JVC KT-DB1000 User manual
SERVICE MANUAL
COPYRIGHT © 2002 VICTOR COMPANY OF JAPAN, LTD.
No.49758
2002/09
KT-DB1000
DAB Tuner Unit
49758200209
KT-DB1000
TABLE OF CONTENTS
Safety precaution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Disassembly method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Description of major ICs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
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KT-DB1000
2
SECTION 1
Safety precaution
CAUTION
Burrs formed during molding may be left over on some parts of the chassis. Therefore, pay attention to such burrs in
the case of preforming repair of this system.
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KT-DB1000
3
SECTION 2
Disassembly method
2.1 Main body
2.1.1 How to remove a top cover (See Figure 1 and 2.)
(1) Screw A attaches a top cover to the main body. Remove
the two screws A from the both sides of the main body.
(2) Raise the top cover in a direction that the arrow indicates.
And the top cover will be removed.
Fig.1
Fig.2
2.1.2 How to remove a main board (See Figure 3.)
(1) Remove the four screws B and the two screws C that at-
tach the main board to the main body.
(2) Raise the main board in a direction that the arrow indi-
cates. And the main board will be removed.
Fig.3
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KT-DB1000
4
SECTION 3
Description of major ICs
3.1 MN102H60KCB (IC701) : Controller
• Pin layout
• Pin functions
No. Symbol I/O Function
1 - - Not use
2 LCDRS O Resistor select output terminal for LCD module
3 LCDR/W O Read/Write select output terminal for LCD module
4 LCDE O Data read/write start up output for LCD module
5~12 LCDDB0~7 O Data bus output 0 terminal for LCD module
13 JBUSCK I/O JBUS clock input/output terminal
14 JBUSDAI I JBUS data input terminal
15 JBUSDAO O JBUS data output terminal
16 JBUSI/O O JBUS input/output select output terminal
17 VDD - Powersupply terminal
18 SYSCKO O System clock(19.6608MHz) output terminal
19 GND - Connect to GND
20 XI I Connect to GND
21 NC O Open
22 VDD - Power supply trerminal
23 OSCI I X'tal connect terminal(19.6608MHz)
24 OSCO O X'tal connect terminal(19.6608MHz)
25 MODE I Mode setting input terminalpull up(single chip mode)
26 EEPRMDI I EEPROM(for preset data save)data input terminal
27 EEPRMDO O EEPROM(for preset data save)data output terminal
28 EEPRMCK O EEPROM(for preset data save)clock output terminal
29 EEPRMCS O EEPROM(for preset data save)chip select terminal
30~32 - - Not use
33 CKSEL O SYSCK output enable select terminal, "H" output enable
34 AVDD - Analogue power supply terminal
35 DAISEL O DAI output enable select terminal, "H" output enable
36 RDISEL O RDI output enable select terminal, "H" output enable
37 CIRSEL I CIR monitor output enable select terminal, "H" output enable
38 AGCSEL I AGC internal/external select terminal, "H" external(AGC outpput enable)
39 OPMODE0 I Operation mode setting terminal 0
40 OPMODE1 I Operation mode setting terminal 1
41 DUMMY I Dummy mode select terminal, "H" dummy mode
42 - - Not use
43 VREF- - Analogue reference power supply terminal, connect to GND
44 KEY0 I Test key analogue voltage onput 0
45 KEY1 I Test key analogue voltage input 1
46 KEY2 I Test key analogue voltage input 2
47 KEY3 I Test key analogue voltaeg input 3
48 TUSDA O Tuner PLL data output terminal
49 TUSCL O Tuner PLL clock output terminal
50 MPUCK O DAB MPU interface clock output terminal
