NAD C541 User manual

NAD
SERVICE MANUAL
C 541
COMPACT
DISC PLAYER
C 541 COMPACT DISC PLAYER

2
CATUION
HGKJDHSGKJHGSJK
ADVARSEL
HGKJDHSGKJHGS
KBVNCLKNBCVLKNLKNVLKNCVNCLVK JK
ADVARSEL
HGKLFH;L;HJMNMD
HFKLJHJLDKLJLKDJLKFHJHSGMMKJHGSJK
VARING
HGKJDHSGKJHGKLGDJH
KLHKFG;LKNG;LKJGF;LKJGF;LKJFL;SJK
VARO!
HGKJDHSGKJHJBJKBKJBJKGS
KBVNCLKNBCVLKNLKNVLKNCVNCLVK JK
VORSICT!
HGKLFH;L;HHBHHJD
JHFKLJHJLDKLJLKDJLKFHJHSGKJHGSJK
SAFETY INFORMATION
CAUTION
CAUTION
- INVISIBLE LASER RADIATION WHEN OPEN AND
INTERLOCKS DEFEATED. AVOID EXPOSURE TO BEAM.
ADVARSEL
- USYNLIG LASERSTRÅLING NÅR DEKSEL ÅPNES OG
SIKKERHEDSLÅS BRYTES. UNNGÅ EKSPONERING FOR STRÅLEN.
ADVARSEL
- USYNLIG LASERSTRÅLING VED ÅBNING, NÅR
SIKKERHEDSAFBRYDERE ER UDEAF FUNKTION. UNDGÅ
UDSÆTTELSE FOR STRÅLING.
VARING
- OSYNLING LASERSTRÅLNING NÄR DENNA DEL ÄR
ÖPPNAD OCH SPÄRRAR ÄR URKOPPLADE. STRÅLEN ÄR FARLIG.
VARO!
-AVATTAESSA JASUOJALUKITUS OHITETTAESSA OLET
ALTTIINANÄKTMÄTÖNTÄ LASERSÄTEILYLLE. ÄLÄ KAISO
SÄTEESEEN.
VORSICT!
- UNSICHTBARE LASERSTRAHLUNG TRITTAUS, WENN
DECKEL GEÖFFNET UND WENN SICHERHEITSVERRIEGELUNG
ÜBERBRÜCKT IST. NICHT DEM STRAHLAUSSETZEN.
THIS DEVICE COMPLIES WITH PART 15 OF THE FCC RULES.
OPERATION IS SUBJECT TO THE FOLLOWING TWO CONDITIONS:-
(1) THIS DEVICE MAY NOT CAUSE HARMFUL INTERFERENCE, AND
(2) THIS DEVICE MUST ACCEPT ANY INTERFERENCE RECEIVED,
INCLUDING INTERFERENCE THAT MAY CAUSE UNDESIRED
OPERATION.
The lightning flash with arrowhead, within an equilateral tri-
angle is intended to alert the user of the presence of
uninsulated "dangerous voltage" within the product’s
enclosure; that may be of sufficient magnitude to consti-
tute a risk of electric shock to persons.
The exclamation point within an equilateral triangle is intend-
ed to alert the user of the presence of important operating
and maintenance (servicing) instructions in the literature
accompanying the appliance.
CLASS 1
LASER PRODUCT

3
SERVICE SAFETY PRECAUTIONS
1. Replacing the fuses
CAUTION: FOR CONTINUED PROTECTION AGAINST THE RISK OF FIRE REPLACE ONLY
WITH SAME TYPE OF FUSE.
Reference No Part Number Description
M507 *AH 5120-0052-0 FUSE T1.6A 250V 5X20MM
M512, M513 *AH 5120-0020-0 FU T1A 250V UL/CSA 5X20
M514 *AH 5120-0026-0 FU T315MA L 250V UL/CSA
M507 *C 5120-0050-0 FUSE T1.6A 250V 5X20MM
M512, M513 *C 5120-0018-0 FU T1A 250V SEMKO/VDE
M514 *C 5120-0027-0 FU T315MAL 250V
NOTE:
<*AH > : USA, CANADIAN MODEL ONLY.
<*C > : EUROPEAN MODEL ONLY.
2. Safety check out
(Only U.S.A. model)
Before returning the product to the customer, make leakage current or resistance measurements
to determine that exposed parts are acceptably insulated from the supply circuit.
Parts marked with the symbol are critical with regard to the risk of fire and electric shock.
Replace only with parts recommended by the manufacturer.
CONTENTS
DESCRIPTION PAGE
SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
REAR PANEL / FRONT PANEL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
DISASSEMBLY INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
WIRING DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
RF PATTERN TESTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
IMPORTANT NOTES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10-11
PCB LAYOUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12-14
SCHEMATIC DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15-16
IC BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17-19
TROUBLESHOOTING GUIDE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
ELECTRICAL PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21-26
MECHANISM EXPLODED VIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
MECHANISM EXPLODED VIEW PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
EXPLODED VIEW OF LASER CD11CA-G . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29
EXPLODED VIEW PARTS LIST OF LASER CD11CA-G . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30
EXPLODED VIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31
EXPLODED VIEW PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32
PACKING DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33

