Sharp LC-20AV7U Service Manual - Page 47

Main CBA Bottom

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Main CBA Bottom View CAUTION ! Fixed voltage (or Auto voltage selectable) power supply circuit is used in this unit. If Main Fuse (F601) is blown , check to see that all components in the power supply circuit are not defective before you connect the AC plug to the AC power supply. Otherwise it may cause some components in the power supply circuit to fail. WF4 PIN 75 OF IC1202 WF2 PIN 76 OF IC1202 NOTE: CBA AND PWB MEANS PRINTED WIRING BOARD. 4A/125V CAUTION ! : For continued protection against risk of fire, replace only with same type 4 A, 125V fuse. ATTENTION : Utiliser un fusible de rechange de même type de 4A, 125V. NOTE: The voltage for parts in hot circuit is measured using hot GND as a common terminal. Because a hot chassis ground is present in the power supply circuit, an isolation transformer must be used. Also, in order to have the ability to increase the input slowly,when troubleshooting this type power supply circuit, a variable isolation transformer is required. WF5 PIN 56 OF IC1202 WF3 PIN 57 OF IC1202 WF6 PIN 66 OF IC1202 WF1 PIN 71 OF IC1202 WF7 PIN 14 OF IC801 9-13 BA7140F01013-1

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9-13
NOTE: CBA AND PWB MEANS PRINTED WIRING BOARD.
PIN 76 OF
IC1202
WF2
PIN 75 OF
IC1202
WF4
PIN 71 OF
IC1202
WF1
PIN 66 OF
IC1202
WF6
PIN 57 OF
IC1202
WF3
PIN 56 OF
IC1202
WF5
PIN 14 OF
IC801
WF7
Main CBA Bottom
View
BA7140F01013-1
For continued protection against risk of fire,
replace only with same type
4 A, 125V fuse.
CAUTION ! :
ATTENTION :
Utiliser un fusible de rechange de m
ê
me type de
4A, 125V.
4A/125V
CAUTION !
Fixed voltage (or Auto voltage selectable) power supply circuit is used in this unit.
If Main Fuse (F601) is blown , check to see that all components in the power supply
circuit are not defective before you connect the AC plug to the AC power supply.
Otherwise it may cause some components in the power supply circuit to fail.
Because a hot chassis ground is present in the power
supply circuit, an isolation transformer must be used.
Also, in order to have the ability to increase the input
slowly,when troubleshooting this type power supply
circuit, a variable isolation transformer is required.
NOTE:
The voltage for parts in hot circuit is measured using
hot GND as a common terminal.