Sony KV-28DS65U Service Manual ▷ View online
5
21 pin connector
Connected Not Connected (open) * at 20Hz - 20kHz
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)
R/D/D/D
L/G/S/I
2
S
2
1
4
S
4
1/
R/D/
D/D
D/D
L/G/
S/I
S/I
C
S
S
MODEM
....
L/G/S/I
R/D/D/D
S
3
3
3
19
17
15
13
11
9
7
5
3
1
20
18
16
14
12
10
8
6
4
2
21
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.
6
GE-1A SELF DIAGNOSTIC SOFTWARE
The identification of errors within the GE-1A 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 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.
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 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.
ERROR
LED
ERROR
COUNT
COUNT
No error
00
Not allowed (may be confused with Sircs response
flash!)
flash!)
01
Over Current Protection
02
Over Voltage Protection
03
Vertical Protection
04
No function
05
H - Protection
06
Speaker Protection
07
MEGATEXT
08
NVM
09
Main colour decoder
10
Feature Box 1
11
D/A converter
12
Multi Component processor
13
Multi sound processor
14
DMUX
15
Feature Box 2
16
StBy LED
ON
ON
ON
OFF
OFF
Flash Timing Example : e.g. error number 3
Diagnostic Item
Description
No of times Standby
LED Flashes
Probable cause
Location
Detected Symptoms
Power does not turn on
Does not light
Power cord is not plugged in
Fuse is burned out
Fuse is burned out
Power does not come on
No power is supplied to the TV
AC power supply is faulty
No power is supplied to the TV
AC power supply is faulty
+B Overvoltage(OVP)
2 times
H.OUT (Q502) is shorted. (D Board)
IC603 Power IC is shorted. (D Board)
IC603 Power IC is shorted. (D Board)
Power does not come on
Load on power line has shorted
Load on power line has shorted
Vertical Deflection stopped
4 times
+15V is not supplied R519 open (D Board)
-15V is not supplied R518 open (D Board)
IC502 is shorted (D Board)
-15V is not supplied R518 open (D Board)
IC502 is shorted (D Board)
Vertical deflection pulse has stopped
Power line has shorted
Power line has shorted
7
ERROR DETECTION MONITOR
Device acknowledge is used to check IIC errors. Device acknowledge is checked by sending an IIC start sequence during CRT power on. Each
device is checked three times, if there is no acknowledge after every attempt, it will be regarded as an error.
There are three steps to check errors
device is checked three times, if there is no acknowledge after every attempt, it will be regarded as an error.
There are three steps to check errors
1. IIC line 0
If all devices except the NVM are errors, IIC line 0 error is displayed
2. Board check
If all devices mounted on one board have errors, board error is displayed
3. Each device check
If IIC line error and board error are not detected then the device with an error is displayed
The detected errors can be displayed as follows:
1. Error Monitor Menu
2. Error Reader
2. Error Reader
1. ERROR MONITOR MENU
The error monitor menu is displayed by selecting TT22. The following menu will be displayed:
ERROR MONITOR
Operating Time :
930360h 15h
Saved Errors :
1. 000h = B-Board
2. 000h = P87C654-Feature Box *B
3. 000h = no error occured
4. 000h = no error occured
5. 000h = no error occured
2. 000h = P87C654-Feature Box *B
3. 000h = no error occured
4. 000h = no error occured
5. 000h = no error occured
Actual Error :
New error code sequence is starting
Ignore Errors : [off]
To reset NVM press TT65
8
2. ERROR READER DISPLAY
The error reader display is connected to the service connector to read actual error codes. The part number for the error reader display is
S-188-900-10. Once an error has been detected it will then be displayed on the two digit error reader. The errors displayed refer to the
following table :
S-188-900-10. Once an error has been detected it will then be displayed on the two digit error reader. The errors displayed refer to the
following table :
Send Data to Error Reader
Error Code
Data high
Data Low
Error type
Function
00 00h
-
f0h
no device
Gen.IIC Error
00 01h
f0h
01h
IIC 0 line
00 02h
f0h
02h
IIC 1 line
Board Error
01 00h
f1h
00h
A Board
02 00h
f2h
00h
No function
03 00h
f3h
00h
B Board
04 00h
f4h
00h
No function
05 00h
f5h
00h
D1 Board
06 00h
f6h
00h
J Board
07 00h
f7h
00h
Q Board
Device Error
A Board
01 01h
f1h
01h
ST24C64
NVM doesn’t respond
01 02h
f1h
02h
SDA5273/75
Megatext doesn’t respond
01 03h
f1h
03h
CXA2101
MCP
01 04h
f1h
04h
SDA9361
Deflection doesn’t respond
01 05h
f1h
05h
TVF-01-XXX
Tuner doesn’t respond
01 06h
f1h
06h
No function
01 07h
f1h
07h
MSP3410D
Audio processor
01 08h
f1h
08h
CXA1875
Port Expander for SCART doesn’t respond
01 09h
f1h
09h
CXA1315
Port Expander for UYV doesn’t respond
01 10h
f1h
10h
PCF8574
General Port Expander 1 doesn’t respond
01 11h
f1h
11h
No function
01 12h
f1h
12h
PCF8574
Interrupt Port Expander doesn’t respond
01 13h
f1h
13h
PCF8593
Real Time Clock doesn’t respond
01 14h
f1h
14h
No function
02 01h
f2h
01h
TC9337
Audio Effect Processor (DSP) doesn’t respond
B Board
03 01h
f3h
01h
TDA9144
Colour Decoder doesn’t respond
03 02h
f3h
02h
No function
03 03h
f3h
03h
No function
03 04h
f3h
04h
P87C654
Feature box1 doesn’t respond
03 05h
f3h
05h
SDA9280
D/A Converter doesn’t respond
03 06h
f3h
06h
P87C654
Feature box doesn’t respond
D1 Board
05 01h
f5h
01h
CXA1875
Port expander for MP, S-Cont doesn’t respond
J Board
06 01h
f6h
01h
CXA1855
AV-Switch Doesn’t respond
06 02h
f6h
02h
TDA7309
Headphone processor doesn’t respond
Click on the first or last page to see other KV-28DS65U service manuals if exist.