Sony HCD-MG110 / HCD-MG310AV / MHC-MG110 / MHC-MG310AV Service Manual ▷ View online
3
HCD-MG110/MG310AV
Fig. A.
Using an AC voltmeter to check AC leakage.
1.5 k
Ω
0.15
µ
F
AC
voltmeter
(0.75 V)
voltmeter
(0.75 V)
To Exposed Metal
Parts on Set
Parts on Set
Earth Ground
SAFETY CHECK-OUT
After correcting the original service problem, perform the follow-
ing safety check before releasing the set to the customer:
Check the antenna terminals, metal trim, “metallized” knobs,
screws, and all other exposed metal parts for AC leakage.
Check leakage as described below.
ing safety check before releasing the set to the customer:
Check the antenna terminals, metal trim, “metallized” knobs,
screws, and all other exposed metal parts for AC leakage.
Check leakage as described below.
LEAKAGE TEST
The AC leakage from any exposed metal part to earth ground and
from all exposed metal parts to any exposed metal part having a
return to chassis, must not exceed 0.5 mA (500 microamperes.).
Leakage current can be measured by any one of three methods.
1. A commercial leakage tester, such as the Simpson 229 or RCA
from all exposed metal parts to any exposed metal part having a
return to chassis, must not exceed 0.5 mA (500 microamperes.).
Leakage current can be measured by any one of three methods.
1. A commercial leakage tester, such as the Simpson 229 or RCA
WT-540A. Follow the manufacturers’ instructions to use these
instruments.
instruments.
2. A battery-operated AC milliammeter. The Data Precision 245
digital multimeter is suitable for this job.
3. Measuring the voltage drop across a resistor by means of a
VOM or battery-operated AC voltmeter. The “limit” indica-
tion is 0.75 V, so analog meters must have an accurate low-
voltage scale. The Simpson 250 and Sanwa SH-63Trd are ex-
amples of a passive VOM that is suitable. Nearly all battery
operated digital multimeters that have a 2 V AC range are
suitable. (See Fig. A)
tion is 0.75 V, so analog meters must have an accurate low-
voltage scale. The Simpson 250 and Sanwa SH-63Trd are ex-
amples of a passive VOM that is suitable. Nearly all battery
operated digital multimeters that have a 2 V AC range are
suitable. (See Fig. A)
CAUTION
Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous ra-
diation exposure.
other than those specified herein may result in hazardous ra-
diation exposure.
This appliance is classified as a CLASS 1 LASER product.
The CLASS 1 LASER PRODUCT MARKING is located on
the rear exterior.
The CLASS 1 LASER PRODUCT MARKING is located on
the rear exterior.
Laser component in this product is capable of emitting radiation
exceeding the limit for Class 1.
exceeding the limit for Class 1.
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK
0
OR DOTTED
LINE WITH MARK
0
ON THE SCHEMATIC DIAGRAMS
AND IN THE PARTS LIST ARE CRITICAL TO SAFE
OPERATION. REPLACE THESE COMPONENTS WITH
SONY PARTS WHOSE PART NUMBERS APPEAR AS
SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUB-
LISHED BY SONY.
OPERATION. REPLACE THESE COMPONENTS WITH
SONY PARTS WHOSE PART NUMBERS APPEAR AS
SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUB-
LISHED BY SONY.
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.
NOTES ON HANDLING THE OPTICAL PICK-UP
BLOCK OR BASE UNIT
BLOCK OR BASE UNIT
Notes on chip component replacement
• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be dam-
• Notice that the minus side of a tantalum capacitor may be dam-
aged by heat.
Flexible Circuit Board Repairing
• Keep the temperature of the soldering iron around 270 ˚C dur-
ing repairing.
• Do not touch the soldering iron on the same conductor of the
circuit board (within 3 times).
• Be careful not to apply force on the conductor when soldering
or unsoldering.
Ver 1.1
ATTENTION AU COMPOSANT AYANT RAPPORT
À LA SÉCURITÉ!
LES COMPOSANTS IDENTIFIÉS PAR UNE MARQUE
0
SUR LES DIAGRAMMES SCHÉMATIQUES ET LA LISTE
DES PIÈCES SONT CRITIQUES POUR LA SÉCURITÉ
DE FONCTIONNEMENT. NE REMPLACER CES COM-
POSANTS QUE PAR DES PIÈCES SONY DONT LES
NUMÉROS SONT DONNÉS DANS CE MANUEL OU
DANS LES SUPPLÉMENTS PUBLIÉS PAR SONY.
DES PIÈCES SONT CRITIQUES POUR LA SÉCURITÉ
DE FONCTIONNEMENT. NE REMPLACER CES COM-
POSANTS QUE PAR DES PIÈCES SONY DONT LES
NUMÉROS SONT DONNÉS DANS CE MANUEL OU
DANS LES SUPPLÉMENTS PUBLIÉS PAR SONY.
