hitachi ap1x ap2x train total

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CONTENTS... 1991 A0P-1X AND AP-2X Chassis Projection Television InformationMATERIALS PREPARED BY Alvie Rodgers C.E.T. (Chamblee, GA.)

September 2005 Training Materials Prepared by: ALVIE RODGERS C.E.T.

1991MODEL RELEASE

Chassis Model # AspAP-12 46EX1K 4X3

55EX1K

All Analog Convergence

AP-13 46UX7B 4X3

46UX7K 4X346UX10BA 4X350UX8D 4X3

50UX8W 4X3

50UX7B 4X350UX7K 4X346UX11KA 4X3

All Analog Convergence

AP-14 60SX1K 4X3Dig. Convergence

AP-22 46EX2B 4X3AP-22 46EX2K 4X3AP-22 50EX2K 4X3

AP-23 46UX10BF 4X3AP-23 46UX11KF 4X3

AP-23 50UX10B 4X3AP-23 50UX11K 4X3All Analog Convergence

AP-24 60UX2K 4X3Dig. Convergence

HITACHI

AP-1X and AP-2X CHASSIS

TRAINING


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DP-1Xand DP-2XBLANK PAGE NOTES

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AP-1X and AP-2X TABLE OF CONTENTS

Table of Contents

Materials prepared by

Alvie Rodgers C.E.T.

TOPICS PAGE

Speaker Grill Part Number ------------------------------------------------------------------------------------------- 01-01 Location of Technical Information other than whats in the AP-1X Tech. Info. Manual -------------------- 01-02 Jig for Stand-up Vertical Modules Repair -------------------------------------------------------------------------- 01-04 Information that is wrong in the 50UX7K Service Manual ------------------------------------------------------ 01-05

Power Supply Shutdown Circuit Explanation ---------------------------------------------------------------------- 01-08 Power Supply Shutdown Circuit Diagram -------------------------------------------------------------------------- 01-10

Troubleshooting the Power Supply ---------------------------------------------------------------------------------- 01-11 Troubleshooting the Power Supply Block Diagrams ------------------------------------------------------------- 01-13 Cross Hatch Generator Waveforms and Voltages ----------------------------------------------------------------- 01-18

Conditions under Crisp, Natural and Off --------------------------------------------------------------------------- 01-22 Operation of IC-3005 (S-Switch) Explained ----------------------------------------------------------------------- 01-23 AP-13, 14, 23, 24 Video Signal Path Circuit Diagram ------------------------------------------------------------ 01-24 AP-12 and 22 Video Signal Path Circuit Diagram ----------------------------------------------------------------- 01-24A ABL Circuit Diagram ------------------------------------------------------------------------------------------------- 01-25 Video Mute Out of Microprocessor Pin 18 and 45 Explanation ------------------------------------------------- 01-26

Audio Muted in Demo Mode Info ----------------------------------------------------------------------------------- 01-27

Fix for Rumble Heard in the Audio --------------------------------------------------------------------------------- 01-28 Dynamic Bass Circuit Explanation ---------------------------------------------------------------------------------- 01-31 Dynamic Bass Circuit Diagram -------------------------------------------------------------------------------------- 01-32 Base Synegizer Block Diagram -------------------------------------------------------------------------------------- 01-34

What signals available to Speakers in different Surround Modes ---------------------------------------------- 01-35 Audio Signal Path Block Diagram ----------------------------------------------------------------------------------- 01-36 Surround Switching Block Diagram -------------------------------------------------------------------------------- 01-37 Surround Off Signal Path Block Diagram -------------------------------------------------------------------------- 01-38

Surround Matrix Signal Path Block Diagram ---------------------------------------------------------------------- 01-39

Surround Hall Signal Path Block Diagram ------------------------------------------------------------------------- 01-40

Dolby Pro Logic Setup and Features -------------------------------------------------------------------------------- 01-41 Dolby Pro Logic Block Diagram ------------------------------------------------------------------------------------ 01-42 Dolby Pro Logic Center Channel Block Diagram ----------------------------------------------------------------- 01-43

Difficulty in Performing Convergence Adjustments AP-12 46 & 55EX1B or K ---------------------------- 01-44 Difference between the AP-12, 13 and 14 chassis to the AP-22, 23 and 24 ----------------------------------- 01-45

Spot Killer Circuit Diagram ------------------------------------------------------------------------------------------ 01-50

Tuner, Micro-Processor and Memory Communication ----------------------------------------------------------- 01-51 Dolby Test Sequencer One and Two to Micro Processor Circuit ----------------------------------------------- 01-52 Microprocessor Data Communication Block Diagram ---------------------------------------------------------- 01-53 Sweep Loss Circuit Explanation ------------------------------------------------------------------------------------- 01-54 Sweep Loss Circuit Diagram ----------------------------------------------------------------------------------------- 01-55

AP-14 AND AP-24 CHASSIS 60SX1K AND 60SX2K (Digital convergence models)

Screen Overlay Jig for Digital Convergence Alignment ---------------------------------------------------------- 03-01 Explanation of Customers Digital Convergence ------------------------------------------------------------------ 03-02 Remote Control Blow-Up for Digital Convergence Use -------------------------------------------------------- 03-04 New Remote Control Blow-Up ------------------------------------------------------------------------------------- 03-05 Explanation of How to do Digital Convergence ------------------------------------------------------------------ 03-06 Convergence Adjustment Sequence Chart ------------------------------------------------------------------------- 03-07 Specifications for Misconvergence --------------------------------------------------------------------------------- 03-08


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DP-1X and DP-2X BLANK PAGE NOTES

