Hitachi 32LD7200 User manual

CAUTION:
Before servicing this chassis, it is important that the service technician read the “Safety
Precautions”and“ProductSafetyNotices”inthisservicemanual.
ATTENTION:
Avant d’effectuer l’entretien du châassis, le technicien doit lire les «Précautions de sécurité»
etles«Noticesdesécuritéduproduit»présentésdansleprésentmanuel.
VORSICHT:
Vor Öffnen des Gehäuses hat der Service-Ingenieur die „Sicherheitshinweise“ und „Hinweise
zurProduktsicherheit“indiesemWartungshandbuchzulesen.
SERVICE MANUAL
MANUEL D'ENTRETIEN
WARTUNGSHANDBUCH
Data contained within this Service
manual is subject to alteration for
improvement.
Les données fournies dans le présent
manuel d’entretien peuvent faire l’objet
de modifications en vue de perfectionner
leproduit.
Die in diesem Wartungshandbuch
enthaltenen Spezifikationen können sich
zwecksVerbesserungenändern.
SPECIFICATIONSAND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT
Colour Television
March 2005
No. 0207
32LD7200

1
32LD7200 (PW2L)
CAUTION FOR SAFETY
Please read this page before repair the monitor.
This page explains to following items for keep the safety of set and prevent to accident during
repair work.
We explain by symbol at happen the damage or injury when took wrong repair.
Warning This symbol means "possible to die or heavy damage"
Caution This symbol means "possible to damage or something will break"
We made the symbol as below, which are kind of following items.
This symbol means "CAUTION"
This symbol means "POSSIBLE to
ELECTRIC SHOCK"
This symbol means "MUST"
This symbol means "DO NOT"
Should be follows to instructions.
We indicates to cabinet, chassis and parts
by label, which are special attention part.
Please follow to note and [Safety Instructions]
of User’s Manual.
Prevent the electric shock.
Please take care during working because
monitor has high voltage part and power
supply part.
Possible to die if you tough to these place
by miss take.
Please disconnect power plug during
overhaul, reassemble or change parts.
You will die or take damage by electric
shock if you touch to live part.
Use recommended components.
Please use to same characteristic compo-
nent, which is same as previous for your
safety and keep reliability especially marked
by in parts list and circuit diagram.
It is reason of electric shock or fire if you
use non-recommended component.
Should be kept same style of wiring or component.
Monitor uses tubes or tapes, which made
by insulator, and some components are
keep distance from surface of PWB for
safety.
Internal leads kept from hot part or high voltage
part by clamper or styling, so please return to
original condition for prevent to electric shock
or fire.
Should be done safety check after finished.
Every part (removed screws, component
and wiring) should be returned to previous
condition.
Check around repair position for make
damage by miss take and measure the
insulated impedance by meg-ohm meter.
Confirm the value of impedance, that
value is more than 4M ohm.
It is reason for electric shock or fire if that
value is less than 4M ohm.
Nobody can check and repair to the code
and combination circuit of HDCP.
Never remove the shield case, which is
assembled to the code and combination
circuit of HDCP.
WARNING