4
SPECIFICATIONS
Disc Capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . One Disc, 120 or 80 mm
Decoding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . BURR-BROWN Delta Sigma 24bit
Digital Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Times oversample
Analog Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 pole active
Frequency Response . . . . . . . . . . . . . . . . . . . . . . +/- 0.5 dB, 5Hz - 20kHz
De-Emphasis Error . . . . . . . . . . . . . . . . . . . . . . . . +/- 0.3 dB
THD (at 0 dB, 1kHz) . . . . . . . . . . . . . . . . . . . . . . . 0.007%
Intermodulation Distortion . . . . . . . . . . . . . . . . . . . < - 100 dB
(19 + 20 kHz)
Dynamic Range . . . . . . . . . . . . . . . . . . . . . . . . . . 96 dB
Linearity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +/- 0.5 dB, 0 dB to -80 dB
Signal / Noise Ratio (A-Weight) . . . . . . . . . . . . . . ³102 dB, De-Emphasis on
³102 dB, De-Emphasis off
Channel Separation 1kHz . . . . . . . . . . . . . . . . . . >90 dB
10 kHz . . . . . . . . . . . . . . . . >80 dB
Wow and Flutter . . . . . . . . . . . . . . . . . . . . . . . . . . Unmeasurable (Quartz Crystal Accuracy)
Output Impedance . . . . . . . . . . . . . . . . . . . . . . . . 200 ½
Output Level at 0 dB . . . . . . . . . . . . . . . . . . . . . . . 2.2 V rms
Digital Error Correction . . . . . . . . . . . . . . . . . . . . . CIRC with double error correction
in C1 and C2
Digital Code Output . . . . . . . . . . . . . . . . . . . . . . . Sony / Philips Serial data format
CONTROLS
Play / Pause, Stop, Random, Skip (< >), Scan (< >), Open, Time, Repeat.
PHYSICAL SPECIFICATIONS
Dimensions 435 x 80 x 285 mm
(Width x Height x Depth)
Net weight 4 kg (8.8 lbs)
Shipping weight 5.1 kg (11.22 lbs)

5
REAR PANEL / FRONT PANEL
REAR PANEL
FRONT PANEL
1. LINE OUT
2. DIGITAL OUT 3. NAD LINK 4. AC LINE CORD
1. POWER ON / OFF
2. DISC DRAWER
3. DISPLAY
4. OPEN
5. PLAY / PAUSE
6. TIME
7. STOP
8. REPEAT
9. RANDOM
10. SCAN Back ( ) / Forward ( )
11. SKIP Back ( ) / Forward ( )

6
DISASSEMBLY INSTRUCTIONS
1. Remove machine screws M 4.0 x 6.0 ( 1 to 4 ) from the side panels.
Remove tapping screw 3.0 x 8.5 5 from the back panel.
Refer to Figure No.1.
Figure No.1
2. Pull both sides of the TOP COVER slightly outwards 6 and tilt approx. 35˚ and then remove
in the direction as indicated by the arrow 7 . Refer to Figure No.2.
Figure No.2.
5
4
3
1
2
7
6
6

