Sony HCD-MG110 User manual

SERVICE MANUAL
HC D-MG310AV only
This stereo system is equipped with the Dolby* Pro Logic
Surround decoder.
* Manufactured under license from Dolby Laboratories.
Dolby, Pro Logic, and the double-D symbol ;are
trademarks of Dolby Laboratories. Confidential
unpublished works. '1992-1997 Dolby Laboratories.
All rights reserved.
Amplifier section
AUDIO POWER SPECIFICATIONS
POWER OUTPUT AND TOTAL
HARMONIC DISTORTION:
with 8 ohm loads both channels driven, from
100 – 10,000 Hz; rated 75 watts per channel
minimum RMS power, with no more than 10%
total harmonic distortion from 250 milliwatts to
rated output.
HCD-MG310AV
Front speaker:
Continuous RMS power output
75 + 75 watts
(8 ohms at 1 kHz,
10% THD)
Total harmonic distortion less than 0.09%
(8 ohms at 1 kHz,
40 watts)
Center speaker:
Continuous RMS power output
25 watts
(8 ohms at 1 kHz,
10% THD)
Rear speaker:
Continuous RMS power output
25 + 25 watts
(8 ohms at 1 kHz,
10% THD
)
HCD-MG110
Continuous RMS power output
75 + 75 watts
(8 ohms at 1 kHz,
10% THD)
Total harmonic distortion less than 0.09%
(8 ohms at 1 kHz,
40 watts)
Inputs
VIDEO/MD IN (phono jacks):
voltage 250 mV/450 mV,
impedance 47 kilohms
5.1CH (HCD-MG310AV only):
FRONT (phono jacks): voltage 450 mV,
impedance 47 kilohms
REAR (phono jacks): voltage 450 mV,
impedance 47 kilohms
CENTER (phono jack): voltage 450 mV,
impedance 47 kilohms
SUB WOOFER (phono jack):
voltage 450 mV,
impedance 47 kilohms
Outputs
PHONES (stereo phone jack):
accepts headphones of
8 ohms or more
FRONT SPEAKER: accepts impedance of 8 to
16 ohms (except for the
North American model)
SURROUND SPEAKER REAR (HCD-MG310AV
only): accepts impedance of 8 to
16 ohms (except for the
North American model)
SURROUND SPEAKER CENTER
(HCD-MG310AV only): accepts impedance of
8 ohms (except for the
North American model)
SUB WOOFER (HCD-MG310AV only):
voltage 1 V,
impedance 1 kilohm
CD player section
System Compact disc and digital
audio system
Laser Semiconductor laser
(λ= 780 nm)
Emission duration:
continuous
Frequency response 2 Hz – 20 kHz (±0.5 dB)
Wavelength 780 – 790 nm
Signal-to-noise ratio More than 90 dB
Dynamic range More than 90 dB
OPTICAL OUT (CD)
(Square optical connector jack, rear panel)
Wavelength 660 nm
Output Level –18 dBm
US Model
HCD-MG110/MG310AV
Ver 1.0 2001.03
9-873-801-11 Sony Corporation
2001C0500-1 Audio Entertainment Group
C2001.3 General Engineering Dept.
COMPACT DISC DECK RECEIVER
SPECIFICATIONS
HCD-MG110/MG310AV aretheAmplifier, CD player,Tape
Deck and Tuner section in MHC-MG110/MG310AV.
– Continued on next page –
Model Name Using Similar Mechanism NEW
CD CD Mechanism Type CDM64-K1BD44A
Section Base Unit Name BU-K1BD44A
Optical Pick-up Name KSM-213BFN
TAPE Model Name Using Similar Mechanism NEW
Section Tape Transport Mechanism Type CM8L6Z511A
Photo: HCD-MG110

