Sony CX-JTV8 / JAX-TV8 Service Manual ▷ View online
CX-JTV8
17
3-16. BD BOARD
BU-30BD62 assy
1
wire (flat type) (16 core)
(CN102)
(CN102)
2
Remove two solders.
4
BD board
3
Remove two solders.
18
CX-JTV8
SECTION 4
TEST MODE
[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.
the set to the customer.
Procedure:
1. Press the
1. Press the
[POWER]
key to turn the power ON.
2. Press three keys of
x
,
[ENTER]
and
[POWER]
simultaneously.
3. The message “RESET” is displayed on the fluorescent indicator
tube momentarily, then becomes standby states.
[CD POWER MANGER CHANGE-OVER]
• This mode is used to change over video CD microprocessor ON/
OFF in the tuner mode.
Procedure:
1. Press the
1. Press the
[POWER]
key to turn the power ON.
2. Press the
[CD]
key to select “CD”.
3. Press the
[POWER]
key to turn the power OFF.
4. While pressing the
x
key, press the
[POWER]
key for 2
seconds.
5. The message “CD POW ON” or “CD POW OFF” is displayed on
the fluorescent indicator tube, and video CD microprocessor
ON/OFF is changed over.
ON/OFF is changed over.
[TUNER STEP CHANGE-OVER]
(Except Saudi Arabia model)
(Except Saudi Arabia model)
• A step of AM channels can be changed over between 9 kHz and
10 kHz.
Procedure:
1. Press the
1. Press the
[POWER]
key to turn the power ON.
2. Press the
[TUNER BAND]
key to select “AM”.
3. Press the
[POWER]
key to turn the power OFF.
4. Press two keys of
[ENTER]
and
[POWER]
simultaneously.
5. The message “AM9K STEP” or “AM10K STEP” is displayed
on the fluorescent indicator tube, and thus the channel step is
changed over.
changed over.
[CD SHIP MODE]
• This mode moves the optical pick-up to the position durable to
vibration. Use this mode when returning the set to the customer
after repair.
after repair.
Procedure:
1. Press the
1. Press the
[POWER]
key to turn the power ON.
2. Press the
[CD]
key to select “CD”.
3. Press two keys of
[CD]
and
[POWER]
simultaneously.
4. The message “LOCK” is displayed on the fluorescent indicator
tube, and the CD ship mode is set.
[CHANGE-OVER FUNCTION OF MD/VIDEO]
• This mode is used to enable function of external input to change
over between MD and VIDEO.
Procedure:
1.
1.
Press the
[POWER]
key to turn the power ON.
2.
Press two keys of
[MD VIDEO ]
and
[POWER]
simultaneously.
3.
The message “MD” or “VIDEO”is displayed on the
fluorescent indicator tube, and the function of external input
is changed over.
fluorescent indicator tube, and the function of external input
is changed over.
[VCD COLOR SYSTEM MODE]
• This mode is used to change over color system.
Procedure:
1.
Procedure:
1.
Set to the standby state.
2.
Press two keys of
m
and
[POWER]
simultaneously to change
the color system to PAL, and the message “COLOR PAL” is
displayed on the fluorescent indicator tube.
displayed on the fluorescent indicator tube.
3.
Press two keys of
X
and
[POWER]
simultaneously to change
the color system to AUTO, and the message “COLOR AUTO”
is displayed on the fluorescent indicator tube.
is displayed on the fluorescent indicator tube.
4.
Press two keys of
M
and
[POWER]
simultaneously to change
the color system to NTSC, and the message “COLOR NTSC”
is displayed on the fluorescent indicator tube.
is displayed on the fluorescent indicator tube.
[CD TRAY LOCK MODE]
• This mode is used to unable to take sample disc out of tray in
the shop.
Procedure:
1. Press the
1. Press the
[POWER]
key to turn the power ON.
2. Press the
[CD]
key to select “CD”.
3. While pressing the
x
key, press the
Z
key for 5 seconds.
4. The message “LOCKED” is displayed on the fluorescent
indicator tube and the tray is locked. (Even if pressing
the
the
Z
key, the message “LOCKED” is displayed on the
fluorescent indicator tube and the tray is locked)
5. To release from this mode, while pressing the
x
key, press
the
Z
key for 5 seconds.
6. The message “UNLOCKED” is displayed on the fluorescent
indicator tube and the tray is unlocked.
[AMP TEST MODE]
• This mode is used to set the parameter of AMP IC and EQ band
level and i-bass IC.
Procedure:
1. Press the
1. Press the
[POWER]
key to turn the power ON.
2. Press three keys of
x
,
[HIP HOP]
and
[HEAVY]
simultaneously.
