Toshiba TLP510E, TLP510U, TLP511E, TLP511U

7-11

QV001

INPUT SELECTOR

CXA1855Q

VIDEO

RGB

LINEOUT

BUFFER

DAC

VOL / MUTE

SOUND OUT SPEAKER

1.5W

VOLUME

MUTE

CXA1315M

QA01 M5222FP

QA02 TDA7056A

7-3-7. Audio Circuit

Fig. 7-3-12 shows the audio circuit block diagram.

Signal path from the QV001 to the LINE OUT terminal

is: QV001 ® transistor buffer ® LINE OUT terminal.

Signal path from the QV001 to the speaker is as follows.

The audio signal developed from the QV001 becomes

one signal with its L and R signal components mixed.

The mixed audio signal enters the electrical volume IC

QA01 (M5222FP) and the output level is controlled

within a range of about 0 dB to –80 dB by an external

DC voltage (DAC). The audio signal thus controlled by

the IC QA01 is fed to the speaker amplifier IC QA02

(TDA7056A) and amplified by about 36 dB to drive the

speaker.

Fig. 7-3-12 Audio circuit block diagram

Contents

Main CONTENTS 1. MAIN POWER SUPPLY CIRCUIT 1-1. Description 1-2. Output Control 1-3. Voltage Switching 1-4. Over-voltage Protection 1-5. Over-current Protection 1-6. Overheat Protection 2. LAMP POWER SUPPLY CIRCUIT (LAMP DRIVER) 2-1. Configuration 3-1 3. OPTICAL SYSTEM 3-1. Configuration XGA 1.3 inch 3 plates system 4-1 4. R.G.B. DRIVE CIRCUIT 1024 pixels 1022 1023 1024 1 Sample hold Page 4-2. Operation Description 4-4 Table 4-2-2 Input terminal function description 5. MICROPROCESSOR 5-1. System Outline 5-2 Fig. 5-1-1 System block diagram 5-3 5-2. System Microprocessor 5-3. Power Supply Reset Process 5-4. Non-volatile Memory Control Process 5-5. Remote Control Reception Process 5-6. RS-232C Transmission/Reception Process 5-7. Status Read Process 5-8. Status Display Process 5-9. On-screen Display Process Table 5-8-1 Contents of the status display signals and the logic X: Lighting OFF ( ): Blinking 5-6 5-10. Video System Control Process 5-11. Panel System Control Process 5-12. Drive System Control Process 5-13. Various Display Modes 5-8 5-14. Applicable Signal 5-15. RS-232C Control Method 5-10 Table 5-15-3 RS-232C command list 6-1 6. DIGITAL CIRCUIT Fig. 6-1-1 6-1. Outline Page 6-3 6-2. Each IC Description Fig. 6-2-1 Page 6-5 Fig. 6-2-4 Page 7. VIDEO CIRCUIT 7-1. Circuit Component Page 7-2. Input Signal Switch Section 7-4 Fig. 7-2-2 Internal block diagram of CXA1855Q 7-5 7-3. Video Demodulation Block Fig. 7-3-2 Block diagram of TC9090AN Fig. 7-3-1 Pin configuration of TC9090AN ++ Table 7-3-1 Terminal function of TC9090AN TDA9141 7-6 43 2110 Sand castle pulse Fig. 7-3-5 Block diagram of TDA9141 7-7 Fig. 7-3-7 Block diagram of TDA4665T Table 7-3-2 Terminal function of TDA4665T Fig. 7-3-6 Pin configuration of TDA4665T 7-8 TDA4672 Fig. 7-3-8 Pin configuration of TDA4672 Table 7-3-3 Terminal function of TDA4672 7-9 TDA4672 Fig. 7-3-10 Pin configuration of TDA4780 7-10 Table 7-3-4 Terminal function of TDA4780 Fig. 7-3-11 Block diagram of TDA4780 Page 7-4. RGB Signal Amplification Section 7-13 Fig 7-4-2 Fig. 7-4-3 7-14 7-5. Microprocessor Interface Fig. 7-5-1 7-15 Table 7-5-1 8. CCD CAMERA CIRCUIT (For TLP511) 8-1. Outline Page 9. FLUORESCENT LAMP INVERTER CIRCUIT (For TLP511) 9-1. Operating Description 9-2. Troubleshooting