51 MPUDAI I DAB MPU interface data input terminal
52 MPUDAO O DAB MPU interface data outut terminal
53 DABRST O DAB LSI/TUNER reset output terminal, "L" reset
54 VREF+ - Analogue reference poser supply terminal, connect to AVDD
55 DABDARX I FIC packet data stream output data input terminal
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5
56 DABDATX O FIC packet data stream outout data output terminal
57 MPUEN O DAB MPU interface chip enable output terminal
58 MPUMOD O DAB MPU interface mode signal outpout terminal
59 DZFINL I DZFL input terminal from DAC, "H" outout AMUTEL
60 DZFINR I DZFL input terminal from DAC, "H" outout AMUTER
61 AGND - Analogue GND terminal
62 AUDSEL O Audio signal select output terminal, "L" DAB "H" CD changer
63 AMUTEL O L-CH mute output terminal, "H" L-CH mute
64 AMUTER O R-CH mute output terminal, "H" R-CH mute
65 ANT+BIN I Antenna power supply voltage monitoer input terminal
66 VDD - Power supply
67 - - Not use
68 DACRST O DAC rest resr output terminal, "L" reset
69 - - Not use
70 SDCK I DAB serial data clock input terminal
71 SDDA I DAB serial data input terminal
72 SDWD I DAB sericl data window input terminal
73 SIFDA I/O On board serial write data input/output terminal pullup
74 SIFCK I On board serial write clock input terminal pullup
75 - - Not use
76 WFIC I Interrupt inout from DAB LSI, "L" triger detect
77 NIRQ I DDOWFIC input terminal from DABSEL
78 JBUSINT I JBUS interrupt input
79 PSAVE1 I PSAVE1(power off)input interrupt triger detect at "L" level
80 PSAVE2 O PSAVE2(STOP mode) input
81 POWOUT O Power on output terminal, "H" power on
82 RESET I Reset input terminal, "L" reset
83 VDD - POwer supply terminal
84 INDOUT0 O Indicator output 0 for test
85 INDOUT1 O Indicator output 1 for test
86 INDOUT2 O Indicator output 2 for test
87 INDOUT3 O Indicator output 3 for test
88 INDOUT4 O Indicator output 4 for test
89 INDOUT5 O Indicator output 5 for test
90 INDOUT6 O Indicator output 6 for test
91 INDOUT7 O Indicator output 7 for test
92 GND - GND terminal
93 DACCDTO O DAC chip select output
94 DACCCLK O DAC control clock output
95 DACCSN O DAC control data output
96~100 - - Not use
No. Symbol I/O Function
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3.2 AK4382AVT-X (IC501) : D/A converter
• Pin layout
• Block diagram
• Pin function
Pin No. Symbol I/O Function
1 MCLK I Master Clock Input Pin
2 BICK I Audio Serial Data Clock Pin
3 SDTI I Audio Serial Data Input Pin
4 LRCK I L/R Clock Pin
5 PDN I Power-Down Mode Pin
6 CSN I Chip Select Pin
7 CCLK I Control Data Input Pin
8 CDTI I Control Data Input Pin
9 AOUTR- O Rch Negative Analog Output Pin
10 AOUTR+ O Rch Positive Analog Output Pin
11 AOUTL- O Lch Negative Analog Output Pin
12 AOUTL+ O Lch Positive Analog Output Pin
13 VSS - Ground Pin
14 VDD - Power Supply Pin
15 DZFR O Rch Data Zero Input Detect Pin
16 DZFL O Lch Data Zero Input Detect Pin
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• Pin functions
Pin No. Symbol I/O Function
1,2 TESTIN0,TESTIN1 I Input terminal for test.
3 AVDD - Analogue VDD terminal.
4ADVRT - Reference voltage terminal for AD concerter top side.
5 ADIN - Analogue IF signal input terminal.
6 ADVRB - Reference voltage terminal for AD converter bottom side.
7 AVSS - Analogue VSS.
8 TESTMD - Test mode setting terminal.
9 ADCINT I AD converter internal/external select terminal.
10~19 DIN0~DIN9 I External AD converter data input terminal.
