Pioneer TS4 Service Manual page 52

TS4
7Appendix.
MODEM Check Sequence
1. Initialization
Normal Modem Check Start
It takes about 38 to 40 seconds
Initialize ex-modem
52
External Modem
Initialize IRD modem
OK
OK
OK
OK
Computer
ATZ
AT1¥Q50
ATZ
ATS0
ATE0
AT + MS = 3.0 ∗1
TH
(This is for 4 generation)
IRD
OK
OK