KE-50MR1 - Sony TV Service Manual (repair manual)

Model
KE-50MR1
Pages
127
Size
13.1 MB
Type
PDF
Document
Service Manual
Brand
Device
TV
File
ke-50mr1.pdf
Date

View Sony KE-50MR1 Service Manual online

SERVICE MANUAL
SPECIFICATIONS
KE-50MR1
FLAT PANEL COLOR TELEVISION
AEP Model
Media Receiver Unit (MBT-MR1)
Power Requirement: 220-240V AC; 50/60 Hz
Power Consumption: 27 W
Standby Power Consumption: 0.6 W
Dimensions (w x h x d): 
Approx. 430 x 105 x 360 mm
Weight:
Approx. 6 kg
Display Unit (PDM-5000)
Power Requirement: 100-240V AC; 50/60 Hz
Screen Size: 50inches 
Approx. 127 cm measured 
diagonally
Display Resolution: 
1365 dots (horizontal) x 768 lines 
(vertical)
Power Consumption: 540W
Standby Power Consumption: 0.6W
Dimensions (w x h x d): 
Approx. 1,573 x 856 x 108 mm
Weight: 
Approx. 53 kg
Panel System:
Plasma Display Panel
TV system: 
Depending on your country selection: 
B/G/H, D/K, L, I 
Colour system:
PAL, SECAM 
NTSC 3.58, 4.43 (only Video In)
Aerial:
75 ohm external terminal for VHF/UHF
Channel Coverage:
VHF: E2-E12
UHF: E21-E69
CATV: S1-S20
HYPER: S21-S41
D/K: R1-R12, 
R21-R69
L: 
F2-F10, B-Q, F21-F69
I: UHF 
B21-B69
Rear Terminals:
1/
21-pin Scart connector (CENELEC 
standard) including audio/video input, 
RGB input, TV audio/video output.
2/
21-pin Scart connector (CENELEC 
standard) including audio/video input, 
RGB input, TV audio/video output.
3/
 (SMARTLINK; selectable) 
21-pin Scart connector (CENELEC 
standard) including audio/video input, S 
video input, selectable audio/video 
output and Smartlink interface.
4/
 (SMARTLINK; selectable)
21-pin Scart connector (CENELEC 
standard) including audio/video 
input, RGB input, selectable audio/
video output, and Smartlink interface.
5
Y:
1 Vp-p, 75 ohms, 0.3V negative sync
P
B
: 0.7 Vp-p, 75 ohms
P
R
: 0.7 Vp-p, 75 ohms
5
audio input (phono jacks)
500 m Vrms (100% modulation), 
Impedance: 47 kilo ohms
SUB WOOFER: phono jack
: audio outputs (Left/Right) - phono jacks
 CENTRE SPEAKER IN:
 Max. 180W (6-ohms)
CTRL S: minijack
AV MOUSE: minijack
S
5
5
5
5
5
5
5
5
KE-50MR1(AEP)
2
Front Terminals:
6
S video input (4-pin mini DIN):
Y: 1 Vp-p, 75-ohms unbalanced, sync 
negative
C: 0.286 Vp-p (Burst signal), 75 ohms
6
video input (phono jack):
1 Vp-p, 75-ohms unbalanced, sync 
negative
6
audio input (phono jacks):
500 m Vrms (100% modulation), 
Impedance: 47 kilo ohms
 headphones jack
PC
PC Input (15-Dsub)
G: 0.7 Vp-p, 75 ohms, non Sync on Green
B:
0.7 Vp-p, 75 ohms, non Sync on Green
R:
0.7 Vp-p, 75 ohms, non Sync on Green
HD:1-5 Vp-p
VD: 1-5 Vp-p
PC
PC audio input: minijack
 Memory Stick Slot
Sound Output:
15W x 2
Accessories supplied:
• One Remote Control (RM-972)
• Two size AAA batteries (R03 type)
• One Display Interface Cable
• One Coaxial Cable
• One AV Mouse
• Two Mains Leads (Type C-4)
• Two Mains Leads (Type BF)
• Two Mains Leads (Type C-5)
Main leads Type BF and Type C-5 
may not be supplied depending on 
the country.
• One Cleaning cloth 
• One Mains plug holder
S
Other features:
• Teletext, Fastext, TOPtext
• Sleep Timer
• Smartlink (direct link between your TV set 
and a compatible VCR. For more 
information on Smartlink, please refer to the 
Instruction Manual of your VCR).
It's available either 
3 or 
4. 
(Selectable)
• TV system Autodetection
