I was very glad recieving the service manal from You. Manuals were delivered promptly and were correct as advertised. A complete and very usefull service manual with all details. Thank you!
Good product. All the information is invcluded, but due to the complexity of the amplifier, it still is difficult to get it to operation again.
Text excerpt from page 64 (click to view)
TX-SR504/504E/8450 IC BLOCK DIAGRAMS AND TERMINAL DESCRIPTIONS-21
Q5501 : R2S15211FP (8 ch Electronic Volume and 11 Input Selector and Tone Control)-2/3
BLOCK DIAGRAM AND PIN CONFIGURATION
1