2-42
2. AMP POWER SUPPLY ON SMPS BOARD
ELECTRICAL TROUBLESHOOTING GUIDE
No 14 VA.
No 31.5 V / 25 V
Power Line of MAIN PCB is short.
Power Line of MAIN or AMP PCB is short.
Is F901 normal?
Is the P-CTL normal?
Is TH901 normal?
Is the VCC (11 V ~ 25 V) supplied to IC901 pin7?
Is BD901 normal?
Is IC901 normal?
Is the VCC (11 V ~ 25 V) supplied to IC901 pin5?
Is Q902 normal?
Is D955 normal?
Replace F901. (same fuse)
Check the MICOM IC.
Replace TH901.
Is Q901 normal?
Check or replace Q901.
Replace BD901.
Replace IC901.
Is D953 normal?
Replace Q902.
Replace D955.
Check or replace D953.
NO
NO
NO
NO
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
Summary of Contents for BH5140S
Page 15: ...1 14 MEMO ...
Page 63: ...2 48 WAVEFORMS 1 SYSTEM PART 1 IC501 MT8560 X TAL 27 MHz 1 1 ...
Page 65: ...2 50 3 AUDIO PART 1 S PDIF CS8422_AUDIO_SPDIF IN 6 6 ...
Page 66: ...2 51 4 AUDIO PART 2 I2S tjsr ijr syjr kh hW 7 8 9 10 7 8 9 10 ...
Page 67: ...2 52 5 HDMI PART H_SDA 11 H_SCL 12 HDMI_CLK_N 13 HDMI_0_N 14 11 13 12 14 ...
Page 85: ...2 88 2 87 2 MAIN P C BOARD TOP VIEW BOTTOM VIEW ...
Page 86: ...2 90 2 89 3 AMP P C BOARD TOP VIEW BOTTOM VIEW ...
Page 88: ...2 94 2 93 5 FRONT P C BOARD TOP VIEW BOTTOM VIEW ...
Page 89: ...2 96 2 95 MEMO MEMO ...
Page 91: ...3 2 MEMO ...
Page 95: ...4 SPEAKER SECTION 4 1 FRONT CENTER REAR SPEAKER A600 Rear SPK A700 Center SPK A800 Front SPK ...
Page 96: ...A900 4 2 PASSIVE SUBWOOFER ...
Page 97: ...3 10 MEMO ...
Page 109: ...4 12 MEMO ...