7-3-2. Video/Color Circuit
The video/color circuit consists of two ICs, QV005 (TDA9141: NTSC/PAL/SECAM DECODER), QV006 (TDA4665T: BASE BAND DELAY LINE), and supports each system of NTSC, PAL and SECAM.
Fig. 7-3-4 shows the pin configuration of TDA9141 and Fig. 7-3-5 shows the block diagram of TDA9141. Fig. 7- 3-6 shows the pin configuration of TDA4665T and Fig. 7-3-7 shows the block diagram of TDA4665T.
| Color difference signal | Color difference signal |
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| 32 | SECAM reference | ||||||
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| 31 | Second crystal | ||||
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| Uin | 3 |
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| 30 | Reference crystal | |
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| Vin | 4 |
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| 29 | CPLL |
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| SCL | 5 |
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| 28 | Filter reference | ||
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| TDA4665T |
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| SDA | 6 |
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| 27 | Analog ground | |||
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| Supply | 7 |
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| 26 | Y/CVBS in |
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| Digital supply decoupling | 8 |
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| 25 | Cin |
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| Digital ground | 9 |
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| 24 | HPLL |
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| Sand castle | 10 |
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| 23 | Fscomb |
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| Sand castle pulse |
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| VA | 11 |
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| 22 | Address in / CVBS out | ||
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| Yout | 12 |
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| 21 | R |
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| Vout | 13 |
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| 20 | G |
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| Uout | 14 |
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| 19 | B |
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| I / O port | 15 |
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| 18 | F |
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| TDA9141 |
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| O port / LLC | 16 |
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| 17 | CLP / HA |
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| (NTSC/PAL/SECAM) |
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| Vertical acquisition |
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| synchronization pulse |
| GREEN | Chrominance |
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| Serial data | Serial clock | Horizontal | Sand castle |
| Clamping | pulse/ | input |
| U input |
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| HA synchronization | RED |
| BLUE | Fast switch |
| Chrominance |
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| input/output | input | PLL filter | output |
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| pulse input/output | input |
| input | select input |
| voltage input |
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| 24 | 10 |
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| 17 | 21 | 20 | 19 | 18 | 3 | 4 |
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| VA |
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| 14 | Chrominance |
Address |
| I 2 CBUS |
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| TIMING |
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| U output | ||
| VERTICAL |
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| HA |
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| MATRIX | SWITCH | 13 | Chrominance | |||||||||
input | INTERFACE | SYNC |
| GENERATOR |
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(CVBS output) |
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| 12 | V output | ||||
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| Luminance output | ||
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Input/output |
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port |
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| LCA |
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Output port/ |
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16 |
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| SYNC |
| HORIZONTAL |
| TDA9141 |
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| IDENTIFI- |
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clock output |
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| SEPARATOR |
| PLL |
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| CATION |
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| 32 | SECAM reference |
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| decoupling | |
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Chrominance | 25 | CHROMINANCE |
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| CLOCHE |
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| SECAM |
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input |
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| ACC |
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| DEMODU- | SWITCH |
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| FILTER |
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| TUNING |
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| LATOR |
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| 28 | Filter reference |
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| decoupling | |
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Luminance/ |
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| CHROMI- |
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| PAL/NTSC |
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26 | DELAY | TRAP |
| NANCE |
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| PLL |
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| DEMODU- |
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CVBS input |
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| BANDPASS |
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| LATOR |
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Digital | 8 | BIAS |
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| FSC |
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supply |
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| BUFFER |
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decoupling |
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| 27 | 9 | 7 |
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| Analog | Digital | Positive supply |
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| PLL | Reference | Second | Comb | filter |
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| ground | ground |
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| loop | filter | crystal input crystal | status | input/output |
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| input |
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