Yamaha ACD1 Service Manual page 42

ACD1
3-10. SWITCH test (NO. 11)
Contents: Press every key on the panel in the designated order, and check the response.
Example of executing screen
*** 11. SW
Hit the key
[INC
NG:[ENTER]
Operation
1. Press the key on the panel shown on the PC.
2. When the displayed key is identical with the pressed key, the name of the key to be tested next will be shown on the PC.
Check all the keys in the same way. (No response will take place if a key other than the displayed key is pressed.)
3. If it turns to be OK after all the keys have been examined, the program will return to the original testing item selection list
screen.
4. If there is no response after pressing the correct key, it is considered as NG. In that case, press the [ENTER] key of the PC to
return to the testing item selection list screen.
Check items
・ Check the FFC connector (BRG circuit board: CN102), peripheral circuit boards and PN circuit board.
3-11. D-SUB (32) – D-SUB (39) test (port by port individually) (NO. 12–19)
Contents: Input external sound signal at specifi ed level and measure the level using the dedicated test jig (refer to 1-3.). Check
also the Protection and Model ID operation with MUTE [3][4] and Standby.
Example of executing screen
*** 12. D-SUB(32)
D-SUB(32) OK!
[D-SUB (32) test screen (in case of OK)]
Example of executing screen
*** 12. D-SUB(32)
D-SUB(32) NG!
OUTPUT LEVEL[32]:NG
OUTPUT LEVEL[33]:NG
OUTPUT LEVEL[34]:NG
OUTPUT LEVEL[35]:NG
MODEL ID:NG
PROTECTION[32]:NG
PROTECTION[33]:NG
PROTECTION[34]:NG
PROTECTION[35]:NG
STANDBY:NG
[D-SUB (32) test screen (in case of NG)]
42
***
]
[SWITCH test screen]
***
EXIT:[ENTER]
***
EXIT:[ENTER]