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VK Quality Group GSM C/S
☞
☞
TX Power Trouble (E
TX Power Trouble (E
-
-
GSM)
GSM)
Check
ANT Switch U604 pin 16
Frequency & Power.
Frequency = 902.4MHz
Power = 26~32dBm
Check
Power Amp U602 pin 8
Frequency & Power.
Frequency = 902.4 MHz
Power = 26~32dBm
Check :
• U602 soldering
• U602 pin 4 VBATT DC voltage (>3.3V)
• U602 pin 3 TX_EN
≥
1.8V (High)
• U602 pin 2 VC1
≤
0.5V (Low)
• U602 pin 6 TX Power > 0.2V
Replace U602 if defective.
Check :
• U604 soldering
• U604 pin 12 VC1
≥
2.8V (High)
• U604 pin 13 VC2
≤
0.4 (Low)
Replace U604 if defective.
YES
YES
YES
NO
NO
Check :
• RF connector J601 soldering.
• Matching network L610, C618 soldering.
END
A
Содержание VK2010
Страница 1: ...VK Quality Group GSM C S GSM GSM SERVICE MANUAL SERVICE MANUAL VK2010 VK2010 ...
Страница 12: ...VK Quality Group GSM C S Appearance Appearance ...
Страница 13: ...VK Quality Group GSM C S Icons Icons ...
Страница 14: ...VK Quality Group GSM C S Icons Icons ...
Страница 15: ...VK Quality Group GSM C S LCD Panel LCD Panel ...
Страница 17: ...VK Quality Group GSM C S 1 Assembly Drawings 1 Assembly Drawings 1 Exploded View Parts List ...
Страница 21: ...VK Quality Group GSM C S Rear Case Rear Case Disassembling Disassembling ...
Страница 23: ...VK Quality Group GSM C S Main PCB Main PCB Disassembling Disassembling ...
Страница 25: ...VK Quality Group GSM C S LCD Module LCD Module Disassembling Disassembling ...
Страница 29: ...VK Quality Group GSM C S RF Block Diagram RF Block Diagram ...
Страница 30: ...VK Quality Group GSM C S BASEBAND Block Diagram BASEBAND Block Diagram ...
Страница 32: ...VK Quality Group GSM C S Overall Structure Overall Structure ...
Страница 33: ...VK Quality Group GSM C S Base Band Block Base Band Block ...
Страница 34: ...VK Quality Group GSM C S MCP Main MCP Main ...
Страница 35: ...VK Quality Group GSM C S Nand Nand Block Block ...
Страница 36: ...VK Quality Group GSM C S Peripheral key Block Peripheral key Block ...
Страница 37: ...VK Quality Group GSM C S Power Management Black Power Management Black ...
Страница 38: ...VK Quality Group GSM C S RF Block RF Block ...
Страница 39: ...VK Quality Group GSM C S Audio Video Block Audio Video Block ...
Страница 40: ...VK Quality Group GSM C S Bluetooth Block Bluetooth Block ...
Страница 41: ...VK Quality Group GSM C S Battery Charger Block Battery Charger Block ...
Страница 43: ...VK Quality Group GSM C S Main PCB Main PCB Top Top Bottom Bottom ...
Страница 44: ...VK Quality Group GSM C S Module Area Module Area ...
Страница 45: ...VK Quality Group GSM C S RF Area RF Area ...
Страница 46: ...VK Quality Group GSM C S BASEBAND Area BASEBAND Area ...
Страница 48: ...VK Quality Group GSM C S Power Power On Trouble On Trouble ...
Страница 53: ...VK Quality Group GSM C S SIM Detection Trouble SIM Detection Trouble ...
Страница 58: ...VK Quality Group GSM C S RX Sensitivity Trouble RX Sensitivity Trouble E E GSM GSM ...
Страница 59: ...VK Quality Group GSM C S RX Sensitivity Trouble E RX Sensitivity Trouble E GSM GSM ...
Страница 61: ...VK Quality Group GSM C S Main Parts List Main Parts List ...
Страница 62: ...VK Quality Group GSM C S Main Parts List Main Parts List ...
Страница 63: ...VK Quality Group GSM C S ...
Страница 64: ...VK Quality Group GSM C S Main Parts List Main Parts List ...
Страница 65: ...VK Quality Group GSM C S Main Parts List Main Parts List ...
Страница 66: ...VK Quality Group GSM C S THANK YOU ...