Read Sony CMT-EP505 / HCD-EP505 Service Manual online
HCD-EP505
22
22
6-8.
SCHEMATIC DIAGRAM – MAIN Section (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
2
DISPLAY
BOARD
C
MAIN BOARD
(3/3)
7
DISPLAY
BOARD
D
MAIN BOARD
(1/3)
1
MAIN BOARD
(1/3)
4
MAIN
BOARD
(1/3)
2
IC B/D
IC B/D
IC B/D
<0>
{2.9}
{0.1}<0.7>
<0.1>
<0.1>
<1.3>
<1.4>
<3.7>
<7.3>
<7.3>
<0>
<0> <0>
<0>
<0>
<0>
<1.3>
<1.4>
<3.7>
<0>{8.9}
<0>
<0>
<0>
<0>
<0>
<7.7>
<0>{2.9}
<0>
{0.4}<0>
{0.1}
<0.7>
<0.7>
<0>{0.7}
<0>{0.7}
<0>
{0.7}
{0.7}
<0>
<0>
<0>
<0>
<0>
{0.4}
{0.4}
<0.7>{0.1}
<0>{3}
{3}<0>
<0>
{3.6}
{3.6}
9.1
<0>{8.9}
<9>{8.3}
<9>{0}
<0>{0.7}
<0.4>
{-0.4}
{-0.4}
<0>
{0.1}
<0.4>
{6.5}
AC16.4
(REC MODE)
<0>{0.7}
<8.4>{0.1}
<0>
<0>{3.5}
4.6
4.1
7.9
4.6
4.1
1.6
1
7.9
2.4
1.6
1
2.4
<2.5>{0}
{0}<4.9>
<7.7>{6.9}
<2>
<2>
12
11.8 (11.8)
<10.8>
0 (0)<4.3>
0
4
0 (0)<11.6>
11.8 (11.8)
<0.1>
<0.1>
0 (0)<11.5>
5
0.6
0
4.5
0.6
0
0
<0>
1500P
50V
REC/PB
SWITCH
2200P
Q603
AMP GAIN
SWITCH
4700P
50V
50V
Q619
ALC
CONTROL
50V
50V
50V
4700P
2200P
50V
50V
Q604
AMP GAIN
CONTROL
Q602
REC/PB
SWITCH
50V
1500P
BIAS OSC
1
2
3
6
5
4
Q615
BIAS
OSC
Q616, 617
REC BIAS SWITCH
REC AMP
50V
REC AMP
50V
16V
BUFFER
50V
50V
BUFFER
INVERTER
16V
Q606
REC/PB
SWITCH
MUTING
50V
50V
MUTING
50V
50V
50V
Q609, 610
TAPE TYPE
SELECT SWITCH
2SB926TP
Q620, 621
CAPSTAN/REEL
MOTOR DRIVE
2SD1616
Q622, 624
TRIGGER
PLUNGER
DRIVE
BUFFER
133
CN307
3P
1
9
CN302
7P
ERASE
L-CH
R-CH
HRPE101
RECORD/PLAYBACK/
ERASE
CN601
7P
MAIN BOARD
(2/3)
U601
REC/PB SWITCHING
SW R2
GND
SW P2
VCC
GND
CONT
SW P1
GND
SW R1
U602
ALC,
REC/PB AMP
IN2
NF2
PC2
OUT2
ALC
IN2
RF
VCC
IN1
FM1
PC1
OUT1
ALC
IN1
ALC
CONST
GND
U603
AMS
V. N
C. R
NF
NC
GND
TROUT
DIOUT
V8
VCC
Q605
REC/PB
SWICTH
50V
SUPPLIED
WITH THE
WITH THE
ASSEMBLED
BLOCK
TAPE
MECHANISM
BLOCK
(Page 21)
(Page 21)
(Page 21)
(Page 23)
(Page 29)
(Page 29)
Ver 1.1
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