3-3
No 5V for HDD &
DVD Drive
Check D125 and
Replace
Is there about 5.5V
at the IC156 pin1?
Is there about 4V ~ 5V
at the IC156 pin 4?
NO
NO
Check the ‘PWR CTL
“H”’ signal from µ-COM
YES
YES
Check the IC156
and Replace
YES
No 12V for HDD &
DVD Drive
Check D124 and
Replace
Check the ‘PWR CTL
“H”’ signal from µ-COM
Is there about 13.5V
at the IC155 pin1?
Is there about 4V ~ 5V
at the IC155 pin 4?
Check the IC155
and Replace
NO
NO
YES
YES
YES
Summary of Contents for HDR688X
Page 27: ......
Page 43: ...3 45 3 46 2 SMPS 2 CIRCUIT DIAGRAM A B C D E F G H I J K L M N O P Q R S T ...
Page 44: ...3 47 3 48 3 MPEG CIRCUIT DIAGRAM A B C D E F G H I J K L M N O P Q R S T ...
Page 45: ...3 49 3 50 4 FLASH DDR CIRCUIT DIAGRAM A B C D E F G H I J K L M N O P Q R S T ...
Page 46: ...3 51 3 52 5 RESET 1394 JEPG CIRCUIT DIAGRAM A B C D E F G H I J K L M N O P Q R S T ...
Page 47: ...3 53 3 54 A B C D E F G H I J K L M N O P Q R S T 6 ATAPI MEMORY CARD CIRCUIT DIAGRAM ...
Page 48: ...3 55 3 56 7 I O µ COM CIRCUIT DIAGRAM A B C D E F G H I J K L M N O P Q R S T ...
Page 49: ...3 57 3 58 8 TUNER MPX ADC DAC JACK CIRCUIT DIAGRAM A B C D E F G H I J K L M N O P Q R S T ...
Page 50: ...3 59 3 60 9 DECODER CIRCUIT DIAGRAM A B C D E F G H I J K L M N O P Q R S T ...
Page 51: ...3 61 3 62 10 TIMER CIRCUIT DIAGRAM A B C D E F G H I J K L M N O P Q R S T ...
Page 56: ...3 71 3 72 PRINTED CIRCUIT DIAGRAMS 1 MAIN P C BOARD TOP VIEW BOTTOM VIEW ...
Page 57: ...3 73 3 74 2 I O P C BOARD TOP VIEW ...
Page 58: ...3 75 3 76 BOTTOM VIEW 2 I O P C BOARD ...
Page 59: ...3 77 3 78 3 POWER P C BOARD ...
Page 61: ...3 81 3 82 6 HDMI P C BOARD OPTIONAL PARTS TOP VIEW BOTTOM VIEW ...
Page 78: ...4 17 2 DISC SPECIFICATION 3 DISC MATERIALS 1 DVD ROM Single Layer Dual Layer ...
Page 103: ......
Page 104: ...4 42 4 43 CIRCUIT DIAGRAMS 1 DSP CIRCUIT DIAGRAM A B C D E F G H I J K L M N O P Q R S T ...
Page 105: ...4 44 4 45 2 RF CIRCUIT DIAGRAM A B C D E F G H I J K L M N O P Q R S T ...
Page 106: ...4 46 4 47 3 DRIVE CIRCUIT DIAGRAM A B C D E F G H I J K L M N O P Q R S T ...
Page 108: ...4 50 4 51 PRINTED CIRCUIT DIAGRAMS 1 MAIN P C BOARD TOP VIEW ...
Page 109: ...4 52 4 53 2 MAIN P C BOARD BOTTOM VIEW ...
Page 141: ......
Page 175: ......