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32LD7200 (PW2L)
PRECAUTIONS
How to clean the LCD screen panel of the monitor
Before cleaning the monitor, turn off the monitor and disconnect the power plug from the power outlet.
To prevent scratching or damaging the LCD screen face, do not knock or rub the surface with sharp or hard
objects. Clean the screen with a soft cloth moistened with warm water and dry with a soft cloth. If it is not
enough, then use a cloth with mild detergent. Do not use harsh or abrasive cleaners.
How to clean the cabinet of the monitor
Use a soft cloth to clean the cabinet and control panel of the monitor. When excessively soiled dilute a neutral
detergent in water, wet and wring out the soft cloth and afterward wipe with a dry soft cloth.
Never use acid/alkaline detergent, alcoholic detergent, abrasive cleaner, powder soap, OA cleaner, car wax,
glass cleaner, etc. especially because they would cause discoloration, scratches or cracks.
1. Features
Large-screen, high-definition LCD display panel
The 32-inch LCD display panel, with a resolution of 1366 (H) x 768 (V) pixels, creates a high-definition, large-
screen(aspect ratio : 16:9) and low-profile flat display. Free from electromagnetic interferences from geomagnetic
sources and ambient power lines, the panel produces high-quality display images free from color misconvergence
and display distortion.
High Performance Digital Processor
A wide range of input signals can be handed,including composite, component,and HDMI.High Definition Digital Pro-
cessor creates the fine-textured image with dynamic contrast. In addition, it corresponds to a broad array of per-
sonal computer signals, from 640 x 400 and 640 x 480 VGA to 1600 x 1200 UXGA.(Analog Input)
Easy-to-use remote control and on screen display system
The remote control included eases the work of setting display controls. Further, the on-screen display system,
displays the status of signal reception and display control settings in an easy-to-view fashion.
Connecting to an Audio Visual Device
• Three SCART terminals, a composite/S Terminal*1, a component terminal*2, a HDMI terminal have been added.
A composite video output terminal is also provided as a monitoring output.
*1 A composite/S terminal = A side input
• A wide range of devices other than personal computers can also be connected.
• A RGB input is possible to switch to component signal from the Menu screen.
Power Swivel Feature
It allows to turn the LCD display left or right within ± 30 degree using the remote control.

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32LD7200 (PW2L)
2. Specifications
Panel
Ambient
conditions
Power supply
Power consumption/at standby
Audio output
(RGB input)
Input terminals
Input terminals
Input terminals
RF Video System
Input signals
Input signals
Sync signals
(RF input)
(Video input)
Output Signal
Temperature
Relative humidity
Net dimensions
(excluding Speakers/Stand)
Net weight
(excluding Speakers/Stand)
Resolution
Display
dimensions
Operating : 5˚C to 35˚C, Storage : 0˚C to 40˚C
Operating : 20% to 80%, Storage : 20% to 90% (non-condensing)
AC100 - 240V, 50/60Hz
RGB1 DVI input terminal (DVI-D)
RGB1 audio input terminal (3.5mm Stereo Mini Jack)
RGB2 analog RGB input terminal (D-sub 15-pin)
RGB2 audio input terminal (3.5mm Stereo Mini Jack)
0.7 V/1.0 Vp-p, analog RGB (Recommended Signal)
480i, 576i, 480p, 576p, 1080i/50, 1080i/60, 720p/50*1, 720p/60
H/V separate, TTL level [2KΩ]
H/V composite, TTL level [2KΩ]
Sync on green, 0.3 Vp-p [75 Ω]
ANT : 75Ω Unbalanced
PAL B, G, H / I / D, K
SECAM B, G / K1 / L, L’ / (D, K)*2
OUTPUT (MONITOR): composite video monitor-output terminal (RCA)
OUTPUT (MONITOR): L/R audio monitor- output terminal (RCA)
OUTPUT (HEADPHONE): L/R audio monitor- output terminal (3.5mm Stereo Mini Jack)
1015 (W) x 618 (H) x 340 (D) mm
1366(H) x 768 (V) pixels
Approx. 32 inches (698 (H) x 392 (V) mm, diagonal 800mm)
25.0kg
158W / <1W ; <2W (When DVI)
speaker 12W + 12W (6Ω)
AV1: composite video/S video/L/R audio input terminal (SCART)
AV2: composite video/RGB/L/R audio input terminal (SCART)
AV3: composite video/RGB/L/R audio input terminal (SCART)
AV4: composite video/Y/PB/PRvideo/L/R audio input terminal (RCA)
AV5: composite video/S video/L/R audio input terminal (RCA)
AV6: HDMI input terminal
AV1: PAL, SECAM, NTSC3.58, NTSC4.43
AV2: PAL, SECAM, NTSC3.58, NTSC4.43, RGB
AV3: PAL, SECAM, NTSC3.58, NTSC4.43, RGB
AV4: PAL, SECAM, NTSC3.58, NTSC4.43
AV4: 480i, 576i, 480p, 576p, 720p/50, 720p/60, 1080i/50, 1080i/60,
AV5: PAL, SECAM, NTSC3.58, NTSC4.43
AV6: HDMI input signal
Applicable video signals for each input terminal
Terminal RCA/S-video/SCART DVI D-sub
Signal CVBS S-video Component SCART (RGB) PC STB RGB Component
AV1
AV2
AV3
AV4
AV5
AV6
( :Available)
HDMI
RGB1
RGB2
*1720/50 is supported by RGB1(DVI-STB)
*2The SECAM D,K system might not be normally received, depending on the model.

