Esquema Del Circuito De Voltaje - LG BD550 Manual De Servicio

ESQUEMA DEL CIRCUITO DE VOLTAJE

1. ICs
Pin No. Desc. Voltage EE Mode
IC201 (MP2377)
1 Vout 1.08 -
8 Vin 11.34 -
IC202 (MP8706)
1 Vin 11.4 -
3 Vout 1.51 -
IC203 (LM1108SF-3.3)
1 Vout 3.24 -
2 Vin 5.14 -
IC204 (KIA1112ST)
2 Vot 1.19 -
3 Vin 3.3 -
IC207 (LM39102D)
2 Vin 4.3 -
3 Vout 3.31 -
IC502 (KIA7029AT) - Top side
1 Vin 3.25 -
3 Vot 2.95 -
IC603 NAND(Numonyx) - Top side
12 VCC 3.29 -
37 VCC 3.29 -
IC701 (LM1117) - Top side
2 Vout 8.21 8.21
3 Vin 11.24 11.21
IC702 (R2A30209SP) - Top side
5 VM2 11.23 11.22
22 VM1 11.27 11.21
26 VM3 11.22 11.22
32 VCC 5.13 5.11
IC703 (LB1848M)
1 VCC 5.14 5.13
IC801 OP AMP(MC4580)
Play Mode
3 IN1(+) 2.58 -
5 IN2(-) 2.58 -
8 VCC+ 10.04 -
No Play Mode
3 IN1(+) 2.58 -
5 IN2(-) 2.58 -
8 VCC+ 10.04 -
2. TRs
Pin No. Desc. Voltage Remarks
Q271
- Emitter 11.4
- Base 0.01
- Collector 11.35
Q272
- Emitter 0.01
- Base 3.17
- Collector 0.014
Q801 (KTC3875S)
Play Mode
- Emitter 0
- Base 0
- Collector 2Vrms
No Play Mode
- Emitter 0
- Base 0.7
- Collector 0
Q802 (KTC3875S)
Play Mode
- Emitter 0
- Base 0
- Collector 2Vrms
No Play Mode
- Emitter 0
- Base 0.7
- Collector 0
Q803 (2SA1037AK)
Play Mode
- Emitter 3.27
- Base 3.28
- Collector 0
No Play Mode
- Emitter 3.27
- Base 2.6
- Collector 3.19
Q804 (KTC3875S)
Play Mode
- Emitter 0
- Base 0
- Collector 3.28
No Play Mode
- Emitter 0
- Base 0.72
- Collector 0
3-81
MEMORÁNDUM
3-82