Mastercare MATSUI 25N03 User manual

ThisManualisonlyavailableinElectronicformat.
SERVICEMANUAL
MATSUI25/28N03
TV
Version 1.0
Mastercare,MaylandsAvenue,HemelHempstead,Hertfordshire,HP27TG

MATSUI25/28N03
TV
PRODUCEDBY
MASTERCARETECHNICALCENTRE
SERVICE MANUAL
Specificationsaresubjecttochange withoutnotice.
COPYRIGHT©2000 MASTERCARELIMITED

Professional 4400 Chassis service procedure
Power module
Use PP1 to select 154V ± 0.5V for 4:3 tubes and 151V ± 0.5V for 16:9 tubes at the CP28
terminals.
Activating service mode
1. Switch on the appliance while holding down the MENU key at the cabinet controls
until the red LED lights up.
2. Release the MENU button at the cabinet and press the standby button on the remote
control; the appliance will default to programme 1 or to AV1 if pin 8 of SCART 1 is
connected to a voltage of +12 V. It is therefore important to make certain that the test
signal needed to make the adjustments is available either on programme 1 or on the
SCART 1 input, as selection of the sources is not possible thereafter in service mode.
3. The functions that can be adjusted (listed below) are selected using the P+ and P-
buttons of the remote control and the adjustments then made with the Volume ± buttons. It
is advisable to make a note of initial values before making any changes so that these can
be restored if necessary.
In the event of replacing the NVM memory or the microprocessor, it is essential to make
all the adjustments accessible in service mode, since the replacement memory is
supplied without any prior programming and a new microprocessor requires a new
initialization.
Option bytes (Opx)
The correct values to set for each appliance are given on the label at the back cover alongside the
letters Op1, Op2, Op3.
Initialization (INIT CTV 831 x.x)
The initialization procedure, which also indicates the software version for the microprocessor, is
enabled with the Volume + button and must be carried out whenever the NVM memory or
the microprocessor is replaced. Bear in mind that initialization has the effect of erasing
all data from the memory except for the bytes option.
Control bytes (Cox)
These are control registers that must be set as follows:
Co2 96
Co3 27
Co4 00
Screen grid voltage (Vg2 Test)
Having selected the function, press the Volume+ button: a luminous horizontal line appears in the
middle of the screen. Adjust potentiometer G2 on the EHT transformer so that the line is just
visible (in a dimly lit room). Then press Volume- and wait for a few seconds until service mode is
restored.
IF video setting (Ifxx AFCxx)
This adjustment requires special equipment and will be needed only for the ICC2 N1 version, which
is also recognizable by the presence of the LC7 coil. If the coil is present, adjust IF and IFP to the
values given on the label affixed to the left side of main PCB so that a suitable approximation is
achieved.
If the coil is not present, adjust as follows:
IF 50

IFP 50 (this item is accessible for multistandard appliancesonly, provided that a
France/AM/VHF-L mode signal is memorized in the programme 1 position).
AGC tuner setting (AG)
With a signal of 1 mV applied to the aerial input on a UHF channel, adjust to 4 Vdc at pin 1 of the
tuner.
Setting the luminance/chrominance delay (Yx)
The delay must be adjusted to the following values:
Yp 18 (PAL)
Ys 30 (SECAM)
Yn 20 (NTSC)
Yo 22 (SCART)
The Yn function is only accessible if the signal is NTSC coded (standard accepted only by
SCART).
Audio stereo A2 decoder (SA/LA)
The SA and LA functions allow adjustment of the separation between the right and left audio
channels and of the respective levels. An RF stereo generator is therefore required. Disconnect
modulation to the left hand channel and adjust LA to give 1.4 Vpp at pin 1 of the SCART 1
connector. Then adjust SA for the minimum residual signal at pin 3 of SCART 1. If a stereo
generator is not available, set LA to 01 and SA to 0B to obtain a fair approximation.
Horizontal geometry (HSH/EW/PW/CP/TC)
There are two groups of these functions, one for 4:3 format (suffix 4) and one for 16:9 format (suffix
16), both of which must be adjusted because they are used in the zoom function (4:3 tubes
included). The functions of the single parameters are as follows:
HSH Horizontal shift
EW Horizontal amplitude
PW Parabola correction
CP Corner parabola correction
TC Trapezium correction
In the case of 4:3 format picture tubes, enter EW16 = 3F to ensure proper zooming.
Vertical geometry (VS/VA/VSH/SC)
Vertical geometry is adjusted starting with the VS (vertical slope) function, which is set so that the
central horizontal line of the test signal is exactly at the boundary between the visible image and
the black part below and must not then be changed again. The functions of the single
parameters are as follows:
VS Vertical slope
VA Vertical amplitude
VSH Vertical shift
SC Vertical S-correction (linearity)
White control (WB/WG/WR)
Using a black and white bar signal, adjust to obtain a grey image.
On screen (OSD)
Load the fixed value 3F.
Deactivating service mode
Once all the necessary adjustments have been made, press TV or MENU OFF on the remote
control to save all the changes and return the appliance to normal operating mode.

