Test Mode - Sony CMT-GPX6 Service Manual

[MC COLD RESET]
The cold reset clears all data including preset data stored in the
memory to initial conditions. Execute this mode when returning
the set to the customer.
Procedure:
1. In the standby status, press the
on.
2. Press three buttons of
I/1
neously.
3. The set is reset, and become standby status.
[COMMON TEST MODE]
Enter The Common Test Mode
Procedure:
1. In the standby status, press the
on.
[REPEAT]
2. Press three buttons of
simultaneously.
3. When the common test mode is activated, "SLEEP" and
"PLAY" icons are blink on the fluorescent indicator tube.
AMP Test
Procedure:
1. In the common test mode, if turn the
wise, it displays "VOL MAX", and if turn the knob counter-
clockwise, it displays "VOL MIN".
[TREBLE]
2. If the knobs are turned clockwise or counterclock-
wise, it displays "TONE FLAT".
[BASS]
3. If the knobs are turned clockwise, it displays "TONE
MAX", and if turn the knob counterclockwise, it displays
"TONE MIN".
4. To release from this mode, disconnect the AC plug to turn the
power off.
Tape Test
Procedure:
1. In the common test mode, insert a tape.
2. Input any audio signal from the
the MAIN board.
[ REC]
3. Press the z button, and press the
to select the tape direction.
[ REC]
4. Press the z button again to start recording.
5. If press the m (TAPE) or
returned to recording start point by cue or review operation,
and starts playback.
6. To release from this mode, disconnect the AC plug to turn the
power off.
SECTION 4

TEST MODE

button to turn the power
I/1
[DSGX]
, (CD), and simulta-
x
button to turn the power
I/1
[DSGX]
, x (TAPE), and
[VOLUME]
knob clock-
[VIDEO/MD]
jack (J301) on
[ TAPE]
nN button
M (TAPE) button, the tape is
[PANEL TEST MODE]
Enter The Panel Test Mode
Procedure:
1. In the standby status, press the
on.
[PLAY MODE]
2. Press three buttons of
simultaneously.
3. When the panel test mode is activated, LEDs and segments of
fluorescent indicator tube are all turned on.
Version Check
Procedure:
1. In the panel test mode (all LEDs and segments of fluorescent
indicator tube are turned on), press the
ton.
2. Destination indication and model type indication are displayed
on the fluorescent indicator tube alternately.
3. From this status, each time the
pressed, it changes the version display of each module cycli-
cally as follows.
Display Module
MC Main controller
GC Display
CD CD system
CDD CD device master
CDMA CDM upper module
CDMB CDM lower module
BDA BD upper module
BDB BD lower module
ST Tuner
TA Amplifier
TM Timer
TC Tape
4. To date of any module, press the
5. To release from this mode, press three buttons of
MODE]
, (TAPE), and
x
Key Check
Procedure:
1. In the panel test mode (all LEDs and segments of fluorescent
indicator tube are turned on), press the
2. It displays "K 0 J0 V0" on the fluorescent indicator tube.
3. Each time a button is pressed, "K" value increases. However,
once a button is pressed, it is no longer taken into account.
All keys are pressed, display becomes "K26".
4. "V" value increases like 1, 2, 3 ... if turn the
clockwise, or it decreases like 0, 9, 8 ... if turn the knob coun-
terclockwise.
"J" value increases like 1, 2, 3 ... if turn the
[TREBLE]
knob clockwise, or it decreases like 0, 9, 8 ... if
turn the knob counterclockwise.
5. To release from this mode, press three buttons of
MODE]
, x (TAPE), and
HCD-GPX6/GPX7
button to turn the power
I/1
[DSGX]
, (TAPE), and
x
[TUNING MODE]
[TUNING MODE]
button is
[DSGX]
button.
[PLAY
[DSGX]
simultaneously.
[PLAY MODE]
button.
[VOLUME]
[BASS]
[PLAY
[DSGX]
simultaneously.
but-
knob
or
19