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32LD7200 (PW2L)
3. Service points
Lead free solder
This product uses lead free solder (unleaded) to help preserve the environment. Please read these instructions
before attempting any soldering work.
Caution: Always wear safety glasses to prevent fumes or molten solder from getting into the eyes. Lead free
solder can splatter at high temperatures (600˚C).
Lead free solder indicator
Printed circuit boards using lead free solder are engraved with an "F."
Properties of lead free solder
The melting point of lead free solder is 40-50˚C higher than leaded solder.
Servicing solder
Solder with an alloy composition of Sn-3.0Ag-0.5Cu or Sn-0.7Cu is recommended.
Although servicing with leaded solder is possible, there are a few precautions that have to be taken. (Not taking
these precautions may cause the solder to not harden properly, and lead to consequent malfunctions.)
Precautions when using leaded solder
Remove all lead free solder from soldered joints when replacing components.
If leaded solder should be added to existing lead free joints, mix in the leaded solder thoroughly after the lead
free solder has been completely melted (do not apply the soldering iron without solder).
Servicing soldering iron
A soldering iron with a temperature setting capability (temperature control function) is recommended.
The melting point of lead free solder is higher than leaded solder. Use a soldering iron that maintains a high
stable temperature (large heat capacity), and that allows temperature adjustment according to the part being
serviced, to avoid poor servicing performance.
Recommended soldering iron:
Soldering iron with temperature control function (temperature range: 320-450˚C)
Recommended temperature range per part:
Part Soldering iron temperature
Mounting (chips) on mounted PCB 320˚C±30˚C
Mounting (chips) on empty PCB 380˚C±30˚C
Chassis, metallic shield, etc. 420˚C±30˚C
SW PWB, LED/RECEIVER PWB, SP TERMINAL(L/R) PWB, SUB POWER PWB,
MAIN POWER PWB
AUDIO PWB, JOINT PWB, Swievel PWB, HDMI PWB, control PWB
VIDEO PWB
TUNER PWB
The PWB assembly which has used lead free solder

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32LD7200 (PW2L)
4. Component names
[Main unit]
[Remote control]
POWER button
INPUT SELECT buttons
MENU button
OK button
SOUND MODE button
VOLUME UP/DOWN button
PROGRAM SELECT buttons
(TV)
MULTI MODE button
RECALL button
FUNCTION SELECT button
DVD CONTROL buttons
FREEZE/RETURN button
SELECT/ADJUST button
PICTURE MODE button
CH I/CH II button (TV)
CHANNEL UP/DOWN button (TV)
MUTE button
MULTI PICTURE button
SWIVEL button
T/TEXT button
(TV)
Control panel
• ( ) indicates the function while the MENU is displayed on the screen.
SUB-POWER button
VOLUME UP/DOWN buttons
(ADJUST buttons)
CHANNEL UP/DOWN buttons
( SELECT buttons)
MENU button
INPUT SELECT button
(OK button)
Remote-control receiver
Indicating lamp
• The main power switch is located on the top.
Main power switch
• Adjustment buttons are located
on the top.
Front
Rear
CLE-960

