Philips LX7000SA Service Manual page 11

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SERVICE TEST PROGRAM
ADC
TUNER
TEST TEST
N
SOURCE
Button pressed?
Y
Display shows
"ADC1 Value"
(Input Line - Key0)
N
SOURCE
Button pressed?
Y
copied to the RAM (see Table 1)
Display shows
"ADC2 Value"
(Input Line - Key1)
N
SOURCE
Button pressed?
Y
Display shows
"ADC3 Value"
(Input Line - AmNTC)
N
SOURCE
Button pressed?
Y
Display shows
"ADC4 Value"
(Input Line - Option)
N
9
Button pressed?
Y
ADC Test is used for checking the ADC inputs
to the microprocessor.
The display shows an ADC value between 0
and 255 for an input signal between 0 and 5V.
Note :
If the ADC value on the NTC line is below 69,
the set will go to standby mode because the
temperature is too high.
3-1
To start service test program
hold T & SOURCE
plugging in the mains cord
QUARTZ
TEST
N N
PROG CLOCK/TIMER
Button pressed? Button pressed?
Y Y
Display Tuner Version
Display shows
"ccc"
32K
Output on Quartz-Test-Pin
pin 19 of uP = 2048Hz
N
PROG
Button pressed?
N
CLOCK/TIMER
Button pressed?
Y
Service frequencies are
Y
Tuner works normally except:
Display shows
PROGRAM button
12M
Output on Quartz-Test-Pin
pin 19 of uP = 2,929.6875Hz
N
Disconnect
Mains cord ?
9
N
Button pressed?
Y
Y
Service Mode left
USA
Europe Oversea
PRESET "USA" "OSE"
"EUR"
1 87.5MHz 87.5MHz 87.5MHz
2 108MHz 108MHz 108MHz
3 531kHz 530kHz 531/530kHz*
4 1602kHz 1700kHz 1602/1700kHz*
5 558kHz 560kHz 558/560kHz*
6 1494kHz 1500kHz 1494/1500kHz*
98MHz
7 87.5MHz 87.5/98MHz*
87.5MHz
8 87.5MHz 87.5MHz
87.5MHz
9 87.5MHz 87.5MHz
10 87.5MHz 87.5MHz
87.5MHz
11 98MHz 87.5MHz 98/87.5MHz*
Table 1
Note: * Depending on the selected grid frequency (9 or 10kHz).
By holding the "SOURCE" and "PROG" buttons depressed
while switching on the Mains supply, the tuning grid frequency
is toggled between 9kHz and 10kHz for the Oversea (/21)
version.
depressed while
S refers to Service Mode
Display shows the
ROM version
V refers to Version
"S-Vyy"
(Main menu)
yy refers to Software version number of the uProcessor
(counting up from 01 to 99)
DISPLAY
TEST
N
BII
Button pressed?
Y
Display shows Figure 1
and switch all LEDs on
(see Table 2 - Pattern 1)
N
BII
Button pressed?
Y
Display shows Figure 2
and switch alternate LEDs on
(see Table 2 - Pattern 2)
N
BII
Button pressed?
Y
Display shows Figure 3
and switch all LEDs off
(see Table 2 - Pattern 3)
N
9
Button pressed?
Y
LEDs
Pattern 1 Pattern 2 Pattern 3
SACD
ON OFF
STANDBY / ECO POWER GREEN RED
LCD BACKLIGHT
ON ON
Table 2
Published in Heiloo, Holland.
3-1
Figure 1
Figure 2 Figure 3
TEST Activated with ACTION
T
EEPROM TEST A test pattern will be sent to the EEPROM.
"PASS" is displayed if the uProcessor read back
the test pattern correctly, otherwise "FAIL" will be
9 to Exit
displayed.
OFF
S
EEPROM FORMAT Load default data. Display shows "NEW" for 1 second.
TEST
Caution!
OFF
All presets from the customer will be lost!!
ON
Pressing this button will toggle between the status
AUTO STANDBY CENTER -
TOGGLE (RC) "AUTO STANDBY ON" and "AUTO STANDBY OFF".
The status will scroll once across the Display.
ROTARY Rotary Volume Display shows value for 2 seconds.
ENCODER TEST Knob
Values increases or decreases in steps of 1 until
0 (Volume Min.) or 40 (Volume Max.) is reached.
LEAVE SERVICE Disconnect
mains cord
TEST PROGRAM
12/21/15
Various
other Tests
LX7000SA & LX8000SA_Service Test Program_dd wk0232