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SERVICE MANUAL
XR-MK25 HC,HR
COMPACT DISC
STEREO SYSTEM
BASIC TAPE MECHANISM : 2ZM1 YR6N
BASIC CD MECHANISM : 3ZG3 E2NC
S/M Code No. 09-989-284-0OT
SYSTEM
XRMK25
REMOTE
CONTROLLER
SXM25B
SPEAKER
RC8AT02


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2
SPECIFICATIONS ................................................................................................................3
PROTECTION OF EYES FROM LASER BEAM DURING SERVICING ..........................................4
PRECAUTION TO REPLACE OPTICAL BLOCK .......................................................................4
ELECTRICAL MAIN PARTS LIST ................................................................................... 5 ~ 9
CHIP RESISTOR PART CODE ..............................................................................................9
TRANSISTOR ILLUSTRATION ............................................................................................. 10
BLOCK DIAGRAM 1 (MAIN / FRONT / AC2 / AC1 / DECK / RELAY) .............................. 11 ~ 12
BLOCK DIAGRAM 2 (VCD / VCD POWER / CD DRIVE / CD MOTOR) .......................... 13 ~ 14
WIRING 1 (MAIN) ................................................................................................. 15 ~ 16
SCHEMATIC DIAGRAM 1 (MAIN : 1 / 2 / AC2 / AC1 / RELAY) .................................... 17 ~ 18
SCHEMATIC DIAGRAM 2 (MAIN : 2 / 2 TUNER BLOCK) ......................................... 19 ~ 20
IC BLOCK DIAGRAM 1 ......................................................................................... 21 ~ 22
WIRING 2 (FRONT / DECK / RELAY) ......................................................................... 23 ~ 24
SCHEMATIC DIAGRAM 3 (FRONT / DECK) ............................................................... 25 ~ 26
WIRING 3 (VCD : 1 / 2 / VCD POWER / CD DRIVE / CD MOTOR) ................................ 27 ~ 28
WIRING 3 (VCD : 2 / 2) .......................................................................................... 29 ~ 30
SCHEMATIC DIAGRAM 4 (VCD : 1 / 2 / VCD POWER / CD DRIVE / CD MOTOR) .......... 31 ~ 32
SCHEMATIC DIAGRAM 5 (VCD : 2 / 2) ................................................................... 33 ~ 34
WIRING 4 (AC2 / AC1) ................................................................................................... 35
FL (11BT162GK) GRID ASSIGNMENT / ANODE CONNECTION .............................................. 36
WAVEFORM (VCD) ........................................................................................................... 37
IC BLOCK DIAGRAM 2 ......................................................................................... 38 ~ 41
IC DESCRIPTION ..................................................................................................... 42 ~ 52
ADJUSTMENT 1 <TUNER> ................................................................................... 53 ~ 54
PRACTICAL SERVICE FIGURE ............................................................................................ 54
ADJUSTMENT 2 <DECK>.............................................................................................. 55
PRACTICAL SERVICE FIGURE ............................................................................................ 55
ADJUSTMENT 3 <VCD> ...................................................................................... 56 ~ 58
MECHANICAL EXPLODED VIEW 1 / 1 ....................................................................... 59 ~ 60
MECHANICAL PARTS LIST 1 / 1 ....................................................................................... 61
SPRING APPLICATION POSITION ...................................................................................... 62
TAPE MECHANISM EXPLODED VIEW 1 / 1 ............................................................... 63 ~ 64
TAPE MECHANISM PARTS LIST 1 / 1 ............................................................................... 65
CD MECHANISM EXPLODED VIEW 1 / 2 ............................................................................ 66
CD MECHANISM PARTS LIST 1 / 2 ................................................................................... 67
CD MECHANISM EXPLODED VIEW 2 / 2 ............................................................................ 68
CD MECHANISM PARTS LIST 2 / 2 ................................................................................... 68
ACCESSORIES / PACKAGE LIST ......................................................................................... 69
TABLE OF CONTENTS


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3
SPECIFICATIONS
Design and specifications are subject to change
without notice.
