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Casio QV-3500EX Service Manual & Parts Catalogue

Casio QV-3500EX
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4. D-PCB Assy
4-1. VCO free run frequency adjustment
1. Adjustment procedure
Make sure
VCC5 (CP344) = 5.0 ± 0.05 [V]
VCC15 (CP391) = 15.0 ± 0.45 [V]
VCC7 (CP390) = 8.0 ± 0.05 [V]
VCC3 (CP220) = 3.3 ± 0.08 [V]
Room temperature should be 20 ± 10 °C
2. Preparation
AC adaptor or voltage regulator
Frequency counter
3. Adjustment and checking
(1) Connect SYF (CP355) and GND (CP350).
(2) Monitor HDB (CP704) with frequency counter and adjust VR320 so that frequency becomes 15.734
± 0.1 KHz.
(3) After completing adjustment, disconnect SYF (CP7033) and GND (CP700).
4-2. VCOM AC adjustment and VCOM DC coarse adjustment
1. Adjustment procedure
Make sure
VCC5 (CP344) = 5.0 ± 0.05 [V]
VCC15 (CP391) = 15.0 ± 0.45 [V]
VCC7 (CP390) = 8.0 ± 0.05 [V]
VCC3 (CP220) = 3.3 ± 0.08 [V]
2. Preparation
AC adaptor or voltage regulator
Frequency counter
3. Adjustment procedure
(1) Make sure amplitude of VCOM output (CP364) is 6.6 ± 0.3 V.
(2) Adjust VR321 so that maximum VCOM output (CP364) will be 4.8 ± 0.2 V.
4. Note
When unable to adjust using AC adaptor, use voltage regulator and supply power to be VCC1-1 (CP105)
= 5.0 ± 0.05 V.

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Casio QV-3500EX Specifications

General IconGeneral
BrandCasio
ModelQV-3500EX
CategoryDigital Camera
LanguageEnglish

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