Test Mode - Sony STR-DH550 Service Manual

STR-DH550/DH750
TUNER AM STEP CHANGE MODE
(US and Canadian models only)
Either the 9 kHz step or 10 kHz step can be selected for the AM
channel step.
Procedure:
1. Press the [ ] button to turn on the main power.
?/1
2. Turn the [INPUT SELECTOR] knob to select the "AM TUNER".
3. Press the [?/1] button to turn off the main power.
4. While pressing the [TUNING MODE] button, press the [?/1]
button to turn on the main power.
5. Either the message "10K Step" or "9K Step" appears.
6. Repeat step (4) to select desired step.
VACUUM FLOURESCENT DISPLAY TEST MODE
All fl ourescent segments are tested.
When this test is activated, all segments light on at the same time,
then each segment lights on one after another.
Procedure:
While pressing [SPEAKERS] and [DIMMER] buttons simultane-
ously, press the [ / ] button to turn on the main power.
? 1
1. ALL segments light on.
USB ARC MEM D.R.C. True HD
OPT BT
COAX
HDMI
SP A B
2. Press the [DISPLAY] button to confi rm display as below.
USB ARC MEM D.R.C. True HD
OPT BT
COAX
HDMI
SP A B
3. Press the [DISPLAY] button to confi rm display as below.
USB ARC MEM D.R.C. True HD
OPT BT
COAX
HDMI
SP A B
4. Press the [DISPLAY] button, all segments light off.
SOUND FIELD CLEAR MODE
The preset sound fi eld is cleared when this mode is activated.
Use this mode before returning the product to clients upon com-
pletion of repair.
Procedure:
1. While pressing [MUSIC] button, press the [
turn on the main power.
2. The message "S.F. CLEAR" appears for a moment and
initialization is performed.
SOFTWARE VERSION DISPLAY MODE
The software version is displayed.
Procedure:
1. While pressing [A.F.D./2CH] and [PURE DIRECT] buttons
simultaneously, press the [
power.
2. The message "H55 XXX" or "H75 XXX" appears.
XXX: Area display
Each time the [DISPLAY] button is pressed, "SYS. vX.XX",
"MAIN vX.XX", "VIDEO vX.XX", "OSD vX.XX" and
"SFLASHvX.XX" appear in this order, and returns to the
"H55 XXX" or "H75 XXX" display.
X.XX: Software version
10
SECTION 3

TEST MODE

PL EQ DTS-HD ST D.C.A.C. SLEEP
PL EQ DTS-HD ST D.C.A.C. SLEEP
k
PL EQ DTS-HD ST D.C.A.C. SLEEP
dB
MHz
k Hz
] button to
?/1
/ ] button to turn on the main
? 1
KEY CHECK MODE
Each button can be checked.
Procedure:
1. While pressing [SPEAKERS] and [PURE DIRECT] buttons
simultaneously, press the [
power.
2. The message "REST 12" appears.
Every pressing of any button other than the [
down the buttons.
3. The buttons which are already counted once are not counted
again.
4. When all buttons are pressed, "REST 00" appears.
SWAP ALL MODE
The signal will be swap to all channels so that all speakers will
have sound output.
Procedure:
1. While pressing [PURE DIRECT] and [MOVIE] buttons
simultaneously, press the [
power.
2. "SWAP MODE" appears.
INITIALIZE MODE
All preset contents are cleared when this mode is activated. Use
this mode before returning the product to clients upon completion
of repair.
(a) SHIPMENT MODE
Procedure:
1. While pressing [A.F.D./2CH] and [DIMMER] buttons
simultaneously, press the [
power.
2. The message "CLEARING" appears and the memories are
reset to the default values.
3. When done, the message "CLEARED *" appears, the set will
power off.
(b) ALL CLEAR INITIALIZE
Procedure:
1. While pressing [A.F.D./2CH] and [DISPLAY] buttons, press
the [ / ] button to turn on the main power.
? 1
2. The message "CLEARING" appears and the memories are
reset to the default values.
3. When done, the message "CLEARED *" appears, the set will
power on.
(c) USER INITIALIZE
Procedure:
1. Hold the [ / ] button for 5 seconds.
? 1
2. The message "CLEARING" appears on the display.
3. After few seconds, "CLEARED *" appears.
PROTECTOR AUTO OFF
To disable auto off after protector occur.
Procedure:
1. While pressing [DISPLAY] and [MOVIE] buttons simultane-
ously, press the [ / ] button to turn on the main power.
? 1
2. "PROTEVER" appears and switch on the set.
DCAC TEST MODE
To test audio output from mic input and speakers.
Procedure:
1. While pressing [MUSIC] and [DIMMER] buttons simultane-
ously, press the [ / ] button to turn on the main power.
? 1
2. The message "MIC" appears.
MIC: mode that output audio from mic input
] button to turn on the main
?/1
] counts
?/1
/ ] button to turn on the main
? 1
/ ] button to turn on the main
? 1