Teac A-4000 Service Manual page 30

- &4-4000 PLAYBACK AMPLIFIER
IN BASIC TWO STAGES
-CH-A 7-1/2" TAPE SPEED MODE
-VR 1 SEMI-FIXED
R13
150K (2
EXAMPLE
CH-A 7-1/2" PLAYBACK FRE-
QUENC Y-RESPONSE
100K Q
guest
100cps 1Ke {2Kc
- HIGH FREQUENCY WILL INCREASE WITH AN INCREASE IN Rl (FIG. 28).
+ LOW FREQUENCY WILL INCREASE WITH AN INCREASE IN R13 (FIG. 28).
FIG. ll-A
| BLANK TAPE
REC HEAD
*RA-40 RECORD AMPLIFIIR
IN BASIC THREE STAt&S
-CH-A 7-1/2" TAPE SPIED MODE
'VR 6 SEMI-FIXED
by ———f Fd
R15 eee
R115 C65
OS
fF RY AMPLE
CH-A 7-1/2" OMBSRALL
: FREQUENCY—
100c ps 1Ke 42Ke RESPONSE
- HIGH FREQUENCY WILL INCREASE WITH AN INCREASE IN C65. (FIG. 34)
+ LOW FREQUENCY WILL INCREASE WITH AN INCREASE IN R115. (FIG. 34)
FIG, 11-B FREQUENCY RESPONSE ADJUSTMENT POINTS
ee) ee