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參數(shù)資料
| 型號(hào)： | LA4167M |
| 元件分類： | 消費(fèi)家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PDSO30 |
| 封裝： | 0.375 INCH, MFP-30 |
| 文件頁數(shù)： | 4/21頁 |
| 文件大?。?/td> | 372K |
| 代理商： | LA4167M |
LA4167M
No.4036-12/21
Continued from preceding page.
Part name
Recommended value
Description
R1
Recording amp load resistor. Varies according to set manufacturer, but 10k
Ω is recommended.
R2
100
Ω
Controls voltage gain for playback preamp and mike amp.
In general usage within the range of 100 to 200
Ω is recommended.
R3
EQ constant for playback preamp. Varies according to set manufacturer.
R4
10k
Ω
Playback amp load resistor and power input potentiometer.
R5
100k
Ω to 1MΩ
Controls ALC attack time.
R6
1M
Ω
Low-temperature operation resistor (for bias) when fOSC = 15Hz.
R7
20k
Ω
fOSC operation resistor. Because this oscillates in balance with on-chip resistors, a high-precision resistor is
recommended.
R8
500k
Ω to 1MΩ
Onset speed-up resistor when fOSC = 15Hz.
R9
1
Ω to 10Ω
Earphone output potentiometer.
R10
100
Ω to 300Ω
Varies according to motor characteristics.
R11,
R12
Resistor controlling motor speed. Motor speed is adjusted with R11 (fixed) and R12 (variable). Varies
according to motor characteristics and set manufacturer.
R13, 14
10k
Ω to 30kΩ
Mute bias resistor
R15
100
Ω to 300Ω
LED drive current control resistor. LED if off only when cue-tone is on.
R16
3k
Ω
Resistor controlling ALC width.
R17
10k
Ω to 20kΩ
MIC input bias resistor.
R18
5k
Ω to 20kΩ
Controls internal mike output level. Varies according to set manufacturer.
R19
6.8k
Ω
Control recording head DC bias current. 6.8
Ω is recommended when recording with DC bias system. Be
aware that when resistance is high, bias current shows a tendency to diminish, and when resistance is made
low, the playback head level is decreased during playback.
IC Usage Cautions and Explanation of Operation
(1) Playback preamp and power amp voltage gain distribution during playback
The voltage gain of the preamp can be adjusted by resistor R2, connected externally. In this case, be aware that
varying the voltage gain causes the voltage gain for the playback preamp and the mike amp to be each varied
simultaneously.
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