Canon imageRUNNER 2520 Series, Service Manual, Page: 303 / 402

1. D-RAM test <(1) D-RAM TEST>
Checks to see if data can be correctly written to and read from D-RAM.
2. PG output <(3) PG>
Used to generate service test patterns.
3. MODEM test <(4) MODEM TEST>
Performs relay actuation, modem DTMF and tonal signal transmission/reception tests.
4. FUNCTION test <(6) FUNCTION TEST>
Used to verify the operations of microswitches, sensors, speakers and ADF functions.
■ Configuration
Numerals enclosed in parentheses denote a numeric keypad key to be pressed each.
Group subgroup Item 1 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
(3) PG
SELECT NO.01 Grid
SELECT NO.02 HT
SELECT NO.03 All-black output
SELECT NO.04 ---(For R&D)
SELECT NO.05 ---(For R&D)
SELECT NO.06 4dot-6space (vertical)
SELECT NO.07 dot-6space (horizontal)
SELECT NO.08 ---(For R&D)
SELECT NO.09 16 gray levels (monochromatic)
(4) MODEM TEST [1] - [9]
(1) RELAY TEST [1] - [2]
(1) RELAY TEST 1 NCU relay (and switch) ON/OFF test
(2) RELAY TEST 2 230 V common NCU test
(2) FREQ TEST [0] - [6] Frequency test
(0) FREQ TEST 462Hz
(1) FREQ TEST 1100Hz
(2) FREQ TEST 1300Hz
(3) FREQ TEST 1500Hz
(4) FREQ TSST 1650Hz
(5) FREQ TEST 1850Hz
(6) FREQ TEST 2100Hz
(4) G3 SIGNAL TX TEST [0] - [8] G3 signal transmission test
(0) G3 SIGNAL TX TEST 300bps
(1) G3 SIGNAL TX TEST 2400bps
(2) G3 SIGNAL TX TEST 4800bps
(3) G3 SIGNAL TX TEST 7200bps
(4) G3 SIGNAL TX TEST 9600bps
(5) G3 SIGNAL TX TEST
TC7200bps
(6) G3 SIGNAL TX TEST
TC9600bps
(7) G3 SIGNAL TX TEST
12000bps
(8) G3 SIGNAL TX TEST
14400bps
(5) DTMF TEST [0] - [9], * , # DTMF transmission test
(0) G3 SIGNAL TX TEST 300bps
8. Service Mode
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