Yamaha R-V702 R-V502 User Manual download pdf (Page 38)

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Flow Chart of Troubleshooting

7-14

7-10. DCS transmitter

CONTINUOUS TX ON CONDITION

CH : 698CH(DCS),660CH(PCS)

TX POWER CODE: 350 CODE APPLIED

RBW : 100KHz

VBW : 100KHz

SPAN : 10MHz

REF LEV. : 10dBm

ATT. : 20dB

U101

change or

resolder

F101 pin#5 :

about 2~3

dBm?

CN100, C105

check&change

F101

pin#10 : 3 V?

U300

check & change

L101:

≒ 4~5dBm?

U101

check & change

C103 : 3.7 V?

YES

BATTERY, U102

check & change

Between

R102 & U102

: 1.2V?

YES

R102

check &

change

R101:

≒ -5dBm ?

YES

U300

check

U102

change or

resolder

1 2 ... 33 34 35 36 37 38 39 40 41 42 43 44

GSM TELEPHONE 1
Printed in Korea 2
Code No.: GH68-07440A 2
1. Specification 3
Specification 4
2. Circuit Description 5
2-1-2. TX PART 6
2-2-1. CSP2200B1 6
2-2-2. Connector 7
2-2-3. IF connetor 8
2-2-4. Audio 8
2-2-5. Memory 9
2-2-6. Trident 9
2-2-7. CSP2200 10
3-1. Exploded View 11
3-2. Parts List 12
Description SEC CODE 13
3-3. Test Jig (GH80-00865A) 14
4. Electrical Parts List 15
Electrical Parts List 16
4302-001130 U303 BATTERY 19
NEW-IC001 F101 COMP-SMD 19
3722-002067 CN401 JACK-PHONE 19
5. Block Diagrams 21
Block Diagrams 22
6. PCB Diagrams 23
6-2. Main PCB Bottom Diagram 24
7-1. Power On 25
Flow Chart of Troubleshooting 26
7-2. Initial 27
7-3. SIM Part 29
7-4. Charging Part 30
7-5. Microphone Part 32
7-6. Speaker Part 33
7-7. EGSM Reciever 35
7-8. EGSM transmitter 36
7-9. DCS Receiver 37
7-10. DCS transmitter 38
7-11. PCS Receiver 39
7-12. PCS transmitter 40

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Yamaha R-V702 R-V502 User Manual Page 38

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