Kenwood R-V251 User manual

AV SURROUND RECEIVER
R-V251
SERVICE MANUAL
© 1999-8/B51-5562-00 (K/K) 1792
70%
Caution : No connection of ground line if disassemble the unit.
Please connect the ground line on rear panel, PCBs, Chassis and some
others.
* Refer to parts list on page 25
ON/STANDBY
PHONES
INPUT TAPE 2
(MONITOR)
TA/NEWS
/INFO. DISP. AUTO A.MEMO BANDPTY
CLOCK MODE
TIMER
SET
TUNING
MODE MULTI CONTROL
LEVEL
VOLUME CONTROL
DOWN UP
AV SURROUND RECEIVER R-V251
R D S
EON
SYSTEM
CONTROL
FRONT
SURROUND
CENTER
SUB WOOFER
SUB WOOFER
PRE OUT
REAR FRONTCENTER
SPEAKERS
( 6-16Ω )
UNSWITCHED TOTAL
150W MAX.
AC 230V 50Hz
ANTENNA
AM
FM 75Ω
GND
TAPE 2
(MONITOR) TAPE1 / MD
CD AUX
IN
REC VCR PLAY
REC PLAY REC PLAY
R
L
L
AUDIO
VIDEO
VCR
REC OUT
MONITOR
OUT DVD
VCR
PLAY IN
L
R
RLC
1 3
10
15 17 19
12
11
2IN 4
9 5 7
5 7
DVD 6CH./2CH.INPUT
R
16 18 20
22
43
3133393735
34 3236 38 40
Panel dressing
(A21-3777-03) Window (B10-2367-02) Panel * (A60-)
Knob
(k29-6727-04)
Button(R) *
(K29-)
Button(L)
(K29-6816-02)
Phono jack(4P)
(E63-0186-08) Phono jack(6P)x2
(E63-0187-08)
Lock terminal board
(E70-0120-08)
Phono jack
(E63-1137-08) Phono jack(6P) (E63-1136-08) AC outlet *
(E03-)
Lock terminal board
(E70-0119-08) Power cord bushing (J42-0346-08)
Metallic cabinet
(A01-3750-08)
Lock terminal board
(E21-0034-08) Phono jack(4P) (E63-1152-08) Phone jack (E11-0188-05)
AC power cord *
(E30-)

R-V251
2
CONTENTS / ACCESSORIES / CAUTIONS
Contents
CONTENTS / ACCESSORIES / CAUTIONS............. 2
BLOCK DIAGRAM......................................................3
CIRCUIT DESCRIPTION............................................4
ADJUSTMENT............................................................8
PC BOARD ................................................................ 9
SCHEMATIC DIAGRAM.......................................... 13
EXPLODED VIEW ....................................................24
PARTS LIST..............................................................25
SPECIFICATIONS....................................................31
FM indoor antenna (1)
(T90-0830-08) AM loop antenna (1) (T90-0804-08)
Remote control unit (1)
(A70-1306-05): RC-S0506...TE
(A70-1305-05): RC-S0505...X Battery cover (A09-0378-08)
Loop antenna stand (1) Batteries(R6/AA)
REMOTE CONTROL UNIT
RC-S0506
A B
+10
54321
09876
6
7
8
8
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1
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3
7
7
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2
2
1
ALL INFO.TEXT DISP.
TITLE
SEARCH
MEMO
TUNER
BAND
e
STILL STEP
E
A.MONI.
AUTO
MEMORY
RDS
DISPLAY
PTY
SEARCH
DISPLAY
SLEEP
NEXTPREV.
POWER
TIME
CLEAR
P.MODE
CHECK
STEREO
MUTE
SOURCE
DIRECTDSP
LEVEL VOLUME
PRO LOGIC 3 STEREO
MULTI
CONTROL
TEST
TONE
MODE
INPUT TAPE 2
(MONITOR)
FREEZE
PAL/NTSC
RETURN
TAPE
MD/LO
SELECT
P.B.C.
¶REC/ARMO.T.E.
LD
AUTO DIGITAL
CD/VIDEO CD/LD REPEAT
FRAME/
TIME
PTY
TA/NEWS/INFO.
DISC SKIPEDIT MODE
ALL TEXT
SEARCH
P.CALL
fi %
How to reset the microcomputer
The microcomputer may malfunction (impossibility of operation,
erroneous display, etc.) when the power cord is unplugged and
plugged in again while the unit is in ON mode with the key
pressed or due to other external causes. In this case, execute the
procedure on the right to reset the microcomputer and return the
unit to the normal condition.
