Philips MCD-122 Service manual

DVD Micro System

MCD122

TABLE OF CONTENTS

Location of PC Boards ............................................. 1-1

Electronic Specification

Measurement Setup ................................................ 1-3

Service Aids............................................................... 1-4

Instruction On CD Playability ........................... 1-5 to 1-6

Software Version Check & Upgrade ........................ 2-1

Malfuction Check Chart ............................................. 2-2

Disassembly Diagram................................................ 3-1

Block Diagram ......................................................... 4-1

Wiring Diagram ......................................................... 4-2

Small Board .................................................................. 5

Circuit diagram ...................................................... 5-1

Layout diagram ...................................................... 5-1

LCD Display Board ...................................................... 6

Circuit diagram ...................................................... 6-1

Layout diagram ...................................................... 6-2

Power Board ............................................................... 7

Circuit diagram ............................................. 7-1 to 7-2

Layout diagram ...................................................... 7-3

............................................. 1-2

Recordable

ReWritable

Decoder Board ............................................................ 8

Circuit diagram ............................................. 8-1 to 8-4

Layout diagram ...................................................... 8-5

Exploded View ......................................................... 9-1

Service Partlist .......................................... 10-1 to 10-2

Factory Partlist ...................................................... 11-1

2009

DB 1004

Version 1.1

3141 785 34131

Location of PC Boards

Decoder Board

1-1

Scart Board

AMP/Power Board

VERSION VARIATION

Board in used:

LCD DISPLAY BOARD
HEADPHONE BOARD

POWER BOARD

DECODER BOARD

S

:

Type /Versions:

Service policy

SCART BOARD

Type /Versions:

Features

RDS
VOLTAGE SELECTOR
ECO STANDBY - DARK

TDS

* TIPS : C -- Component Level Repai r.

M -- Module Level Repair

-- Used

Feature diffrence

LCD Display Board USB/Headphone Board

MCD122

/05

/05

/12

C
M

M
M

M

/12

/37

/37

/55

/55

/58

/58

/61

MCD122

/61

/79

/79

/93

C
M

M
M

/93

/94

/94

/96

/96

/98

C
M

M
M

/98

Electronic Specification

1-2

AMPLIFIER

Rated Output Power ......................... 2X20W RMS

Signal-to-noise ratio ...................................≥65dBA

Frequency response ............... 20Hz--20kHz ±3dB

Aux Input ................................... 1V/ RMS 16kohm

DISC

Laser Type .................................... Simeconductor

Disc Diameter ....................................... 12cm/8cm

Support Disc ...............................................CD-DA,

CD-R,CD-RW,MP3,DVD,DVD-RW,DVD+RW

Audio DAC .....................................................1KHz

Total Harmonic Distortion .............................. < 1%

Frequency Response ..................... 20Hz ~ 20KHz

S/N Ration ..................................................>65dBA..

TUNER

FM Tuning Range .......................... 87.5--108 MHz

Tuning grid ........................................ 100K/50KHz

Sensitivity

– Mono, 26dB S/N Ratio ................................. 5uV.

– Stereo, 46dB S/N Ration .......................... 100uV

Selectivity ................................................... ＞33dB

Image Rejection ......................................... ＞25dB

Total Harmonic Distortion ................................. 3%

Signal to Noise Ration .............................. ≥50dBA

SPEAKERS

Speaker Impedance ............................................ 2x8ohme.

Speaker Driver, base .....................................................4”

Speaker Driver, tweeter ....................................... Buzzer

Frequency Response ................. 100Hz +5dB+/-5 15KHz

GENERAL INFORMATION

Total Output power ...........................................40W RMS

AC Power ......................................................220V / 50Hz...

Operation Power Consumption ................................ 40W

Standby Power Consumption ................................. ＜6W

Eco Standby Power Consumption .......................... ＜1W

Headphone Output .................................. 500mV 32ohm.

USB Direct ..................................................... Version 2.0

Dimensions

– Main unit (w x h x d) ............................ 220x90x240mm

– Speaker box (w x h x d) .................... 100x220x160mm

– SUBwoofer(w x h x d) ...............................................NA

Weight

– With Packing .......................................................... 6KG

– Main Unit ...........................................................1.65 KG

– Speaker box .....................................................1.5x2KG

– SUBwoofer............................................................... NA

Specifications and external appearance are
subject to change without notice.

e

MEASUREMENT SETUP

Tuner FM

1-3

Bandpass

LF Voltmeter

e.g. PM2534

RF Generator

e.g. PM5326

DUT

250Hz-15kHz

e.g. 7122 707 48001

Ri=50:

S/N and distortion meter

e.g. Sound Technology ST1700B

Use a bandpass filter to eliminate hum (50Hz, 100Hz) and disturbance from the pilottone (19kHz, 38kHz).

Tuner AM (MW,LW)

RF Generator

e.g. PM5326

Ri=50:

DUT

Frame aerial

e.g. 7122 707 89001

Bandpass

250Hz-15kHz

e.g. 7122 707 48001

LF Voltmeter

e.g. PM2534

S/N and distortion meter

e.g. Sound Technology ST1700B

To avoid atmospheric interference all AM-measurements have to be carried out in a Faraday´s cage.
Use a bandpass filter (or at least a high pass filter with 250Hz) to eliminate hum (50Hz, 100Hz).

