Pw-Pcb Assy; Vcc3, Vcc3-M, Vcc5, Vcc7 Voltage Check; Vcc15, Vee7 Voltage Check; Bl Drive Voltage Adjustment - Casio QV-3000EX Service Manual & Parts List

5. PW-PCB Assy

5-1. VCC3, VCC3-M, VCC5, VCC7 Voltage check

1. Preparation
• AC adaptor or voltage regulator
• Multimeter
2. Adjustment procedure
• Make sure
(CP110) = 3.3 ± 0.1 [V]
VCC3
(CP111) = 3.4 ± 0.2 [V]
VCC3-M
(CP115) = 5.0 ± 0.15 [V]
VCC5
VCC7 (CP950) = 8.0
3. Note
When unable to adjust using AC adaptor, use voltage regulator and supply power to be VCC1-1, 2, 3 =
5.0 ± 0.05 V.

5-2. VCC15, VEE7 Voltage check

1. Preparation
• AC adaptor or voltage regulator
• Multimeter
2. Adjustment procedure
Adjust VR100 so that VCC15 (CP118) = 15.0 ± 0.1 [V] and make sure that VEE7 (CP117) = -7.5 ± 0.2 [V].
3. Notes
When unable to adjust using AC adaptor, use voltage regulator and supply power to be VCC1-1 (CP107) =
5.0 ± 0.05 V.

5-3. BL drive voltage adjustment

1. Preparation
• AC adaptor or voltage regulator
• Multimeter
2. Adjustment procedure
Make sure that BL-VCC (CP910) is within 5.0 ± 0.05V.
3. Notes
When unable to adjust using AC adaptor, use voltage regulator and supply power to be VCC-1-1 (CP107) =
5.0 ± 0.05 V.
+ 0.6
[V]
– 0.7
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