DOWNLOAD Sony CX-JT7 / JAX-PK7 / JAX-T7 Service Manual ↓ Size: 9.47 MB | Pages: 90 in PDF or view online for FREE

Model
CX-JT7 JAX-PK7 JAX-T7
Pages
90
Size
9.47 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio
File
cx-jt7-jax-pk7-jax-t7.pdf
Date

Sony CX-JT7 / JAX-PK7 / JAX-T7 Service Manual ▷ View online

CX-JT7
17
1
Remove two
solders.
qa
BD board
2
two screws
(P2 
×
 3)
6
claw
7
gear (A)
8
gear (B)
5
wire (flat type) (16 core)
(CN708)
0
motor gear assy (SLED)
(M701)
3
screw (P2.6 
×
 6)
9
Remove two solders.
4
2
sled shaft
1
Slide the lever
in the direction of arrow 
A
.
3
Remove the optical pick-up
(KSS-213D) in the direction
of arrow 
B
.
A
B
3-16. MOTOR  GEAR  ASSY (SLED) (M701),  BD  BOARD
3-17. OPTICAL  PICK-UP (KSS-213D)
18
CX-JT7
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.
Procedure:
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.
[TUNER STEP CHANGE-OVER]
(Except AEP, UK and CIS models)
• A step of AM channels can be changed over between 9 kHz and
10 kHz.
Procedure:
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 “9K STEP” or “10K STEP” is displayed on the
fluorescent indicator tube, and thus the channel step is 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.
Procedure:
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.
Set to standby state.
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.
[CD TRAY LOCK MODE]
• This mode is used to unable to take sample disc out of tray in
the shop.
Procedure:
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
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 for adjustment
of tone quality and VACS level and display VACS status.
Procedure:
1. Press the 
[POWER]
 key to turn the power ON.
2. Press three keys of
x
[HEAVY]
 and 
[HIP POP]
 simultaneously.
3. When the AMP test mode is activated, the message “AMP
TEST” is displayed on the fluorescent indicator tube
momentarily.
4. Press two keys of 
[HEAVY]
 and 
[DISC DIRECT PLAY 2]
simultaneously, mode is changed over to parameter setting of
AMP IC and display of VACS status.
5. When the VACS ON, the message “V2255255” is displayed on
the fluorescent indicator tube, and when the VACS OFF, the
message “2255255” is displayed on the fluorescent indicator
tube.
6. Press the 
[VOCAL]
 key, DBFB ON/OFF is changed over.
7. Press the 
[ENTER]
 key, surround ON/OFF is changed over.
8. Press the 
[MANUAL]
 key, EQ band is changed over to LOW,
MID or HIGH.
9. Press the 
[HIP POP]
 and 
[TECHNO]
 key, EQ curve adjustment
value is changed over between –8dB to +8dB.
10. To release from this mode, press two keys of 
[HEAVY]
  and
[TECHNO]
 simultaneously.
19
CX-JT7
[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.
If an error occurred:
The aging operation stops only an error occurred sections and
display then status.
If no error occurs:
The aging operation continues repeatedly.
Procedure:
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
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.
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.
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.
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.
Aging mode sequence (tape deck section) :
Rewind the tape A and B
“AAG-1 or 2”
Shut off
FWD play the tape A
“AAG-3”
2 minutes
Fast forward the tape A
“AAG-4”
Shut off or 20 seconds
REV play the tape A
“AAG-5”
2 minutes
Rewind the tape A
“AAG-6”
Shut off
FWD play the tape B
“BAG-3”
2 minutes
Fast forward the tape B
“BAG-4”
Shut off or 20 seconds
REV play the tape B
“BAG-5”
2 minutes
Rewind the tape B
“BAG-6”
Shut off
Note:
 “
*
AG-
*
” is display of each step.
20
CX-JT7
[GC TEST  MODE]
• This mode is used to check the fluorescent indicator tube, LED
and key.
Procedure:
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 
[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.
6. In the key count check mode, “K-CNT 
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.
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.
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”
[MC TEST  MODE]
• This mode is used to check operations of Amplifier.
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, the message “MC MODE”
is displayed on the fluorescent indicator tube momentarily, then
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 “EQ MAX”, press the
[MANUAL]
 key, the display on the fluorescent indicator tube is
changed over to “EQ MID”, press the 
[HIP POP]
  key, the
display on the fluorescent indicator tube is changed over to “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”
6. Press the 
[ENTER]
 key, VACS ON/OFF is changed over.
7. 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
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.
8. 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.
9. 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
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.
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.
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.
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 
[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.
Note:
Error code is not displayed on the liquid crystal display.
[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 
[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 “TRVS
ON” 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.
6. Press the
m
key,  optical pick-up move to inside track and
the message “SLED IN” is displayed on the fluorescent indicator
tube..
7. Press the 
[TECHNO]
 key, traverse ON/OFF is changed over.
[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.
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
Y
simultaneously.
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