Display Provided When Diag Started - Yamaha RX-V1500 Service Manual

RX-V1500/DSP-AX1500

• Display provided when DIAG started

When the monitor is connected, DIAGNOSTIC MENU
appears on its screen as shown in the figure. (It remains
on display until DIAG is cancelled.)
The FL display of the main unit displays the protection
function history data and the version (1 alphabet) and the
DIAG menu [sub-menu (YSS 0dB) of DIAG menu No.1
DSP THROUGH] a few seconds later.
When there is no history of protection function:
When there is a history of protection function:
Cause: An excessive current flowed through the power
amplifier.
Turning on the power without correcting the abnormality
will cause the protection function to work immediately and
the power supply will instantly be shut off.
Note)
• Applying the power to a unit without correcting the
abnormality can be dangerous and cause additional
circuit damage.
• The output transistors in each amplifier channel
should be checked for damage before applying any
power.
• Amplifier current should be monitored by measuring
across the emitter resistors for each channel.
22
Opening message
When there is no history
of protection function
Version (1 alphabet)
After a few seconds
When there is a history of protection
function due to excess current
DIAG menu display
Version (1 alphabet)