Panasonic SA-HT280 Service Manual page 23

Pin / Mark I/O /
No. Division
21 SEL1
22 HOLD
23 SEL2
24 D.PASS
25 RLY
26 LOUDNESS
27 -
28 VEE
29 S/C SP
30 SP B
31 SP A
32 AF MUTE
33- SEG16-
48 SEG1
49- DEG1-
58 DEG10
59 INIT IN
60 VOL DOWN
61 VOL UP
62 -
63 IF DATA
64 LIMITTER
65 T CE
66 T CK
67 T DT
68 SUR1
69 SUR2
70 COM CK
Function
I Selector encoder for
input 1
I Blackout detection
terminal
I Selector encoder for
input 2
O DSP signal selector
O Relay control output
O Loudness control output
/ (Not used, open)
- Not used.
- Power supply for FL
driver
O Surround/Center speaker
/ control output
O Speaker B control output
O Speaker A control output
O Muting control output
O FL segment signal output
O FL digit signal output
I Diode input initial
settings
O Volume control output
(Down)
O Volume control output
(Up)
- Not used.
I Serial data signal
O Power limitter control
output
O Tuner control (CE) chip
enable / signal
O Selector/Tuner (CK)
clock signal
O Selector/Tuner (DT) data
signel
I Encoder of surround
mode / selector input1
I Encoder of surround
mode / selector input1
O Common clock signal