Sony KV-32FX20A Service Manual ▷ View online
4
21 pin connector ( 1, 2/ 2)
Connected
Not Connected (open) * at 20Hz - 20kHz
19
17
15
13
11
9
7
5
3
1
20
18
16
14
12
10
8
6
4
2
21
Pin No
1
2
4
Signal
Signal level
1
Audio output B
(right)
(right)
Standard level : 0.5V rms
Output impedence : Less than 1kohm*
Output impedence : Less than 1kohm*
2
Audio output B
(right)
(right)
Standard level : 0.5V rms
Output impedence : More than 10kohm*
Output impedence : More than 10kohm*
3
Audio output A
(left)
(left)
Standard level : 0.5V rms
Output impedence : Less than 1kohm*
Output impedence : Less than 1kohm*
4
Ground (audio)
5
Ground (blue)
6
Audio input A
(left)
(left)
Standard level : 0.5V rms
Output impedence : More than 10kohm*
Output impedence : More than 10kohm*
7
Blue input
0.7 +/- 3dB, 75 ohms positive
8
Function select
(AV control)
(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
Low state (0-2V) : TV mode
Input impedence : More than 10K ohms
Input capacitance : Less than 2nF
9
Ground (green)
10
Open
11
Green
Green signal : 0.7 +/- 3dB, 75 ohms,
positive
positive
12
Open
13
Ground (red)
14
Ground (blanking)
15
_
_
Red input
0.7 +/- 3dB, 75 ohms, positive
_
(S signal Chroma
input)
input)
0.3 +/- 3dB, 75 ohms, positive
16
Blanking input
(Ys signal)
(Ys signal)
High state (1-3V) Low state (0-0.4V)
Input impedence : 75 ohms
Input impedence : 75 ohms
17
Ground (video
output)
output)
18
Ground (video
input)
input)
19
Video output
1V +/- 3dB, 75ohms, positive sync 0.3V
(-3+10dB)
(-3+10dB)
20
_
_
Video input
1V +/- 3dB, 75ohms, positive sync 0.3V
(-3+10dB)
(-3+10dB)
_
Video input
Y (S signal)
Y (S signal)
1V +/- 3dB, 75ohms, positive sync 0.3V
(-3+10dB)
(-3+10dB)
21
Common ground
(plug, shield)
(plug, shield)
Signal
Ground
Ground
Y (S signal) input
C (S signal) input
Pin No.
1
2
3
4
Signal Level
1V 3dB 75 ohm, positive Sync. 0.3V -3 + 10dB
0.3V 3dB 75 ohm, positive Sync.
L/G/S/I R/D/D/D
MONO
+
+
P
_
_
s
3
3
R/D/D/D
L/G/S/I
1
S 2
2
5
TABLE OF CONTENTS
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
ANODE CAP TO THE METAL CHASSIS, CRT SHIELD, OR THE
CARBON PAINTED ON THE CRT, AFTER REMOVAL OF THE
ANODE CAP
WARNING !!
AN ISOLATING 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.
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.
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.
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.
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
SÈCURITÈ !!
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 IMPORTANCE
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.
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.
Section
Title
Page
Section
Title
Page
Warning and Caution
.....................3
Self-Diagnostic Function
.....................6
1. GENERAL
Overview of the Remote
.....................10
Control Buttons
Adjusting the Picture
Adjusting the Picture
.....................12
Adjusting the Sound
.....................12
Teletext
.....................13
Troubleshooting
.....................14
2. DISASSEMBLY
2-1.
Rear Cover Removal
.....................15
2-2.
Chassis Assy Removal
.....................15
2-3-1. Service Position (1)
.....................15
2-3-2. Service Position (2)
.....................15
2-4.
Wire Dressing
.....................16
2-5.
A Board Removal
.....................16
2-6.
A Extension Board
.....................16
2-7.
Picture Tube Removal
.....................17
Removal and Replacement of the .....................18
Main - Bracket Bottom Plates
Main - Bracket Bottom Plates
3. SET-UP ADJUSTMENTS
3-1.
Beam Landing
.....................19
3-2.
Convergence
..................... 20
3-3.
Screen G2
.....................22
3-4.
Focus
.....................22
3-5.
White Balance
.....................23
4. CIRCUIT ADJUSTMENTS
4-1.
Electrical Adjustments
.....................24
4-2.
‘TT’ Test Mode
.....................27
4-3.
‘T’ Test Mode
.....................28
5. DIAGRAMS
5-1.
Block Diagrams (1)
.....................29
Block Diagrams (2)
.....................33
5-2.
Circuit Board Location
.....................36
5-3.
Schematic Diagrams and
Printed Wiring Boards
Printed Wiring Boards
.....................36
*
C Board
.....................37
*
D Board
.....................43
*
D2 Board
.....................46
*
VM Board
.....................47
*
H Board
.....................51
*
A Board
.....................59
*
D1 Board
.....................64
5-4.
Semiconductors
.....................69
5-5.
IC Blocks
.....................71
6. EXPLODED VIEWS
6-1.
Chassis
.....................73
6-2.
Picture Tube
.....................74
7. ELECTRICAL PARTS LIST
.....................75
6
BE-3E SELF DIAGNOSTIC SOFTWARE
The errors indicated below can be read using an Error Reader Display (Part Number S-188-900-10) connected to the service connector. Once an
error has been detected it will then be displayed on the two digit error reader. During the power up procedure and during normal run time, the
micro’s self diagnostic procedures monitor for various errors. Errors displayed refer to the table indicated below.
error has been detected it will then be displayed on the two digit error reader. During the power up procedure and during normal run time, the
micro’s self diagnostic procedures monitor for various errors. Errors displayed refer to the table indicated below.
