Sony CX-JTV8 / JAX-TV8 Service Manual ▷ View online
4
CX-JTV8
SECTION 1
SERVICING NOTES
NOTES ON HANDLING THE OPTICAL PICK-UP
BLOCK OR BASE UNIT
BLOCK OR BASE UNIT
The laser diode in the optical pick-up block may suffer electro-
static break-down because of the potential difference generated
by the charged electrostatic load, etc. on clothing and the human
body.
During repair, pay attention to electrostatic break-down and also
use the procedure in the printed matter which is included in the
repair parts.
The flexible board is easily damaged and should be handled with
care.
static break-down because of the potential difference generated
by the charged electrostatic load, etc. on clothing and the human
body.
During repair, pay attention to electrostatic break-down and also
use the procedure in the printed matter which is included in the
repair parts.
The flexible board is easily damaged and should be handled with
care.
NOTES ON LASER DIODE EMISSION CHECK
The laser beam on this model is concentrated so as to be focused
on the disc reflective surface by the objective lens in the optical
pick-up block. Therefore, when checking the laser diode emis-
sion, observe from more than 30 cm away from the objective lens.
on the disc reflective surface by the objective lens in the optical
pick-up block. Therefore, when checking the laser diode emis-
sion, observe from more than 30 cm away from the objective lens.
LASER DIODE AND FOCUS SEARCH OPERATION
CHECK
CHECK
Carry out the “S curve check” in “CD section adjustment” and
check that the S curve waveforms is output three times.
check that the S curve waveforms is output three times.
• MODEL IDENTIFICATION
– Back Panel –
– Back Panel –
MODEL
PART No.
Singapore and Malaysia models
4-247-552-0
[]
Saudi Arabia model
4-249-062-0
[]
E model
4-250-476-0
[]
PART No.
UNLEADED SOLDER
Boards requiring use of unleaded solder are printed with the lead-
free mark (LF) indicating the solder contains no lead.
(Caution: Some printed circuit boards may not come printed with
free mark (LF) indicating the solder contains no lead.
(Caution: Some printed circuit boards may not come printed with
the lead free mark due to their particular size)
: LEAD FREE MARK
Unleaded solder has the following characteristics.
• Unleaded solder melts at a temperature about 40 ˚C higher than
• Unleaded solder melts at a temperature about 40 ˚C higher than
ordinary solder.
Ordinary soldering irons can be used but the iron tip has to be
applied to the solder joint for a slightly longer time.
Soldering irons using a temperature regulator should be set to
about 350 ˚C.
Caution: The printed pattern (copper foil) may peel away if the
Ordinary soldering irons can be used but the iron tip has to be
applied to the solder joint for a slightly longer time.
Soldering irons using a temperature regulator should be set to
about 350 ˚C.
Caution: The printed pattern (copper foil) may peel away if the
heated tip is applied for too long, so be careful!
• Strong viscosity
Unleaded solder is more viscou-s (sticky, less prone to flow)
than ordinary solder so use caution not to let solder bridges oc-
cur such as on IC pins, etc.
than ordinary solder so use caution not to let solder bridges oc-
cur such as on IC pins, etc.
• Usable with ordinary solder
It is best to use only unleaded solder but unleaded solder may
also be added to ordinary solder.
also be added to ordinary solder.
RELEASING THE DISC TRAY LOCK
The disc tray lock function for the antitheft of an demonstration
disc in the store is equipped.
disc in the store is equipped.
Releasing Procedure :
While pressing the
While pressing the
x
key, press the
Z
key for 5 seconds. The
message “UNLOCKED” is displayed and the tray is unlocked.
Note:
When “LOCKED” is displayed, the tray lock is not released by
turning power on/off with the
turning power on/off with the
[POWER]
key.
Ver 1.2
5
CX-JTV8
HOW TO OPEN THE DISC TRAY WHEN POWER SWITCH TURNS OFF.
2
Turn the loading gear
in the direction of arrow
in the direction of arrow
A
.
1
Remove the case (side-L).
A
3
Pull-out the disc tray.
6
CX-JTV8
SERVICE POSITION
– CD mechanism deck –
– CD mechanism deck –
– Tape mechanism deck –
main board (CN312)
Connect wire (flat type) (19 core) to
main board (CN312) and VMP42DN board (CN201).
main board (CN312) and VMP42DN board (CN201).
VMP42DN board (CN201)
Connect wire (flat type) (13 core) to
panel board (CN601) and mechanical deck.
panel board (CN601) and mechanical deck.
panel board (CN601)
main board (CN203)
7
CX-JTV8
SECTION 2
GENERAL
This section is extracted from
instruction manual.
instruction manual.
• LOCATION OF CONTROLS
GB
1 DISC CHANGE/DISC SKIP
Rotates the CD trays.
2 POWER 6STANDBY/ON
Switches the unit on and off (standby).
The red indicator flashes when receiving a signal from
the remote.
The red indicator flashes when receiving a signal from
the remote.
3 TAPE A/B
Selects Tape function, and deck A or B.