Matsui 25/28N03
Circuit Ref.
Description
Part Number
MAIN PCB 4400 4:3
S000530660
CRT PCB
S000674400
RGB PCB
S000674420
MANUAL CONTROLS PCB
S000800280
DOOR
S000848100
ICR1
I.C. SAA5297PS/262 3.0
S020010000
CP1/CP3
CAP 220NF 250V
S030242200
CV10
CAP 10NF 1000V
S035931010
CV8
CAP 2.2MF 250V
S040590220
CL12
CAP 4.7MF 250V
S040590500
CP26
CAP 100MF 250V
S040601000
CP15
CAP 150MF 385V
S040781500
RC45
RES FUSIBLE 1 OHM
S044010100
RS22
RES FUSIBLE 4.7 OHM
S044010470
RS41
RES FUSIBLE 10 OHM
S044011000
RL8
RES FUSIBLE 15 OHM
S044011500
RL18RV19
RES FUSIBLE 33 OHM
S044013300
RV19
FISIBLE RESISTOR 33 OHM
S047033000
RR53
RES FUSIBLE 1 OHM SMD
S047501000
RR64
RES FUSIBLE 2.2 OHM SMD
S047502200
RS33
RES FUSIBLE 4.7 OHM SMD
S047504700
RS52
RES FUSIBLE 10 OHM SMD
S047510000
RF8/RF9
RES FUSIBLE 2.2 OHM
S048002200
RL15RL16
RES FUSIBLE 2K2 OHM
S048222000
RP1
RES 1 MOHM VR37 SAFTEY
S053051000
RP21
RES 4M7 OHM VR68 SAFTEY
S053210700
RL19
RES 27 OHM 3W WIRE WOUND
S053910270
RP19
RES .15 OHM 3W WIRE WOUND
S054000150
RP2
RES 68 KOHM 2W
S054368000
RP16
RES 27 KOHM 9W WIRE WOUND
S055492270
RP22
RES 8K2 OHM 11W W/WOUND
S055510820
NTC1
RES NTC 4.7 OHM
S056590200
PTC1
PTC RESISTOR 20A
S056591900
C.R.T. A59EHJ43X31
S060325210
DP16
DIODE BAV103-GS18
S061281050
DP8
DIODE BA159
S061284610
DP9
DIODE BA159
S061284610
DP10
DIODE BA159
S061284610
DP15
DIODE BA159
S061284610
DS1
DIODE BB 405B, 153
S061296500
DP11
DIODE BYT11-1000
S061299000
DP13
DIODE BYW29/200
S061300500
DP5
DIODE BYW95B
S061302400
DP6
DIODE BYW95B
S061302400
DP7
DIODE BYW95B
S061302400
DP14
DIODE BYW95B
S061302400
DP12
PTC RESISTOR 20A
S061302600
DL4
DIODE BYW96D
S061303200
DL5
DIODE BY228
S061316870
DL6
DIODE BYD33J
S061401330
DC2/DC3
DIODE BA792/T1
S061517920
ZP2/ZP3
ZENER DIODE 6V2
S061706200

