Panasonic CQ-4400U, Service Manual, Page: 7 / 37

15.1. Main Block
IC601 YEAM17708621
Pin
No.
Name Description I/O Vol. (V)
AM FM TAPE
1 BATT Battery Detection I 5.3 2.5 5.3
2 (NC) (Connect to
Ground) | - - -
3 MODE2 Tape Detection
input I 4.7 4.7 4.7
4 (NC) (Connect to
Ground) - - - -
5 MS No sound
Detection (TPS) I O O O
6 R-REEL Reel Pulse
Detection(R)
I 1.5 2.3 3
7 F-REEL Reel Pulse
Detection(F) I 1.4 2 3.1
8 (NC) - - - - -
9 ST Stereo Signal
Input I 4.6 4.6 4.6
10 MTL Deck Metal
Output H:ON L:
OFF O 0 0 0
11 DOLBY
ON/OFF
Dolby NR ON/
OFF H:OFF L:ON O 0 0 0
12 (NC) - - - - -
13 MS GAIN Music Search
Gain Control
O 0 0 0
14 ACC ACC Detection I 5.2 5.2 5.2
15 MMT-F Main Motor
Control I/O 4.8 4.8 4.8
16 CD
MUTE
Main Motor
Control I/O 0 0 0
17 FM/AM
BW
FM/AM Select
Switch O 8.1 0 0.1
18 RADIO
ON
AM/FM Tuner ON O 0 0 0.1
19 WB W/B Tuner ON O 7.1 7.1 7.1
20 SSC FM/AM SSC
Control O 0 0 0
21 GND Ground - 0 0 0
22 (NC) - - - - -
23 (NC) - - - - -
24 INIT B (Pull-down) - 0 0 0
25 INIT A (Connect to
Ground) - 0 0 0
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