Mitsubishi VZ5 Chassis VS45603, 50603, 60603 & 50604 ill not power up

More than likely the problem with your TV is cause 2 but check the other also.

Cause 1.
1. SHORT DETECTS SHUTDOWN (PIN 13 OF IC700) CHECK FOR OPEN L902 PART # 351P155010 OFF Q904 C (15 V SUPPLY) ON THE MAIN PCB.

2. SHORT DETECT SHUTDOWN (PIN 13 OF IC700) CHECK FOR SHORTED D913 PART # 264P722010 AND OPEN Z901 PART # 283P039020 (Z905 AND Z900 MAY ALSO BE OPEN BECAUSE OF THIS).

3. X-RAY SHUTDOWN (PIN 55 OF IC700) CHECK FOR A LEAKY D5A09 PART # 264P244030 OFF PIN 6 OF IC5A01.

4. X-RAY SHUTDOWN (PIN 55 OF IC700) CHECK FOR LEAKY D5A21, PART # 264P045040, IN THE BEAM PROTECTION CIRCUIT ON THE MAIN PCB.

5. CHECK FOR LEAKY Q5A03 AND/OR Q5A04 BOTH PART # 260P559050, IN THE HIGH VOLTAGE DETECT CIRCUIT, ON THE MAIN PCB.


Cause 2.
1. CHECK C924 (1000 UFD 36V) AND C925 (100 UFD 50 V) IN THE -24 VOLT SUPPLY CIRCUIT ON THE MAIN PCB.

2. CHECK FOR LEAKY D913 PART # 264P722010, OFF OF PIN 12 OF T900 (15-VOLT LINE) ON THE MAIN PCB.

3. CHECK THE CONVERGENCE OUTPUTS, IC8W00, IC8W01 AND/OR IC8W02. PART # 267P007020 LOCATED ON THE CONVERGENCE PCB. THIS THE CENTER BOARD WITH THE LARGE SILVER HEAT SINK.


Good Luck, Big Irish.

First thing on a Dead VZ7 to check is the solder connection at the yokes "DY" Connector. Then Check C411 2200uf @ 35V
Then C412 10uf @50V. Then Check IC700 Pin 20 for 0VDC any voltage other than 0VDC on that pin means Diode D980 is leaky.
Hope this helps. If you need anything further let me know.

1. SHORT DETECT SHUT DOWN (PIN 15 OF IC700) CHECK FOR OPEN L902 PART # 351P070010 OFF Q904 C (15 V SUPPLY) ON THE MAIN PCB. 2. SHORT DETECT SHUTDOWN (PIN 15 OF IC700) CHECK FOR SHORTED D913 PART # 264P722010 AND OPEN Z901 PART # 283P039020 (Z905 AND Z900 MAY ALSO BE OPEN BECAUSE OF THIS). 3. X-RAY SHUTDOWN (PIN 55 OF IC700) CHECK FOR A LEAKY D5A09 PART # 264P244030 OFF PIN 6 OF IC5A01. 4. X-RAY SHUTDOWN (PIN 55 OF IC700) CHECK FOR LEAKY D5A21, PART # 264P045040, IN THE BEAM PROTECTION CIRCUIT ON THE MAIN PCB. 5. CHECK FOR LEAKY Q5A03 AND/OR Q5A04 BOTH PART # 260P559050, IN THE HIGH VOLTAGE DETECT CIRCUIT, ON THE MAIN PCB.

1. SHORT DETECT SHUT DOWN (PIN 15 OF IC700) CHECK FOR OPEN L902 PART # 351P070010 OFF Q904 C (15 V SUPPLY) ON THE MAIN PCB. 2. SHORT DETECT SHUTDOWN (PIN 15 OF IC700) CHECK FOR SHORTED D913 PART # 264P722010 AND OPEN Z901 PART # 283P039020 (Z905 AND Z900 MAY ALSO BE OPEN BECAUSE OF THIS). 3. X-RAY SHUTDOWN (PIN 55 OF IC700) CHECK FOR A LEAKY D5A09 PART # 264P244030 OFF PIN 6 OF IC5A01. 4. X-RAY SHUTDOWN (PIN 55 OF IC700) CHECK FOR LEAKY D5A21, PART # 264P045040, IN THE BEAM PROTECTION CIRCUIT ON THE MAIN PCB. 5. CHECK FOR LEAKY Q5A03 AND/OR Q5A04 BOTH PART # 260P559050, IN THE HIGH VOLTAGE DETECT CIRCUIT, ON THE MAIN PCB.