2
HCD-MG110/MG310AV
TABLE OF CONTENTS
Tape player section
Recording system 4-track 2-channel stereo
Frequency response 40 –13,000 Hz (±3 dB),
using Sony TYPE I
cassette
Tuner section
FM stereo, FM/AM superheterodyne tuner
FM tuner section
Tuning range 87.5 –108.0 MHz
Antenna FM lead antenna
Antenna terminals
North American model: 75 ohms unbalanced
Australian model: 75 ohms balanced
Intermediate frequency 10.7 MHz
AM tuner section
Tuning range 530 –1,710 kHz
(with the interval set at
10 kHz)
531 –1,710 kHz
(with the interval set at
9 kHz)
Antenna AM loop antenna
Antenna terminals External antenna terminal
Intermediate frequency 450 kHz
General
Power requirements 120 V AC, 60 Hz
Power consumption
HCD-MG310AV: 200 watts
HCD-MG110: 150 watts
Dimensions (w/h/d) incl. projecting parts and controls
Approx. 280 ×383 ×480
mm
Mass
HCD-MG310AV: Approx. 11.3 kg
HCD-MG110: Approx. 10.9 kg
Design and specifications are subject to change
without notice.
1. SERVICING NOTE.................................................. 4
2. GENERAL ................................................................... 5
3. DISASSEMBLY
3-1. Disassembly Flow ........................................................... 7
3-2. Upper Cover .................................................................... 8
3-3. Front Block Assy............................................................. 8
3-4. MAIN Board ................................................................... 9
3-5. Back Panel....................................................................... 9
3-6. “MAIN AMP Board”, “POWER Board”........................ 10
3-7. “Middle (F) Assy”, “Bracket (Middle-R)”,
“Power Bracket”.............................................................. 10
3-8. Mechanism Deck (CDM64-K1BD44A)......................... 11
3-9. Base Unit (BU-K1BD44A)............................................. 11
3-10. BU Holder Assy .............................................................. 12
3-11. “Motor Gear Assy (Sled) (M102)”, “CD Board”........... 12
3-12. Op Base Assy (KSM-213BFN) ...................................... 13
3-13. Cassette Lid Assy (A)/(B)............................................... 13
3-14. Mech Deck ...................................................................... 14
4. MECHANICAL ADJUSTMENTS....................... 15
5. DIAGRAMS
5-1. Block Diagram –CD SERVO Section –........................ 17
5-2. Block Diagram –TUNER/TAPE DECK Section –...... 18
5-3. Block Diagram –SURROUND Section –...................... 19
5-4. Block Diagram –AMP Section –................................... 20
5-5. Block Diagram
–DISPLAY/POWER SUPPLY Section –...................... 21
5-6. Note for Printed Wiring Boards and
Schematic Diagrams ....................................................... 22
5-7. Schematic Diagram –CD Section –............................... 24
5-8. Printed Wiring Board –CD Section –............................ 25
5-9. Printed Wiring Boards
–CD MOTOR/SENSOR Section –................................ 26
5-10. Schematic Diagram
–CD MOTOR/SENSOR Section –................................ 27
5-11. Printed Wiring Board –TC Section –............................. 28
5-12. Schematic Diagram –TC Section –............................... 29
5-13. Schematic Diagram –MAIN Section (1/4) –................. 30
5-14. Schematic Diagram –MAIN Section (2/4) –................. 31
5-15. Schematic Diagram –MAIN Section (3/4) –................. 32
5-16. Schematic Diagram –MAIN Section (4/4) –................. 33
5-17. Printed Wiring Board –MAIN Section –....................... 34
5-18. Printed Wiring Boards –AMP Section –........................ 36
5-19. Schematic Diagram –AMP Section –............................ 37
5-20. Printed Wiring Boards –DISPLAY Section –............... 38
5-21. Schematic Diagram –DISPLAY Section –.................... 39
5-22. Printed Wiring Board –CONTROL Section –............... 40
5-23. Schematic Diagram –CONTROL Section –.................. 41
5-24. Printed Wiring Boards –POWER Section –.................. 42
5-25. Schematic Diagram –POWER Section –...................... 43
5-26. IC Pin Function Description ........................................... 44
6. EXPLODED VIEWS
6-1. General Section ............................................................... 50
6-2. Front Panel Section ......................................................... 51
6-3. Chassis Section ............................................................... 52
6-4. Mechanism Deck Section (CDM64-K1BD44A) ........... 53
6-5. Base Unit Section (BU-K1BD44A) ............................... 54
7. ELECTRICAL PARTS LIST ............................... 55

3
HCD-MG110/MG310AV
Fig. A. Using an AC voltmeter to check AC leakage.
1.5 k Ω 0.15 µ FAC
voltmete
r
(0.75 V)
To Exposed Metal
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.
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
WT-540A. Follow the manufacturers’instructions to use these
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)
CAUTION
Use of controls or adjustments or performance of procedures
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.
Laser component in this product is capable of emitting radiation
exceeding the limit for Class 1.
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK 0OR DOTTED
LINE WITH MARK 0ON 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.
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.
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.
LASER DIODE AND FOCUS SEARCH OPERATION
CHECK
Carry out the “S curve check”in “CD section adjustment”and
check that the S curve waveforms is output three times.
NOTES ON HANDLING THE OPTICAL PICK-UP
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-
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.

