Sony CX-JN77 / JAX-N77 / JAX-PK77 Service Manual ▷ View online
4
CX-JN77
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R
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– Rear View –
PART No.
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.
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MODEL IDENTIFICATION
MODEL
PART No.
AEP, UK models
4-253-949-0
[]
CIS model
4-253-950-0
[]
Chilean and Peruvian models
4-253-951-0
[]
Mexican model
4-255-500-0
[]
5
CX-JN77
SERVICE POSITION
– CD MECHANISM DECK –
– CD MECHANISM DECK –
HOW TO OPEN THE DISC TRAY WHEN POWER SWITCH TURNS OFF.
1
Remove the case (side-L).
2
Turn the loading gear in the direction
of arrow
of arrow
A
.
A
3
Pull-out the disc tray.
CD mechanism deck
stand
CDMP3 CONNECT board
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CX-JN77
– AMP BOARD –
– FRONT PANEL SECTION –
MAIN board
PANEL board
front panel section
tape mechanism deck
SUB TRANS board
TRANS board
AMP board
MAIN board
front panel section
7
CX-JN77
Main unit
ALBUM + wl
ALBUM – wl
BASS control 5
CD qh
CD SYNC qs
Deck A 9
Deck B wk
DISC 1 – 3 wd
DISC SKIP/EX-CHANGE wf
Disc tray ws
DISPLAY qg
Display window 4
ENTER 2
i-Bass qd
MIDDLE control 5
ALBUM – wl
BASS control 5
CD qh
CD SYNC qs
Deck A 9
Deck B wk
DISC 1 – 3 wd
DISC SKIP/EX-CHANGE wf
Disc tray ws
DISPLAY qg
Display window 4
ENTER 2
i-Bass qd
MIDDLE control 5
Operation Dial
(AMS/TUNING) qf
P FILE 6
PHONES jack qa
PLAY MODE w;
PRESET EQ 3
REC PAUSE/START 8
Remote sensor 7
SURROUND wa
TAPE A/B qk
TREBLE control 5
TUNER/BAND qj
TUNING MODE w;
VIDEO/MD ql
VOLUME control wh
PHONES jack qa
PLAY MODE w;
PRESET EQ 3
REC PAUSE/START 8
Remote sensor 7
SURROUND wa
TAPE A/B qk
TREBLE control 5
TUNER/BAND qj
TUNING MODE w;
VIDEO/MD ql
VOLUME control wh
?/1 (power) 1
Z PUSH (deck A) (eject) 0
Z (eject) wg
PUSH Z (deck B) (eject) wj
m (rewind) wl
x (stop) wl
hH (play) wl
X (pause) wl
M (fast forward) wl
Z PUSH (deck A) (eject) 0
Z (eject) wg
PUSH Z (deck B) (eject) wj
m (rewind) wl
x (stop) wl
hH (play) wl
X (pause) wl
M (fast forward) wl
ALPHABETICAL ORDER
A – N
O – Z
BUTTON DESCRIPTIONS
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Z
Z
wd
wf
wg
wh
wk
4
qj
qh
qk qlw;waws
wj
1
qg
qf
qd
qs
0
qa
9
2
wl
8
3
5
6 7
SECTION 2
GENERAL
This section is extracted from
instruction manual.
instruction manual.
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LOCATION OF CONTROLS
