L-Pcb Assy; Vcc3, Vcc3-1, Vcc5, Vcc5-1 Voltage Check; Vcc15, Vee7 Voltage Check; Vcc2 Adjustment And Vcc13, Vcc7, Vee2 Voltage Check - Casio QV-8000SX Service Manual & Parts List

5. L-PCB Assy

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

1. Preparation
• AC adaptor or voltage regulator
• Multimeter
2. Adjustment procedure
Make sure
(CP112) = 3.3 ± 0.1 [V]
VCC3
VCC3-1 (CP116) = 3.3 ± 0.1 [V]
(CP121) = 5.0 ± 0.15 [V]
VCC5
VCC5-1 (CP131) = 5.0 ± 0.15 [V]
3. Notes
When not able to adjust using AC adaptor, use voltage regulator and supply power to be VCC1-1
(CP105)=5.0 ± 0.05 V.

5-2. VCC15, VEE7 Voltage check

1. Preparation
• AC adaptor or voltage regulator
• Multimeter
2. Adjustment procedure
Make sure
(CP126) = 15.0 ± 0.45 [V]
VCC15
(CP125) = –7.5 ± 0.5 [V]
VEE7
3. Notes
When unable to adjust using AC adaptor, use voltage regulator and supply power to be VCC-1-1
(CP105) = 5.0 ± 0.05 V.

5-3. VCC2 adjustment and VCC13, VCC7, VEE2 Voltage check

1. Preparation
• AC adaptor or voltage regulator
• Multimeter
2. Adjustment procedure
Adjust VR951 so that VCC2 (CP972) = 5.0 ± 0.02 V.
Make sure
VCC7 (CP971) = 6.8 ~ 8.6 [V]
VCC13 (CP970) = 11.4 ~ 14.1 [V]
VEE2 (CP973) = –11.0 ~ –16.5 [V]
3. Notes
When unable to adjust using AC adaptor, use voltage regulator and supply power to be VCC-1-1
(CP105) = 5.0 ± 0.05 V.
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