Test Mode - Sony STR-K900 - Fm Stereo/fm-am Receiver Service Manual

STR-K880/K900
FACTORY PRESET MODE
All preset contents are reset to the default setting.
Procedure:
1. While depressing the SPEAKERS (OFF/A/B/A+B) and the
MOVIE buttons simultaneously, press the power ?/1 button
to turn on the main power.
2. The message "FACTORY" appears and the present contents
are reset to the default values. (5 second)
AM CHANNEL STEP 9 kHz/10 kHz
SELECTION MODE
Either the 9 kHz step or 10 kHz step can be selected for the AM
channel step.
Procedure:
1. Set the FUNCTION to AM. Turn off the main power.
2. While depressing the TUNING MODE button, press the
power ?/1 button to turn on the main power.
3. Either the message "9 k STEP" or "10 kSTEP" appears. Select
the desired step.
FLUORESCENT INDICATOR TUBE TEST MODE
All fluorescent segments are tested. When this test is activated, all
segments turn on at the same time, then each segment turns on one
after another.
Procedure:
1. While depressing the TUNING MODE and the DISPLAY
buttons simultaneously, press the power ?/1 button to turn
on the main power.
2. All segments turn on.
LFE SP A D D DIGITALEX D D PRO LOGIC II x DTS-ES NEO:6 MPEG-2 AAC RDS
SW
SP B SLEEP OPT COAX MULTI CH IN 96/24
L C R
SL S SR
SBL SB SBR
3. Turn the INPUT SELECTOR dial.
LFE SP A D D DIGITALEX D D PRO LOGIC II x DTS-ES NEO:6 MPEG-2 AAC RDS
SW
SP B SLEEP OPT COAX MULTI CH IN 96/24
L R
S
SB
4. Turn the INPUT SELECTOR dial once again.
SP A DIGITALEX PRO LOGIC II x DTS-ES NEO:6 MPEG-2 AAC RDS
D D D D
SP B SLEEP OPT COAX MULTI CH IN 96/24
C
SL SR
SBL SBR
5. Turn the INPUT SELECTOR dial once again. All segments
turn off.
6. Every turning of the INPUT SELECTOR dial turns on each
segment one after another in the same order.
12
SECTION 2

TEST MODE

MEMORY
D.RANGE EQ STEREO MONO
DIRECT
dB
kHz
mft.
MHz
MEMORY
D.RANGE EQ STEREO MONO
DIRECT
dB
kHz
mft.
MHz
MEMORY
D.RANGE EQ STEREO MONO
DIRECT
kHz
mft.
MHz
SOUND FIELD CLEAR MODE
The preset sound field is cleared when this mode is activated. Use
this mode before returning the product to clients upon completion
of repair.
Procedure:
1. While depressing the 2CH button, press the power ?/1
button to turn on the main power.
2. The message "SF. CLR." appears and initialization is
performed. (5 second)
SOFTWARE VERSION DISPLAY MODE
The software version is displayed.
Procedure:
1. While depressing the SPEAKERS (OFF/A/B/A+B) and the
DISPLAY buttons simultaneously, press the power ?/1
button to turn on the main power.
2. The model name, destination and the software version are
displayed. (10 second)
KEY CHECK MODE
Button check
Procedure:
1. While depressing the SPEAKERS (OFF/A/B/A+B) and the
2CH buttons simultaneously, press the power ?/1 button to
turn on the main power.
"REST 13" appears.
2. Every pressing of any button other than ?/1 counts down
the buttons. The buttons which are already counted once are
not counted again.
3. When all buttons are pressed "REST 00" appears.
CHANGE COMMON MODE
This mode is command mode changed to AV 1 or AV2.
Procedure:
1. While depressing the INPUT MODE button, press the power
?/1
button to turn on the main power.
2. Either the message "C.MODE.AV 1" or "C.MODE.AV 2"
appears. (3 second)
SHIPMENT MODE
All preset contents are reset to the default setting.
Procedure:
1. While depressing the SPEAKERS (OFF/A/B/A+B) and the
MUSIC buttons simultaneously, press the power ?/1 but-
ton to turn on the main power.
2. "CLEARED" appears and switch off the set.
PROTECTOR
Procedure:
1. While depressing the TUNING MODE and the A.F.D. but-
tons simultaneously, press the power ?/1 button to turn on
the main power.
2. " PROT. EVER" appears. (3 second)
DECODE AUTO ALL
Procedure:
1. While depressing the TUNING MODE and the MOVIE
buttons simultaneously, press the power ?/1 button to turn
on the main power.
2. "DEC. TEST" appears. (10 second)