20 NADCPD I Internal AD converter power down control input terminal.
21 VSS0 - Digital VSS.
22 ADCK O AD converter clock signal output terminal.(8.192MHz)
23 ADCOVER O AD converter overflow detection ooutput terminal.
24 NADCPSC O AD converter power save control signal output terminal.
25 NULMON O NULL signal detection output terminal.
26 FSYO O Flame synchronization monitor signal output terminal.
27 CIRSYN O CIR monitor synchronization signal output terminal.
28 CTLCLK O CIR DA converter bit clock output terminal.(1.536MHz)
29 CTLLR O CIR DA converter LR clock output terminal.
30 CTLDAT O CIR DA converter data output terminal.
31 AGCDAT O External AGC control signal output terminal.(ADC output level)
32 LVDD0 - Internal digital VDD terminal.
33 VSS1 - Digital VSS terminal.
34 SMCK O Audio DA converter master clock output terminal.(256 Fs)
35 SLRCK O Audio DA converter LR clock output terminal.(Fs:48 kHz)
36 SCLK O Audio DA converter serial clock output terminal.(64 Fs)
37 SDAT1 O Audio DA converter serial data output 1 terminal.
38 SDAT2 O Audio DA converter serial data output 2 terminal.
39 MP2CLK O External DAB audio(MP2) clock output terminal.(2.048MHz)
40 MP2IN I External DAB audio(MP2) data input terminal.
41 MP2W I External DAB audio(MP2) window signal input terminal.
42 DAOUT O Digital audio interface output terminal. (IEC958)
43 VDD0 - External digital VDD terminal.
44 VSS2 - Digital VSS terminal.
45 RDIOUT O RDI data output terminal.
46 SDOWD O Serial data output window output terminal.
47 SDODT O Serial data output data output terminal.
48 SDOCK O Serial data output clock output terminal.(2.048 MHz)
49 DDODAT O Direct data output serial data output terminal.
50 DDOCLK O Direct data output serial clock output terminal.(2.048MHz)
51 DDOERF O Direct data output error flug output terminal. (H:error)
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9
52 DDOWMSC O Direct data output MSC window output terminal.
53 LVDD1 - Internal digital VDD terminal.
54 VSS3 - Digital VSS terminal.
55~60 DDOMNO0~DDOMNO5 O DIrect data output MSC sub channel ID output terminal.
61 DDOWFIC O Direct data output FIC window output terminal.
62 VDD1 - External digital VDD terminal.
63 VSS4 - Digital VSS terminal.
64 NIRQ O Interllupt request output terminal.
65 MPUTX O MPU interface serial data output terminal.
66 MPURX I MPU interface serial data input terminal.
67 MPUCLK I MPU interface serial clock input terminal.
68 NMPUEN I MPU interface chip enable input terminal.
69 MPUMOD I MPU interface mode signal input terminal.
70 MDSPMO0 O MDSP status monitor output 0 terminal.
71 MDSPMO1 O MDSP status monitor output 1 terminal.
72 MVDD0 - DRAM VDD terminal.
73 MVSS0 - DRAM VSS terminal.
74 MDSPMO2 O MDSP status monitor output 2 terminal.
75 MDSPMO3 O MDSP status monitor output 3 terminal.
76~79 SDSPMO0~SDSPMO3 O SDSP status monitor output terminal.
80 MVDD1 - DRAM VDD terminal.
81 MVSS1 - DRAM VSS terminal.
82 VSS5 - Digital VSS terminal.
83 LON - Internal onchip power switch input terminal.
84 VDD2 - External digital VDD terminal.
85 VDD3 - External digital VDD terminal.
86 VOUT0 - Onchip power supply output terminal.
87 VOUT1 - Onchip power supply output terminal.
88 NRST I Master reset input terminal.
89 MCLKEN I Master clock enable input terminal.
90 MCLK24 I Mster clock input terminal.(24.576 MHz)
91 MCLKO O Master clock oscillation output terminal.
92 PWMVCXO O PWM output terminal for mastewr clock VCXO.
93 LVDD2 - Internal digital VDD terminal.
94 VSS6 - Digital VSS terminal.
95~100 TEST0~TEST5 I Test mode setting terminal.
