Philips 32PT740H37A Manual de Serviço Página 103
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Sync Selection
If the synchronization is derived from Y or Green, the H and V sync from the sync-slicer
must be selected.
• When YPbPr-signal or RGB-signal is 480p-format: sync signals will be V-770 and
H-770-2 sync.
• When YPbPr-signal or RGB-signal is 1080i-format: sync signals will be V-770
and H-770-3 sync.
When the sync is separate (H and V), the sync of the source must be selected.
The IO-4, IO-5 control-lines select the sync-inputs of the HEF4052 (7102.)
In our figure, these control-lines are named SYNC SELECT 2 and SYNC SELECT 1.
Via IO-6 line (called TRISTATE SYNC), the sync output can be put in tri-state.
Control Function
The different selections are made by the I/O expander, controlled by I2C.
These selections can be made with the user interface.
Audio
Audio left and audio right are connected via the two cinches and passed through the
module.
- IMPORTANT SAFETY NOTICE 2
- WARNING 2
- FIRE AND SHOCK HAZARD 3
- LEAKAGE CURRENT COLD CHECK 4
- LEAKAGE CURRENT HOT CHECK 4
- TV SAFETY NOTES 6
- PICTURE TUBE REPLACEMENT 7
- PARTS REPLACEMENT 7
- Technical Specifications 10
- Connections 11
- Rear Connections 13
- Mechanical Instructions 16
- Figure: 18
- 3D-Comb Filter Panel Removal 21
- Top Control Panel Removal 23
- Side I/O Panel Removal 23
- Rear Cover Mounting 24
- Test Points 25
- Service Modes 26
- Service Default Mode (SDM) 27
- Service Alignment Mode (SAM) 29
- Figure: SAM Menu 31
- Customer Service Mode (CSM) 33
- Problems and Solving Tips 36
- ComPair 38
- Specifications 39
- How to Connect 40
- Error Buffer 42
- Error Codes 43
- § SCL is shorted to SDA 46
- § a pause of 1.5s 48
- Protections 49
- I 2 C Related Protections 51
- HOP Related Protections 51
- Hardware Related Protections 52
- General and Repair Tips 53
- Figure: Start-up diagram 55
- Main Power Supply 56
- Horizontal Deflection 57
- Standby Power Supply 57
- Vertical Deflection 58
- Figure: Repair Tips 59
- Alignments 60
- Hardware Alignments 61
- PIP AGC adjustment 63
- PIP AFC adjustment 64
- Geometry 64
- Figure: Geometry alignments 65
- Black cut off Alignment 67
- Peak-White Alignment 69
- Tuner (Large Signal Panel) 69
- Option Settings 71
- Block Diagram 82
- Mains Filter (Diagram A1) 85
- Degaussing (Diagram A1) 86
- Main Supply (Diagram A1) 91
- Painter 97
- Closed Captioning 98
- RGB Output Selection 101
- Matrix 101
- Sync Slicer 102
- Sync Selection 103
- Control Function 103
- Video Processing 105
- Introduction 105
- ADC/DAC 106
- Dynamic Contrast 107
- PROZONIC 108
- General 109
- Video Control 110
- 2nd RGB Interface for OSD/CC 110
- Peak White Limiting 110
- Cut-off Control 110
- Geometry Control 111
- Line Drive (LINEDRIVE1) 111
- Frame Drive (FRAMEDRIVE+) 111
- East/West Drive 112
- Frame Rotation 112
- Guarding Protections: 112
- 3D Comb Filter (Diagram CO) 113
- The Linearity Correction 119
- The S-Correction 119
- The E/W-Correction 120
- Secondary Line-Voltages 120
- East-West Circuit 121
- The EW Drive 121
- Beam Current Correction 122
- Flyback Generator 124
- Audio Decoding 126
- Audio Processing 129
- CRT and SCAVEM (diagram F) 130
- Picture In Picture (PIP) 131
- Key Components: 132
- Block Diagram: 133
- Circuit Descriptions 134
- PIP Processing 135
- Guide+ (NAFTA only) 136
- Semi-Standby (NAFTA only) 136
- Power Supply 137
- Abbreviation List 138
- P01 P02 P03 P04 148
- P05 P06, P07 P13 P15 148
- P16 L02 L03 L04 148
- L05 L06 L07 L08 148
- F02 F03 F04 F05 149
- F06 F07 F08IN+ F09 149
- F10 A01 A02 A03 149
- A04 A14 A15 I2 SCL 149
- I3 SDA P17 V2 CVBS_INT V06 149
- V07 V08 V9 SDA V10 SCL 150
- F14 L08 I6 VIF - out S03 150
- S04 S5 Y-IN S06 H-A S07 V-A 150
- S08 V13 V-IN V14 V15 150
- V16 V17 SCL F17 F18 150
- F19 F20 L12 L13 151
- V19 V20 V21 V22 SCL 151
- V23 SDA V28 V29 V30 151
- C3 C4 HSYNC C5 VSYNC C6 151
- C11 C01 C02 C03 151
- EM1.1U AA(7644) 152
- All Models (7644) - HOP [B4] 165
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