7
BLOCK DIAGRAM
U401 LC866008 SYSTEM CONTROL CPU & VFL DISPLAY DRIVER
Q401- Q403
MUTE CIRCUIT Q301-Q304
MUTE
J317 RCA JACK
U302 PCM1732
M318
RCA JACK
DIGITAL
OUTPUT
U402
NAD LINK
MICRO-
CONTROLLER
U403
74HC00 NAND GATE
NAD LINK
IN
M501
VFL DISPLAY
NAD LINK
OUT
M319
RCA JACK
41 4344 48
11
64
15
9
1312
109
8
11
63
57 58 1 16
19 24
47
1 2
16 13
3
42 44 43
23 24 14 13
35 36
33 34
39 40
65 67
2 4
3 6
56
L
R
L
R
CD AUDIO
O/P
10 11
30 31
5 6
35 34 39 40
4443
1
63 62
U301
LC78621
DIGITAL
SIGNAL
PROCESSOR
15 27
16 29
2 10
5
10
6
11
20 25
21 26
3
18
13 28
U101 LA9240
ANALOG SIGNAL
PROCESSOR/SERVO
TOFF
TGL
CLV-
CLV+
EFM
U701 LB1641 MOTOR DRIVER
U201 LA6541 FOCUS & TRACKING MOTOR DRIVER
LOADING
MOTOR
LOADING MOTOR
LIMIT SWITCH
SPINDLE
MOTOR
SLED
MOTOR
PU-IN
LIMIT SWITCH
PICK
UP
DISC
KEYBOARD
M113
REMOTE
SENSOR
CD MECHANISM UNIT
POWER
TRANSFORMER
AC POWER I / P
M110 M109
REPEAT
M104 M111M112
RANDOM
M106
M101 M103 M102
TIME
M108
Q101
DAC
U306 U305
4
U501,U507
DIGITAL
POWER
U502-3,U506
ANALOGUE
POWER
+8V +5V +12V 5V
-12V
D514-D517
RECTIFIER
DIODES
D501-D504
RECTIFIER
DIODES
D510-D511
ZENER DIODES
-22V
D506-D508
RECTIFIER
DIODES
U403
74HC00
NAND GATE
M303
EMC FILTER
L301
DIGITAL COIL
M500
1
8

8
WIRING DIAGRAM
MAIN BOARD
KEYBOARD
LIVE BOARD
DISPLAY BOARD
M505B M120A
M505A
BROWN
BLACK
RED
M502
M102 (15 PINS) M105 (6 PINS) M101 (5 PINS)
CD MECHANISM
TRANSFORMER
TO CHASSIS
NEUTRAL LIVE
NAD
IN/OUT

9
RF PATTERN TESTING
Testing Point
R132
Testing
Point
J334
NAD - C 541 PCB TESTING POINTS DIAGRAM
TESTING PROCEDURE
(1) Load the test disc (Sony Test CD YEDS-7) and set the unit into PLAY mode.
(2) Connect the scope to R132 (Pin 41 of U101) and DGND (J334).
Scope setting: Coupling : AC.
Vertical sensitivity : 0.2 V/ div.
Horizontal time base : 0.5 µS/div.
(3) Observe the waveform is 2.0V p-p +/-5% and the eye pattern is at its best shape (see FIG. 1).
FIG. 1 (a) FIG. 1 (b) Poor eye pattern
FIG. 1 (C) Good eye pattern
3T 4T 5T — 11T

10
IMPORTANT NOTES
INSTRUCTION FOR HANDLING OPTICAL SYSTEM BLOCK PICK-UP
Electrostatic breakdown of the laser diode in the optical system block may occur due to a poten-
tial difference caused by electrostatic charge accumulated on clothing, human body, etc. A ground
must be provided as follows to prevent any electrostatic charge during unpacking or repair work.
1. Ground for Human Body
Be sure to wear a ground band (1M ohm) that is properly to remove any static electricity that may
be charged on the body.
2. Ground for Work Bench
Be sure to place a conductive sheet (1M ohm) or copper plate with proper grounding on the work
bench or other surface on which the pick-up is to be placed.
3. Because the static electricity charge on the clothing does not discharge through the body
grounding band, do not let clothing to get in contact with the pick-up unit.
PRECAUTIONS FOR CHECKING BEAM EMISSION
The laser beam of this unit is focused on the reflecting surface of the objective lens in the optical
system block. Therefore, keep your eyes at least 12 inches (30 cm) away from the objective lens
when the laser diode is ON.
(Operation Check Method for Laser Diode and Focus Search Function.)
When the POWER switch is turned ON after the chucking plate is removed, observe the objective
lens and confirm that the following operations are performed properly.
(The optical system should be at the lead-in area position when it is checked at this time.)
(1) The laser should be at the innermost position after the chucking plate is removed.
(2) The diffused light of the laser beam can be seen when the POWER switch is turned ON.
(3) Vertical (up and down) movement of the ojective lens (2 or 3 times) will take place.
INCORRECT CORRECT
NOTE: Laser diodes are so susceptible to damage from
static electricity that even if a static discharge does not
ruin the diode, it can shorten its life or cause it to work
improperly.
1.Grounding band
1M ohm
1M ohm
2.Conducttive Sheet
or Copper Plate

