Advertisement
KX-W8040
CIRCUIT DESCRIPTION
RECORD/PLAYBACK AMPLIFIER UNIT (X28-2310-10)
Parts Description
Use/Function
Operation/Condition/interchangeability
RS
ae
ee eee eee
ECHA(A) SOL CONT.
ECHA(B) SOL CONT.
UICK REV. AMP
ao
< > < Be)
[7
POs
2SC1740S(Q,R)[
+12VAVR
momentarily when the power is switched on.
| Q25~28 | 2SA933S(Q,R) [PLAYOUTMUTING
| ControlledbyQ39
ontrolled by Q38_
OFF: B REC
FL DRIVER
ontrolled by Q42 and Q43
ontrolled by IC3 pin 5
OFF: A REC
ontrolled by IC3 pin 4
OFF: B REC
ontrolled by 1C4 pin12
OFF:
AREC
ontrolled by IC4 pini3
OFF:BREC
ontrolled by IC1 pin 14
ontrolled by IC5 pin 4
OFF: High speed
ontrolled by IC5 pin i3
OFF: Hich speed
ontrolled by IC1 pins 10 and 11
ontrolled by IC4 pins 7 and2
OFF:
A Normal
A-BIAS CONTROL
-BIAS CONTROL
-REC MUTING DRIVER
-REC MUTING DRIVER
LAY OUT MUTING DRIVER
| Q40.—S«
| DTC124ES _—| A-CPM SPEED CONTROL
B-CPM SPEED CONTROL
FL, DRIVER
DTC124ES
-NORMAL BIAS CONTROL
DTC124ES
-NORMAL BIAS CONTROL
ontrolled by IC4 pins 9 and 11 OFF: B Normal
C
C
C
C
C
C
C
C
C.
C.
C
C
IGH-DUBB MUTING DRIVER | Controlled by IC3 pin8
OFF: High speed onl
-EH BIAS OSC CONTROL __| Controlled by Q35
OFF: A REC
-EH BIAS OSC CONTROL _| Controlled by Q36
OFF: B REC
-BIAS(HX) CONTROL
Controlled by Q35
OFF: A RES
-BIAS (HX) CONTROL
Controlled by Q36
OFF: B REC
-HEAD R/P CONTROL
Controlled by IC3 pin7
ON: A REC
-HEAD R/P CONTROL
Controlled by IC3 pin6
ON: A REC
IGH SPEED HEAD EQ
Controlled by IC3 pin8
OFF: High speed only
ontrolled by IC4 pin5
OFF: Recodimg
ontrolled by 1C4 pin1
ON:CCRSon!
ontrolled by IC4 pin 2
ON: Auto bas recording
ontrolled by IC4 pin4
ON: Dolby off
ontrolled by IC4 pin3
ON: Dolby
3
ontrolled by IC4 pin6
ON: Multipbx filter on
Controlled by IC4 pin5
ON: Dolby
jlayback
| 56
| DTCI24ES | P-BEQR/P SW
| 57S
| DTC124ES
| NOR/CCRS SW
| asa | DTC124ES__ | NOR/OSC SW
[ass
| DTC124ES__| DOLBY ON/OFF SW
Fa60
[| DTC124ES_| DOLBY B/C SW
PX ON OFF SW
OLBY R/P SW
Advertisement
