Hitachi CP-S235W Service Manual

SM0541

CP-S235W(C10SM2)

SERVICE MANUAL

Warning

The technical information and parts shown in this manual are not to be used for the development, design, production, storage or use of nuclear, chemical, biological or missile weapons or other weapons of mass destruction; or military purposes; or purposes that endanger global safety and peace. Moreover, do not sell, give or export these items or grant permission for use to parties with such objectives. Forward all inquiries to Hitachi Ltd.

Caution

Be sure to read this manual before servicing. To assure safety from ﬁ re, electric shock, injury, harmful radi-

ation and materials, various measures are provided in this Hitachi Multimedia LCD Projector. Be sure to

read cautionary items described in the manual to maintain safety before servicing.

Service Warning

1. When replacing the lamp, avoid burns to your ﬁ ngers. The lamp becomes very hot.

2. Never touch the lamp bulb with a ﬁ nger or anything else. Never drop it or give it a shock. This may

cause bursting of the bulb.

3. This projector is provided with a high voltage circuit for the lamp. Do not touch the electric parts of

power unit (main) when the projector is turned on.

4. Do not touch the exhaust fan during operation.

5. The LCD module assembly is easily damaged. When replacing the LCD LENS/PRISM assembly, do

not hold the FPC of the LCD module assembly.

6. Use only the cables included with the projector or specified.

Contents

1. Features --------------------------------------------------- 2

2. Speciﬁ cations --------------------------------------------- 2

3. Part names ------------------------------------------------ 3

4. Adjustment ----------------------------------------------- 5

5. Troubleshooting ----------------------------------------11

6. Service notes -------------------------------------------- 16

7. Wiring diagram ----------------------------------------- 30

8. Assembly diagram-------------------------------------- 35

9. Replacement parts list ------------------------------- 38

10.RS-232C communication --------------------------- 39

11.Block diagram ------------------------------------------ 47

12.Connector connection diagram ----------------- 48

13.Basic circuit diagrams -------------------------------- 49

SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT.

Multimedia LCD Projector

March 2004 Digital Media Division

1. Features

Ultra high brightness

Whisper mode equipped

User memory function

Partial magnification function

Keystone distortion correction

2. Specifications

CP-S235 (C10SM2)

Liquid

Crystal

Panel

Video Input System NTSC, PAL (BGDHI), SECAM, PAL-M, PAL-N, NTSC4.43, PAL60

RGB input /

output

Drive system TFT active matrix

Panel size 1.4cm (0.55type)

Number of pixels 800 (H) × 600 (V)

Lamp 160W UHB

Level Composite 1.0 ±0.1Vp-p (75Ω termination)

S-Video Y : 1.0 ±0.1Vp-p (75Ω termination)

C : 0.286 ±0.1Vp-p (NTSC burst signal,75Ω termination)

0.3 ±0.1Vp-p

Component Y: 1.0 ±0.1Vp-p (75Ω termination)

Analog RGB 0.7Vp-p (75Ω termination)

Sync. TTL level

Audio Input 200mVrms, 50KΩ

Speaker output 1.0W (mono)

Power supply 100~120VAC / 2.6A, 220~240VAC / 1.4A

Power consumption 240W

Dimensions 332(W) × 92(H) × 254(D) mm (No including protruding parts)

Weight 3.0Kg

Temperature Operation : 0~35°C Storage : -20~60°C

Accessories Remote control transmitter × 1

RGB cable × 1

(Power cord)

Strap for lens cap × 1

Rivet for lens cap × 1

: 0.7 ±0.1Vp-p (75Ω termination)

B/PB

: 0.7 ±0.1Vp-p (75Ω termination)

R/PR

(PAL/SECAM burst signal,75Ω termination)

Battery × 2

Soft case × 1

User's manual operating guide (Book × 2 or CD-ROM × 1)

User's manual quick guide (Book× 1)

User's manual safety guide (Book× 1)

3. Part names

Projector

Zoom ring

Focus ring

Lens

(The picture is

projected from

here.)

CP-S235 (C10SM2)

Air filter cover

(An air filter is inside.)

Remote sensor

Elevator button

Elevator feet

Lens cap

Projector (Front/Right)

INPUT button

toggles between the signal ports.

RGB VIDEO

S-VIDEO

COMPONENT VIDEO

STANDBY/ON button

prepares for turning the power on/off. Refer to the section “Power ON/OFF”.