11
PRECAUTIONS WHEN CHANGING LASER PICK-UP
When removing the pick-up assembly, short circuit the PCB tracks on the optical block as show in
the drawing in order to protect the pick-up before removal.
NOTE: Replacement pick-up assemblies are supplied with the PCB pattern already protected.
DO NOT REMOVE THE SHORT CIRCUITS UNTIL YOU HAVE FINISHED FITTING THE PICK-
UP.
Caution:
Laser diodes are extremely susceptible to damage from static electricity. Even if a static dis-
charge does not ruin the diode, it can shorten its life or cause it to work improperly. When replac-
ing the pick-up, use a conductive mat, a grounded soldering iron, and so on, to protect the laser
diode from static damage. Ground Conductive
Wrist Band for Body
Ground Line
Less than
10 ohm
Conductive Gum Mat
Soldering
Iron with
Ground
wire
Protective soldering place
for laser diode

12
PCB LAYOUT
LIVE BOARD
KEY BOARD
DISPLAY BOARD

1413
MAIN BOARD

15 16
SCHEMATIC DIAGRAM
D+5V RX DGND HDCD
D+5V RX DGND
DGND
HDCD
HDCD
HDCD
HDCD
0V
0V
0V
2.4V
1.6V
0V
0V
0V
4.9V
0V
4.8V
*0V
4.8V
*1.2V
4.9V
*0V
5V 0V 4.3V 2.2V 5V 0V 0V 0V 5V 5V 2.4V 0V 1.1V *2.7V 1.2V *2.7V
*7.4V 7.8V 2.5V 2.5V 2.5V 3.4V 3.4V 0V 0V 0V 3.5V 3.5V 2.5V 2.5V 4.8V 4.9V
*7.4V 7.8V
*5V 0V
2.4V 2.5V
*3.3V
3.5V
*2.9V
3.5V
0V 0V 0V
3.4V 3.4V 2.5V 2.5V
5V
*7.4V
7.8V
0V 0V 5V 5V 5V 5V 4.9V 4.9V 4.9V 4.9V 0V 4.8V 2.6V 2.4V
∆4.9V
#0V
#4.9V
∆0V
2.4V 2.4V 2.4V 2.4V 2.4V 2.4V 2.4V 2.4V 2.4V 2.4V 2.4V 2.4V 2.4V 2.4V
2V
3.7V
0V
0V
0V
0V
0V
0V
2.4V
2.4V
2.4V
2.4V
2.4V
2.4V
2.4V
2.4V
2.4V
2.4V
5V
0V
3.3V
1.6V
0V
4.7V
4.8V
0V
0V
0V
0V *1.8V
5V
5V
0V
4.9V
4.9V
5V
2.3V 2.2V 0V 0V 2.4V 2.3V 4.9V 4.9V 4.9V 0V
0V
2.4V
2.4V
3V *1.6V
0V *1.8V
0V
0V 0V 0V 0V 0V 0V 0V 0V 0V 0V 0V 0V 0V2.4V 2.4V5V
0V
0V
*1.4V
4.6V
0V
1.7V
5V
1.5V
*0.3V 0V
2.3V
2.5V
2.5V
0V
*0.4V 0V
0V
0V
0V
0V
0V
0V
4.9V
4.9V
2.3V
0.2V
*0V 4.9V
0V
0.7V
0.5V
0V
0V
7.8V
7.8V
0.7V
0.5V
∆0.06V #4.2V
*1.2V 3V
2.4V
2.4V
2.1V
2.3V
2.3V
0V
0V
2.4V
2.5V
0V
5V
5V
0V
5V
0V
4.9V
0V
2.3V
0V
0V
2.4V
2.5V
5V
5V
5V
HDCD
R428
560R
DGND
RESISTORS: M- METAL FILM
F- FUSIBLE
CARBON FILM UNLESS OTHERWISE SPECIFIED.
NOTE: 1. RESISTORS, UNLESS OTHERWISE SPECIFIED, ARE 1/8W.
2. ALL CERAMIC CAPACITORS, UNLESS OTHERWISE SPECIFIED, ARE 50V 10%.
3. COMPONENTS MARKED “ ” ARE SAFETY CRITICAL PARTS.
4. VOLTAGE SPECIFIED ON THE IC’S PIN WHICH DOES NOT HAS MARKING IS IN STOP MODE,
MARKED WITH “*” IS PLAY MODE, “#” IS TRAY OPEN MODE AND “∆“ IS TRAY CLOSE MODE.

