KE-MR42M1, KE-MR50M1 - Sony TV Service Manual (repair manual)

Chinese Model

KE-MR42M1/MR50M1 (Common Items)

KE-MR42M1 only

Power Requirement: 220 V AC; 50 Hz
Power Consumption: 27 W
Standby Power Consumption: 0.6 W (power switch off)
Dimensions (w x h x d): 

Approx. 430 x 105 x 360 mm

Weight:

Approx. 6 kg

Display Unit (PDM-4200)
Power Requirement: 100-240V AC; 50/60 Hz
Screen Size: 42inches 

Approx. 107 cm measured 
diagonally

Display Resolution:

1024 dots (horizontal) x 768 lines 
(vertical)

Power Consumption: 460 W
Standby Power Consumption: 0.6W
Dimensions (w x h x d):

Approx. 1,352 x 720 x 102 mm

Weight:

Approx. 39 kg

Panel System:
Plasma Display Panel

TV system: 
D/K, B/G, I

Colour system:
PAL, NTSC, SECAM

Aerial:
75 ohm external terminal for VHF/UHF

Channel Coverage:
VHF: C1-C12
UHF: C13-C57
CATV: Z1-Z39

KE-MR50M1 only

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

MBT-MR1C

PDM-4200/5000

KE-MR42/50M1(CH)

2

Rear Terminals:

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

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

5

5

5

5

5

5

5

5

1

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
video input (phono jack):
1 Vp-p, 75-ohms unbalanced, sync 
negative
audio input (phono jacks):
500 m Vrms (100% modulation), 
Impedance: 47 kilo ohms

2

video input (phono jack):
1 Vp-p, 75-ohms unbalanced, sync 
negative
audio input (phono jacks):
500 m Vrms (100% modulation), 
Impedance: 47 kilo ohms

3

video input (phono jack):
1 Vp-p, 75-ohms unbalanced, sync 
negative
audio input (phono jacks):
500 m Vrms (100% modulation), 
Impedance: 47 kilo ohms

4

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

audio input (phono jacks)
500 m Vrms (100% modulation), 
Impedance: 47 kilo ohms

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
video input (phono jack):
1 Vp-p, 75-ohms unbalanced, sync 
negative
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 Controller (RM-972)
• Two size AAA batteries (R03 type)
• One Display Interface Cable
• One Coaxial Cable
• One AV Mouse

i 

• One Cleaning cloth 
• One Mains plug holder

Other features:
• Sleep Timer

PC Input Timing:
Input signal frequency
Horizontal:  15.6 - 90 kHz
Vertical:

 48 - 85 Hz

Maximum Resolution: 1600 dots x 1200 lines

KE-MR42/50M1(CH)

3

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             The both White and Black interface cables are not connected 
                                connection                          with the MEDIABOX.
                               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-MR42/50M1(CH)

4

1. DISASSEMBLY .............................................................

1-1

1-1. Display Unit (PDM-4200/5000) .............................................

1-1

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-MR1C) .......................................

1-7

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

2. ADJUSTMENTS ............................................................

2-1

2-1. Readjustment of A/D Converter and Video Coder

Calibration (MBT-MR1C) ......................................................

2-1

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 (PAL 60)

System ........................................................................

2-3

2-1-7. AD Adjustment of YC Video (NTSC)

System ........................................................................

2-4

2-1-8. AD Adjustment of YC Video (PAL)

System ........................................................................

2-5

2-1-9. AD Adjustment of YC Video (PAL 60)

System ........................................................................

2-5

2-1-10. AD Adjustment of Component (15k)

System ........................................................................

2-6

2-2. VS, VD Voltage Adjustment (PDM-4200/5000) ....................

2-7

2-3. White Balance Adjustment (PDM-4200/5000) .......................

2-8

3. TROUBLESHOOTING .................................................

3-1

3-1. Display Unit (PDM-4200/5000) ..............................................

3-1

3-2. Media Receiver Unit (MBT-MR1C) .......................................

3-2