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MMR-77

Ref no

PART NO.

DESCRIPTION

Q'TY DWG NO.

REMARK

1

20N6000

BATTERY CASE HOLDER

1

A4-N6-29A

2

20N6010

SPEAKER HOLDER

1

A2-N6-30A

3

20N6030

BAR ANT HOLDER

2

A4-N6-32A

4

20N6060

TUNING SHAFT GEAR

1

A4-N6-35A

5

20N6080

CHASSIS

1

A2-N6-37A

6

20N6090

BUZZER KNOB HOLDER

1

A4-N6-38A

7

20N6100

BAND KNOB SHAFT

1

A4-N6-39A

8

20N6110

BATT.SELECT KNOB HOLDER

1

A3-N6-40A

9

20N61201

TUNING SHAFT

1

A4-N6-41A

10

20N6130

VOLUME KNOB SHAFT

1

A4-N6-42A

11

20N61401

CRANK BASE HOLDER

1

A4-N6-64A

12

20N6150

PIN HOLDER

1

A4-N6-65A

13

20N6160

BACK LIGHT HOLDER

1

A2-N6-31B

14

20N6170

GEAR DRUM

1

A3-N6-33B

15

20N6180

TERMINAL GEAR

1

A3-N6-34B

16

20N6190

POINTER GEAR

1

A3-N6-36B

17

2111005A

SPR CLICK

1

A4-N6-29A

18

21B1110A

ROTARY KNOB RING

2

A4-WR1-52A

19

21N6000

PIN

1

A4-N6-05A

CRANK HANDLE

20

21N6010

BATTERY SPRING

1

A4-N6-45A

21

21N6020

BATTERY C)

1

A4-N6-06A

22

21N6040

CRANK PLATE

1

A4-N6-58A

23

21N6050

CRANK BASE SPRING

2

A4-N6-60A

24

22L4020

HEMELON

2

A4-523-40

25

22N6000

NET

1

A4-N6-54A

26

22N6010

RIBBON

1

A4-N6-55A

BACK COVER

27

23N6000

BATTERY COVER SPONGE

1

A4-N6-44A

28

23N6010

PC PLATE

1

A4-N6-57A

29

24N60001

O-RING 

φ

6

4

A4-N6-02A

30

24N6020

DC JACK SPONGE

1

A4-N6-04A

31

24N6030

SPEAKER PACKING

1

A4-N6-09A

32

24N6040

BATTERY CASE RUBBER-A

2

A4-N6-46A

33

24N6050

BATTERY CASE RUBBER-B

1

A4-N6-47A

34

24N6060

FRONT CABINET PACKING

1

A4-N6-48A

35

24N6070

NIMH BATTERY SPONGE

1

A4-N6-49A

36

24N6080

RUBBER SPACER

2

A4-N6-51A

37

24N6090

PHONE JACK SPONGE

1

A4-N6-56A

38

301N601

FRONT CABINET

1

A1-N6-12A

39

303N601

BACK COVER

1

A1-N6-13A

40

304N601

BATTERY COVER

1

A3-N6-14A

41

305N601

DIAL WINDOW

1

A4-N6-22A

42

306N601

DIAL SCALE LENS

1

A3-N6-23A

43

308N64M

CRANK BASE

1

A3-N6-15A

44

309N64M

CRANK HANDLE

1

A3-N6-16A

45

310N601

CRANK

1

A3-N6-17A

46

311N601

VOLUME KNOB

1

A3-N6-19A

47

312N6011

TUNING KNOB

1

A3-N6-18A

48

313N64M

BAND KNOB

1

A3-N6-20A

49

314N64M

BATTERY SELECT KNOB

1

A3-N6-21A

50

316N601

JACK COVER RUBBER

1

A3-N6-27A

51

316N64M1

FOOT RUBBER

4

A4-N6-28A

52

316N64M3

HAND RUBBER

1

A3-N6-26A

53

318N601

LIGHT KNOB

1

A3-N6-08A

54

325N64M

BUZZER KNOB

1

A3-N6-07A

55

330N601

ROD ANT HOLDER

1

A4-N6-50A

56

331N64M

BAND KNOB HOLDER

1

A3-N6-24A

57

346N601

LAMP HOLDER

1

A3-N6-60A

MECHANICAL PARTS LIST

20

Summary of Contents for MMR-77

Page 1: ...N PCB Top View 11 MAIN PCB Bottom View 12 CONTROL PCB Top View 13 CONTROL PCB Top View 14 Wiring Diagram 15 Troubleshooting Flow Chart 16 17 Electrical Parts List 18 19 Mechanical Parts List 20 21 Exp...

Page 2: ...S N 6dB 90MHz 50 dB 3db Limiting 10mv 80dBu 18 24 dBu Min output 60dBu 1 5 3 mV Tuning Ind Sens 26 32 Auto Scan Stop Sens Stereo indicator Sens dBu Buzzer freq 2 5 0 2 KHz Buzzer Lever 2 5 2 0 VP P S...

Page 3: ...z S N 6dB 26 20 dB Bandwidth 6dB Mod400Hz S N 6dB 4 9 KHz T H D 74dBu m 3 5 Lowest Batt Volt 74dBu m 1 8 2 0 V Hum Modulation 100dBu m dB Tuning Ind Sens 56 62 dBu m Auto Scan Stop Sens dBu m S N Rati...