64
VCC1
63
LDS
62
LDD
61
BH1
60
PH1
59
LF2
58
VR
57
REFI
56
VCC2
55
FSS
54
DRF
53
CE
52
DAT
51
CL
50
CLK
49
DEF
48 NC
47 TBC
46 FSC
45 DGND
44 SLI
43 SLC
42 RFS–
41 RFSM
40 CV+
39 CV–
38 SLOF
37 HFL
36 TES
35 TOFF
34 TGL
33 JP+
32
JP–
31
SL+
30
SL–
29
SLD
28
SLEQ
27
SPD
26
SP–
25
SPG
24
SPI
23
SP
22
AGND
21
FE–
20
FE
19
FA–
18
FA
17
FD–
1
FIN2
2
FIN1
3
E
4
F
5
TB
6
TE–
7
TE
8
TESI
9
SCI
10
TH
11
TA
12
TD–
13
TD
14
JP
15
TO
16
FD
REF
BAL
I/V
TE
T.SERVO & T.LOGIC
F.SERVO & F.LOGIC SPINDLE SERVO
SLC
APC
RF DET
VCA
RF Amp
µ- com
INTER FACE
VCA
SLED SERVO
17
IC BLOCK DIAGRAM
U101: LA9240
EFMO
DEFI
EFMIN
LRSY
C2F
ROMXA
DOUT
ASDACK
ASDFIN
ASDFIR
ASLRCK
DACKO
DFOLO
DFORO
LRCKO
FSEQ
CLV+
CLV–
V/P
PW,SBCK
SBSY,SFSY
WRQ,SQOUT
CQCK
COIN
RWC
DEMO
FST,FOCS
FZD
HFL,RES
TES,JP+
TOFF,JP–
THLD,TGL
EMPH
LASER
16M
4.2M
CS
CONT
EFLG
FSX
XIN
XOUT
XVDD,XVSS
CK2
RVDD,RVSS
MUTER
RCHP
RCHN
LVDD,LVSS
LCHN
LCHP
TGL
EFMO
VVDD VVSS PDO ISET PCK TAI TST11 TST10 TSET1 TEST2 TEST3 TEST4 TEST5 VDD VSS
2K x 8-bit RAM RAM address
generator
Interpolation
and muting
Antishock
interface
Digital
attenuator
8x oversampling
digital filters
Level meter
Peak meter
Crystal oscillator system
Timing generation
C1 AND C2 ERROR DETECTION
AND CORRECTION
FLAG PROCESSING
CLV DIGITAL
SERVO
SUBCODE
SEPARATION
Q CRC
MICROPROCESSOR
INTERFACE
Slice level
control
VCO clock Oscillator
Clock control
SYNCHRONIZATION
DETECTION
EFM DEMODULATION
SERVO
COMMAND
Digital
output
1bit DAC
10
9
6
3 5
21
2
69 37 80 12 26 31 74 27
42
45
8 4
44
56
38
39
40
41
36
34
33
46 48 49 52 53 55 43 77 62 58 73 75 70
32
23,29 20,28
68,19
16,17
18
30
64
66
67
63,65
57,60
59,61
15
14
13
22
11
1
24,25
72 71 78
76,79 51,54 47,50
35
U301: LC78621ED

