Philips EM3E, Service Manual, Page: 28 / 120

Service Modes, Error Codes and Fault Finding GB 28 EM3E 5.
Stepwise shut down explanation
In the stepwise shutdown mode, state 2 is skipped (it is not
possible to de-initialise ICs).
Figure 5-7
Note: When the set is in stepwise mode and, due to
stepping-up, a protection is activated, the set will really go
into protection (blinking red LED). The set will not leave the
stepwise-mode however. By stepping up, the set can be
activated again, until state X where the protection was
activated. At state (X-1) diagnostic measurements can be
performed.
5.4.4 How To Connect
1. First install the ComPair Browser software (see the Quick
Reference Card for installation instructions).
2. Connect the RS232 interface cable between a free serial
(COM) port of your PC and the PC connector (marked
with ‘PC’) of the ComPair interface.
3. Connect the mains adapter to the supply connector
(marked with ‘POWER 9V DC’) of the ComPair interface.
4. Switch the ComPair interface ’OFF’.
5. Switch the television set ‘OFF’ with the mains switch.
6. Connect the ComPair interface cable between the
connector on the rear side of the ComPair interface
(marked with ‘I
2
C’) and the ComPair connector at the
rear side of the TV (situated just below the tuner input,
see also chapter 4).
7. Plug the mains adapter in a mains outlet, and switch the
interface ‘ON’. The green and red LEDs light up together.
The red LED extinguishes after approx. 1 second while
the green LED remains lit.
8. Start the ComPair program and read the ‘Introduction’
chapter.
Figure 5-8
5.4.5 How To Order
ComPair order codes:
•
Starter kit C SearchMan so ComPair
interface (excluding transformer): 4822 727 21629
• ComPair interface (excluding transformer): 4822 727
21631
• Starter kit ComPair software (registration version): 4822
727 21634
• Starter kit SearchMan software: 4822 727 21635
• ComPair CD (update): 4822 727 21637
• SearchMan CD (update): 4822 727 21638
• ComPair interface cable: 3122 785 90004
5.5 Error Buffer
5.5.1 Introduction
The error code buffer contains all detected errors since the
last time the buffer was erased. The buffer is written from left
to right. When an error occurs that is not yet in the error code
buffer, it is written at the left side and all other errors shift one
position to the right.
5.5.2 How to Read the Error Buffer
Use one of the following methods:
•
On screen via the SAM (only if you have a picture).
Examples:
–
ERROR: 0 0 0 0 0 : No errors detected
– ERROR: 6 0 0 0 0 : Error code 6 is the last and only
detected error
– ERROR: 9 6 0 0 0 : Error code 6 was first detected
and error code 9 is the last detected (newest) error
• Via the blinking LED procedure (when you have no
picture). See next paragraph.
• Via ComPair.
5.5.3 How to Clear the Error Buffer
Use one of the following methods:
•
By activation of the ‘RESET ERROR BUFFER’
command in the SAM menu:
• When you transmit the commands ‘DIAGNOSE’ - ‘99’ -
‘OK’ with ComPair (or with a DST).
• If the content of the error buffer has not changed for 50
hours, it resets automatically.
5.5.4 Error Codes
In case of non-intermittent faults, clear the error buffer before
you begin the repair. These to ensure that old error codes are
no longer present.
If possible, check the entire contents of the error buffer. In
some situations an error code is only the result of another
error code and not the actual cause (e.g., a fault in the
protection detection circuitry can also lead to a protection).
State Description mode Display
LED (Red) Disabled
protections
5
TV On: TV-set
operates, un-
blanked picture Wait 1s,
flash 5 x -
3
Semi stdby-mode:
SSB is powered by
the stdby-supply Wait 1s,
flash 3 x 18, 16, 6, 2 &
1
1 High power stdby:
TV-set in stdby-
mode Wait 1s,
flash 1 x 4 & 5
0 Low power stdby:
5V2/3V3 present, uP
in stdbymode On
CL 16432044_037.eps
140501
CL96532156_029.eps
190600
PC VCR I2C Power
9V DC
R
L
AUDIO EXTERNAL 1
EXTERNAL 2
SERVICE
CONNECTOR
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