Black Box IC515C Service Manual Page 102
- Page / 124
- Table of contents
- TROUBLESHOOTING
- BOOKMARKS
Rated. / 5. Based on customer reviews
99
25. RA-6 High Voltage Circuit Troubleshooting
Chapter 25 - RA-6 High Voltage Circuit Troubleshooting
FIGURE 25-1 - HIGH VOLTAGE STAGE - RA-6 CHASSIS
T8005
FBT
IC8007
PROT. 1
Q8028-9
ABL
DRIVER
Q8004
Q8016
Q8019
Q8020
H DRIVE
Q8023
H OUT
REG.
Q8027
DRIVER
Q8036
Q8037
IC8008
PWM GEN.
1
10
3
3
C8118
LOT
T8004
1
14
12
12
1
62
2 41
HV BLK
7
VIDEO
OUT B+
C B BD.
14
10
10
9
IC3006
VIDEO
PROCESS
40
7
3
5
IC8006
PROT. 2
5
3
2
D8025
D8023
+12V
CN8016
CRT
HV
R8171
100
+135V
D8036
15V
MIX OUT TO
IC8007
Q8035
HV REG.
P
CH
CN6106/
CN8013
CN8004/
CN3005
CN3007/
CN8006
V BD.
VEL MOD COILS
CN3023/
CN9001
CN3010/
CN9001
CN3001/
CN9001
+135V
SEC.P.S
IC6001
(G BD.)
D8039
200V
R8219
D8038
R8223
CN8022/
CN7304
D8029
D8030
C8142
ABL
R
R8153
PROT.
VR8002
100k
D8017
N
D8031
18V
D8034
D8035
R8160
R8198
10k
Q8021
Q8022
DRIVERS
Q8005,
Q8032
+15V
CN8021
A BD.
G BD.
D BD.
Q8038
HV OUT
D BD.
+135V
+135V
111
200V TO
R8196
8.1V
7.46VDC
7
11
S
D
G
D8015
LATCH
18
6
VR8001
5k
HV
1
1
7/17/0225.1TVP12
General Description
Figure 25-1 illustrates a block diagram in order to provide an overall view of the circuitry on the D board for
generating high voltage. The main components consist of a regulator stage to vary the B+ level to the flyback
transformer for HV level control, a driver and output stage to switch the flyback on and off, a flyback transformer
to generate HV and a LOT transformer to generate heater voltage and 200VDC for CRT cathode bias.
IC8008 is a PWM generator and driver to control the on and off time of HV regulator Q8035. The sawtooth
waveform for the PWM generator is synchronized to the horizontal drive pulse at pin 14 to provide a stable
reference. A sample of HV level is taken from the HV block assembly and enters pin 12 to provide an error loop
by which to vary the duty cycle of the drive pulses to Q8035. Q8038 provides the necessary switching to turn
T8004 and T8005 on and off and maintain a HV level of 31KV.
HV level and current are monitored by IC8006 and IC8007. They will stop high voltage generation to provide
protection for the HV components, CRTs and X radiation level. This is accomplished by disabling the H drive
pulse from video process IC3006. Both the HV level and shutdown threshold are shown as adjustable by
VR8001 and VR8002 but these controls are sealed with epoxy at the factory and are not adjustable.