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R940D925

Q905

Q909

C952

D926

C987 R942

ZD906

Q908

1418

IC901Switch Mode

Driver

B+

D930R910

R915

1

24

IC904

Q903

R942C928

C957Q906

R953D927

D929

R959

R938D910

ZD916

ZD901

Q907

Q910

Q904

COLD GROUND

C967

R957

R978

L982

L981P

DEFLECTION

Vertical

IC601

D657

ZD651

D655

9

-12V

12V

Yokes X 3

C655

2200uF

R665

R666

2.2Ohm

R667

R670

12

R982 R981

H

R734 D702 ZD710

Q909 and Q907

ARE LABELED

AS 2SA3413B

SHOULD BE 2SC3413B

Q907 DRAWN WRONG

IN SCHEMATICT702

FLYBACK

D939

HOT GROUND

3

AP-1X and AP-2X SHUT DOWN CIRCUIT DIAGRAM

5

6

D928

17V

-14V

26V

-25V

130V

15V

PAGE 01-10


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EQ313

B

Q312

Q317

B

B

Contrast

Brightness

E

IC301

Enhance

IC

IC001 uP

TUNER

IC501

VIDEO

RAIN

FOREST

IC

IC3005

Y

Selector

ICIC004

D/A Conv

S Sel

Tuner

IC3001

Audi/Video

Selector IC

AP-12 VIDEO SIGNAL DIAGRAM

AVX2AVX1

SelectedVideo

Out

Blue GammaCorrection

RED CRT

GREEN CRT

BLUE CRT

For Sync Circuit

30

49

50

3

2

4

5 9

1

7

8

2

38

1

40

9

7

30

1523

20

3

5

9

23 24

4 6

8 4

17

M301

2-Line

CombFilter

6

1

Avx 2

Avx 1 Lo

Lo

Hi Hi

Hi

Lo

Pin 23Pin 24Mode

Load 2

Data 2

Clock

S-In OneS-In

S-Sel

B E

Q314

-Y DriverB

E

B E

Q324

Q323

B E

B E

Q3007Q3023

Luminance

Q318B

E

Q311B

SB

SR

VIDEO ONEVIDEO TWO

2V P/P

PAGE

01-24A

Q305

B E

26

28

Cross Hatch


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AP-1X and AP-2X SWEEP LOSS DETECTION CIRCUIT EXPLANATION

PAGE 01-54

(See Sweep Loss Detection Circuit for details)

The key component in the Sweep Loss Detection circuit is Q0018 andQ0022. These transistors are normally bi-ased off. When either base voltage becomes 0.6V below the emitter, it will be turned on, causing the +12V to be

applied to two different circuits, the H Blkcircuit of IC501and the Y Outcircuit of IC502 which in turn biasesoff Q3023. Either Horizontal Sweep Loss detection Q0018or Vertical Sweep Loss detection Q0022turning on,will activate the Sweep Losscircuit.

CONCERNING THE SWEEP LOSS CIRCUITThere are two factors that can cause Q0018 or Q0022 to activate; loss of Vertical and/or Horizontal deflectionwhich is sensed by monitoring H and V Blk pulses.

Loss of Vertical Blanking (V Blk)The Vertical pulse at the base of Q0024switches O0024on and off at the vertical rate. This discharges C0051sufficiently enough to prevent the base of Q0023from going high to turn it on and activating Q0022.

When the 24 Vp/p positive vertical blanking pulse is missing from C0052to the base of Q0024, the transistor

will turn off, which will cause the collector to pull up high through R0213. C0051charges up through R0213.This in turn will cause Q0023 to turn on because its base pulls up high, creating an increase of current flow fromemitter to collector. This will increase the voltage drop across R0211. The junction of R0210and R0185, which

is supplied pull up voltage from the 12Vsupply. This increase of current flow through R0211will pull the baselow and bias on Q0022and the events described in Sweep Loss Activation Circuit above will occur.

Loss of Horizontal Blanking (H Blk)The Horizontal pulse at the base of Q0020switches O0020on and off at the horizontal rate. This discharges

C0046sufficiently enough to prevent the base of Q0019from going high which would turn it on and activateQ0018.

When the 11.6 Vp/p positive horizontal blanking pulse is missing from C0047 to the base of Q0020, it will beturned off, which will cause the collector to go high through D0034, R0166, R0185as the +12V charges C0046.This in turn will cause Q0035to turn on because its base is pulled up high when zener ZD0020fires. When

Q0019turns on, an increase of current flow from emitter to collector through R0170. This increase of current

flow through R0170will bias on Q0018and the events described in Sweep Loss Activation Circuit above willoccur.

1. SPOT ACTIVATION CIRCUITWhen the relay driver Q0001 turns off, the relay voltage raises to the source voltage. The A 12V is applied to theanode of D0036, forward biasing it. This voltage arrives at the base of Q0019turning it on. The drops the collec-tor voltage and in turn drops the base voltage of Q0018turning it on. This action activates the Horizontal Sweep

Loss circuitry Q0018 which then Mutes the output from the Rainforest IC IC501. This is done to prevent CRTburns.

(See Audio Video Mute Circuit for details)


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R0169

Q0023

H Blk

12V P/P

V Blk

26V P/P

AP-1X & 2X HORIZONTAL & VERTICAL SWEEP LOSS DETECTIO

12V

C0052

R0214

R0215

R0213

D0040

Q0024C0051 D0038

D0039

R0211

R0185

R0213

Q0022R0210

C0047Q0020

R0166

R0167

D0034

C0046R0172

R0166

ZD0020

R0

171

D0035 Q0019

R0170

A12V

Q0018

D0037

D0036D0226Q0001

Relay Driver RL901

A12V

21

IC0001

Power

On/Off

HV

Protect

P.Blk2

R0126

D0041 R

Q3023

Y Buffer

R7004

D

D7

R3126

H Blk

D312

PAGE

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hitachi ap1x ap2x train total

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