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6-16

•

[UP]

 on the main unit and the remote commander

• SHUTTLE on the remote commander during Grid Test display

(This model does not provide JOG/SHUTTLE, and therefore
use another DVD remote commander having the JOG/
SHUTTLE)

The Self Check mode transits to this mode when 

[UP]

 key is en-

tered. The first grid of FLD all turns on and other grids turn off.
Each time the SHUTTLE is entered, the grid is switched in order.
When SHUTTLE input is clockwise, the grid switches in 1 

→ 2

→ 3 direction, or counterclockwise it switches in 3 → 2 → 1 direc-
tion. This tests whether each grid turns on individually.

Display at the start of Grid Test

↓      (Input in CW direction)

• [DOWN] on the main unit and the remote commander
• SHUTTLE on the remote commander during LED Test display

(This model does not provide JOG/SHUTTLE, and therefore
use another DVD remote commander having the JOG/
SHUTTLE)

LED is switched in order by the input of JOG/SHUTTLE. Also,
LED ON/OFF is switched by the input of same key as the function
that turns on the LED concerned.

FLD display during LED Test

• Input of a key on main unit

In the Self Check mode, each time a key on the main unit is en-
tered, a beep sound of 1kHz (100ms) is generated.

6-17

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ANODE CONNECTION

GRID ASSIGNMENT

(12G-1G)

13G

12G 11G 10G 9G

8G

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3G

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1G

col

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P1
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P9

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P15
P16
P17
P18

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3G

2G

1G

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6-18

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. In this case, disconnect the
MB-103 board and AV-63 board, and with the SELF CHECK (pin
0

) of IF CON (IC404) on the IF-92 board kept in low state, sup-

ply AC, and the IF CON self-diagnosis mode will be forcibly acti-
vated. The IF CON (IC404) checks the SELF CHECK port only
after the power on reset (only at AC supply, not in standby state).
If any button is pressed, its name is displayed on the fluorescent
display tube. But, if other than “NOTHING” is displayed though
no button is pressed, it means that any button has been pressed.

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 (CN102).
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 (CL101) 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.

R110 and R113 have defective soldering, X101 crystal os-
cillator is defective.

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

t

Observe XFRRST (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.

1-3-1. When the 8.25 MHz signal appears at CPUCK
•

 Check the XRD, XWRH and CS0X signal.

Observe XRD (pin-u;), XWRH (pin-ua), and CS0X (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 XFRRST (pin-uh) of SYSCON (IC104) normal or
not.
The signal starts up at the same time as Vcc 

t Defective

soldering.

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

6-19

•

 WAIT signal check

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

t Observe CS2X to CS5X (pins-

y;

 to yd).

If CS2X or CS3X is “L”. 

t AVD (IC403) has defective sol-

dering or AVD is defective.
If CS4x or CS5X 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 or CSnX 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.

•

 CSnX signal check

Observe CS0X to CS5X (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 short-
circuited with the other signal lines or SYSCON (IC104) is
defective.

CS0X:  ROM (IC106)
CS2X, CS3X: AVD (IC403)
CS4X, CS5X: 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 INT

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 INT0 to 2 (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.

INT0: AVD (IC403)
INT1, INT2: ARP & SERVO (IC301)

The CS signal other than CS0X is being output. 

t IC mount

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

CS2X, CS3X: AVD (IC403)
CS4X, CS5X: 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
XSDSPIT and XSDSPCS or ARP & SERVO (IC301) is
defective.

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

Check connection of 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 (IC601) mount is defective or power supply is defec-
tive or AVD (IC403) or audio DAC (IC601) 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-tg, tj, tl, ya, yd and yg of AVD (IC403) 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 AVD (IC403) is defective.

The ARP & SERVO (IC301) analog circuit of MB-103 board is
defective or RF-Amp (IC201) or M-Driver (IC202) peripheral cir-
cuit is defective or optical pickup block is defective or flat cable
connection is defective