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Month of Issue:  

July 2001

        

Classification: 

Yellow

Page 5 of 10

Revision  4

White – Carry out as required

Yellow – Carry out as required and whenever the unit comes in for service

 Red – Carry out on all units

A service tool has been introduced to assist in reprogramming the NVM.  This tool will
enable the engineer to reprogram the NVM, even if the set does not turn on (provided
that there is a 5V supply to the microprocessor, NVM and OTP).

Typical fault symptoms if the NVM is damaged include problems with the picture,
teletext or sound.

To reprogram the NVM, proceed as follows:

1.  Replace IC1002 (OTP) with the service jig.
2.  Turn on the television.  Note that the set will appear to be dead with both LED's

illuminated.

3.  Wait until the blanking process is complete.  During the blanking process, the

NICAM will flash ten times, stop, then flash ten times again.  This process will
continue indefinitely.  The NVM will be blanked when the LED stops flashing for the
first time (this may take up to 50 seconds after turning the set on).

4.  Switch off the set at the mains.
5.  Refit the original OTP.  It is important to ensure that the OTP contains the latest

version of software for the combination of model, CRT and Megatext IC (see
technical bulletin CTV2001 05 04).

6.  Switch on, the set will appear to be dead with both LED on for about the first 30 to

60 seconds while the NVM is being programmed.  If the set is turned off during this
period, it will be necessary to repeat this procedure from step 1.  Once the NVM
programming is complete the set will start up automatically.

7.  Adjust the tuning, grey scale, AGC, AFT and picture geometry a necessary.

Service Jig

FW-SERV-JIG01

AZ

Month of Issue:  

July 2001

        

Classification: 

Yellow

Page 6 of 10

Revision  4

White – Carry out as required

Yellow – Carry out as required and whenever the unit comes in for service

 Red – Carry out on all units

SYMPTOM In some instances, when a RGB signal is applied to the EURO-SCART socket, the

brightness varies with picture content.

Incorrect black level clamping.

Adjust NVM data on page 0D, position 0C from 73 to 57.

SYMPTOM Set fails to start, green LED stays on permanently.  Only one burst of activity on the

NVM I

2

C bus.

Serial data problem.

Remove the NVM (IC1003) and turn the set on.

If the LED gives two flashes, this means that there is no NVM data and that the
processor and OTP are working correctly.  This probably means that the NVM is
faulty.

IC1003

IC, NVM

RH-IX1603BMZZ

AV

SYMPTOM Low contrast, but when the test mode is entered, it returns to normal.

NVM corrupted.

Adjust G2 as described on Technical Bulletin CTV2000 01 04.

NB. If the fault does not clear, replace the NVM.

IC1003

NVM

RH-IX1603BMZZ

AV

Month of Issue:  

July 2001

        

Classification: 

Yellow

Page 7 of 10

Revision  4

White – Carry out as required

Yellow – Carry out as required and whenever the unit comes in for service

 Red – Carry out on all units

SYMPTOM After changing the NVM (or possibly due to data corruption), the half page text

appears in the wrong part of the screen - too far left or right.

Corruption of NVM memory.

Enter the service mode and change the following NVM position to the value shown.

Page:

00

Position:

68

Value:

36

Note: To enter the service mode, take the following steps.

1.  Turn the set on and ensure that a picture is being displayed.
2.  Turn the set off using the mains switch.
3.  Press the volume down and channel up buttons on the front of the set.
4.  Keeping the buttons pressed, turn the set on using the mains switch.
5.  Release the buttons when the service mode is displayed.

Use the channel buttons to move between functions, the volume buttons to change
values and the standby button to store.

Month of Issue:  

July 2001

        

Classification: 

Yellow

Page 8 of 10

Revision  4

White – Carry out as required

Yellow – Carry out as required and whenever the unit comes in for service

 Red – Carry out on all units

SYMPTOM NVM corruption.

Arcing can occur on the CRT base panel (PWB-B) caused by CRT discharges.

Add capacitors C1826 and C1827 as shown in the picture below.

Models produced after the following serial numbers already have the capacitors fitted:

66FW53H

726200

66FW54H

714595

76FW53H

713664

76FW54H

714633

C1826

Ceramic capacitor 4.7nf 10% 500V

VCKYPA2HB472K

AB

C1827

Ceramic capacitor 10nf  20% 250V

RC-KZ0029CEZZ

AC