<FM Tuner section>
Tuning range
87.5MHz to 108MHz
Usable sensitivity(IHF)
13.2dBf
Antenna terminals
75ohms (unbalanced)
<AM Tuner section>
Tuning range
531kHz to 1602kHz
(9kHz step)
530kHz to 1710kHz
(10kHz step)
Usable sensitivity
350µV/m
Antenna
Loop antenna
<Amplifier section>
Power output
Rated: 16W + 16W
(6ohms, T.H.D. 1%, 1kHz)
Reference: 20W + 20W
(6ohms, T.H.D. 10%, 1kHz)
Total Harmonic distortion
0.08%
(10.5W, 1kHz, 6ohms)
Inputs
VIDEO/AUX: 400mV
MIC: 1.8mV (10kohms)
Outputs
VIDEO OUT:
1.0Vp-p (75ohms)
AUDIO OUT:
530mV (47kohms)
SUPER WOOFER: 1.0V
SPEAKERS: accepts speakers
of 6ohms or more
PHONES (stereo minijack):
accepts headphones of
32ohms or more
<Cassette deck section>
Track format
4 tracks, 2 channels stereo
Frequency response
CrO
2 tape:
50Hz 1600Hz
Normal tape:
50Hz 15000Hz
Signal-to-noise ratio
50dB (CrO
2 tape peak level
above 1kHz)
Recording system
AC bias
Heads
Recording/playback head x 1
Erase head x1
<Compact disc player section>
Laser
Semiconductor laser
(=780nm)
D-A converter
1 bit dual
Signal-to-noise ratio
75dB (1kHz, 0dB)
Harmonic distortion
0.1% (1kHz, 0dB)
Wow and flutter
Unmeasurable
Video signal
NTSC/PAL color format
(selectable)
Video data
MPEG 1
Audio data
MPEG 1, LAYER 2
<General>
Power requirements
AC: 120V/220V 240V,
switchable, 50/60Hz
Power consumption
55W
Dimensions of main unit
173 x 255.2 x 248.8mm
(W x H x D)
(67/
8 x 10
1
/
8 x 9
7
/
8in.)
Weight of main unit
3.65kg (8lbs 1oz.)
<Speaker system>
Cabinet type
2 way, bass reflex
(magnetic shield type)
Speaker
Woofer:
120mm (43/
4 in.) cone type
Tweeter:
20mm (13/
16in.) ceramic
type
Impedance
6ohms
Output sound pressure level 87dB/W/m
Dimensions (W x H x D)
155 x 253 x 220mm
(61/
8 x
10 x 83/
4in.)
Weight
2.6kg (5lbs 12oz.)


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PROTECTION OF EYES FROM LASER BEAM DURING SERVICING
(KSS-213F)
Body or clothes electrostatic potential
could
ruin laser diode in the optical
block. Be sure
ground body
and workbench, and use the
clothes do not touch the diode.
1) After the connection, remove solder
shown in right figure.
Precaution to replace Optical block
Solder
PICK­UP Assy P.C.B.
PROTECTION OF EYES FROM LASER BEAM DURING SERVICING
(KSS-213F)
Body or clothes electrostatic potential
could
ruin laser diode in the optical
block. Be sure
ground body
and workbench, and use the
clothes do not touch the diode.
1) After the connection, remove solder
shown in right figure.
Precaution to replace Optical block
Solder
PICK­UP Assy P.C.B.
CAUTION
Use of controls or adjustments or performance of
procedures other than those specified herin may result
in hazardous radiation exposure.
ATTENTION
Lutillisation de commandes, réglages ou procédures
autres que ceux spécifiés peut entraîner une dangereuse
exposition aux radiations.
ADVARSEL
Usynlig
laserståling
ved
åbning,
når
sikkerhedsafbrydereer ude af funktion. Undgå udsættelse
for stråling.
This Compact Disc player is classified as a CLASS 1
LASER product.
The CLASS 1 LASER PRODUCT label is located on the
rear exterior.
This set employs laser. Therefore, be sure to follow carefully the
instructions below when servicing.
WARNING!!
WHEN SERVICING, DO NOT APPROACH THE LASER
EXIT WITH THE EYE TOO CLOSELY. IN CASE IT IS
NECESSARY TO CONFIRM LASER BEAM EMISSION.
BE SURE TO OBSERVE FROM A DISTANCE OF MORE
THAN 30cm FROM THE SURFACE OF THE OBJEC-
TIVE LENS ON THE OPTICAL PICK-UP BLOCK.
Caution: Invisible laser radiation when
open and interlocks defeated avoid
exposure to beam.
