Panasonic Viera TC-P50S60, Technical Manual

Page: 24 / 106

Slide 24
1. AC from connector P9 flows through the resistor across the relay switch energizing the standby circuit.
2. Note: At this point the relay has not been triggered.
3. The standby circuit outputs the STB5V to pin 5 of connector P6. The STB5V is applied to the
Application Specific IC (IC5000).
4. IC5000 outputs the STB3.3V used to energized the microprocessor IC8000 on the A board and the
remote control receiver on the K board.
5. IC5000 also outputs the reset pulse to IC8000 to prepare the microprocessor for program execution.
6. IC8000 outputs the F_STB_ON command (DC1.5V ~ 3.2V) for approximately 8~11 seconds.
7. Note: This command is also the first out of 2 command output by IC8000 when the power is turned on.
8. F_STB_ON is applied to pin 6 of connector P6 on the P board to be connected to the power micom
(IC502).
9. IC502 outputs 2 switching signals to:
1 st Turn on the switching circuit to allow the triggering of the relay RL100. AC flows now through the
relay’s contacts.
2 nd Turn on the switching circuit to allow F15V and S15V to be output to the A board via connectors
P6/A6.
10. The S15V is applied to the audio amp. ICs (IC4900 and IC4901).
11. The F15V is applied to a DC-DC converter circuit to generate the SUB Voltages used by the A board
for signal processing, the K board for CATS (Contrast Auto Tracking) operation, the bluetooth module,
the C boards, and the panel.
12. The sub voltages are also provided to IC8000.
13. If all SUB Voltages are OK, IC8000 waits for approximately 8~11 seconds and then it stops outputting
the F_STB_ON command.
14. At this the relay is no longer energized and it makes a click sound. The F15, S15, and all the SUB
Voltages are no longer present.
First 8 seconds after the TV is first plugged in (Block Diagram)
TC-P55/60/65 S60
TC-P** ST60 (All ST60)
Standby Circuit Explanation