Philips HTS3455/51, Service Manual

Page: 14 / 53

EN 14 3139 785 31590 5. Service Test Program
5. Service Test Program
To start service test program
open the tray with remote control
or front panel key, while plugging
in the mains cord press 2, 5 8 on
remote control, the tray will close
by itself and the set will display
shown “S-Vxx-yy”
Display shows
“SERVICE”
followed by ROM version
“S-Vxx-yy”
S refers to Service Mode
V refers to Version
xx refers to Software version number of BEA
(counting up from 01 to 99)
yy refers to Software version number of Front uP
(counting up from 01 to 99)
4.1 Display Test
Purpose:
This test is used to check the driving circuits, the display and whether there are
any short-circuits, open-circuits or any other defects.
Player:
Following display patterns are used to test the display and its connections to
μ
P.
Pattern 1: Default: All display control pins are ON
- to check the open-circuits
Pattern 2: Alternate display control pins are on (Test Pattern: 0x55)
- to check the short-circuits on Data port
Receiver:
Following display patterns are used to test the display and its connections to
μ
P.
Pattern 1: Default: All display control pins are ON
- to check the open-circuits
Pattern 2: Alternate display control pins are on (Test Pattern: 0x55)
- to check the short-circuits on Data port
key
" DisplayTest "
triggered?
n
y
Activate and display
" Pattern1 "
key
" DisplayTest "
triggered?
n
y
Activate and display
" Pattern2 "
Main Menu
Display Test
key
" "
triggered?
n
y