AUDIO R port

(from a video equipment)

S-VIDEO port

AUDIO OUT port

AUDIO IN port

(from a computer)

VIDEO port

POWER indicator

tells the state of power supply. Refer to the section “Power ON/OFF”.

POWER

STANDBY/ON

INPUT

L port

TEMP indicator

lights or blinks when any problem about internal temperature has happened.

LAMP indicator

lights or blinks when any

TEMP

LAMP

problem about the lamp has happened.

MENU buttons

operate the menu function.

IN

RGB OUT port

COMPONENT VIDEO - Y

COMPONENT VIDEO - CB/PB

COMPONENT VIDEO - CR/PR

USB port

RGB IN port

Power switch

AC inlet

CONTROL port

Projector (Rear/Left)

RGB button

selects the input signal of RGB port.

VIDEO button

toggles between the signal ports of VIDEO, S-VIDEO and COMPONENT VIDEO.

ASPECT button

toggles between the modes for aspect ratio.

MAGNIFY ON/OFF buttons

turns on/off the MAGNIFY mode. In the MAGNIFY mode,

To move the magnified area,

(1) Press the POSITION button. (2) Use the cursor buttons to move the picture. (3) Press the POSITION button again to finish.

To shift the magnify level,

use the cursor

buttons.

FREEZE button

freezes/reactivates the picture.

POSITION button

turns on/off the POSITION mode. (for RGB input) In the POSITION mode,

To move the picture,

use the cursor buttons.

ESC button

returns to the previous display at the menu functions. (Available for

operating PC screen)

CP-S235 (C10SM2)

SEARCH button

searches for an input signal between the following signal ports of RGB, VIDEO, S-VIDEO and COMPONENT VIDEO.

RGB

VIDEO

ASPECT

MAGNIFY

OFF

ESC RESET

proceeds to the next operation at the menu functions. (Available for operating PC screen)

works for adjusting or menu controlling. (Available for

AUTO BLANK

PAGE DOWN

VOLUME

MUTE

KEYSTONEFREEZE

MENUPOSITION

HOME PAGE UP

END

ENTER

ENTER button

,,,

(Cursor) buttons

operating PC screen)

(STANDBY/ON)

button

prepares for turning the power on/off.

AUTO button

executes automatic adjustment.

BLANK button

blanks the screen temporarily.

VOLUME button

turns on/off the VOLUME mode. In the VOLUME mode,

To adjust the volume,

use the cursor

buttons.

KEYBOARD button

operate the PC screen.

MUTE button

mutes/restores the sound.

KEYSTONE button

turns on/off the KEYSTONE mode. In the KEYSTONE mode,

To adjust the keystone,

use the cursor

buttons.

MENU button

opens/closes the menu.

RESET button

cancels the adjustment in progress. * The adjustments of the volume etc. are not reset.

Remote control transmitter

CP-S235 (C10SM2)

4. Adjustment

4-1 Before adjusting

4-1-1 Selection of adjustment

When any parts in the table 4-1 are changed, choose

the proper adjusting items with the chart.

4-1-2 Setting of condition before adjustment

1. Before starting adjustment, warm up the projector

for about 10 minutes. (Blank white)

2. Set Zoom Wide to Max. And project an image

with more than 1m (40 type) in diagonal size.

3. Normalising the video adjustment.

(Press the [MENU] button of the Remote control

transmitter to display the MAIN menu. After

pressing the [

select [RESET]. Next, open MAIN menu and

press the [

menu. Choose RESET and perfom EXECUTE by

the same operation described above.

*note :The MAIN and PICTURE1 menu is not

reset with no signal.

] key, use the [ ] or [ ] key to

] key to display the PICTURE1

Table 4-1: Relation between the replaced part and adjustment

Replaced

part

Dichroic

optics unit

LCD/LENS

prism

assembly

Main Board

Lamp

unit

assembly

Sensor

Board

Ghost

(Chap.4-2)

Flicker

(Chap.4-3)

: means need for adjustment.

: means recommended.

Adjustment

NRSH

(Chap.4-4)

White

balance

(Chap.4-5)

: means not need for adjustment.

Colour

uniformity

(Chap.4-6)

AIR

SENSOR

(Chap.4-7)

4. Set the NORMAL at GAMMA in the PICTURE1

menu.

Perform all adjustments from the FACTORY MENU.

