ViewSonic P90F Service Manual download pdf (Page 6)

1.8

Voltage Breakdown Test

Connent the live and neutral connections together. Switch the monitor on/off switch to on Apply

1500VAC RMS or 2250VDC, 50Hz for one minute between live and neutral shorted together and

earth. Ensure no voltage breakdown occurs.

1.9

Earth Resistance/Continuity Test

Measure the resistance between the signal cable metal shell and the earth pin in the A.C. socket.

At a current of 25 amperes the resistance should be less than 100m.

NOTE:A portable appliance tester (PAT) is a suitable instrument to use for the above safety tests.

1.10

H.V. Over Voltage Portection (Required for X-Radiation Safety)

Adjust R176 slowly anti-clockwise until the over voltage protection circuit is activated, and the high

voltage must be less than 33KV at this moment. After test, R176 should be adjusted back to

normal(=26.2KV)

CAPACITOR:

C850 400V 4700PFM CAPACITOR.CERAMIC 5230105501

C851 400V 4700PFM CAPACITOR.CERAMIC 5230105501

C135 250V 33UFM CAPACITOR.ELECTROLYTIC 5214433012

C139 100V 330UFM CAPACITOR.ELECTROLYTIC 5214019612

RESISTOR

R827 1K RESISTOR.VS 5162161020

SEMICONDUCTORS

I101, I803 UC3842N IC LINEAR 6644063111

I301 (RA) TDA9116 SDIP32 IC.LINEAR A.S.D.C. 6644076308

I301 (RB) TDA9113 SDTP-32 IC.LINEAR A.S.D.C. 6644076305

I310 TDA8172 7P IC.LINEAR 6644076000

IA01 NT68F62U IC.LSI MCU FLASH MTP 6647008204

Q801 2SK2648-01 TR FET MOS 6626003208

Q433 2SC5587AS TR NPN HF 6621040405

Q121 2SK2843 TR FET MOS 6626003203

D807 RD20EB2-T1 TR PNP HF. 6615011831

D827 HZ5C1 DIODE ZENER 6615007834

OTHERS

SR801 OSA-SS-212DM5 RELAY 5054613402

F801 250V/3.15A FUSE 5054431539

T801 TPW-697 POWER TRANSFORMER 5061369700

T101 TFB-280L TRAQNS.FLYBACK COLOR 5062628032

V901 (CA) M46QDG423X04 CCRT/DY 5051286325

ViewSonic Corporation

Confidential – Do Not Copy

P90f-1

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ViewSonic P90F Service Manual Page 6