18
1 28 ML/I2SLRCIN
2 27 MC/DEMDIN
3 26 MD/FSS
BCKIN Serial
Input
I/F
Mode
Control
I/F SCK
BPZ Control
Crystal/OSC
XTI XTO CLKO VCC1 AGND1 VDD DGND
Power Supply
Power-On Reset
HDCD
8X
Oversampling
Digital Filter with
Enhanced
Multi-level
Delta Signal
Modulator
DAC Low-pass
Filter
VOUTL
VCC2L AGND2L VCC2R AGND2R
EXTL
VOUTR
EXTR
ZERO
Low-pass
Filter
DAC
LRCIN
DIN
MUTE
RST
MODE
CS/IWO
MD/FSS
MC/DEM
ML/I2S
BCKIN
4 25 MUTECLKO
5 24 MODEXTI
6 23 CS/1WOXTO
7PCM1732U 22 RSTDGND
8 21
20
ZEROVDD
9GAINHDCD
10 19 VCC2LVCC2R
11 18 AGND2LAGND2R
12 17 EXTLEXTR
13 16 VOUTLVOUTR
14 15 VCC1AGND1
HDCD
Hidden
Code
Recovery
HDCD
Amplitude
Decoding
U302: PCM1732
INPUT
Port 3
Counter
Timers (2)
Interrupt
Control
Two Analog
Comparators
Port 2
I/O
(Bit Programmabel)
1
P24
P25
P26
P27
P28
XTAL 2
XTAL 1
P31
P32
P23
P22
P21
P20
GND
P02
P01
P00
P33
18
9 10
I/O
Vcc
ALU
OTP
Program
Counter
Machine
Timing & Inst.
Control
FLAG
Flegister
Pointer
General-Purpose
Register File
Port 0
GND XTAL
1
VCC
2
MUTE
3
V IN1
4
VG 1
5
Vo1
6
Vo2
7
GND
8
GND
9
GND
10
Vo3
11
Vo4
12
VG2
13
V IN2
14
REG OUT
15
REG IN
30 VCC
29 V REF
28 V IN4
27 VG 4
26 Vo8
25 Vo7
24 GND
23 GND
22 GND
21 Vo6
20 Vo5
19 VG3
18 V IN3
17 CD
16 RES
Level shift
4
Level shift
1
BTL AMP
4
BTL AMP
1
11K½11K½
11K½11K½
Vcc
BTL AMP
3
BTL AMP
2
Level Shift
3
Level Shift
2
Regulator RESET
U402: NADLINK(MASKED) U201: LA6541D

AMPLIFIER 1
OUTPUT
INVERTING
INPUT
NON-INVERTING
INPUT
V –
AMPLIFIER 2
V +
OUTPUT
INVERTING
INPUT
NON-INVERTING
INPUT
1
2
3
4
8
7
6
5
+ –– +
19
U305-U306: OPA2604
1A1 14 VCC
2B1 13 B4
3Y1 12 A4
4A2 11 Y4
5B2 10 B3
6Y2 9 A3
7GND 8 Y3
P1 OUT1 VCC2 OUT2 P2
3 2 8 10 9 7
4
5
1
6
VCC1
VZ
IN1
GND
IN2
Predriver
Input logic circuit
U403: 74HC00 U701: LB1641
P17/PWM
P16/BUZ
P15/SCK1
P14/SI1/SB1 P13/SO1
P12/SCK0 P11/SI0/SB0
P10/SO0
P07 P06 P05 P04
P02
P03
P01
P00
S0/T0
S1/T1
S2/T2
S3/T3 S4/T4
S5/T5 S6/T6
S7/T7
S8/T8 S9/T9
S10/T10 S11/T11
S13/T13
S12/T12
S14/T14
S15/T15
S29
S28
S27
S26
S25
S24
S23
S22
S21
S20
S19
S18
S17
S16
VP
VDDVPP
TEST 1
RES
XT1
XT2
VSS
CF1
CF2
VDD
P80/AN0
P81/AN1
P82/AN2
P83/AN3
P70/INTO
P71/INT1
P72/INT2/TOIN
P73/INT3/TOIN
48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
Interrupt Control
Stand-by Control
Bus Interface
Port1
Port7
Port8
Base Timer
SIO0
SIO1
Timaer 0
Timaer 1
ADC
Bus
Bus
IR PLA
ROM
PC
ACC
B Reg
PSW
RAR
RAM
Stack Pointer
PORT 0
Watcher Dog Timer
C Reg
ALU
INT0-3
Noise Filter
Real Time
Service
XRAM
(128 bytes)
VFD Controller
High Voltage
Output
Clock
Generator
CF
RC
X'tal
U401: LC866008C IC401: System Block Diagram LC8660/08C

