Sony CPD-100ES Service Manual - Page 9

SECTION 3 SAFETY RELATED ADJUSTMENT CPD-100ES When replacing parts shown in the table below, the following operational checks must be performed as a safety precaution against X-rays emissions from the unit. D - BOARD Part Replaced ([) RV501 Part Replaced (]) IC801, IC901, IC904, FBT (T501) D511, D515, D596, R532, R533, R534, R535, R538, R539, R540, R541, R542, R543, R544, R545, R807, R822, R823, R824, R939, R996, RV501, C509, C515, C516, C517, C519, C528, C542, C548, C549, C802, C814, C815, C904, C910 Allow the unit to warm up for one minute prior to checking the following conditions. b) HV Hold-Down Check 1) Using an external DC Power supply, apply the voltage shown below between cathode of D511 on "D" Board and GND, and confirm that the HV Hold-Down circuit works. (Raster disappears) Standard voltage: 35.20 + 0.05 VDC Check Condition • Input voltage : 120 + 2 VAC • Input signal : Any pattern (fH = 64 kHz) • Controls : CONT and BRT 2 Minimum : Screen VR (G2)2 Cutoff c) Beam Protector Check (Software logic) 1) Using an external DC power supply, apply the voltage 7.00 + 0.05 VDC between pin 11 of FBT (T501) and GND, and confirm that the voltage of both ends C519 is with in the voltage range shown below. Standard voltage: Less than 3.26 VDC a) HV Regulator Check 1) Input white cross hatch signal. (fH = 64 kHz) 2) Minimum CONT and BRT controls. 3) Cut off Screen VR (G2). 4) Input voltage: 120 + 2 VAC 5) Confirm that the voltage is within the voltage range shown below. Standard voltage: 25.0KV + 0.5KV 6) When replacing components identified by ], make sure to recheck the High Voltage. 7) Verify the High Voltage as shown above (25.0KV + 0.5KV) is within specification. If not, set H. SIZE data at minimum (-127) and then adjust RV501 on "D" Board. 8) After adjusting the High Voltage within specification, put the RV cover on RV501 as shown below and apply sufficient amount of RTV around RV501. Check Condition • Input voltage : 120 + 2 VAC • Input signal : Any pattern (fH = 64 kHz) • Controls : CONT and BRT 2 Minimum : Screen VR (G2) 2 Cutoff d) +B MAX. Check 1) Input white cross hatch (fH = 64 kHz) signal. 2) Minimum CONT and BRT controls. 3) Input voltage: 120 + 2 VAC Note: Use NF power supply or make sure that distortion factor is 3% or less. 4) Confirm that the voltage is within the voltage range shown below. Standard voltage: 143 + 2 VDC 104 RV501 - 9 -