Sony CMT-EP303 / HCD-EP303 Service Manual ▷ View online
4
HCD-EP303
SECTION 1
SERVICING NOTES
• MODEL IDENTIFICATION
– Bottom View –
– Bottom View –
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 electrostatic
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.
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 emission,
observe from more than 30 cm away from the objective lens.
the disc reflective surface by the objective lens in the optical pick-
up block. Therefore, when checking the laser diode emission,
observe from more than 30 cm away from the objective lens.
LASER DIODE AND FOCUS SEARCH OPERATION
CHECK
CHECK
1.
Press the ?/1 button to the power ON with no disc inserted
and press the CD button.
and press the CD button.
2.
Open the lid for CD.
3.
Turn on SW600 as following figure.
4.
Confirm the laser diode emission while observing the objecting
lens. When there is no emission, Auto Power Control circuit or
Optical Pick-up is broken.
Objective lens moves up and down five times for the focus
search.
lens. When there is no emission, Auto Power Control circuit or
Optical Pick-up is broken.
Objective lens moves up and down five times for the focus
search.
SW600
PART No.
at least 30 mm.
CASSETTE board
MAIN board
HEADPHONE
board
board
at least 30 mm
heatsink
MODEL
PART No.
AEP, UK models
4-235-972-0
<
EXCEPT AEP, UK models
4-241-498-0
<
TO PREVENT ‘TAPE OSCILLATION SOUND AT VOLUME’
MAXIMUM SETTING (W/O TAPE)
MAXIMUM SETTING (W/O TAPE)
Headphone wire dressing:
a.) Draw the wire from Main board to Headphone board along the
a.) Draw the wire from Main board to Headphone board along the
bottom side of heatsink.
b.) The wire must be kept away from the top side of Cassette board
5
HCD-EP303
SECTION 2
GENERAL
This section is extracted
from instruction manual.
from instruction manual.
Main unit
R – Z
Remote sensor q;
REPEAT
REPEAT
(8)
SHUFFLE
(8)
TAPE
(12)
TIMER indicator
(15)
TUNER
(10, 11, 13)
TUNER MEM
(10)
TUNING +/–
(10, 11)
VOLUME control
ALPHABETICAL ORDER
A – P
Cassette compartment qd (12)
CD 4 (8, 9, 13)
Display Window 5 8, 9, 10)
ENTER/PGM
CD 4 (8, 9, 13)
Display Window 5 8, 9, 10)
ENTER/PGM
8, 9, 10, 14)
MEGA BASS
(14)
MUSIC MENU 9 (14)
PHONES jack
PRESET +/–
PHONES jack
PRESET +/–
(10, 11)
BUTTON DESCRIPTIONS
@/1 (power)
(6)
CD
.m /M> (go back/go
forward)
(8, 9)
u (play/pause)
(8, 9)
Z PUSH OPEN/CLOSE
(8)
x (stop)
(8)
TAPE
M (fast forward)
(12)
X (pause)
(12, 13)
N (play)
(12)
z (recording)
(13)
m (rewind)
(12)
xZ (stop/eject)
(12, 13)
w;
8
ws
qs
2
wa
3
1
6
w;
wd
qa
wh
wd
wf
7
wg
qh
qf
qk
ql
qj
qg
6
HCD-EP303
Setting the clock
1
Turn on the system.
2
Press CLOCK/TIMER/SLEEP SET on
the remote.
the remote.
3
Press CLOCK/TIMER + or – on the
remote repeatedly to set the clock.
remote repeatedly to set the clock.
4
Press TUNER MEM/ENTER/PGM on the
remote.
remote.
The clock starts working.
To adjust the clock
Perform from step 2.
Note
The clock settings are canceled when you disconnect
the power cord or if a power failure occurs.
the power cord or if a power failure occurs.
Remote control
ALPHABETICAL ORDER
A – P
CD/REMAIN
(7, 8, 9, 13, 15,
16)
CLOCK/TIMER +
(7, 14, 15)
CLOCK/TIMER –
(7, 14, 15)
CLOCK/TIMER/SLEEP SET
(7, 14, 15)
MEGA BASS
(14)
MUSIC MENU
(14)
MUTING
(14)
PRESET +/–
(10, 11)
R – Z
REPEAT
(8)
SHUFFLE
(8)
TAPE
(12)
TIMER ON/OFF
(15)
TUNER/BAND
(10, 11, 13)
TUNER MEM/ENTER/PGM
(7, 9, 10, 14, 15)
TUNING +
(10, 11)
TUNING –
(10, 11)
VOL (volume) +/–
BUTTON DESCRIPTIONS
m (rewind) M (fast forward)
qg (8)
. (go back) > (go forward)
qg (8, 9)
u (play/pause) qh (8, 9)
@/1 (power) 3 (6)
x (stop) qj (8, 9, 12)
@/1 (power) 3 (6)
x (stop) qj (8, 9, 12)
ql
8
qd
1
qs
qa
q;
qf
6
5
qk
2
4
8
qd
9
7
7
HCD-EP303
SECTION 3
DISASSEMBLY
•
The equipment can be removed using the following procedure.
3-6. CD CABINET SECTION
(Page 10)
3-5. DISPLAY BOARD,
HEADPHONE BOARD
HEADPHONE BOARD
(Page 9)
3-1. FRONT PANEL SECTION
(Page 7)
3-3. TAPE MECHANISM DECK
(TCM125-2)
(Page 8)
(Page 8)
3-7. CD MECHANISM DECK
(CS-21SC-1280)
(Page 10)
(Page 10)
3-8. CASSETE LID
(Page 11)
3-2. MAIN BOARD
(Page 8)
3-4. POWER BOARD,
POWER TRANSFORMER
POWER TRANSFORMER
(Page 9)
SET
3-1. Front Panel Section
8
connector
(CN203)
(CN203)
5
two screws
(+K3
(+K3
×
5)
3
two screws
(+BTP2.6
(+BTP2.6
×
10)
1
screw
(+BVTP3
(+BVTP3
×
10)
4
two screws
(+BVTP3
(+BVTP3
×
10)
5
two screws
(+K3
(+K3
×
5)
5
two screws
(+K3
(+K3
×
5)
9
connector
(CN402)
(CN402)
0
connector
(SW600)
(SW600)
qa
front panel section
7
2
antenna cover cabinet
6
claw
Note :
Follow the disassembly procedure in the numerical order given.
