Display Check; Manual Test - Yamaha RX-V1200 Service Manual

9. DISPLAY CHECK

This program is used to check the FL display section. The display condition varies as shown below according to the sub-
menu operation. The signals are processed using EFFECT OFF (The L/R signal is output using ANALOG MAIN
BYPASS.)
The video signal internal/external synchronization switching is controlled by the microprocessor. When the initial
message is displayed and all the FL segments light up, it is switched to the internal synchronization but other than that it
is forced to the external synchronization setting.
Also, except for the initial display, 128 pictographs for checking the OSD driver are used for the video signal output
display.
Initial display
Segment conditions of the FL driver and the FL tube are checked by turning ON and OFF all segments. Next, the
operation of the FL driver is checked by using the dimmer control. Then a short between segments next to each other is
checked by turning ON and OFF all segments alternately (in lattice). (In the above example, the segments in the second
row from the top are shorted.)

10. MANUAL TEST

The noise generator with a built-in DSP outputs the test noise through the channels specified by the sub-menu.
The noise frequency for LFE is 35 to 250 Hz. Other than that, the center frequency is 800Hz.
TEST ALL
Noise is output from all channels.
TEST MAIN R
Noise is output from the MAIN R channel.
TEST REAR L
Noise is output from the REAR L
channel.
All segments OFF
Lighting of segments
Lighting in lattice
in lattice
Short Normal
TEST MAIN L
Noise is output from the MAIN L channel.
TEST REAR R
Noise is output from the REAR R channel.
TEST LFE
Noise is output from the SUB WOOFER
channel.
RX-V1200/RX-V1200RDS/HTR-5490/RX-V2200
All segments ON (dimmer 100%)
All segments ON (dimmer 50%)
TEST CENTER
Noise is output from the CENTER
channel.
TEST REAR CENTER
Noise is output from the REAR C
channel.
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