Kenwood LZ-702IR Service Manual
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Kenwood LZ-702IR Service Manual

Kenwood LZ-702IR Service Manual

Wide lcd monitor
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Download this manual See also: Training Manual, Instruction Manual
WIDE LCD MONITOR
LZ-702IR
QQ
3 7 63 1515 0
SERVICE MANUAL
Panel assy
(A64-3922-02)
PWR
V.OFF
IR
AV OUT
OFF
MODE
SCRN
V.SEL
MODE
MENU
TE
L 13942296513
www
.
WIDE LCD MONITOR
SELECT
Cord with plug (3.5m)
(E30-6538-05)
DC cord (with fuse)
(E30-6587-05)
x
ao
u163
y
i
2 9
8
Metallic cabinet
(A01-4413-02)
Q Q
3
6 7
1 3
1 5
Escutcheon
(B07-3174-01)
Accessory
(W01-1672-04)
co
.
9 4
2 8
© 2006-2 PRINTED IN JAPAN
B53-0380-00 ( N ) 960
0 5
8
2 9
9 4
2 8
Screw set
(N99-1782-05)
m
This product uses Lead Free solder.
9 9
9 9

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Summary of Contents for Kenwood LZ-702IR

  • Page 1 WIDE LCD MONITOR LZ-702IR 3 7 63 1515 0 SERVICE MANUAL © 2006-2 PRINTED IN JAPAN B53-0380-00 ( N ) 960 Panel assy Metallic cabinet (A64-3922-02) (A01-4413-02) WIDE LCD MONITOR V.OFF AV OUT SELECT MODE SCRN V.SEL MODE MENU L 13942296513 Escutcheon Cord with plug (3.5m)

  • Page 2: Block Diagram

    LZ-702IR BLOCK DIAGRAM 3 7 63 1515 0 ELECTRIC UNIT (X34- ) J102 AV-IN J103 AV-OUT IC201 VIDEO IC501 R513,514 ISOLATION IC401 VOUT1 -6dB Q401 AV-SW VOUT2 J801 LOUT2 IC202 ROUT2 ISOLATION LOUT1 A.GND ROUT1 COMP/SYNC V.GND D.GND REMOTE NDATA...

  • Page 3: Level Diagram

    LZ-702IR LEVEL DIAGRAM 3 7 63 1515 0 LEVEL DIAGRAM (AUDIO) ELECTRIC UNIT (X34) IC201 J102 J103 960mV AV-IN1 ISO AMP AV-OUT 1Vrms (1kHz) IC501 980mV IC202 J102 980mV AV-IN2 ISO AMP AV SWITCH 590mV 930mV 1Vrms (1kHz) VIDEO UNIT (X35)

  • Page 4: Components Description

    LZ-702IR COMPONENTS DESCRIPTION 3 7 63 1515 0 ELECTRIC UNIT (X34-4320-61) Ref. No. Application / Function Operation / Condition / Compatibility IC101 8.5V REG Regulates 8.5V IC102 5V REG Regulates 5V IC201 ISO AMP Audio input isolation amplifier (AV-IN2) IC202...
  • Page 5 LZ-702IR COMPONENTS DESCRIPTION 3 7 63 1515 0 Ref. No. Application / Function Operation / Condition / Compatibility IC800 IR TRANSMITTER Transmits infrared ray audio signal IC803,804 BAND SW Switches band IC901 REMOTE BUFFER Buffer for remote signal Oscillates PLL...
  • Page 6 LZ-702IR MICROCOMPUTER’S TERMINAL DESCRIPTION 3 7 63 1515 0 SYSTEM µ-COM : IC301 (X35- : VIDEO UNIT) Pin No. Pin Name Application Processing / Operation / Description VHOLD1 Not used Pull-down to VSS HLF1 Not used Pull-down to VSS I2C BUS interface clock...

  • Page 7: Microcomputer's Terminal Description

    LZ-702IR MICROCOMPUTER’S TERMINAL DESCRIPTION 3 7 63 1515 0 Pin No. Pin Name Application Processing / Operation / Description If level is “L” when INT1 is detected, it is judged PWR POWER KEY PWR key detection key is pressed. SCRN KEY SCRN key detection “L”...

