Test Mode - Sony HCD-GSX75 Service Manual

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[Panel Test Mode]
Procedure:
1. Press three buttons of
neously.
2. LEDs and fluorescent indicator tube are all turned on.
[MENU]
3. Press the
Press the m button and go to the key and jog test mode.
4. To release from these mode, press three buttons in the same
manner as step 1, or disconnect the power cord.
– Version display mode –
In the version display mode, each time the
pressed, the display changes in the order of MC, GC, CD, CDD,
CDM A, CDM B, BDA, BDB, ST, TA, TM and TC.
Press the . button to display the date of the software.
– Key and jog test mode –
In the key check mode, the fluorescent indicator tube displays
"K 0 J0 V0". Each time a button is pressed, "K" value in-
creases without
a button is pressed, it is no longer taken into account.
"J" value increases like 1, 2, 3 ... if turn the
dial clockwise, or it decreases like 0, 9, 8 ... if turn the
[DISC SELECT]
"V" value increases like 1, 2, 3 ... if turn the
clockwise, or it decreases like 0, 9, 8 ... if turn the
knob counterclockwise.
[Cold Reset]
• The cold reset clears all data including preset data stored in the
RAM to initial conditions. Execute this mode when returning
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the set to the customer.
Procedure:
1. Turn the power ON or set to the DEMO mode.
2. Press three buttons of
taneously.
3. The set is reset, and becomes DEMO mode.
[CD Ship Mode and RAM Initialize]
• This mode moves the optical pick-up to the position durable to
vibration, and initializes the RAM. Use this mode when return-
ing the set to the customer after repair.
Procedure:
1. Press the button to turn the power ON and select the func-
I/1
tion CD.
2. Press three buttons of
taneously.
3. The set is turn the power off and initializes the RAM auto-
matically. A message "LOCK" is displayed on the fluorescent
indicator tube, and the CD delivery mode is set.
[AM Channel Step 9 kHz/10 kHz Selection Mode]
• The AM tuning interval can be changed over 9 kHz or 10 kHz.
Procedure:
1. Press the I/1 button to turn the power on.
2. Select the function "TUNER", and press the
button to select the BAND "AM".
3. Press the I/1 button to turn the power off.
[ENTER]
4. Press the
www
5. Either the message "AM 9k STEP" or "AM 10k STEP" ap-
pears, and thus the channel step is changed over.
.
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[MENU] [DISPLAY]
x , , and
button and go to the version display mode.
[MENU]
[DISPLAY]
I/1 and buttons. However, once
[DISC SELECT]
dial counterclockwise.
[VOLUME]
[CLEAR] [DISPLAY]
, , and
x
[ENTER] [REPEAT]
, , and
[TUNER/BAND]
and I/1 buttons simultaneously.
x ao
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SECTION 4

TEST MODE

8
[CD Service Mode]
• This mode can run the CD sled motor optionally. Use this mode,
simulta- for instance, when cleaning the optical pick-up.
Procedure:
1. Press the
2. Select the function "CD".
3. Press three buttons of
[PLAY MODE]
4. Set to the Sled Servo mode.
5. With the CD in stop status, press the
optical pick-up to outside track and display "SLED OUT", or
button is press the
track and display "SLED IN".
6. To exit from this mode, perform as follows.
1) Move the optical pick-up to the most inside track.
2) Press three buttons of
simultaneously. (cold reset)
Notes: • Always move the optical pick-up to most inside track when
exiting from this mode. Otherwise, a disc will not be unloaded.
• Do not run the sled motor excessively, otherwise the gear can
be chipped.
[VACS Test Mode]
• This mode is used to switch on and off the VACS (Variable At-
tenuation Control System).
knob
Procedure:
[VOLUME]
1. Press the
2. To enter the test mode, press the two buttons
MODE]
and
3. The message "VACS OFF" or "VACS ON" appears.
4. To exit from this mode, press the
Q Q
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[Function Selection Mode]
• This mode is used to select the input VIDEO or input MD.
simul-
Procedure:
1. Turn off the set.
2. Press the two buttons
3. The message "VIDEO" or "MD" appears.
4. To exit from this mode, press the
off.
simul-
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2 9 9 4 2 8
I/1 button to turn the power ON.
[ENTER]
, M , and
simultaneously.
M
button to move the optical pick-up to inside
m
[CLEAR]
,
x
I/1 button to turn the set on.
simultaneously.
X
I/1
1 5 0 5 8 2 9 9 4
and [VIDEO $MD%] simultaneously.
x
I/1
m
co
HCD-GSX75
9 9
button to move the
[DISPLAY]
, and
[ENTER] [PLAY
,
button to turn the set
2 8 9 9
button to turn the set
17