Read Sony DHC-NXM4D / HCD-NXM4D Service Manual online
17
HCD-NXM4D
SECTION 4
TEST MODE
[Change-over of AM Tuner Step between 9 kHz and 10 kHz]
• A step of AM channels can be changed over between 9 kHz
and 10 kHz.
Procedure:
1. Press
?/1
button to turn the set ON.
2. Select the function “TUNER”, and press [TUNER/BAND]
button to select the BAND “AM”.
3. Press
?/1
button to turn the set OFF.
4. Press x button continuously, then press
?/1
button. The
set will POWER on automatically, and the display of
fluorescent indicator tube changes to “AM 9 kHz step” or “AM
10 kHz step”, and thus the channel step is changed over.
fluorescent indicator tube changes to “AM 9 kHz step” or “AM
10 kHz step”, and thus the channel step is changed over.
[Cold Reset]
• The cold reset clears all data including preset data stored in
the RAM to initial conditions. Execute this mode when
returning the set to the customer.
returning the set to the customer.
Procedure:
1. Press x button continuously, then press [DIMMER]
and
?/1
buttons.
[Switching MD/VIDEO Functions]
Procedure:
1. Press the
?/1
button to turn the set ON.
2. Press the
?/1
button while holding the VIDEO/SAT button
depressed to toggle between “SAT” and “VIDEO.” The
selected mode is displayed.
selected mode is displayed.
[Aging Mode]
This mode can be used for operation check Tape deck section.
This mode can be used for operation check Tape deck section.
• If an error occurred:
The aging operation stops and is displayed status.
• If no error occurs:
The aging operation continues repeatedly
Aging mode in Tape Deck section
Procedure:
1. Load the tapes into the decks A and B respectively.
2. Press
?/1
button on the set ON
3. Select the function “TAPE A”
4. Press x button continuously, then press X and [TAPE A/B]
buttons. and aging mode is started.
5. To exit from the aging mode perform [Cold Reset].
• In the aging mode ,the program is executed in the following
sequence.
Step
Operation
Display
1
Rewind the TAPE A
TAPE A AG-1
2
Rewind the TAPE B
TAPE B AG-1
3
Play the TAPE A (t) (2 minute)
TAPE A AG-2
4
F•F. (AMS) the TAPE A
TAPE A AG-3
5
Play the TAPE A (T) (2 minute)
TAPE A AG-4
6
Rewind the TAPE A
TAPE A AG-5
7
Play the TAPE B (t) (2 minute)
TAPE B AG-2
8
F•F.(AMS) the TAPE B
TAPE B AG-3
9
Play the TAPE B (T) (2 minute)
TAPE B AG-4
10
Rewind the TAPE B
TAPE B AG-5
[GC Test Mode]
• All fluorecent segments and LEDs are tested.
• Microprocessor virsion.
• Keyboard and jog check.
• Display check.
• Microprocessor virsion.
• Keyboard and jog check.
• Display check.
Procedure:
1. To enter the test mode, press x button coutinuously, then
press X and [TUNER/BAND] buttons.
2. All segments and LEDs (without STANDBY LED) are turned
on.
3. Press the [TUNING -] button to increment the microprocessor
software version.
4. Press the [TUNING -] button to change the indication for the
microprocessor software version.
3. Press the b B button to set the check mode for the entries
(KEY, JOG, etc.).
4. Press the X button to display the current VACS level.
7. Press the x button to enter the mode to check the display. If
you press this button repeatedly, the display will change
sequentially as the button is pressed.
sequentially as the button is pressed.
8. Press x button coutinuously, then press X and [TUNER/BAND]
buttons.
[MC Test Mode] (Amplifier SECTION)
• This mode is used to test the function of the amplifier section.
Procedure:
1. Press
?/1
button to turn the set ON.
2. To enter the test mode, press x button coutinuously, then
press X and z START buttons.
3. Turn [VOLUME] knob to counter-clockwise, the function of
the equalizer is set to “MIN”.
4. Turn [VOLUME] knob to clockwise, the function of the
equalizer is set to “MAX”.
5. Whenever turn [SOUND MODE] knob to clockwise, the display
switches as follows.
“TONE MAX” t“TONE MIN” t“TONE FLAT”
6. Press [DSGX] button to select DBFB ON or OFF.
7. To exit from this mode, press
?/1
button to turn the set
OFF.
8. Press
?/1
button to turn the set ON.
9. To enter the test mode, press x button coutinuously, then
press X and z START buttons.
10. Select SOUND FIELD mode by turn the SOUND MODE
knob.
11. Change the speaker output by turn the SOUND SELECT knob.
[MC Test Mode] (Tape section)
• This mode is used to test the functions of the Tape Section.
Procedure:
1. Press
?/1
button to turn the set ON.
2. To enter the test mode, press x button coutinuously, then
press X and z START buttons.
3. While holding the [DIMMER] button depressed, turn the ALC
ON.
4. Press the z START button to start REC (recording).
5. While recording, press the [TUNING +] button to perform
5. While recording, press the [TUNING +] button to perform
automatic rewind and automatic playback (for FF version).
Also, press the [TUNING -] button to perform automatic rewind
and automatic playback (for FR version).
Also, press the [TUNING -] button to perform automatic rewind
and automatic playback (for FR version).
6. Select the function “TAPE A” or “TAPE B”
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