  • Page 8: Test Mode

    LZ-702IR MICROCOMPUTER’S TERMINAL DESCRIPTION 3 7 63 1515 0 r : Horizontal display starting position setting Truth Value Table HPOS1 HPOS2 HPOS3 HPOS4 q : Monitor type switching FRONT OEM+ REAR TYPE 0 TYPE 1 w : Touch panel input mode...
  • Page 9 LZ-702IR TEST MODE 3 7 63 1515 0 Chroma Func screen To the HPOSI screen (Horizontal position adjustment) : [ ↓ ] (M/S) key on the remote controller • After the Chroma adjustment, save the memory into the To the Chroma Auto screen (γ-IC auto adjustment) E2PROM.
  • Page 10 LZ-702IR TEST MODE 3 7 63 1515 0 Menu screen Screen adjustment • Menu screen is the same as in normal mode (user mode). • Default is center. Click once to change between Full Down ↔ Center ↔ Full Up.
  • Page 11 LZ-702IR ADJUSTMENT 3 7 63 1515 0 γ Curve auto adjustment (X35-) Freerun frequency adjustment (X35-) γ Curve adjustable screen Adjustment procedure: Connect the display as required NTSC Line When γ curve auto adjustment is ran, q In order to set NHD (pin 22) entry to null on the timing...
  • Page 12 LZ-702IR ADJUSTMENT 3 7 63 1515 0 Step Positive/Negative Appraisal Sampling Enabling Line 53 at 5H five times. 1st step 24H~35H e-2 If VCOM_IN at 43H is below 1.6V, sampling VG volt- 2nd step 44H~55H age value a from 44, 46, 48, 50, 52 at 5H five times,...
  • Page 13 LZ-702IR ADJUSTMENT 3 7 63 1515 0 sampled voltage value c data (five times), and calcu- Vsbr late the average. Calculate the VG amplitude by subtracting averaged voltage value a from averaged voltage value c. Change the BRIGHT, GAMMA1 setting etc. on the value from t and adjust to the adaptation value.
  • Page 14 LZ-702IR ADJUSTMENT 3 7 63 1515 0 γ Curve adjustment procedure IC103 measure and adjust as shown below. e First, monitor R-output, and change the TINT values to Adjustment Adjustment Adjustment Adaptation item requirement waveform value/STEP adjust using [UP/Down] keys of remote controller. so that...
  • Page 15 LZ-702IR ADJUSTMENT 3 7 63 1515 0 with VR800. wTransmit infrared ray at the initial condition. Measure the Ch1: Input frequency of TP803 located closed to IC800 R_OUT (pin signal 8) using frequency counter, and adjust to 2.8MHz±50kHz with VR801.
  • Page 16 LZ-702IR PC BOARD (COMPONENT SIDE VIEW) 3 7 63 1515 0 ELECTRIC UNIT X34-4320-61 (J76-0222-02) C609 C614 C608 IC601 R216 C601 C603 J601 R217 C607 C616 C203 D609 IC201 C613 C204 R623 IC501 R610 C207 C205 C502 R807 J801 C209...
  • Page 17 LZ-702IR PC BOARD (FOIL SIDE VIEW) 3 7 63 1515 0 ELECTRIC UNIT X34-4320-61 (J76-0222-02) R501 TP205 TP204 R203 TP209 R202 TP607 TP601 TP603 R204 R603 R507 TP604 TP203 R602 TP606 TP609 TP202 TP602 R205 TP207 TP208 TP201 C224 TP801...
  • Page 18 LZ-702IR PC BOARD (COMPONENT SIDE VIEW) 3 7 63 1515 0 VIDEO UNIT X35-4640-62 (J76-0223-02) C813 F901 L902 L901 L800 R987 IC80 IC801 F501 Q501 C812 L502 C549 Q503 C910 R534 C531 C911 D906 IC501 C906 R521 R549 C821 D909...
  • Page 19 LZ-702IR 3 7 63 1515 0 C819 C807 C823 IC802 Q807 C824 VR802 C805 IC803 3M:R VR801 C519 2M:R IC800 C825 VR803 IC505 3M:L IC804 C534 C539 X35-4640-62 Ref. No. Address Q504 C300 IC302 C315 R308 R327 IC103 C303 IC303...
  • Page 20 LZ-702IR PC BOARD (FOIL SIDE VIEW) 3 7 63 1515 0 VIDEO UNIT X35-4640-62 (J76-0223-02) D805 D807 D806 D804 D803 R820 TP801 R821 TP802 C809 Q818 R819 R809 Q819 C801 R801 R808 TP805 R800 R812 Q812 C802 R532 TP509 C522...
  • Page 21 LZ-702IR 3 7 63 1515 0 D800 D803 D802 D801 X35-4640-62 Ref. No. Address TP900 TP901 TP902 TP903 IC101 TP904 TP905 IC105 TP906 TP907 TP908 R901 IC106 D900 TP909 TP910 R903 IC108 TP911 R929 TP912 R933 TP913 IC300 TP914 R921...
  • Page 22 LZ-702IR ELECTRIC UNIT (X34-432x-xx) 3 7 63 1515 0 R216 J102 TP204 AVIN2 CVBS R203 TP205 AV IN2 VGND 4.7V R217 ISO AMP IC201 TP209 AVIN1 CVBS C502 C207 10u16 4.2V R202 8.5V BIAS TP210 AOUT AVIN1 VGND 4.6V 4.7V...
  • Page 23 TP819 ACC (for DC/DC) TP820 ACC (for INV) • DC voltages are as measured with a high impedance voltmeter. Values may vary slightly due to variations between individual instruments or/and units. LZ-702IR (1/2) X34-4320-61 (2/2)
  • Page 24 C906 220u16 TP907 D915 C SYNC C.SYNC TP908 Q810 V GND SW5V X34- J801 TP909 R901 100 LZ-702IR O PARKING/MON RESET R902 100 TP910 TDATA/MON DET R903 100 TP911 NDATA/SYS ON R930 R904 100 TP912 POWER R921 R905 100 TP913...
  • Page 25 3.3V OUT+ Q812 Q811 4.0V 4.0V 4.0V D915 MIX & INVERTER MUTE C811 0.1 C827 MUTE Q810 47u16 LZ-702IR ONLY SW5V SW5V Q806 IR : INFRARED RAY BAND BAND Q805 Q800 IR-TX BAND SW IC803 FREQ C819 ADJ (R) 4.7u50 5.0V...
  • Page 26 LZ-702IR 3 7 63 1515 0 CP310 TP305 CP306 CP312 CP325 CP304 CP307 CP309 C329 1000P 3.3V R321 10K MENU KEY R322 3.3V 3.3V POWER KEY CP300 3.3V SYS ON C324 1000P NTSC PAL 3.3V CP314 3.3V MODE3 R316 10K...
  • Page 27 LZ-702IR 3 7 63 1515 0 C110 22u16 R173 C33 MO 1 MO 2 MO 3 680P 10u16 100P 1000P FULL Q103 R118 NORMAL C146 WIDE 1000P ZOOM R121 1.8V 5.0V CINEMA GAMMA 4.7K B-SIGNAL BUFFER 1.8V 1.9V R147 3K...
  • Page 28 0-62 customer. VISUAL LINE AUDIO LINE • DC voltages are as measured with a high impedance GND LINE voltmeter. Values may vary slightly due to variations be- B LINE B LINE tween individual instruments or/and units. LZ-702IR (2/2) X35-4640-62 (5/5)

