Toshiba DP1810

The operation of the following items can be checked in the test mode (13).

Code	Item	Content
01	SRAM test	The read/write test is performed throughout the image memory. The test checks the whole SRAM. When an error is found, the address of the erroneous portion is displayed and the test is stopped.
02	DRAM test	The read/write test is performed on the DRAM. When an error is found, the address of the erroneous portion is displayed and the test is stopped.
03	Image processing RAM test	The read/write test is performed on the RAM used for the image processing.
04	CODEC test	The hardware test is performed on the CODEC block inside the SoC. The test encodes data of 10 lines using the MH coding, decodes it and compares it with the original data.
05	ADF test	Paper feeding, transporting and exiting are performed for originals. The number of the original sheets which exited is counted and displayed.
06	Button test	The buttons on the control panel are tested if they are operated properly.
07	LED test	All LEDs on the control panel are lit.
08	FROM test	The FROM is tested to see if it functions correctly. The checksum of the program data and function data stored in FROM is calculated and compared with the one reported in advance.

Key used in operation

Test result

Code	Item	Result
		Not abnormal	Abnormal
01	SRAM test	The following display is lit on the 7- segment LED.	The damaged memory address is displayed. The display can be shifted to 3 digits by the reproduction ratio button.
02	DRAM test	The following display is lit on the 7- segment LED.	The damaged memory address is displayed. The display can be shifted to 3 digits by the reproduction ratio button.
03	Image processing RAM test	The following display is lit on the 7- segment LED.	The following display is lit on the 7- segment LED.
04	CODEC test	The following display is lit on the 7- segment LED.	The following display is lit on the 7- segment LED.
05	ADF test	The number of exiting sheets is displayed on the 7-segment LED.	-
06	Button test	When all buttons are pressed and the [CLEAR] button is pressed, the following display is lit on the 7- segment LED.	When all buttons are pressed and the [CLEAR] button is pressed, if it is not detected that all buttons are pressed, the following display is lit on the 7- segment LED.
07	LED test	All LEDs are lit.	The abnormal LED is not lit.
08	FROM test	The following display is lit on the 7- segment LED.	The following display is lit on the 7- segment LED.

Notes:

1. Before the ADF test (05) is started, make sure that the equipment has no abnormality and paper is set on the original tray.
2. When the ADF test (05) is ready to start, “0” is displayed on the 7-segment LED and the [Start] lamp is lit. Pressing the [START] button starts the test.
3. In the button test (06), the [ENERGY SAVER] and [CLEAR] buttons are not included. (When the [CLEAR] button is pressed during the button test (06), the display returns to the test mode in which the code can be entered.)
4. In the LED test (07), the [ENERGY SAVER] lamp is not included.