Sony HCD-VR90AV User Manual

HCD-VR90AV
E Model SERVICE MANUAL
COMPACT Hi-Fi STEREO SYSTEM
MICROFILM
SPECIFICATIONS
HCD-VR90AV is the tuner, deck, CD and ampli-
fier section in LBT-VR90AV.
Model Name Using Similar Mechanism HCD-VR50/VR70
CD Mechanism Type CDM37L-5BD34L
Base Unit Name BU-5BD34L
Optical Pick-up Name KSS-213D/Q-NP
Model Name Using Similar Mechanism NEW
Tape Transport Mechanism Type TCM-230AWR2/230PWR2
CD
Section
Tape deck
Section
Amplifier section
Front Speaker:
The following measured at AC 120/220/240V, 50/60Hz
DIN power output (Rated) 130 + 130W
(6 Ω at 1 kHz, DIN)
Continuous RMS power output (Reference)
160 +160W
(6 Ω at 1 kHz, 10% THD)
Center Speaker:
DIN power output (Rated) 30W
(8 Ω at 1 kHz, DIN)
Continuous RMS power output (Reference)
40W
(8 Ω at 1 kHz, 10% THD)
Rear Speaker:
DIN power output (Rated) 30 + 30W
(8 Ω at 1 kHz, DIN)
Continuous RMS power output (Reference)
40 + 40W
(8 Ω at 1 kHz, 10% THD)
Inputs
PHONO IN (phono jacks): sensitivity 3mV,
impedance 47k Ω
MIX MIC (phone jack): sensitivity 1mV,
impedance 10k Ω
VIDEO1 IN (phono jacks): sensitivity 250mV,
impedance 47k Ω
VIDEO2 IN (phono jacks): sensitivity 250mV,
impedance 47k Ω
MD IN (phono jacks): sensitivity 450mV,
impedance 47k Ω
DVD INPUT
FRONT (phono jacks): sensitivity 450mV,
impedance 47k Ω
REAR (phono jacks): sensitivity 450mV,
impedance 47k Ω
CENTER (phono jacks): sensitivity 450mV,
impedance 47k Ω
WOOFER (phono jacks): sensitivity 450mV,
impedance 47k Ω
Outputs
PHONES (stereo phone jack):
accepts headphones of
8 Ω or more
VIDEO OUT (phono jack): voltage 250mV,
impedance 1k Ω
MD OUT (phono jacks): voltage 250mV,
impedance 1k Ω
WOOFER OUT (phono jack):
voltage 1V,
impedance 1k Ω
FRONT SPEAKER: accepts impedance of 8
to 16 Ω
CENTER SPEAKER: accepts impedance of 8
to 16 Ω
REAR SPEAKER: accepts impedance of 8
to 16 Ω
— Continued on next page —
Video section
Inputs
VIDEO1 IN (phono jacks): 1Vp-p, 75 Ω
VIDEO2 IN (phono jacks): 1Vp-p, 75 Ω
DVD INPUT VIDEO (phono jacks):
1Vp-p, 75 Ω
Output
VIDEO OUT (phono jack): 1Vp-p, 75 Ω
S-VIDEO OUT (4-pin/mini-DIN jack):
Y : 1Vp-p, unbalanced,
Sync negative,
C : 0.286 V p-p,
load immpedance
75 Ω

Sony HCD-VR90AV Specifications

General

Brand	Sony
Model	HCD-VR90AV
Category	Stereo System
Language	English

Summary

SECTION 2 DISASSEMBLY

2-1. FRONT PANEL

Procedure for disassembling the front panel assembly.

2-2. MAIN BOARD

Steps for removing and accessing the main circuit board.

2-3. SUB PANEL

Instructions for disassembling the sub panel components.

2-4. CD-L/CD-R BOARD AND CD LID ASSEMBLY

Procedure for disassembling CD related boards and lid.

2-5. TAPE MECHANISM DECK AND CASSETTE LID

Steps for disassembling the tape deck mechanism.

2-6. CD MECHANISM DECK

Procedure for removing the CD mechanism unit.

2-7. BASE UNIT

Steps for disassembling the main base unit chassis.

2-8. DISC TABLE

Instructions for disassembling the disc table assembly.

SECTION 3 SERVICE MODE

MC Cold Reset

Procedure for resetting the unit to factory default conditions.

CD Delivery Mode

Mode for positioning the pick-up for safe transport.

MC Hot Reset

Procedure for resetting the unit with preset data retained.

Sled Servo Mode

Mode for operating the CD sled motor freely for maintenance.

AMS Test Mode

Procedure for testing the Automatic Music Sensor (AMS) function.

Aging Mode

Procedure for running the unit through an automated aging test sequence.

SELF-DIAGNOSIS

SECTION 4 MECHANICAL ADJUSTMENTS

Record/Playback Head Azimuth Adjustment

Procedure for adjusting head azimuth for optimal playback.

Tape Speed Adjustment (Deck A)

Steps for adjusting the tape playback speed.

Playback Level Adjustment (Deck A, Deck B)

Procedure for adjusting playback signal levels.

Record Bias Adjustment (Deck B)

Procedure for adjusting the tape recording bias.

Record Level Adjustment (Deck B)

SECTION 5 ELECTRICAL ADJUSTMENTS

SECTION 6 DIAGRAMS

6-39. IC PIN FUNCTIONS

SECTION 8 ELECTRICAL PARTS LIST