• Auto Format
PC Input Timing:
Input signal frequency
Horizontal:  15.6 - 90 kHz
Vertical:
 48 - 85 Hz
Maximum Resolution: 1600 dots x 1200 lines
KE-50MR1(AEP)
3
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” indication is 0.75 V, so
analog meters must have an accurate low-voltage scale. The Simpson 250
and Sanwa SH-63Trd are examples of a passive VOMs that are suitable.
Nearly all battery operated digital multimeters that have a 2 V AC range
are suitable.  (See Fig. A)
After correcting the original service problem, perform the following safety
checks before releasing the set to the customer:
1. Check the area of your repair for unsoldered or poorly-soldered
connections. Check the entire board surface for solder splashes and
bridges.
2. Check the interboard wiring to ensure that no wires are “pinched” or
contact high-wattage resistors.
3. Check that all control knobs, shields, covers, ground straps, and
mounting hardware have been replaced. Be absolutely certain that you
have replaced all the insulators.
4. Look for unauthorized replacement parts, particularly transistors, that
were installed during a previous repair. Point them out to the customer
and recommend their replacement.
5. Look for parts which, though functioning, show obvious signs of
deterioration. Point them out to the customer and recommend their
replacement.
6. Check the line cords for cracks and abrasion. Recommend the
replacement of any such line cord to the customer.
7. Check the B+ and HV to see if they are specified values. Make sure your
instruments are accurate; be suspicious of your HV meter if sets always
have low HV.
8. Check the antenna terminals, metal trim, “metallized” knobs, screws, and
all other exposed metal parts for AC Leakage. Check leakage as
described right.
Fig. A. Using an AC voltmeter to check AC leakage.
1.5 k
0.15 
µ
F
AC
Voltmeter
(0.75 V)
To Exposed Metal
Parts on Set
Earth Ground
SAFETY  CHECK-OUT
KE-50MR1(AEP)
4
AVERTISSEMENT!!
ATTENTION AUX COMPOSANTS RELATIFS À LA SÉCURITÉ!!
LES COMPOSANTS IDENTIFIÉS PAR UNE TRAME ET UNE
MARQUE 
!
 SONT CRITIQUES POUR LA SÉCURITÉ. NE LES
REMPLACER QUE PAR UNE PIÈCE PORTANT LE NUMÉRO
SPECIFIÉ. LES RÉGLAGES DE CIRCUIT DONT L’IMPORTANCE EST
CRITIQUE POUR LA SÉCURITÉ DU FONCTIONNEMENT SONT
IDENTIFIÉS DANS LE PRÉSENT MANUEL.  SUIVRE CES
PROCÉDURES LORS DE CHAQUE REMPLACEMENT DE
COMPOSANTS CRITIQUES, OU LORSQU’UN MAUVAIS
FONCTIONNEMENT EST SUSPECTÉ.
WARNING!!
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY SHADING AND MARK 
!
  ON THE
SCHEMATIC DIAGRAMS, EXPLODED VIEWS AND IN THE
PARTS LIST ARE CRITICAL FOR SAFE OPERATION. REPLACE
THESE COMPONENTS WITH SONY PARTS WHOSE PART
NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN
SUPPLEMENTS PUBLISHED BY SONY. CIRCUIT ADJUST-
MENTS THAT ARE CRITICAL FOR SAFE OPERATION ARE
IDENTIFIED IN THIS MANUAL. FOLLOW THESE PROCEDURES
WHENEVER CRITICAL COMPONENTS ARE REPLACED OR IM-
PROPER OPERATION IS SUSPECTED.
KE-50MR1(AEP)
5
DIAGNOSIS 
(Reliability Self Diagnostic Display Specifications for MEDIA RECEIVER)
The abnormal conditions are indicated by the following LED flashes.
       LED                        Status                        MEDIABOX                             PANEL
POWER/STBY   • 
⇔ 
• 
flashes alternately
             
