— 14 —
3-3. BL drive voltage adjustment
Checking
Make sure that CP900 (BL-VCC) is 5.4
±
0.2V.
3-4. VCOM AC and VCOM DC coarse adjustment
Adjustment
(1) Check if VCOM output (CP716) amplitude is 6.6
±
0.3V.
(2) Adjust VR320 so that High level of VCOM output (CP716) becomes 4.8
±
0.2V.
Power
Supply
L-PCB
VCOM
(PC716)
High level
amplitude
6.6 [V]
Oscilloscope
4.8 [V]
0 [V]
–1.8 [V]
Summary of Contents for QV-5500SX
Page 1: ...Ver 1 Dec 1999 R QV 5500SX MAR 1999 without price KX 712 INDEX...
Page 25: ...23 49 Take the spacer out Spacer 50 Remove LCD...
Page 34: ...32 BL PCB PCB 712BL C PCB PCB 712C PRINTED CIRCUIT BOARDS...
Page 35: ...33 D PCB PCB 712D...
Page 36: ...34 JK PCB PCB 712JK K PCB PCB 712K...
Page 37: ...35 L PCB PCB 712L...
Page 38: ...36 PW PCB PCB K777PW...
Page 39: ...37 SCHEMATIC DIAGRAMS DIGITAL CIRCUIT...
Page 40: ...38 POWER CIRCUIT DIGITAL ANALOG...
Page 41: ...39 LINEAR CIRCUIT...
Page 42: ...40 C PCB CIRCUIT...
Page 43: ...41 K PCB CIRCUIT...
Page 44: ...42 BL PCB CIRCUIT...
Page 45: ...43 JK PCB CIRCUIT to Battery Box Battery GND JK IN to PCB PW Imput DC 6V...
