Display Check; Manual Test - Yamaha RX-V795a Service Manual

(6) DISPLAY CHECK

Check program for FL display. The display status will change as follows with submenu operation. The signal is
processed with EFFECT OFF.
For switching between internal and external sync commanded by the microprocessor, the forced external sync is
selected. (Remote control code 7A-56 : DSP/16)
All segments are turned on and off to detect defects in the FL driver (IC102) and FL display segments. Then the FL
driver operation is checked by the dimmer control.
Finally, all segments are turned on and off alternately (in lattice form), to check for a short-circuit between adjacent
segments.

(7) MANUAL TEST

The noise generator built into the DSP outputs test noise from the channel specified by the submenu.
7.TEST ALL
7.TEST MAIN R
7.TEST LFE
(8) FACTORY PRESET
The initialization of the backup RAM, which contains DSP sound field parameters, set menu contents, etc. is reserved or
inhibited. The signal is processed with EFFECT OFF.
8. PRESET INHI
8. PRESET RSRVD
CAUTION : Before setting to the PRESET RESERVED, write down the existing preset memory content of the Tuner in a
table as shown below. (This is because setting to the PRESET RESERVED will cause the user memory
content to be erased.)
Preset group
A
B
C
D
E
7.TEST MAIN L
7.TEST REAR R
Inhibits initialization of the RAM. Specify this option to protect
user set values.
Reserve to initialize the backup RAM. (The RAM is actually ini-
tialized when power is turned on next time.) Specify this option at
the factory or to reset the RAM. For each initial value, see page
20.
P1 P2 P3
7.TEST CENTER
7.TEST REAR L
P4 P5 P6
RX-V795a/RDS/HTR-5170
P7 P8
16