Sony SPP-874, Service Manual, Page: 16 / 38

– 16 –
Channel Setting:
During startup in machine test mode, make the following channel
settings by loading the terminal input data.
45 52 51 50 49
TX frequency RX frequency
PC0-I/O PD3-I PD2-I PD1-I PD0-I
(MHz) (MHz)
(TP205) (TP204) (TP203) (TP202) (TP201)
CH1 L L L L H 48.760 43.720
CH2 L L L H L 48.840 43.740
CH3 L L L H H 48.860 43.820
CH4 L L H L L 48.920 43.840
CH5 L L H L H 49.020 43.920
CH6 L L H H L 49.080 43.960
CH7 L L H H H 49.100 44.120
CH8 L H L L L 49.160 44.160
CH9 L H L L H 49.200 44.180
CH10 L H L H L 49.240 44.200
CH11 L H L H H 49.280 44.320
CH12 L H H L L 49.360 44.360
CH13 L H H L H 49.400 44.400
CH14 L H H H L 49.460 44.460
CH15 L H H H H 49.500 44.480
CH16 H L L L L 49.670 46.610
CH17 H L L L H 49.845 46.630
CH18 H L L H L 49.860 46.670
CH19 H L L H H 49.770 46.710
CH20 H L H L L 49.875 46.730
CH21 H L H L H 49.830 46.770
CH22 H L H H L 49.890 46.830
CH23 H L H H H 49.930 46.870
CH24 H H L L L 49.990 46.930
CH25 H H L L H 49.970 46.970
TEST1 H H L H L 48.800 43.780
TEST2 H H L H H 48.970 43.890
TEST3 H H H L L 49.910 46.800
TEST4 H H H L H 49.950 46.900
Machine Test Mode Input / Output:
1. Input (Input ports for other than main tasks)
Pin Name Pin No. Function Logic
PD0-I/O (TP205) 45
PD3-I (TP204) 52
PD2-I (TP203) 51 Setting the CH (channel) Refer to channel setting
PD1-I (TP202) 50
PD0-I (TP201) 49
TEST I/O (TP316) 36 Startup of the test mode. H : Start, L : No start
2. Output (Output ports for other than main tasks)
Pin Name Pin No. Function H Logic L Logic
TALK LED (TP314) 40
Various input/output monitor output
No detection Detection
(default : RSSI (H) detection).
LCD/KEY LED
39
During test mode : All light lit However, does not
No light Light
(D302 to 308) include measurment of consumption current.
Pin No.
Channel