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Service Modes, Error Codes, and Fault Finding

EN 15

EM1.1A AA

The following tips are useful to isolate the problem area, after
overriding the +5V protection. Determine whether:
–

The MSP sound processor is loading the +5V; isolate 3650
and/or 4604 (see diagram B6).

–

The main Tuner is loading the +5V source; isolate coil
5901.

Error 5
‘HOP POR error’

When the POR bit is not communicated during startup, the
processor will generate 'HOP POR not successful.'

Error 6
‘General I

C error’

This will occur in the following cases:
–

SCL or SDA is shorted to ground.

–

SCL is shorted to SDA.

–

SDA or SCL connection at the microprocessor is open.

Error 7
‘Mains Dip error’

Hardware error; this error indicates

problems with the mains.

Error 9
‘TEDE9’

Tuner protection of the main tuner.

Error 10
‘NVM error’

Non Volatile Memory (EEPROM - pos. 7012) does not respond
to the microprocessor.

Error 11
‘NVM Identification error’

During the last startup, the NVM and the microprocessor did
not recognize each other (for example, one of them was
replaced, or the NVM memory has been changed/adapted or
lost), therefore the NVM was loaded with default values.

Error 12
‘Painter error’

Microprocessor (Painter - pos. 7001) internal RAM test failure.

Error 14
MSP error

Sound controller MSP34xx (pos. 7651) does not respond to the
microprocessor.

Error 22
Histogram IC error
Error 30
HIP I/O error

TDA 9321 HIP I/O video processing I

C communication failure.

Error 31
PICNIC error

SAA4978 PICNIC I

C communication failure.

Error 32
HOP error

TDA 9330 HOP video control/geometry I

C communication

failure (pos. 7301 on the SSB).

Error 35
I/O expander error

I/O expander IC M62320P I

C communication failure.

Note:

Error codes 1, 2, 4, and 7 are protection codes, and in

this case supplies of some circuits will be switched off. Also, in
protection, the LED will blink the number of times equivalent to
the most recent error code.

5.6

The 'Blinking LED' Procedure

Via this procedure, you can make the contents of the error
buffer visible via the front LED. This is especially useful for fault
finding when there is no picture.

When the SDM is entered, the LED will blink the contents of the
error buffer.
Error codes > 10 are shown as follows:
–

a long blink of 750ms (which is an indication of the decimal
digit),

–

a pause of 1.5s,

–

n short blinks (n = 1 - 9),

–

when all the error codes are displayed, the sequence
finishes with a blink of 3s,

–

the sequence starts again.

Example of error buffer:

12 9 6 0 0

After entering SDM:
–

1 long blink of 750ms followed by a pause of 1.5s,

–

2 short blinks followed by a pause of 3s,

–

9 short blinks followed by a pause of 3s,

–

6 short blinks followed by a pause of 3s,

–

1 long blink of 3s to finish the sequence,

–

the sequence starts again.

Note:

If errors 1, 2, 4 or 7 occur, the LED always gives the most

recent error, even if the set is NOT in service mode.

5.7

Protections

5.7.1

General

This chassis has only one microprocessor (Painter) which
remains active during Standby. This is because power for the
microprocessor and the memories comes from the 3V3 supply,
which is derived from the 5V Standby circuitry. Therefore, in
both Power On and Standby mode the microprocessor is
connected to this power supply.

If a fault situation is detected, an error code will be generated,
and if necessary, the set will be put in the protection mode. The
protection mode is indicated by blinking of the LED (at a
frequency of 3Hz). In some error cases, the microprocessor
does not put the set in the protection mode. The error codes of
the error buffer can be read via the service menu (SAM), the
blinking LED procedure, or via DST/ComPair.

To get a quick diagnosis, this chassis has 3 service modes
implemented:
•