Toshiba CF35E50, Technical Training Manual

Page: 116 / 139

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6. SURROUND CIRCUIT
The surround circuit used in this model has the modes shown
in Table 15-2 of the modes, description will be given for 5
mode. The description will be made according to items
shown below.
7. INPUT BALANCE CIRCUIT
Fig. 15-8 shows the input balance circuit.
The input balance circuit is to adjust gain of Lch and Rch so
that (L-R) component in the matrix circuit becomes zero.
Adjustment by the input balance volume control on the
remote hand unit.
Surround Mode Assumed sound field Front Rear
CONCERT HALL Concert hall O O
THEATER Movie theater O O
NIGHT CLUB Disco, Night club O O
STADIUM Baseball stadium O O
Dolby Surround Dolby surround soft X O
OFF Off X X
Fig. 15-7
Fig. 15-8
Table 15-2
[dB]
0
-8
M i n C e n t e r
C o n t r o l
L c h R c h
Response
A/V SW
L OUT
R OUT
CD04
1 m 50V
RD23
15K
CD05
22
m
4V
RD24
56K
CD06
1
m
50V
Input balance control
+
QD08
+9V
L
R
Leh
Input buffer
Reh
Input buffer
CD09
22 m 16V
2
1
3
5
7
9
11
13
14
12
10
4
6
8