I've checked the high voltage circuit, pin 29 of Jungle Ic does not go over 3.2V. I also checked pin26, the HVcc. The voltage goes to about 7v then shuts off. I desolded pin 26 and voltage does same thing. I've checked the 9v regulator, seems like its working when I compared it to another unit. What I did notice is when unit is plugged in without pressing the power button, I hear a slight buzzing sound from the power supply. The working unit does not buzz. I believe unit was hit by lightning. Any help is appreciated.
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If rolling in a right to left and not up down it is a sync problem--horizontal sync comes from one of two places in general---a pulse off the high voltage transformer or directly off of what is called in the trade the Jungle IC.
That is not a joke--Most of these sets use a large IC (63 pins or more not unusual) that contains: color, video, vertical drive, ABL and much more---so much is crammed into that chip it decades ago was named the Jungle for clear reasons.
A schematic and or scope may be needed to trace and find what is bad.
if off the high voltage transformer (more common in old sets than new ones) it will be a open resistor.
If at the jungle you would have to go to the pin with the sync and follow it out to see if none at source or if lost somewhere down the stream.
The high voltage transformer may be the problem, because it feeds back secondary voltages to different parts of the set, for example is the vertical deflection voltage present at the ic, if memory serves me there should be around 26volts, if it's missing it means the fuse is open or the flyback pin is not generating the voltage.
The jungle chip is the main IC processor. It is very complicated and has hundreds of circuits surrounding its complexity.
Six blinks is a diagnostic code for loss of horizontal sweep. Thus there is no raster and no high voltage.
Cure requires a look at the jungle chip and the horizontal synch signal
to see where it got lost. Cost of repair is not so much unless the
jungle chip must be replaced which is rare, but very expensive.
A good repair place can fix it quickly and under $100 so beware of who works on it.
Diagnostic Trouble Code Storage Condition Remedy P0100 Mass Air Flow Sensor Voltage High C-8 P0100 Mass Air Flow Sensor Voltage Low C-8 P0110 Intake Air Temperature Voltage High C-10 P0110 Intake Air Temperature Voltage Low C-10 P0115 Coolant Temperature Voltage High C-9 P0115 Coolant Temperature Voltage Low C-9 P0120 Throttle Position Sensor (TPS) Voltage High C-7 P0120 Throttle Position Sensor (TPS) Voltage Low C-7 P0130 O2 Sensor 1 Circuit Voltage High C-30 P0130 O2 Sensor 1 Circuit Voltage Low C-30 P0130 O2 Sensor 1 Open Circuit C-30 P0150 O2 Sensor 2 Circuit Voltage High C-31 P0150 O2 Sensor 2 Circuit Voltage Low C-31 P0150 O2 Sensor 2 Open Circuit C-31 P0201 Injector Valve 1 Voltage High C-20 P0201 Injector Valve 1 Voltage Low C-20 P0201 Injector Valve 1 Open Circuit C-20 P0202 Injector Valve 2 Voltage High C-21 P0202 Injector Valve 2 Voltage Low C-21 P0202 Injector Valve 2 Open Circuit C-21 P0203 Injector Valve 3 Voltage High C-22 P0203 Injector Valve 3 Voltage Low C-22 P0203 Injector Valve 3 Open Circuit C-22 P0204 Injector Valve 4 Voltage High C-23 P0204 Injector Valve 4 Voltage Low C-23 P0204 Injector Valve 4 Open Circuit C-23 P0205 Injector Valve 5 Voltage High C-24 P0205 Injector Valve 5 Voltage Low C-24 P0205 Injector Valve 5 Open Circuit C-24 P0206 Injector Valve 6 Voltage High C-25 P0206 Injector Valve 6 Voltage Low C-25 P0206 Injector Valve 6 Open Circuit C-25 P0230 Fuel Pump Relay Voltage High C-6 P0230 Fuel Pump Relay Voltage Low C-6 P0230 Fuel Pump Relay Open Circuit C-6 P0325 Knock Signal Circuit 1 C-26 P0330 Knock Signal Circuit 2 C-26 P0335 No Engine RPM Signal C-32 P0335 Incorrect RPM Signal C-32 P0340 Hall Sensor Voltage High C-15 P0340 Hall Sensor Voltage Low C-15 P0403 EGR Valve Voltage High C-28 P0403 EGR Valve Voltage Low C-28 P0403 EGR Valve Open Circuit C-28 P0410 Secondary Air Pump Voltage High C-27 P0410 Secondary Air Pump Voltage Low C-27 P0443 Fuel Tank Ventilation Valve Voltage High C-29 P0443 Fuel Tank Ventilation Valve Voltage Low C-29 P0443 Fuel Tank Ventilation Open Circuit C-29 P0500 Vehicle Speed Signal C-42 P0505 Idle Air Control Voltage High C-33 P0505 Idle Air Control Voltage Low C-33 P0550 Power Steering Voltage High C-14 P0550 Power Steering Voltage Low C-14 P0560 Battery Voltage High C-4 P0560 Battery Voltage Low C-4 P0602 Control Module Programming Error C-2 P1110 Intake Manifold Valve 1 Voltage High C-34 P1110 Intake Manifold Valve 1 Voltage Low C-34 P1111 Intake Manifold Valve 2 Voltage High C-35 P1111 Intake Manifold Valve 2 Voltage Low C-35 P1230 Power Supply Relay Secondary Circuit C-3 P1405 EGR Valve Feedb. Voltage High C-28 P1405 EGR Valve Feedb. Voltage Low C-28 P1405 EGR Valve Feedb. Incorrect Signal C-28 P1501 Immobiliser No or Wrong Coding C-5 P1502 Immobiliser No Signal C-5 P1503 Immobiliser Wrong Signal C-5 P1530 A/C Relay Voltage High C-41 P1530 A/C Relay Voltage Low C-41 P1600 Reprogram or Replace Electronic Control Unit (ECU) C-2 P1602 Knock Control Module; Replace ECU C-2 P1690 Check Light Voltage High C-43 P1690 Check Light Voltage Low C-43 P1690 Check Light Open Circuit C-43 P1740 Torque Control Voltage Low C-40 P1740 Continuous Torque Control C-40
I think you missed one cap. Look for another 1ufd cap close to the jungle chip. It will have the circuit designation in the 300's like the others in the vertical circuit. It is just not located close by. I think that one will fix it.I don't have the service data with me so I can't give you the exact designation.
crt beam current too high causing shutdown as you know. Check cathode voltage of each cathode, normal levels depend on picture is around 130-150V. Missing 200V to crt board. Screen voltage problem normal 300-500V. Flyback or bad crt. ABL circuit problem. Jungle IC.
Actually, the set has the PTK188AC chassis. This is a very uncommon chassis. The most common reason for the set not starting in that chassis is a shorted high voltage splitter. That is the large black box inside the set that has 5 thick red wires in it. When the set is turned on, the computer senses the short in the high voltage circuits and immediately shuts the set back off. When the set is on, that box has dangerously high voltage in it so it should only be replaced by a qualified tech familiar with the high voltage splitters in RCA projection sets.