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13

Extension cable
 (J-2501-077-A)(1.25mm/ 13P/ 300L)

Extension cable
 (J-2501-011-B)(1.25mm/ 19P/ 300L)

MAIN board

AMP board

I/O board

keep here open.

Slant the MAIN board using the two extension cables (19-pins) (J-2501-011-B) and (13-pins) (J-2501-077-A), and check the MAIN board.

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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.

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)

GND

: Ground

TE

: TRK error signal (Traverse adjustment)

FE

: Focus error signal

VC

: Reference level for checking the signal

RF

: RF signal (Check jitter)

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-7S2D

15

The Iop value labeled on the optical pick-up can be stored in the non-volatile memory. By storing the value, it will eliminate the need to look
at the value on the label of the optical pick-up. When replacing the optical pick-up or non-volatile memory (IC195 of BD(MD) board), store
the Iop value on the optical pick-up according to the following procedure.

1. Press the   ?/1  button to turn on the power.
2. Press the [FUNCTION] button to select the “MD” function.
3. While pressing the  MD x  stick and the  FUNCTION  button at the same time, press the  NET MD  button.
4. Press the  > “R”  button stick to display “[Service]”. Then press the  ENTER/YES “R”  button.
5. Press the  > “R”  stick to display “Iop Write” (C05) and press the  ENTER/YES “R”  button.
6. The display becomes “Ref=@@@.@” (@ is an arbitrary number) and the numbers which can be changed will blink.
7. Input the Iop value written on the optical pick-up.

To select the number

: Press the   . “R”  stick or the  > “R”  stick.

To select the digit

: Press the CLOCK/TIMER SET “R” button.

8. When the  ENTER/YES “R”  button is pressed, the display becomes “Measu=@@@.@” (@ is an arbitrary number).
9. As the adjustment results are stored for the 8 value. Leave it as it is and press the  ENTER/YES “R”  button.
10. “Complete!” will be displayed momentarily. The value will be stored in the non-volatile memory and the display will become “Iop

Write” (C05).

11. Press the  REPEAT/FM MODE “R”  button to exit the mode.
12. Press the  ?/1  button to turn off the power. (HCD-SE7)

1. Press the  ?/1  button to turn on the power.
2. Press the  FUNCTION  button to select the “MD” function. (HCD-SE7)
3. While pressing the  MD x  stick and the  FUNCTION  button at the same time, press the  NET MD  button.
4. Press the  > “R”  botton stick to display “[Service]”. Then press the  ENTER/YES “R”  button.
5. Press the  > “R”  botton stick to display “Iop Read” (C26) and press the  ENTER/YES “R”  button.
6. “@@.@/##.#” is displayed and the recorded contents are displayed.

@@.@

: indicates the Iop value labeled on the optical pick-up

##.#

: indicates the Iop value after adjustment

7. To end, press the  MENU/NO “R”  button to display “Iop Read” (C26). Then press the  REPEAT/FM MODE “R”  button.
8. Press the  ?/1  button to turn off the power.

Before performing repairs, perform the following checks to determine the faulty locations up to a certain extent.
Details of the procedures are described in “SECTION 5  ELECTRICAL ADJUSTMENTS”.

The criteria for determination above is intended merely to determine if satisfactory or not, and does not serve as the specified value for adjustments.
When performing adjustments, use the specified values for adjustments.

• 0.93 mW power

Specified value :0.84 to 0.92 mW (KMS-262A)

0.90 to 0.96 mW (KMS-262E)

• 8.65 mW power

Specified value :8.1 to 8.7 mW (KMS-262A)

8.4 to 8.9 mW (KMS-262E)

• Iop (at 8.65 mW)

Labeled on the optical pick-up

Iop value 

±

 10mA

• Unsatisfactory if displayed as “NG : XXXX”(XXXX

are arbitrary numbers)

• Unsatisfactory if displayed as “T=@@ (##) [NG]”

(@@, ## are both arbitrary numbers)

Laser power check

(6-2 : See page 45)

Auto check
(6-4 : See page 46)

Temperature

compensation

offset check

(6-1 : See page 45)

• Clean the optical pick-up

• Adjust again

• Replace the optical pick-up

• Replace the optical pick-up

• Replace the optical pick-up

• Check for disconnection of the circuits around

D101 (BD(MD) board)

• Check the signals around IC101, IC151, CN102,

CN103 (BD(MD) board)

16

This section is extracted
from instruction manual.

AM 2 (62, 64)
Disc tray cover qa (12)
DISPLAY 8 (36, 43,  70, 71, 73, 

77)

Display window qs
ENTER/START qg (40)
FM 2 (62, 64)
FUNCTION 5 (11, 34, 35, 36, 

42, 43, 44, 46, 50, 52, 53, 55, 
56, 57, 58, 60, 78, 80)

MD stick 3 (10)
MD slot qh
SYNCHRO MODE qg (40)

NET MD qd (78)
PHONES jack qf
REC MODE qg (39, 42, 43)
REC/REC IT qg (42, 43, 44, 46)
Remote sensor q;
SA-CD/DVD stick 4 (10)
TUNER stick 2 (10)
VOLUME 

+/− 6 (67, 77)

?/1 (power) 1 (9, 38, 48, 68, 

87)

?/1 indicator 9
Z (disc eject) 7 (12)
+/− 2 (62)
x (stop) 34 (13, 29, 34, 40, 77, 

84)

./> (go back/go forward) 

34 (13, 35, 50, 66, 77)

NX (play/pause) 34 (13, 28, 

34, 42, 43)

Z (MD eject) qj (35, 38, 48)

Use this page to find the location of buttons and other 
parts of the system that are mentioned in the text.

r

ENTER/START

 qg

 (40)

R

R

1

2 3 4

9

qs

qf

qd

qg

qh qj

6

5

78

qa

q;