Sony KP-48PS2 / KP-61PS2 Service Manual ▷ View online
– 5 –
KP-48PS2/61PS2
K
RM-903
SECTION 1
SELF DIAGNOSIS FUNCTION
1-1. RE-3 SELF DIAGNOSTIC SOFTWARE
The identification of errors within the RE-3 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.
Power cord is not plugged in
Power does not come on
Power does not turn on
Does not light
Fuse is Burned out
No power is supplied to the TV
AC power supply is faulty
H. OUT (Q5104) is shorted (D Board)
Power does not come on
+B Over current (OCP)
2 times
Linearity FET (Q5105) is shorted (D Board)
IC6004 Power IC is shorted (G Board)
Load on power line has shorted
+15 V is not supplied R5340 open (D Board)
Vertical deflection pulse has stopped
Vertical Deflection stopped
4 times
–15 V is not supplied R5341 open (D Board)
Power line has shorted
IC5302 is shorted (D Board)
No. of times Standby
LED Flashes
Detected Symptoms
LED
ERROR
ERROR
COUNT
COUNT
No error
00
Not allowed (may be confused with Sircs response flash)
01
Over Current Protection
02
Over Voltage Protection
03
Vertical Protection
04
Not used
05
H-Protection
06
Speaker Protection
07
General IIC Line 0 error
08
MEGATEXT (IC9502)
09
NVM (IC9108)
10
Main colour decoder (IC8301)
11
Backend (IC4301)
14
Multi sound processor (IC4702)
15
External RAM (IC9107)
17
Diagnostic Item
Description
Probable cause Location
Flash Timing Example : e.g. error number 3
ON
OFF
OFF
ON
ON
Standby LED
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KP-48PS2/61PS2
K
RM-903
1-2. 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 step to check errors.
1. IIC line 0
If all devices except the NVM have 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
1-2-1. Error Monitor Menu
The error monitor menu is displayed by selecting TT33. The following menu will be displayed:
Error Monitor
1
Operating Time :
Stored Errors :
1. A-Board
Current Error :
Start Error Sequence
2. B3-B CXA2100 MID
3. J-B CXA2123 Main Col Dec
4. Error Code Not Valid
5. Error Code Not Valid
3. J-B CXA2123 Main Col Dec
4. Error Code Not Valid
5. Error Code Not Valid
Ignore Errors
OFF
000021 h 40 min
ON
ON
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KP-48PS2/61PS2
K
RM-903
1-2-2. 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:
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
not used
Board Error
01 00h
f1h
00h
A Board
04 00h
f4h
00h
B3 Board
06 00h
f6h
00h
E Board
07 00h
f7h
00h
J/S Board
08 00h
f8h
00h
M Board
Device Error
A Board
01 01h
f1h
01h
CXA1875
Port Expander
01 02h
f1h
02h
TU1301
Main Tuner
01 03h
f1h
03h
TU1302
Sub Tuner
B3 Board
04 01h
f4h
01h
CXD9509
MID
E Board
06 01h
f6h
01h
CXA2100
Backend
J Board
04 04h
f4h
04h
TDA9178
Picture Booster
07 03h
f7h
03h
CXA2123
Sub Colour
07 04h
f7h
04h
CXA2123
Main Colour
07 0Ah
f7h
0Ah
CXA2149
AV SW
S Board
07 05h
f7h
05h
CXA1875
Sub Sound
07 08h
f7h
08h
MSP3410D
Sound Proc
M Board
08 01h
f8h
01h
ST24C32
NVM
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KP-48PS2/61PS2
K
RM-903
SECTION 2
DISASSEMBLY
2-1. REAR BOARD REMOVAL
• KP-48
• KP-61
1
Twelve screws
(Hexagon head)
(Hexagon head)
2
Rear board
1
Thirteen screws
(Hexagon head)
(Hexagon head)
2
Rear board
2-2. MAIN BRACKET BLOCK
REMOVAL
1
Light shield
board
board
2
Two screws
(Hexagon Head)
(Hexagon Head)
3
Main bracket block
2-3. SERVICE POSITION
Main bracket block
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