Read Sony CMT-EP505 / HCD-EP505 Service Manual online
HCD-EP505
26
26
6-12. SCHEMATIC DIAGRAM – MAIN Section (Except AEP, UK, CH models) (2/3) –
•
See page 19 for Waveforms.
•
See page 32 for IC Block Diagrams.
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
no mark : TUNER
(
no mark : TUNER
(
) : CD PLAY
<
> : TAPE PLAY
{
} : RECORD
Ver 1.1
IC B/D
MAIN
BOARD
(1/3)
12
IC B/D
DISPLAY
BOARD
H
MAIN BOARD
(3/3)
17
DISPLAY
BOARD
I
MAIN BOARD
(1/3)
11
MAIN BOARD
(1/3)
14
IC B/D
22
<0>
<0>
<7.7>
<0>
<0> {8.9}
<0>
AC16.4
(REC MODE)
<0.4>
{0.5}
<0.4>
{-0.1}
<0>
{0.1}
(0) <9>
<0> {0.7}
<9>
{8.3}
<0>
{8.9}
9.1
<0>
{3.6}
<0>
{3}
<0>
{3}
<0.7> {0.1}
<0>
<0>
{0.4}
<0.1>
<1.3>
<1.4>
<3.7>
<0> <0>
<0.1>
<1.3>
<1.4>
<3.7>
<0>
<7.3>
<7.5>
<0.7>
{0.1}
<0>
<0>
<0>
<0>
<0>
<0> {0.4}
<0> {2.9}
<0>
{2.9}
<0>
{3.6}
<0>
{0.7}
<0>
<0>
{0.7}
<0.7>
<0>
<0>
{0.7}
<0>
<8.4> {0.1}
<0> {0.7}
4.6
7.9
4.1
4.6
7.9
4.1
2.4
1.6
1
2.4
1.6
1
0.6
0
0
0.6
5
4
4.5
0
(0)
<11.5>
0
0
0 (0) <11.5>
0
0
(0)
<4.3>
11.8 (11.8)
{0.1}
11.8 (11.8)
{10.8}
0 (0) <11.6>
12
<2>
<2.5> {0}
<2>
<4.9> {0}
<7.7> {6.9}
CN302
7P
CN307
3P
MAIN BOARD
(2/3)
CN601
7P
SW R2
GND
SW P2
VCC
GND
CONT
SW P1
GND
SW R1
U601
U602
U603
IN2
NF2
PC2
OUT2
ALC
IN2
RF
VCC
IN1
FM1
PC1
OUT1
ALC
IN1
ALC
CONST
GND
V. N
C. R
NF
NC
GND
TROUT
DIOUT
V8
VCC
ERASE
L-CH
R-CH
HRPE101
RECORD/PLAYBACK/
ERASE
1.5N
1U
50V
REC/PB
SWITCH
Q603
AMP GAIN SWITCH
50V
REC/PB
SWITCH
2.2N
50V
50V
50V
50V
50V
50V
50V
50V
50V
50V
50V
50V
MUTING
MUTING
4.7N
2.2N
50V
1.5N
Q619
ALC
CONTROL
50V
4.7N
Q604
AMP GAIN
CONTROL
INVERTER
Q606
REC/PB
SWITCH
Q616, 617
REC BIAS SWITCH
Q615
BIAS OSC
16V
Q602
REC/PB
SWITCH
REC/PB SWITCHING
ALC,
REC/PB AMP
Q609, 610
TAPE TYPE
SELECT SWITCH
Q622, 624
TRIGGER
PLUNGER DRIVE
BUFFER
100N
133
2SD1616
REC AMP
REC AMP
BUFFER
BUFFER
50V
50V
50V
50V
Q620, 621
CAPSTAN/REEL
MOTOR DRIVE
2SB926
AMS
SUPPLIED
WITH THE
WITH THE
ASSEMBLED
BLOCK
TAPE
MECHANISM
BLOCK
1
9
(Page 25)
(Page 25)
(Page
27)
(Page 29)
(Page
29)
(Page 25)
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