Test Mode; System Test Mode - Yamaha GX-505 Service Manual

TEST MODE

To facilitate inspection, measurement and location of any faulty point, 6 types of built-in Test Modes are provided,
one for each section.
• System Test Mode : Test mode for the system section. It is also used when entering the test mode for each section.
• Receiver Test Mode : Test mode for the receiver section
• Tape Test Mode : Test mode for the deck section
• CD Test Mode : Test mode for the CD section
• MD Test Mode : Test mode for the MD section (unused for this unit)
• All Function Test Mode : Test mode for all functions

SYSTEM TEST MODE

This test mode is used for the system section. Also, this mode must be executed first when entering the test mode
for each section.
Starting Procedure
In the STANDBY mode, press the STANDBY/ON button while pressing the RANDOM button and the PLAY/
PAUSE(CD) button simultaneously. Once the SYSTEM TEST MODE is set, causal factors for the previous power
off appear on the FL display.
Causal factors for power off at starting
Display
<Key Operate
<Off Timer
<Sleep Timer
<Auto Off
<I-Protect
<V-Protect
<Temp Over
<AC Cut
<??
Operation Procedure (Selection/finalizing of TEST MODE for each section)
1) Select the TEST MODE by the section name, pressing the wINPUT (up) or qINPUT (down) button.
Display
<Key Operate
Test RECEIVER
Test TAPE
Test CD
Test MD
Test All Func
Escape Test
2) Pressing the MUSIC button will shift the mode to the selected test mode.
For the details of the selected test mode, refer to the Ref. page in the above step 1).
Description
Power off by button operation
Power off by Off Timer setting
Power off by Sleep Timer function
Power off by Auto Power Off function
Power off by detection of an abnormal current value
Power off by detection of an abnormal voltage value
Power off by detection of an abnormal temperature value
Power off by AC power cut
Unknown
Description
Causal factors for power off are displayed.
(This state is available immediately after starting.)
RECEIVER TEST MODE
TAPE TEST MODE
CD TEST MODE
MD TEST MODE (Unused for this unit)
ALL FUNCTION TEST MODE
The test mode is canceled.
GX-505/GX-505VCD
Ref. page
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