Unplug the power cord from the wall outlet.
While holding the (ON/STANDBY) key depressed,
plug the power cord into the wall outlet again.
Resetting the microcomputer clears the memory you entered and
returns it to the initial condition when the unit left the factory.
Accessories
Cautions

FL DISPLAY
TUNER UNIT
K01
POWER AMP
K02
K03
K02
BD101
7815
+VH(AMP)
-30V
AVR
KEY MATRIX
STK411-210E
IC103
STK410-010E
IC104
Q119-124Q113-118
NJM2068D
IC113
HEADPHONES
L
R
L
R
SPEAKER
C
SL
SR
SW-PRE OUT
M62446FP
IC107
ELECTRIC TONE
/VOLUME
BD102
IC101
7915
IC102
Q101
-VH(AMP)
+VL(AMP)
-VL(AMP)
F1
FILAMENTAC
FL DISPLAY
+5V(u-COM)
+10V(PRO LOGIC)
+5V(VIDEO SEL)
+7V(E.VOL)
+15V
-15V
-5V(VIDEO SEL)
-7V(E.VOL) F2
IC106(2/2)
TC9163AN
IC111
NJM2068D
IC112
NJM2068D
IC105
CDX271AQ
IC110
NJM2068D
IC702(2/2)
NJM2068D
IC603
-6ab ATT
IC702(1/2)
LC7821
IC601
LC7821
IC106(1/2)
DOLBY
PROLOGIC
IC108
NJM2279
SELECTOR
VIDEO
TUNER
CD
AUX
MD PLAY
PLAY
TAPE/MONITOR
VIDEO PLAY
TAPE/MONITOR
REC
MD REC
VIDEO REC
VIDEO PLAY
VIDEO REC
DVD/GCH INPUT
MONITOR OUT
L
R
C
SL
SR
SW
DVD
GCH INPUT
IC701
u-COM
FLT701
+
+
+
+
+
+
+
MUTE
L
R
C
SL
SR
SW
C
R
L
SW
SR
SL
-10ab ATT
-B LOW TAP
-B HI TAP
+B LOW TAP
+B HI TAP
L
R
C
S
L
RR
GRID
REMOCON IN ROTARY ENCODER RELAY VIDEO1,VIDEO2,VMUTE E.VOL (DATA,CLK,STB) 10ab ATT MUTE TUNER RESET P/L (DATA,CLK,STB) SYNCHRD RDS PROTECTION
SEGMENT
KEY SCAN
KEY RETURN
R-V251
R-V251
3
BLOCK DIAGRAM

R-V251
4
CIRCUIT DESCRIPTION
Active
Pin. No. Pin Name I/O Description HL
1,2 G1,G2 O FL grid control.
3 PULL UP - Connected to VCC(+5.0V).
4 POWER DOWN I AC selector.
5 VOL. UP I Volume encoder A(CW) signal.
6 RDS CLK I RDS IC(IC703) clock input control.
7 VOL. DOWN I Volume encoder B(CCW) signal.
8 RMC I Remote control signal input.
9 RDS DATA I RDS IC(IC703) data input control.
10,11 NC - Unused.
12 PROTECTION I Detection input port of protection. ON
13 STEREO I Detection input port of stereo signal for TUNER. STEREO
14 PLL CE O PLL IC(IC402) CE signal output.
15 RCVR CLK O SEL. IC(IC601,602,106) clock signal output.
16 RCVR DATA O SEL. IC(IC601,602,106) data signal output.
17~19 KEY3~1 I Key return 3~1.
