
3532 F1
3534 G1
3536 F1
3537 E3
3542 C1
3543 B9
3544 B9
3545 B10
3546 B10
3547 A10
3570 F9
3571 F9
3572 F10
3573 F9
3574 F8
3575 F8
3576 E8
3577 F6
3578 F7
3579 F9
3585 E9
3592 B8
3594 A8
3595 A9
3596 A8
3577
10K
3597 A9
3598 A9
3599 B9
4501 G1
4999 F11
5500 B3
5502 B3
5516 D7
5518 C6
5521 G5
5540 E6
5545 C7
5550 D9
5551 D11
5552 C4
5572 C9
5573 E9
5575 C8
5576 D9
5577 D10
6500 B3
6501 B3
6505 B4
6507 D4
6508 D4
16
11
9
2
1
14
6510 C2
6511 C6
6512 D6
6513 D6
6514 C4
6515 B6
6517 B6
6540 E6
6542 B9
6543 B10
6550 D10
6560 D9
6570 C10
6580 C10
6582 C11
6584 A8
2540
100u
6500
6585 A8
6590 C10
6591 A8
7518 C4
7520 E2
7542 B10
7570 G8
7581 E7
7590 B8
7591 B8
7592 B9
9500 B1
9501 C1
9502 B3
9503 C3
9505 C4
9506 B5
9507 B3
9508 C3
9509 C11
9510 E5
2n2
2502
5577
BA
V21
6560
EGP20DL
5502
2m2
2561
2577
1m
2550
82p
2520
3576
10K
3537
33K
3508
5518
2562
220p
B57237
3515
3509
33K
6505
GBU4J
6585
1N4148
1n5
2510
3516
1K
33K
3510
1K
3511
10K
3598
100R
3528
160K
3571
2571
3544
27K
MRT
6582
1573
P3
B2P3-VH
0211
1
2
6513
1N5062
1K
3578
9505
*
FOR ITEM NR.MARKED WITH
*
BC847B
33n
2573
330p
2524
15K
3534
1500
2m2
6570
3579
1K
1n
2531
470p
2521
3n3
3521
330R
7590
BYD33J
6508
100R
3585
P5
100MHZ
100R
3597
22K
3599
9503
12K
3570
33R
3525
2530
1u
2572
100p
3542
4M7
9506
ZPB
3503
6580
SB140
BAV21
6540
1
4
2
3
3547
1K
(0.1V)
(1V)
1.2V
RES
RES
ADJ
A7-1
(7.9V)
*
RES
2.4V
(0V)
*
(13V)
*
A6-49
0V
2.5V
(0V)
15.6V
0.2V
15.2V
*
*
11V
RES
(313.7V)
2.5V
(1V)
(1.7V)
0V
For ITV
11.4V
0V
*
*
140V (IF 5550 MOUNTED)
(12.1V)
A3-49
*
0V
*
(2.4V)
13.6V
2.2V
130V (IF 5576 MOUNTED)
*
(7.4V)
1.2V
*
3u3
(2.5V)
11.5V
0.7V
*
*
*
FOR CINCH ONLY
(0.1V)
*
For ITV
170-250V SINGLE RANGE (EURO)
(2.5V)
100-120V SINGLE RANGE (USA)
(10.4)
RES
16.7V
*
VBATT
2K0
*
14.8V
NOT FOR USA
140V (IF 5550 MOUNTED)
*
*
*
REFER TO DIVERSITY TABLE
T4E 250V
TO F1A
0.2V
(-V) STANDBY OPERATION
-V NORMAL OPERATION
0.2V
For Testing
*
DEGAUSSING COIL
13V
2V
2.5A
2.2V
309.7V
(12.6V)
14.7V
(2.6V)
(1.9V)
(0V)
*
2.5V
100-250V FULL RANGE (A/P,LATAM)
*
2.9V
*
*
T1A
(1.8V)
(13V)
T1A
*
*
1.2V
(2.9V)
RES
RES
*
*
9.6V
*
*
(0V)
2.6V
307V
(2.5V)
0.7V
10V
(0.1V)
130V (IF 5576 MOUNTED)
EGP20DL
F1
1
EGP20DL
BZX79-C30
6501
2522
3n3
MC44603A
7520
10
7
8
13
5
4
3
6
15
12
33n
2501
2n2
2533
EGP20DL
BYD33J
6507
2500
470n
9507
3546
47K
5516
100MHZ
100R
3575
1K
3517
82K
3520
5552
BC847B
7592
9500
9502
15K
3512
3594
22K
BC847B
7591
2575
100n
1u
2565
2564
1u
5
6
8
9
1
3
2
4
4999
SDKE
0231
+VBATT
9
2534
180K
3513
14
15
16
17
18
2
3
4
5
8
6K8
3532
3596
10K
6550
BY229X-800
23
14
6590
5540
4U7
1580
G5P
BZX79-C20
6510
4501
0R22
3518
MRT
1571
P1
DMF-2405
5500
5521
2U2
BYV95C
6511
68R
3529
5576
100MHZ
HOT GROUND
9510
3545
33K
3595
68K
1N4148
6584
P4
1N5062
6512
DMF28
1
4
2
3
6591
BAS216
470p
2511
2576
6n8
6514
BZX55-C18
3K3
3530
2532
470p
AudioSupplyGnd
100MHZ
5575
1
3
2574
9501
2508
330u
7570 TL431CLP
2
9508
2M2
3502
33K
3574
18K
3536
6515
BYD33J
BYD33J
6517
3507
2R2
47u
100MHZ
5572
5573
2551
P6
0241
1
2
3
4
5
1n
2517
2542
47u
3505
DSP
6542
470p
2518
3514
820K
9509
3506
5
4
2
3592
10K
3573
5550
100MHZ
B2P3-VH
0212
1
2
5551
27u
BC857B
7542
2507
1n5
2n2
2505
0213
1
2
3572
220u
2586
2541
BAS216
6543
3543
220K
100n
2529
Vaux_1
2545
1n5
MainSupplyGnd
Vaux
MAINS_IN_A
Vaux
AudioSupply
CRT_DISCHARGE
+VBATT
Vaux
MainSupply
+VBATT
AudioSupply
AudioSupplyGnd
MAINS_IN_B
11V
Reset
P2
P2
P1
2V / div DC
10
µ
s / div
2V / div DC
10
µ
s / div
50V / div DC
5ms / div
50V / div DC
5ms / div
P2
P3
15V DC
P4
138V DC
P5
11.8V DC
P3
12V DC
P4
138V DC
P5
9.8V DC
P6
13.8V DC
P7 8V DC
P6
16V DC
P1
= 0V
FONTE DE ALIMENTAÇÃO
7
Esquemas Elétricos e Guias de Placas
Summary of Contents for 21PT836A/78
Page 23: ...23 L9 1A 78 6 Localização de Defeitos Esquemas e Resumo ...
Page 24: ...24 L9 1A 78 6 Localização de Defeitos Esquemas e Resumo ...
Page 34: ...34 L9 1A 78 7 Esquemas Elétricos e Guias de Placas ...
Page 36: ...36 L9 1A 78 7 Esquemas Elétricos e Guias de Placas ...
Page 44: ...44 L9 1A 78 7 Esquemas Elétricos e Guias de Placas ...
Page 46: ...46 L9 1A 78 Painel AV Lateral Fone de Ouvido CL 06532025_031 eps 030400 ...