ZL3
ZENER DIODE 6V8
S061706800
ZL1/ZL2
ZENER DIODE 8V2
S061708200
ZC1
ZENER DIODE 13V
S061711300
ZF2
ZENER DIODE BZV85C30
S061961670
ZL4
ZENER DIODE 6V8
S061971610
ZC1
ZENER DIODE 13V
S061972050
ZF1
ZENER DIODE 51V
S061972300
LED DIODE RED/GREEN
S062000400
TL3
TRANSISTOR BC635-16
S062520300
TL1
TRANSISTOR BD441
S062531000
TR11
TRANSISTOR BSV52,215
S062620000
TV9
TRANSISTOR BF871
S062740860
TL4
S062756100
S062756100
TP2
S062756500
S062756500
TP2
S062756600
S062756600
ICV1
S063151010
S063151010
ICP
S063164520
S063164520
ICS1
S063174950
S063174950
ICP3
S063181330
S063181330
ICF1
S063183500
S063183500
ICC2
I.C. TDA8843/N2 PAL
S063188420
ICC2
I.C. TDA8843/N1 PAL
S063188430
ICC2
I.C. TDA8844/N1 PAL/SECAM
S063188440
ICC2
I.C. TDA8844/N2 PAL SECAM
S063188450
ICS3
I.C. TDA9821-V1
S063198210
ICC1
I.C. TDA9830-V1
S063198300
ICS6
I.C. TDA9860/V2
S063198600
ZR2
I.C. ZTK 33-B`
S063241330
ICV1
I.C. STV5112
S063251120
ICR2
I.C. PCF 8594C-2P/02
S063285930
ICR3
I.C. PCF 8594C-2P/02
S063285930
ICR1
I.C. SAA5297PS/065 V.0.0
S063352970
ICR1
I.C. SAA5297PS/211 1.0
S063352980
ICR1
I.C. SAA5297PS/251 2.0
S063352990
ICS5
I.C. SAA7284 ZP/M2
S063372840
ICP2
I.C. TCDT1101 GB
S063411010
ICS4
I.C. TDA9840T/V2,118
S063598400
TRL1
FLYBACK TRANSOFRMER
S065621400
TRP1
POWER SWITCH TRANSFORMER
S065708000
LP1
MAINS FILTER
S066541700
LL1
LINE DRIVE TRANSFORMER
S066544000
QC1
QUARTZ 3.58 MHZ
S066900150
QC2
QUARTZ 4.43 MHZ
S066900250
QS2
QUARTZ 8.192 MHZ
S066900360
QS1
QUARTZ 10 MHZ
S066900400
QR1
QUARTZ 12 MHZ
S066901200
LL2
E/W/ COIL
S067071000
LL6
BRIDGE COIL
S067081000
LL3
LINEARITY COIL
S067081410
DEGAUSS COIL
S067202010
FCC1
SAW FILTER G1984M
S067316000
FCC1
SAW FILTER J1952
S067317000
FCC3
CERAMIC FILTER TPWA01B
S067400000
FCC3
CERAMIC FILTER T5.5W
S067401050
FCC4
CERAMIC FILTER SFT6.0MA
S067401080
MAINS SWITCH
S068055310

PUSCH EKPT 1105 S
S068056300
IR RECEIVER
S068149100
REMOTE CONTROL
S068244000
TUNC1
TUNER UV 1315/I
S069023000
TUNC1
TUNER UV 1315 AS
S069023100
CNV3
CRT SOCKET
S070001200
BACK COVER
S070030020
CABINET BOTTOM
S070050050
FP1
FUSE 2.5AH
S070506300
EARPHONE JACK
S071015350
SPEAKER 8 OHM
S073174000
CABINET FRONT
S078644200
MANUAL CONTROL HOLDER
S078971000
DOOR HOLDER
S082811460
DOOR PUSH-PUSH BLOCK
S082900000
MAINS SWITCH BUTTON
S083307100
CHASSIS HOLDER SIDE
S087170000
CHASSIS HOLDER FRONT
S087170500
CHASSIS REAR CONN COVER
S087174400
MAINS CABLE
S092503800