Advarsel: Usynlig laserståling ved åbning,
når sikkerhedsafbrydere er ude af funktion.
Undgå udsættelse for stråling.
VAROITUS!
Laiteen Käyttäminen muulla kuin tässä käyttöohjeessa
mainitulla tavalla saataa altistaa käyt-täjän
turvallisuusluokan 1 ylittävälle näkymättömälle
lasersäteilylle.
VARNING!
Om apparaten används på annat sätt än vad som
specificeras i denna bruksanvising, kan användaren
utsättas för osynling laserstrålning, som överskrider
gränsen för laserklass 1.
CLASS 1
LASER PRODUCT
KLASSE 1
LASER PRODUKT
LUOKAN 1
LASER LAITE
KLASS 1
LASER APPARAT
4


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DESCRIPTION
REF.NO.
KANRI
NO.
PARTNO.
KANRI
NO.
REF.NO.
DESCRIPTION
PARTNO.
ELECTRICAL MAIN PARTS LIST
5
IC
87-020-454-010
IC,DN6851
87-002-783-110
IC,CXD2500BQ
84-ZG1-669-010
C-IC,MB89627R-361
87-A20-255-040
C-IC,SN74LV373NS
87-A20-464-040
C-IC,LH5164AN-10L
87-A20-252-040
C-IC,SN74LV00NS
87-A20-253-040
C-IC,SN74LV04NS
87-A20-254-040
C-IC,SN74LV32NS
87-A20-576-040
C-IC,M51945A
87-A20-725-010
C-IC,CL484-G1
88-CL4-682-010
IC,LC866548-5J47
87-017-889-010
IC,NJM4558LD
87-A20-695-040
C-IC,UPD42426LE-60
86-NM1-621-040
C-IC,LH5317W1
87-NF8-614-010
IC,SPS-442-1-W
87-020-903-010
IC,NJM7805FA
87-A20-256-040
C-IC,PQ20VZ5U
87-017-888-080
C-IC,NJM4558MD
87-A20-372-010
C-IC,TC9409BF
87-017-726-080
IC,BU4052BCF
87-A20-715-010
IC,M62439SP
87-001-982-010
IC,TA7291S
87-017-745-010
IC,CXA1782BQ
87-A20-257-040
IC,BA6791FP
87-070-127-110
IC,LC72131D
87-A20-913-010
IC,LA1837NL
87-A20-653-010
C-IC,RL5C293
87-A20-249-040
C-IC,BU2874FV
TRANSISTOR
89-213-702-010
TR,2SB1370E
89-333-317-080
TR,2SC3331T
87-A30-196-080
TR,2SC4115SRS
89-113-187-080
TR,2SA1318TU
87-A30-198-080
TR,KTC3199GR
87-A30-197-080
TR,KTA1267GR
87-026-219-080
TR,DTA144ES
87-A30-130-010
TR,2SD2241
87-A30-128-010
TR,2SB1481
87-A30-047-080
TR,CSD655E
87-026-609-080
TR,KTA1266GR
87-026-237-080
C-TR,DTC124XK
87-026-610-080
TR,KTC3198GR
87-026-218-080
TR,DTC144ES
89-109-521-080
TR,2SA952K
89-112-965-080
TR,2SA1296GR
87-026-223-080
C-TR,DTC143TK
89-327-125-080
C-TR,2SC2712GR
87-026-239-080
C-TR,DTC114TK
87-026-235-080
C-TR,DTC114EK
89-416-643-080
C-TR,2SD1664R
89-111-625-080
C-TR,2SA1162GR
87-026-233-080
C-TR,DTA114TK
89-333-266-080
C-TR,2SC3326B
89-328-785-080
TR,2SC2878A
89-327-143-080
C-TR,2SC2714(O)
87-A30-072-080
C-TR,RT1P144C
DIODE
87-A40-393-090
DIODE,1N5402GW(F20)
87-070-274-080
DIODE,1N4003 SEM
87-A40-312-080
ZENER,DZ33M
87-A40-291-080
DIODE,1N4148(CPT)
87-A40-308-080
ZENER,DZ10M
87-027-703-080
ZENER,HZ7A1L
87-A40-538-080
C-ZENER,UDZ5.6BTE-17