4
HCD-MG110/MG310AV SECTION 1
SERVICING NOTE
CD-TEXTTEST 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.
Checking Method:
1. Press the I/1button to turn the power on, set the disc to the disc table with the “test disc”label facing up, and chuck the 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”.
Restrictions in CD-TEXT Display
In this unit, some special characters will not be displayed properly. These will be displayed as a space or a character resembling it.
Table 1 : CD-TEXTTEST DISCTEXT 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.
.>

5
HCD-MG110/MG310AV
SECTION 2
GENERAL This section is extracted from
instruction manual.
4
Parts Identification
5.1CH/VIDEO (MD)* 5(28)
AUDIO IN L jack wk (29)
AUDIO IN R jack wj (29)
CD 5(14, 21)
CD SYNCHRO wh (21, 22)
CLEAR w; (15, 19, 34)
Deck A es (20)
Deck B 0(20)
DIRECTION ea (20)
DISC ACCESS ql (12, 21)
Display window 4
DISPLAY wd (12, 17, 19, 34)
ENTER qk (11, 15, 18, 22, 26, 28)
FRONT* qd (25)
GAME e; (26, 29)
KEYBOARD INPUT jack ws
(27)
LINK* qg (25)
MENU ea (16, 18)
PHONES jack wa
PLAY MODE wf (14, 22)
PRESET EQ 7(24)
PRO LOGIC* qs (11, 25)
PUSH OPEN (Front cover) qj
(12)
REAR* qf (25)
REC PAUSE/START wh (21,22)
REPEAT wg (14)
STEREO/MONO wg (19)
SURROUND* qa (25)
SURROUND MODE 8(25)
TAPE A/B 5(20)
TIMER SELECT 3(23, 27)
TIMER SET 3(11, 23, 26)
TUNER/BAND 5(18)
VIDEO IN jack wl (29)
VIDEO (MD)** 5(28)
VOLUME control qh
BUTTON DESCRIPTIONS
Z(deck A) 1
=/1 (power) 2
m(rewind) 6
nN(play) 6
XPAUSE 6
M(fast forward) 6
x(stop) 6
—.(go back) 6
>+ (go forward) 6
Z(deck B) 9
* HCD-MG310AV only
** HCD-MG110 only
The items are arranged in alphabetical order.
Refer to the pages indicated in parentheses ( ) for details.
Main unit
1
es
ea
e;
wl
wk
wj
wh
wg
wf
wd
ws
wa
234 567 8 9
qs
w; ql
qd
0
qa
qf
qg
qh
qj
qk

6
HCD-MG110/MG310AV
Setting the time
1Turn on the system.
2Press TIMER SET.
When you set the clock for the first time, go
to step 5.
3Press — .or > + repeatedly to
select CLOCK SET.
4Press ENTER.
5Press — .or > + repeatedly to set
the hour.
6Press ENTER.
7Press — .or > + repeatedly to set
the minute.
8Press ENTER.
Tip
If you made a mistake or want to change the time,
start over from step 1.
Note
The clock settings are canceled when you disconnect
the power cord or if a power failure occurs.
Remote Control
For HCD-MG310AV
qg
qh
ql
qk
qj
w;
1234
wa
ws
wd
wf
6
7
8
9
5
qf
0
qd
qa
qs
5.1CH wa (30)
CD ql (14, 21)
CENTER +/–5(11)
DBFB qd (24)
DISPLAY 9(12, 17, 19)
GAME 8(26, 29)
GROOVE qf (24)
PLAY MODE 2(14, 22)
PRESET EQ qk (24)
PRO LOGIC wf (11, 25)
REAR +/–6(11)
REPEAT 3(14)
SCROLL qa (17)
SLEEP 1(26)
SURROUND qh (25)
TAPE A/B w; (20)
TEST TONE ws (11)
TUNER/BAND 7(18)
VIDEO (MD) wd (28)
VOL +/–qg
BUTTON DESCRIPTIONS
@/1 (power) 4
N(play) 0
X(pause) 0
x(stop) 0
.(go back) 0
m(rewind) 0
M(fast forward) 0
>(go forward) 0
TDISC/DISCtqs qj
CD wf (14, 21)
CLOCK/TIMER SELECT 2
(23, 27)
CLOCK/TIMER SET 3(23, 26)
DBFB qg (24)
DISPLAY wh (12, 17, 19)
ENTER 5(11, 15, 18, 22, 26,
28, 34)
GAME 7(26, 29)
GROOVE qh (24)
PLAY MODE wg (14, 22)
PRESET EQ w; (24)
REPEAT 8(14)
BUTTON DESCRIPTIONS
@/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/DISCtqf ql
For HCD-MG110
6
7
8
9
5
qf
qg
qh
0
qd
qa
qs
ql
qk
qj
w;
1234
wa
ws
wd
wh
wg
wf
SCROLL qd (17)
SLEEP 1(26)
SURROUND qk (25)
TAPE A/B wd (20)
TUNER/BAND 9(18)
VIDEO (MD) 6(28)
VOL +/–qj

