HHTI Symptoms Fault Co-relation PDF

**[SYMPTOMS FAULT CO-RELATION: HHTI]** +-----------+-----------+-----------+-----------+-----------+-----------+ | **Ser | **Symptom | **Probabl | **Remedia | **Test | **SMT/ | | No** | ** | e | l | Parameter | STE | | | | Defects** |...

**[SYMPTOMS FAULT CO-RELATION: HHTI]** +-----------+-----------+-----------+-----------+-----------+-----------+ | **Ser | **Symptom | **Probabl | **Remedia | **Test | **SMT/ | | No** | ** | e | l | Parameter | STE | | | | Defects** | Action** | ** | Used** | +===========+===========+===========+===========+===========+===========+ | **01.** | Horizonta | (a) | (a) Needs | (a) C43, | ATP/ | | | l | Respectiv | RSB | C49, U3, | GPTE, | | | lines on | e | correctio | U4, U5, U | Multi | | | FOV | Detectors | n | 27 and | meter and | | | | of 4 x 64 | one by | U12 of | Basic | | | | Array | one with | SPB | tool kit | | | | (LFPA) | the help | should be | | | | | defective | maintenan | serviceab | | | | | | ce | le | | | | | | menu & | | | | | | | Oscillosc | | | | | | | ope. | | | | | | | | | | | | | | \(b) On | | | | | | | completio | | | | | | | n | | | | | | | of RSB | | | | | | | correctio | | | | | | | n | | | | | | | use | | | | | | | write | | | | | | | EPROM | | | | | | | option | | | | | | | to save | | | | | | | the | | | | | | | corrected | | | | | | | parameter | | | | | | | s. | | | +-----------+-----------+-----------+-----------+-----------+-----------+ | **02.** | Bright | \(a) SPB | (a) | \(a) All | ATP/ | | | Horizonta | may be | Resoled | the | GPTE, | | | l | defective | capacitor | pins of | Multi | | | line and | | C43 and | SPB | meter, | | | Alternate | | C49. | should | Basic | | | Dead | | | be | tool kit | | | Line. | | (b) Clean | clean | and SMT | | | | | and | and | rework | | | | | resold P1 | properly | stn | | | | | connector | soldered | | | | | |. | | | | | | | | (b) C43, | | | | | | (c) | C49, U3, | | | | | | Resold | U4, U5, U | | | | | | and check | 27 and | | | | | | IC U3,U4, | U12 of | | | | | | U5, U27 | SPB | | | | | | and U12 | should be | | | | | | if faulty | serviceab | | | | | | replace | le | | | | | | with new | | | +-----------+-----------+-----------+-----------+-----------+-----------+ | **03.** | No | \(a) SPB | (a) Check | (a) Input | ATP/ | | | Thermal | may be | SPB, IF | voltage | GPTE, | | | Picture. | defective | faulty | of DDC | Multi | | | | | replace | should be | meter and | | | | \(b) DDC | with new. | 12 VDC | Basic | | | | may be | | | tool kit | | | | defective | (b) Check | (b) Input | | | | | | input | voltage | | | | | \(c) PSB | voltage | of | | | | | may be | of DDC. | Scanner | | | | | defective | If faulty | assy | | | | | | replace | should be | | | | | (d) | with new | 12 VDC | | | | | Scanner | | | | | | | assy may | (c) Check | \(c) U3, | | | | | be | input | U4, U5, | | | | | defective | voltage | U29, | | | | | | of | and U30 | | | | | | scanner | of SPB | | | | | | assy | should | | | | | | | be | | | | | | | serviceab | | | | | | | le | | +-----------+-----------+-----------+-----------+-----------+-----------+ +-----------+-----------+-----------+-----------+-----------+-----------+ | **04.** | DDC Sound | \(a) CRT | (a) Check | (a) Input | ATP/ | | | heard but | may be | CRT, If | voltage | GPTE, | | | No image | defective | faulty | of CRT | Multi | | | on eqpt | | replace | PCB | meter and | | | display | \(b) CRT | with new. | should be | Basic | | | | PCB may | | 12 VDC | tool kit | | | External | be | (b) Check | | | | | video o/p | defective | CRT PCB, | \(b) U10 | | | | signal | | If faulty | IC of | | | | present | \(c) SPB | replace | SPB | | | | when | may be | with new. | should | | | | connected | defective | | be | | | | with test | | (c) Check | serviceab | | | | stn. | | SPB, If | le | | | | | | faulty | | | | | | | replace | | | | | | | with new. | | | +===========+===========+===========+===========+===========+===========+ | **05.** | No | \(a) SPB | (a) Check | \(a) U10 | ATP/ | | | external | may be | SPB, If | IC of | GPTE, | | | Video | defective | faulty | SPB | Multi | | | display & | | replace | should | meter, | | | no video | (b) | with new. | be | Soldering | | | signal | Harness | | serviceab | stn and | | | present | may be | (b) Check | le | Basic | | | on Pin No | defective | Pin to | | tool kit | | | 7 & 8 of | | Pin | \(b) Pin | | | | circular | (c) | continuit | to Pin | | | | connector | Circular | y | continuit | | | |. | connector | of | y | | | | | may be | harness | of | | | | | defective | | Harness | | | | | | (c) Check | should | | | | | | condition | be | | | | | | of | clear | | | | | | circular | and | | | | | | connector | noise | | | | | | | free | | | | | | | | | | | | | | (c) | | | | | | | Condition | | | | | | | of | | | | | | | circular | | | | | | | connector | | | | | | | should be | | | | | | | good | | +-----------+-----------+-----------+-----------+-----------+-----------+ | **06.