20 S. DATA I/O Serial communication data.
21 S. BUSY I/O Serial communication busy.
22 E.VOL CK O E.volume IC(IC107) clock control. ACTIVE
23 E.VOL DT O E.volume IC(IC107) data control.
24 E.VOL ST O E.volume IC(IC107) strobe control. ACTIVE
25 PLL DO I PLL IC(IC402) DO signal.
26 RCV CE I Receiver chip enable signal. ENABLE
27 DSP CE O DSP IC(IC105) XLAT.
28 AVREF - Analog power supply(+5.0V).
29 H/P DETECT I Detection input port of headphones jack.
30 SD I Detection input port of SD signal for TUNER. TUNED
31 S. LEVEL I A/D input port of signal level.
32 DSP READY O DSP IC(IC105) ready.
33 DSP DATA O DSP IC(IC105) data.
34 DSP CLK O DSP IC(IC105) clock.
35 OPT I Discrimination port of model. E,T X
36 CH.SPACE - Unused.
37 AVSS - Analog ground.
38 RESET I u-COM reset.
39 EXTAL I Main clock(10MHz).
40 XTAL - Main clock(10MHz).
41 VSS - u-COM ground.
42 TX - Sub clock(32.768kHz).
43 TEX I Sub clock(32.768kHz).
44 VDD - Power supply(+5.0V).
45 VFDP - FL power supply(-33V).
46 T. MUTE O Muting control of TUNER. ON
47 MAIN MUTE O Muting control of main output. ON
48 H/P MUTE O Muting control of headphones. ON
49 VCR MUTE O VIDEO IC(IC108) control. ON
50 DSP RESET O DSP IC(IC105) reset.
51 RCV. CE I Receiver chip enable signal.
52 - - Unused.
53 F. RLY O Front speaker relay control. ON
54 S. RLY O Surround speaker relay control. ON
55 C. RLY O Center speaker relay control. ON
1. Microprocessor : (FRONT PCB,IC701)
1-1. Pin description

Pin No. Name I/O Description
1~3 T.P O Test monitor. Normally outputs Low.(Unused.)
4 VSSO - Digital GND.
5~8 T.P O Test monitor. Normally outputs Low.(Unused.)
9 TSTO I Digital GND.
10 VDDO - Digital power supply.
11 VSS1 - Digital GND.
12~15 TST1~4 I Digital GND.
16 XRST I System reset input. Reset when Low.
17 BFOT O Unused.
18 CSL1 I Digital power supply.
19 CSL2 I Digital GND.
20 VSS2 - Digital GND.
21 AVS3 - L-ch DA converter GND.
22 AVD3 - L-ch DA converter power supply.
23 LOUT O L-ch DA converter output.
24 AVD1 - L-ch AD converter power supply.
25 AVS1 - L-ch AD converter GND.
26 L01 O L-ch AD converter LPF operational amplifier inverted output.
27 LIN I L-ch AD converter analog input.
28 AVD5 - C-ch DA converter power supply.
29 AVS5 - C-ch DA converter GND.
30 XCOUT O C-ch DA converter output.
31 AVDX - Analog power supply for master clock.
32 XTLO O Crystal oscillator circuit output.
33 XTL1 I Crystal oscillator circuit input.
34 AVSX - Analog GND for master clock.
35 XSOUT O S-ch DA converter output.
36 AVS6 - S-ch DA converter GND.
37 AVD6 - S-ch DA converter power supply.
38 RIN I R-ch AD converter analog input.
39 LO2 O R-ch AD converter LPF operational amplifier inverted output.
40 AVS2 - R-ch AD converter GND.
R-V251
5
CIRCUIT DESCRIPTION
Active
Pin. No. Pin Name I/O Description HL
56 POWER RLY O Power relay control. ON
57 10dB. ATT O Volume 10dB attenuator control. ON
58 ST. LED O STANDBY LED control(RED). ON
59 ST. LED O STANDBY LED control(GREEN). ON
60~69 - - Unused.
70~77 9S~16S O FL segment(9~16) and key scan(1~8) control.
78~85 1S~8S O FL segment(1~8) control.
86~88 - - Unused.
89 VDD - u-COM power supply(+5.0V).
90,91 - - Unused.
92~100 G11~G03 O FL grid control.
2. Key matrix
3. Pin description of dolby prologic IC(MAIN PCB IC105)
KS1(77pin) KS2(76pin) KS3(75pin) KS4(74pin) KS5(73pin) KS6(72pin) KS7(71pin) KS8(70pin)
K1(19pin) MODE TUNING - - - - PTY AUTO
TIMER TIMER TIMER
K2(18pin) MULTI TUNING CLOCK - MODE SET TA MEMO
K3(17pin) MULTI - INPUT
ON/STBY INPUT TAPE2 DISP BAND

R-V251
6
CIRCUIT DESCRIPTION
Pin No. Name I/O Description
41 AVD2 - R-ch AD converter power supply.
42 ROUT O R-ch DA converter output.
43 AVD4 - R-ch DA converter power supply.
44 AVS4 - R-ch DA converter GND.
45 VSS3 - Digital GND.
46 SCK I Shift clock input for microcomputer interface.
47 REDY O Transfer enabling signal output for microcomputer interface.
Transfer prohibited when Low.
