Service Manuals, User Guides, Schematic Diagrams or docs for : NAD C C-352 C-352
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January 2007
SERVICE MANUAL NAD
C 352
C 352
STEREO
AMPLIFIER
STEREO
AMPLIFIER
ALIGNMENT PROCEDURE (C352)
I. INITIAL ADJUSTMENT (No load connected)
A. OUTPUT OFFSET VOLTAGE
1. Connect a DC Millivoltmeter to L Channel speaker output terminals.
2. Turn unit "ON" and adjust VR101 (100ohms) to get a reading on IC107 Pin 1,
which must be <100mV.
3. Connect the DC Millivoltmeter to R Channel speaker output terminals and adjust
VR102 (100ohms) to get a reading on IC108 Pin 1, which must be <100mV.
B. IDLING CURRENT
1. Leave power "ON" for a minimum of 5 minutes.
2. Connect a DC Millivoltmeter to TP101 and TP102, then adjust VR103 (300ohms)
for 5-6.5mV reading on meter.
3. Connect a DC Millivoltmeter to TP103 and TP104, then adjust VR104 (300ohms)
for 5-6.5mV reading on meter.
II. FINAL ADJUSTMENT
Repeat procedure A and B for offset voltage and idling current alignment respectively.
2
3
IC401
P401B LM7805
1 1 3
1 I O
2
2 +5.6V
G
2PIN3.96-C
TO POWER SWITCH
2
HS401
P402B
J401 TR401
1 1 2 1 10
1
2 ~
+
2 JUMPER C402 C403 D401 C404
2PIN7.92-C FOR C VERSION C401 2200uF /16V 10nF /63V 1N4148 10nF /63V
1A/400V
FROM AC INLET 10nF /100V - +
BR401
J402 ~
1 2 2 DB104 70-004004-0
P403B JUMPER FOR IC401
1
1
2 FOR AH VERSION
2
2PIN7.92-C t
TO MAIN TRANSFORMER 5 6
RL401 T972 STANDBY TANSNSFORMER
3
P404B 4
1 1 D402
2
R401 STBY
2 DH1U 24VDC TV-5 1N4148
1.5K
Q401
ACOUTLET 2SC1815
TO AC OUTLET
D403
Q404 1N5404
2SA970 R407 R408
DGND R411 +5.6V
100 1K
AC1
0.1 /3W HS402
R403
4
R412
22K
Q402
3
TRI G
R405 0.1 /3W
P405B 2SC1815
~ 1K STBY
1 ~
1
10nF /250V
10nF /250V
2 2 1
C406
2 R413
C405
3 - +
3 - + 220
4 SCR401 +
4 BR402 ~ BR403 BT151-500R 70-004003-0
5 KBU8D C407
5 ~ KBU8D FOR SCR401&BR402
22000uF /63V
5PIN3.96-C +50V
FROM FUSE BOARD
AC2 +
SCR402 C408 Q406 Q407
BT151-500R 22000uF /63V 2SA970 2SA970
1 2 HS403
P406B
10 DGND
R409 R414
10 R415
9 +5.6V 1K 2.2K
9 R402 R406 2.2M
8 STBY 10K 1K Q405
8
3
7 +5. 6V 2SC2240 R410
7 Q403
I /V
6 ACOFF
100
6 2SA1015
5 TRIG
5
4 I/V
70-004003-0
POWER SUPPLY
4 R404
3 AGND FOR SCR402&BR403
3
2 AC2
22K
2
1 AC1
1
R416 D404
10PIN2.54-C ACOFF
TO STANDBY BOARD
15K 1N4007 +
C352 POWER SWITCH BOARD C409
P407B S901 4.7uF /50V
1 P901A PS4E-B-039
1
2 1 1 2
2 1
3 2
3 2
4
4
2PIN3.96-A300
4PIN3.96A1001
TO MAIN BOARD
INPUT & PREAMPLIFIER
