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This section describes procedures and instructions necessary for
adjusting electrical circuits in this set.

Instruments required:
1) Color monitor TV
2) Oscilloscope 1 or 2 phenomena, band width over 100 MHz,

with delay mode

3) Frequency counter (over 8 digits)
4) Digital voltmeter
5) Standard commander (RMT-D183)
6) DVD reference disc

HLX-501 (J-6090-071-A) (dual layer) (NTSC)
HLX-503 (J-6090-069-A) (single layer) (NTSC)
HLX-504 (J-6090-088-A) (single layer) (NTSC)
HLX-505 (J-6090-089-A) (dual layer) (NTSC)
HLX-506 (J-6090-077-A) (single layer) (PAL)
HLX-507 (J-6090-078-A) (dual layer) (PAL)

1. Checking Video Output Level
<Purpose>
This checks whether Video Output level satisfy the NTSC stan-
dard. If it is not correct, the brightness will be too large or small.

Mode

Play

Signal

Check the Color-bar (100%) signal
on DVD reference disc

Measurement Point

LINE OUT (VIDEO) connector
(75 

Ω terminated)

Measuring Instrument

Oscilloscope

Specification

1.00 

± 0.05 Vp-p

Checking method:
1) Confirm that the Video Output level is 1.00 

± 0.05 Vp-p.

1.00 

± 0.05 Vp-p

MEMO

No power on

by adaptor

No power on

by battery

Is adaptor

out 9.5V?

YES

NO

Is P1 OK?

Replace P1

Is D22 OK?

NO. P_3V3

NO. +3.3V

NO. +5V

NO. +1.8V

Is Q46 OK?

Replace Q46

Is U20 OK?

Replace U20

Is U17 OK?

Is U17 OK?

Is –AVCC

OK?

Replace U17

NO. 
LCD power

Replace U10

Replace U17

Is U19 OK?

Replace U19

Replace U21

Is U21 OK?

Replace D22

Replace adaptor

Is battery OK?

Replace Q43

Is Q43 OK?

Replace battery

AUDIO OUT ABNORMAL

SPEAKER ABNORMAL

Is SW15, SW16 OK?

Replace SW15, SW16

Replace U11

Replace U3

Replace speaker

Is U11 OK?

Is speaker OK?

Check audio jack & mode

Check U15

Check U14

Check U13

Check signals from

U3 (MT1389)

YES

YES

YES

YES

NO

NO

NO

NO

NO

NO

NO

NO

NO

NO

NO

NO

NO

NO

NO

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

Is –USB VCC

OK?

Replace U18

NO

VIDEO OUT ABNORMAL

OPEN/CLOSE ABNORMAL

NO CHARGING

Is 9.5V OK?

Check P1

Is Q46, U21 OK?

Replace Q46, U21

Is U2 OK?

Replace U2

Is Q44 OK?

Replace Q44

Is J9 OK?

Replace J9

Check SW17 & SW18

Check the connection of part

Check traverse

PICTURE ABNORMAL

DISC ERROR

Check video jack & mode

Check the disc

Check disc

Check the traverse

Check traverse

Check the SDRAM

Refer to servo part

Refer to servo part

Check LC filter

Check video signals from

U3 (MT1389)

YES

YES

YES

YES

NO

NO

NO

NO

NO

Refer to servo part