Sharp PN-U423 (serv.man2) Service Manual ▷ View online
PN-U523/U473/U423 DISASSEMBLY AND ASSEMBLY 6 - 1
CHAPTER 6. DISSAEMBLY AND ASSEMBLY
n
Do not touch the PWBs which employ lead-free solder with bare hands. Always use gloves.
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Use the earth band when performing the procedures.
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When servicing the Display such as replacing a PWB, make sure to service with the Display laid and with a protective sheet spread over
the LCD panel.
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While working with the Display laid, or when moving the Display after the work, applying stress to the bezel may cause it to get deformed.
Be sure to handle it with great care.
*If the work procedure is the same, may differ from the real thing to describe together illustration of three models. (Use PN-U553 mainly)
1.
PWB AND WIRING DIAGRAM
■PN-U553
A
B
C
No.
Parts name
A
Main PWB
B
Power unit
C
Key PWB
PN-U523/U473/U423 DISASSEMBLY AND ASSEMBLY 6 - 2
■PN-U473
B
A
C
D
No.
Parts name
A
Main PWB
B
Power unit
C
Key PWB
D
Relay PWB
PN-U523/U473/U423 DISASSEMBLY AND ASSEMBLY 6 - 3
■PN-U423
B
A
C
No.
Parts name
A
Main PWB
B
Power unit
C
Key PWB
PN-U523/U473/U423 DISASSEMBLY AND ASSEMBLY 6 - 4
2.REAR COVER
1)Remove the screws, and remove the stand angle.
PN-U553
2)Remove the screws, and remove the rear cover.
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