4
HCD-MG110/MG310AV
SECTION 1
SERVICING NOTES
CD-TEXT TEST DISC
This unit is able to display the test data (character information)
written in the CD on its fluorescent indicator tube.
The CD-TEXT TEST DISC (TGCS-313:4-989-366-01) is used
for checking the display.
To check, perform the following procedure.
written in the CD on its fluorescent indicator tube.
The CD-TEXT TEST DISC (TGCS-313:4-989-366-01) is used
for checking the display.
To check, perform the following procedure.
Checking Method:
1. Press the
I/1
button to turn the power on, set the disc to the
disc table with the “test disc” label facing up, and chuck the
disc.
disc.
2. Press the
[CD]
button to set CD function, and press the
n N
button
to playback the disc.
3. The following will be displayed on the liquid crystal display.
Display : 1KHZ/0DB/L R
4. Pressing the
[-- ]
or
[ +]
button, select the track. The text
data of each track will be displayed.
For details of the displayed contents for each track, refer to “Table
1: CD-TEXT TEST DISC TEXT Data Contents”.
For details of the displayed contents for each track, refer to “Table
1: CD-TEXT TEST DISC TEXT Data Contents”.
Restrictions in CD-TEXT Display
In this unit, some special characters will not be displayed prop-
erly. These will be displayed as a space or a character resembling
it.
erly. These will be displayed as a space or a character resembling
it.
Table 1: CD-TEXT TEST DISC TEXT Data Contents
(TRACKS No. 1 to 20:Normal Characters)
1
1kHz/0dB/L&R
2
20Hz/0dB/L&R
3
40Hz/0dB/L&R
4
100Hz/0dB/L&R
5
200Hz/0dB/L&R
6
500Hz/0dB/L&R
7
1kHz/0dB/L&R
8
5kHz/0dB/L&R
9
7kHz/0dB/L&R
10
10kHz/0dB/L&R
11
16kHz/0dB/L&R
12
18kHz/0dB/L&R
13
20kHz/0dB/L&R
14
1kHz/0dB/L&R
15
1kHz/–1dB/L&R
16
1kHz/–3dB/L&R
17
1kHz/–6dB/L&R
18
1kHz/–10dB/L&R
19
1kHz/–20dB/L&R
20
1kHz/–60dB/L&R
TRACK
No.
Displayed Contents
Note:
Track No. 21 to 99 are not displayed.
.
>
CLEANING OBJECTIVE LENS OF OPTICAL PICK-UP
• In cleaning the objective lens of optical pick-up, be sure the
following below.
(Figure A)
Note 1.
In cleaning the lens, do not apply an excessive force.
As the optical pick-up is vulnerable, application of excessive
force could damage the lens holder.
As the optical pick-up is vulnerable, application of excessive
force could damage the lens holder.
Note 2.
In cleaning, do not use a cleaner other than exclusive cleaning
liquid (KK-91 or isopropyl alcohol).
liquid (KK-91 or isopropyl alcohol).
Note 3.
Wipe the objective lens spirally from center toward outside. (See
Figure A)
Figure A)
2
Remove the
magnet assy.
magnet assy.
1
Open the torsion holder
(magnet) in direction of
arrow A.
(magnet) in direction of
arrow A.
A
optical pick-up
bracket (top 60) hole
3
Put a cotton bud into
the hole on the bracket
(top 60) and clean the
OP lens.
the hole on the bracket
(top 60) and clean the
OP lens.
Ver 1.3
MODEL IDENTIFICATION
– REAR VIEW –
MODEL NO.
HCD-MG
[][][][][]
COMPACT DISC DECK RECEIVER
MADE IN CHINA
US, Canadian and Mexican models: AC: 120V 60Hz
Australian Model: AC: 220–240V-50/60Hz
Australian Model: AC: 220–240V-50/60Hz
5
HCD-MG110/MG310AV
SECTION 2
GENERAL
This section is extracted from
instruction manual.
instruction manual.
