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ANODE CONNECTION

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CHAP INDEX

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PROGRESSIVE

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42

You cannot enter the Test mode when either button has been pressed
by any reason with the board assembled in the front panel. In this
state, the power does not turn on even under normal condition (the
unit is kept in standby state), and also no button is active and the
remote commander is not accepted. To check this state, you can
enter forcibly the IF CON self-diagnosis mode by turning on the
AC power with the SELF_CHECK (pin oj) of the IF CON (IC1003)
on the PANEL-L board kept “low”. The IF CON (IC1003) checks
the SELF CHECK port only after the power on reset (only at AC
supply, not in standby state).

Check that the ICs of SYSCON (IC104), ROM (IC106), AVD
(IC403), ARP & SERVO (IC301) are working correctly.
Check that outside appearance of the ICs is normal.
Check that IC pins are not short-circuited.
Check that there is no soldering error.
Check that outside appearance of the capacitors and resistors
is normal.

Check the power voltage of the power connector (CN101).
Check the power voltage of SYSCON (IC104).
Check the power voltage of ROM (IC106).
Check the power voltage of AVD (IC403).
Check the power voltage of ARP & SERVO (IC301).
If the power voltage has any abnormality 

t

Check that the power supply lines are not shorted.
Check that there is no soldering error.

If any abnormality cannot be found still 

t

Check that each IC is working normally.

Measure the clock signal frequency at CPUCK (CL102) of
SYSCON (IC104) with an oscilloscope.
If the 8.25 MHz signal appears. 

t Check the machine ac-

cording to section 1-3-1
If the 33 MHz signal appears. 

t Check the machine accord-

ing to section 1-3-2.
If other frequencies are output.

R106 and R107 have defective soldering, X101 crystal os-
cillator is defective.

If the measurement point is fixed to either “H” or “L”. 

t

Observe XRESET (pin-uh) of SYSCON (IC104) with an
oscilloscope.
If the measurement point is “L”, check the following items.

If the IC has defective soldering, if the IC is short-circuited.
If the measurement point is “H”,

t Component X101 or SYSCON (IC104) is defective.

•

Check the XRD, XWRH and CS0X signal.

Observe XRD (pin-u;), XWRH (pin-ua), and XROMCS (pin-
tk

) of SYSCON (IC104) with an oscilloscope.

If these pins are fixed to either “L” (0V) or “H” (3.3V), or if
these pins stay in the center voltage, check the followings.

Check if the signal line does not have the defective solder-
ing.
Check if the signal line is short-circuited with other signal
lines.
If you cannot find any problem 

t SYSCON (IC104) is

defective.

•

HA [0 to 21] signal and HD [0 to 15] signal check

Observe HA [0 to 21] (pins-<z/x  to <z/. , <zzz  to <zz, , <zx/ , 1 to 5) of
SYSCON (IC104) and HD [0 to 15] (pins-ig to <z// ) with an
oscilloscope.
If these pins are fixed to either “L” (0V) or “H” (3.3V), or if
the HA pin stays in the center voltage, check the followings.
(HD stays in the center voltage when it is normal.)

t  Check if the signal line does not have the defective
soldering, or is short-circuited with other signal line or
SYSCON (IC104) is defective.

•

Reset signal check

Check if XRESET (pin-uh) of SYSCON (IC104) normal or
not.
The signal starts up at the same time as Vcc 

t Defective sol-

dering.

If the trouble does not apply to any of the above-described phe-
nomenon, SYSCON (IC104) or ROM (IC106) is defective.

43

•

WAIT signal check

Observe XWAIT (pin-yj) of SYSCON (IC104) with an oscil-
loscope.
If it is fixed to “L” (0V). 

t  Observe XAVCS0, XAVCS1,

XARPCS and XSDSPCS (pins-y; to yd).
If XAVCS0 or XAVCS1 is “L”. 

t AVD (IC403) has defec-

tive soldering or AVD is defective.
If XARPCS or XSDSPCS is “L”. 

t ARP & SERVO (IC301)

has defective soldering or ARP & SERVO is defective.
If any one of the above is not “L”. 

t  XWAIT, XAVCS0,

XAVCS1, XARPCS and XSDSPCS is short-circuited or has
the defective soldering or AVD (IC403) is defective or ARP &
SERVO (IC301) is defective.
Center voltage 

t The XWAIT line has defective soldering or

is short-circuited or AVD (IC403) is defective or ARP &
SERVO (IC301) is defective or SYSCON (IC104) is defec-
tive.

•

XROMCS, XRAMCS, XAVCS0, XAVCS1, XARPCS and
XSDSPCS signal check

Observe XROMCS, XRAMCS, XAVCS0, XAVCS1,
XARPCS and XSDSPCS (pins-tk to yd) of SYSCON (IC104)
with an oscilloscope.
If they are fixed to “L” (0V) or if to center voltage 

t Check

that the ICs do not have the defective soldering or is
shortcircuited with the other signal lines or SYSCON (IC104)
is defective.

XROMCS: ROM (IC106)
XAVCS0, XAVCS1: AVD (IC403)
XARPCS, XSDSPCS: ARP & SERVO (IC301)

If the trouble symptom does not apply to any of the above phe-
nomenon, SYSCON (IC104) or ROM (IC106) is defective.