20
TROUBLESHOOTING GUIDE
SET POWER SWITCH TO ON.
IS POWER TURNED ON ?
CHECK FUSES
M507, M512-M514 OPEN ?
M507,M512-M514 DEFECTIVE CRYSTAL M401 DEFECTIVE.
MICROPROCESSOR IC U401 DEFECTIVE.
MOTOR DRIVE IC U701 DEFECTIVE.
CAN TRAY BE OPENED ?
CAN TRAY BE CLOSED ?
DOES INITIAL READING OCCUR ?
CAN DISC BE PLAYED ? CHECK TRACKING SERVO CIRCUIT CORRECT ? SERVO IC U101 OR U201 DEFECTIVE.
CHECK DISC OR MECHANISM AND CONNECTOR
CHECK OUTPUT PULSE AT PIN 42,43,44 OF U301
CHECK OUTPUT SIGNAL AT PIN 13,16 OF U302
AUDIO OUTPUT IS CORRECT ? IS POWER SUPPLY NORMALLY ? CHECK POWER SUPPLY PATTERNS.
OK
CHECK POWER SUPPLY
CIRCUIT NORMAL ?
IC U302 DEFECTIVE.
CHECK OUTPUT SIGNAL AT PIN 1,7 OF U305, U306 IC U305 OR U306 DEFECTIVE.
CHECK OUTPUT SIGNAL AT PIN 7,1 OF U305, U306 IC U305 OR U306 DEFECTIVE.
CHECK MUTE CIRCUIT Q301, Q302, Q303, Q304
LINE OUT PLUG OR PATTERNS DEFECTIVE.
MUTE CIRCUIT DEFECTIVE.
IC U301 DEFECTIVE.
M101 SWITCH, DEFECTIVE
OR PATTERN AND CONNECTOR OPEN.
IS OSCILLATOR CIRCUIT
OSCILLATING ?
POWER SUPPLY PATTERNS OPEN
OR U501-U507 DEFECTIVE.
IS THERE OPEN/ CLOSE KEY SIGNAL
INPUT ? U401 PIN 39, 40
IS LOADING MOTOR DRIVE CIRCUIT
OPERATION NORMAL ? U701, PIN 2,10
CHECK OPEN/ CLOSE SIGNAL AT U401
PIN 39 PIN 40
TRAY OPEN H L
TRAY CLOSE L H
LOADING MOTOR AND LEAD WIRE DEFECTIVE
OR LOADING PART OF MECHANISM DEFECTIVE.
CHECK LASER LIGHT ? DOES LENS MOVE UP AND DOWN ?
RF SIGNAL OUTPUT ?
U101 DEFECTIVE.
FEED MOTOR OR WIRING DEFECTIVE.
CHECK FOCUS SIGNAL OUTPUT ?
U101 DEFECTIVE.
CHECK CONNECTION OR PICKUP.
CHECK LASER CIRCUIT CORRECT ?
CONNECTION OR PICKUP DEFECTIVE.
YES
YES
YES
YES
YES
YES
YES
YESNO
NO
NO
NO
YES
YES
YES YES YES
NO
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
NO NO NO
NO
NONO
NO
NO
NO NO
NO
NO
NO
CHECK CLOCK PULSE AT PIN4 OF U302 M302 OR U302 DEFECTIVE.
YES
NO
NO
NO
NO
NO
NO

21
ELECTRICAL PARTS LIST
Reference No. Part No. Description
DISPLAY ASSEMBLY
PCB BOARD
1000 PCB-N0960C-DISP DISPLAY ASSEMBLY
LED
LED1 3700-2810-R LED RED 3MM SP L-93XHD
IR SENSOR
M113 4816-043T-3 IR SENSOR PIC-26043TM2 KODENSHI
VFL
M501 2460-1870-0 VFD 6-BF-271GK
KEYBOARD ASSEMBLY
PC BOARD
2000 PCB-N0960C-KEY KEYBOARD ASSEMBLY
RESISTORS
R601 4701-102J-C RCF 1/8W 1K 5% ATS
R602 4701-821J-C RCF 1/8W 820R 5% ATS
R603 4701-471J-C RCF 1/8W 470R 5% ATS
R604 4701-391J-C RCF 1/8W 390R 5% ATS
R605 4701-102J-C RCF 1/8W 1K 5% ATS
R606 4701-821J-C RCF 1/8W 820R 5% ATS
R607 4701-471J-C RCF 1/8W 470R 5% ATS
R608 4701-391J-C RCF 1/8W 390R 5% ATS
SWITCHES
M101-M104,M106 5200-3538-0 SWITCH, TACT SKHHBY 7MM HIGH
M108-M112 5200-3538-0 SWITCH, TACT SKHHBY 7MM HIGH
LIVE ASSEMBLY
PC BOARD
3000 *AH PCB-N0960C-LIVE LIVE ASSEMBLY
3000 *C PCB-N0961C-LIVE LIVE ASSEMBLY
CAPACITOR
C800 8910-0049-0 CAP400V 4700P DE7150F472MVA1KC
POWER SWITCH
M802 5200-3151-0-01 POWER SWITCH
TRANSFORMER
M810 *C 1806-2170-0 EMI FILTER TLN12UA 150W3R0
TRANSFORMER ASSEMBLY
TRANSFORMER
M500 1806-2512-0 TRANSFORMER N0870C I/P 120/230V TOROIDAL
FUSE ASSEMBLY

