KV-BT21M40 - Sony TV Service Manual (repair manual)

kv-bt21m40 service manual
Model
KV-BT21M40
Pages
127
Size
12.84 MB
Type
PDF
Document
Service Manual
Brand
Device
TV
File
kv-bt21m40.pdf
Date

Read Sony KV-BT21M40 Service Manual online

MODEL
COMMANDER DEST. CHASSIS NO.
CHASSIS
TRINITRON 
®
 
COLOR TV
SERVICE MANUAL
BX1S
MODEL
COMMANDER   DEST.
CHASSIS NO.
KV-BT21M40 
RM-W101 E SCC-U98A-A
KV-BT21P52
RM-W101 Thailand
SCC-U94F-A
KV-BT21P52/L
RM-W101 Thailand
SCC-U94G-A
(BLUE)
KV-BT21P52/N
RM-W101 Thailand
SCC-U94H-A
(CHAMPAGNE GOLD)
– 2 –
KV-BT21M40/BT21P52/BT21P52/L/BT21P52/N
RM-W101
Note
Power requirements
110-240 V AC, 50/60 Hz
KV-BT21M40
220-240 V AC, 50/60 Hz
except KV-BT21M40
Power consumption (W) Indicated on the rear of the TV
Television system
B/G, I, D/K, M
KV-BT21M40
B/G
except KV-BT21M40
Color system
PAL, PAL 60, SECAM, NTSC3.58, NTSC4.43
KV-BT21M40
PAL, PAL 60, NTSC3.58 (AV IN), NTSC4.43
except KV-BT21M40
Stereo/Bilingual system
A2 Bilingual B/G
except KV-BT21M40
Channel coverage
B/G
VHF: E2 to E12 / UHF: E21 to E69
CATV: S01 to S03, S1 to S41
I
UHF: B21 to B68
KV-BT21M40 only
CATV: S01 to S03, S1 to S41
D/K
VHF: C1 to C12, R1 to R12 / UHF: C13 to C57, R21 to R60 /
KV-BT21M40 only
CATV: S01 to S03, S1 to S41, Z1 to Z39
M
VHF: A2 to A13 / UHF: A14 to A79 /
KV-BT21M40 only
CATV: A-8 to A-2, A to W+4, W+6 to W+84
8
 (Antenna)
75-ohm external terminal
Audio output (Speaker)
3W + 3W
Number of terminal
D Video
Input: 2
Output: 1
Phono jacks; 1 V
P-P
, 75 ohms
 Audio
Input: 2
Output: 1
Phono jacks; 500 mVrms
2 (Headphone)
Output: 1
Stereo minijack
Picture tube
21 in.
Tube size (cm)
54
Measured diagonally
Screen size (cm)
51
Measured diagonally
Dimension (w/h/d, mm)
497 x 461 x 487
Mass (kg)
23
Design and specifications are subject to change without notice.
SPECIFICATIONS
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.
– 3 –
KV-BT21M40/BT21P52/BT21P52/L/BT21P52/N
RM-W101
TABLE OF CONTENTS
SELF DIAGNOSTIC FUNCTION .............................. 4
1. DISASSEMBLY
1-1. Rear Cover Removal ................................................. 7
1-2. Speaker Removal ...................................................... 7
1-3. Chassis Assy Removal .............................................. 7
1-4. Service Position ........................................................ 7
1-5. Terminal Bracket Removal ....................................... 7
1-6. A Board Removal ...................................................... 7
1-7. Picture Tube Removal ............................................... 8
2. SET-UP ADJUSTMENTS
2-1. Beam Landing ........................................................... 9
2-2. Convergence ............................................................ 10
2-3. Focus Adjustment .................................................... 12
2-4. G2 (SCREEN) Adjustments ................................... 12
2-5 White Balance Adjustment ..................................... 12
2-6 Sub Bright Adjustment ........................................... 12
3. CIRCUIT ADJUSTMENTS
3-1. Adjustment With Commander ................................ 13
3-2. Adjustment Method ................................................ 14
3-3. Picture Quality Adjustment .................................... 28
3-4. Deflection Adjustment ............................................ 28
3-5. Drive Adjustment .................................................... 29
3-6. Picture Distortion Adjustment ................................ 30
Section
Title
Page
Section
Title
Page
4. DIAGRAMS
4-1. Block Diagram ........................................................ 31
4-2. Circuit Boards Location .......................................... 32
4-3. Schematic Diagram ................................................. 32
4-3-1. C Board Schematic Diagram ....................... 33
4-3-2. A Board — Processer (Block A) ................. 34
4-3-3. A Board — Audio (Block B) ....................... 36
4-3-4. A Board — Power Supply (Block C) .......... 38
4-3-5. A Board — Deflection (Block D) ................ 40
4-3-6. A Board — Tuner (Block E) ........................ 42
4-3-7. A Board — Jack (Block F) .......................... 44
4-4. Voltage Measurement and Waveforms ................... 49
4-5. Printed Wiring Boards and Parts Location ............. 52
4-6. Semiconductors ....................................................... 55
5. EXPLODED VIEWS
5-1. Chassis ..................................................................... 57
6. ELECTRICAL PARTS LIST .................................... 58
OPERATING INSTRUCTION
– 4 –
KV-BT21M40/BT21P52/BT21P52/L/BT21P52/N
RM-W101
The units in this manual contain a self diagnostic function. If an error occurs, the STANDBY (1) indicator will automatically
begin to flash. A description of the self-diagnosis function is explained in the instruction manual. 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 occured if the screen displays a “0”.
*
If a +B overcurrent is detected, stoppage of the vertical deflection is detected simultaneously. The symptom that is
diagnosed first by the mirco controller is displayed on the screen.
** Refer to Screen (G2) Adjustment in this manual.
SELF DIAGNOSTIC FUNCTION
Diagnosis
Item
Description
Power does
not turn on
+B overcurrent
(OCP)*
V-Protect
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
Self-Diagnostic
display/
Diagnosis result
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 come on.
• No power is supplied on
TV.
• AC Power supply is faulty.
• Power does not come 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.
Page of 127
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Here you can read online and download Sony KV-BT21M40 Service Manual in PDF. KV-BT21M40 service manual will guide through the process and help you recover, restore, fix, disassemble and repair Sony KV-BT21M40 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.