TUNER BAND
Selects Tuner function and the radio band.
MD (VIDEO)
Selects the function of external equipment connected to
MD (VIDEO) jacks.
MD (VIDEO) jacks.
CD
Selects CD function.
4 TREBLE/MIDDLE
Enhances high or middle frequency sound.
5 CD SYNC
Starts Automatic CD dubbing.
REC PAUSE/START
Starts recording.
6 PHONES jack
Plug in here an optional headphones set with a mini
stereo plug (ø3.5 mm). Speaker output is canceled.
stereo plug (ø3.5 mm). Speaker output is canceled.
MIC jack
Connects the microphone here.
MIC MIXING
Adjusts the microphone volume.
Main unit: front
Refer to the pages indicated in parentheses for details.
7 DISC DIRECT PLAY 1-3
Selects a disc.
8 zOPEN/CLOSE
Opens or closes the disc compartment.
9 HEAVY, VOCAL, SALSA, TECHNO,
HIP HOP, MANUAL
Activates a graphic equalization curve.
0 MODE
Selects various modes (Play mode and Tape reverse, etc.)
when used in combination with ENTER and MULTI JOG.
when used in combination with ENTER and MULTI JOG.
ENTER
Fixes the modes and the time (Play mode and Tape
reverse, etc.) when used in combination with MODE and
MULTI JOG.
reverse, etc.) when used in combination with MODE and
MULTI JOG.
! MULTI JOG
CD: skips to a previous or a succeeding track.
Tuner: selects a preset station.
Clock and Timer: sets the time.
Selects the mode and the time when used in combination
with MODE and ENTER.
Tuner: selects a preset station.
Clock and Timer: sets the time.
Selects the mode and the time when used in combination
with MODE and ENTER.
@ VOLUME
Adjusts the volume.
# BASS
Adjusts low frequency sound.
SURROUND
Switches surround on and off.
i-Bass
Produces rich and clear low frequency sound.
$ DISPLAY
Displays the time and the remaining time for CD.
When the unit is off, press DISPLAY to switch between
DEMO, Clock and ECO display modes.
When the unit is off, press DISPLAY to switch between
DEMO, Clock and ECO display modes.
ALBUM -, +
Selects a previous album or a succeeding album with
MP3-CDs.
MP3-CDs.
% TUNING DOWN, TUNING UP (f , g)
CD: searches a track in fast forward or fast reverse
playback.
Tape: fast forwards or rewinds the tape.
Tuner: manually tunes down or up within the band.
playback.
Tape: fast forwards or rewinds the tape.
Tuner: manually tunes down or up within the band.
a
PAUSE
CD and Tapes: pauses playback.
d
DIRECTION
CD and Tapes: starts playback.
s
STOP
CD and Tapes: stops playback.
Main unit: rear
Refer to the pages indicated in parentheses for details.
1 AM LOOP, FM 75 Ω terminals
Plug in the supplied AM and FM antennas here.
2 MD (VIDEO) IN jacks
Accepts analog sound signals from external equipment.
Connect using an optional connecting cord with RCA
phono plugs (red plug to R jack, white plug to L jack).
Refer also to the operating instructions of your equipment.
To switch function to external input, press MD (VIDEO).
Connect using an optional connecting cord with RCA
phono plugs (red plug to R jack, white plug to L jack).
Refer also to the operating instructions of your equipment.
To switch function to external input, press MD (VIDEO).
Tip:
To change the displayed name for this function, turn the
unit on, then hold down MD (VIDEO) and press POWER
on the unit. Repeat the procedure to select “MD” or
“VIDEO”.
unit on, then hold down MD (VIDEO) and press POWER
on the unit. Repeat the procedure to select “MD” or
“VIDEO”.
3 MD (VIDEO) OUT jacks
Outputs the analog sound signals of CD, TAPE, and
TUNER to external audio equipment.
Connect using an optional connecting cord with RCA
phono plugs (red plug to R jack, white plug to L jack).
Refer also to the operating instructions of your equipment.
TUNER to external audio equipment.
Connect using an optional connecting cord with RCA
phono plugs (red plug to R jack, white plug to L jack).
Refer also to the operating instructions of your equipment.
4 SURROUND SPEAKER terminals
Connect for each speaker the blue cord to the 0 terminal
and the black cord to the 9 terminal.
and the black cord to the 9 terminal.
FRONT SPEAKER terminals
Connect for each speaker the red cord to the 0 terminal
and the black cord to the 9 terminal.
and the black cord to the 9 terminal.
5 AC power cord
6 VIDEO OUT jack
6 VIDEO OUT jack
Outputs video signals. Connect to the video input jack
of your TV set with the supplied video cord.
Select the appropriate video input on your TV. Refer to
the operating instructions of your TV.
of your TV set with the supplied video cord.
Select the appropriate video input on your TV. Refer to
the operating instructions of your TV.
7 AC VOLTAGE selector
Switches AC voltage according to your local voltage.
Make sure it matches your local voltage.
Make sure it matches your local voltage.
Ver 1.2