FUSES
M507 *AH 5120-0052-0 FUSE T1.6A 250V 5 x 20MM
M507 *C 5120-0050-0 FUSE T1.6A 250V 5 x 20MM
M512, M513 *AH 5120-0020-0 FU T1A 250V UL/CSA 5 x 20
M512, M513 *C 5120-0018-0 FU T1A 250V SEMKO/VDE
M514 *AH 5120-0026-0 FU T315MA L 250V UL/CSA
M514 *C 5120-0027-0 FU T315MAL 250V
MAIN ASSEMBLY
PC BOARD
4000 PCB-N0960C-MAIN MAIN ASSEMBLY
CAPACITORS
C101 150F-104K-2-FC CC 50V 0.1µF 10% AT
C104 153F-333J-5-MS CM 50V 0.033µF 5% RL
C105 150F-331K-2-FC CC 50V 330pF 10% AT 3.5x
C106 153F-473J-5-NR CM 50V 0.047µF 5% RL
C107 157F-104M-5-GMK CE 50V 0.1µF 20% RL
C108 153F-332J-5-KW CM 50V 3300pF 5% RL 6x12
C109 153F-154J-5-NLM CM 50V 0.15µF 5% RL
C111,C113 150F-104K-5-II CC 50V 0.1µF 10% RL 5x5
C114 153F-683K-5-OS CM 50V 0.068µF 10% RL 8x
C115 153F-183J-5-KJ CM 50V 0.018µF 5% RL
C116 153F-332J-5-KW CM 50V 3300pF 5% RL 6x12
C117 150F-101K-2-FC CC 50V 100pF 10% AT 3.5x
C118 157F-224M-5-GMK CE 50V 0.22µF 20% RL 4X7
C119 157E-475M-5-GMK CE 25V 4.7µF 20% RL 4x7
C120 157C-226M-5-IUK CE 10V 22µF 20% RL 5X11
C121 153F-332J-5-KW CM 50V 3300pF 5% RL 6x12
C122 15CH-050D-5-GG CTC 0/60 5pF 0.5pF RL
C123 153F-222J-5-IM CM 50V 2200pF 5% RL 5X7
C124 15CH-120J-5-GG CTC 0/60 12pF 5% RL 4x4
C125 153F-333J-5-MS CM 50V 0.033µF 5% RL
C126 157E-106M-5-GMK CE 25V 10µF 20% RL 4X7
C127 153F-103J-5-IM CM 50V 0.01µF 5% RL 5X7
C128,C129 157B-107M-5-KMK CE 6.3V 100µF 20% RL
C130 153F-103J-5-IM CM 50V 0.01µF 5% RL 5X7
C131 153F-473J-5-NR CM 50V 0.047µF 5% RL
C132 157F-334M-5-GMK CE 50V 0.33µF 5% RL
C133 153F-102J-5-IM CM 50V 1000pF 5% RL 5x7
C134 157C-476M-5-IMK CE 10V 47µF 20% RL 5X7
C135 157B-227M-5-LMK CE 6.3V 220µF 20% RL
C136 150F-104K-5-II CC 50V 0.1µF 10% RL 5x5
C137 153F-103J-5-IM CM 50V 0.01µF 5% RL 5X7
C138 157E-106M-5-GMK CE 25V 10µF 20% RL 4X7
C139 157B-107M-5-KMK CE 6.3V 100µF 20% RL
C140 150F-104K-5-II CC 50V 0.1µF 10% RL 5x5
C141 157F-225M-5-GMK CE 50V 2.2µF 20% RL 4x7
C142 153F-102J-5-IM CM 50V 1000pF 5% RL 5x7
C152 153F-103J-5-IM CM 50V 0.01µF 5% RL 5X7
C157 157C-477M-5-OVK CE 10V 470µF 20% RL
C202 157C-108M-5-S5K CE 10V 1000µF 20% RL
C204 157D-106M-5-GMK CE 16V 10µF 20% RL 4x7
C205 153F-103J-5-IM CM 50V 0.01µF 5% RL 5X7
C301,C302 150F-104K-5-II CC 50V 0.1µF 10% RL 5x5
C303 153F-223J-5-LQ CM 50V 0.022µF 5% RL
C304,C308 157B-107M-5-KMK CE 6.3V 100µF 20% RL
C310 150F-104K-5-II CC 50V 0.1µF 10% RL 5x5
C311 150F-101K-2-FC CC 50V 100pF 10% AT 3.5x
22
Reference No. Part No. Description