akira MC-4200DVD User manual

DVD MICRO HIFI
Service Manual

2
Model No.: MC-4200DVD
Version: 1.0
MODEL:
MC-4200DVD

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Model No.: MC-4200DVD
Version: 1.0
CONTENTS
SPECIFICATION ........................................................................................................................4
SAFETY PRECAUTIONS...........................................................................................................5
WIRING DIAGRAM...................................................................................................................10
BLOCK DIAGRAM.................................................................................................................... 11
DISASSEMBLY FOR REPAIR..................................................................................................12
CIRCUIT DESCRIPTION .........................................................................................................14
EXPLODED VIEW ....................................................................................................................17
PART LIST ................................................................................................................................18

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Model No.: MC-4200DVD
Version: 1.0
SPECIFICATION
♦ DVD/VCD/CD PLAYER FUNCTION
 DVD, VCD, CD, CD-R, CD-RW, MP3, HDCD Supports.
 Fluorescent Display.
 Coaxial AC-3/DTS Digital Output.
 R/L Channel Audio Output.
 On-Screen Display (English, German, Spanish, French / DVD Logo Opening Screen).
 16:9 / 4:3 Picture Select.
 Slow Motion 1/2, 1/4, 1/8, 1/16
 F.B / F.F x2, x4, x8, x16 Speed.
 Angle Menu.
 20 Track Program For CD Playing.
 Zoom x2, 3, 4
 48 Keys Remote Control.
 2.1-CH Active Speaker System
♦GENERAL SPECIFICATION
 Dimensions (unit):
65(W) x 238(H) x 285(D)mm
 Dimensions (speaker boxes):
88(W) x 238(H) x 168(D)mm
 Dimensions (subwoofer):
138(W) x 238(H) x 360(D)mm
 2-CH Stereo Speaker
10W x 2 (6 ohm)
 Sub-woofer: 30W x 1 (6 ohm)
 Power Source: AC: 230V

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Model No.: MC-4200DVD
Version: 1.0
SAFETY PRECAUTIONS
Before returning a unit to the customer, always make a safety check of the entire unit,
including, but not limited to the following items:
1 Be sure that no built-in protective devices are defective and /or have been defected
during servicing.
a. Protective shields are provided to protect both the technician and the customer.
Correctly replace all missing protective shields including any removed for servicing
convenience.
b. When reinstalling the chassis and /or other assembles in the cabinet, be sure to put
back in place all protective devices, including, but not limited to, nonmetallic control
knobs, insulating fish papers adjustment and compartment covers/shields and
isolating resistor/ capacitor networks. Do not operate this or permit it to be operated
without all protective devices correctly installed and functioning.
2 Be sure that there are no cabinet openings through which an adult or child might be able
to insert their fingers and contact a hazardous voltage. Such opening include, but are
not limited to, excessively wide cabinet ventilation slot, and an improperly fitted and / or
incorrectly secured cabinet back cover.
3 Leakage current hot check – with the unit completely reassembled, plug the AC line cord
directly into a 120V AC outlet. (Do not use an isolation transformer during this test) Use
a leakage current tester or a metering system that complies with American National
standards Institute (ANSI) C 101.1” Leakage Current for Appliances” and Underwriters
Laboratories (UL) 1410 (50.7). WITH THE UNITAC switch first in the ON position and
then in the OFF position, measure from a known earth ground (metal water pipe, conduit,
etc.) To all exposed metal parts of the unit (antennas, handle bracket, metal cabinet,
screw heads, metallic overlays, control shaft, etc.) especially any exposed metal parts
that offer an electrical return path to the chassis. Any current measured must not exceed
0.5 milliamp, reverse the unit power cord plug in the outlet and repeat test. ANY
MEASUREMENTS NOT WITHIN THE LIMITS SPECIFIED HERENING INDICATE A
POTENTIAL SHOCK HAZARD THAT MUST BE ELIMINATED RETURNING THE UNIT
TO THE CUSTOMER.