Pin No. Symbol I/O Function
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10
3.4 BR93LC66F-X (IC702) : EEPROM
• Terminal layout • Pin Functions
3.5 S-81250SGUP-X (IC805) : Regulator
• Pin layout • Block diagram
3.6 NJM4580V-X (IC901) : Ope amp.
• Pin layout & Block diagram
3.7 TA48033F-X (IC806) : Reglator
• Pin layout
Symbol I/O Function
VCC - Power supply
GND - Connect to GND
CS I Chip select input
SK I Serial clock input
DI I Start bit, OP-code,address, serial data input
DO O Serial data output
Internal state display output of READY/BUSY
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11
3.8 UPC7805AHF (IC803) : Regulator
• Pin layout
• Block diaglam
3.9 NJM2370U09-X (IC801) : Regulator
• Pinlayout
• Block diagram
• Pin function
Pin No Function
1 Control
2GND
3 Noise bypass
4Vout
5Vin
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KT-DB1000
12
3.10 BA033FP-X (IC804) : Regilator
• Pin layput
• Block Diagram
3.11 TC7WT241FU-X (IC771,IC772) : Buffer
• Pin layotu & Blocl diagram
3.12 NJM2750M-X (IC911) : Audio selector
• Pin layout & Block diagram • Pin function
Pin No Function Pin No Function
1IN1a 9IN3b
2 CNT1 10 (N.C.)
3IN2a 11OUTb
4 CNT2 12 Vref
5 IN4a 13 IN3a
6IN1b 14V+
7IN2b 15OUTa
8IN4b 16GND
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KT-DB1000
13
3.13 PST9121N-X (IC851) : System reset
• Pin layout
• Block diagram
3.14 SI-8050JF-F1 (IC802) : Regulator
• Pin layout • Pin function
• Block diagram
Pin No. Pin function
1Vin
2 SW out
3GND
4Vos
5ON/OFF
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TEL 13942296513 QQ 376315150 892498299
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(No.49758)
KT-DB1000
MOBILE ELECTRONICS BUSINESS DIVISION
PERSONAL & MOBILE NETWORK BUSINESS UNIT. 10-1,1chome,Ohwatari-machi,Maebashi-city,371-8543,Japan
VICTOR COMPANY OF JAPAN, LIMITED
2002/09
Printed in Japan
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SERVICE MANUAL
COPYRIGHT © 2005 Victor Company of Japan, Limited No.49758B
2005/6
DAB TUNER UNIT
49758B20056
KT-DB1000
Lead free solder used in the board (material : Sn-Ag-Cu, melting point : 219 Centigrade)
TABLE OF CONTENTS
1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
2 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
Area suffix
E ------------- Southern Europe
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TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com
1-2 (No.49758B)
SPECIFICATION
Design and specifications subject to change without notice.
Receivable frequencies Band lll 174.928 MHz to 239.200 MHz
L-Band 1452.960 MHz to 1490.624 MHz
Power Requirement Operating Voltage DC 14.4 V (11 V to 16 V allowance)
Ground System Negative ground
Allowable Operating Temperature -10°C to +50°C
Dimensions (W ×H ×D) 132 mm ×34 mm ×73 mm
Mass Approx. 375 g
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TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com
(No.49758B)1-3
SECTION 1
PRECAUTION
1.1 Safety Precautions
(1) This design of this product contains special hardware and
many circuits and components specially for safety purpos-
es. For continued protection, no changes should be made
to the original design unless authorized in writing by the
manufacturer. Replacement parts must be identical to
those used in the original circuits. Services should be per-
formed by qualified personnel only.
(2) Alterations of the design or circuitry of the product should
not be made. Any design alterations of the product should
not be made. Any design alterations or additions will void
the manufacturers warranty and will further relieve the
manufacture of responsibility for personal injury or property
damage resulting therefrom.
