background image

14

C3
100UF/25V

R31
8.2K

+

-

U2A
4558

3

2

1

8

4

GND

C21
332

C15
332

C6
104

C12

1UF/16V

C10
101

R24
100

VAM+

C5
100UF/25V

MIN

D1

IN4148

C11
1UF/16V

C28

100UF/16V

R10
10K

R17
13K

R2
1.2K

RP1
10K

C2

22UF/16V

M-DET

C4
104

C27
47UF/16V

R21
1.5K

C23
683

MIN

V2
9015

VCC

C26
104

R8
15K

VAM-

R3

47K

C18

4.7UF/50V

R16

1K

R12
5.1K

VCC

R15
15K

R1
2.2K

R27
47K

VCC

C29
104

+

-

U2B

4558

5

6

7

8

4

C16
561

C13

4.7UF/16V

C14

4.7UF/50V

C17
4.7UF/50V

C20
561

C19

OPEN/103

M-DET

6 * 2 . 5

JP1

1
2
3
4
5
6

VAM+

R7
15K

R9
10K

R11
12k

C8
104

C7
101

C1
104

C30

SHORT/1UF

R28
10K

R20
15K

U1
PT2399

1

2

3

4

5

6

7

8

9

1

0

11

1

2

1

3

1

4

1

5

1

6

V

C

C

R

E

F

A

G

N

D

D

G

N

D

C

L

K

-O

V

C

O

C

C

1

C

C

0

O

P

1

-O

U

T

O

P

1

-I

N

O

P

2

-I

N

O

P

2

-O

U

T

L

P

F

2

-I

N

L

P

F

2

-O

U

T

L

P

F

1

-O

U

T

L

P

F

1

-I

N

R6
1K

R5
2.2K

RP2

10K

R23
150K

MIC2

1

2

3

1

2

3

V1

9014

1

2

3

VAM-

R25
3K3

C25
104

C22
683

MIC1

1

2

3

1

2

3

R30
10K

R14
10K

R19

1 M

C24
4.7UF/50V

C9
22UF/16V

R22
10K

R18
10K

R26
47K

R13
10K

Karaoke schematic circuit

Содержание DVD-F70

Страница 1: ...SERVICE MANUAL DVD F70 DVD F61...

Страница 2: ...r schematic circuit 2 11 Front control board schematic circuit 12 Karaoke schematic circuit 13 Figure 1 Schematic Diagram 2 Figure 2 Basic Circuit Diagram 3 Table of Contents 1 Output schematic circui...

Страница 3: ...A AG MICD HR 24V CON101 ASPDIF 6 M R TRIN AC1 A BV OARD VSCK CN2 JP1 1 AC2 9 15 VCC SL GND 24V GND VSDA D LO VD AD LS 2 AC1 VCC M R CN4 CVBS AG Cb B GND VA PCON SP MIC HL SUB KARAOKE BOARD 3 3 3V CN8...

Страница 4: ...MT1369 VFD KEY 1M 8 PT2222 001 VIDEO LPF DRIVE SPDIF OUT TOP233Y TD F50 F61 F62 F63 TEA1523P TD F70 F71 RF POWER SUPPLY 2 16Mbit PT2399 ECHO MC4558 DECODER SERVO D LO VA DD MC4558 MIC AMP AUDIO D A M...

Страница 5: ...cillator to measure this portion an isolated transformer must be connected Circuit of power supply may output the following power sources a If 5V voltage varies out of the permissible range check whet...

Страница 6: ...ed or erode d If the above parts are normal replace U1 or the loader 3 Troubleshooting and service of decoding part a No video no audio no display on VFD and no operation of keys a Check whether the p...

Страница 7: ...r IC e Check whether the signals of the 17th 19th 21st 23rd 25th and 27th pins of U5 on the decoder board are normal If not check the signals of the pins from the 2nd to the 7th If the clock signals o...