Perform the following operations to display the

FACTORY MENU.

Press the [MENU] button on the Remote control

transmitter (the MAIN menu will appear).

b. Select the [RESET] in the MAIN menu, and

then press the [ ] button.

c. Next, press the [RESET] button one time. And

hold the [RESET] button for 3 seconds or

more (the

FACTORY MENU

will appear).

4-2 Ghost adjustment

Signals for internal adjustment

30%

0/255

112/255

Adjustment procedure

Use DAC-P - GHOST - R: in the FACTORY MENU

to adjust so that R colour ghost is at a minimum.

(Set the adjustment value to default, and then

raise the value. When a ghost appears to the left

of a vertical line, reduce the value by 4 steps.)

2. In the same way, use DAC-P - GHOST-G: in the

FACTORY MENU to adjust so that G colour ghost

is at a minimum.

3. In the same way, use DAC-P - GHOST-B: in the

FACTORY MENU to adjust so that B colour ghost

is at a minimum.

CP-S235 (C10SM2)

4-3 Flicker adjustment

(V.COM adjustment)

Signals for internal adjustment

4-4

NRSH adjustment (vertical stripe adjustment)

Signals for internal adjustment

160

/255

136

/255

112

/255

64/255

88/255

112/255

136/255

/255

Adjustment procedure

1. Make this adjustment after completing the adjustment in 4-2 Ghost adjustment.

2. Use DAC-P - V.COM - R: in the FACTORY MENU to adjust so that the flicker at the centre of the screen is less than the flicker at the periphery. (When the flicker is about the same across the whole screen, adjust so that the flicker at the centre of the screen is somewhat less than elsewhere.)

3. In the same way, use DAC-P - V.COM-G: in the FACTORY MENU to adjust the G colour flicker.

4. In the same way, use DAC-P - V.COM-B: in the FACTORY MENU to adjust the B colour flicker.

Adjustment procedure

1. Either of adjustment patterns as shown on the left appears, which depends on the firmware version. If any other pattern is displayed, press the [ENTER] key on the remote control.

Use the DAC-P - NRSH - R: in the FACTORY MENU to adjust so that the vertical stripes with one pixel width every 6 pixels are as inconspicuous as possible. (Note that when the adjustment value is lowered, stripes with 6 pixels width every 12 pixels may appear on the right side of the darkest or the 2nd darkest tone. Should this happen, make as inconspicuous stripes as possible on the whole screen.)

In the same way, use DAC-P - NRSH - G: in the FACTORY MENU to adjust vertical stripes of G colour.

160/255

4-5

White balance adjustment

(visual inspection)

Preparations

1. Perform these adjustments after the NRSH adjustment described in Section 4-4.

Adjustment procedure

1. First, adjust the G colour. Select GAMMA, SUB-CNT, and G: in the FACTORY

2. MENU. If the background is white solid, press the [ENTER] key on the Remote control transmitter to change to [G] monochrome in the 29-tone greyscale.

Adjust GAMMA, SUB-CNT, and G: in the FACTORY MENU so that brightness of 29 steps is best.

4. Don’t adjust GAMMA, SUB-BRT, and G: in the FACTORY MENU. Because we want to keep the best contrast ratio.

5. Then adjust colours R and B.

2. Reset gamma correction before adjustment. Place the cursor on [GAMMA] in the FACTORY MENU, press the [RESET] key and select [DEFAULT].

Select GAMMA, SUB-CNT, and G: in the FACTORY

MENU. If the background is white solid, press the [ENTER] key on the Remote control trasmitter to change to [W] monochrome in the 29-tone greyscale.

7. Adjust GAMMA, SUB-BRT, R: and B: in the

FACTORY MENU so that low-brigtness white balance is best.

Adjust GAMMA, SUB-CNT, R: and B: in the FACTORY MENU so that middle-brightness white balance is best.

9. Repeat steps 7 to 8 above, and adjust so that

brightness white balance of 29 steps is best.

CP-S235 (C10SM2)

4-6 Colour uniformity adjustment

Preparations

1. Perform these adjustments after the white

balance adjustment described in Section 4-5.

2. Make a colour uniformity adjustment for the

following four tones.

MIN tone (approx. 3% input signal)

MID-L tone (approx. 13% input signal)

MID-H tone (approx. 22% input signal)

MAX tone (approx. 50% input signal)

3. Place the cursor on [C.UNIF.] in the FACTORY

MENU and press the [ ] key. This displays the

Adjust Tone menu at the bottom of the screen.

