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– 29 –

When the CD section does not operate When the objective lens of the optical pickup is dirty,this section may not operate.Clean
the objective lens,and check the playback operation.When this section does not operate even after the above step is taken,check
the following items.
Remove the cabinet and follow the troubleshooting instructions.
"Track skipping and/or no TOC(Table Of Contents) may be caused by build up of dust other foreign matter on the laser pickup lens.
Before attempting any adjustment make certain that the lens is clean. If not, clean it as mentioned below."

Turn the power off.
Gently clean the lens with a lens cleaning tissue and a small amount of isopropyl alcohol.
Do not touch the lens with the bare hand.

Make sure that the disc is normal, and then set the FUNCTION switch to CD. Check the voltage on pins 14 of CNS 602.

Is the measured voltage as specified in circuit diagram?

Check the main unit power supply circuit.

No

Yes

Check the procedure in "LCD DISPLAY ERROR".

No

Does the LCD work?

Yes

Check the procedure in "LASER FAILURE".

No

Does the laser come on in CD test mode "STEP 2"?

Yes

Check the procedure in "SPINDLE MOTOR CLV SERVO
FAILURE"

No

Does the spindle motor rotate normally when the CD test mode
changes from "STEP 3" to "STEP 4"?

Yes

Check the procedure in "HF ERROR"

No

Is the (HF) output on pin 1 of IC 801 flat in CD test mode "S5"?

Yes

Does the sled motor move?

No

Is a sound heard when the optical pickup moves to the selected
place in the FF/REW mode after the servo test mode "STEP 5"
has been selected?

No

Check the procedure in
"SLED MOTOR

OPERATION FAILURE".

Check the procedure in "NO SOUND".

Yes

Yes

Does LCD track number indicator work properly?

Check the pattern between pins 46, 47, 59, 60, 61 and 62 of

IC 701 and the pins 14, 15, 16, 17, 18 and 19 of IC 802.

Yes

Turn the power off and then back on. Does the unit initialize
properly and start playback when the PLAY key is pressed?

Is "Er" displayed?

Check the pattern between pin 57 (PUIN) of IC 701 and
CNW 803.

Yes

Yes

Arc the 1st and 2nd selections played in order in the FF mode?

Check the procedure in "TACK SERACH FAILURE".

Yes

Does playback continue for 30 seconds after the start of playback?

Check the procedure in "SLIDE SERVO OPERATION FAILURE".

Yes

Normal

Yes

Check the procedure in "FOCUS FAILURE".

No

Does the CD test mode advance from "STEP3" to "STEP4".

No

No

No

No

– 30 –

Is +5V applied to the pin 8 (VDD) of IC701?

Is +5V applied to the pin 38 (SYS STOP) of IC701?

Check the peripheral parts of IC701 and LCD701.

Yes

Yes

No

No

Is +5.6V applied to the
emitter of Q704?

Is +2.5V applied to the pin 42 of IC802?

Yes

No

Check the pattern between
Q704 and CNS603.

Check the pattern between Q704 and IC704.

Yes

Check the PWB pattern between the collector of Q702 and Q701.

No

Does the laser come on when pattern cut between pin 21 of IC801
and pin 42 of IC802.

Check the PWB pattern between IC701 and IC802 (BUCK/CCE/
BUS0~3)

Yes

Yes

No

Check the peripheral parts of IC801 and Q801. If it is normal, the
optical pickup is faulty.

No

Check CNW802. If it is normal, the optical pickup is faulty.

Is approx. 2V applied to the collector of Q801.

Does the optical pickup move up and down when the disc is
removed?

Is the following waveform ouput at the pin 11 (FEI) of IC801
when the disc is set?

Is the waveform shown above input at the pin 50 (SBAD) of
IC802?

Yes

Yes

No

No

The optical pickup is faulty.

The periphery of IC801 or
CNW802 is faulty.

Check as stated in item "FOCUS SERVO SAWTOOTH WAVE
FAILURE".

Yes

Check the periphery of IC801 and CNW802. is it normal?

Yes

No

Check the pattern between pin 6 of IC801 and pin 50 of IC802.

IC801 is faulty.

Yes

Pin11

(FEI)

Pin16

(FSO)

Pin6

(SBAD)

– 31 –

Is sawtooth wave obtained at the pin 33 of IC804 (as shown
above)?

Is sawtooth wave obtained between pins 30 and 31 of IC804
(as shown above)?

Is +5V applied to the pin 20 (VCC) of IC801?