- Projection Television 1
- Troubleshooting 1
- Table of Contents 2
- 28. Auto Registration 3
- 29. Model-to-Chassis 3
- Chapter 1 - Introduction 4
- 1. Features 5
- Voltage Regulation Errors 8
- Low B+ 8
- The Main Power Supply 9
- 1TVP14 1448 7/17/02 11
- B+ Regulator Troubleshooting 14
- 4.1TVP14 7/11/02 16
- 5.1BTVP14 1451 7/17/02 18
- Pincushion Correction 19
- Vertical Deflection 20
- 5.2TVP14 1449 6/17/02 21
- T & S Models 23
- 6.1TVP14 6/26/02 24
- 6.2TVP14 5/22/02 26
- FIGURE 6-4 - CRT DRIVE (CG) 27
- 6.5TVP14 6/26/02 28
- 6.6TVP14 5/22/02 30
- 6.7TVP14 5/22/02 31
- FIGURE 8-2 - STANDBY SUPPLY 34
- VCC Switching 35
- 8.5TVP14 6/26/02 36
- Unit Will Not Power Up 37
- Shorted Switching Transistors 38
- Regulator Troubleshooting 38
- FIGURE 8-6 - REGULATION 39
- FIGURE 9-1 - PROTECTION BLOCK 41
- FIGURE 9-2 - DC PROTECTION 42
- Horizontal Deflection 43
- FIGURE 10-2 - H OUT 44
- Horizontal Deflection Loss 46
- FIGURE 10-5 - VDSP 48
- Regulation 52
- 11.3TVP14 7/11/02 53
- High Voltage Protection 54
- FIGURE 11-5 - HV STOP 1 55
- FIGURE 11-6 - HV STOP 2 56
- 12.1TVP14 6/4/02 58
- FIGURE 12-2 - INPUT SWITCHING 59
- FIGURE 12-3 - 3D COMB FILTER 60
- 12.4TVP14 7/11/02 61
- 12.5TVP14 6/7/02 62
- 12.6TVP14 6/11/02 63
- FIGURE 12-7 - MID BLOCK 64
- FIGURE 12-8 - VIDEO PROCESSOR 65
- 6/24/0214.1TVP14 67
- 6/17/0214.2TVP14 68
- Standby Power Supply 71
- Primary Power Supply 71
- 16.2TVP14 1465 6/13/02 72
- Secondary Power Supply 74
- 16.3TVP14 1466 6/13/02 75
- 17.1TVP14 1464 6/24/02 77
- Pincushion Troubleshooting 80
- 18.1TVP14 1468 7/10/02 81
- 18.2TVP14 1462 82
- 19.2TVP14 1469 6/11/02 86
- *SERVICE MODE 88
- 23.1TVP14 1472 6/12/02 96
- 23.2TVP14 1471 7/11/02 98
- 24.1TVP14 7/17/02 100
- 24.2TVP14 1473 6/13/02 101
- General Description 102
- 25.2TVP14 7/17/02 105
- 26.1TVP14 1477 7/17/02 107
- 26.2TVP14 1474 6/13/02 109
- 26.3TVP14 1475 6/13/02 110
- 26.4TVP14 1476 6/13/02 111
- Overview 112
- 27.1TVP14 6/19/02 113
- Flash Focus 118
- Error Codes 121
- 07/18/02 124
Related products and manuals for Unknown Black Box IC515C
Unknown Black Box PC473C User Manual
(50 pages)
(50 pages)
Unknown Black Box IC109AE User Manual
(40 pages)
(40 pages)
Unknown Black Box AC470A User Manual
(16 pages)
(16 pages)
Unknown Black Box AC2000A Specifications
(45 pages)
(45 pages)
Unknown Black Box LB510A-R2 Specifications
(12 pages)
(12 pages)
Unknown Black Box IC515C User Manual
(20 pages)
(20 pages)
Unknown Black Box LR0301A-KIT Specifications
(16 pages)
(16 pages)
Unknown Black Box 39004 User Manual
(8 pages)
(8 pages)
Unknown Black Box LB1351A User Manual
(14 pages)
(14 pages)
Unknown Black Box AC328A-R4 User Manual
(23 pages)
(23 pages)
Unknown Black Box Local Mux-6 Specifications
(26 pages)
(26 pages)
Unknown Black Box RS-530 Specifications
(17 pages)
(17 pages)
Unknown Black Box Local Mux-6 Specifications
(27 pages)
(27 pages)
Unknown Black Box Local Mux-6 Specifications
(44 pages)
(44 pages)
© 2020, manymanuals.com. All rights reserved. | 0.125 s |
Manymanuals.com
Manymanuals.de
Manymanuals.fr
Manymanuals.it
Manymanuals.pl
Manymanuals.cz
Manymanuals.es
Manymanuals-pt.com
Comments to this Manuals