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Samsung Electronics
6-1
6-1 The Amp Section
6-1-1 Power Malfunction
6. Troubleshooting
Main PCB
µ
-com VDD(5V)
normal?
UIC1 pin no. 18,47,90
O
Front PCB
X
Main PCB POSNS
voltage normal ?
(pin no. 28 ; 4.5V)
X
Check the Front PCB ; UQ1
Check the Main PCB ;
RD3,RZD4,PC11,PR33
PR9,PR10,PC12
Check the Power PCB ;
PIC2,PR4,3
X
RF3,4(T2A 250V)
Main PCB UIC5(78L05) IN : 8V
Input voltage normal ?
O
X
Replace UIC5
Does UX2(12MHz)
oscillate ?
O
O
At the base of
Main PCB ; PQ3
Base High Display ?
Replace
µ
-com
X
X
O
Front PCB,
When the power is
ON 'H', displays
at pin no.84 ? (5V)
Connect Front PCB and Main PCB &
Check the connector Main PCB
Wafer CCW2,CMW2
O
Replace
µ
-com
O
Содержание MAX-670
Страница 44: ......
Страница 45: ...9 Block Diagrams 9 1 Amp and Tuner Samsung Electronics 9 1 ...
Страница 46: ...DIC2 DIC1 JIC1 KL1L UIC1 UIC2 JIC2 RIC1 9 2 Cassette Deck 9 2 Samsung Electronics Block Diagrams ...
Страница 47: ...9 3 CD Samsung Electronics 9 3 Block Diagrams ...
Страница 63: ...10 1 Samsung Electronics 10 PCB Diagrams 10 1 Amp and Tuner Section 10 1 1 Main ...
Страница 64: ...Samsung Electronics 10 2 PCB Diagrams ...
Страница 65: ...10 3 Samsung Electronics PCB Diagrams 10 1 2 Front ...
Страница 66: ...Samsung Electronics 10 4 PCB Diagrams 10 2 Cassette Deck and CD Section 10 2 1 Cassette Deck ...
Страница 67: ...10 5 Samsung Electronics PCB Diagrams ...
Страница 68: ...Samsung Electronics 10 6 10 2 2 Front 10 2 3 6 1 Key 10 2 4 Tape Key PCB Diagrams ...
Страница 69: ...10 3 3 SUB 10 7 Samsunge Electronics 10 3 CD 10 3 1 Top View 10 3 2 Bottom View PCB Diagrams ...
Страница 72: ...FIC1 12 1 Samsung Electronics 12 Schematic Diagrams 12 1 Amp and Tuner Section 12 1 1 Main ...
Страница 73: ...UIC1 UIC2 UIC3 Samsung Electronics 12 2 12 1 2 Front Schematic Diagrams ...
Страница 74: ...JIC2 12 3 Samsung Electronics 12 2 Cassette Deck Section Schematic Diagrams ...
Страница 75: ...Samsung Electronics 12 4 12 3 CD Schematic Diagrams 1 1 3 2 2 3 ...