El manual esta muy detallado, los numeros de partes y los esquemas de despiece son correctísimos y muy claros, tanto para los técnicos experimentados como para los novatos.
Very good service Within one day i received a pdf of the users manual and electric circuits so I was able to measure the different voltages in the printed circuit and find out the fault Payment was also reliable and easy.Without the manual i could not have repaired.So thanks to "Search for a manual"
Text excerpt from page 23 (click to view)
37GQ-20S 37GQ-21S
TROUBLESHOOTING TABLES.
NO PICTURE
Check Picture setting by R/C. Signal should be received.
Check the tuner supply and band biases. Both must be approx. 5V DC
Normal
NO
Is tuning voltage normal at Pin (2) of Tuner?
YES
Check Q1001, IC1001, IC1003
-Check the AGC Voltage: Pin (1) of Tuner. -Check the SAW Filter: SF201