48 T.P O Unused.
49 XLAT I Latch input for microcomputer interface.
50 RVDT I Data input for microcomputer interface.
51 XS24 I Serial data 24-/32bit slot selection.
24-bit slot when Low.(valid for slave mode)
52 VDD1 - Digital power supply.
53 VSS4 - Digital GND.
54 T.P O Unused.
55 SI I GND.
56 T.P I GND.
57 BCK I/O Unused.
58 LRCK I/O Unused.
59 VSS5 - Digital GND.
60 XMST I Digital GND.
61~63 T.P O Unused.
64 VSS6 - Digital GND.
65~72 T.P O Unused.
73 VDD2 - Digital power supply.
74 VSS7 - Digital GND.
75~80 T.P O Unused.

IC CHANNEL Lch Rch Lch Rch Lch Rch Lch Rch Lch Rch Lch Rch Lch Rch Lch Rch
IC PORT 2 27 3 26 4 25 6 23 7 22 8 21 10 19 11 18
SURROUND --- prologic stereo 6ch input prologic prologic 6ch input prologic
SPEAKER FLch FRch FLch FRch FLch FRch SLch SRch SLch SRch SLch SRch Cch SWch Cch SWch
DOLBY PROLOGIC --- XX XX
DOLBY 3STEREO --- X XXXX
DSP LOGIC --- XXX XX
STEREO --- XXXXXX
SOURCE DIRECT --- X X XXXXX
6ch INPUT(6ch) --- XXX XX
6ch INPUT(2ch) --- XXXXXXX
IC CHANNEL Rch ch Rch ch Rch ch Rch ch Rch ch Rch ch Rch ch Rch ch
IC PORT 1 30 2 29 3 28 4 27 6 25 7 24 9 22 10 21
INPUT SELECTOR --- VCR REC TAPE1/MD REC --- MONITOR TAPE2 PLAY --- ATT
CD --- --- X---
AUX --- --- X---
VCR --- X--- X---
TAPE1/MD --- X--- X---
MONITOR ON --- --- X--- X
TUNER --- --- X---
DVD/6ch INPUT --- --- X---
7
CIRCUIT DESCRIPTION
R-V251
4. Function table
4-1. Mode selector: KIC9163AN(IC106)
4-2. MODE/ATT selector IC: LC7821(IC602)
5. Test mode
Setting : While pressing the < INPUT key,plug the AC power cord into the AC wall outlet.
All the fluorescent display indicates.
(The all-illuminated state is cleared by pressing any main unit keys.)
Cancelling: Plug the AC power cord out from the AC wall outlet.
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(B)
FM-SG
FM-SG
AM-SG
MPX
AG
AG
AG
(A)
(D)
(C)
AC voltmeter Oscilloscope Distortion meter
Dummy antenna
INPUT PCB
IC601
PIN 30 (Lch)
PIN 1 (Rch)
8
ADJUSTMENT
R-V251
No.
1
ITEM
DISCRIMINATOR
INPUT SETTING
(A)
CARRIER FREQ. : 98.0MHz
MOD FREQ. : 1kHz
DEVIATION : ±75kHz
SELECTOR : MONO
ANT INPUT LEVEL : 60dBu
OUTPUT
SETTING
Connect a
DC
voltmeter to
TP401
TUNER
SETTING
MONO
98.0MHz
ALIGNMENT
POINTS
T402
ALIGN FOR
0V±50mV
FIG.
3TUNED LEVEL
(A)
CARRIER FREQ. : 98.0MHz
MOD FREQ. : 1kHz
DEVIATION : ±75kHz
SELECTOR : MONO
ANT INPUT LEVEL :
30dBu±5dB
-MONO
98.0MHz VR401
Adjust
VR401 and
stop at the
point where
(TUNED)
goes ON.
2DISTORTION
(STEREO)
(A)
CARRIER FREQ. : 98MHz
MOD FREQ. : 1kHz
DEVIATION : ±67.5kHz
PILOT : ±7.5kHz
SELECTOR : L or R
ANT INPUT LEVEL : 60dBu
(B) AUTO
98.0MHz T403 Minimum
distortion.
