3-6
No 33V
Is the Vcc(33V) sup-
plied to Q161 Emittor?
Check or Replace
D121
Is Q162 Base
‘H’?
Check the PWR CTL
“H” signal from µ-com
Check or Replace
Q161
YES
YES
YES
(5) No 33V
No 5.0V_D
Check or Replace
D125
Is the Vcc(5.3V) sup-
plied to Q165 Emittor?
Check or Replace
Q165
Is the Q162 Base
‘H’?
NO
NO
Check the PWR CTL
“H” signal from µ-com
YES
YES
YES
(2) No 5.0V_D
No 5.0V_T
Check or Replace
D125
Check the PWR CTL
“H” signal from µ-com
Is the Vcc(5.3V) sup-
plied to Q163 Emittor?
Is the Q162 Base
‘H’?
Check or Replace
Q163
NO
NO
YES
YES
YES
(3) No 5.0V_T
No 3.3V
Check or Replace
D123
Is there about 3.8V
at IC131 pin1?
Is there about 3.3V~5V
at IC131 pin4?
NO
NO
Check the PWR CTL
“H” signal from µ-com
NO
NO
YES
YES
Check IC131
and Replace
YES
(4) No 3.3V
Summary of Contents for ZDX-313
Page 12: ......
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Page 32: ......
Page 40: ...3 35 3 36 2 TU IF CIRCUIT DIAGRAM A B C D E F G H I J K L M N O P Q R S T PB REC...
Page 43: ...3 41 3 42 5 JACK 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 53 3 54 PRINTED CIRCUIT DIAGRAMS 1 MAIN P C BOARD TOP SIDE...
Page 50: ...3 55 LOCATION GUIDE...
Page 51: ...3 56 LOCATION GUIDE...
Page 52: ...3 57 3 58 2 MAIN P C BOARD BOTTOM SIDE...
Page 53: ...3 59 3 60 4 KEY P C BOARD LOCATION GUIDE 3 POWER P C BOARD LOCATION GUIDE...
Page 54: ......
Page 70: ...3 76 12 ZR36868 AUDIO OUTPUT TO AUDIO DAC 2 COMPOSITE VIDEO SIGNAL FIG 11 2 FIG 12 1...
Page 71: ...3 77 FIG 13 1 13 AUDIO OUTPUT FROM AUDIO DAC...
Page 75: ...3 81 3 82 A B C D E F G H I J K L M N O P Q R S T CIRCUIT DIAGRAMS 1 SYSTEM CIRCUIT DIAGRAM...
Page 76: ...3 83 3 84 2 SERVO CIRCUIT DIAGRAM A B C D E F G H I J K L M N O P Q R S T...
Page 77: ...3 85 3 86 3 AV JACK CIRCUIT DIAGRAM A B C D E F G H I J K L M N O P Q R S T...
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Page 118: ......