Toshiba TLP511U, TLP511E, TLP510E Power Supply Reset Process, Non-volatile Memory Control Process

5-3. Power Supply Reset Process

In the power supply reset process, power supply reset IC (RN5VD27A), QL004 is employed.

The reset IC,QL004, develops the reset signal when the power supply voltage for the microprocessor varies and becomes lower than the specified voltage, and sends the signal to the reset terminal of the system microprocessor (QL002).

5-4. Non-volatile Memory Control Process

In the non-volatile memory process, data reading and saving for various adjustments are carried out on the non-volatile memory, QL006 (CAT24C16J).

When the power (AC) is on, all the adjustment data are read out by the system microprocessor (QL002), then the previous status is realized.

When saving the data, all the adjustment data are written by the system microprocessor (QL002), then the current status is preserved.

However, if a failure (such as power interruption due to lightning, etc.) occurs during the adjustment data writing, a data error may occur. If the data is determined as incorrect, the initial data memorized on the system microprocessor (QL002) is read out and stored on the non-volatile memory.

5-5. Remote Control Reception Process

In the remote control reception process, a remote control unit (CT-9925) connected to the remote control terminal emits a remote control signal and a remote control signal receive section on the front panel, the rear panel or the camera arm (for TLP511) decodes the signal.

The remote control signals for rear panel and camera section (for TLP511) are selected by QL012 buffer (TC74HC125AF). Then both signals are mixed with the remote control signal for front panel through QL005 buffer (74HC14AF).

Finally, the signal mixed is supplied to the remote control terminal of the system microprocessor (QL002).

5-6. RS-232C Transmission/Reception Process

In the RS-232C transmission/reception process, an RS- 232C signal entered through the RS-232C connector (D- SUB 9P) is decoded in the RS-232C interface (mPD4721), and fed to RXD1 terminal of the system microprocessor (QL002).

In the RS-232C transmission process, RS-232C signal developed from TXD0 terminal of the system micropro- cessor (QL002) is decoded in the RS-232C interface (mPD4721) and fed to the camera microprocessor section.

					5-7. Status Read Process
					In the status read process, the following status shown in
					the table below are read by QL010 (74HC165AF) and
					the error process corresponding to each status is carried
					out.
					Table 5-7-1 shows the contents of the status read signals
					and the logic.
	Table 5-7-1 The contents of the status read signals and the logic
Signal name	A	B	C	D		E	F	G	H
Pin No.	11	12	13	14		3	4	5	6
QL010	FAN1. ER	FAN1. SW	FAN2. ER			TEMP1. ER		LAMP. ER	MAIN. ER
(L)	Abnormal	Normal	Abnormal			Normal		Abnormal	Abnormal
(H)	Normal	Abnormal	Normal			Abnormal		Normal	Normal

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