3. When the AMP test mode is activated, the message “AMP
TEST” is displayed on the fluorescent indicator tube
momentarily.
momentarily.
4. Press two keys of
[HEAVY]
and
[DISC DIRECT PLAY 2]
simultaneously, mode is changed over to parameter setting
of AMP IC and EQ band level and i-bass IC.
of AMP IC and EQ band level and i-bass IC.
5. In the AMP IC setting mode, press the
[ENTER]
key, surround
ON/OFF is changed over.
6. In the EQ band level setting mode, press the
[MANUAL]
key,
EQ band is changed over to LOW, MID or HIGH.
7. In the i-bass IC setting mode, turn the
[BASS]
knob, up/down
i-bass level, press the
[i-BASS]
key, i-bass f
0
level is change
over between 1 to 3.
8. To release from this mode, press two keys of
[HEAVY]
and
[TECHNO]
simultaneously.
19
CX-JTV8
[AGING MODE]
• This mode can be used for operation check of CD section and
tape deck section.
CD section and tape deck section work in parallel.
CD section and tape deck section work in parallel.
If an error occurred:
The aging operation stops only an error occurred sections and
display then status.
display then status.
If no error occurs:
The aging operation continues repeatedly.
Procedure:
1. Press the
1. Press the
[POWER]
key to turn the power ON.
2. Press the
[CD]
key to select “CD”.
3. Set disc on the tray and set tape into the deck.
4. Set the “ALL DISCS” mode and “REV OFF” mode.
5. Press three keys of
4. Set the “ALL DISCS” mode and “REV OFF” mode.
5. Press three keys of
x
,
[HEAVY]
and
[DISC CHANGE/DISC SKIP]
simultaneously.
6. The message “AGING” is displayed on the fluorescent indicator
tube momentarily, then aging operations of CD and tape are
started at the same time.
started at the same time.
7. To release from this mode, operate the “COLD RESET”.
1. Display at the Aging Mode
Display operating state of CD section and tape deck section
alternately.
If an error occurred, stop display which that section.
alternately.
If an error occurred, stop display which that section.
2. CD Section
The sequence during the aging mode is following as below.
Display at the aging mode is the same as the normal operation.
Display at the aging mode is the same as the normal operation.
Aging mode sequence (CD section) :
Start (from disc 1)
Disc chucking
TOC read
Play first track for 2 seconds
Play last track for 2 seconds
EX-change open/close
Open the disc tray
Disc skip
Close the tray
Change the next disc.
3. Tape Deck Section
The sequence during the aging mode is following as below.
If an error occurred, stop display that step.
If an error occurred, stop display that step.
Aging mode sequence (tape deck section) :
Rewind the tape A and B
“TAPE AAG-1 or TAPE BAG-2”
Shut off
FWD play the tape A
“TAPE AAG-3”
2 minutes
Fast forward the tape A
“TAPE AAG-4”
Shut off or 20 seconds
REV play the tape A
“TAPE AAG-5”
2 minutes
Rewind the tape A
“TAPE AAG-6”
Shut off
FWD play the tape B
“TAPE BAG-3”
2 minutes
Fast forward the tape B
“TAPE BAG-4”
Shut off or 20 seconds
REV play the tape B
“TAPE BAG-5”
2 minutes
Rewind the tape B
“TAPE BAG-6”
Shut off
Note:
“TAPE
*
AG-
*
” is display of each step.
20
CX-JTV8
[GC TEST MODE]
• This mode is used to check the fluorescent indicator tube, LED
and key.
Procedure:
1. Press the
1. Press the
[POWER]
key to turn the power ON.
2. Press three keys of
x
,
[HEAVY]
and
[DISC DIRECT PLAY 2]
simultaneously.
3. Fluorescent indicator tube and LEDs are all turned ON.
4. Press two keys of
4. Press two keys of
[HEAVY]
and
[DISC DIRECT PLAY 2]
simultaneously, mode is changed over.
5. In the key check mode, press each key, the defined key number
of every each key list is displayed on the fluorescent indicator
tube.
tube.
6. In the key count check mode, “K-COUNT
0” is displayed on
the fluorescent indicator tube. Each time a key is pressed, “K”
value increases. However, once a key is pressed, it is no longer
taken into account.
value increases. However, once a key is pressed, it is no longer
taken into account.
7. In the headphone input check mode, connect the headphone,
the message “H_P ON” is displayed on the fluorescent indicator
tube, and disconnect the headphone, the message “H_P OFF”
is displayed on the fluorescent indicator tube.
tube, and disconnect the headphone, the message “H_P OFF”
is displayed on the fluorescent indicator tube.
