ICF-CD863V - Sony Audio Service Manual (repair manual). Page 13

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13
ICF-CD863V
Adjustment Location:
AUTO BRIGHTNESS ADJUSTMENT
Connecting:
1. Set to power off state.
2. Connect a digital voltmeter to TP (DIMMER) and TP (GND)
on the LCD board and confirm that the voltage is 0 V.
3. Turn on the power.
4. Connect the digital voltmeter to TP (DIMMER) and TP (GND)
on the LCD board and adjust RV401 so that the voltage be-
comes 1.5 
± 0.05 V.
5. Turn off the power.
6. Applied sufficient light to IC403 (brightness sensor) on the
DIMMER board and confirm that the voltage is 3.3 
± 0.3 V.
7. Short the BP404.
Adjustment Location:
digital voltmeter
TP (DIMMER)
TP (GND)
100 k
LCD board
+
– MAIN BOARD (Component Side) –
L1 AM VCO Voltage Adjustment
RV1 FM Stereo Adjustment
RV2 AM IF Adjustment
AM 
Tracking 
Adjustment
CT1
L5    
}
FM/TV (2 – 6 ch)
Tracking Adjustment
L2
CT2 
}
TV (7 – 13 ch)
WEATHER (1 – 7 ch)
Tracking Adjustment
CT3
L3    
}
– MAIN BOARD (Conductor Side) –
TP (ANT)
TP (FM GND)
TP (RADIO B+)
TP (VT)
TP (FM ST)
TP (AM GND)
– LCD BOARD (Component Side) –
RV401 Auto Brightness Adjustment
– LCD BOARD (Conductor Side) –
TP (GND)
TP (DIMMER)
– DIMMER BOARD (Conductor Side) –
IC403
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