Model name, Dell e173fp service manual – Dell E173FP User Manual

Page 17

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DELL E173FP Service Manual

17

5.3.2Power Block Diagram

R8
CCFL

Vrms

M5

METER V

Note 1: M3 / M4/M5/M6 need to use two channel multimeter , such as

FLUKE 45 , or use the oscilloscope check frequency.

CN901

N

L

GN

D

Vrms

M6

METER V

R12
CCFL

ON/OFF

1. M3 / M4/M5/M6 = 6.5 +- 5 mV @

DIM= 5V

2. Check M3 / M4/M5/M6operating frequency. (

note 1 )

CON207

1

2

GND

CN102

1

2

3

4

5

6

7

8

10

9

11

12

PWPC1742LGD1

GND

R11
10

 

12V

M3 / M4 /M5/M6= 3.0 +- 5 mV @

DIM= 0V

Vrms

M4

METER V

M1 = 12V +- 0.5V , M2 = 5V +- 0.25V

R6
CCFL

R10
CCFL

CON206

1

2

2. M3 / M4/M5/M6= 55KHz

+- 5 KHz

DIM

R7
10

 

V

M2

METER V

R2
5

 

R13
10

 

VR1
10K

 

R5
100

 

Specification :

AC IN

CON208

1

2

R4
560

 

Function test step :

Vrms

M3

METER V

5V

Step1 :

R1
100

 

PCB

NO.715L1283-1

Model name :

PWPC1742LGD1

Function test

V

M1

METER V

R9
10

 

CON205

1

2

1. Adjust VR1 ( Set Vdim voltage from 0V to 5V) , then check M3 /

M4/M5/M6 Vrms .

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