DAV-HDX275, DAV-HDX277WC, DAV-HDX279W, DAV-HDX475, DAVHDX576WF, DAV-HDX675, HCD-HDX275, HCD-HDX277WC, HCD-HDX279W, HCD-HDX475, HCD-HDX576WF, HCD-HDX675 - Sony Audio Service Manual (repair manual). Page 24

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HCD-HDX275/HDX277WC/HDX279W/HDX475/HDX576WF/HDX675
24

AUTOMATIC  ACOUSTIC  FIELD  CALIBRATION  MICRO-
PHONE  TEST  MODE
Procedure:
1.  Press the [
?
/
1
] button to turn the power on.
2.  Insert ECM-AC2 supplied as an accessory into the AUDIO IN/
A.CAL MIC jack.
3.  While pressing the [
S
] and [
A
] buttons simultaneously, turn 
the [VOLUME] dial in the direction of (+).
4. Confi rm that the following are shown on the display panel.
1
  The JACK inserted/non-inserted detection display and the 
STEREO/MONO detection display.
2
  Presence of DIGITAL voice input to the microcomputer.
    (OK: input, NG: no input)
3
  The value of the MIC input to the microcomputer. (shouwn 
“255h”)
* * * 
* * 
* * *
  1 2 3
1
  “NON” : Not detected
   “ST”  : STEREO
   “MN”  : MIN
2
 OK : input
   NG : no input
3
  0-255 (Changes in real time)
5.  To exit this mode, press two buttons [
S
] and [
A
] simultane-
ously, turn the [VOLUME] dial in the direction of (+).

DEMO  PLAY  OUT
It is a mode to release the demonstration reproduct by the dedi-
cated demonstration disc.
Procedure:
1.  During playback the DEMO disc, press the [
s
] and [
H
] but-
tons for fi ve seconds simultaneously.
2.  The message “DEMO OFF” is displayed, a mode to reproduct 
the demonstration is released.

VOLUME  TEST  MODE
Procedure:
1.  Press the [
?
/
1
] button to turn the power on.
2.  Press three buttons [
l
], [
H
] and [
L
] simultaneously.
3.  The message “VOLUME MAX” is displayed, when the [VOL-
UME] dial is turned in the direction of (+).
 
The message “VOLUME MIN” is displayed, when the [VOL-
UME] dial is turned in the direction of (–).
4.  To exit from this mode, press the [
?
/
1
] button to turn the set 
off.

PROTECTION  FACTOR (SD  DETECTION/DC  DETEC-
TION) IDENTIFICATION  TEST  MODE
When an error is detected, the fl orescent indicator tube alternately 
displays 
“PROTECTOR” h “PUSH POWER”.
  Press 
the 
[
?
/
1
] button.
    * Buttons other than the [
?
/
1
] button are invalid.
“STANDBY” blinks three times on the fl orescent indicator tube.
The protection release state (POWER OFF) is established.
(No fl orescent indicator tube display)
  Press 
the 
[
?
/
1
] button twice.
The power to the system turns on, and the normal operation is es-
tablished. (Restore)

During the protection state: 
1.  If the AC plug is connected or disconnected during the protec-
tion state, the protection state is released, and the normal op-
eration is established. (The protection state is not maintained)
2.  The protection factor is displayed by pressing the [FUNC-
TION], [
A
] and [
L
] buttons at the same time during the 
protection state. (during the “PROTECTOR” h “PUSH 
POWER” display)
      When SD is detected: Repeats
   “SD 
DETECT” 
h “PROTECTOR”.
      When DC is detected: Repeats
   “DC 
DETECT” 
h “PROTECTOR”.

SD detection:
 
When the “L” output from the SD (shutdown) port on the 
S-MASTER POWER Driver Shutdown and voltage descent 
(15V or less) of 30V power supply (PVDD) are detected.

DC detection:
 
When the “L” output from the power/speaker error detection 
circuit (DC detection port) is detected for two seconds continu-
ally, the power system other than that of the fl orescent indica-
tor tube is turned off, and the protection state is established.
Ver. 1.1

Display

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