
* T748 DISPLAY PART TROUBLESHOOTING
O
N
O
N
K
O
K
O
G
.
N
G
.
N
K
O
K
O
NO LED LIGHT UP
IS THE POWER
CORD
CONNECTED?
PLUG THE POWER
CORD INTO THE
WALL OUTLET
SECURELY
CHECK AT
CN501 PIN15
"H"
CHECK POWER
SUPPLY CIRCUIT
CHECK HOST
MCU(IC101) PART
CHECK & REPLACE
LED(D5032) or
Q5031 Q5032 Q5033
NO DISPLAY ON VFD
CHECK AT
CN502 PIN1,
PIN3, PIN5
CHECK POWER
SUPPLY CIRCUIT
CHECK AT
FIP51 PIN1~2,
58, 61~62
CHECK OPEN
CIRCUIT or SHORT
CIRCUIT
CHECK & REPLACE VFD
CHECK & REPLACE
LED(D5032) or
Q5031,Q5032,Q5033,
Q5036,Q5037
CHECK & REPLACE VFD
2-88
Summary of Contents for T 748
Page 1: ...L A U N A M E C I V R E S AV Surround Sound Receiver T748 AV Surround Sound Receiver T748 ...
Page 6: ...DISASSEMBLY REMOVAL OF FRONT PANEL 1 6 ...
Page 7: ...PRINCIPAL PART LOCATION 1 7 ...
Page 18: ...IC 211 MX29LV32DTTI 70G FLASH OF DSP 2 6 ...
Page 19: ...2 7 ...
Page 29: ...2 17 BLOCK DIAGRAM ...
Page 40: ...IC 913 IC 918 TC74VCX541FT OCTAL BUS BUFFER 2 28 ...
Page 44: ...BLOCK DIAGRAM MCU DSP PART 2 32 2 33 ...
Page 45: ...BLOCK DIAGRAM AUDIO PART 2 34 2 35 ...
Page 46: ...BLOCK DIAGRAM HDMI PART 2 36 2 37 ...
Page 62: ...2 68 2 69 PRINTED CIRCUIT BOARD FRONT TOP VIEW ...
Page 63: ...2 70 2 71 FRONT BOTTOM VIEW ...
Page 64: ...2 72 2 73 INPUT TOP VIEW ...
Page 65: ...2 74 2 75 INPUT BOTTOM VIEW ...
Page 66: ...2 76 2 77 MAIN TOP VIEW ...
Page 67: ...2 78 2 79 MAIN BOTTOM VIEW ...
Page 68: ...2 80 2 81 SUB TOP VIEW ...
Page 69: ...2 82 2 83 SUB BOTTOM VIEW ...