Philips 7592, Service Manual

Page: 52 / 323

Service Default Mode (SDM)
Introduction
The Service Default Mode (SDM) is a technical aid for the service technician. The Service Default Mode (SDM) establishes
fixed, repeatable settings of customer controls, which allow consistent measurements to be made. The SDM also initiates the
blinking LED procedure and, if necessary, overrides the 5V protection.
The SDM places the set in the following pre-defined conditions:
•
Tuning frequency set to 61.25 MHz (channel 3).
•
Volume level set to 25% (of the maximum volume level).
•
Other picture and sound settings set to 50% (mid-range)
The following functions are turned off in SDM (and after leaving SDM):
•
Timer
•
Sleep timer
The following functions are disabled during SDM (and enabled after leaving SDM):
•
Parental lock
•
Blue mute
•
Hospitality Mode
•
No-ident Timer (normally the set is automatically switched off when no video signal (IDENT) was received for 15 minutes).
All other controls operate normally.
Entering Service Default Mode
To enter the Service Default Mode, press the following key sequence on the remote control transmitter:
0-6-2-5-9-6-Menu
Do not allow the display to time out between entries while keying the sequence.
It is also possible to enter the Service Default Mode by temporarily short-circuiting jumpers 9261 and 9262 while turning the set
on By shorting jumpers 9261 and 9262 while turning the set on.
Note: Entry into SDM by temporarily shorting jumper 9261 and 9262 while turning the set on, the 5V protection will be
disabled.
CAUTION!
Overriding the 5V protection should only be used for a short period of time. In case of S/W protections
(error 1-4) the set will shutdown after 15 sec.
Upon entry into the Service Default Mode, the letters “SDM” will be displayed at the upper right corner of the screen.