Observe SDCLKO (pin-<zxm ) of AVD (IC403) with an oscillo-
scope.
95 MHz 

t No problem

27 MHz 

t Observe the XRST, HA, HD, XRD, XWRH and

CS signal waveform at the respective pins of AVDEC, AVD
(IC403) is defective.
If the signal is other than the above frequencies 

t AVD

(IC403) 27MHz signal line (CLKI (pin-<zb, ), SCLKIN (pin-
<zn/

 )) is short-circuited, IC mount is defective, AVD (IC403) is

defective, PLL (IC103) is defective.

Observe XAVDECINT, XARPINT and XSDSPINT (pins-qh
to qk) of SYSCON (IC104) with an oscilloscope.
If they are fixed to “L” (0V) or fixed to the center voltage 

t

Check that the ICs do not have the defective soldering, or are
short-circuited, SYSCON (IC104) is defective, or the follow-
ing ICs are not defective.

XAVDECINT: AVD (IC403)
XARPINT, XSDSPINT: ARP & SERVO (IC301)

The CS signal other than XROMCS is being output. 

t IC

mount is defective or the IC is defective depending on the
moving CS signal.

XAVCS0, XAVCS1: AVD (IC403)
XARPCS, XSDSPCS: ARP & SERVO (IC301)

If the trouble is not applicable to any of the above phenomenon,
SYSCON (IC104) or ROM (IC106) is defective.

Check frequency of CLKIN (pin-<zb/ )
33 MHz 

t Normal

Frequency other than 33 MHz 

t CLKIN is short-circuited or

defective soldering or PLL (IC103) is defective or ARP &
SERVO (IC301) is defective

Observe PLCKO (pin-ij) of ARP & SERVO (IC301) with an
oscilloscope.
If the pin is fixed to either “L” (0V) or “H” (3.3V).

If XRST if fixed to “L”. XRST has the defective solder-
ing, In all other cases. ARP & SERVO (IC301) is defec-
tive

If it is oscillating.

HA [0 to 7] are HD [8 to 15] are short-circuited, check
XSDPIT and XSDPCS or ARP & SERVO (IC301) is de-
fective.

IC mount of the NG item is defective or IC is defective.

Check connection of CN501 and CN601
Check for the defective connection of flat cable and check of
damage of the flat cable.

Check the audio data output (at pins-wf, wk, and wl) of AVD
(IC403)

The audio data is not output. 

t AVD (IC403) or audio

DAC (IC502) mount is defective or power supply is defec-
tive or AVD (IC403) or audio DAC (IC502) is defective.

PLL (IC103) 512fs output check

If the frequency or waveform has abnormality. 

t The sig-

nal line has defective soldering or the signal line is short-
circuited with other signal lines or PLL (IC103) is defec-
tive.

Observe pins-ej,  ek,  el,  rs,  rd  and  rf  of VDAC (IC604)
with an oscilloscope.
If the analog signal is not output. 

t The signal line has the

defective soldering or is short-circuited or parts are defective
or VDAC (IC604) is defective.

The ARP & SERVO (IC301) analog circuit of MB board is defec-
tive or RF-Amp (IC201) or M-Driver (IC202) peripheral circuit is
defective or optical pickup block is defective or flat cable connec-
tion is defective

44

•

If MB does not have any problem,

The board other than MB board is defective or connection is
defective or optical pickup block is defective or mechanism
deck is defective

2

qd

qa

qs

If voltage is abnormal. 

t The power supply block is defec-

tive.

If the fuse has blown 

t Replace the fuse.

1

If it remains at “L”,
t The signal line has the defective soldering or it is short-
circuited with other signal lines or capacitor or resistor is de-
fective or IFCON is defective or connection between the power
supply block and the AV board is defective, or connector in-
stallation is defective, or the power supply block is defective.

If the button is kept depressed. 

t The front panel is defec-

tive, or PANEL-L board is defective.

og

If it is 0.5 V or more. 

t The power supply is defective, or

PANEL-L board is defective.

1

rj

If no voltage supply 

t DC/DC converter (T1081) defective,

or the PANEL-L board is defective.

If voltage is abnormal. 

t The power supply block is defec-

tive, or the PANEL-L board is defective, or MB board is de-
fective.

2

If it is fixed to “L”. 

t The signal line has defective soldering,

or is short-circuited with other signal lines, or parts are defec-
tive.

3

4

5

6

7

If they are fixed to “H” or “L”.
t The signal line has defective soldering, or is short-circuited
with other signal line, or parts are defective, or SYSCON
(IC104) is defective
If they change between “L/H”.
Connector installation is defective, or the PANEL-L board is
defective, or SYSCON (IC104) is defective.
If they stay in the center voltage.
Poor connection of flexible wiring board such as it is inserted
in an angle diagonally, or defective soldering, or is short-cir-
cuited with other signal line.

og

If rise-up time from 0.5 V to 1.5 V or more takes longer time,
or it does not exceed 1.5 V or more. 

t The PANEL-L board

is defective.

Connection between the power supply block and the AV board
is defective, or connection between the AV board and the MB
board is defective, or connector installation is defective, or AV
board is defective.

The MB board AVD (IC403) or SDRAM (IC404, IC405) is
defective, or ARP & SERVO (IC301) is defective.