Philips F1395 - Page 6

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* FIG.IB
CHECK
SOURCE
SELECTION
NO GOOD
APPLY G_ND
TO TU,CD
C"ASS
SOURCE
SWITCHING - OVER
IS OK ?
OK
FAULT 7418
INPUT
RESISTORS
PROBLEM IN
DIGITAL LOOP
KEEP
'WAVE'
AND'PRESET DOWN'
BUTTON DEPRESSED
WHILE SWITCHING
ON THE SET
NO BACKLIGHT
NO DISPLAY^
^
PART I AL
BREAKDOWN
CHECK
7418 / LCD
FIG.IA
FIG, 2
OK
CHECK SOURCE
SELECTION SWITCHES
CHECK U21
CHECK SUPPLY
OK
CHECK
KEYBOARD
FUNCTIONS
OK
NO CONTROL
PARTIAL CONTROL
CHECK 7418
1/ P PINS 12 - 14
O/ P
PINS 27 - 29
NO
WAVE.
RANGE
OTHER
CHECK 7418
DA .CL , CE
NO GOOD
FIG. 3
CHECK 7110
NO GOOD
PINS 9 , '0
FIG. 5
NO GOOD
FIG. 4
FAULT 7418
SWITCHES
FAULT 7110
LOOP FILTER
OSCILL ATOR
FAULT 7418
7420 , 7110
NO STEREO
INDICATION
CHECK 7411
PIN 23
ST SIG
CHECK 7418
PIN 2 4
STEREO
GND
S^PIN 24
CHECK
STEREO
INDICATION
OK
FAULT
7110
'O'
• O'
NO GOOD
FAULT
TUNER PART
FAULT
DISPLAY
26793
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