KV-28FQ70B — Sony TV Service Manual (repair manual)

Model
KV-28FQ70B
Pages
78
Size
36.2 MB
Type
PDF
Document
Service Manual
Brand
Device
TV
File
kv-28fq70b.pdf
Date

View Sony KV-28FQ70B Service Manual online

- 1 -
SERVICE MANUAL
AE-6B
  
CHASSIS
MODEL
COMMANDER
DEST
CHASSIS NO.
KV-28FQ70B
RM-938
FR
SCC-Q83P-A
KV-28FQ70E
RM-938
ESP
SCC-Q81R-A
MODEL
COMMANDER
DEST
CHASSIS NO.
KV-28FQ70
RM-938
KV-28FQ70U 
RM-938
UK
SCC-Q84Q-A
- 2 -
TABLE OF CONTENTS
Section
Title
Page
Section
Title
Page
Caution
....................
3
Specifications
....................
4
Connectors
....................
6
Self Diagnostic Software
....................
7
1.  GENERAL
Switching On the TV and
Automatically Tuning
....................
8
Introducing and Using the Menu
System
....................
9
Menu Guide
....................
9
Teletext
....................
10
Fastext
....................
10
Remote Control Configuration
for VCR/DVD
....................
11
Specifications
....................
11
Troubleshooting
....................
12
2.  DISASSEMBLY
2-1.
Rear Cover Removal
....................
13
2-2.
Speaker Connector Disconnection ................
13
2-3.
Chassis Removal and Refitting ....................
13
2-4.
Service Position
....................
14
2-5.
G Board Removal
....................
14
2-6.
D2 Board Removal
....................
14
2-7.
D Board Removal
....................
14
2-8.
M2 Board Removal
....................
15
2-9.
Service Connector for M2 Board..................
15
2-10.
Wire Dressing
....................
15
2-11.
Picture Tube Removal
....................
16
Bottom Plates
....................
17
3.  SET-UP ADJUSTMENTS
3-1.
Beam Landing
....................
18
3-2.
Convergence
....................
19
3-3.
Focus Adjustment
....................
21
3-4.
Screen (G2), White Balance
....................
21
  4.  CIRCUIT ADJUSTMENTS
4-1.
Electrical Adjustments
....................
22
4-2.
Test Mode 2
....................
24
5.  DIAGRAMS
5-1.
Block Diagrams (1)
....................
25
Block Diagrams (2)
....................
26
Block Diagrams (3)
....................
27
Block Diagrams (4)
....................
28
5-2.
Circuit Board Location
....................
28
5-3.
Schematic Diagrams and
Printed Wiring Boards
....................
28
* A Board Schematic
....................
29
* A Board PWB
....................
35
* F1 Board Schematic
....................
39
* F1 Board PWB
....................
40
* H1 Board Schematic
....................
39
* H1 Board PWB
....................
40
* VM Board Schematic
....................
39
* VM Board PWB
....................
40
* G Board Schematic
....................
41
* G Board PWB
....................
40
* C Board Schematic
....................
42
* C Board PWB
....................
43
* M2 Board Schematic
....................
44
* M2 Board PWB
....................
43
* D2 Board Schematic
....................
45
* D2 Board PWB
....................
43
* D Board Schematic
....................
47
* D Board PWB
....................
46
5-4.
Semiconductors
....................
48
5-5.
IC Blocks
....................
51
6.  EXPLODED VIEWS
6-1.
Chassis
....................
53
6-2.
Picture Tube
....................
54
7.  ELECTRICAL PARTS LIST
....................
55
CAUTION
SHORT  CIRCUIT THE  ANODE  OF THE  PICTURE TUBE  AND THE
ANODE CAP TO THE METAL CHASSIS, CRT SHIELD, OR THE
CARBON PAINTED ON THE CRT, AFTER REMOVAL OF THE
ANODE CAP.
WARNING !!
AN ISOLATION TRANSFORMER SHOULD BE USED DURING
ANY SERVICE WORK TO AVOID POSSIBLE SHOCK HAZARD
DUE TO LIVE CHASSIS, THE CHASSIS OF THIS RECEIVER IS
DIRECTLY CONNECTED TO THE POWER LINE.
SAFETY-RELATED COMPONENT WARNING !!
COMPONENTS IDENTIFIED BY SHADING AND MARKED
  
 
 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.
ATTENTION
APRES AVOIR DECONNECTE LE CAP DE’LANODE,
COURT-CIRCUITER L’ANODE DU TUBE CATHODIQUE ET
CELUI DE L’ANODE DU CAP AU CHASSIS METALLIQUE DE
L’APPAREIL, OU AU COUCHE DE CARBONE PEINTE SUR LE
TUBE CATHODIQUE OU AU BLINDAGE DU TUBE
CATHODIQUE.
ATTENTION !!
AFIN D’EVITER TOUT RISQUE D’ELECTROCUTION
PROVENANT D’UN CHÁSSIS SOUS TENTION, UN
TRANSFORMATEUR D’ISOLEMENT DOIT ETRE UTILISÈ LORS
DE TOUT DÈPANNAGE LE CHÁSSIS DE CE RÈCEPTEUR EST
DIRECTMENT RACCORDÈ Á L’ALIMENTATION SECTEUR.
ATTENTION AUX COMPOSANTS RELATIFS Á
LA SECURITÈ!!
LES COMPOSANTS IDENTIFIÈS PAR UNE TRAME ET PAR UNE
MARQUE  
  
SUR LES SCHÈMAS DE PRINCIPE, LES VUES
EXPLOSÈES ET LES LISTES DE PIECES SONT D’UNE IMPOR-
TANCE CRITIQUE POUR LA SÈCURITÈ DU FONCTIONNEMENT,
NE LES REMPLACER QUE PAR DES COMPSANTS SONY DONT
LE NUMÈRO DE PIÈCE EST INDIQUÈ DANS LE PRÈSENT
MANUEL OU DANS DES SUPPLÈMENTS PUBLIÈS PAR SONY.
- 3 -
CAUTION
Lead Free Soldered Boards
The circuit boards listed below [Table 1] used in these models
may have been processed using Lead Free Solder. The boards are
identified by the LF logo located close to the board designation
e.g. F1, H1 etc [ see examples ]. The servicing of these boards
requires special precautions to be taken as outlined below.
Table 1
example 1
example 2
It is strongly recommended to use Lead Free Solder material in order to guarantee optimal quality of new solder joints. Lead Free Solder is
available under the following part numbers :
Due to the higher melting point of Lead Free Solder the soldering iron tip temperature needs to be set to 370 degrees centigrade. This
requires soldering equipment capable of accurate temperature control coupled with a good heat recovery characteristics.
For more information on the use of Lead Free Solder, please refer to  http://www.sony-training.com
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Download Sony KV-28FQ70B Service Manual (Repair Manual)

Here you can view online or download Sony KV-28FQ70B Service Manual in pdf. This Service Manual can help you recover, restore, fix, disassemble and repair Sony KV-28FQ70B TV. Information contained in Sony KV-28FQ70B 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).