HCD-MG110/MG310AV
7
•This set can be disassembled in the order shown below.
3-1. DISASSEMBLY FLOW
SECTION 3
DISASSEMBLY
3-2. UPPER COVER
(Page 8)
3-3. FRONT BLOCK ASSY
(Page 8)
3-4. MAIN BOARD
(Page 9)
3-5. BACK PANEL
(Page 9)
3-6. "MAIN AMP BOARD",
"POWER BOARD"
(Page 10)
3-13. CASSETTE LID ASSY (A)/(B)
(Page 13)
SET
3-10. BU HOLDER ASSY
(Page 12)
3-12. OP BASE ASSY
(KSM-213BFN)
(Page 13)
3-11. "MOTOR GEAR ASSY
(SLED) (M102)"
"CD BOARD"
(Page 12)
3-14. MECH DECK
(Page 14)
3-7. "MIDDLE (F) ASSY",
"BRACKET (MIDDLE-R)",
"POWER BRACKET"
(Page 10)
3-8. MECHANISM DECK
(CDM64-K1BD44A)
(Page 11)
3-9. BASE UNIT
(BU-K1BD44A)
(Page 11)

HCD-MG110/MG310AV
8
3-3. FRONT BLOCK ASSY
Note: Follow the disassembly procedure in the numerical order given.
3-2. UPPER COVER
1 three screws
(BVTP3
× 8)
2 five screws
(BVTP3
× 8)
2 two screws
(BVTP3
× 8)
3 upper cover
1 three screws
(BVTP3
× 8)
5 two bosses
4 screw (KTP3 × 8)
3 three screws
(BVTP3
× 8)
4 screw (KTP3 × 8)
6 front block assy
5 two bosses
2 three connectors
(CN310, 503, 803)
1 three wires (flat type)
(CN301, 311, 312)

HCD-MG110/MG310AV
9
3-4. MAIN BOARD
3-5. BACK PANEL
1 wire (flat type)
(CN309)
4 screw
(BVTP3
× 8)
5 MAIN board
1 wire (flat type)
(CN303)
3 three screws
(BVTP3
× 8)
3 three screws
(BVTP3
× 8)
3 screw (BVTP3 × 8)
3 screw
(BVTP3
× 8)
MG310AV
MG310AV
MG110
2 three connectors
(CN304, 314, 903)
2 three connectors
(CN305, 306, 307)
2 back panel
1 two screws
(BVTP3
× 10)
1 two screws
(BVTP3
× 10)
1 eleven screw
s
(BVTP3 × 10)
MG310AV

HCD-MG110/MG310AV
10
3-6. “MAIN AMP BOARD”, “POWER BOARD”
3-7. “MIDDLE (F) ASSY”, “BRACKET (MIDDLE-R)”, “POWER BRACKET”
5 center bracket
4 three screws
(BVTP3
× 8)
2 two screws
(BVTP3
× 8)
1 connector
(CN502)
3 MAIN AMP board
7 POWER board
6 two screws
(BVTP4
× 8
)
6 two screws
(BVTP4
× 8)
2 four screws
(BVTP3
× 8)
3 middle (F) assy
1 screw (BVTP3 × 8)
2 screw (BVTP3 × 8)
4 three screws
(BVTP3 × 8)
6 bracket (middle-R)
5 two screws
(BVTP3 × 8)
9 two screws
(BVTP3 × 8)
7 screw
(BVTP3 × 8)
2 screw
(BVTP3 × 8)
0 power bracket
8 three screws
(BVTP3 × 8)

