KLV-21SR2 - Sony TV Service Manual (repair manual)

klv-21sr2 service manual
Model
KLV-21SR2
Pages
74
Size
2.61 MB
Type
PDF
Document
Service Manual
Brand
Device
TV
File
klv-21sr2.pdf
Date

Read Sony KLV-21SR2 Service Manual online

SERVICE MANUAL
SPECIFICATIONS
KLV-21SR2
LCD Colour TV
AEP Model
Display Unit:
Power Requirement:
100–240 V AC, 50/60 Hz
Screen Size: 21 inches
Approx. 53.7 cm measured 
diagonally
Display Resolution:
1,024 dots (horizontal) x
 
768 lines 
(vertical)
Power Consumption:
xx W
Standby Power Consumption:
x.x W
Dimensions (w x h x d): 
Approx. 52.8 x 51.6 x 23.0 mm
(with stand)
Approx. 52.8 x 49.1 x 11.8 mm 
(without stand)
Weight: 
Approx. 10.6 kg (with stand)
Approx. 9.4 kg (without stand)
Panel Sys
tem:
LCD (Liquid Crystal Display) Panel
TV System: 
Depending on your country/region 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
 CHASSIS
AT2
KLV-21SR2 (AEP)      2
Terminals:
1/
1
21-pin Scart connector (CENELEC standard) 
including audio/video input, RGB input, and 
TV audio/video output.
2/
2 (SMARTLINK) 
21-pin Scart connector (CENELEC standard) 
including audio/video input, S video input, 
selectable audio/video output, and SmartLink 
interface.
3
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
3
Video input (phono jack):
1 Vp-p, 75 ohms unbalanced, sync negative
3
Audio input (phono jacks):
500 m Vrms (100% modulation)
Impedance: 47kilohms 
Audio output (Left/Right) (phono jacks)
i
Headphones jack
Sound Output:
Full range speaker:
x.x W   2
Woofer:
x.x W   2
Accessories Supplied
:
• Remote control
RM-Y1102 (1)
• Size AA batteries (R6 type) (2)
• Coaxial cable (1)
• Mains lead (Type C-6) (1)
• Mains lead (Type BF) (1)
The mains lead Type BF may not be 
supplied depending on the country/region.
Other Features:
• Teletext, Fastext, TOPtext
• Sleep Timer
• SmartLink (Direct link between your TV and a 
compatible VCR or DVD recorder. For more 
information on SmartLink, please refer to the 
instruction manual of your VCR or DVD 
recorder.)
• TV system autodetection
• Screen Memo
• NexTView (depending on availability of
 
service)
S
S
KLV-21SR2 (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” indica-
tion 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 fol-
lowing safety checks before releasing the set to the customer:
1. Check the area of your repair for unsoldered or poorly-sol-
dered 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 tran-
sistors, 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.
SAFETY  CHECK-OUT
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
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 AP-
PEAR AS SHOWN IN THIS MANUAL OR IN SUPPLE-
MENTS 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 IMPROPER OPERATION IS SUS-
PECTED.
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.
KLV-21SR2 (AEP)
4
TABLE OF CONTENTS
1. DISASSEMBLY ...................................... 1-1
1-1. REAR COVER AND STAND ASSY REMOVAL
1-1
1-2. REAR CABINET ASSY REMOVAL .................... 1-1
1-3. H1 BOARD REMOVAL ....................................... 1-2
1-4. D2 BOARD REMOVAL ....................................... 1-2
1-5. U1 BOARD REMOVAL ....................................... 1-3
1-6. G BOARD REMOVAL ......................................... 1-3
1-7. A AND TU BOARDS REMOVAL ........................ 1-4
1-8. B BOARD REMOVAL ......................................... 1-4
1-9. H3 BOARD REMOVAL ....................................... 1-5
1-10. H4 BOARD REMOVAL ..................................... 1-5
1-11. H2 BOARD REMOVAL ..................................... 1-6
2. ADJUSTMENTS .................................... 2-1
2-1. Adjustment of signal level. .................................. 2-1
2-1-1. Check AD calibration registration items. ........... 2-1
2-1-2. Y signal AD calibration of 2163 decode. ........... 2-1
2-1-3. C signal AD calibration of 2163 decode. ............ 2-1
2-1-4. Check AD calibration registration items. ........... 2-2
2-1-5. Y signal AD calibration of CCP2 decode. .......... 2-2
2-1-6. C signal AD calibration of CCP2 decode. .......... 2-2
2-2. White Balance Adjustment ................................. 2-2
2-2-1. White Balance of color temperature “normal” ... 2-2
2-2-2. White Balance of color temperature “cool” ........ 2-3
2-2-3. White Balance of color temperature “warm” ..... 2-3
3. DIAGRAMS ............................................ 3-1
3-1. CIRCUIT BOARDS LOCATION ......................... 3-1
3-2. SCHEMATIC DIAGRAMS AND PRINTED
WIRING BOARDS .............................................. 3-1
(1) A Board ................................................................. 3-2
(2) B Board ................................................................. 3-7
(3) D2 Board ............................................................... 3-14
(4) G Board ................................................................. 3-15
(5) H1, H2 Boards ...................................................... 3-16
(6) H3, H4 Boards ...................................................... 3-17
(7) TU Board ............................................................... 3-18
(8) U1 Board ............................................................... 3-19
3-3. SEMICONDUCTORS ......................................... 3-20
4. EXPLODED VIEWS ............................... 4-1
4-1. CHASSIS ............................................................ 4-2
4-2. PACKING MATERIALS (Made in Spain) ........... 4-4
4-3. PACKING MATERIALS (Made in Japan) ........... 4-5
5. ELECTRICAL PARTS LIST ................... 5-1
Page of 74
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Here you can read online and download Sony KLV-21SR2 Service Manual in PDF. KLV-21SR2 service manual will guide through the process and help you recover, restore, fix, disassemble and repair Sony KLV-21SR2 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.