KV-BZ212M50 — Sony TV Service Manual (repair manual)

Model
KV-BZ212M50
Pages
80
Size
8.22 MB
Type
PDF
Document
Service Manual
Brand
Device
TV
File
kv-bz212m50.pdf
Date

View Sony KV-BZ212M50 Service Manual online

TRINITRON 
®
 
COLOR TV
RM-GA002
SERVICE MANUAL
BX1S
CHASSIS
MODEL
COMMANDER   DEST.
CHASSIS NO.
KV-BZ212M50
RM-GA002 East Africa
SCC-V19F-A
KV-BZ212M50
RM-GA002 GE
SCC-V44H-A
KV-BZ212M81
RM-GA002 Middle East
SCC-V40U-A
KV-BZ212M81
RM-GA002 Russia
SCC-V65A-A
KV-BZ212P42
RM-GA002 Thailand
SCC-V39U-A
MODEL
COMMANDER   DEST.
CHASSIS NO.
– 2 –
KV-BZ212M50/M81/P42
   RM-GA002
TABLE OF CONTENTS
SELF DIAGNOSTIC FUNCTION...................................... 3
1. DISASSEMBLY
1-1.
Rear Cover Removal .................................................... 5
1-2.
Speaker Removal ......................................................... 5
1-3.
Chassis Assy Removal ................................................. 5
1-4.
Service Position ........................................................... 5
1-5.
Terminal Bracket Removal .......................................... 5
1-6.
A Board Removal ........................................................ 5
1-7.
Picture Tube Removal .................................................. 6
2. SET-UP ADJUSTMENTS
2-1.
Beam Landing Adjustment .......................................... 7
2-2.
Convergence Adjustment ............................................. 7
2-3.
Focus Adjustment ........................................................ 9
2-4.
G2 (SCREEN) Adjustment .......................................... 9
2-5.
White Balance Adjustment .......................................... 9
3. CIRCUIT ADJUSTMENTS
3-1.
Adjustments With Commander ................................. 10
3-2.
Adjustment Method ................................................... 11
3-3.
Picture Quality Adjustments ...................................... 28
3-3-1. P MAX/Contrast Adjustment ......................... 28
3-3-2. Sub Color Adjustment .................................... 28
3-3-3. Sub Hue Adjustment ....................................... 28
3-3-4. Sub Bright Adjustment ................................... 28
3-4.
Geometry Adjustments .............................................. 28
3-4-1. General Setting ............................................... 28
3-4-2. Pal 50Hz Normal Mode .................................. 29
4. DIAGRAMS
4-1.
Block Diagram ........................................................... 30
4-2.
Circuit Boards Location ............................................ 31
4-3.
Schematic Diagram Information ............................... 31
4-3-1. A Board — (Block 001) .................................. 32
4-3-2. A Board — (Block 002) .................................. 34
4-3-3. A Board — (Block 003) .................................. 36
4-3-4. A Board — (Block 004) .................................. 38
4-3-5. A Board — (Block 005) .................................. 40
4-3-6. A Board — (Block 006) .................................. 42
4-3-7. A Board — (Block 007) .................................. 44
4-3-8. C Board Schematic Diagrams ........................ 45
4-4.
Voltage Measurement and Waveforms ...................... 46
4-5.
Printed Wiring Boards ............................................... 49
4-6.
Semiconductors .......................................................... 54
5. EXPLODED VIEWS
5-1.
Chassis ....................................................................... 56
6. ELECTRICAL PARTS LIST ............................................ 58
OPERATING INSTRUCTIONS
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY SHADING AND MARK 
! ON THE
SCHEMATIC DIAGRAMS, EXPLODED VIEWS AND IN THE
PARTS LIST ARE CRITICAL TO SAFE OPERATION. REPLACE
THESE COMPONENTS WITH SONY PARTS WHOSE PART
NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN
SUPPLEMENTS PUBLISHED BY SONY.
CAUTION
SHORT CIRCUIT THE ANODE OF THE PICTURE TUBE AND
THE ANODE CAP TO THE METAL CHASSIS, CRT SHIELD,
OR CARBON PAINTED ON THE CRT, AFTER REMOVING THE
ANODE.
Section
Title
Page
Section
Title
Page
– 3 –
KV-BZ212M50/M81/P42
   RM-GA002
The units in this manual contain a self diagnostic function. If an error occurs, the STANDBY (1) indicator will automatically
begin to flash. The number of times the STANDBY (1) indicator flashes translates to a probable source of the problem. If an
error symptom cannot be reproduced, the remote commander can be used to review the failure occurrence data stored in
memory to reveal past problems and how often these problems occur.
1. DIAGNOSTIC TEST  INDICATORS