8. In the volume check mode, turn the
[VOLUME]
knob, the
display on the fluorescent indicator tube is changed over to
“VOL UP”, “VOL FLAT” or “VOL DOWN”
“VOL UP”, “VOL FLAT” or “VOL DOWN”
[MC TEST MODE]
• This mode is used to check operations of amplifier.
Procedure:
1. Press the
Procedure:
1. Press the
[POWER]
key to turn the power ON.
2. Press three keys of
x
,
[HEAVY]
and
[DISC DIRECT PLAY 3]
simultaneously.
3. When the MC test mode is activated, VACS level is displayed
on the fluorescent indicator tube.
4. Press the
[TECHNO]
key, the display on the fluorescent
indicator tube is changed over to “ALL EQ MAX”, press the
[MANUAL]
key, the display on the fluorescent indicator tube
is changed over to “ALL EQ MID”, press the
[HIP HOP]
key, the display on the fluorescent indicator tube is changed
over to “ALL EQ MIN”,
over to “ALL EQ MIN”,
5. Turn the
[VOLUME]
knob, the display on the fluorescent
indicator tube is changed over to “VOL MAX”, “VOL MID”
or “VOL MIN”
or “VOL MIN”
6. When the
[REC PAUSE/START]
key is pressed with a tape
set in the deck-B, the function is switched “MD” or “VIDEO”
and recording starts. When the
and recording starts. When the
m
or
M
key is pressed
during recording, the tape is rewound back to the beginning of
recording, the function is switched to “TAPE B”, then playback
starts.
recording, the function is switched to “TAPE B”, then playback
starts.
7. When the
[CD SYNC]
key is pressed with the test tape (AMS-
100, AMS-110A) in the deck, number of space between tunes
is counted, then if AMS-110A is set, “OK” is displayed on the
fluorescent indicator tube and if AMS-100 is set, “NG” is
displayed on the fluorescent indicator tube.
is counted, then if AMS-110A is set, “OK” is displayed on the
fluorescent indicator tube and if AMS-100 is set, “NG” is
displayed on the fluorescent indicator tube.
8. To release from this mode, press the
[POWER]
key.
[MODEL, DESTINATION AND VERSION DISPLAY]
• This mode is used to check the model, destination and software
version.
Procedure:
1. Set to the standby state.
2. Press three keys of
1. Set to the standby state.
2. Press three keys of
x
,
[TECHNO]
and
[HEAVY]
simultaneously.
3. When the model, destination and version display mode is
activated, the model an destination is displayed on the
fluorescent indicator tube.
fluorescent indicator tube.
4. Press two keys of
[HEAVY]
and
[DISC DIRECT PLAY 2]
simultaneously, mode is changed over to model and destination
display mode and version display mode.
display mode and version display mode.
5. In the version display mode, press the
[DISC DIRECT PLAY 3]
key, display is changed over to version display and year, month
and day of the software creation display.
and day of the software creation display.
6. To release from this mode, press the two keys of
[TECHNO]
and
[HEAVY]
simultaneously.
[CD ERROR CODE DISPLAY]
• This mode can be used for error display of CD section.
Procedure:
1. Press the
Procedure:
1. Press the
[POWER]
key to turn the power ON.
2. Press the
[CD]
key to select “CD”.
3. Press three keys of
x
,
[HEAVY]
and
[DISC DIRECT PLAY 1]
simultaneously.
[CD SERVICE MODE]
• This mode can run the CD sled motor freely. Use this mode, for
instance, when cleaning the optical pick-up.
Procedure:
1. Press the
1. Press the
[POWER]
key to turn the power ON.
2. Press the
[CD]
key to select “CD”.
3. Press three keys of
x
,
[HEAVY]
and
Z
simultaneously.
4. When the CD service mode is activated, the message
“SERVICE” is displayed on the fluorescent indicator tube.
5. Press the
M
key, optical pick-up move to outside track and
the message “SLED OUT” is displayed on the fluorescent
indicator tube.
indicator tube.
6. Press the
m
key, optical pick-up move to inside track and
the message “SLED IN” is displayed on the fluorescent
indicator tube.
indicator tube.
7. Press the
[TECHNO]
key, traverse ON/OFF is changed over.
8. Press the
[HEAVY]
key, MPEG AV TEST mode is activated,
the massage “MPEG AV” is displayed on the fluorescent
indicator tube.
indicator tube.
[5 REPEAT LIMIT CANCEL]
• Number of repeat for CD playback is 5 times when the repeat
mode is “REPEAT”. This mode is used to enables CD to repeat
playback for limitless times.
playback for limitless times.
Procedure:
1. Press the
1. Press the
[POWER]
key to turn the power ON.
2. Press the
[CD]
key to select “CD”.
3. Press three keys of
x
,
[HEAVY]
and
Y
simultaneously.
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