Page 4: ...BLOCK DIAGRAM 4...

Page 5: ...ep generator in series with a 10uF capacitor to the IC1 pin24 3 Connect the RF output terminal of the AM IF sweep generator in series with a capacitor 0 01uF capacitor to the IC1 pin11 4 Adjust T1 to...

Page 6: ...signal generator to the standard FM band with frequency deviation to 22 5KHz 1KHz modulation 5 With the tuning gang fully closed set signal generator to 87 5MHz 0 5MHz and adjust L3 stretch or squeez...

Page 7: ...of TP1 4 Set frequency of the signal generator to the standard FM band with frequency deviation to 22 5KHz 1KHz modulation 5 Set signal generator to 90MHz and adjust L2 stretch or squeeze for maximum...

Page 8: ...ect the AM signal generator to the loop antenna 4 Set signal generator to 511KHz with 30 modulation set tuning gang fully closed and adjust T2 for T2 for maximum reading on SSVM 5 Set signal generator...

Page 9: ...signal generator to the loop antenna 4 Set signal generator to 600KHz with 30 modulation set tuning to signal and adjust L1 for maximum reading on SSVM 5 Set signal generator to 1400KHz set tuning to...

Page 10: ...TEST POINTS DIAGRAM 10...

Page 11: ...MAIN PCB TOP VIEW 11...

Page 12: ...MAIN PCB BOTTOM VIEW 12...

Page 13: ...CONTROL PCB TOP VIEW 13...

Page 14: ...CONTROL PCB BOTTOM VIEW 14...

Page 15: ...WIRING DIAGRAM 15...

Page 16: ...al and connected to the point between antenna circuit C1 No Yes Check IF waveform Check CF1 t1 No Check C6 and L2 2 Weak sensitivity in AM band Check the antenna circuit and antenna terminal No No Che...

Page 17: ...d on Yes Check Q3 and L4 Check whether the R8 and R10 is 3V DC No Yes Check IC4 Q7 and Q8 Check Q2 and C14 4 Light can not be turned ON Yes Check whether Q103 and Q104 Check whether the PIN5 of IC101...

Page 18: ...1 SW 3 1631050 TACT SW 1P1C 1 SW 2 1631632 TACK SW 130 30gf 5mm 1 SW 102 1631680 A SLIDE SW 1P3C PbF 1 SW 1 1640180 JACK HP TC38 061 01 BLK 1 JK 301 1647150 A DC JACK 595J1 02KBA PbF 1 JK 302 1660281...

Page 19: ...8 34 6130149 CH RD 1 16W 12KJ C PbF 1 R 2 6130154 CH RD 1 16W 33KJ C PbF 1 R 16 6130156 CH RD 1 16W 47KJ C PbF 4 R 6 24 35 108 6130158 CH RD 1 16W 68KJ C PbF 2 R 29 30 6130161 CH RD 1 16W 120KJ C 1 R...

Page 20: ...A4 N6 55A BACK COVER 27 23N6000 BATTERY COVER SPONGE 1 A4 N6 44A 28 23N6010 PC PLATE 1 A4 N6 57A 29 24N60001 O RING 6 4 A4 N6 02A 30 24N6020 DC JACK SPONGE 1 A4 N6 04A 31 24N6030 SPEAKER PACKING 1 A4...

Page 21: ...9102052 SCREW PTP 2 6x5 NI 5 SPEAKERx2 C PCBx1 D PCBx2 65 9102082 SCREW PTP 2 6x8 NI 6 CHASSISx4 B PCBx1 BACK COVERx1 66 9152082 SCREW PTPW 2 6x8 NI 1 CRANK 67 9153082 SCREW PTPW 3x8 NI 2 MOTOR 68 919...

Page 22: ......

Page 23: ...IC CIRCUIT BLOCK DIAGRAM 1 IC1 CXA1619BS 2 IC2 BA10324AF 23...

Page 24: ...3 IC3 XC62AP2002PR 4 IC4 IC101 TC7WH74FK 24...

Page 25: ...23 1 37 1 09 8 0 0 9 1 26 1 27 24 1 42 1 01 9 0 0 41 10 1 26 1 27 25 0 0 10 0 0 34 11 1 26 1 27 26 2 69 2 70 11 0 0 50 12 0 0 27 3 00 3 00 12 0 0 13 0 35 0 28 1 55 1 52 13 0 0 41 14 0 0 29 0 0 14 0 0...

Page 26: ...60 E 3 01 0 B 0 35 1 35 Q9 B 0 2 90 B 0 0 59 Q2 C 0 0 85 C 0 3 63 Q102 C 0 0 E 0 32 2 95 E 0 0 B 0 2 0 55 Q10 B 0 0 60 Q3 C 0 0 C 0 0 E 3 00 0 05 B 0 30 0 60 Q5 C 0 0 E 3 00 3 00 B 3 00 2 31 Q6 C 3 00...

Page 27: ...A 1 3 C A B E C 2 C A IN5817 C A C RLS4148 2SC1623 A Anode C Cathode RB110CT100 RB160M E Emitter C Collector B Base 2SB815 2SA812 Diodes Transistors SEMICONDUCTOR LEAD IDENTIFICATIONS 27...

Page 28: ...SCHEMATIC DIAGRAM 28...

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