Emerson MD-1777 Service manual
SERVICE MANUAL
IN CAR DVD-VIDEO PLAYER
MD1777
CAUTION
BEFORE SERVICING THE CHASSIS, READ THE "SAFETY
PRECAUTIONS", IN THIS MANUAL.
• Safety Check after Servicing
Examine the area surrounding the repaired location for damage or deterioration. Observe that screws, parts and wires
have been returned to original positions. Afterwards, perform the following tests and confirm the specified values in
order to verify compliance with safety standards.
1. Insulation resistance test
Confirm the specified insulation resistance or greater between power cord plug prongs and externally exposed parts
of the set (RF terminals, antenna terminals, video and audio input and output terminals, microphone jacks, earphone
jacks, etc.). See table below.
2. Dielectric strength test
Confirm specified dielectric strength or greater between power cord plug prongs and exposed accessible parts of the
set (RF terminals, antenna terminals, video and audio input and output terminals, microphone jacks, earphone jacks,
etc.) See table below.
3. Clearance distance
When replacing primary circuit components, confirm
specified clearance distance (d), (d') between soldered
terminals, and between terminals and surrounding
metalic parts. See table below.
Table 1: Rating for selected areas
* Class II model only.
Note: This table is unofficial and for reference only. Be sure to confirm the precise values for your particular country
and locality.
4. Leakage current test
Confirm specified or lower leakage current between B (earth ground, power cord plug prongs) and externally
exposed accessible parts (RF terminals, antenna terminals, video and audio input and output terminals, microphone
jacks, earphone jacks, etc.)
Measuring Method: (Power ON)
Insert load Z between B (earth ground, power cord plug
prongs) and exposed accessible parts. Use and AC
voltmeter to measure across both terminals of load Z.
See figure and following table.
Table 2: Leakage current ratings for selected areas
Note: This table unofficial and for reference only. Be sure to confirm the precise values for your particular country and
locality.
Fig. 2
AC Line Voltage Region
Insulation Dielectric Clearance
Resistance Strength Distance (d), (d')
100V Japan ≥ 1 MΩ/500 VDC 1kV 1 minute ≥ 3 mm
110 to 130V
USA &
– – –
900V 1 minute ≥ 3.2mm
Canada
* 110 to 130 V Europe
≥ 10 MΩ/500 V DC 4 kV 1 minute
≥ 6 mm (d)
200 to 240 V Australia
≥ 8 mm (d')
(a: Power cord)
Fig. 1
AC Line Voltage Region
Earth Ground
Load Z Leakage Current (i)
(B) to:
100V Japan ¡ ≤ 1m A rms
Exposed accessible
parts
110 to 130 V
USA &
¡ ≤ 0.5 m A rms
Exposed accessible
Canada parts
¡ ≤ 0.7 m A peak Antenna earth
110 to 130 V Europe ¡ ≤ 2 m A dc terminals
200 to 240 V Australia ¡ ≤ 0.7 m A peak
Other terminals
¡ ≤ 2 m A dc
Chassis
d
Primary circuit terminals
d'
a
Exposed
accessible
part
Z
AC Voltmeter
(high impedance)
Earth Ground
power cord plug prongsB
1k
1.5kµF
1.5k
2k
50k
TOTAL CONTENTS
1
SECTION 1. GENERAL....................................................................................................................2
SECTION 2. CABINET & MAIN FRAME.........................................................................................6
SECTION 3. ELECTRICAL ............................................................................................................10
SECTION 1. GENERAL
2
CONTENTS
1-1. SPECIFICATIONS............................................................................................................................3
1-2. IDENTIFICATION AND OPERATION OF CONTROLS...............................................................4
* Design and specifications subject to change without notice.
