LA4590W
External Component Functions: Recommended values are indicated in parentheses.
• C1 (1.0 to 10 µF)
VREF amplifier reference decoupling capacitor
This capacitor changes the VREF SVRR. Note that the SVRR is degraded as this capacitance decreases.
• C2, C10
Playback equalization constants
• C3, C9 (0.47 to 3.3 µF)
Preamplifier output capacitors
• C4, C8
AMS input high pass filter capacitors
• C5, C7
Metal tape equalization constants. (The internal resistance is 3.9 kΩ ±15%.)
• C6 (0.1 to 22 µF)
VREF decoupling capacitor
Used for excluding high frequency noise.
• C11, C12 (3.3 to 10 µF)
NFC decoupling capacitors
Note that the preamplifier low frequency gain falls as these capacitances are reduced.
• C13, C15 (1.0 to 3.3 µF)
Power amplifier input capacitors (Input resistance: 10 kΩ)
• C14, C17
Low boost low pass filter capacitors
The low boost gain can be changed by varying these capacitances.
• C16 (1.0 to 4.7 µF)
Boost amplifier NF capacitor
Note that the low boost low frequency gain falls as these capacitances are reduced.
• C18, C23, C26 (0.1 to 1.0 µF)
Oscillation suppression capacitors
• C19, C22, C25 (3.3 to 10 µF)
Power amplifier NF capacitors
Note that the power amplifier low frequency gain falls as these capacitances are reduced.
• C20, C24
Loudness high boost capacitors
The high frequency gain is changed by these capacitances.
• C21 (100 to 2200 pF)
Oscillation suppression capacitor
• C27, C29 (4.7 to 10 µF)
R.F. output decoupling capacitors (These capacitors also function as power supply capacitors and oscillation suppression
capacitors.)
• C28 (22 to 220 µF)
Power supply capacitors
No. 4468-9/19