To choose the tone to be adjusted, press the [

key and then use the [ ] or [ ] key.

Select the major adjustment lattice point No. and

color, and then adjust them.

4. The major adjustment lattice point numbers (a

total of 17 points) corresponds to the major

adjustment lattice point positions in the diagram

on the right. The colour uniformity of the entire

screen can be adjusted by adjusting the white

balance for each of the points starting in order

from the low numbers.

5. Adjustment point No.1 should not be adjusted,

because it controls the brightness of the entire

screen.

]

6. To temporarily turn correction off, place the cursor

on [C.UNIF.] in the Adjust Tone menu and press the

] key. The ON/OFF menu appears. Place the

[

cursor on [ON] with the [ ] key and press the [ ]

key. To turn it on again, place the cursor on [OFF]

and press the [

] key.

7. Although this adjustment can also be made using

internal signals, we will here use the [ENTER] key

on the Remote control transmitter to select the

following two signals.

Solid monochrome adjustment colour (use G

colour adjustment when a colour differential meter

is used).

Solid white (use for adjustment other than

above).

8. Reset colour-shading correction before adjustment.

When 4 tones and all colours are to be reset,

place the cursor on [C.UNIF.] in the FACTORY

MENU, press the [RESET] key and select

[DEFAULT].

When only 1 tone is to be reset, place the

cursor on the tone to be reset, press the

[RESET] key and select [DEFAULT].

Single tone and monochrome resets cannot be

performed.

FACTORY MENU

VID-AD

C. UNIF.

DAC-P GAMMA STRIPE

Adjust tone menu

C.UNIF

ON/OFF ON

MIN

MID-L

MID-H

MAX

OFF

No. 1 R 0

Major adjustment lattice point No.

G0 B0

Major adjustment lattice point position

14 12

6 4 8

H/6 H/3 H/3 H/6

10 11

15 17

2 1 3

7 5 9

V/6

V/3

V/6

CP-S235 (C10SM2)

Adjustment procedure 1

(when a colour differential meter is used)

1. First adjust [MID-L] tone [G:].

2. Select adjustment point [No.2][G:].

When the background is not [G] monochrome,

press the [ENTER] key on the Remote control

transmitter to change to solid [G] monochrome.

3. Measure the illumination at adjustment points No.

2, No.3, No.10 and No.11.

The values should be:

No.2 = Y2 [lx] No.10 = Y10 [lx]

No.3 = Y3 [lx] No.11 = Y11 [lx]

4. No.2 and No.3 adjustment point have the average

of Y2 and Y3.

Y2 = ( Y2 + Y3 ) / 2 ±2 [%]

Y3 = ( Y2 + Y3 ) / 2 ±2 [%]

5. No.10 and No.11 adjustment point have the

average of Y10 and Y11.

Y10 = ( Y10 + Y11 ) / 2 ±2 [%]

Y11 = ( Y10 + Y11 ) / 2 ±2 [%]

6. Then adjust [MID-L] tone [R] and [B].

When the background is [G] monochrome, press

the [ENTER] key on the Remote control

transmitter to change to solid white.

7. Measure the colour co-ordinates of adjustment

point [No.1] and make a note of them.

Assume that they are x = x1, y = y1.

Note: When the CL-100 colour and colour

difference meter is used, the [

mode is convenient. When adjustment

point [No.1] colour co-ordinate has been

selected, set the slide switch on the side to

[

](delta) while holding down the [F] button

on the front panel. The measurement

shown after this displays the deviation from

measurement point 1.

8. Measure the colour co-ordinates of measurement

point [No.2] and adjust [No.2][R:] and [B:] so that

the co-ordinates are as follows.

x = x1 ± 0.005 , y = y1 ± 0.010

](delta)

9. Similarly, measure adjustment points [No.3] to

[No.17] and adjust their colour co-ordinates starting

in order from the small number points.

This completes adjustments required for [MIN].

Note: Since excessive correction may lead to a

correction data overview during internal

calculations, use the following values for

reference.

[No.2] to [No.5] ±40 or less

[No.6] to [No.9] ±50 or less

[No.10] to [No.13] ±70 or less

[No.14] to [No.17] ±120 or less

10. Then adjust [MIN] tone [G] so that the adjustment

data set two times as much as [MID-L] tone [G].