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Model No.: MC-4200DVD
Version: 1.0
4 Insulation resistance test cold check. Unplug the power supply cord and connect a
jumper wire between the two prongs or the plug. Turn on the power switch of the unit.
Measure the resistance with an ohmmeter between jumpered AC PLUG AND EACH
Exposed metallic cabinet part on the unit, such as screw heads, antenna, control shafts,
handle brackets, etc. when the exposed metallic part has a return path to the chassis,
the reading should be between 1 and 5.2 megohms. When there is no return path to the
chassis, the reading must be “infinite”. If it is not within the limits specified, there is
possibility of a shock hazard, and the unit must be repaired and rechecked before it is
returned to the customer.

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Model No.: MC-4200DVD
Version: 1.0
PRODUCT SAFETY NOTICE
Some electrical and mechanical parts have special safety related characteristics, which are
often not evident from visual inspection. Nor can the protection they give necessarily be
obtained by replacing them with components rated for higher voltage, wattage, and etc.
parts that have special safety characteristics are identified by a symbol on schematic and
parts list. Use of a substitute replacement that dose not have the same safety characteristics
as the recommended replacement part might create shock, fire, and /or other hazards.
Product safety is under review continuously and new instructions are issued whenever
appropriate.

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Model No.: MC-4200DVD
Version: 1.0
SERVICING PRECAUTION
Before servicing the unit covered by this service by this service manual and its supplements.
Read and follow the SAFETY PRECAUTIONS on this page. If unforeseen circumstances
create a conflic between the following servicing precautions and any of the safety
precautions, always follow the safety precautions.
1 Always unplug the unit’s AC power cord from the AC power source before:-
a. Removing or reinstalling any component, circuit board, module or any other
assembly.
b. Disconnecting or connecting any unit electrical plug or other electrical connection.
c. Connecting a test substitution in parallel with an electrical capacitor. Caution: a
wrong part substitution or incorrect polarity installation of electrolytic capacitors may
result in an explosion hazard.
2 Do not defeat any plug/ socket b+ voltage interlocks with which the unit covered by this
service manual might be equipped.
3 Do not apply AC power to this unit and /or any its electrical assemblies unless all
solid-state device heat sinks are correctly installed.
4 Always connect a test unit instrument’s ground lead to the unit’s chassis ground before
connecting the test instrument’s positive lead always remove the test instrument’s
ground leadlast.

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Model No.: MC-4200DVD
Version: 1.0
LASER PRECAUTION
1 When servicing, (incase it is necessary to confirm laser beam emission) be sure not to
place your eyes any closer than 1 or 30 cm from the surface of the objective lens on the
optical pickup block.
2 Laser Diodes are extremely susceptible to damage from static electricity even if a static
discharge dies not ruin the diode, it can shorten its life or cause it to work improperly.
When replacing the pick up, use a conductive mat on the floor and desk and wear a
wrist band connected to ground through a 1M ohm resistor to protect the laser diode
from static damage. If the lens should get dusty, blow off the dust carefully from the
object.
3 There are no adjustable parts in the pickup assembly. If it is defective, replace the whole
pickup assembly.
CAUTION:
1. Use of controls, adjustment or performance of procedures herein may result in
hazardous radiation exposure.
If interlock fails or is defeated, the laser light is able to function. The laser is invisible,
avoid direct exposure to beam.

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Model No.: MC-4200DVD
Version: 1.0
WIRING DIAGRAM
5P
6P
CD MECHANISM
5P
CN802 CN801
6P
6P
5P
MPEG BD.
J5 6P
J9
J4
J2
24P
J8
J1
6P
J8
J8
POWER SWITCH
AC IN
AUDIO OUT
POWER/JACK BD.
2P
4P
11P
CN303CN304
5P 6P
SCART
OPTICAL OUT
VIDEO OUT
COAXIAL
6P
CN302
11P
CN301
DISPLAY BD.