  • Page 29: Exploded View (Unit)

    LZ-702IR EXPLODED VIEW (UNIT) 3 7 63 1515 0 2.6x6 N09-6271-05 N82-2005-48 N82-2012-43 (with F1) N80-3008-41 N89-3006-48 N80-3008-41 L 13942296513 X35- X34-432 LCD1 u163 Parts with the exploded numbers larger than 700 are not supplied.

  • Page 30: Parts List

    LZ-702IR PARTS LIST 3 7 63 1515 0 New parts Parts without Parts No. are not supplied. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Teile ohne Parts No. werden nicht geliefert. Desti- Desti- Ref. No.
  • Page 31 LZ-702IR PARTS LIST 3 7 63 1515 0 ELECTRIC UNIT (X34-4320-61) Desti- Desti- Ref. No. Parts No. Description Ref. No. Parts No. Description nation nation R209 RK73FB2B102J CHIP R 1.0K J 1/8W CK73HB1H102K CHIP C 1000PF R210,211 RK73GB2A750J CHIP R...

  • Page 32: Video Unit (X35-4640-62)

    LZ-702IR PARTS LIST 3 7 63 1515 0 VIDEO UNIT (X35-4640-62) Desti- Desti- Ref. No. Parts No. Description Ref. No. Parts No. Description nation nation C132 CK73EB1A106K CHIP C 10UF C410 CK73GB1H104K CHIP C 0.10UF C133 CK73GB1A105K CHIP C 1.0UF...
  • Page 33 LZ-702IR PARTS LIST 3 7 63 1515 0 VIDEO UNIT (X35-4640-62) Desti- Desti- Ref. No. Parts No. Description Ref. No. Parts No. Description nation nation C907-909 CK73GB0J475K CHIP C 4.7UF RK73HB1J102J CHIP R 1.0K J 1/16W C910,911 CE32BM1C221M CHIP EL...
  • Page 34 LZ-702IR PARTS LIST 3 7 63 1515 0 VIDEO UNIT (X35-4640-62) Desti- Desti- Ref. No. Parts No. Description Ref. No. Parts No. Description nation nation R147 RN73GH1J302D CHIP R 3.0K D 1/16W R322 RK73HB1J101J CHIP R J 1/16W R149 RK73HB1J105J CHIP R 1.0M...
  • Page 35 LZ-702IR PARTS LIST 3 7 63 1515 0 VIDEO UNIT (X35-4640-62) Desti- Desti- Ref. No. Parts No. Description Ref. No. Parts No. Description nation nation R537 RK73GB2A563J CHIP R J 1/10W D902,903 DA204U DIODE R538,539 RK73EB2E471J CHIP R J 1/4W D904,905 STZ6.2N...

  • Page 36: Specifications

    Hideaway unit ..........380g (0.8lbs) Color system ............NTSC/PAL External video input level (RCA jacks) ..1±0.1Vp-p/75Ω KENWOOD follows a policy of continuous advancements in devel- External audio input level (RCA jacks) ....1V/55kΩ opment. For this reason specifications may be changed without Video output level (RCA jacks) .....

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