Kenwood KDCBT 7539 U Service Manual

Page 4

KDC-BT7539U/BT804I U
/BT814l UY/BT838U

COMPONENTS DESCRIPTION

O SWITCH UNIT (X16-638x-xx)
Ref. No. Application / Function Operation / Condition / Compatibility
|C1 Panel u-COM
IC3 Remote Control IC Remote control receiver
Q1 Triangle Red LED SW Triangle LED lights when Q1 '5 base level goes Hi.
Q3 Blue LED SW (Vol left) Blue LED brightness control (PWM).
Q4 Blue LED SW (FL Top & A'l'l' Key) Blue LED lights when 04s base level goes Hi.
Q5 Blue LED SW (FL under) Blue LED brightness control (PWM).
Q6 Blue LED SW (Multi function Key) Blue LED brightness control (PWM).
Q11 VFD Filament Voltage (-) VFD Cut-off bias (5-7.5V) supply.
0 ELECTRIC UNIT (X34-597x-xx)
Ref. No. Application / Function Operation / Condition / Compatibility
|C11 Audio8V Ref Power Supply Output 1.27V.
|C21 Regulator Power supply for lCYOO. (USB u-com)
ICB1 Switching Regulator Power supply for D5\/. (to USB/PANEL)
|C71 Switching Regulator Power supply for FL+B. (to PANEL)
|C211 Hi-side SW Detection of USB Over Current
IC301 RDS decoder IC RDS decoder. (only E type)
IC331 OPAMP For AGC of the Spectrum Analyzer
IC451 Eelectrical Volume & Source Selecter Controls the source, volume, and tone.
ICSO1 Power IC Amplifies the front L/R and the rear L/R to 50W maximum.
ICGO1 System u-com Controls FM/AM tuner, the changer, CD mechanism, Panel, volume and tone.
|C602 Reset lC L when detection voltage goes below 3.6V or less.
|C603 ROM CORRECTION For Main program correcting emergency (EEPiROM)
ICBO4 Muting logic lC Controls logic for muting.
ICBOS Logic IC Level Shift (3.3Va5V)
ICBO7 Logic IC Level Shift (5V~>3.3V)
ICGO8 EEPiROM Memory of TEL BOOK for Blue Tooth
|C700 Sub u-com USB/CD mechanism control
|C750 iPod Authentication Coprocessor iPod Authentication
|C751 ROM CORRECTION For USB program correcting emergency (EEPiROM)
ICS64 OP AMP +12dB Gain AMP 8. L.P.F for BT Output
ICQ65 Switching Regulator Power supply for BT3.3V. (to BT Module)
Q11 AudioSV AVR When Q13 & 012 go ON, A8V AVR outputs 8.0V.
Q12 AudioSV AVR SW When Q13Base goes Hi, Supply current to |C11.
Q13 AudioSV AVR SW When Q13Base goes Hi, Q12 & Q11 are ON.
021,22 B.U.5V AVR While BU is applied, BU5V AVR outputs +5V.
Q2324 PON5V When Q24base goes Hi, PON5V outputs +5V.
Q31 ,32 SERVO+B AVR When 033 & 034 go ON, AVR outputs 8V.
033,34 SERVO+B SW When Q34Base goes Hi, 033 is ON.
Q41 ,42 Illumination+B AVR When Q43 & 044 go ON, AVR outputs 10V.
Q43,44 Illumination+B SW When Q44Base goes Hi, Q43 is ON.
Q51 ,52 SW16V When 09 & Q34 go ON, The voltage appears. (~16V)
Q71 ,72 FDC+B AVR When Q43 goes ON, AVR outputs 9V (FL Filament)
Q81,82 FL+B SW When 081Base goes Hi, FL+B outputs 53V.