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Model No.: MC-4200DVD
Version: 1.0
BLOCK DIAGRAM
SW801-812
Function Key
T367 KEY/DISPLAY
CONTROL BOARD
U1,U3,U5,U10,U11,U12
<MPEG>
U8
Memory
U4
Servo
DVD/CD
Loader
DV-34
U6
Clock
MPEG BOARD
Digital Out
IC301
Op. Amp
AV JACK BOARD
Standby/Open LED
DISPLAY VFD801
IC801
System Control Microprocessor
R.G.B. Out
Q309-311
F.SW
Q308
JK304
IR
Input
IC802
Remote Sensor
Coaxial Out
Video Out
AC
+5V,AC3V5,-27V
To Display/Ctrl. Board
POWER BOARD
+5V, +2V5
To MPEG Board
+12V, -12V, +5V
To AV Jack Board
IC801
Switching Power
Audio Out
+5V
SCRAT Out
JK307
AV Signal From
MPEG BD.
Y1
27MHz
CLK. 27MHz +5V
AC3V5
-27V
T1
+5V

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Model No.: MC-4200DVD
Version: 1.0
DISASSEMBLY FOR REPAIR
To disassembly the rear cabinet.
1. Remove the 2 screws (A) from the rubber foot and bottom cabinet.
2. Remove the 4 screws (B) from the bottom cabinet.
3. Remove the 6 screws (C) from the rear cabinet.
AB
CC
To disassembly the top cabinet.
4. Remove the 3 screws (D) from the top cabinet.
5. Remove the 6 screws (E) from the left side and bracket.
F
E
D

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Model No.: MC-4200DVD
Version: 1.0
To remove the rear cabinet.
6. Remove the 8 screws (G) from the rear cabinet.
G
G

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Model No.: MC-4200DVD
Version: 1.0
CIRCUIT DESCRIPTION
Programmable shunt regulator: KA431AZTA (IC603)
CATHODE
REFERENCE(R)
ANODE(A)
REFERENCE
ANODE
CATHODE(K)
2.5 Vref
Infrared remote control transmitter: PT2222-002 (IC1)
1
KI/O19
6
6KI
7
DD
SS
SEL
REM
OSCI
OSCO
V
V
1411
12 13
8
10
9
7
17
16
15
18
7
KI/O
LMP
4
KI/O
KI/O
KI/O 6
5
KI/O3
2
4
KI
KI
KI
KI
KI
3
3
54
5
21
2
22
20
21
24
23 0
CCS
KI/O
KI/O
0
1
KI
KI

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Model No.: MC-4200DVD
Version: 1.0
VFD driver/ controller IC: PT6319LQ (IC801)
OSC
Interface
Data
Serial
Register
General
Input
Driver
LED
LED3
LED4
LED2
LED1
STB
SW2
SW4
SW3
SW1
R
OSC
VDD
DIN
CLK
DOUT
SG15/GR8
Diming Circuit
K2K1 K3 K4 VDD GND
Driver
VEE
Grid
GR5
GR6
GR4
GR2
GR3
GR1
SG16/GR7
(16 bits x 11 Words)
Key Matrix Memory
Timing Generator
Display Memory
Control
Output
Grid
Key Scan
Driver/
Driver/
Segment
SG11
SG13/GR10
SG14/GR9
SG12/GR11
SG10
SG9
SG6/KS6
SG7
SG8
SG5/KS5
SG3/KS3
SG4/KS4
SG2/KS2
SG1/KS1

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Model No.: MC-4200DVD
Version: 1.0
Power Switch: KA5L0365RN (IC601)
Power on reset
Internal
bias
Q
7.5V
OVER VOLTAGE S/D
7.5V Thermal S/D
(*#4 FB)
(*#3 VCC)
#4 FB
#3 VCC
Vref
1R
9V
5uA 1mA
2.5R
0.1V
L.E.B
R
Good
logic
OSC
S
32V 5V
S
Q
R(*#2 GND)
#1 GND
(*#1.6.7.8 DRAIN)
SFET
#2 DRAIN
Wide bandwidth dual bipolar operational amplifier: TJM4558D (IC301)
Non-inverting input 1
Vcc -
Output 1
Inverting input 1
4
3
1
2
Non-inverting input 2
Inverting input 2
5
6
Vcc +8
Output 27

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Model No.: MC-4200DVD
Version: 1.0
EXPLODED VIEW

