Alignment Procedures - Marantz SR480 Service Manual

7. ALIGNMENT PROCEDURES

TUNER
1.Equipment Required
AM Standard Signal Generator (AM SSG)
Oscilloscope
AC Voltmeter
FM Standard Signal Generator (FM SSG)
Stereo Modulator
Note : Disconnect external FM antenna prior to alignment
2. Alignment and Test Point
Audio Generator
Distortion Meter
DC Voltmeter
Frequency Counter
40
3. Pin Functions
Pin
Symbol Description
No.
1 7G~8G Grid signal output for FIP.
3 VDD +5V power supply.
4 P/D Input for power down.
5 VOL. UP Input for main volume up.
6 RDS CLK CLOCK signal output for TDA7330.
7 VOL. DOWN Input for main volume down.
8 RMC Input for remocon data.
9 RDS OPTION Input to select RDS or non-RDS.
(At "H", RDS is selected.)
10~11 Not used!
12 7536DATA DATA signal output for LC7536
13 7536CLK CLOCK signal output for LC7536
14 DATA DATA signal output for
LC7821 and LC7822.
15 CLK CLOCK signal output for
LC7821 and LC7822.
16~19 KEY IN1~4 Data input for key scan.
20 RDS. DATA Input for RDS data of TDA7330.
21 PROTECT Input for detecting "PROTECTION"
condition.
22 7001. DATA DATA signal output for LM7001.
23 7001. CLK CLOCK signal output for LM7001.
24 STEREO Input for detecting "STEREO"
condition.
25 DSP. CLK CLOCK signal input from IC810
(uPD78044, pin 9).
26 DSP. IN DATA signal input from IC810
(uPD78044, pin 11).
27 DSP. OUT DATA signal output to IC810
(uPD78044, pin 10).
28 VREF Reference voltage.
(Connected to +5V, Not VDD.)
29 SPK OFF Input for detecting "SPEAKER
SWITCH IS OFF" condition.
30 S. MUTE Output for surround channel mute.
(At "H", it is active.)
31 F. MUTE Output for front channel mute.
(At "H", it is active.)
32 AMP MUTE Output for main mute.
(At "H", it is active.)
33 C. MUTE Output for center channel mute.
(At "H", it is active.)
34 W. MUTE Output for subwoofer mute.
(At "H", it is active.)
35 TUNED Input for detecting "TUNED"
condition.(At "L", it is active.)
36 STEP Input for selecting the frequency
ranges steps of FM and AM.
37 VSS Tis pin provides the ground
potential.
4. Key Matrix
P5 P6
OUT
IN PIN66 PIN67 PIN68
KEY IN1 STEREO AUX/FRONT
PIN16 SW320 SW305 SW323
KEY IN2 VCR1 DIGITAL VCR2/DVD
PIN17 SW321 SW306 SW322
KEY IN3 SLEEP WOOFER AUX
PIN18 SW302 SW303 SW324
KEY IN4 SURROUND MID TAPE1
PIN19 SW319 SW304 SW325
Pin
Symbol Description
No.
38 RESET Input for resetting the CPU.
(At "L", it is active.)
39 EXTAL Input for 10MHz crystal oscillator.
40 XTAL Output for 10MHz crystal oscillator.
41 G Ground.
42 Not used!
43 G Ground.
44 VDD +5V power supply.
45 VFDF -30V power supply for FIP.
46 4094CE LC7536 CHIP ENABLE
( FRONT VR).
7822ST Chip enable signal output to
47
7821CE LC7821 and LC7822.
48 7001CE Chip enable signal output to
LM7001.
49 7536CE2 Chip enable signal output to
LC7536.(Center, rear and woofer
CH. electric vol.)
50 DSP. RST RESET signal output to IC810
(uPD78044, pin 17).
51 ST-BY Not used!
52 TU. MUTE Output for tuner mute.
(At "H", it is active.)
53 7536CE1 Chip enable signal output to
LC7536.(Front channel electric
volume)
54 LED-FRONT Output to drive RF LED.
(At "H", it is active.)
55 LED-OPT Output to drive OPTICAL LED.
(At "H", it is active.)
56 LED-MUTE Output to drive MUTE LED.
(At "H", it is active.)
57 LED-COAXIAL Output to drive COAXIAL LED.
(At "H", it is active.)
58 LED-MID Output to drive MIDNIGHT LED.
(At "H", it is active.)
59 LED-WOOFEROutput to drive WOOFER LED.
(At "H", it is active.)
60 LED-RF Output to drive RF LED.
(At "H", it is active.)
61 LED-ST/BY Output to drive stand by LED.
(At "H", it is active.)
62~65 P1~P4 Segment signal output for FIP.
66~73 P5~P12 Segment signal output for FIPand
data output for key scan.
74~88 P13~P27 Segment signal output for FIP.
89 VDD +5V power supply.
90~94 P28~P32 Segment signal output for FIP.
95~100 1G~6G Grid signal output for FIP.
P7 P8 P9 P10 P11 P12
PIN69 PIN70 PIN71 PIN72 PIN73
LD DELAY CENTER FM MODE TAPE2 DISPLAY
SW335 SW331 SW312 SW326 SW308
DELAY CENTER TUNING FM/AM SEARCH
SW336 SW330 SW313 SW328 SW307
REAR CEN-MODE MEMORY TUNING PTY-SEL
SW333 SW329 SW310 SW314 SW309
REAR T. TONE F/P CD
SW334 SW332 SW311 SW327
37