HCD-MG110/MG310AV
11
3-8. MECHANISM DECK
(CDM64-K1BD44A)
3-9. BASE UNIT
(BU-K1BD44A)
2 table (60)
lower chassis
1 screw (2.6 × 8)
5 mechanism deck
(CDM64-K1BD44A)
4 two screws
(BVTP3
× 8
)
3 screw
(PSW3
× 6)
4 four screws
(BVTP3
× 8)
4 four screws
(BVTP3
× 8)
1 three screws
(BVTP3
× 8)
2 bracket (top 60)
3 base unit
(BU-K1BD44A)

HCD-MG110/MG310AV
12
3-10. BU HOLDER ASSY
3-11. “MOTOR GEAR ASSY (SLED) (M102)”, “CD BOARD”
4 BU holder assy
1 tension spring (F1)
2 tension spring (F-2)
3 two screws
(PTP2.6
× 8
)
3 two screws
(PTP2.6
× 8)
1 Remove two
solders.
qd CD board
2 two screws
(P2
× 3)
6 claw
8 claw
8 two claws
9 gear cover
7 gear
0 gear
5 parallel (FFC) (16 core) wire
(CN102)
qs motor gear assy (SLED)
(M102)
3 screw (P2 × 5)
qa Remove two solders.
4

HCD-MG110/MG310AV
13
3-12. OP BASE ASSY
(KSM-213BFN)
3-13. CASSETTE LID ASSY (A) / (B)
2 sled shaft
1 Slide the lever
in the direction of arrow
A .
3 Remove the optical pick-up
(KSM-213BFN) in the directio
n
of arrow B .
A
B
5 cassette li
d
assy (B)
3 cassette lid
assy (A)
2 two claws
4 two claws
1 Open the cassette lid
assy (A)/(B).

HCD-MG110/MG310AV
14
3-14. MECH DECK
4 cassette holder assy (A)
0 two screws
(BVTP2.6)
1 three screws
(BVTP3
× 10)
qs mech deck
qa MD bracket
2 two screws
(BVTP3 × 10
)
9 TC board
8 screw (BVTP2.6)
6 two screws
(BVTP2.6)
7 shield plate (MD)
5 cassette
holder
assy (B)
3

15
HCD-MG110/MG310AV
SECTION 4
MECHANICAL ADJUSTMENTS
•TAPE MECHANISM DECK SECTION
Precaution
1. Clean the following parts with a denatured alcohol-moistened
swab:
record/playback heads pinch rollers
erase head rubber belts
capstan idlers
2. Demagnetize the record/playback head with a head demagne-
tizer.
3. Do not use a magnetized screwdriver for the adjustments.
4. After the adjustments, apply suitable locking compound to the
parts adjusted.
5. The adjustments should be performed with the rated power
supply voltage unless otherwise noted.
Torque Measurement
2.94 mN •m to 7.84 mN •m
31 to 71 g •cm
(0.43 –0.98 oz •inch)
0.14 mN •m to 0.59 mN •m
2 to 6 g •cm
(0.02 –0.08 oz •inch)
2.94 mN •m to 7.84 mN •m
31 to 71 g •cm
(0.43 –0.98 oz •inch)
0.14 mN •m to 0.59 mN •m
2 to 6 g •cm
(0.02 –0.08 oz •inch)
6.86 mN •m to 17.64 mN •m
71 to 143 g •cm
(0.98 –1.99 oz •inch)
more than 0.98 N •m
100 g or more
(3.53 oz or more)
more than 0.98 N •m
100 g or more
(3.53 oz or more)
Mode Torque meter
CQ-102C
CQ-102C
CQ-102RC
CQ-102RC
CQ-201B
CQ-403A
CQ-403R
Meter reading
FWD
FWD
back tension
REV
REV
back tension
FF/REW
FWD tension
REV tension