CD

Use Audio Signal Disc
(replaces test disc 3)

DUT

L

R

SBC429 4822 397 30184

S/N and distortion meter

e.g. Sound Technology ST1700B

LEVEL METER

e.g. Sennheiser UPM550

-

Recorder

Use Universal Test Cassette CrO2 SBC419 4822 397 30069

or Universal Test Cassette

LF Generator

e.g. PM5110

Fe SBC420 4822 397 30071

DUT

L

R

S/N and distortion met

e.g. Sound Technology ST170

LEVEL METER

e.g. Sennheiser UPM550

with FF-filter

SERVICE AIDS

1-4

GB

All ICs and many other semi-conductors are
susceptible to electrostatic discharges (ESD).
Careless handling during repair can reduce life
drastically.
When repairing, make sure that you are
connected with the same potential as the mass
of the set via a wrist wrap with resistance.
Keep components and tools also at this
potential.

WARNING

GB

Safety regulations require that the set be restored to its original
condition and that parts which are identical with those specified,
be used

Safety components are marked by the symbol

!

.

ESD

CLASS 1

LASER PRODUCT

Lead free

INSTRUCTIONS ON CD PLAYABILITY

Customer complaint

"CD related problem"

Set remains closed!

check playability

1

1-

playability

ok ?

Y

Play a CD

for at least 10 minutes

check playability

playability

ok ?

Y

N

"fast" lens cleaning

check playability

playability

ok ?

N

3

N

Y

For flap loaders (= access to CD drive possible)
cleaning method

4 is recommended

add Info for customer

"SET OK"

2

return set

1 - 4 For description - see following pages

Exchange CDM

INSTRUCTIONS ON CD PLAYABILITY

1-

1

PLAYABILITY CHECK

For sets which are compatible with CD-RW discs

use CD-RW Printed Audio Disc ....................7104 099 96611

TR 3 (Fingerprint)
TR 8 (600μ Black dot) maximum at 01:00

• playback of these two tracks without audible disturbance
playing time for: Fingerprint t10seconds

Black dot from 00:50 to 01:10

• jump forward/backward (search) within a reasonable time

For all other sets

use CD-DA SBC 444A..................................4822 397 30245

TR 14 (600μ Black dot) maximum at 01:15
TR 19 (Fingerprint)
TR 10 (1000μ wedge)

• playback of all these tracks without audible disturbance
playing time for: 1000μ wedge t10seconds

Fingerprint t10seconds
Black dot from 01:05 to 01:25

• jump forward/backward (search) within a reasonable time

4

LIQUID LENS CLEANING

Before touching the lens it is advised to clean the
surface of the lens by blowing clean air over it.
This to avoid that little particles make scratches on
the lens.

Because the material of the lens is synthetic and coated
with a special anti-reflectivity layer, cleaning must be done
with a non-aggressive cleaning fluid. It is advised to use
“Cleaning Solvent

The actuator is a very precise mechanical component and
may not be damaged in order to guarantee its full function.
Clean the lens gently (don’t press too hard) with a soft and
clean cotton bud moistened with the special lens cleaner.

The direction of cleaning must be in the way as indicated in
the picture below.

2

CUSTOMER INFORMATION

It is proposed to add an addendum sheet to the set which
informs the customer that the set has been checked
carefully - but no fault was found.
The problem was obviously caused by a scratched, dirty or
copy-protected CD. In case problems remain, the customer
is requested to contact the workshop directly.
The lens cleaning (method 3) should be mentioned in the
addendum sheet.

The final wording in national language as well as the printing
is under responsibility of the Regional Service Organizations.

Software Version Check & Upgrade

Upgrade software

1.Download the software from Philips support website:

http://www.philips.com/support

2. Load the CD Disc or USB device with software,Software upgrade procedure
starts automatically

2-1

VFD Display:

LOADING

Upgrading

Waiting a minute

Door Open

Software upgrade finish.

Software version and date check

OR

TV Screen Display:

Software Upgrade

Erasure and Upgrade

OK Cancel

Software Upgrade

Upgrading

Please don’t remove the player power

Waiting a minute

Door Open

Software upgrade finish.

1, In the absence of USB/DISC state or STOP status, press the
“SYSTEM/MENU” on remote control, TV Screen Display:

Select

√

OK

Version Information

OK

BE VER: MCD122/xx Vxx yyyy.mm.dd
FE VER: DE4-MAIN.FE.ASA.01.8B.37
DSP VER: DSP.01

CE VER: ZRXF2.yymmdd
RegionCode: x
MCU VER: Vxx yyyymmdd

Malfunction Follow Check Chart

2-2

2-2

No power

Check if the Power Cord
is connected

Y

Check the AC
outlet

No

Y

Check if the Dc output
provided voltage
(about 34.5V)

Y

Check if the Main
Board has provided
voltage

Replace a new
AC Cable

Replace a new

No

Power Board

Replace a new

No

one

No sound

Adjust the volume

Y

Check if the speakers
are connected correctly

Y

Check if the USB or other
devices are connected

Y

Check if the USB or other
devices are incompatible

Y

Check if there is voltage
supplied to the USB Board

No

Time/Clock does not work

Plug in the power cord

Switch on the Timer

Reset the Time/Clock

Replace a
new one

No display

Check the files or folders in
USB or others devices has
not exceeded the certain limit

Check the data wire which
connected the Main Board,
if has provided voltage

Check if the VFD Board
has provided voltage

Check if the Main Board
has provided voltage

Replace the IC PT6311

No

/SC16311/CD16311

No

Replace a new one

Y

Check if the CPU IC
has provided voltage

Replace the

No

Main Board

Check if the CPU IC
has provided voltage

No

Replace the
Main Board