FM SECTION BAND : FM
Tuner adjustment
AM SECTION BAND : AM
1TUNED LEVEL
(D)
CARRIER FREQ. : 999kHz
MOD FREQ. : 1kHz
30%DEV
SELECTOR : MONO
ANT INPUT LEVEL :
30dBu±5dB
-999kHz VR402
Adjust
VR402 and
stop at the
point where
(TUNED)
goes ON.
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C231
C232
C235
R263
R264
R236
R279
R276
R233
R244
C250
C249
C206
C205
C247
R232
R235
R231
R04
R288
C55
C54
R56
R54
R53
R50
R40
R44
C194
C246
R222
R220
R202
R76
C243
C244
C150
C160
C138
C139
C143
C64
R94
R13
C11
C12
C10
C09
R46
R08
R59
R72
R29
R31
R47
C42
C41
C133
R148
C65 C66
R127
R144
C124 C122
R142 R146
R137
R130
R118
R102
C67
C68
R147
C111
R125 R103
C131
C135
R145 R
C45C46
C123 C121
R143
C130
R91
R105
C105
R107
R109
R111
C107
C50
R254
R35
R192
R174
R173
R175
R196
R190
R201
R221
R219
R37
R195
R217
R215
R24 R23
R09 R10
R26 R25
R22 R21
C04
R216
C223
C226 C224
R285
C233
C229
C230
C234
C225
R277
R280
R208
C227
C207
J78
J77J76
J75
J74
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R06
R05 R03 R136 C53
J71
J70
J73
R133
R83
C05
C193
C245 R256 R255
R253
R281
R77
C70
R81
R168
R166
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C148
C149
R163
C141
C108
R110
R112R108
C106
R106
R12
C44
C295
R58
C33
C34
R62
R61
C36
C37
C241 R32
R287
C296
R92
R128
R104
C144
R140
J65
J64
J63
J62
J67
J66
J68
J60
J61
J79
C128
C132
R93
R139
C63
C112
R124
C119
R149
R126
C114
C120
R150
C113
R117
R123
R167
R164
R80
R86
R79
R85
R78
R82
R170
R169
C170
C168
C167
C169
C159
R282
C222
C182
R178
R189
R213
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R177
C186
R181
C182
C185
R179
C183
R180
C184
R186
R185
R187
R205
R134
R135
R20
C137
R203
R204
R188
C221
C228
R283
R265
R266
R273
1
21
22 42
1
85
4
1
180
65
64
41 40
25
24
4
5
8
14
5
814
5
8
D10
D09
D151
D08
D201
D202
D20
IC107
IC113
IC110
IC105
IC112
IC111
J162 J102
J103
J108
J104
J29
J26
J17
J18
J27
J28
J30
J34
J15
J14
J12
J251
J252
J244
J250 J245
J246
J247
J242
J241
J33
J35
J107
J109
J110
J111
J49
J50
J48
J47
J46J45
J43
J219
J82
J81
J218
J215
J200
J214 J83
J42
J41
J44
J112
J113
J114
J116 J115
J129
J150
J152
J149
J151
J153 J154
J155 J156 J157 J158
J166 J167 J168
J164
J165
J170
J176
J174 J175
J177
J223 J222
J202
J199
J198 J197
J196
J195
J194
J193
J188
J192
J186
J185
J187 J184
J183 J182
J178
J190 J189
J224
J212
J211 J210
J209
J128
J118
K01
K02
J132
J138
J133
J234
J146
J233
J239
J135
J136
J137
J134
J140
J143
J139
J143
J208
J207
J204 J216
