Sony KD-28DX40U User manual

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SERVICE MANUAL FE-2 CHASSIS
MODEL COMMANDER DEST CHASSISNO.
KD-28DX40U RM-933 UK SCC-Q52K-A
MODEL COMMANDER DEST CHASSISNO.
KD-32DX40U RM-933 UK SCC-Q52L-A
KD-28/32DX40
RM-933

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TABLE OF CONTENTS
Section Title Page Section Title Page
Specifications .................... 3
Connectors .................... 4
Self Diagnostic Software .................... 5
1. GENERALAutomaticallyTuningtheTV .................... 6
Finding theVideo Channel .................... 6
SelectingDigital orAnalogue
Mode .................... 6
The Programme IndexTable .................... 6
The Channel Index Menu .................... 6
Viewing DigitalTeletext .................... 7
Teletext(Analogue) .................... 8
The Digital EPG Menu .................... 8
The Digital INFO Display .................... 9
The TV Menu System .................... 10
The Set Up Menu .................... 11
Remote Control of Equipment .................... 12
Troubleshooting .................... 12
2. DISASSEMBLY
2-1. Rear Cover Removal .................... 13
2-2. Side Control Module Removal .................... 13
2-3. Chassis Removal .................... 13
2-4. Service Position .................... 14
2-5. F6 and H8 Board Removal .................... 14
2-6. N Board Removal .................... 14
2-7. Picture Tube Removal .................... 15
BottomPlates .................... 16
3. SET-UP ADJUSTMENTS
3-1. BeamLanding .................... 17
3-2. Convergence .................... 18
3-3. FocusAdjustment .................... 20
3-4. Screen (G2), White Balance .................... 20
4. CIRCUIT ADJUSTMENTS
4-1. ElectricalAdjustments .................... 21
4-2. Test Mode 1 .................... 23
4-3. Test Mode 2 .................... 23
5. DIAGRAMS
5-1. Block Diagrams (1) .................... 24
Block Diagrams (2) .................... 25
Block Diagrams (3) .................... 26
5-2. Circuit Board Location .................... 27
5-3. Schematic Diagrams and
Printed Wiring Boards .................... 27
* A Board .................... 29
* C Board .................... 32
* VM Board .................... 33
* A1 Board .................... 34
* B Board .................... 36
* H2 Board .................... 36
* D3 Board .................... 37
* H8 Board .................... 37
* F3 Board .................... 37
* D2 Board .................... 37
* F6 Board .................... 37
5-4. Semiconductors .................... 38
5-5. IC Blocks .................... 40
6. EXPLODEDVIEWS
6-1. Chassis .................... 41
6-2. PictureTube .................... 42
7. ELECTRICAL PARTS LIST .................... 43
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.

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WARNING (UK Models only)
The flexible mains lead is supplied connected to a B.S. 1363 fused
plug having a fuse of 5 AMP rating. Should the fuse need to be
replaced, use a 5 AMP FUSE approved by ASTA to BS 1362, ie one
that carries the ASA
Tmark.
IF THE PLUG SUPPLIED WITH THIS APPLIANCE IS NOT SUIT-
ABLE FOR THE OUTLET SOCKETS IN YOUR HOME, IT SHOULD
BE CUT OFF AND AN APPROPRIATE PLUG FITTED. THE PLUG
SEVERED FROM THE MAINS LEAD MUST BE DESTROYED AS A
PLUG WITH BARED WIRES IS DANGEROUS IF ENGAGED IN A
LIVE SOCKET.
When an alternative type of plug is used, it should be fitted with a
5 AMP FUSE, otherwise the circuit should be protected by a 5 AMP
FUSE at the distribution board.
How to replace the fuse.
Open the fuse compartment with
a screwdriver blade and replace
the fuse.
FUSE
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21 pin connector
Connected Not Connected (open) * at 20Hz - 20kHz
Pin No 124 Signal Signal level
1Audio output B
(right) Standard level : 0.5V rms Output impedence : Less than 1kohm*
2Audio output B (right) Standard level : 0.5V rms Output impedence : More than 10kohm*
3Audio output A (left) Standard level : 0.5V rms Output impedence : Less than 1kohm*
4Ground (audio)
5Ground (blue)
6Audio input A
(left) Standard level : 0.5V rms Output impedence : More than 10kohm*
7Blue input 0.7 +/- 3dB, 75 ohms positive
8Function select
(AV control)
High state (9.5-12V) : Part mode
Low state (0-2V) : TV mode
Input impedence : More than 10K ohms
Input capacitance : Less than 2nF
9Ground (green)
10 Open
11 Green Green signal : 0.7 +/- 3dB, 75 ohms,
positive
12 Open
13 Ground (red)
14 Ground (blanking)
15
_ _ Red input 0.7 +/- 3dB, 75 ohms, positive
_ (S signal Chroma
input) 0.3 +/- 3dB, 75 ohms, positive
16 Blanking input
(Ys signal) High state (1-3V) Low state (0-0.4V) Input impedence : 75 ohms
17 Ground (video
output)
18 Ground (video
input)
19 Video output 1V +/- 3dB, 75ohms, positive sync 0.3V
(-3+10dB)
20
_ _ Video input 1V +/- 3dB, 75ohms, positive sync 0.3V
(-3+10dB)
_ Video input
Y (S signal) 1V +/- 3dB, 75ohms, positive sync 0.3V (-3+10dB)
21 Common ground
(plug, shield)
19
17
15
13
11
9
7
5
3
1
20
18
16
14
12
10
8
6
4
2
21
Rear Connection Panel Front Connection Panel
p- +
4
MONO
4
L/G/S/I
R/D/D/D
s
4
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S-Video
socket

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FE-2 SELF DIAGNOSTIC SOFTWARE
The identification of errors within the FE-2 chassis is triggered in one of two ways :- 1: Busy or 2: Device failure to respond to IIC. In the event
of one of these situations arising the software will first try to release the bus if busy (Failure to do so will report with a continuous flashing
LED) and then communicate with each device in turn to establish if a device is faulty. If a device is found to be faulty the relevant device number
will be displayed through the LED (Series of flashes which must be counted) See table 1., non fatal errors are reported using this method.
Each time the software detects an error it is stored within the NVM. See Table 2.
FlashTiming Example : e.g. error number 3
StByLED
ON ON ON
OFF OFF
Table 1 How to enter intoTable 2
1. Turn on the main power switch of theTV set and enter into
the ‘Stanby Mode’.
2. Press the following sequence of buttons on the Remote
Commander.
i+
5-
(ON SCREEN (DIGIT 5) (VOLUME -) (TV)
DISPLAY)
3. The following table will be displayed indicating the error
count.
Table 2
Note:To clear the error count data press ‘80’on the Remote
commander.
UNEMRORRE
20E 30E 40E 50E 60E 70E 80E 90E 01E 11E
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0
0
0
0
0
0
0
0
2
11
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