This completes [G] colour adjustments.

11. Then adjust [MIN] tone [R] and [B].

Select [No.2] [B:] and press the [ENTER] key on

the Remote control transmitter to change to solid

white.

12. Measure the colour co-ordinates of adjustment

point [No.1] and make a note of them.

Assume that they are x = x1, y = y1.

13. Now measure the colour co-ordinates of

measurement point [No.2] and adjust [No.2][R:]

and [B:] so that the co-ordinates are as follows.

x = x1 ±0.005 , y = y1 ±0.010 (Target)

x = x1 ±0.020 , y = y1 ±0.040

14. Similarly, measure adjustment points [No.3] to

[No.17] and adjust their colour co-ordinates starting

in order from the small number points.

This completes [MIN] tone adjustments.

15. Now make similar adjustments for [MID-H] tone.

(Adjust [MID-H] tone [G] so that the adjustment

data set half as many as [MID-L] tone [G].)

16. Now make similar adjustments for [MAX] tone.

(Adjust [MAX] tone [G] so that the adjustment

data set half as many as [MID-L] tone [G].)

CP-S235 (C10SM2)

Adjustment procedure 2

(visual inspection)

1. First adjust [MIN] tone [G:].

2. Select [No.2] [G:].

If the background is [G] monochrome, press the

[ENTER] key on the Remote control transmitter to

change to solid white.

3. View measurement point [No.2] and [No.3].

Lower the [G] colour intensity only of the colour

point whose [G] colour is more intense than

measurement point [No.1].

4. View measurement point [No.10] and [No.11].

Lower the [G] colour intensity only of the colour

point whose [G] colour is more intense than

measurement point [No.1], and raise the intensity

of the point whose colour intensity is lower than

measurement point [No.1].

5. Now adjust the [MIN] tone for colours [R] and [B].

6. View measurement points [No.2], [No.3], [No.10]

and [No.11]. Adjust the [R] and [B] of each

measurement point so that they have the same

color as measurement point [No.1].

Adjustment technique:

First, adjust [B:] of the point whose colour is to be

adjusted so that it approximates that of [No.1]. If

[R:] is low at this time, the image will have cyan

cast, in which case [R:] is increased. On the other

hand, if [R:] is excessive, the image will have a

magenta cast, in which case [R:] is decreased.

Overall, a cyan cast makes it easy to see colour

shading.

7. Next, view measurement points [No.4], [No.5],

[No.12], [No.13] and make similar adjustments.

Then adjust measurement points [No.6], [No.7], [No.8],

[No.9], [No.14], [No.15], [No.16] and [No.17].

This completes the [MIN] tone adjustments.

9. Make similar another three tones as described in

steps 1 to 8 above.

No. 2 deviation range No. 10 deviation range No. 3 deviation range No. 11 deviation range

No. 4 deviation range No. 12 deviation range No. 5 deviation range No. 13 deviation range

No. 6 deviation range No. 7 deviation range No. 8 deviation range No. 9 deviation range

No. 14 deviation range No. 15 deviation range No. 16 deviation range No. 17 deviation range

CP-S235 (C10SM2)

4-7 AIR-SENSOR adjustment

When the MAIN board or the SENSOR board is replaced, perform this adjustment after

completing reassembling the projector.

1. Open SERVICE MENU and choose AIR-SENSOR by using

Service menu comes up by following operation. Set the cursor on the OPTION menu and press the

MAGNIFY OFF button on the Remote controller. Next hold the MAGNIFY OFF button for 3 seconds or more.

2. Press the

automatically.

3. After the massage of "END" is displayed, check the Offset value displayed according to the following spec

Spec. : 150

4. If out of spec, confirm the below conditions Then retry the same adjustment.

(a) Installing the air filter correctly.

(b)

(d) Installing the SENSOR board correctly.

(e) Connecting the proper wires to E7A1 and E981 firmly.

(f) The component I7A2 on the MAIN board stands vertically

(g) The component D981 on the SENSOR board stands vertically

button. Next press the [ ] button to select EXECUTE. The adjustment program runs

Offset: 227

Description

No obstruction and dust on air filter. (If not good condition, clean or replace the air filter.)

button.