J206 J203
J232
J231
J230
J213
J240
J191
14 1
28
15
J142 J144
J169
J163
J171
J117
J101
J106
J54
J53
J52
J51
J40 J39 J38
J37
J36
J21
J19
J227
J229
J221
J226
J225
J238
J20
J25 J57
J16
J263 J262 J261
J260
J259
J10
J263 J254 J255 J256
J257
J258
J31
J32
J22
J243
J24
J23
J55
J120
J145
J160 J161
J235
J119
J131
J121
J122
J123
J130
J56
J105
J127 J147 J124
J125
J126
C210 C216 C215 C209 C214
C26 C27
C195
C197C198
C196
C187
C176
C188
C48
C49
C47
C175
C178
C177
C179
C180 C174
C173
C172
C171
C157
C140
C127
C103 C101
C102
C118
C126
C125
C104
C43
R69
C21
C22
C20
C19
C18
C17
C129
X101
C61
C134
C62
C31
C32
C56
C251
C52
C189
C190
C191
C109
C110
C117
C158 C163
C164
C166
C161
C165
C162
C28
C208
C13
C14
C240
C220
C236
C238
C237
R248
R247
R271
R262 R261
C218
C211
R240
C40
114
78
C39
C24
C23
C25
C38 C35
C07
C08
C06
R237
R213
R239
R238
R200
R132
R55
R225
R252 R251
R74
R75
R199
R197
R198
R226
C199
C30
C29
C202 R36
R270
R269
R278
R119
R19
R138
R120
R121
C115
R113
R116
R101
R292
R88
R33
R286
JK104
JK101
JK102
R11 R98
R97
R65
R64
R67
R45
R151
R152
R155
R295
R296
R156
R159
R160
CNT101
JK103
C151
R60
R63
C152
C153
C154
C155
C156
R66
C239
K03
SPK101
SPK102 R275
L101
L102 L103
L105
L104
C212
R210
R246
R209
R243
R245
R211
C51
R57
R52
C293
R194
R218
R48
R90
R73
R72 R71
R89
R141
R114
IGO
R115
C116
R122
J220
R129
R131
C147
R49
R51
R18
R193
C201 C203
R34
R42
C204
R84
R38
R207
R229
R208
C200
R224
R223
R184
R39
R176
R183
R171 R172
C69
R214
R249
R230
R43 R41
R242 R241
C58 C59
C217
C219
R268
R258
R274
R260
R259
R257
R250
R07
R95
R28
R30
R87
R02
R96
I
I
G
G
OO
R01
R17
R154 R153
R158 R157
R162 R161
R267
EE
BB
E
B
E
B
E
B
E
B
E
B
E
E
B
E
B
E
1
12
1
1
1
2
8
14
3
B
B
EB
EB
E
B
126 122
E
B
EB
EB
EE
E
B
B
EB
EB
EB
EB
B
E
B
E
B
E
E
BBEB
E
B
E
B
E
B
E
E
B
B
31
30
1
2
EB
ZD102
ZD21
ZD101
ZD22
ZD12 ZD11
CN110
ZD23
ZD202 ZD201 ZD203
ZD19
ZD20
ZD204
IC104 IC103
D23
D22
IC102
IC101
D04
CN601
D02
D03
IC106
D01
Q215
Q151
Q211 Q120
Q217
Q218
Q207ZD10
Q221
Q219
CN105
Q220
BD101
BD102
CN103
CN101 IC109
CN102 CN701
Q209
IC108
Q208
Q124
Q123
Q121
Q119
Q114 Q120
Q113
Q111
Q110
Q122
Q203
Q201
Q204
Q205
Q118
Q117
Q115
Q116
Q101
Q214 Q213
Q202
Q206
PHONES
R
MAIN UNIT
L
REAR
SPEAKERS
R
PRE OUTREC OUT
OUTDVD
R
MONITOR
VCR
PLAY IN
FRONT
L
VIDEO
SURROUND
SUBWOOFER
CONTROL
SYSTEM
CENTER
SUBWOOFER
C
L
FRONT CENTER
ABDFHJCEGI
2
1
3
5
7
4
6
Refer to the schematic diagram for the value of resistors and capacitors.
PC BOARD (Component side view)
109

R705
J784
J786
J785
J783
R706
R739
R735
R731
C708 R720 R719 R715
R768
R771
C723
R714
R713
R769
R711 J781
J782
R710
R708 R709
J787 J788
R751
R750
R749
R732
C713
R740
C454 R446
R447
C456
R431
C428
C427
C424
C403
R404
C406 C419 R424
R421
E
E
B
E
E
E
E
B
B
B
B
B
R417
C415
C410
R403
C420
R413
C472
C409
R411R408
R414
R407
R428
C416
R422
R452
C461
R453
R458
R437
R465
R439
C617
R642
R648
R641
R635
R632R631
R628R627R624
R623
R620R619R616R615
R612
R611R608
R607
R604
R603
C623
R636
J691
R436
C476
C453
R429
J430
C435
C434
C433
C432
R725
C715
R736
R734
C707 C704
C705
R762
R729 R729
R727
R721 R722
R774
R772
R770
C725
C721
R746
R748
R747 R745
C701
C720
C719
R724
R723
R738
C712
R427
R445
R449
R469
R438
R470
R633
R634
C621
C620
C619
C622
R643
R644
R638
C631 R639C635
R640 C636
C632
R637
R645R646R647
J426
J428
R460
R442
R430
C430
C423
C422
R402 C404
R405
R416
C418
R601
R606
R605
R602
R609 R610 R613 R614
R618 R621 R617 R622 R625 R626 R629 R630
C601 C602
C604 C605 C606 C607 C608
C610 C611 C609 C612 C613 C614 C615 C616
C603
C414
R418
R425
C457
R464
C452
R461 R451
C450
R415
C412
R409
R401
C417
R448
R454
R455
R761 R760
1
1
100
10
20
11
80 81
51
50
30
31
D722 D720 D721 D719 D718
D717
D713
D402
D601
D602
D401
D405
D404
Q407
Q408
Q402
Q401
Q405 Q406
D709
D710 D714
D707
D706
D703
D705
D701
D702
IC701
IC703
J737
J746
J745
J744
J743
J742 J741 J740 J739 J738
J748
J747
J732
J730
O
G
I
J731
J729 J727 J718
J719
J712
J713 J705
J702
J763
J762 J701
FLT701
J710
J643
J649
J653
J641
J642
J607
J622
J602
J651
J648
J711
J704
J703
J723
J724
J726
J720
J721
J722
J717
J749
J764
J709
J635
J534
J633
J625
J624
J623
J626
J644
J621
J611
J609
J610
J608
J606 J605
J604
J603
J601
J620
J619
J618
J617 J613 J615
J614 J630
J629
J628
J613
J612
J637
J638
J410
J412
J414
J404
J409
J434
J639
J408
J411
T401
J435
J407
J432
J425
J647
J708
J715
J714
J716
J707
J706
J725
J728
J734
C710
J733
J736
J735
J751 J759
J755
J758
J420
J421
VR401
J422
J423
J433
J406
J405
J419
J417 J415
J416
J431
J759
J760
J761
J752
J753
TA/NEWS/INFO
J754
SW722
C717
R765 X702
R764
R763
R712
R716
R702
R718
R717
R726 R725
R737
2
130
111
1
11
31
R730
R707
R741
J652
C618
C625
C637
C638 R649
R773
R744
R743
C703
C702
R704
R703
R701
R742
R753
R754
R759
C716
RMC701
C425
C421
C426
C431
C438
C440
C441
C460
C407 C405
C455
C360 C634 C629 C633
C624
C458
C469
C470
C471
C451
C448
C447
C449
C446
VR402
T402 T403
C709 C722
X703
C724
C706
C714
C711
X701
C439
R757
R758 R756
LED701
R755
R463
R444
C413
X401
R423
R435 R434
T406
T405
R426
R458
R419
R406
C475 C474
C402
R456
C401
R457
CF402
CF401
L401 L403
L402
L601
C718
11
1
11
1
11
55 1
1
E
B
E
B
E
B
E
B
E
B
E
B
E
B
30 1
14
FE401
ANT401
58
16
1
11
1
1
111
12
8
54
30
30
15 15
16 16
11
12
22
15
MODE
BAND
AUTO A.MEMO
CONTROL
MULTI
TUNING
DISP
PTY
VOLUME
CONTROL
SET MODE
TIMER
CLOCK
TAPE 2 INPUT
ON/STANDBY
(MONITOR)
ZD403
ZD402
ZD401
IC402
D406
IC601
JACK603
JACK601
IJACK602
CNT601
IC602
IC603
D716
D711
D712
D708
CNT702
NONE RDS : DELETE CN702
ZD701
IC702
D704
Q409
D715
CNT701
Q706 Q704
Q705
CN703
CN704
IC401
CNT703
Q703
Q701
CNT704
Q702
SW715
VOLUME UNIT
SENSOR UNIT
TUNER UNIT
FRONT UNIT
SW714
SW721
SW716
SW713
SW728
SW717
SW712
SW719
SW718
SW711
SW701
SW704
FM
AM
CD
IN AUX REC
VCR TAPE2
(MONITOR)
PLAY REC PLAY
TAPE/
MD
REC PLAY
IN
ANTENNA
SW702SW703
SW705
SW706
SW707
KMOQSLNPRT
2
1
3
5
7
4
6
Refer to the schematic diagram for the value of resistors and capacitors.
• Power supply PCB illust, is not printed to keep the delivery( and simple
circuit) of service manual.
PC BOARD (Component side view)
11 12