This service manual consists of "DC-S800U" (Main unit : 129 574 02), "RB-C30" (Remote control),
"SX-S800L" (Speaker system : 165 007 02) and "SX-S800R" (Speaker system : 165 008 02).
IC block diagram & description ........................................ 18
IC & Transistor voltages...................................................23
• If the operation of the unit or display is not normal, or you wish
to clear the contents of the memory.
1. Disconnect the power cord from AC outlet.
2. Press the RESET button for at least 20 seconds.
3. Connect the power cord.
4. Press the POWER button to turn the power on.
- 1 -
RESET
FM
75
AM
LOOP
RESET
VIDEO/DVD
(AUDIO)
R
L
IN
R
L
SPEAKERS
(6ΩMIN.)
SUB WOOFER
LASER BEAM SAFETY PRECAUTION
CAUTION – INVISIBLE LASER RADIATION WHEN OPEN AND
INTERLOCKS DEFEATED. AVOID EXPOSURE TO BEAM.
EXT.
ANT.
FM
75
AM
LOOP
ANT.
ADVARSEL – USYNLIG LASER STRÅLING VED ÅBNING, NÅR
SIKKERHEDSAFBRYDERE ER UDE AF FUNKTION, UNDGÅ UDS ÆTTELSE
FOR STRÅLING.
VARNING – OSYNLIG LASER STRÅLNING NÄR DENNA DEL ÄR ÖPPNAD
RESET
VIDEO/DVD
R
(AUDIO)
L
IN
R
L
SPEAKERS
(6ΩMIN.)
OUT
OPTICAL DIGITAL
OCH SPÄRR ÄR URKOPPLAD. STRÅLEN ÄR FARLIG.
VORSICHT – UNSICHTBARE LASERSTRAHLUNG TRITT AUS, WENN
DECKEL GEÖFFNET UND WENN SICHERHEITSVERRIEGELUNG
ÜBERBRÜCKT IST. NICHT, DEM STRAHL AUSSETZEN.
VARO – AVATTAESSA JA SUOJALUKITUS OHITETTAESSA OLET ALTTIINA
NÄKYMÄTTÖMÄLLE LASERSÄTEILYLLE. ÄLÄ KATSO SÄTEESEEN.
CD PICK-UP MAINTENANCE
About pick-up (Optical lens) Cleaning
Clean the lens with the specified cleaning disc or moisten a cotton swab with isopropyl alcohol and cleaning paper.
Regarding procedure of cleaning with moisten cotton swab, please refer to the attached as follows.
1. Cotton swab wrapped with Cleaning paper.
2. Add the isopropyl alcohol.
3. Gently move the tip of cotton swab just like a draw a whirlpool from inside to outside on the surface of lens.
SERVICE MODE
1. Preparation
Press the unit's STOP and FM MODE buttons at the same time. (This initiates service mode entry status.)
Next, press another button on the unit to switch to the corresponding service mode.
The unit enters a service mode only if another button is pressed during that 1 second.
2. CD Repair
1. Within 1 second of activating service mode entry status, press the CD BACK button to enter this service mode.
2. When in the CD function mode the LCD segment displays a CD operation indication that is different from its normal indication.
If a CD error occurs, a display appears as shown in below.
Also, from the point at which the error occurred onward, the CD operation display is fixed. The fixed displays is canceled by
pressing the STOP button when the CD is stopped.
3. Press the POWER button to cancel this mode.
Disc No.State of CD Error
0 Good
1 Focusing is not possible in focus serch.
2 The subcode is not input during disc startup.
3 TOC can not be read.
4 Focus was lost while the servo was on. (during playing, etc.)
5 The subcode is not input while the servo in on. (during playing, etc.)
3. Checking the FL connection
1. Within 1 second of activating service mode entry status, press the TUNING UP button to enter this service mode.
2. FL and LED turns on order when enter this mode.
3. When every indication turns on, become on and off light indication.
4. Press the POWER button to cancel this mode.
- 2 -
CD PLAYER ADJUSTMENTS
1. CABLE CONNECTION
1 ASSY, CONNECTOR-S (614 303 5633)
2. ADJUSTMENTS
(1) Confirm the tracking balance
1. Connect an Oscilloscope to TP2 (TE) and TP1 (VC).
2. Turn on the POWER switch.
3. Set the test disc. (DISC 1)
4. Press "STOP" button and "FM MODE" button simultaneously.
Within 1 second after pressing the "PLAY/PAUSE" button.
(SERVICE MODE : Tracking balance adjustment mode)
5. Confirm that the oscilloscope waveform is symmetrical on the
top and bottom in relation to 0V (VC).
SPINDLE / SLED
MOTOR P.W.B
CD P.W.B
1
CONNECTOR 6pin
(2) Checking the "eye" pattern
1. Switch "ON" the POWER.
2. Connect an oscilloscope to TP4 (RF) and TP1 (VC).
3. Load the test disc.
4. Press the PLAY button.
5. Check to be sure that the "eye" pattern is at the center of
waveform and that the diamond shape is clearly defined.
6. Press the STOP button.
7. Turn off the POWER switch.
- 3 -
200mV/div.
5ms/div.
TP4
(RF)
TP1
(VC)
+
OSCILLOSCOPE
-
a
OPENING EXPANDED
b
TAPE ADJUSTMENTS
Adjustment ItemTest TapeMeasuringOutput connectionAdju stAdjus t
Instrumentlocationvalue
(a) HEAD AZIMUTHVTT738 etc.AC-voltmeterSPEAKER TERMINALHEAD AZIMUTHMax.