Error Number
Error Description
00
No error (TV Error Reader shows 00 in normal condition)
01
Not allowed (may be confused with Sircs response flash on LED)
02
Protection circuit trip (OCP, OVP & No V-Sync)
03
Reserved for OVP (Included in error 2 for BE-3E)
04
Reserved for No V-Sync (Included in error 2 for BE-3E)
05
AKB
06
IIC Scl Low <Power Up only>
07
IIC Sda Low <Power Up only>
08
IIC Sda & Scl Low <Power Up only>
09
Jungle controller no acknowledge <Power Up only>
10
Video Switch (CXA2040) no acknowledge <Power Up only>
11
Tuner no acknowledge
12
MSP no acknowledge
13
NVM no acknowledge
14
AV switch (CXA2089) no acknowledge (DS20 & DX20)
15
Not used
16
Port Expander (CXA1875) no acknowledge (DS20 & DX20)
17
Not used
18
Dynamic Convergence (CXA8070) no acknowledge
19
Cannot Initialise jungle (after initial power on check OK) - <Chassis Initialisation>
20
Jungle controller response failure after power up check (+9V test)
21
Video Switch (CXA2040) cannot power on reset - <Chassis Initialisation>
22
Video Switch (CXA2040) response failiure after power up check (+9V test)
23
NVM acknowledge fail after initialisation (STBY +5V - same as micro!)
24
MSP run-time failure <May Not Be Fatal - Display On Error Reader>
25
DSP run-time failure <May Not Be Fatal - Display On Error Reader>
26
M3L bus Clock low time out after data send <Run-Time Failure>
27
M3L bus Clock low time out after data send <At Power Up Check>
28
M3L bus Clock low time out after data send <At Initialisation>
29
M3L Txd Low <Power Up Only>
30
M3L Rxd Low <Power Up Only>
31
M3L Enable Low <Power Up Only>
32
Compact Text test fail <Power Up Only>
33
Compact Text does not respond (+5V test)
34
Compact text run-time failure <May Not Be Fatal - Display On Error Reader>
7
Protection Error (Error 2):
AKB Error (Error 5):
Startup Diagnostic Errors (Errors 6-18, 27, 29-32):
100
90
80
70
50
60
40
30
20
10
0
Time / seconds
IKR
Return
Return
A
B
C
D
E
F
A.
IKR Return first goes high after 12 seconds.
B.
Micro begins checking IKR Return status 20 seconds after power on.
C.
Micro detects IKR return = 0.
D.
Micro detects that IKR has been 0 for 10 seconds; NVM counter is incremented and the LED
starts flashing (flashes 5 times, off for 2 seconds, flashes 5 times, etc.
starts flashing (flashes 5 times, off for 2 seconds, flashes 5 times, etc.
E.
Micro detects that IKR=1; LED continues to flash.
F.
Micro detects that IKR has been high for 10 seconds; LED stops flashing.
NVM
Error Description
6
SCL pin low
7
SDA pin low
8
Both SCL and the SDA pins are low
9
No acknowledge from the jungle (CXA2076)
10
No acknowledge from the video switch (CXA2040)
11
No acknowledge from the tuner
12
No acknowledge from the MSP
13
No acknowledge from the NVM
14
No acknowledge from the CXA2089 video switch (DS20 & DX20)
16
No acknowledge from the CXA1875 video Port Expander (DS20 & DX20)
18
No acknowledge from the Dynamic Convergence (CXA8070)
27
M3L_TXD pin low after Compact Text RAM test.
29
M3L_TXD pin low
30
M3L_RXD pin low
31
M3LEN pin low
32
Compact Text RAM test fail
Once every main loop (approximately 200ms OSD mode, 50ms text or menu mode), the micro checks the protection pin (pin 66). If the protection
pin is high 6 successive times, a protection error is diagnosed. The protection pin is not checked during the first 3 - 4 seconds after AC on.
If this error is diagnosed, the respective NVM register will be updated and the set goes straight into diagnostic standby with 2 flashes - no reset is
attempted.
pin is high 6 successive times, a protection error is diagnosed. The protection pin is not checked during the first 3 - 4 seconds after AC on.
If this error is diagnosed, the respective NVM register will be updated and the set goes straight into diagnostic standby with 2 flashes - no reset is
attempted.
Once every main loop the micro checks the AKB stability by reading the IKR return from the Jungle IC. IKR=1 means that the AKB is stable,
IKR=0 means that the AKB is unstable. If the AKB status is unstable for 10 seconds, an AKB error is diagnosed. AKB stability is not checked
during the first 20 seconds after AC switch on.
If this error is diagnosed, the respective NVM register will be updated and the response LED will flash 5 times continually, but the set will not go
into standby mode. If the AKB status becomes stable, and remains stable for 10 seconds, the LED will stop flashing.
IKR=0 means that the AKB is unstable. If the AKB status is unstable for 10 seconds, an AKB error is diagnosed. AKB stability is not checked
during the first 20 seconds after AC switch on.
If this error is diagnosed, the respective NVM register will be updated and the response LED will flash 5 times continually, but the set will not go
into standby mode. If the AKB status becomes stable, and remains stable for 10 seconds, the LED will stop flashing.
If any of these errors are detected, the respective NVM register will be incremented. The software will then carry on with the power up sequence.