Page 7

KDC-BT7539U/BT8041 U
/ BT81 41 UY/ BT838U

MICROCOMPUTERS TERMINAL DESCRIPTION

Pin No. Pin Name l/O Application Truth Processing Operation Description
valuetable
30 PANiPANiDATA I Data from pane' to Stem mm UART MAX 500k
(Panel a System u-com)
Communication request from system
31 PAN,SYS,REQ O
p-com to panel (System u-com a Panel)
Communication request from panel to
32 PANiFANiREQ |
system u-com (Panel a System u-com)
33 BT,SYS,DATA 0 Data from system u-com to BT module
(System u-com a BT module)
33 NC 0 Not used (Models without 81) Output is fixed to L
34 BTiBTiDATA | Data from BT module to system p-com
(BT module a System p-com)
34 NC 0 Not used (Models without 81) Output is fixed to L
35 NC 0 Not used Output is fixed to L
36 PON lLL l/O Panel LED H: Power ON
FL bias power supply control Hi-Z: When panel is detach and power is OFF
37 NC 0 Not used Output is fixed to L
Power supply for panel u-com H: Power ON
38 PONiPANEL l/O , . .
Supply FL7VDD Hi-Z: When panel IS detach and power is OFF
39 ROMCORiDEI' | ROM correction writing request H: Can re-write ROM correction (I2C open)
EPM input terminal for re-writing
39 EPM | Rewritable when EPM input terminal is L
when starting to re-write
40 CDiMOTOR 0 CD motor control terminal
41 CDiLOEiLleW | CD detection terminal (chucking SW) H: Loading completed, L: No disc
42 CD,LOS,SW | CD loading detection terminal L: Ejection completed
43 CD,D|SC12,SW | CD disk detection terminal (12cm) L: 12cm disc
P | t' t | t ' i
44 PAN,SC,CON 0 fine Opera 'OhFon m 6m H: In normal condition, L: Stop the panel
CE when re-writing system u-com
45 CDiLOEJ l/O CD motor control terminal
46 S,SOC,REQ | Communication request from SOC to
system u-com (SOC a System u-com)
46 NC 0 Not used (Models without USB) Output is fixed to L
47 SOC,SSTOP O SOC stop terminal H: Normal, L: Stop SOC
47 CD SRAMSTB O Decoder SRAM STANDBY control L SRAM standb (6E)
* (Models without USB) ' y
48 SOCisRST O SOC reset terminal H: Normal, L: Reset (Bolero)
48 CDiRST 0 CD mechanism u-com RST terminal H: Normal, L: Reset
49 S,SYS,REO 0 Communication request from system
u-com to SOC (System u-com a SOC)
49 CD CCE 0 Command l/F
CD mechanism chip enable terminal
50 SOC,MUTE | DAC mute request H: Mute request, L: in normal condition
50 CDiMUTE | DAC mute request L: Mute request, H: in normal condition
For USB /FDC 5V power supply control ,
51 PONiDSV l/O _ H: ON, HI-Z: OFF
terminal
52 PON l/O Power supply control terminal H: ON, Hi-Z: OFF
53 OEMiDISPiDATA l/O External display DATA External display
53 NC 0 Not used (Models without BT/Models Out ut s f'xed to L
without OEMiDlSP) p '

Page 49

KDC-BT7539U/BT8041 U
/BT8141UY/BT838U

PARTS LIST

CAPACITORS
C C 4 5 T H 1 H 2 2 0 J 0 Capacitor value
7 7 7 7 7 7 0045 k
1 2 3 4 5 6 Color 010:1pF 2 2 o : 22pF
1 : Type ceramic, electro1ytlc, etc. 4 : Voltage rating 100 : 10pF W L
2 : Shape round, square, etc. 5 : Value 101 : 100pF Multlpller
3 : Temp. coelficrent 6 : Tolerance 102 : 1000pF : 0.001 uF 2nd number
103 : 0.01 uF 1st number
0 Temperature coefficient
1st Word 0 L P R S T U 2nd Word G H J K L
Color* Black Red Orange Yellow Green Blue Violet ppm/°C :30 :60 :120 :250 :500
ppm/°C o -80 -1 50 -220 -330 4170 -750 Example : CC45TH : -470:60ppm/°C
0 Tolerance (More than 10pF) (Less than 10pF)
Code C D G J K M X Z P No code Code B C D F G
(We) :0.25 :05 :2 :5 :10 :20 +40 +80 +100 More than 10uF : -10~+50 (pF) :01 :0.25 :05 :1 :2

-20 -20 -0 Lessthan 4.7uF:-10~+75

0 Voltage rating

2nd word A B C D E F G H J K V
1st word

0 1.0 1.25 1.6 2.0 2.5 3.15 4.0 5.0 8.3 8.0 -

1 10 12.5 16 20 25 31.5 40 50 63 80 35

2 100 125 160 200 250 315 400 500 630 800 -

3 1000 1250 1600 2000 2500 2150 4000 5000 6300 8000 -

0 Chip capacitors
(EX) C_0 7_3 F L

1 2 3 4

1 H 0 0 0 J - Refer to the tab1e above. ' Dimension

? 6 7 1 : Type L
(Chlp) (CH, RH, UJ, SL) 2 : Shape if
3 : Dlmenslon
(EX) C K L3 H 0 0 0 E 4 : Temp. coefficrent 1V
7

2 E E L 7 _
1 2 3 4 5 6 5 : Voltage rating
(Chlp) (B, F) 6 : Value Chip capacitor
7 : Tolerance Code L W T
Empty 56:05 50:05 Less than 2.0
A 45:05 32:04 Less than 2.0
RESISTORS B 45:05 20:03 Less than 2.0
0 Chip resistor (Carbon) C 45:05 1.25:0.2 Less than 1.25
(EX) R D 7 3 E B 2 B 0 0 O J D 32:04 25:03 Less than 1.5
T 7 5 Z ? T 7 E 32:02 1.6:02 Less than 125
(Chlp) (B, F) F 20:03 1.25:0.2 Less than 125
G 16:02 08:02 Less than 1.0
0 Carbon resistor (Normal type) H 1.0:0.05 05:005 0.5:0.05
(EX) RD 14 B B 20 000 J Chipresistor
T 7 5 Z ? T 7 Code L w T
E 32:02 1.6:02 1.0
1 : Type 5 : Rating wattage F 20:03 1.25:0.2 1.0
2 : Shape 6 : Value G 1.6:02 08:02 05:01
3 : Dimensron 7 : Tolerance H 1.0:0.05 05:005 0.35:005
4 : Temp. coefficient
. Rating wattage
Code Wattage Code Wattage Code Wattage
1J 1/16W 2C 1/6W 3A 1W
2A 1/10W 2E 1/4W 3D 2W
2B 1/8W 2H 1/2W

49