5. If the all conditions above is okay, replace the MAIN board.

5. Troubleshooting

Check points

REMC Board

CP-S235 (C10SM2)

E805

P701

E7A1

E301

ESPL

#6430

EA01

EV01

SENSOR Board

#6800

E302

P601

MAIN Board

E102

E802

P501

E803

(POWER)

S301

(P-ON)

E101

CONTROL Board

E801 E804

D841

D302 (TEMP) D301

S302

(INP)

E103

Rear view

E800

D303

(LAMP)

ET01

TSW

ET01

CNCT

EM01

Power cannot be turned on

Are

voltage input

at pins , , , of

5 7

E800 on the MAIN

board at standby

mode?

YES

: +12V

: +17V

:+6.6V

:+4.1V

CP-S235 (C10SM2)

Disconnect

TSW form Power unit

(circuit). And check

TSWshortor

open?

Short

Open

TSW

What is the state of

TEMP indicator D302?

No light

What is the state of

LAMP indicator D303?

No light

MAIN board

Blinks

H (More than 12.6V)

Power unit (circuit)

DC FAN

Jump to * on the page 13

Is the LAMP DOOR

set?

Measure

voltage at the of

E803 on the MAIN

board.

Fuse

on the Filter unit

Set the LAMP DOOR

Filter unit

L(OV)

Limit SW board

Lamp does not light

CP-S235 (C10SM2)

What is the

state of LAMP

indicator D303 during

operation?

No light

Light

Is the LAMP

installation correct?

YES

Change the lamp.

Does lamp light?

Not light

Is the

voltage at the

of E804 on the

MAIN board fixed to "L"

during warming-up?

"L"=0V

Power unit (ballast)

Light

YES

Power unit (circuit)

Install the Lamp

MAIN board

Lamp

DC FAN

(Lamp)

DC FAN

(Panel)

Thermistor A

(#6430)

H (3.3V)

(Fan lock)

Infinity

Blinks

Measure

sure voltage at the

cathode pin of D841 on

of E801 have a amplitude

of 3.3V and a frequency

external air sensor

between and of #6430.

the MAIN board.

L(OV)

Does the

signal at the pin

of 40Hz or

more?

YES

(Normal)

Measure

the resistance of

(at disconnecting

from E302)

about 10k

What is the

state of TEMP indicator

D302?

No light

Is the voltage

at the of E804 on

the MAIN board

set to "L" during

warming-up?

YES

Power unit (ballast)

"L" = 0V

MAIN board

CP-S235 (C10SM2)

Power unit (circuit)

YES

Are

voltage input at

pins , , , of

E800 on the

MAIN board?

:+12V :+17V : +6.6V : +4.1V

MAIN board

LCD module assembly

Check at operating mode

1 3 5

Picture is not displayed when the

VIDEO, S-VIDEO, Component Signal is input

1 3 5

Picture is not displayed

when the RGB signal is input

Check at operating mode

Are

voltage input

at pins , , , of

1 3 5 7

E800 on the MAIN board?

YES

3 5 7

: +12V : +17V :+6.6V :+4.1V

Power unit

(circuit)

MAIN board

LCD panel

CP-S235 (C10SM2)

Speaker

Check at operating mode

No sound

YES

Power unit (circuit)

Are

voltage input

at pin , , ,

of the E800 on the

MAIN board?

71 3 5

MAIN board

Turn off

the projector and

disconnect the Speaker

cable from ESPL.

Measure the resistance

of the Speaker.

: +12V : +17V : +6.6V : +4.1V

1 3 5

about 8

0 or infinity

No control to RS-232C

Check the

RS-232C cable.

Are pin No. 2 and 3

crossed?

YES

Check the

power supply voltage

of E800 the voltage

correct?

YES

MAIN board

Use cross cable

Power unit (circuit)

The check after parts change

1. PC power supply OFF

2. Connection of cable

3. Projector starting

4. PC starting *When not operating :

PC set up change of cable.

CP-S235 (C10SM2)

6. Service notes

6-1 Lead-free solder [CAUTION]

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 ±30˚C

Mounting (chips) on empty PCB 380 ±30˚C

Chassis, metallic shield, etc. 420 ±30˚C

MAIN board

SENSOR board

REMC board

COVER SW board

The boards using lead-free solder

POWER UNIT (BALLAST)

POWER UNIT (CIRCUIT)

FILTER UNIT

CP-S235 (C10SM2)

6-2 Cautions when removing the MAIN board

When removing the MAIN board, there is danger of damaging the connector connecting cables.

