Philips L04HU Service Manual Download Page 9

Page: 9 / 117

Service Modes, Error Codes, and Fault Finding

EN 9

L04HU AA

Service Modes, Error Codes, and Fault Finding

Index of this chapter:

Test Points

Service Modes

Problems and Solving Tips (related to CSM)

ComPair

Error Codes

The Blinking LED Procedure

Protections

Fault Finding and Repair Tips

5.1

Test Points

This chassis is equipped with test points in the service printing.
In the schematics test points are identified with a rectangle box
around Fxxx or Ixxx. These test points are specifically
mentioned in the “Test Point Overview” as “half moons” with a
dot in the center.

Table 5-1 Test point overview

Perform measurements under the following conditions:

•

Television set in Service Default Alignment Mode.

•

Video input: Color bar signal.

•

Audio input: 3 kHz left channel, 1 kHz right channel.

5.2

Service Modes

Service Default Alignment Mode (SDAM) offers several
features for the service technician, while the Customer Service
Mode (CSM) is used for communication between dealer and
customer.

5.2.1

Service Default Alignment Mode (SDAM)

Purpose

•

To change option settings.

•

To create a predefined setting to get the same
measurement results as given in this manual.

•

To display / clear the error code buffer when leaving SDAM
with “standby” key on remote control.

•

To override SW protections.

•

To perform alignments.

•

To start the blinking LED procedure.

Specifications

•

Tuning frequency:

–

61.25 MHz (channel 3)

•

Colour system:

–

NTSC

•

All picture settings at 50 % (brightness, colour contrast,
hue).

•

Bass, treble and balance at 50 %; volume at 25 %.

•

All service-unfriendly modes (if present) are disabled, like:

–

(sleep) timer,

–

child/parental lock,

–

blue mute,

–

hotel/hospitality mode

–

auto switch-off (when no IDENT video signal is
received for 15 minutes),

–

skip / blank of non-favourite presets / channels,

–

auto store of personal presets,

–

auto user menu time-out.

•

Operation hours counter.

•

Software version.

•

Option settings.

•

Error buffer reading and erasing.

•

Software alignments.

How to enter SDAM

Use one of the following methods:

•

Use a System 7 remote control type T374AH (RC-
transmitter RG4172BK) and key in the code

‘062596’

directly followed by the

‘M’

(menu) button or

•

Short circuit jumper wires 9252 and 9275 on the mono
carrier (see Fig. 8-1) and apply AC power. Then press the
power button (remove the short circuit after start-up).

Caution

: Entering SDAM by short circuiting wires 9252 and

9275 will override the +8V-protection. Do this only for a short
period. When doing this, the service-technician must know
exactly what he is doing, as it could lead to damaging the set.

After activating SDAM, the following screen is visible, with S at
the upper right side for recognition.

SDAM Menu

Figure 5-1

LLLL

This is the operation hours counter. It counts the normal
operation hours, not the standby hours.

AAAABC-X.Y

This is the software identification of the main micro
controller:

–

A = the project name (L04H).

–

B = the region: E= Europe, A= Asia Pacific, U= NAFTA,
L= LATAM.

–

C = the feature and language