Kenwood KDC-W241AY Service Manual page 4

KDC-W241AY/W241GY/W3041A/W3041AY/W3041G
/W3041GY/W312A/W312AY/W312G/W312GY/W312SAY
Ref. No. Application / Function
Q10~12 5V–3.3V Level Shift
Q13 Inverter
D1 Level Down
D2 Laser Diode Protection
D3,4 Static Electricity Countermeasure
4
COMPONENTS DESCRIPTION
Converts signal from 5V to 3.3V, or from 3.3V to 5V.
Inverts ZDET signal.
Lowers signal level by about 1.2V so that Lo level signal that turns the regulator ON/OFF
surely becomes Lo judgment level of the regulator SW.
Prevents reverse bias which is applied to laser. Laser destruction prevention.
Prevents malfunction by static electricity.
Operation / Condition / Compatibility