Excellent product, very clear print. Detailed circuit and assembly diagrams - this enabled me to repair my CD player with confidence. I highly recommend this site.
Great manual, great price. Has a few of the basic operating instructions that most service manuals leave out. Complete instructions for disassembling board by board, safety precautions, schematics, complete parts list.
Text excerpt from page 22 (click to view)
37GQ-20FP
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