When an errors occurs, the STANDBY (1) indicator will flash a set number of times to indicate the possible cause of the
problem. If there is more than one error, the indicator will identify the first of the problem areas.
Result for all of the following diagnosis items are displayed on screen. No error has occurred if the screen displays a "0".
SELF DIAGNOSTIC FUNCTION
Diagnosis
Item
Description
No Power
+B overcurrent
(OCP)
V-Protect (OVP)
IK (AKB)
Power supply
NG (+5V) for
Video Processor
No. of timer
STANDBY (1)
indicator flashes
Does not light
2 times
4 times
5 times
8 times
Diagnostic Result
on screen display
2:0
or
2:1 ~ 255
4:0
or
4:1 ~ 255
5:0
or
5:1 ~ 255
8:0
or
8:1 ~ 255
Probable Cause
Location
• Power cord is not plugged
in.
• Fuse is burned out (F600)
A board.
• H OUT (Q805) is shorted.
(A board)
• IC751 is shorted. (C board)
• +13V is not supplied.
(A board)
• IC804 is faulty. (A board)
• Video OUT (IC1545) is
faulty. (A board)
• IC001 is faulty. (A board)
• Screen (G2) is improperly
adjusted.
• IC604 faulty.
• IC602 faulty.
Detected
Symptoms
• Power does not turn on.
• No power is supplied on
TV.
• AC Power supply is faulty.
• Power does not turn on.
• Load on power line is
shorted.
• Has entered standby state
after horizontal raster.
• Vertical deflection pulse is
stopped.
• Power line is shorted or
power supply is shorted.
• No raster is generated.
• CRT Cathode current
detection reference pulse
output is small.
• No power supply to CRT
ANODE.
• No RASTER is generated.
2. STANDBY INDICATOR BLINKING PROCESS
The example above represents for 4 times blink
Lamp OFF 3 seconds 
Lamp ON 300ms
Lamp OFF 300ms
3. STANDBY INDICATOR ON TV FRONT PANEL
Standby indicator
– 4 –
KV-BZ212M50/M81/P42
   RM-GA002
[+B overcurrent $OCP%]
Occurs when an overcurrent on the +B(135V) line is detected by pin 32 of IC001 (A board).
If the voltage of pin 32 of IC001 (A board) is more than 4V, the unit will automatically go to
standby.
[V-PROTECT]
Occurs when an absence of the vertical deflection pulse is detected by pin 13 of IC001
(A board).
[IK $AKB%]
If the RGB levels* do not balance within 15 sec after the power is turned on, this error will be
detected by IC001 (A board). TV will stay on, but there will be 5 times LED blinking.
Occurs when IC001 internal HV protect detects an abnormal H-Pulse (frequency) due to
improper power supply to IC001. TV cuts off high voltage power of anode CRT. No picture will be
detected. eg: IC602, IC604 go faulty.
* (Refers to the RGB levels of the AKB detection Ref pulse that detects IK.)
POWER SUPPLY NG (+5V)
for VIDEO PROCESSOR
4. SELF DIAGNOSTIC SCREEN DISPLAY
5. HANDLING SELF DIAGNOSTIC SCREEN DISPLAY
6. SELF-DIAGNOSTIC CIRCUIT
5
8
No.
Description
Method
1.
Display self diagnostic screen
[Display] t [Channel    ] t [Volume    ] t [Power / TV]
Note: The above must be performed while TV is on standby mode.
2.
Stop standby flash
i) Turn off power switch on main.
ii) Unplug power cord from the outlet.
3.
Clear fault result
[Channel    ] t 
-
Note: Diagnostic results display on screen is not automatically cleared. Therefore,
clear result after completion of repair.
4.
Quit self diagnostic screen
Turn off power switch of remote commander or main unit.
2 OCP 
:  0
3 OVP 
:
N/A
4 VSTOP  :
1
5 AKB 
:
0
8 SUP 
:
0
101 WDT :  N/A
"0" means no fault has been detected.
"1" means a fault has been detected.
"2" means two faults have been detected.
"N/A" means not available for this models.
SELF DIAGNOSTIC
A BOARD
IC001
Y/CHROMA JUNGLE
A BOARD
IC804
V.OUT
A BOARD
IC001
SYSTEM
A BOARD
IC003
MEMORY
FROM
C BOARD
IC751 PIN 5
IK
EHTO
RED LED
DISPLAY
SDA0
V.GUARD
SDA
5
F.B-PLS
3
13
84
32
122
A BOARD
FROM
Q816
COLLECTOR
109
– 5 –
KV-BZ212M50/M81/P42
   RM-GA002
SECTION 1
DISASSEMBLY
1-2.
SPEAKER REMOVAL
1-1.
REAR COVER REMOVAL
1-4.
SERVICE POSITION
1-3.
CHASSIS ASSY REMOVAL
1-6.
A BOARD REMOVAL
1
 Seven screws
     (+BVTP 4 × 16)
2
 Rear cover
2
 Four screws
     (+P4x16)
A Board
1-5.
TERMINAL BRACKET REMOVAL
1
 One screw
 
(+BVTP 3 × 12
 
Type2 IT-3)
2
 Terminal bracket
3
 Two screw
 
(+BVTP 4 × 12
 
Type2 IT-3)

Download Sony KV-BZ212M50 Service Manual (Repair Manual)

Here you can view online or download Sony KV-BZ212M50 Service Manual in pdf. This Service Manual can help you recover, restore, fix, disassemble and repair Sony KV-BZ212M50 TV. Information contained in Sony KV-BZ212M50 service manual (repair manual) typically includes:

  • Disassembly, troubleshooting, programming, maintenance, remote, adjustment, installation and setup instructions.
  • Schematics, wiring and block diagrams.
  • Printed wiring boards (PWB) and printed circuit boards (PCB).
  • Parts list (bill of materials).