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32LD7200 (PW2L)
5. New adoption technology
[System control micom I001(M3062)]
Pin function table
No. PIN name I/O
1VREF (+5.0V) I
2+5.0V I
3NC I/O
4OSD_DATA I/O
5OSD_CLK I/O
6HP_VOL I/O
7FE.AGC_O(M) I/O
8 DATA_OUT(FC) I/O
9 DATA_IN(FC) I/O
10 CLK(FC) I/O
11 EDID_PROTECT I/O
12 TRAP_MAIN I/O
13 GND I
14 CNVSS(FLASH) I
15 DSUB COMP I/O
16 RGBSW I/O
17 RESET I
18 16MHz oscillation O
19 GND I
20 16MHz oscillation I
21 +5.0V I
22 NMI(+5.0V) I
23 RMCON(AVC) I/O
24 V.FREQ_2(VIDEO) I/O
25 V.FREQ_1/3 I/O
26 SCV.SYNC I/O
27 IRQ䋨PM-IRQ) I/O
28 MCV.SYNC I/O
29 POWER_LED I/O
30 H.FREQ_2(VIDEO) I/O
31 PDP_WVGA_LCD_SW_2 I/O
32 H.FREQ_1/_3 I/O
33 PDWN I/O
34 RXD2 I/O
35 TXD2 I/O
36 TXD1(RS232C/FLASH) I/O
37 I
38 RXD1(RS232C/FLASH) I/O
39 I
40 SCLK(FLASH) I/O
41 BUSY(FLASH) I/O
42 TXD0(PDP) I/O
43 RXD0(PDP) I/O
44 SDA4(panel) I/O
45 SCL4(panel) I/O
46 M_ENABLE I/O
47 M_SCLK I/O
48 M_SDA I/O
49 M_WAKEUP I/O
50 PDPGO(PM_ON) I/O
5V
NC
OSD DATA
OSD CLK
GND
CNVSS(FLASH)
TRAP-MAIN
FUNCTION
5V
Head Phone Volume
Memory Protect
AGC Voltage(F/E)
FC DATA
FC CLOCK
FC DATA
SYNC-SW
SYNC-SW
RESET
OSC-OUT
GND
OSC-IN
5V
5V PULL UP
IR Signal
TA1370(LA7213), COMPONENT2
TA1370(LA7213), COMPONENT(Main)/ DSUB COMPONENT
CVBS for SYNC Detection(Sub Picture)
CVBS for SYNC Detection(Main Picture)
L䋺LED ON(Power Save)
TA1370(LA7213), COMPONENT2
PDP/42WVGA/LCD detection
TA1370(LA7213), COMPONENT1(Main), D-SUB
RESERVE(LVDS Power Down mode(PANEL))
DTT
DATA(RS-232C)
5V
DATA(RS-232C)
DTT
GND
CLOCK(FRASH MEMORY Writing)
BUSY(FRASH MEMORY Writing)
I2C-BUS Contorol DATA
Ether Net
Ether Net
I2C-BUS Contorol CLOCK
Media Enable
Media Clock
Media Data
Media Wakeup
PDP PALEL Contorol
PANEL MODULE Condition(L:Normal,H:Error)