16
HCD-MG110/MG310AV
MEMO

HCD-MG110/MG310AV
1717
SQSO SQCK
A/D
CONVERTER
CH1OUTF
CH1OUTR
6
7
8
9
16
18
11
10
12
2
1
51
49
48
43
24
41
40 39
64 15
28
29
30
31
32
33
24
25
23
5
6
2
3
17
18
15
16
E
B
C
D
A
CD +5V
F
DETECTOR
A
B
C
D
RF
SUMMING
AMP
FOCUS
ERROR AMP
TRACKING
ERROR AMP
RFAC
FE
RF AMP,
FOCUS/TRACKING ERROR AMP
IC103
TE
E
FF I-V AMP
E I-V AMP
AUTOMATIC
POWER
CONTROL
Q101
APC LD
AMP
LD
LD
PD
LASER DIODE
RFAC
ASYO
ASYI
ASYMMETRY
CORRECTION
DIGITAL
PLL
DIGITAL SIGNAL PROCESSOR,
DIGITAL FILTER, D/A CONVERTER
IC101 (1/2)
DATA
XLAT
CLOK
14 5 6
MDP
26 7 8
XLON
3
XRST
DIGITAL
CLV
D/A
INTERFACE
SE
TE
FE
RFDC
FOCUS/TRACKING/SLED
SERVO DSP
FOCUS/TRACKING/SLED
PWM GENERATOR
SFDR
CH3FIN
CH4SIN
CH3RIN
CH3OUTF
CH3OUTR
CH2FIN
CH2RIN
CH1FIN
CH1RIN
20
MUTE
SRDR
TFDR
TRDR
FFDR
FRDR
S101
(LIMIT)
EMPH
WFCK GFS
MIRR/DFCT/
FOK
DETECTOR
SERVO AUTO
SEQUENCER
SERVO
INTERFACE
CPU INTERFACE
18
63
62
61
19
SENS
20
86
87
85
84 19
SCOR
C-SQSO
C-SQCK
C-LATCH
C-CLK
C-DATA
C-SENS
C-SCOR
1 2
32 33
SCLK
COUT
9 21
SSTP
27
FOK
22
23
MIRR
DFCT
TO SERVO INTERFACE
CH4OUTF
CH4OUTR
M101
(SPINDLE)
MOTOR
DRIVE
MOTOR
DRIVE
CH2OUTF
CH2OUTR
M
M
M102
(SLED)
FOCUS/TRACKING COIL DRIVE,
SPINDLE/SLED MOTOR DRIVE
IC102
2-AXIS
DEVICE
(TRACKING)
(FOCUS)
DIGITAL SERVO
PROCESSOR
IC101 (2/2)
OPTICAL PICK-UP
BLOCK
(KSM-213BFN)
SW
PD
I-V AMP
12
11
13
14
54 56 53 55
FILTER
FILO
PCO
CLTV
FILI
EFM
DEMODULATOR
SERIAL
IN
INTERFACE
DIGITAL
FILTER,
NOISE SHAPER
PWM
&
INTEGRATOR
BUFFER
CLOCK
GENERATOR
TIMING
LOGIC
DIGITAL
OUT
INTERNAL BUS
16K
RAM
ERROR
CORRECTOR
SUBCODE
PROCESSOR
60
83 C-XRST
XTAI
X101
16.9344MHz
AIN1
AIN2
AOUT1
AOUT2
TO MIRR/DFCT/
FOK DETECTOR
PCMD
BCK
LRCK
C2PO
DOUT
66
XTAO 67
70
77
LOUT1
LOUT2 R-CH
72
75
71
76
When the optical pick-up
is inner position
ON :
A(Page 19)
EQ
IN 15
3
4EQ
AC
SUM
17
FEI
RF DC
AMP 28
RFDCO
29
RFDCI
COIL
DRIVE
COIL
DRIVE
26
24
22
PWM3
PWM2
PWM1
PWM1
PWM3
PWM2
PWM3
PWM2
PWM1
88 LD ON
LEVEL
SHIFT
IC803
91
18
93
T-SENS3
T-SENS2
T-SENS1 TABLE
SENSOR
IC11 – 13
LOAD IN SW 6
LOAD OUT SW 7
LOAD IN
LOAD OUT
S842
(LOAD)
D-SENS 92
DISC IN
DETECT SENSOR
D841, Q841
LOAD NEG 3
LOAD POS 2
LOADING
MOTOR CONTROL
Q881 – 884
TABLE POS 5
TABLE NEG
TABLE
MOTOR CONTROL
Q885 – 888
100
3
2RN1
FN1
16
17
MOTOR
DRIVE 9
8
10
11
MOTOR
DRIVE
OUT1 –
OUT1 +
OUT2 –
OUT2 +
RIN2
FIN2
LOADING/TABLE
MOTOR DRIVE
IC881
M51
(LOADING)
M
MM52
(TABLE)
SYSTEM CONTROLLER
IC801 (1/5)
• SIGNAL PATH
: CD PLAY (ANALOG)
: CD PLAY (DIGITAL OUT)
• R-ch is omitted due to same as L-ch.
OPTICAL
TRANSCEIVER
IC361
OPTICAL
OUT (CD)
CD
L-CH
RFAC
VCA
SECTION 5
DIAGRAMS
5-1. BLOCK DIAGRAM –CD SERVO Section –