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Model No.: MC-4200DVD
Version: 1.0
PART LIST
NO PART NO DESCRIPTION
1 130-03670-013 T36M DECORATION BAR (LEFT)
2 116-03673-088 T367M DISPLAY LENS
3 130-03670-213 T367M DECORATION BAR (RIGHT BOTTOM)
4 130-03670-113 T367M DECORATION BAR (RIGHT TOP)
5 101-03670-001 T367M FRONT CABINET
6 128-03672-013 T367 BUTTON SET
7 180-03671-056 T367M METAL SIDE PLATE-LEFT
8 114-03670-001 T367M FRONT DOOR LENS
9 128-03670-013 T367 POWER BUTTON
10 136-07002-250 T367M RUBBER FOOT (7X25X2MM)
11 180-03674-000 T367 METAL BOTTOM CABINET
12 130-03674-010 T367 POWER BUTTON ADAPTOR
13 160-00034-000 DVD MECHANISM SANYO DV 34
14 180-03672-056 T367M METAL SIDE PLATE-RIGHT
15 001-03670-750 T367 KEY/DISPLAY CONTROL P.C.B. (94HB)
16 049-06153-001 DISPLAY VACUUM FLUORESCENT VFD40-0615FN
17 129-03679-310 T367 KEY P.C.B. BRACKET
18 129-03675-010 T367 FL DISPLAY BRACKET
19 128-03670-113 T367M OPEN BUTTON
20 133-03673-310 T367 MOUNTING BRACKET-T
21 129-03679-010 T367 SERVO P.C.B. MOUNTING BRACKET –A/B
22 001-03110-100 T311M MPEG P.C.B.
23 129-03679-210 T367 SERVO P.C.B. MOUNTING BRACKET-C
24 020-41100-008 POWER SWITCH SS-160-7
25 046-20300-022 RCA JACK RS-313-18
26 023-60020-203 AC LINE CORD VDE APPLICATION 6’
27 046-20200-019 T083F RCA JACK RS-213-13 (2P)
28 125-03670-000 T367 PCB COVER PLATE
29 046-20100-021 RCA JACK PCB-TYPE RS-116/OR(1P)(ORANGE)
30 046-50100-002 S-VIDEO SOCKET MD-121

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Model No.: MC-4200DVD
Version: 1.0
NO PART NO DESCRIPTION
31 001-03672-400 T367PB POWER/JACK P.C.B. (94V0)
32 180-03673-056 T367M METAL TOP CABINET
33 144-53006-201 SCREW 3X6 STB (TB) BBZ30P060FMC)
34 145-10830-008 FIBRE WASHER M3
35 145-10830-008 FIBRE WASHER M3
36 144-10008-101 SCREW 3X8 RT
37 144-53007-202 SCREW 3X7 STB (TB)
38 144-53006-201 SCREW 3X6 STB (TB) (BBZ30P060FMC)
39 144-53008-411 SCREW 3X8 STK (TB) BLACK
40 144-13008-100 SCREW 3X8 RT (A)
41 144-53006-201 SCREW 3X6 STB (TB) BBZ30P060FMC)
42 144-53006-201 SCREW 3X6 STB (TB)(BBZ30P060FMC)
43 144-53008-201 SCREW 3X6 STB (TB)(BBZ30P060FMC)
44 144-13008-100 SCREW 3X8 RT (A)
45 144-13008-100 SCREW 3X8 RT (A)
46 145-20830-005 METAL WASHER M3 (3X8X0.5MM)
47 144-10008-101 SCREW 3X8 RT
48 144-12608-900 SCREW 2.6X8 RT (A)
49 144-12608-900 SCREW 2.6X8 RT (A)
50 144-12608-900 SCREW 2.6X8 RT (A)
51 144-10008-101 SCREW 3X8 RT
52 144-53006-201 SCREW 3X6 STB (TB) (BBZ30P060FMC)
53 144-53006-201 SCREW 3X6 STB (TB) (BBZ30P060FMC)
54 144-53006-201 SCREW 3X6 STB (TB) (BBZ30P060FMC)
55 144-53006-201 SCREW 3X6 STB (TB) (BBZ30P060FMC)
56 144-23012-201 T367 SCREW 3X12 BM
57 180-03675-0401-220 T380PB METAL REAR PLATE
58 133-03678-310 T367 MOUNTING BRACKET-B
59 046-20200-055 VCD928/RZ8300 RCA JACK RS-213-01