87-A40-466-080
ZENER,MTZJ2.7A
87-A40-234-080
ZENER,MTZJ5.6A
MAIN C.B
C101
87-016-473-090
CAP,E 3300-35 SME
C102
87-010-197-080
CAP,CHIP 0.01 DM
C104
87-010-398-090
CAP,E 2200-35V
C105
87-012-140-080
CAP,470P
C106
87-010-408-080
CAP,ELECT 47-50V
C107
87-010-384-080
CAP,ELECT 100-25V
C108
87-010-381-080
CAP,ELECT 330-16V
C109
87-010-260-080
CAP,ELECT 47-25V
C110
87-010-260-080
CAP,ELECT 47-25V
C111
87-010-247-080
CAP,ELECT 100-50V
C112
87-010-263-080
CAP,ELECT 100-10V
C113
87-010-403-080
CAP,ELECT 3.3-50V
C114
87-010-374-080
CAP,ELECT 47-10V
C122
87-010-260-080
CAP,ELECT 47-25V
C123
87-010-260-080
CAP,ELECT 47-25V
C131
87-010-196-080
CHIP CAPACITOR,0.1-25
C132
87-010-196-080
CHIP CAPACITOR,0.1-25
C151
87-015-785-080
CHIP CAP,0.1-FZ-25Z
C200
87-010-197-080
CAP,CHIP 0.01 DM
C201
87-010-197-080
CAP,CHIP 0.01 DM
C207
87-010-546-080
CAP,ELECT 0.33-50V
C208
87-010-546-080
CAP,ELECT 0.33-50V
C209
87-010-186-080
CAP,CHIP 4700P
C210
87-010-186-080
CAP,CHIP 4700P
C211
87-010-403-080
CAP,ELECT 3.3-50V
C212
87-010-403-080
CAP,ELECT 3.3-50V
C213
87-010-260-080
CAP,ELECT 47-25V
C214
87-010-260-080
CAP,ELECT 47-25V
C219
87-010-544-080
CAP,ELECT 0.1-50V
C220
87-010-544-080
CAP,ELECT 0.1-50V
C227
87-010-260-080
CAP,ELECT 47-25V
C229
87-010-322-080
C-CAP,S 100P-50 CH
C230
87-010-322-080
C-CAP,S 100P-50 CH
C261
87-010-197-080
CAP,CHIP 0.01 DM
C273
87-010-196-080
CHIP CAPACITOR,0.1-25
C303
87-010-177-080
C-CAP,S 820P-50 SL
C304
87-010-177-080
C-CAP,S 820P-50 SL
C307
87-010-263-080
CAP,ELECT 100-10V
C308
87-010-263-080
CAP,ELECT 100-10V
C311
87-010-195-080
C-CAP,S 0.068-25 F
C312
87-010-195-080
C-CAP,S 0.068-25 F
C313
87-010-184-080
CHIP CAPACITOR,3300P(K)
C314
87-010-184-080
CHIP CAPACITOR,3300P(K)
C315
87-010-374-080
CAP,ELECT 47-10V
C317
87-010-546-080
CAP,ELECT 0.33-50V
C318
87-010-546-080
CAP,ELECT 0.33-50V
C320
87-010-404-080
CAP,ELECT 4.7-50V
C321
87-010-405-080
CAP,ELECT 10-50V
C322
87-010-408-080
CAP,ELECT 47-50V
C340
87-010-322-080
C-CAP,S 100P-50 CH
C361
87-010-374-080
CAP,ELECT 47-10V
C362
87-010-401-080
CAP,ELECT 1-50V
C393
87-010-178-080
CHIP CAP,1000P
C394
87-010-178-080
CHIP CAP,1000P
C401
87-010-401-080
CAP,ELECT 1-50V
C402
87-010-401-080
CAP,ELECT 1-50V
C403
87-010-321-080
CHIP CAPACITOR,82P(J)
C404
87-010-321-080
CHIP CAPACITOR,82P(J)
C405
87-010-188-080
CAP,CHIP 6800P
C406
87-010-188-080
CAP,CHIP 6800P
C407
87-010-426-080
C-CAP,S 0.012-25 B
C408
87-010-426-080
C-CAP,S 0.012-25 B
C451
87-010-198-080
CAP,CHIP 0.022
C452
87-010-382-080
CAP,ELECT 22-25V
C453
87-010-183-080
C-CAP,S 2700P-50 B