-20-
IC801
52
FAN Fail Detect (To IC1821 37 )
FAN FAIL
55
Sound AMP. Fail Detect (To IC071 17 )
P FAIL 2
56
Power Fail Detect
(ASSY PWB AUDIO)
P FAIL 3
D1865
9V
D1863/4
12V
D1861/2
30V
54
Power Fail Detect
(ASSY PWB MAIN)
P FAIL 1
D105
5V
D7082/3
2.5VGR
D201/2
3.3V
(ASSY PWB AUDIO)
Q1861/2
(ASSY PWB
AUDIO)
(To IC207)
D603/4
3.3V
D601/2
2.5V
78
Temperature Fail Detect (To IC1821 38 )
TEM. FAIL
D301/2
2.5VST
D7080/1
3.3VYC
■
Power Fail Circuit
CPU (IC801) is programmed that the set goes to standby mode when there is circuit fail as
below.
1. AUDIO AMP FAIL(2) : Detected the fail of Audio AMP IC (IC071)
2. POWER FAIL (3)
: Detected the voltage fail in Audio Unit (3 points)
3. POWER FAIL (1)
: Detected the voltage fail in Audio Unit (1 point) and Main Unit (4 points).
4. OTHERS
TEMPERATURE FAIL : Detected the temperature fail ( about 80 degree) by thermal sensor IC (IC1981). CPU
communicates to FAN & Sensor Control IC (IC1821) for detection.
FAN FAIL
: Detected the fan fail by the communication to FAN & Sensor Control IC (IC1821).
(The set does not go to standby mode in this fail. Display Only.)