Parts Identification
5.1CH/VIDEO (MD)* 5
AUDIO IN L jack wk
AUDIO IN R jack wj
CD 5 (14, 21)
CD SYNCHRO wh
CLEAR w;
Deck A es
Deck B 0
DIRECTION ea
DISC ACCESS ql
Display window 4
DISPLAY wd
ENTER qk
FRONT* qd
GAME e;
KEYBOARD INPUT jack ws
LINK* qg
MENU ea
AUDIO IN L jack wk
AUDIO IN R jack wj
CD 5 (14, 21)
CD SYNCHRO wh
CLEAR w;
Deck A es
Deck B 0
DIRECTION ea
DISC ACCESS ql
Display window 4
DISPLAY wd
ENTER qk
FRONT* qd
GAME e;
KEYBOARD INPUT jack ws
LINK* qg
MENU ea
PHONES jack wa
PLAY MODE wf
PRESET EQ 7
PRO LOGIC* qs
PUSH OPEN (Front cover) qj
REAR* qf
REC PAUSE/START wh
REPEAT wg
STEREO/MONO wg
SURROUND* qa
SURROUND MODE 8
TAPE A/B 5
TIMER SELECT 3
TIMER SET 3
TUNER/BAND 5
VIDEO IN jack wl
VIDEO (MD)** 5
VOLUME control qh
PLAY MODE wf
PRESET EQ 7
PRO LOGIC* qs
PUSH OPEN (Front cover) qj
REAR* qf
REC PAUSE/START wh
REPEAT wg
STEREO/MONO wg
SURROUND* qa
SURROUND MODE 8
TAPE A/B 5
TIMER SELECT 3
TIMER SET 3
TUNER/BAND 5
VIDEO IN jack wl
VIDEO (MD)** 5
VOLUME control qh
Z (deck A) 1
=/1 (power) 2
m (rewind) 6
n N (play) 6
X PAUSE 6
M (fast forward) 6
x (stop) 6
– . (go back) 6
> + (go forward) 6
Z (deck B) 9
=/1 (power) 2
m (rewind) 6
n N (play) 6
X PAUSE 6
M (fast forward) 6
x (stop) 6
– . (go back) 6
> + (go forward) 6
Z (deck B) 9
* MG310AV only
** MHC-MG110 only
** MHC-MG110 only
The items are arranged in alphabetical order.
Main unit
1
es
ea
e;
wl
wk
wj
wh
wg
wf
wd
ws
wa
2 3 4
56 7 8
9
qs
w; ql
qd
0
qa
qf
qg
qh
qj
qk
6
HCD-MG110/MG310AV
Remote Control
qg
qh
ql
qk
qj
w;
1 2 3 4
wa
ws
wd
wf
6
7
8
9
5
qf
0
qd
qa
qs
5.1CH wa
CD ql
CENTER +/– 5
DBFB qd
DISPLAY 9
GAME 8
GROOVE qf
PLAY MODE 2
PRESET EQ qk
PRO LOGIC wf
REAR +/– 6
REPEAT 3
CD ql
CENTER +/– 5
DBFB qd
DISPLAY 9
GAME 8
GROOVE qf
PLAY MODE 2
PRESET EQ qk
PRO LOGIC wf
REAR +/– 6
REPEAT 3
SCROLL qa
SLEEP 1
SURROUND qh
TAPE A/B w;
TEST TONE ws
TUNER/BAND 7
VIDEO (MD) wd
VOL +/– qg
SLEEP 1
SURROUND qh
TAPE A/B w;
TEST TONE ws
TUNER/BAND 7
VIDEO (MD) wd
VOL +/– qg
@/1 (power) 4
N (play) 0
X (pause) 0
x (stop) 0
. (go back) 0
m (rewind) 0
M (fast forward) 0
>
N (play) 0
X (pause) 0
x (stop) 0
. (go back) 0
m (rewind) 0
M (fast forward) 0
>
(go forward) 0
TDISC/DISCt qs
Setting the time
Turn on the system.
Press TIMER SET.
When you set the clock for the first time, go
to step 5.
to step 5.
Press –
.
or
>
+ repeatedly to
select “CLOCK SET”.
Press ENTER.
Press –
.
or
>
+ repeatedly to set
the hour.
Press ENTER.
Press –
.
or
>
+ repeatedly to set
the minute.
Press ENTER.
If you made a mistake or want to change the time,
start over from step 1.
start over from step 1.
The clock settings are canceled when you disconnect
the power cord or if a power failure occurs.
CD wf
CLOCK/TIMER SELECT 2
CLOCK/TIMER SET 3
DBFB qg
DISPLAY wh
ENTER 5
GAME 7
GROOVE qh
PLAY MODE wg
PRESET EQ w;
REPEAT 8
CLOCK/TIMER SELECT 2
CLOCK/TIMER SET 3
DBFB qg
DISPLAY wh
ENTER 5
GAME 7
GROOVE qh
PLAY MODE wg
PRESET EQ w;
REPEAT 8
@/1 (power) 4
N (play) 0
X (pause) 0
x (stop) 0
. (go back) wa
m (rewind) ws
M (fast forward) qa
> (go forward) qs
TDISC/DISCt qf ql
N (play) 0
X (pause) 0
x (stop) 0
. (go back) wa
m (rewind) ws
M (fast forward) qa
> (go forward) qs
TDISC/DISCt qf ql
6
7
8
9
5
qf
qg
qh
0
qd
qa
qs
ql
qk
qj
w;
1 2 3 4
wa
ws
wd
wh
wg
wf
SCROLL qd
SLEEP 1
SURROUND qk
TAPE A/B wd
TUNER/BAND 9
VIDEO (MD) 6
VOL +/– qj
SLEEP 1
SURROUND qk
TAPE A/B wd
TUNER/BAND 9
VIDEO (MD) 6
VOL +/– qj