1) Disconnect 11 cables and remove 4 screws.

ATTENTION

Handling FPC cable

Be careful not to add strong load, such as pulling or twisting the FPC cable. If load is added to FPC cable, convergence may shift. In case FPC cable is being removing, or when attaching, or when opening a intake LID, or when closing, please carry out carefully and slowly so that load is not added to FPC cable.

4 screws

MAIN Board

2) Remove 2 screw.

2 screw

AC IN

3) Lift the rear of the MAIN board to the front.

FRONT

MAIN Board

Lift

REAR

Disconnect the 2 cables.

6-3 Cautions when removing the power unit (BALLAST)

When removing the cable (CNBAR) connected to Power Unit (BALLAST), there is danger of damaging the small

PCB connecting cables.

Disconnect the CNBAR from connector CN200, while pressing the sub-board

CNBAR

(to prevent the stress on the sub-board).

CN200

T102

CN100

Power Unit (BALLAST)

CP-S235 (C10SM2)

6-4 Before replacing the LCD/Lens prism

You should not separately replace the parts of the liquid crystal LCD/Lens prism because they only work properly

when used together. Therefore, you can either replace the LCD/Lens prism assembly or send the whole

LCD/Lens prism assembly unit back to HITACHI where we will replace the malfunctioning part,

recondition the device and send it back to you.

G Panel

DISTRIBUTOR HITACHI

Do not disassemble the unit because replacement of separate parts is not possible.

Replacement of G Panel Reconditioning

Return

6-5 Cleaning dust from panels and optical filters

1. Preparation

Prepare cleaning tools and materials as follows. Work in a relatively clean room so as to remove

additional dust while in removal operation.

(1) Swab for cleaning •••••• P#: NX08061, "Cotton stick L147"

(2) Air duster (Dust blower, spray can)

(3) Vacuum cleaner

2. Disassemble and open the maintenance hole.

(1) Turn off the projector, and unplug the power cord.

(2) Remove the top cover, according to the disassembling diagram of chapter 8.

(3) Remove the MAIN board, according to the Chapter 6-2.

(4) Remove the intake LID.

ATTENTION

Handling FPC cable

Be careful not to add strong load, such as pulling or twisting the FPC cable. If load is added to FPC cable, Convergence may shift. When the FPC cable is being removed, attached, when opening or closing a intake LID, perform the operation carefully and slowly so that load is not added to FPC cable.

Release two latches

Intake LID

Lift

FPC cable

(5) Re-assemble the MAIN board and re-connect all the connectors.

3. Maintenance point

CP-S235 (C10SM2)

Swab

Holder

Each colour part has same

construction.

Optical filters

Panel

By using swab and air duster,

you can easily remove dust from

panel and optical filters.

Separatied formationActua l formation

ᴾ

4. Cleaning the panels and optical filters

(1) Turn on the set and lit on the lamp.

(2) Set blank screen to black or white.

(3) By using swab and air duster, remove the dust. While cleaning you can check the dust on screen.

Swab

• While removing the dust, separated dust will be

blown off by air cooling system.

Panel

• Please pay attention not to damage panel and

filters.

Holder

Air

Optical filters

5. Re-assembly

(1) Turn off the set and remove the MAIN board.

(2) Set the intake LID.

(3) Re-assemble the MAIN board.

(4) Re-assemble the set.

(5) While re-assembling, clean the intake LID and intake filter and filter cover using a vacuum cleaner.

CP-S235 (C10SM2)

6-5 Putting batteries

CAUTION

Always handle the batteries with care and use them only as directed. Improper use may result in battery cracking or leakage, which could result in fire, injury and/or pollution of the surrounding environment.

• Keep the battery away from children and pets.

•

Be sure to use only the batteries speciﬁ ed for use with the remote control. Do not mix new batteries with used ones.

• When inserting batteries, verify that the plus and minus terminals are aligned correctly (as indicated in the remote control).

• When you dispose the battery, you should obey the law in the relative area or country.

1. Remove the battery cover.

Slide back and remove the cover in the direction of the arrow.

2. Insert the batteries.

Align and insert the two AA batteries according to their plus and minus terminals.

(as indicated in the remote control.)

3. Close the battery cover.

Replace the cover in the direction of the arrow and snap it back into place.

+ 46 hidden pages