Sony Net MD Walkman MZ-N1 Service Manual page 24

MZ-N1
10. Press the key, and set the laser MO write adjustment mode
N
(item number 013).
Remote commander LCD display
013
11. Check that the laser power meter reading is 4.95
12. Check that the voltage both ends (TP (+) and TP (–)) of resis-
tor R521 at this time is below 80 mV.
13. Press the / key to quit the manual mode, and activate
x CHG
the test mode (display check mode).
Checking and Connection Location: MAIN board
Adjustment/checking and Connection Location:
– MAIN Board (Conductor Side) –
4 1
IC303
5 16
8 13
9 12
C303 +
C218
R218
C304
R206
SL804
C103
L302 L301
C203
C101
R201
C108 C208
L303
4 1
5 16
C309 +
8
13
IC302
9 12
C307
FB301 R813
C312 +
C335
FB303
R105
FB304
8 5 D303
R103
FB306
R104
D301
1 4
R205
R204
TH602
D612
K A
24
0.50 mW.
TP (+)
AP914 (VC)
IC551
IC301
8 9
42
43
+
C301
D903
R920
K A
C913
R909 R910
A K
C922 R905
D902
R941 14
15
+ C908
C902
C921
R902
+
C316
IC901
R903
+
C315 R607
R616
28
R605
29
IC903
D901
R961 C936
R604
A K
3
4
C901 +
2
D604
A
3
D602
K
A
1
A K
R630
C637
E1
C1
R951 R950
B2
C601
TP (–)
R503
C502
C527
IC501
1
56
C505
R505
R519
22
R521
C507
R522
1
C926 E B
C526
56
Q501
C518 +
C
C
Q908
B E
R956
43
42 R958
C919 +
D904
+
C920
2
Q909
K A S G
B
1 C
R915 Q903
E
RB801
D
L907
Q910 E B
C628
Q911
C1 C2
B1
C Q801
C2
C632
B1 E B2
E2
Q607
C839
AP912 (GND)
AP911 (VD)
AP915 (VL)
186 184 207 181
C510
190 209 215 188
FB801
C511
194 192 211 213
C513
FB803 196 198 217 204
C519
200 202 221 219
205 206 226 224
208 210 227 225
C532
212 214 243 241
C514
216 218 237 1
C515
220 222 230 228
C516
223 231 3 5
23
239 235 242
229 232 244
C506
233 234
236 238 240 17 18 19 16 36
L501
L802
C829
C524 +
Q904
Q907
E
S
C
D
B
G
D905
R929
K A
C
Q905
R916
1 5 G
B E
R922
C1 C2
D
Q906
+ 3 4 S
C929
Q901
IC902
B1 E B2
R930
+
C928 5 4
G2 G1
S2 S1
4 1
Q605
S2 S1
D2 D1
8 1
D606
Q604
K A
D608
K A 5 8
+
C603
AP611 (VREC)
IC801
9 11 6
4 7 8 245
23 12 40 24
R845
4 1
5 8
C840
C608
+
C626