3-6
No SW_FD(+)
Check D121 on SMPS
Board and Replace
Check Q163 and
Replace
Is the VCC (FD+) sup-
plied to Q163 Collector ?
Is there about 5.3V at R184
and Q153 Collector ?
Is the VCC (5.3V) sup-
plied to Q153 Emitor ?
NO
NO
Check 5.3VA on
SMPS Board
NO
Check the ‘STANBY
H’ signal from µ-COM
NO
YES
YES
YES
Is there about 0V
at Q153 Base ?
YES
Check Q153 and
Replace
YES
No SW_12VG
Check D124 on SMPS
Board and Replace
Check Q165 and
Replace
Is the VCC (14V) sup-
plied to Q165 Collector?
Is there about 12.5V at
ZD152 & Q165 Base?
Is the VCC (33V) sup-
plied to Q160 Emitor?
NO
NO
Check D126 on SMPS
Board and Replace
NO
Check Q160 and
Replace
NO
Check SW_5.3VA
NO
YES
YES
YES
Is there about 0V at
Q160 Base?
YES
Is there about 5.3V
at Q166 Base?
YES
Check Q166 and
Replace
YES
No 1.25V
Check D155 and
2.5V power supply
Check Q159 and
Replace
Is the VCC (2V) supplied
to Q154 Emitor ?
Is there about 2V ~ 2.5V at
Q154 Base and IC154 pin 4?
Is the VCC (3.3V) sup-
plied IC154 pin 1,2,8 ?
NO
NO
Check 3.3V power
supply
NO
YES
YES
YES
Check IC154 and
Replace
YES
No 1.8V
Check 3.3V power
supply
Check Q159 and
Replace
Is the VCC (3.3V) supplied to Q159
Emitor And IC154 pin 1,2,8 ?
Is there about 3V ~ 3.3V at
Q159 Base and IC154 pin 3 ?
Check IC154 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: ......