DOWNLOAD Sony CMT-DC500MD / HCD-J300 Service Manual ↓ Size: 17.2 MB | Pages: 93 in PDF or view online for FREE

6

MD mechanism deck
(MDM-7B)

Digital board

Main board

BD board

CN304

CN301

CN801

CN1001

CD mechanism deck
(CDM55F-K4BD43)

Loading board

Main board

CD board

CN1

CN308

CN101

CN302

7

Tape mechanism deck

Main board

CN301

CN303

8

The special jig (J-2501-196-A) is useful for checking the waveform of the BD (MD) board. The names of terminals and the checking items
to be performed are shown as follows.

GND : Ground
I+3V : For measuring IOP (Check the deterioration of the optical pick-up laser)
IOP

: For measuring IOP (Check the deterioration of the optical pick-up laser)

TE

: TRK error signal (Traverse adjustment)

VC

: Reference level for checking the signal

RF

: RF signal (Check jitter)

FE

: Focus error signal

I+3V

CN105

IOP

TE

VC

GND

FE

RF

I+3V
Iop

GND

TE
FE
VC
RF

I+3V

IOP

GND

TE
FE

VC

RF

1

7

for

MDM-7B

9

BAND wj (36, 37)
CD Z qh (10, 11)
CD . > ql (11, 12)
CD m M ql (11)
CD x w; (11, 12, 19, 40)
CD u ws (10–12)
ENTER/START 7 (19, 20, 40,

41)

FUNCTION 9 (10, 12, 15, 16,

21–24, 39, 41, 45)

MD Z qf (15, 16, 18, 26)
MD . > qk (15–17, 52)
MD m M qk (15)
MD x wd (15, 17, 19–22, 40, 41)
MD u wf (15–17, 21)

PHONES jack wa
PLAY MODE/DIRECTION 3

(10, 12, 13, 15–17, 26, 34, 39–
41)

REC MODE 8 (22)
Remote sensor qd
REPEAT 4 (11, 15, 36)
STEREO/MONO 4 (37)
SYNCHRO REC 6 (19, 20, 40)
TAPE m M qs (39)
TAPE X qj (39, 41)
TAPE x wg (20, 39–41, 52)
TAPE Y wh (39–41)
TUNING MODE 3 (36, 37)
TUNING +/– 2 (36, 37)
VOLUME qg

1

wj

wh

wg

wf

wd

ws

2 3

7

8

9

0

qa

qs

qd

qf

qg

qh

qj

qk

ql

w;

wa

4 5

6

@/1 (power) 1 (7, 18, 26, 37, 43,

45, 52)

z MD qa (21, 24, 25, 52)
Z PUSH 5 (39)
z TAPE 0 (41)

This section is extracted
from instruction manual.