(3) Many electrical and mechanical parts in the products have
special safety-related characteristics. These characteris-
tics are often not evident from visual inspection nor can the
protection afforded by them necessarily be obtained by us-
ing replacement components rated for higher voltage, watt-
age, etc. Replacement parts which have these special
safety characteristics are identified in the Parts List of Ser-
vice Manual. Electrical components having such features
are identified by shading on the schematics and by ( ) on
the Parts List in the Service Manual. The use of a substitute
replacement which does not have the same safety charac-
teristics as the recommended replacement parts shown in
the Parts List of Service Manual may create shock, fire, or
other hazards.
(4) The leads in the products are routed and dressed with ties,
clamps, tubings, barriers and the like to be separated from
live parts, high temperature parts, moving parts and/or
sharp edges for the prevention of electric shock and fire
hazard. When service is required, the original lead routing
and dress should be observed, and it should be confirmed
that they have been returned to normal, after reassem-
bling.
(5) Leakage shock hazard testing
After reassembling the product, always perform an isola-
tion check on the exposed metal parts of the product (an-
tenna terminals, knobs, metal cabinet, screw heads,
headphone jack, control shafts, etc.) to be sure the product
is safe to operate without danger of electrical shock.Do not
use a line isolation transformer during this check.
• Plug the AC line cord directly into the AC outlet. Using a
"Leakage Current Tester", measure the leakage current
from each exposed metal parts of the cabinet, particular-
ly any exposed metal part having a return path to the
chassis, to a known good earth ground. Any leakage cur-
rent must not exceed 0.5mA AC (r.m.s.).
• Alternate check method
Plug the AC line cord directly into the AC outlet. Use an
AC voltmeter having, 1,000Ωper volt or more sensitivity
in the following manner. Connect a 1,500Ω10W resistor
paralleled by a 0.15µF AC-type capacitor between an ex-
posed metal part and a known good earth ground.
Measure the AC voltage across the resistor with the AC
voltmeter.
Move the resistor connection to each exposed metal
part, particularly any exposed metal part having a return
path to the chassis, and measure the AC voltage across
the resistor. Now, reverse the plug in the AC outlet and
repeat each measurement. Voltage measured any must
not exceed 0.75 V AC (r.m.s.). This corresponds to 0.5
mA AC (r.m.s.).
1.2 Warning
(1) This equipment has been designed and manufactured to
meet international safety standards.
(2) It is the legal responsibility of the repairer to ensure that
these safety standards are maintained.
(3) Repairs must be made in accordance with the relevant
safety standards.
(4) It is essential that safety critical components are replaced
by approved parts.
(5) If mains voltage selector is provided, check setting for local
voltage.
1.3 Caution
Burrs formed during molding may be left over on some parts
of the chassis.
Therefore, pay attention to such burrs in the case of pre-
forming repair of this system.
1.4 Critical parts for safety
In regard with component parts appearing on the silk-screen
printed side (parts side) of the PWB diagrams, the parts that are
printed over with black such as the resistor ( ), diode ( )
and ICP ( ) or identified by the " " mark nearby are critical
for safety. When replacing them, be sure to use the parts of the
same type and rating as specified by the manufacturer.
(This regulation dose not Except the J and C version)
Good earth ground
Place this
probe on
each exposed
metal part.
AC VOLTMETER
(Having 1000
ohms/volts,
or more sensitivity)
1500 10W
0.15 F AC TYPE
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TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com
1-4 (No.49758B)
SECTION 2
SPECIFIC SERVICE INSTRUCTIONS
2.1 HOW TO IDENTIFY MODELS
2.1.1 NAME PLATE
Discernment sign
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TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com
(No.49758B)1-5
SECTION 3
DISASSEMBLY
3.1 Main body
3.1.1 How to remove a top cover
(See Figure 1 and 2.)
(1) Screw Aattaches a top cover to the main body. Remove
the two screws Afrom the both sides of the main body.
(2) Raise the top cover in a direction that the arrow indicates.
And the top cover will be removed.
Fig.1
Fig.2
3.1.2 How to remove a main board
(See Figure 3.)
(1) Remove the four screws Band the two screws Cthat at-
tach the main board to the main body.
(2) Raise the main board in a direction that the arrow indicates.
And the main board will be removed.
Fig.3
A
A
B
C
B
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TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com
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