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32LD7200 (PW2L)
No. PIN name I/O FUNCTION
51 CPUGO(PM_CPU) I/O
52 EPM (FLASH) I/O
53 VIDEO.DET_1 I/O
54 SCL1 I/O
55 SDA1 I/O
56 HDMI-RESET I/O
57 HDMI-HPD_RESET I/O
58 VIDEO.DET_2 I/O
59 VIDEO.DET_3 I/O
60 TUNER.DET_1 I/O
61 CE (FLASH) I/O
62 STAND.CIR_DET I/O
63 SW_L_OUT I/O
64 SW_R_OUT I/O
65 M_SW I/O
66 INITIALIZE I/O
67 D.RESET(DARST) I/O
68 DVI-PD I/O
69 SCDT I/O
70 HS-DJTR I/O
71 DVI-SW I/O
72 CUR_PRTCT I/O
73 SPRLY I/O
74 MUTE I/O
75 ASEL1 I/O AUDIO Signal SW
76 ASEL2 I/O AUDIO Signal SW
77 SDA2 I/O
78 SCL2 I/O
79 D-SUB COMP_SYNC.SW I/O
80 BM_SW I/O
81 RGB_BLK_2 I/O NC
82 RGB_BLK_3 I/O NC
83 AUD RST I/O
84 PDP_WVGA_LCD_SW_1 I/O
85 +5.0V I
86 RGB1_DET I/O NC
87 GND I
88 WSS_1I/ONC
89 WSS_2 I/O NC
90 WSS_3 I/O NC
91 TV.AFC(S) I/O AFC Voltage(Sub TUNER)
92 TV.AFC(M) I/O
93 FE_AGC_I(M) I/O AGC Voltage(Main TUNER)
94 FE_AGC_I(S) I/O
95 HP_DETECT I/O
96 HDMI_DET I/O
97 INT_HDMI I/O
98 NC I/O NC
99 COMP_SW I/O
100 DEMP_OUT I/O
PDP PALEL Contorol
FRASH MEMORY Writing
Detecting VIDEO PWB
I2C䋨to PWB TUNER side䋩FE/MSP3455or MSP3415G/SAA5361/TB1274(Sub)/M306V7/M62320P
I2C䋨to PWB TUNER side䋩FE/MSP3455or MSP3415G/SAA5361/TB1274(Sub)/M306V7/M62320P
HDMI-Reset
Hot Plug Detect Reset
Detecting VIDEO PWB
Detecting VIDEO PWB
Detecting TUNER PWB
FRASH MEMORY Writing
Detecting SWIVEL PWB
SWIVEL(L-output)
SWIVEL(R-output)
Discriminate terminal of bridge media circuit connecting.
Initializing EEPROM
RESET(DVI)
DVI Contorol
DVI Contorol
DVI Contorol
DVI Contorol
SP ON/OFF Relay Control
MUTE
GND
I2C(NJW1163,AD7414,TA1370)
I2C(NJW1163,AD7414,TA1370)
SYNC-SW
PDP/42WVGA/LCD detection
RESET for LIPSYNC IC
BM switch
AFC Voltage(Main TUNER)
HEAD PHONE DETECT
HDMI 5V DET
AFC Voltage(Sub TUNER)
INT(HDMI)
Component SW Main 㹤DSUB
Detecting Power-SWIVEL
de-emphasis control output for HDMI

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32LD7200 (PW2L)
No. PIN name I/O FUNCTION
101 CONTROL I/O
102 SCL0 I/O
103 SDA0 I/O
104 SCL3(EEPROM) I/O
105 SDA3(EEPROM) I/O
106 HDMI_CIR_DET I/O
107 EXT_RESET I/O
108 OSD_CS I/O
109 FC_ENABLE I/O
110 NC I/O
111 NC I/O
112 IRQ_DTT I/O
113 DTT_POWER I/O
114 DISPEN I/O
115 HDMI_A_SW I/O
116 SCL5 I/O
117 SDA5 I/O
118 FUNC_1 I/O
119 FUNC_2 I/O
120NC I/O NC
121 AD_KEY3 I/O
122 AD_KEY2 I/O
123 AD_KEY1 I/O
124 TV.POWER I/O
125 DIP.DET I/O
126 POWER_SAVE I/O
127 GND I
128 I/O
Function 1
Function 2
LCD PANEL
I2C-BUS Contorol CLOCK
I2C-BUS Contorol DATA
I2C-BUS Contorol CLOCK
I2C-BUS Contorol DATA
Detecting HDMI circuit connection
OSD CS
FC ENABLE
NC
EXTERNAL RESET
FAN ALARM
AD KEY1(INPUT)
POWRE ON/OFF(H:ON䇮L:STANDBY)
DIP DET
NC
HDMI AUDIO SW
GND
DTT IRQ
DTT POWER
DISPEN
I2C-BUS Contorol CLOCK
I2C-BUS Contorol DATA
AD KEY3
AD KEY2
FAN_ALARM
POWER ON/OFF(L䋺ON(STANDBY䍃POWER SAVE), H䋺OFF)

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32LD7200 (PW2L)
Block diagram