LG TW-864AX Service Manual ic

- 2-12 -- 2-11 -

INTERNAL BLOCK DIAGRAM OF ICs

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IC1 KA22901

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IC101 KIA6289

KIA820K

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PIN DESCRIPTION

Pin No Symbol Description

1 TAPE A IN (ch1)

Tape Play Back Input (Play)

24 TAPE A IN (ch1)

2 TAPE B IN (ch2)

Tape Play Back Input (Play/Rec)

23 TAPE B IN (ch2)

3 PB NF (ch1)

Tape Play Back NF

22 PB NF (ch2)

4/21 Metal Out Play Back Amp Metal Output

5 Pre Out (ch1)

Play Back Amp Output

20 Pre Out (ch2)

6 MIX OUT Mixing Output
7 GND GND
8 Metal/Normal SW Change Over Switch for Metal Mode and Normal Mode.
9 Rec Out (ch1)

Recording Amp Output

16 Rec Out (ch2)
10 Rec NF (ch1)

Recording Amp NF

15 Rec NF (ch2)
11 Rec IN (ch1)

Recording Amp Input

14 Rec IN (ch2)
12 GND GND
13 ALC T.G Automatic Level Control (ALC) Time Constant Terminal
17 CG Det. NF Charge up Circuit Switching Terminal
19 TAPE A/TAPE B SW Play Back Amp Input Selector