RCA301A
AV6-8.4-13 RL301A
1 R301 4 C321
3
+
470
C301 HRS2H-S-DC12V-A
R319 100uF /16V
RK16812MGA10(20KBX2)
100pF /1KV
R345
3
1meg C323 390 /1% R351
AGND AGND 1.6K /1%
RV303A
RCA301C RCA304A
AV6-8.4-13 100nF /63V
AV6-8.4-13
R303 RL302A
4 4 C325 1
R341 22nF /50V,5%
RK163121A2CA 10KAX2
470 3
RK163121A2CA 10KAX2
C303 3.3K /1%
3
3
6
R321 HRS2H-S-DC12V-A CW CW CW
100pF /1KV C329
6
3
230nF /50V,5%
RV302A
RV301A
1meg C339
2 2 5 4
+
AGND
RCA301E AGND
RK16312A10D 20KMNX2
AV6-8.4-13 47uF /50V
R305 RL303A R349
7 4 AGND
1
3.6K
470 3 RCA304C
1
1
1
RV304A
C305 HRS2H-S-DC12V-A Q301 AV6-8.4-13
R323 100pF /1KV R339 C327 C341 R357 2SK363
R343 C331 2 4
8.2K /1%
9
820 /1% 100nF /50V,5% 950nF /50V,5%
1meg 68
100nF /63V
AGND
RCA302A AGND R353 CW C343
R355 R361
6
AV6-8.4-13 R347 390 /1% 220pF /1KV
RL304A 4.7K 100K
3
1 R307 4 180 /1%
470 3
C307
R325 100pF /1KV HRS2H-S-DC12V-A
S301A
3
1meg 1 C333 AGND AGND AGND AGND
470pF /1KV
AGND
RCA302C AGND 2 R359
10MEG
AV6-8.4-13 RL305A C335
4 R309 4 3
470 3
+
SPUN19K605 10uF /50V
C309
PREMUTE
R327 HRS2H-S-DC12V-A
100pF /1KV
C337
6
1meg
AGND AGND 4 RL306A 100nF /63V
RCA302E
AV6-8.4-13 3
7 R311 5 RL301C RL303C RL305C RL307C
HRS2H-S-DC12V-A RL302C HRS2H-S-DC12V-A RL304C HRS2H-S-DC12V-A RL306C HRS2H-S-DC12V-A RL308C
470 HRS2H-S-DC12V
C311 HRS2H-S-DC12V-A HRS2H-S-DC12V-A HRS2H-S-DC12V HRS2H-S-DC12V
R329 100pF /1KV
9
1meg 1 1 1 1 1 1 1 1
2 2 2 2 2 2 2 2
AGND
RCA303A AGND
AV6-8.4-13 RL307A
1 R313 4
470 3 D301 D302 D303 D304 D305 D306 D307
C313 HRS2H-S-DC12V-A
R331 100pF /1KV
3
R337 1N4148 1N4148 1N4148 1N4148 1N4148 1N4148 1N4148
1meg 1meg
TUNER
TAPE2
TAPE1
VIDEO
RL308A
DISC
AUX
AGND
RCA303C AGND 4
CD
AV6-8.4-13 3
4 R315 5
470 HRS2H-S-DC12V
C315
R333 100pF /1KV
+18V
6
1meg + + + P301B
AGND
RCA303E AGND C345 C347 C350 C351 IRIN 1
10uF /50V 10uF /50V 47uF /25V 1
AV6-8.4-13 C349 100nF /63V IROUT 2
R317 2
7 R363 R364 SCLED 3
3
470 2.2K 2.2K +12V 4
C317 4.7uF /50V 4
C319 AGND AGND AGND AGND DISC 5
R335 100pF /1KV 5
100nF /63V CD 6
6
9
1meg M301 M302 VIDEO 7
7
1 1 AUX 8
1 1 RV303C 8
AGND AGND 2 2 Q303 + - Q304 TUNER 9
2 2 9
+
2SA1015 2SA1015
-
A
3 3 TAPE2 10
R3G1 3 3 10
4 4
4 4
10 5 5 RK16812MGA10(20KBX2) 10PIN2.54-C
5 5
6 6 P302B
6 6
C3G1 7 7 TAPE1 1
7 7 1
8 8 MUTE 2
8 8 2
9 9 STBY 3
100nF /63V 9 9 3
R365 R366 PWLED 4
4
AMP MODULE AMP MODULE 2.2K 2.2K DGND 5
R367 R368 Q306 5
AGND GND_EARTH C320 Q305 +5.6V 6
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