Canon ImageCLASS MF4690, Service Manual

Page: 166 / 182

Chapter 14
14-26
1. D-RAM test ((1) D-RAM)
Checks to see if data can be correctly written to and read from D-RAM.
2. Scan test ((2) SCAN TEST)
Used to adjust contact sensor output and the position at which a document fed from the ADF is scanned.
3. Print test ((3) PRINT TEST)
Used to generate service test patterns.
4. Modem test ((4) MODEM TEST)
Performs relay actuation, modem DTMF and tonal signal transmission/reception tests.
5. Aging test ((5) AGING TEST)
Not used.
6. Function test ((6) FUNCTION TEST)
Used to verify the operations of microswitches, sensors, speakers and ADF functions.
7. Roller cleaning mode ((0) ROLLER CLEAN)
Used to clean the delivery roller or ADF pickup roller by idling them.
14.13.1.2 Test Mode Menu List
0016-2121
Test mode menu list
To invoke test mode, follow these steps:
1) Enter service mode.
Press the operation panel Additional functions key, 2 key, 8 key and Additional functions key in this order.
2) Press the operation panel arrow keys to show "TEST MODE."
3) Press the OK key.
T-14-22
Numerals enclosed in parentheses denote a numeric keypad key to be pressed each.
Group Subgroup Item 1 Item 2 Item 3 Explanation
TEST MODE [1] - [9], [#]
(1) DRAM [1] - [2] D-RAM data check
(1) D-RAM TEST Write/read check
(2) D-RAM TEST Read check
(2) SCAN TEST [1] - [8]
(1) SHADING Automatic gain adjustment
(3) SHEET POS ADJ Not used
(4) TRASH DETECT Not used
(5), (6), (9), (*) Not used
(3) PRINT TEST [1] - [9]
(1) Not used
(2) All-black output
(3) Not used
(4) Back belt output
(5), (6), (7), (8), (9), (*) Not used
(4) MODEM TEST [1] - [9]