HCD-MG110/MG310AV
1818
FM ANT
ANT GND
AM ANT
ANT GND DO
TU-CLK
TU-CE
TUNED
L-CH
R-CH
DI
TUNER PACK
FM 75Ω
AM
R-CH
78
TU-DI
80
TU-DO
79
TU-CLK
77
TU-CE
76
TU-TUNED
DI
DO
CLK
CE
TUNED
DO
CLK
CE
TUNED
DI
R-CH
L-CH
R-CH
L-CH
R-CH R-CH
HP101
(PLAY)
HRPE101
(REC/PLAY/ERASE)
13
2
4
R-CH R-CH
REC/PB SWITCHING
IC402
R-CH
BIAS OSC
T401
T403
BIAS
TRAP
C429, R429
REC BIAS
SWITCH
Q402, 403
AU +9V
BIAS OSC
Q401
TRIGGER
PLUNGER DRIVE
(DECK B)
Q385, 386
TRIGGER PLUNGER
(DECK B)
59
A-TRIG
TRIGGER
PLUNGER DRIVE
(DECK A)
Q383, 384
TRIGGER PLUNGER
(DECK A)
60
B-TRIG
89
B-SHUT
97
A-SHUT
TAPE MECHANISM
DECK BLOCK
(2/2)
23
24
B IN-L
A IN-L
19
A/B SW
R-CH
PB
AMP 20
PB-L
6
MIX
OUT
+
R-CH
PB AMP
IC401 (1/2)
70
DVD
69
TAPE
1 2
4 3
5 13
INPUT SELECT
SWITCH
IC306
R-CHR-CH
68
PB-MUTE
50
REC-MUTE
14
REC
OUT-L
REC
IN-L
REC
AMP
REC AMP
IC401 (2/2)
16
MUTING
Q112
R-CH
67
AMS
53
PB-A/B
54
PB/REC
MUTING
Q102
AMS DET
Q404, 405
R-CHR-CH
MUTING
Q101
D(Page 19)
TAPE
L-CH
C(Page 19)
5.1CH
B(Page 19)
TUNER
L-CH
E(Page 19)
REC
L-CH
58 MO-ON
CAPSTAN
MOTOR DRIVE
Q381, 382
MOTOR
+12V
SENSOR B+
MM
M1
(CAPSTAN)
56
B-PLAY
61
A-PLAY
(DECK B PLAY)
TAPE MECHANISM
DECK BLOCK
(1/2)
(DECK A PLAY)
66
A-HALF
(DECK A HALF)
90
B-HALF
(DECK B HALF)
(DECK B REC)
(DECK A REC)
SYSTEM CONTROLLER
IC801 (2/5)
(HCD-MG310AV)
(HCD-MG110)
(HCD-MG310AV)
•SIGNAL PATH
•R-ch is omitted due to same as L-ch.
: TUNER
: TAPE PLAY (DECK A)
: REC
: 5.1CH INPUT
: TAPE PLAY (DECK B)
ROTATION
DETECT SENSOR
(DECK A)
ROTATION
DETECT SENSOR
(DECK B)
5-2. BLOCK DIAGRAM –TUNER/TAPE DECK Section –