-
                      
PANEL ALARM 
                                                                                                               (Not available for re-start)                            
                               Flashes (1Hz)                                -                        Defective for cable connection
                             
Flashes four times                         -                        Defective for power voltage of fan, 
                                                                                                               fan protection
                             
Flashes six times                +3.3V malfunction      Power protection on G board detected
                             
Flashes nine times              PANEL malfunction                         -
TIMER 
                 Flashes (1Hz)                     Defective for cable                           -     
                                                                           connection 
This unit has the following self diagnostic function. Refer to this table to 
 identify a defective point in case of any malfunction. 
                   
Problem   
                                                                            
Symptom
Mediabox
             Digital 3.3V malfunction   Shut down when Digital 3.3V becomes equal or under 0V. 
                              Defective for cable             The both White and Black interface cables are not connected
                               connection                           with the panel.
Panel 
                    PANEL ALARM
                               Defective for cable
                               connection                          The both White and Black interface cables are not connected 
                                                                           with the panel.
                             Fan malfunction
                              Power protector operation
*Operation count is based on WDT.
*For flashes, the Power/Standby LED flashes in red.
*The flash period is based on the reliability standard.
KE-50MR1(AEP)
6
1. DISASSEMBLY
1-1. Display Unit (PDM-5000)
1-1-1.Rear Cover Removal ...................................
1-1
1-1-2.K and F Boards Removal ............................
1-2
1-1-3.P Board Removal ........................................
1-3
1-1-4.G and F2 Boards Removal ..........................
1-4
1-1-5.R1 Board Removal ......................................
1-5
1-1-6.R2 Board Removal ......................................
1-6
1-2. Media Receiver Unit (MBT-MR1)
1-2-1.Panel and Covers Removal..........................
1-7
1-2-2.G2, A, and MS Boards Removal ................
1-8
1-2-3.TU Board Removal .....................................
1-9
1-2-4.U Board Removal .......................................
1-10
1-2-5.H2 Board Removal ......................................
1-11
1-2-6.H5 Board Removal .....................................
1-12
1-2-7.MSX Board Removal ..................................
1-13
1-2-8.H1 Board Removal .....................................
1-14
1-2-9.H4 Board Removal ......................................
1-15
TABLE  OF  CONTENTS
Section
Title
Page
Section
Title
Page
2. ADJUSTMENTS
2-1. Readjustment of A/D Converter and Video Coder
Calibration
2-1-1.Adjustment preparation ...............................
2-1
2-1-2.AD Adjustment of RGB System .................
2-1
2-1-3.AD Adjustment of Component(other 15k)
          System .........................................................
2-1
2-1-4.AD Adjustment of CVBS Video(NTSC)
          System .........................................................
2-2
2-1-5.AD Adjustment of CVBS Video(PAL)
          System .........................................................
2-3
2-1-6.AD Adjustment of CVBS Video(SECAM)
          System .........................................................
2-3
2-1-7.AD Adjustment of CVBS Video(PAL 60)
          System .........................................................
2-4
2-1-8.AD Adjustment of CVBS Video(NTSC 4.43)
          System .........................................................
2-5
2-1-9.AD Adjustment of Video(YC) System........
2-6
2-1-10.AD Adjustment of Component(15k)
           System ........................................................
2-6
KE-50MR1(AEP)
7
Section
Title
Page
Section
Title
Page
2-1-11.AD Adjustment of RGB 15k System ........
2-6
3. DIAGRAMS
3-1. Block Diagrams
3-1-1.Display Unit(PDM-5000) ............................
3-1
3-1-2.Media Receiver Unit (MBT-MR1) .............
3-6
3-2. Circuit B0ards Location
3-2-1.Display Unit(PDM-5000) ............................
3-15
3-2-2.Media Receiver Unit (MBT-MR1) ..............
3-16
3-3. Schematic Diagrams and Printed WiringBoards
3-3-1.Display Unit(PDM-5000) ............................
3-17
(1)Schematic Diagrams of F Board .....................
3-18
(2)Schematic Diagram of F2 Board .....................
3-19
(3)Schematic Diagrams of G Board .....................
3-20
(4)Schematic Diagram of K Board ......................
3-24
(5)Schematic Diagrams of P Board .....................
3-26
(6)Schematic Diagrams of R1 amd R2 Boards ....
3-31
3-3-2.Media Receiver Unit (MBT-MR1) .....................
3-32
(1)Schematic Diagrams of A Board .....................
3-32
(2)Schematic Diagram of G2 Board ....................
3-45
(3)Schematic Diagrams of H1 Board ...................
3-47
(4)Schematic Diagram of H2 Board ....................
3-49
(5)Schematic Diagrams of H4 and H5 Boards .....
3-51
(6)Schematic Diagrams of MS Board ..................
3-52
(7)Schematic Diagram of MSX Board .................
3-56
(8)Schematic Diagrams of TU Board ..................
3-57
(9)Schematic Diagrams of U Board .....................
3-60
3-4. Semiconductor ......................................................
3-63
4. EXPLODED  VIEWS
..............................................
4-1
4-1. Display Unit (PDM-5000) ...................................
4-2
4-2. Media Receiver Unit (MBT-MR1) ......................
4-4
4-3. Packing Materials for Display Unit (PDM-5000) ....
4-6
4-4. Packing Materials for Media Receiver Unit
 (MBT-MR1) ........................................................
4-7
5. ELECTRICAL  PARTS  LIST
...............................
5-1
KE-50MR1(AEP)
1-1
SECTION  1
DISASSEMBLY
1-1. PANEL UNIT (PDM-5000)
1-1-1. REAR COVER REMOVAL
4
 Rear cover assy
1
 Eight screws
     (+PSW 5X16)
2
 Three screws
     (+PSW 3X8)
3
 Ten screws
     (+BVTP 4X16)
3
 Ten screws
     (+BVTP 4X16)
1
KE-50MR1(AEP)
1-2
1-1-2. K AND F BOARDS REMOVAL
3
 Four screws
     (+PSW 3X8)
1
 Two screws
     (+PSW 3X8)
2
 F Board
4
 K Board
KE-50MR1(AEP)
1-3
1-1-3. P BOARD REMOVAL
2
 Four screws
     (+PSW 3X8)
3
 P Board
1
 Four Connector screws

Download Sony KE-50MR1 Service Manual (Repair Manual)

Here you can view online and download Sony KE-50MR1 Service Manual in PDF. KE-50MR1 service manual will guide through the process and help you recover, restore, fix, disassemble and repair Sony KE-50MR1 TV. Information contained in service manuals typically includes schematics / circuit diagrams, wiring diagrams, block diagrams, printed wiring boards, exploded views, parts list, disassembly / assembly, pcb.