** | No video | \(a) SPB | (a) | IC U26 | ATP/ | | | No | may be | Reprogram | U31, U32, | GPTE, | | | Version | defective | SPB | U33, and | Multi | | | and No | | | U41. | meter, | | | Reticle. | | (b) | | Soldering | | | | | Resold | Connector | stn and | | | | | and check | P4 | Basic | | | | | IC U26 | | tool kit | | | | | U31, U32, | | | | | | | U33, and | | | | | | | U41 if | | | | | | | faulty | | | | | | | replace | | | | | | | with new. | | | +-----------+-----------+-----------+-----------+-----------+-----------+ | **07.** | Eqpt | (a) | (a) | (a) | ATP/ | | | switching | Threshold | Reprogram | Reprogram | GPTE, | | | off | voltage | PSCB | PSCB in | Multi | | | before | levels | | ATP with | meter, | | | Flashing | are not | (b) Check | competent | Soldering | | | of Low | as per | serviceab | version- | stn and | | | Voltage | requireme | ility | | Basic | | | msg. | nt. | of Bty | \(b) Bty | tool kit | | | | | | and | | | | | (b) PSCB | (c) Check | terminals | | | | | prog | terminals | of bty | | | | | corrupted | | housing | | | | | | | should | | | | | | | be good | | | | | | | in | | | | | | | condition | | +-----------+-----------+-----------+-----------+-----------+-----------+ +-----------+-----------+-----------+-----------+-----------+-----------+ | **08.** | Cooler | \(a) SPB | (a) Check | (a) Input | ATP/ | | | not work. | may be | SPB, If | voltage | GPTE, | | | | defective | faulty | of | Multi | | | | | replace | scanner | meter, | | | | (b) PSCB | with new | assy | Soldering | | | | may be | | should be | stn and | | | | defective | (b) Check | 12 VDC | Basic | | | | | PSCB, If | | tool kit | | | | (c) | faulty | \(b) Pin | | | | | Cooler | replace | to Pin | | | | | may be | with new | continuit | | | | | defective | | y | | | | | | (c) Check | of | | | | | (d) | input | Harness | | | | | Harness | voltage | should | | | | | may be | of cooler | be | | | | | defective | | clear | | | | | | (d) Check | and | | | | | | Pin to | noise | | | | | | Pin | free | | | | | | continuit | | | | | | | y | \(c) (c) | | | | | | of | Q3, Q4 | | | | | | harness | and U4 | | | | | | | of PSCB | | | | | | | should | | | | | | | be | | | | | | | serviceab | | | | | | | le | | +===========+===========+===========+===========+===========+===========+ | **09.** | Scanner | (a) | (a) Check | (a) Input | ATP/ | | | Mirror | Scanner | Input | voltage | GPTE, | | | not | assy may | voltage | of | Multi | | | moving. | be | of | scanner | meter, | | | | defective | scanner | assy | Soldering | | | | | assy | should be | stn and | | | | \(b) SPB | | 12 VDC | Basic | | | | may be | (b) Check | | tool kit | | | | defective | SPB, If | \(b) Pin | | | | | | faulty | to Pin | | | | | (c) PSCB | replace | continuit | | | | | may be | with new | y | | | | | defective | | of | | | | | | (c) Check | Harness | | | | | (d) | PSCB, If | should | | | | | Harness | faulty | be | | | | | may be | replace | clear | | | | | defective | with new | and | | | | | | | noise | | | | | | (d) Check | free | | | | | | Pin to | | | | | | | Pin | \(c) All | | | | | | continuit | pins of | | | | | | y | SPB and | | | | | | of | PSCB | | | | | | harness | should | | | | | | | be | | | | | | | clean | | | | | | | and | | | | | | | properly | | | | | | | soldered | | +-----------+-----------+-----------+-----------+-----------+-----------+ | **10.** | No | \(a) SPB | (a) Check | \(a) All | ATP/ | | | external | may be | SPB, If | pins of | GPTE, | | | communica | defective | faulty | SPB | Multi | | | tion | | replace | should | meter, | | | | (b) | with new | be | Soldering | | | | External | | clean | Stn and | | | | comn | (b) Check | and | Basic | | | | connector | external | properly | tool kit | | | | may be | comn | soldered | | | | | defective | connector | | | | | | | , | (b) | | | | | (c) | If faulty | External | | | | | Harness | replace | comn | | | | | may be | with new | connector | | | | | defective | | should be | | | | | | (c) Check | good in | | | | | | Pin to | condition | | | | | | Pin | | | | | | | continuit | \(c) Pin | | | | | | y | to Pin | | | | | | of | continuit | | | | | | harness | y | | | | | | | of | | | | | | | Harness | | | | | | | should | | | | | | | be | | | | | | | clear | | | | | | | and | | | | | | | noise | | | | | | | free | | +-----------+-----------+-----------+-----------+-----------+-----------+