HCD-MG110/MG310AV
1919
74
76
22 23 24 8 7 6
9
3
1
17
1615
26 27
INPUT
AUTO-BALANCE
DELAY
VOLUME
MODIFIED
BNR
TRIMMER,
VOLUME
TRIMMER,
VOLUME
PSEUDO
STEREO
NOISE
SEQUENCER
TRIMMER,
VOLUME
L+R
2L–R
CPU
INTERFACE
DATA REQ SCK
COMMAND
SLIN
CIN
LTIN
R-CH
R-CH
SELECTOR
CENTER
MODE
CONTROL
10KBIT S-RAM
LOGIC
CIRCUIT
ADAPTIVE
MATRIX
R-CH
PS
RIN
PS
LIN
DS2L
OUT DIN
L
C
R
SW
OUT
SWVOL
IN
S
4240
45
1011
DVOL
OUT
R-CH
LOUT
CVOL OUT
SLVOL OUT
SLVOL
IN
CVOL
IN
BNR
IN
+
SWVOL OUT
C
OUT
SL
OUT
DOLBY PRO LOGIC
SURROUND PROCESSOR
IC301
3
5
7
1
9
B1
C1
D1
A1
E1
INPUT SELECT
LINE
OUT
LOGIC
32
1514
DATA CLK
51 V-DATA
52 V-CLK
DATA CLK
R-CH
R-CH
J304
VIDEO OUT
J701
J302
VIDEO IN
L
R
AUDIO
L
R
VIDEO
J301
FRONT
L
R
REAR
L
R
CENTER
SUPER
WOOFER
5.1CH
INPUT
R-CH
R-CH
C
FRONT
REAR
CENTER
WOOFER
(Page 18) 5.1CH
REAR
CENTER
FRONT
77
20
OUT1
29 VOL1 SOUND
CONTROL
ELECTRICAL VOLUME
IC302 (2/2)
AMP
IC304 (2/2)
MUTING
Q232
SUPER WOOFER
OUT
MUTING
CONTROL
Q333, 334
LOW-PASS
FILTER
IC304 (1/2)
+R-CH
J303
G(Page 20)
FRONT
L-CH
REAR
L-CH
CENTER H(Page 20)
(Page 20)
J
F
(Page 21)
E
(Page 18)
A
(Page 17)
B
(Page 18)
D
(Page 18)
CD
L-CH
TUNER
L-CH
TAPE
L-CH
INPUT SELECT
IC302 (1/2)
PL-DATA
PL-RQ
PL-CLK
27 28 25
S/W-MUTE
38
+
R-CH
WOOFER SWIN
79
80 VRSWIN
LIN
72
DATA
CLK
SYSTEM CONTROLLER
IC801 (3/5)
•SIGNAL PATH
: TUNER
: CD PLAY
•R-ch is omitted due to same as L-ch.
: TAPE PLAY
: REC
: VIDEO IN (AUDIO)
: GAME IN (AUDIO)
: GAME IN (VIDEO)
: 5.1CH INPUT
(HCD-MG310AV)
(HCD-MG110)
(HCD-MG310AV)
REC
L-CH
SPE ANA
(HCD-MG310AV)
5-3. BLOCK DIAGRAM –SURROUND Section –

HCD-MG110/MG310AV
2020
R-MUTE
1011
6 12
98
REAR OUTPUT
SELECT SWITCH
IC307
R-CH R-CH
DBFB
SWITCH
Q141
DBFB LEVEL
CONTROL
Q142
R-CH
R-CH
POWER AMP
IC501
MUTING
Q517, 518
MUTING
CONTROL
Q522
MUTING
Q501
MUTING
CONTROL
Q502, 516
R-CH
65
STK-MUTE
44
A-MUTE
23
R-MUTE
21
C-MUTE
STK-MUTE
A-MUTE
R-MUTE
C-MUTE
34
FRONT
35
REAR
47
DBFB-ON
48
DBFB-H/L
49
SURROUND
STK MUTE
STK MUTE
R-CH
MUTING
Q602, 603
MUTING
CONTROL
Q341, 342
MUTING
Q601
POWER AMP
IC602
MUTING
CONTROL
Q343, 344
C-MUTE
Q524
POWER ON
MUTING
Q521
D513
AU +9V
PROTECT
DETECT
Q514
PROTECTOR
Q505, 508
+
TH501
TERMINAL
DETECT
Q511, 512
D501
OVER LOAD
DETECT
Q506, 507
+ + +
+
+ ++
OVER LOAD
DETECT
Q604, 605
OVER LOAD
DETECT
Q606
MUTING
Q519, 520
MUTING
CONTROL
Q523
+
–
+
–
+
–
40
R-RELAY
HP CHK
F-RELAY
55
F-RELAY
45
HP-CHK
DC DETECT
Q513, 515
RY502
RY503
RELAY DRIVE
Q504, 510
HP CHK F-RELAY
RELAY DRIVE
Q503, 509
J501 (2/2)
J502
REAR
IMPEDANCE
USE 8Ω
L
R
SURROUND
SPEAKER
CENTER
IMPEDANCE
USE 8Ω
+
–
+
–
FRONT SPEAKER
IMPEDANCE
USE 8Ω
L
R
PHONE
J503
RY501
SURROUND
AMP
IC308
SURROUND
SWITCH
Q301
DBFB AMP
IC303
SYSTEM CONTROLLER
IC801 (4/5)
D389
D395, 399
•SIGNAL PATH
: TUNER
•R-ch is omitted due to same as L-ch.
FRONT
L-CH
G
(Page 19)
REAR
L-CH
J
(Page 19)
CENTER
H
(Page 19)
J501 (1/2)
(HCD-MG110)
(HCD-MG310AV)
(HCD-MG110)
(HCD-MG310AV)
5-4. BLOCK DIAGRAM –AMP Section –