Check the pattern between pin 20 of IC801 and Q861.

No

Yes

Yes

Yes

Is sawtooth wave output to the pin 16 (FSO) of IC801?

No

No

Check R823 and R833 of
pins 43 and 44 of IC802.
If OK, IC801 is faulty.

Is the following waveform
shown below obtained?

Check the periphery of pin 17 (COSC) of IC801.
If OK, IC801 is faulty.

Yes 

(the sawtooth wave

fluctuates once to a side).

1~2sec

Check pattern between pin 58 (CD STB) of IC701 and pin 36 of
IC804. If OK, signal line connection failure between pin 16 (FSO)
of IC801 and pin 33 of IC804.

No

Check the peripheral parts of IC804 and power line.
If OK, IC804 is faulty.

No

Is sawtooth wave obtained between pins 3 and 4 of CNW801
(as shown above)?

Yes

Check the pattern between IC804 and CNW801.

No

CNW801 connection failure or optical pickup failure.

Yes

Does the eye pattern appear at the pin 1 (RFO) of IC 801?
(Although the waveform is not clear.)

Does the spindle motor rotate?

No

Yes 

(excessively high speed rotation)

Yes

Is the waveform shown above at the pin
24 of IC801.

No

No

IC802 is faulty.

Check whether the pins 39 and
40 of IC802 is set to HIGH for
approx. 0.3 to 1.5 sec and then
pulse is obtained when the CD
test mode STEP3 is changed
to "STEP4"?

Check the periphery IC801. If OK, IC801 is faulty.

Yes

Check again that the objective lens of optical pickup is not
contaminated. If it is contaminated, clean. Check the periphery of
IC801 and CNW802. If OK, the optical pickup is faulty.

No

Is eye pattern Vp-p1.4V output at the pin 53 (RFI) of IC802?

Yes

Check the PWB pattern and C841.

No

Check the periphery pins 55~64 to IC802. If OK, IC802 is
faulty.

Yes

Is voltage oobtained for spprox
0.3 to 1.5 sec between the pins
24 and 25 of IC804 when the
CD test mode "STEP3" is
changed to "STEP4"

Yes

Spindle motor failure or
wire breakage.

No

0.3~1sec

0.3~1sec

VRO level

2V

Check the pattern between IC801 and
IC804.

Yes

– 32 –

Yes

Yes

Is output (tracking error signal) obtained at the pin 35 (TSO) of
IC801 when the CD test mode "STEP4" is set?

Is tracking output obtained at the pin 30 (TS20) of IC801 when
the CD test mode "STEP5" is set?

Is output obtained between the pins 6 and 7 of IC804?

No

Check the peripheral parts of IC801. If OK, IC801 is faulty.

No

No sound from both L and R-ch?

Yes

Is power supply voltage of IC802 normal?

No

Does the sled motor run in FF/REW state when the servo
test mode "STEP1" is set?

Is the following waveform output at the pin 35 (TSO) of IC801
during track search in normal playback?

Is the following waveform output at the pin 5 (RFRP) of IC801
during track jump?

Yes

Yes

No

Check IC801 and the periphery of CNW802. If OK, the optical
pickup is faulty.

VRO

Check the peripheral parts of IC804. If OK, IC804 is faulty,

No

Yes

Check the connection between IC804 and CNW801.
If OK, the optical pickup is faulty.

Check the interval between the pins 11 and 12 CNS602 as well as
between the pins 2 and 6 of IC602.

No

Check power supply line.

Yes

Is signal of pins 2 and 6 of IC802 output?

No

Check the peripheral parts of IC802. If OK, IC802 is faulty.

Yes

The main PWB is faulty.

Check as stated in item "SLED MOTOR OPERATION FAILURE".

No

Check the pattern between pins 34, 35 of IC801 and pins 48,49 of
IC802.

TSO

No

Check the C828. If OK, IC801 is faulty.

* The state where the waveform shown left is output at the pin 33 (TKIC) of

IC802 is referred to as track jump state.

or

Kick Pulse

Pin5
(RFRP)

Pin35
(TSO)

Yes

Is the following waveform output at the pin 30  (TS20) and pin
35 (TSO) of IC801 during track jump?

No

Check pattern between pin 33 of IC802 and pin 31 of IC801.
If OK, IC801 is faulty.

Check the pariphery of pin 30 (TS20) and pin 26 (FUSO) of
IC801.

Yes

Pin35
(TSO)

Pin30
(TS20)