Страница 8: ...her the welding from the 12th 13th 15th pins of U301 to the 37th pin is in good conditions Check whether D301 D303 on the front board are damaged whether circuit is disconnected and whether R309 R310...

Страница 9: ...R VCC PDd FO FO TR TR F V1P4 R31 0 open V1P4 LOAD C57 0 1u C23 1u A RFL R13 330k D1 1N4148 Q5 9013 V2P8 V1P4 SP Q4 9012 HTRC 2 MICD MDI1 FOSO C6 100u RFOP HTRC R18 20k R34 0 0805 B B RVCC BDO C47 0 01...

Страница 10: ...IOA0 IOA1 DVDD2 IOA2 IOA3 IOA4 IOA5 IOA6 IOA7 A16 A17 IOA18 IOA19 DMVSS 5 VSDA VCC5 ADIN ASDAT 0 2 A15 ABCK GND VSYNC HTRC TRSO C85 10n C97 22pF C114 0 1u DCLK CAS DQ26 V2P8 R38 0 URST GND FOSO VSCK 4...

Страница 11: ...0 7 B DMA3 DMA7 Y G C146 47u 3 RDQ27 RDQ19 SCL DMA8 DMA3 3 3 HSYNC SDCKE RDQ14 RDQM2 RDQ24 RDQ7 RDQ6 DMA2 Sy C144 0 1u Y DBA0 RDQM2 CAS DQ21 RDQ23 AD5 DMA8 SDCKE GNDV 5VP A1 DBA0 5VP A10 PCE MA10 Y5 R...

Страница 12: ...VSYNC C193 0 1uF R130 33R L2 FB AXIAL VA 1 ASDT1 C164 150pF VSDA VSCK C_OUT R146 3 3K 1369P3_1 SR VCC R100 2 2K L4 FERB 0805 VA 1 LS R104 10K R139 0R OPEN ASDAT 0 2 R1 VCC ASDT0 C209 10uF 16v ABCK ASD...

Страница 13: ...2 0 2 1 2 2 2 3 2 4 2 5 2 6 2 7 2 8 2 9 3 0 3 1 3 2 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 4 9 5 0 5 1 5 2 5 3 5 4 5 5 5 6 5 7 5 8 5 9 6 0 6 1 6 2 6 3 6 4 SG1 P1 SG2 P2 SG3 P3 SG4 P4 SG5 SG6...

Страница 14: ...40 41 42 43 44 SW1 SW2 SW3 SW4 SDout SDin GND SCLK CS KEY1 KEY2 KEY3 KEY4 VDD SEG1 K1 SEG2 K2 SEG3 K3 SEG4 K4 SEG5 K5 SEG6 K6 SEG7 SEG8 SEG9 SEG10 SEG11 SEG12 VEE SEG13 SEG14 SEG15 SEG16 G6 G5 G4 G3 G...

Страница 15: ...B 4558 5 6 7 8 4 C16 561 C13 4 7UF 16V C14 4 7UF 50V C17 4 7UF 50V C20 561 C19 OPEN 103 M DET 6 2 5 JP1 1 2 3 4 5 6 VAM R7 15K R9 10K R11 12k C8 104 C7 101 C1 104 C30 SHORT 1UF R28 10K R20 15K U1 PT23...

Страница 16: ...1 C17 10uF 16v VMODE MIXR R2 0 PSCAN C0N9 2 0 1 2 3 4 5 6 R18 470R FL Cr R MIXL R12 470R SUB1 RS Cb R R22 470R HS SUB1 R7 1K R13 470R Cr B C5 OPEN 220P CN101 con20 1 25 1 2 3 4 5 6 7 8 9 10 11 12 13 1...

Страница 17: ...EA1523P 4 5 1 2 8 3 6 REG AUX VCC GND Drain RC Source C417 100uF 16V L404 3 3uH Lp 960uH C410 102 250Vac C406 0 1uF D411 FR104 C411 223 R425 1 10 W 0 D409 RU3YX R415 22k L402 10uH Q403 2N5551 R413 NU...

Отзывы: