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PWR
OFF
TI
LOUD
VOL ADJ
MENU
DISP
NAME.S
SCANB NR B.S/RDM REP
D.SCN
MTL/M.RDM
DISC
DISC
PROG/PTY
DAB
EJECT
AUD
KRC-678R
45W 4
X
KRC-608
KRC-678R/RY/RV/RYV
CASSETTE RECEIVER
SERVICE MANUAL
C
2000-3 PRINTED IN KOREA
B51-7597-00 ( K ) 3117
EJECT
PWR
OFF
LOUD
MENU
AUTO
AME
DISP
NAME.S
SCANB NR B.S/RDM REP
D.SCN
MTL/M.RDM
DISC
DISC
DAB
AUD
KRC-608
45W 4
X
PROG
Front glass assy
(B10-3204-08)
Escutcheon assy
(B07-2195-08)
Panel assy
(A64-2087-08)
Lever
(D10-4514-08)
Mounting hardware assy
(J21-9585-08)
DC cord assy
(E30-4860-08)
: KRC-608 only
Plastic cabinet assy
(A02-1494-08)
The CASSETTE MECHANISM OPERATION DESCRIPTION is the same model D40-1122-05.
Please refer to the service manual for model D40-1122-05(B51-7452-00).
Stay
(J54-0611-08)
: KRC-608 only
Escutcheon
(B07-2186-08)
: KRC-608 only
Screw set
(N99-1689-08)
: KRC-608 only
Screw set
(N99-1688-08)
KRC-678R
KRC-608
Panel assy
(A64-2088-08)
Front glass assy
(B10-3205-08)
Escutcheon assy
(B07-2195-08)
DC cord assy
(E30-4861-08)
: KRC-678R/RY
/RV/RYV
ANT adapter
(T90-0523-05)
: KRC-678R/RY
/RV/RYV
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KRC-608,678R/RY/RV/RYV
MICROCOMPUTER'S TERMINAL DESCRIPTION
784217AGF503(504)(IC1 : MAIN UNIT)
Pin Pin Name Signal Name I/O Purpose Operation Description
1 P60/A16 ST_TYPE1 I E-VOL setting selection input DEFAULT:LO
2 P61/A17 ST_TYPE2 I E-VOL setting selection input DEFAULT:LO
3 P62/A18 JS_TYPE1 I
4 P63/A19 TYPE1 I Destination type switching input 1
5 P64/RD TYPE2 I Destination type switching input 2
6 P65/WR TYPE3 I Destination type switching input 3
7 P66/WAIT NC O Not used
8 P67/ASTB NC O Not used
9 Vdd - Positive power supply pin
10 P100/TI5/TO5 AMP_SVR O Power IC reset control Power ON: Lo.
11 P101/TI6/TO6 AMP_STBY O Power IC standby control
12 P102/TI7/TO7 AMP_MUTE O Power IC muting control Muting ON: Lo. Muting OFF: Hi.
13 P103/TI8/TO8 NC O Not used
14 P30/TO0 ACC_DET I Acc detection input ACC OFF:HI ACC ON:LO
15 P31/TO1 BU_DET I B-U detection input B-U down: Hi. B-U normal: Lo.
16 P32/TO2 SMALL I Small input Dimmer ON: Lo. Dimmer OFF: Hi.
17 P33/TI1 P_CONT O Power control ON:HI OFF:LO
18 P34/TI2 P_ANT O Power antenna control TUNER: Hi. Other sources: Lo.
19 P35/TI00 REMO I Remote control input
20 P36/TI01 P_ON O Internal power control ON:HI OFF:LO
21 P37 ILL_ON O LED lighting control output Lighting ON: Hi. Lighting OFF: Lo.
22 TEST - IC test pin
23 P90 IC2_SDA I/O E-VOL/E's + data input/output
24 P91 IC2_SCK O E-VOL/E' + clock output
25 P92 MUTE O Muting control Muting ON: Hi. Muting OFF: Lo.
26 P93 SW5V O SW 5 V control ON:LO OFF:HI
27 P94 F/E_DATA I/O IC3 data input/output
28 P95 F/E CLK O IC 3 clock output
29 P120/RTP0 CH_CON O CH control ON:HI
30 P121/RTP1 CH_REQH O CH send request output Requested: Lo.
31 P122/RTP2 NC O Not used
32 P123/RTP3 NC O Not used
33 P124/RTP4 C-MAIN_M O C-mechanism main motor control ON:HI OFF:LO
34 P125/RTP5 C-SUB_M+ O C-mechanism loading motor control
35 P126/RTP6 C-SUB_M- O C-mechanism loading motor control
36 P127/RTP7 NC O Not used
37 Vdd - Positive power supply pin
38 X2 - Main system clock oscillator pin
39 X1 - Main system clock oscillator pin
40 Vss - GND pin
41 XT2 - Sub-system clock oscillator pin
42 XT1 - Sub-system clock oscillator pin
43 RESET I System reset input pin
44 P00/INTP0 NC O Not used
45 P01/INTP1 RDS_CLK I RDS clock input
46 P02/INTP2/NMI CH_REQC I CD-CH send request input Requested: Lo.
47 P03/INTP3 LCD_DATAL I Data input from LCD driver
48 P04/INTP4 C-MODE_1 I C-mechanism mode detection 1 input
49 P05/INTP5 C-MODE_2 I C-mechanism mode detection 1 input
50 P06/INTP6 C-MODE_3 I C-mechanism mode detection 1 input
Genuine/generally-marketed identification
input.
DEFAULT:LO
Standby canceled: Hi.
Standby mode: Lo.
3
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KRC-608,678R/RY/RV/RYV
MICROCOMPUTER'S TERMINAL DESCRIPTION
784217AGF503(504)(IC1 : MAIN UNIT)
Pin Pin Name Signal Name I/O Purpose Operation Description
51 AVdd - A/D analog power pin
52 AVref0 - A/D reference voltage input pin
53 P10/ANI0 PHONE I PHONE detection input
54 P11/ANI1 NC I Not used
55 P12/ANI2 NOISE I FM noise detection input
56 P13/ANI3 S-METER I FM S-meter input
57 P14/ANI4 NC I Not used
58 P15/ANI5 NC I Not used
59 P16/ANI6 REEL_S I C-mechanism supply reel detection
60 P17/ANI7 REEL_T I C-mechanism take-up reel detection
61 AVss - A/D and D/A GND pin
62 P130/ANO0 NC O Not used
63 P131/ANO1 NC O Not used
64 AVref1 - D/A reference voltage input pin
65 P70/RxD2/SI2 CH_DATAC I Data input from CD-CH
66 P71/TxD2/SO2 CH-DATAH O Data output to CD-CH
67 P72/ASCK2/SCK2 CH_CLK I/O CD-CH clock input/output
68 P20/RxD1/SI1 LCD_DATAL I Data input to LCD driver
69 P21/TxD1/SO1 LCD_DATAS O Data output from LCD driver
70 P22/ASCK1/SCK1 LCD_CLK O Clock output to LCD driver
71 P23/PCL NC O Not used
72 P24/BUZ BEEP O Beep output
73 P25/SI0 NC O Not used
74 P26/SO0 PNL_DET1 I Panel detection
75 P27/SCK0 NC O Not used
76 P80/A0 LCD_INH O Reset output to LCD driver
77 P81/A1 LCD_CE O CE output to LCD driver
78 P82/A2 SRT_SW1 I SRT position detection input
79 P83/A3 SRT_SW2 I SRT position detection input
80 P84/A4 NC O Not used
81 P85/A5 NC O Not used
82 P86/A6 NC O Not used
83 P87/A7 C-MSC O EQ amp FF/PLAY control PLAY:HI OFF:LO
84 P40/AD0 C-F/R O Tape transport direction switching FWD:LO REV:HI
85 P41/AD1 C-MUTE O Tape muting control MUTE:HI
86 P42/AD2 C-MS_IN I Inter-music pulse detection
87 P43/AD3 C-MTL O MTL ON/OFF control ON:HI OFF:LO
88 P44/AD4 C-NR O Dolby ON/OFF control ON:HI OFF:LO
89 P45/AD5 NC O Not used
90 P46/AD6 NC O Not used
91 P47/AD7 RDS_DATA I Data input from RDS decoder
92 P50/A8 RDS_QUAL I Quality input from RDS decoder
93 P51/A9 AFC O PLL high-speed lock-up pin
94 P52/A10 FM/AM_SD I FM/AM SD input Station detected: Hi.
95 P53/A11 IF_COUNT I Not used
96 P54/A12 NC O Not used
97 P55/A13 AM+B O AM power control ON:HI
98 P56/A14 FM+B O FM power control ON:HI
99 P57/A15 NC O Not used
100 Vss - GND pin
<1 V: PHONE. >
2.5 V: Navigation muting.
During reception: Hi.
During search: Lo.
4
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KRC-608,678R/RY/RV/RYV
TEST MODE
(1) How to enter the test mode
While holding the FM and Preset 6 keys simultaneously,
reset the unit.
All indicators and display segments are ON at the start of
test mode.
(2) How to exit from the test mode
Reset the unit.
(Note) The test mode cannot be canceled by turning Acc
OFF, power OFF or momentary power down.
(3) (return to beginning)
Pressing the Track Down key jumps to the previous track
to the track being played.
(4) Test mode specification of the tape
o The Blank Skip is initially OFF.
(5) Audio
o The volume is -10 dB (displayed as 30).
o LOUD is OFF, and CRSC is also OFF whether the
function is provided or not.
o With the Bass/Treble and Balance/Fader controls,
pressing the Up/Down key switch the setting alternately to: Full Boost => Full Cut => Full Boost, Full Right ->
Full Left => Full Right, or Full Front ~> Full Rear =>
Full Front.
o With the high-pass filter, pressing the Up key sets it to
Through/100 Hz/200 Hz and pressing the Down key
sets it to 200 Hz/100 Hz/Through.
o Other adjustments function in the same way as normal
mode.
(6) Backup current measurement
When the unit is reset (backup turned on) while Acc is
OFF or when Acc is turned OFF in test mode, the MUTE
terminal goes on in 2 seconds, instead of 1.5 second.
(The panel, CD, C and MD mechanisms are not activated
at this time.)
Example: To enter "3510",
- Press the Preset 1 key 4 times.
- Press the Preset 2 key 6 times.
- Press the Preset 3 key 2 times.
- Press the Preset 4 key once.
7. Press and hold the DISPLAY key for 3 seconds to display "APPROVED".
8. Quit the test mode (See (2) How to exit from the test
mode.)
(8) How to clear the simple security code (K type only)
1. While the code is requested, press and hold the DISP
key and press and hold the VOL Up key for 3 seconds.
("----" disappears.)
2. Enter "KCAR" from the remote control unit. (Same
operation as the '98 model)
- Press numeric key 5 twice then press the Track Up
key. (This enters "K".)
- Press numeric key 2 three times then press the
Track Up key. (This enters "A".)
- Press numeric key 2 once then press the Track Up
key. (This enters "A".)
- Press numeric key 7 twice then press the Track Up
key. (This enters "R".)
3. The security is canceled and the unit enters the
TUNER mode.
(9) Other
o The DNPP/SBF key of the remote control unit (RC-510)
functions as the menu mode ON/OFF key.
o The OPEN/CLOSE key of the remote control unit (RC-
510) functions as the audio adjustment mode ON/OFF
key.
o The menu is displayed by displaying only the required
features.
o Message such as "CODE OFF" is not displayed when
power is turned ON.
o The contrast can be adjusted only to 0/5/10 using the
Up/Down keys.
(7) Security code registration after E2PROM replacement
servicing (E/M type only)
1. Enter the test mode. (See (1) How to enter the test
mode.)
2. Press the SRC key to set All OFF.
3. Press and hold the AUDIO key for 1 second to enter
menu mode.
4. Press the FM/AM key to select "SECURITY".
5. Press and hold the Track Up/Down for 2 seconds.
6. Enter the code by pressing the Preset 1, 2, 3 and 4
keys.
5
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KRC-608,678R/RY/RV/RYV
tongue
Turn 4 times.
End of Roller ass’y
FPC
No ITEM
INPUT
SETTINGS
OUTPUT
SETTINGS
TUNER
(RECEIVER)
SETTINGS
ALIGNMENT
POINTS
ALIGN FOR FIG.
CASSETTE DECK SECTION
[1] AZIMUTH
TCC-153
10kHz
Connect a
AC voltmeter
to SP OUT
TAPE PLAY
Head Azimuth
Screw
Adjust the azimuth for each
Lch/Rch or FWD/RVS
becomes maximum
[2]
PLAY BACK
LEVEL
TCC-130
Connect a
AC voltmeter
to CN200
TAPE PLAY
VR200A (L)
VR200B (R)
300mV (a)
F/E
CASSETTE
MECHANISM
VR200B
VR200A
Rch
Lch
CN200
L
G
R
(a) 300mV
AC voltmeter
ADJUSTMENT
ATTENTION OF ASSEMBLY
Assembly of FPC(Flexible PC board) onto Roller ass'y
Turn Roller ass'y by 4 times.
Hook the end of Roller ass'y to the tongue.
Insert the FPC into the slit of Roller ass'y then release the end of Roller ass'y and the tongue.
6
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C301A
C301B
R350
R102
R104
JC6
JC4
JC2
C601
JC20
JC21
JC18
JC19
JC16
JC30
JC53
JC50
R613
JC11
JC36
JC12
JC17
JC14
JC15
JC33
JC13
JC8
JC7
JC25
JC34
JC37
JC57
JC24
JC22
JC9
JC23
R100
C212
JC10
R351
R605
R253
R23
C253
C606
R44
R45
R37
JC31
JC27
JC28
JC29
C6
C2
R628
JC32
R38
C613
R624
C154
R608
R611
R606
R403
R402
R400
R404
R406
R407
R408
R405
R409
R644
C155
C404A
C10
C404B
R600
R602
C603
C602
R601
R307
C301
C305
C303
C304
R509
C310
R503
R505
C512
R504
R506R502
C214B
C214A
C354
JC5
JC3
TH500
R206
C211
C210
R208
R207
C209
R508
C510
R352B
R352A
R353B
R103
R101
R210A
R211A
C201A
JC35
R201A
R211B
R210B
C201B
R201B
C200B
R200B
C200A
R200A
R106
C151
R105
C104
C109
C107
C105
C102
C100
R353A
R204
R302
R302
R303
C306
R308
R306
R47
R36
R69
R27
C16
C15
R14
R13
R2
R4
R6
R8
R10
R12
C5
R34
R33
C615
R627
R25
R60
R59
R68
R67
R62
R61
C22
C8
JC51
R609
JC26
EB
EB
EB
EB
EB
EB
EB
EB
EB
EB
EB
EB
EB
EB
EB
EB
EB
BE
BE
BE
E
B
3
4
1
2
D507
D506
D501
D402
D403
D404
D6
D5
D405
D608
D614
D8
D7
Q605
Q614
Q3
Q617
Q5
Q600
Q601
Q104
Q101
Q103
Q612
Q606
Q611
Q625
Q615
Q1 Q2
Q303
Q302
Q500
Q621
IC2
R401A
R401B
C400
R643
C624
R354B R354A
R305
C308
C307
R304
R616
R620
R618
C608
C604
JC39
R619
R617
R621
R356B
C206B
C206A
C352A
VR200B
ET1
VR200A
C352B
R355B
R357BR356A
C353B
R355A
R357A
C353A
R603
R615
JC451
JC40
JC52
JC41
C300
JC38
JC42
JC56
JC55
JC54
JW18
JW16
JW15
JC43
C20
R626
C621
R634
C13
R641
C250
C153
C251
C252
R52
R53
C254
R51
R203
JC46
R205
RN3
RN2
R15
R22
R19
R18
R21
R17
R16
R1
R50
C207B
C18
C17
C504A
C505B
C505A
C504B
R65
R20
C502A
C503B
C503A
C502B
C500A
C501B
C501A
R501B
R501A
C500B
R500A
R500B
R300
R209
C213
R29
R35
R42
C7
R28
R24
R26
R11
R9
R7
R5
R3
C11
R57
R56
R55
R54
R58
C616
C14
C19
C4
C3
R64
R46
C625
C205B
R202B
R202A
C205A
C207A
R39
R40
C21
C618
JC44
RN400
L1
L100
L102
L105
L104
L106
L103
L300
L105
R629
L101
R625
R252
C402B
C612
C623
C610
C622
C1
C614
C403
C607
C605
C402A
C309
JW1
JW9
JW17
JW10
JW2
JW11
JW13
JW5
JW8
JW7
JW12
JW3
JW4
EBEB
EB
EB
R604
R612
R614
R610
R251
R250
C255
C609
C12
R43
JC47
R254
R255
C507
R32
C506
L600
C600
C508
C509
C350A
C350B
C511
X150
RN1
RN150
RN7
RN6
C208
C204
C103
C106
C108
C101
C150
C152
C110
C351B
C351A
RN4
X2
X1
RN5
R607
C626
JC48
C9
JC6
1
1
11
10
2
13
25
14
1
14
28
15
1
1
125
1
24
3
113
1
1
4
24
31
1
64
52
2
2
19
253748612101113
8
16
18
17
9
7
1
8
16
9
8
1
1
1
5
4
2
10
11
20
21
30
31
40
30
80
51
50
31
81
100
14
BE
BE
EB
EB
EB
EB
EB
EB
EB
EB
BE
BE
BE
BE
BE
D400B
D401
MAIN UNIT
D400A
Q604
Q602
IC3
IC300
IC500
CN350
IC250
IC1
IC200
IC150
Q102
Q100
CN3
CN201
TU100
CN100
CN200
CN1
Q618
Q603
Q607
Q608
Q624
CN250
Q610
Q622
D603
D601
CN400
CN600
D613
D100
D605
D612
D250
D617
D251
D615
D607
D503B
D503A
D502B
D502A
D505A
D505B
D504A
D504B
D606
D610
D300
D604
D600
D350A
D350B
D351
D352A
D352B
Q350B
Q350A
Q351B Q351A
Q616
Q300
Q620
Q301
A BDFHJCEGI
R915
R900
C911
RN901
RN900
R901
R904
R920
R921
C909
122
13
1
R923
C900
R916
R917
R918
R932
R931
R914
R919
C906
C901
C902
C907
C903
C910
C908
C904
C905
R903
R905
R912
R911
R902
R913
R910
R925R929
R926
R927
R928
R907
R908
R930
R906
R909
R922
130
31
50
5180
81
100
BE
BE
BE
BE
BE
EB
IC900
CN900
D922
D921
Q905
Q901
Q902
Q900
Q903
Q904
PROG
EJECT
RST
AM
FM
32
41
SRC
DISP
AUD
654321
1
68
35
36
ATT
VOL-
VOL+
AUTO
D919
D918
CONTROL UNIT
D904
IC901
D902
D907
D905D910
D909
D908D913
D912
D906
D903
S903
S927
S902
S910
S926
S908
S916
S901
S914
S900
S925
S922
S921
S920
S928
S923
S924S906S913
D911
D916
D914
D900
D923
D901
D915
S919
S918
S911
S912
S904
S904
LCD900
S905
S907
S909
S917
S929
S915
D917
S801
S800
14
CN800
SWITCH UNIT
MAIN UNIT
Ref.No. Address Ref.No. Address Ref.No. Address Ref.No. Address
IC1 4E Q100 3F Q351B 2G Q611 4B
IC2 4D Q101 3F Q500 3F Q612 5D
IC3 3C Q102 3F Q600 2E Q614 5D
IC150 4C Q103 3F Q601 2E Q615 5D
IC200 4F Q104 4G Q602 3B Q616 5C
IC250 4C Q300 3D Q603 3C Q617 4C
IC300 3E Q301 3E Q604 3B Q618 5C
IC500 1E Q302 3E Q605 3C Q620 4B
Q1 4C Q303 3E Q606 3B Q621 5A
Q2 4D Q350A 2F Q607 3D Q622 5B
Q3 5D Q350B 2F Q608 3D Q624 5A
Q5 5E Q351A 2G Q610 4B Q625 5B
PC BOARD (Component side view)
1
2
3
4
5
6
7
87
Refer to the schematic diagram for the value of resistors and capacitors.