1-1. SPECIFICATIONS
3
Power DC 12V Negative Ground
Consumed electricity 24W (supplementary 2.5W)
Weight 5.3kg
Dimension (WxHxD) 250mm x 135mm x 266.5mm
Operative temperature 5¡C ~ 35¡C
Installation condition Horizontal / Relative humidity under 80%
Signal type NTSC COLOR
VIDEO input 1.0Vp-p unbalanced, RCA JACK
AUDIO input -8.8dBm, RCA JACK
VIDEO output VIDEO output terminal, 1.0Vp-p unbalanced, RCA JACK
AUDIO output Audio output terminal (2 kinds): -7.8dBm(VCP), 2.0Vrms(DVD), RCA JACK
Playable tape Very high density tapes with VHS marks
Playable disc DVD, VIDEO-CD, CD (12mm), CD (8mm), MP3, CD-R, CD-RW, DVD-RW, DVD+RW
Tape speed SP: 33.35mm/s, SLP: 11.12mm/s
Playtime SP: 2hrs, SLP: 6hrs (use of T-120 tape)
VIDEO S/N (VCP) Over 43dB (Standard recording)
Resolution VCP Over 220 lines (Standard recording)
DVD Over 500 lines (DVD Disc PLAY)
AUDIO (VCP) Over 40dB
AUDIO (DVD) 80dB
AUDIO dynamic range 90dB
1-2. IDENTIFICATION AND OPERA TION OF CONTROLS
4
!@#$ %^ &*
(
)
1
2
“
09876 543
! SOURCE
Use to change DVD mode to VCP and vice versa.
@ MENU
Used to display the contents menu of the loaded DVD disc.
This function is disc dependent. A DVD disc may not
contain a contents menu.
#
Cursor LEFT/RIGHT
Used to move to the desired menu. Also can be used to
display function.
$
ENTER
%
Place to insert disc
^
Cursor UP/DOWN
Used to move to the desired menu.A lso can be used to
display function.
&
PREVIOUS
Used to move to the previous chapter (DVD)or track(VCD or
CDDA)from the current chapter or track. Pressing this
button shows previous play list when playing VCD with
PBC.
*
NEXT
In DVD,used to move to the next chapter (DVD)or track
(VCD or CDDA)from the current chapter or track. Pressing
this button shows next play list when playing VCD with
PBC.
In VCP,used to watch a series of screens one by one
(Frame Advance).
(
DISC EJECT
To eject a disc or tape,press EJECT button.
)
Remote control receiver
1
Place to insert video tape.
2
AV JACK
Connect these jacks to the audio/video out jacks terminal
of your Game machine or Camcorder using the RCA cord
provided.
3
EJECT
To eject a disc or tape,press EJECT button.
4
AV.SW
AV.SW is used to display each output screen on the TV
monitor by matching each screen with output source.
5
TRACKING -/+
Use to adjust the display suitable for warching.
6
FF
To play a disc or tape fast forward.While Paused,this
button will play slow forward.
7
PLAY.PAUSE
Use this button to play or pause the disc (or tape).Pressing
this button during play,causes the disc (or tape)to pause if
in pause mode it functions as the PLAY button.
8
REW
To play a disc or tape fast reverse.While Paused,this
button will paly slow reverse.(DVD only)
9
STOP
To stop the current playing mode,press STOP. When using
VIDEO CD2.0,CVD and SVCD with PBC function included,
this button works as a RETURN button.
To stop PBC, disc, use PBC button.
0
POWER/STANDBY
Activates the unit POWER ON or STANDBY.
“
Operation indicator
(DVD indicator,DISC IN indicator,VCP indicator. Cassette
IN/Auto REPEAT indicator,DEW/Hi-Fi indicator)
5
!
NOTE: This VCP is for 12Vdc use only; DO NOT use in 24Vdc vehicles. If you use this unit in a 24Vdc vehicle, all the
indicator lamps will blink indicating a major malfunction. Disconnect the plug from the power source
immediately.
! Infrared (IR) INPUT Connector
This connector provides a two wire interface with various Flexvision video monitor
products.
* Connector description
@ Infrared (IR) INPUT Connector (Remote Eye)
This connector provides a three-wire interface with receiver accessory. (Remote Eye).
(P/N 136-2070)
# AUDIO/VIDEO IN Connector
These connectors provide an interface to the AUDIO/VIDEO OUT connectors of your
Game machine or Camcorder using an RCA cord.
$ DC 12V Jack
When using a DC power source, connect this jack to 12V DC.
* Connector description
% AUDIO/VIDEO OUT Connectors
These connectors provide an interface to the AUDIO/VIDEO IN connectors of your
video monitor, using an RCA cord.
# $ %
@
SECTION 2. CABINET & MAIN FRAME
6
CONTENTS
2-1. EXPLODED VIEW............................................................................................................................7
1) MAIN CHASSIS
2) PANEL FRONT
2-2. PACKING ASSEMBLY....................................................................................................................9
2-1. EXPLODED VIEW
7
1) MAIN CHASSIS ASS'Y
T1
9
8
2) P ANEL FRONT ASS'Y
5
6
7
8
10
15
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