DECK "A"(10KHz)SCREW
(b) HEAD AZIMUTHVTT738 etc.AC-voltmeterSPEAKER TERMINALHEAD AZIMUTHMax.
DECK "B"(10KHz)SCREW
(c) MOTOR SPEEDMTT-111FREQUENCYSPEAKER TERMINALVR3113,000Hz
(NORMAL)(3,000Hz)COUNTER
1. HEAD REPLACEMENT AND AZIMUTH ADJUSTMENT
(1) Head replacement
1. After replacement, demagnetize the heads by using a
degausser.
2. Be sure to clean the heads before attempting to make any
adjustments.
3. Be sure both channels (1 and 2) are the same level.
(Using a dual-channels oscilloscope).
4. All wiring should be returned to the original position after
work is completed.
(2) Head azimuth
• DECK "A"
1. Load a test tape (VTT-738,etc.: 10kHz) for azimuth
adjustment.
2. Press the PLAY button.
3. Use a flat-tip (-) screwdriver to turn the screw for normal
azimuth adjustment so that the left and right outputs are
maximized at the same phase during normal playback.
4. Press the STOP button.
TAPE ’’A’’
PLAY HEAD
EARTH
RED
WHITE
YELLOW
TAPE ’’B’’
R/P HEAD
RED
WHITE
EARTH
E. HEAD
YELLOW
ORANGE
• DECK "B"
1. Load a test for azimuth adjustment.
2. Press the PLAY button.
3. Azimuth screw adjustment.
4. Press the STOP button.
REVERSE
NORMAL
TAPE "A"
REVERSE
NORMAL
TAPE "B"
• After making the adjustment, secure the azimuth
adjustment screw by applying screw lock (TB-1401B).
- 4 -
TAPE ADJUSTMENTS
2. MOTOR REPLACEMENT AND SPEED ADJUSTMENT
(1) Motor replacement
(2) Motor speed
1. Insert the test tape (MTT-111 or etc. 3,000 Hz) into DECK A.
2. Press the PLAY button.
3. Adjust VR311 so that the frequency counter show a reading
of 3,000 ± 10 Hz.
4. Press the STOP button.
3. CHECKING THE MECHANISM TORQUES
• Clean the head, capstan and pinch roller before making any measurement.
1voltage--- TP11(H), TP12(E).1611 kHZHigh---less than 9.0V
InputOutput
Antenna, IRE Loop, Distance: 60 cm
Connection
SGSetAdjustmentRemark
Frequency Position
522 kHZLowL2153
1.0V±0.05V
LWCover---Connect Digital DC voltmeter t
144 kHZLowL2154
voltage--- TP11(H), TP12(E).288 kHZHigh---less than 9.0V
M WTracking Connect AM SG to Loop Ant. Connect to VTVM603 kHZLowL2152Max.
2
SG≒80dBμV
TP25(L) or TP26(R), TP27(E).1404 kHZHighCT252
LWTracking Connect AM SG to Loop Ant.162 kHZLowL2151Max.
SG≒85dBμV
279 kHZHighCT251
- 6 -
1.0V±0.05V
EXPLODED VIEW (CABINET & CHASSIS)
49
Y20
Y20
Y29
Y29
Y20
Y20
Y20
Y20
Y20
50
53
64
52
66
Y21
Y22
Y22
Y22
Y21
48
Y19
Y17
Y17
Y18
Y16
Y16
Y11
Y12
Y13
9
1
7
8
10
11
12
15
15
13
13
14
42
42
45
43
54
44
46
Y11
Y12
Y15
Y13
Y14
Y15
Y02
Y02
Y02
Y03
Y03
Y03
Y25
Y24
Y25
Y28
Y27
Y26
Y10
Y10
Y04
Y05
Y04
Y01
Y01
Y01
75
71
72
78
80
81
79
63
61
Y23
Y23
76
77
62
51
2
3
4
5
6
16
17
18
19
21
20
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
39
38
40
41
47
73
74
Y07
Y08
Y06
Y09
55
- 7 -
PARTS LIST
PRODUCT SAFETY NOTICE
EACH PRECAUTION IN THIS MANUAL SHOULD BE FOLLOWED DURING SERVICING. COMPONENTS IDENTIFIED WITH THE IEC
!!
SYMBOL
SPECIAL SIGNIFICANCE. WHEN REPLACING A COMPONENT IDENTIFIED BY
OR PARTS WITH THE SAME RATINGS OF RESISTANCE, WATTAGE OR VOLTAGE THAT ARE DESIGNATED IN THE PARTS LIST
IN THIS MANUAL. LEAKAGE-CURRENT OR RESISTANCE MEASUREMENTS MUST BE MADE TO DETERMINE THAT EXPOSED
PARTS ARE ACCEPTABLY INSULATED FROM THE SUPPLY CIRCUIT BEFORE RETURNING THE PRODUCT TO THE CUSTOMER.
CAUTION:Regular type resistors and capacitors are not listed. To know those values, refer to the schematic diagram.
!
IN THE PARTS LIST AND THE SCHEMATIC DIAGRAM DESIGNATED COMPONENTS IN WHICH SAFETY CAN BE OF
!!
!
, USE ONLY THE REPLACEMENT PARTS DESIGNATED,
Regular type resistors are less than 1/4 W carbon type and 0 ohm chip resistors.
Regular type capacitors are less than 50 V and less than 1000 µF type of Ceramic type and Electrical type.